1
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Wang B, Zhang Y, Zhang G, Zhang K, Field RW. Innovation and optimization of aeration in free bubbling flat sheet MBRs. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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2
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Wang D, Tao J, Fan F, Xu R, Meng F. A novel pilot-scale IFAS-MBR system with low aeration for municipal wastewater treatment: Linkages between nutrient removal and core functional microbiota. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 776:145858. [PMID: 33640551 DOI: 10.1016/j.scitotenv.2021.145858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/10/2021] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
In this study, we proposed a novel IFAS-MBR with low aeration for the treatment of real municipal wastewater. With biocarriers packed in the anoxic tank, the pilot-scale IFAS-MBR operated with average dissolved oxygen concentrations of 0.56 mg/L in the oxic tank. Over 110 days of operation, highly efficient nutrient removal was achieved with the total nitrogen (TN) and phosphorus (TP) removal efficiencies of 78.1 ± 7.2% and 93.7 ± 5.8%, respectively. The average effluent concentrations of TN and TP reached 5.4 and 0.26 mg/L, respectively. Meanwhile, the removal efficiency of COD reached 95.3 ± 1.3% in the system, and the concentrations of COD decreased from 31.9 ± 3.7 (sludge supernatant) to 12.7 ± 1.6 mg/L (permeate) after membrane filtration. Microbial community analysis showed that Nitrosomonas (0.32%) and Nitrospira (1.85%) in activated sludge were the main drivers of the nitrification process, while various denitrifying bacteria in activated sludge and biofilms were responsible for nitrate reduction in the anoxic tank. Candidatus Accumulibacter (0.34%) and Dechloromonas (1.31%) primarily contributed to denitrifying phosphorus uptake in the anoxic tank. Furthermore, these organisms (i.e., core functional microbiota) exhibited stable levels over the entire operation. The highly enriched hydrolytic fermentation bacteria drove community succession, and the remarkable functional robustness of microbial communities in activated sludge and biofilms favored nutrient removal. Overall, the novel IFAS-MBR system provides an energy-efficient MBR alternative owing to its highly efficient performance and low operating costs enabled by low aeration rates and the absence of an external carbon source.
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Affiliation(s)
- Depeng Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China
| | - Junshi Tao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China
| | - Fuqiang Fan
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China
| | - Ronghua Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China
| | - Fangang Meng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China.
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Mannina G, Alliet M, Brepols C, Comas J, Harmand J, Heran M, Kalboussi N, Makinia J, Robles Á, Rebouças TF, Ni BJ, Rodriguez-Roda I, Victoria Ruano M, Bertanza G, Smets I. Integrated membrane bioreactors modelling: A review on new comprehensive modelling framework. BIORESOURCE TECHNOLOGY 2021; 329:124828. [PMID: 33621928 DOI: 10.1016/j.biortech.2021.124828] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/30/2021] [Accepted: 02/03/2021] [Indexed: 06/12/2023]
Abstract
Integrated Membrane Bioreactor (MBR) models, combination of biological and physical models, have been representing powerful tools for the accomplishment of high environmental sustainability. This paper, produced by the International Water Association (IWA) Task Group on Membrane Modelling and Control, reviews the state-of-the-art, identifying gaps for future researches, and proposes a new integrated MBR modelling framework. In particular, the framework aims to guide researchers and managers in pursuing good performances of MBRs in terms of effluent quality, operating costs (such as membrane fouling, energy consumption due to aeration) and mitigation of greenhouse gas emissions.
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Affiliation(s)
- Giorgio Mannina
- Engineering Department, Palermo University, Viale delle Scienze, Ed.8, 90128 Palermo, Italy.
| | - Marion Alliet
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | | | - Joaquim Comas
- Catalan Institute for Water Research (ICRA), Emili Grahit 101, 17003 Girona, Spain; LEQUiA, Laboratory of Chemical and Environmental Engineering, University of Girona, Campus Montilivi, 17071 Girona, Spain
| | | | - Marc Heran
- IEM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - Nesrine Kalboussi
- Université de Carthage, Institut National ds Sciences Appliquées et de Technologie & Université de Tunis El Manar, Ecole Nationale d'Ingénieurs de Tunis, Laboratoire de Modélisation Mathématique et Numérique dans les sciences d'ingénieur, Tunis, Tunisia
| | - Jacek Makinia
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdansk, Poland
| | - Ángel Robles
- Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria (ETSE-UV), Universitat de València, Avinguda de la Universitat s/n, 46100 Burjassot, València, Spain
| | | | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Ignasi Rodriguez-Roda
- Catalan Institute for Water Research (ICRA), Emili Grahit 101, 17003 Girona, Spain; LEQUiA, Laboratory of Chemical and Environmental Engineering, University of Girona, Campus Montilivi, 17071 Girona, Spain
| | - María Victoria Ruano
- Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria (ETSE-UV), Universitat de València, Avinguda de la Universitat s/n, 46100 Burjassot, València, Spain
| | - Giorgio Bertanza
- Departament of Civil, Environmental, Architectural Engineering and Mathematics, Brescia University, via Branze 43, 25123 Brescia, Italy
| | - Ilse Smets
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F Box 2424, 3001 Heverlee, Belgium
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4
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Mannina G, Cosenza A, Rebouças TF. Aeration control in membrane bioreactor for sustainable environmental footprint. BIORESOURCE TECHNOLOGY 2020; 301:122734. [PMID: 31954967 DOI: 10.1016/j.biortech.2020.122734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/30/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
In this study different scenarios were scrutinized to minimize the energy consumption of a membrane bioreactor system for wastewater treatment. Open-loop and closed-loop scenarios were investigated by two-step cascade control strategies based on dissolved oxygen, ammonia and nitrite concentrations. An integrated MBR model which includes also the greenhouse gas formation/emission processes was applied. A substantial energy consumption reduction was obtained for the closed-loop scenarios (32% for Scenario 1 and 82% for Scenario 2). The air flow control based on both ammonia and nitrite concentrations within the aerobic reactor (Scenario 2) provided excellent results in terms of reduction of operating cost reduction (64%), direct (10%) and indirect (81%) emissions.
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Affiliation(s)
- Giorgio Mannina
- Engineering Department, Viale delle Scienze, Ed.8, 90128 Palermo, Italy; College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Yangpu District, Shanghai 200092, China.
| | - Alida Cosenza
- Engineering Department, Viale delle Scienze, Ed.8, 90128 Palermo, Italy
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Xu B, Albert Ng TC, Huang S, Shi X, Ng HY. Feasibility of isolated novel facultative quorum quenching consortiums for fouling control in an AnMBR. WATER RESEARCH 2020; 114:151-180. [PMID: 31706123 DOI: 10.1016/j.watres.2017.02.006] [Citation(s) in RCA: 478] [Impact Index Per Article: 119.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 01/10/2017] [Accepted: 02/02/2017] [Indexed: 05/06/2023]
Abstract
Anaerobic membrane bioreactor (AnMBR) technology is being recognized as an appealing strategy for wastewater treatment, however, severity of membrane fouling inhibits its widespread implementations. This study engineered novel facultative quorum quenching consortiums (FQQs) coping with membrane fouling in AnMBRs with preliminary analysis for their quorum quenching (QQ) performances. Herein, Acyl-homoserine lactones (AHLs)-based quorum sensing (QS) in a lab-scale AnMBR initially revealed that N-Hexanoyl-dl-homoserine lactone (C6-HSL), N-Octanoyl-dl-homoserine lactone (C8-HSL) and N-Decanoyl-dl-homoserine lactone (C10-HSL) were the dominant AHLs in AnMBRs in this study. Three FQQs, namely, FQQ-C6, FQQ-C8 and FQQ-C10, were harvested after anaerobic screening of aerobic QQ consortiums (AeQQs) which were isolated by enrichment culture, aiming to degrade C6-HSL, C8-HSL and C10-HSL, respectively. Growth of FQQ-C6 and FQQ-C10 using AHLs as carbon source under anaerobic condition was significantly faster than those using acetate, congruously suggesting that their QQ performance will not be compromised in AnMBRs. All FQQs degraded a wide range of AHLs pinpointing their extensive QQ ability. FQQ-C6, FQQ-C8 and FQQ-C10 remarkably alleviated extracellular polymeric substances (EPS) production in a lab-scale AnMBR by 72.46%, 35.89% and 65.88%, respectively, and FQQ-C6 retarded membrane fouling of the AnMBR by 2 times. Bioinformatics analysis indicated that there was a major shift in dominant species from AeQQs to FQQs where Comamonas sp., Klebsiella sp., Stenotrophomonas sp. and Ochrobactrum sp. survived after anaerobic screening and were the majority in FQQs. High growth rate utilizing AHLs under anaerobic condition and enormous EPS retardation efficiency in FQQ-C6 and FQQ-C10 could be attributed to Comamonas sp.. These findings demonstrated that FQQs could be leveraged for QQ under anaerobic systems. We believe that this was the first work proposing a bacterial pool of facultative QQ candidates holding biotechnological promises for membrane fouling control in AnMBRs.
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Affiliation(s)
- Boyan Xu
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576
| | - Tze Chiang Albert Ng
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576
| | - Shujuan Huang
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao, 266033, PR China
| | - How Yong Ng
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576; National University of Singapore Environmental Research Institute, 5A Engineering Drive 1, 117411, Singapore.
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Mei X, Chen Y, Fang C, Xu L, Li J, Bi S, Liu J, Wang Y, Li P, Guo Z, Qin H, Gu J, Xiao Y, Yang X, Zhou B, Zhang Z. Acetonitrile wastewater treatment enhanced by a hybrid membrane-aerated bioreactor containing aerated and non-aerated zones. BIORESOURCE TECHNOLOGY 2019; 289:121754. [PMID: 31323714 DOI: 10.1016/j.biortech.2019.121754] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 06/30/2019] [Accepted: 07/01/2019] [Indexed: 06/10/2023]
Abstract
Acetonitrile (ACN) is a very volatile, toxic and nitrogen-rich organic compound. To enhance ACN wastewater treatment, a novel hybrid membrane-aerated bioreactor (MAB) containing aerated and non-aerated zones was established. A polypropylene hollow fiber membrane module (HF) and a silicone rubber membrane module (SR) were separately used as the bubble-free aeration diffuser and the biofilm carrier, and the non-aerated zones of these two types of reactors were packed with ceramsite. When the influent ACN loading was 1.200 kg/m3·d, under aeration pressures of 20 kPa in the HF-MAB and 40 kPa in the SR-MAB, ACN removal loadings of 1.116 kg/m3·d and 1.004 kg/m3·d, respectively, were achieved, and the TN (total nitrogen) removal loadings were 0.267 kg/m3·d and 0.246 kg/m3·d, respectively. In the MABs, different stratified biofilm structures of the two zones and the diffusion and counter-diffusion of oxygen synergistically promoted ACN degradation, nitrification and denitrification.
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Affiliation(s)
- Xiang Mei
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.
| | - Ying Chen
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Chenhong Fang
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Lijie Xu
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Junhui Li
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Shuqi Bi
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Juan Liu
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Yong Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Pengpeng Li
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Zhongwei Guo
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Hailing Qin
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Jiawei Gu
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Yanyan Xiao
- Nanjing Haiyi Environmental Protection Engineering Co., Ltd., Nanjing 211200, China
| | - Xu Yang
- Nanjing Haiyi Environmental Protection Engineering Co., Ltd., Nanjing 211200, China
| | - Baochang Zhou
- Nanjing RGE Membrane Tech Co., Ltd., Nanjing 210012, China
| | - Ze Zhang
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
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Etemadi H, Yegani R. Effect of aeration rate on the anti-biofouling properties of cellulose acetate nanocomposite membranes in a membrane bioreactor system for the treatment of pharmaceutical wastewater. BIOFOULING 2019; 35:618-630. [PMID: 31307225 DOI: 10.1080/08927014.2019.1637858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 06/25/2019] [Accepted: 06/25/2019] [Indexed: 06/10/2023]
Abstract
In this study, the effect of aeration rate in terms of specific aeration demand per membrane area (SADm) on the anti-biofouling properties of cellulose acetate (CA) nanocomposite membranes (CA/ND-NH2) in a membrane bioreactor system was investigated. The amount of EPS and soluble EPS under high aeration rate conditions was observed to be higher than under low aeration rate conditions. The results obtained showed that either lower or higher aeration rates had a negative impact on membrane permeability. The high aeration rate resulted in a severe breakage of sludge flocs, and promoted the release of soluble EPS from the microbial flocs to the bioreactor tank. By increasing the aeration rate, the COD removal increased and decreased respectively for the membranes and the activated sludge. It was finally concluded that higher anti-biofouling properties of neat CA and nanocomposite membranes were obtained under optimal aeration rate conditions (SADm = 1 m3 m-2 h-1).
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Affiliation(s)
- Habib Etemadi
- Department of Polymer Science and Engineering, University of Bonab, Bonab, Iran
| | - Reza Yegani
- Faculty of Chemical Engineering, Sahand University of Technology, Tabriz, Iran
- Membrane Technology Research Center, Sahand University of Technology, Tabriz, Iran
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Rouquié C, Dahdouh L, Ricci J, Wisniewski C, Delalonde M. Immersed membranes configuration for the microfiltration of fruit-based suspensions. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.01.062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hamedi H, Ehteshami M, Mirbagheri SA, Rasouli SA, Zendehboudi S. Current Status and Future Prospects of Membrane Bioreactors (MBRs) and Fouling Phenomena: A Systematic Review. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23345] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hamideh Hamedi
- Department of Civil EngineeringK. N. Toosi University of TechnologyTehranIran
- Faculty of Engineering and Applied ScienceMemorial UniversitySt. John'sNLCanada
| | - Majid Ehteshami
- Department of Civil EngineeringK. N. Toosi University of TechnologyTehranIran
| | | | - Seyed Abbas Rasouli
- Faculty of Engineering and Applied ScienceMemorial UniversitySt. John'sNLCanada
| | - Sohrab Zendehboudi
- Faculty of Engineering and Applied ScienceMemorial UniversitySt. John'sNLCanada
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Dolina J, Gončuková Z, Bobák M, Dvořák L. Modification of a hollow-fibre polyethersulfone membrane using silver nanoparticles formed in situ for biofouling prevention. RSC Adv 2018; 8:14552-14560. [PMID: 35540741 PMCID: PMC9079955 DOI: 10.1039/c8ra02026d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/04/2018] [Indexed: 11/21/2022] Open
Abstract
Biofouling represents a serious problem limiting the widespread application of membrane technology. Therefore, the aim of this study was to develop and verify a new modification method based on the in situ formation of silver nanoparticles and their incorporation into a membrane polymer to prevent biofouling. The modification method consisted of soaking a commercial hollow-fibre polyethersulfone membrane in a solution of silver ions, diffusion of ions into the membrane polymer, and their reduction using ascorbic acid. Such a modified membrane displayed a lower tendency towards biofouling, exhibiting an about 15% higher permeability compared to an unmodified membrane when filtering actual wastewater treatment plant effluent. The modification also led to the formation of stable silver nanoparticles (mostly in the range of 25–50 nm) homogenously distributed on the surface of the hollow-fibres. This resulted in higher surface hydrophilicity (the water contact angle decreased from 91° to 86°) contributing to the biofouling prevention. The modified membrane also showed high stability, as only 2.1% of the total silver leached after 8 h of filtration. Moreover, no changes in the original membrane cross-section structure or separation properties were observed. Besides the improved antibiofouling properties of the modified membrane, the main advantage of the developed method is its simplicity, short reaction time, absence of high energy-consuming initiation, and the possibility to apply it on site, thus even with commercial membrane modules. It will increase the application potential of membranes in the field of wastewater treatment. As biofouling represents a serious problem limiting the widespread application of membranes, new modification method based on the in situ AgNPs formation leading to antibiofouling properties was developed.![]()
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Affiliation(s)
- Jan Dolina
- Institute for Nanomaterials, Advanced Technologies and Innovation
- Technical University of Liberec
- 461 17 Liberec
- Czech Republic
| | - Zuzanna Gončuková
- Institute for Nanomaterials, Advanced Technologies and Innovation
- Technical University of Liberec
- 461 17 Liberec
- Czech Republic
| | | | - Lukáš Dvořák
- Institute for Nanomaterials, Advanced Technologies and Innovation
- Technical University of Liberec
- 461 17 Liberec
- Czech Republic
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12
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A low energy gravity-driven membrane bioreactor system for grey water treatment: Permeability and removal performance of organics. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.08.037] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Odriozola J, Beltrán S, Dalmau M, Sancho L, Comas J, Rodríguez-Roda I, Ayesa E. Model-based methodology for the design of optimal control strategies in MBR plants. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:2546-2553. [PMID: 28617273 DOI: 10.2166/wst.2017.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This paper proposes a model-based methodology that allows synthesising the most appropriate strategies for optimising the operation of wastewater treatment plants (WWTPs). The methodology is applied with the aim of maximising the nitrogen removal in membrane bioreactors (MBRs). The proposed procedure is based on a systematic approach composed of four steps. First, a sensitivity analysis of the input variables is carried out in order to obtain a first assessment of the potential for operational improvements. Then, the optimum input variable values are calculated by a model-based optimisation algorithm that minimises a cost function associated with the effluent total nitrogen at different temperatures. Then, the optimum operational strategies are identified. Finally, these operational strategies form the conceptual knowledge base for designing automatic control laws. The obtained optimal control strategies have shown a significant improvement in performance in comparison with fixed operation for the studied case, reducing the total nitrogen by 40%.
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Affiliation(s)
- Juan Odriozola
- Vicomtech, Paseo Mikeletegi 57, Parque Científico y Tecnológico de Gipuzkoa, 20009 San Sebastián, Spain E-mail:
| | - Sergio Beltrán
- CEIT and Tecnun (University of Navarra), Manuel de Lardizábal 15, 20018 San Sebastián, Spain
| | - Montse Dalmau
- LEQUIA, Laboratory of Chemical and Environmental Engineering, University of Girona, Campus de Montilivi, E-17071 Girona, Catalonia, Spain
| | - Luis Sancho
- CEIT and Tecnun (University of Navarra), Manuel de Lardizábal 15, 20018 San Sebastián, Spain
| | - Joaquim Comas
- LEQUIA, Laboratory of Chemical and Environmental Engineering, University of Girona, Campus de Montilivi, E-17071 Girona, Catalonia, Spain; ICRA (Catalan Institute for Water Research), Scientific and Technological Park of the University of Girona, H2O Building. c/ Emili Grahit 101, E17003 Girona, Catalonia, Spain
| | - Ignasi Rodríguez-Roda
- LEQUIA, Laboratory of Chemical and Environmental Engineering, University of Girona, Campus de Montilivi, E-17071 Girona, Catalonia, Spain; ICRA (Catalan Institute for Water Research), Scientific and Technological Park of the University of Girona, H2O Building. c/ Emili Grahit 101, E17003 Girona, Catalonia, Spain
| | - Eduardo Ayesa
- CEIT and Tecnun (University of Navarra), Manuel de Lardizábal 15, 20018 San Sebastián, Spain
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Atanasova N, Dalmau M, Comas J, Poch M, Rodriguez-Roda I, Buttiglieri G. Optimized MBR for greywater reuse systems in hotel facilities. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 193:503-511. [PMID: 28249760 DOI: 10.1016/j.jenvman.2017.02.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 01/26/2017] [Accepted: 02/16/2017] [Indexed: 05/26/2023]
Abstract
Greywater is an important alternative water source, particularly in semi-arid, touristic areas, where the biggest water demand is usually in the dry period. By using this source wisely, tourist facilities can substantially reduce the pressure to scarce water resources. In densely urbanized touristic areas, where space has high value, compact solutions such as MBR based greywater reuse systems appear very appropriate. This research focuses on technical and economical evaluation of such solution by implementing a pilot MBR to a hotel with separated grey water. The pilot was operated for 6 months, with thorough characterisation of the GW performed, its operation was monitored and its energy consumption was optimized by applying a control system for the air scour. Based on the pilot operation a design and economic model was set to estimate the feasibility (CAPEX, OPEX, payback period of investment) of appropriate scales of MBR based GW systems, including separation of GW, MBR technology, clean water storage and disinfection. The model takes into account water and energy prices in Spain and a planning period of 20 years. The results demonstrated an excellent performance in terms of effluent quality, while the energy demand for air-scour was reduced by up to 35.2%, compared to the manufacturer recommendations. Economical evaluation of the entire MBR based GW reuse system shows its feasibility for sizes already at 5 m3/day (60 PE). The payback period of the investment for hotels like the demonstration hotel, treating 30 m3/day is 3 years.
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Affiliation(s)
- Natasa Atanasova
- LEQUiA, Institute of the Environment, University of Girona, E-17071, Girona, Spain.
| | - Montserrat Dalmau
- LEQUiA, Institute of the Environment, University of Girona, E-17071, Girona, Spain
| | - Joaquim Comas
- LEQUiA, Institute of the Environment, University of Girona, E-17071, Girona, Spain; ICRA, Catalan Institute for Water Research, Parc Científic Tecnològic de la UdG, 17003, Girona, Spain
| | - Manel Poch
- LEQUiA, Institute of the Environment, University of Girona, E-17071, Girona, Spain
| | - Ignasi Rodriguez-Roda
- LEQUiA, Institute of the Environment, University of Girona, E-17071, Girona, Spain; ICRA, Catalan Institute for Water Research, Parc Científic Tecnològic de la UdG, 17003, Girona, Spain
| | - Gianluigi Buttiglieri
- ICRA, Catalan Institute for Water Research, Parc Científic Tecnològic de la UdG, 17003, Girona, Spain
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Membrane bioreactors – A review on recent developments in energy reduction, fouling control, novel configurations, LCA and market prospects. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.12.010] [Citation(s) in RCA: 274] [Impact Index Per Article: 39.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Díaz O, González E, Vera L, Macías-Hernández JJ, Rodríguez-Sevilla J. Fouling analysis and mitigation in a tertiary MBR operated under restricted aeration. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.12.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mamo J, Insa S, Monclús H, Rodríguez-Roda I, Comas J, Barceló D, Farré MJ. Fate of NDMA precursors through an MBR-NF pilot plant for urban wastewater reclamation and the effect of changing aeration conditions. WATER RESEARCH 2016; 102:383-393. [PMID: 27393963 DOI: 10.1016/j.watres.2016.06.057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/24/2016] [Accepted: 06/27/2016] [Indexed: 06/06/2023]
Abstract
The removal of N-nitrosodimethylamine (NDMA) formation potential through a membrane bioreactor (MBR) coupled to a nanofiltration (NF) pilot plant that treats urban wastewater is investigated. The results are compared to the fate of the individual NDMA precursors detected: azithromycin, citalopram, erythromycin, clarithromycin, ranitidine, venlafaxine and its metabolite o-desmethylvenlafaxine. Specifically, the effect of dissolved oxygen in the aerobic chamber of the MBR pilot plant on the removal of NDMA formation potential (FP) and individual precursors is studied. During normal aerobic operation, implying a fully nitrifying system, the MBR was able to reduce NDMA precursors above 94%, however this removal percentage was reduced to values as low as 72% when changing the conditions to minimize nitrification. Removal decreased also for azithromycin (68-59%), citalopram (31-17%), venlafaxine (35-15%) and erythromycin (61-16%) on average during nitrifying versus non-nitrifying conditions. The removal of clarithromycin, o-desmethylvenlafaxine and ranitidine could not be correlated with the nitrification inhibition, as it varied greatly during the experiment time. The MBR pilot plant is coupled to a nanofiltration (NF) system and the results on the rejection of both, NDMA FP and individual precursors, through this system was above 90%. Finally, results obtained for the MBR pilot plant are compared to the percentage of removal by a conventional full scale biological wastewater treatment plant (WWTP) fed with the same influent. During aerobic operation, the removal of NDMA FP by the MBR pilot plant was similar to the full scale WWTP.
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Affiliation(s)
- Julian Mamo
- Chemical and Environmental Engineering Laboratory (LEQUIA), Institut de Medi Ambient, Campus Montilivi s/n, University of Girona, E-17071, Girona, Catalonia, Spain
| | - Sara Insa
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, H(2)O Building, Emili Grahit 101, 17003, Girona, Spain
| | - Hèctor Monclús
- Chemical and Environmental Engineering Laboratory (LEQUIA), Institut de Medi Ambient, Campus Montilivi s/n, University of Girona, E-17071, Girona, Catalonia, Spain
| | - Ignasi Rodríguez-Roda
- Chemical and Environmental Engineering Laboratory (LEQUIA), Institut de Medi Ambient, Campus Montilivi s/n, University of Girona, E-17071, Girona, Catalonia, Spain; Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, H(2)O Building, Emili Grahit 101, 17003, Girona, Spain
| | - Joaquim Comas
- Chemical and Environmental Engineering Laboratory (LEQUIA), Institut de Medi Ambient, Campus Montilivi s/n, University of Girona, E-17071, Girona, Catalonia, Spain; Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, H(2)O Building, Emili Grahit 101, 17003, Girona, Spain
| | - Damià Barceló
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, H(2)O Building, Emili Grahit 101, 17003, Girona, Spain; Water and Soil Quality Research Group, Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034, Barcelona, Spain
| | - Maria José Farré
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, H(2)O Building, Emili Grahit 101, 17003, Girona, Spain.
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Tang X, Ding A, Qu F, Jia R, Chang H, Cheng X, Liu B, Li G, Liang H. Effect of operation parameters on the flux stabilization of gravity-driven membrane (GDM) filtration system for decentralized water supply. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:16771-16780. [PMID: 27189452 DOI: 10.1007/s11356-016-6857-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 05/09/2016] [Indexed: 06/05/2023]
Abstract
A pilot-scale gravity-driven membrane (GDM) filtration system under low gravitational pressure without any pre-treatment, backwash, flushing, or chemical cleaning was carried out to investigate the effect of operation parameters (including operation pressure, aeration mode, and intermittent filtration) on the effluent quality and permeability development. The results revealed that GDM system exhibited an efficient performance for the removal of suspended substances and organic compounds. The stabilization of flux occurred and the average values of stable flux were 6.6, 8.1, and 8.6 Lm(-2) h(-1) for pressures of 65, 120, and 200 mbar, respectively. In contrast, flux stabilization was not observed under continuous and intermittent aeration conditions. However, aeration (especially continuous aeration) was effective to improve flux and alleviate membrane fouling during 1-month operation. Moreover, intermittent filtration would influence the stabilization of permeate flux, resulting in a higher stable flux (ranging from 6 to 13 Lm(-2) h(-1)). The stable flux significantly improved with the increase of intermittent period. Additionally, GDM systems exhibited an efficient recovery of flux after simple physical cleaning and the analyses of resistance reversibility demonstrated that most of the total resistance was hydraulic reversible resistance (50-75 %). Therefore, it is expected that the results of this study can develop strategies to increase membrane permeability and reduce energy consumption in GDM systems for decentralized water supply.
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Affiliation(s)
- Xiaobin Tang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, People's Republic of China
| | - An Ding
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, People's Republic of China
| | - Fangshu Qu
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, People's Republic of China
| | - Ruibao Jia
- Jinan Water and Wastewater Monitoring Center, No. 68 Weiwu Road, Shizhong District, Jinan, 250021, China
| | - Haiqing Chang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, People's Republic of China
| | - Xiaoxiang Cheng
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, People's Republic of China
| | - Bin Liu
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, People's Republic of China
| | - Guibai Li
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, People's Republic of China
| | - Heng Liang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, People's Republic of China.
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Gotovtsev PM, Yuzbasheva EY, Gorin KV, Butylin VV, Badranova GU, Perkovskaya NI, Mostova EB, Namsaraev ZB, Rudneva NI, Komova AV, Vasilov RG, Sineokii SP. Immobilization of microbial cells for biotechnological production: Modern solutions and promising technologies. APPL BIOCHEM MICRO+ 2015. [DOI: 10.1134/s0003683815080025] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Monclús H, Dalmau M, Gabarrón S, Ferrero G, Rodríguez-Roda I, Comas J. Full-scale validation of an air scour control system for energy savings in membrane bioreactors. WATER RESEARCH 2015; 79:1-9. [PMID: 25965883 DOI: 10.1016/j.watres.2015.03.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 03/24/2015] [Accepted: 03/25/2015] [Indexed: 06/04/2023]
Abstract
Membrane aeration represents between 35 and 50% of the operational cost of membrane bioreactors (MBR). New automatic control systems and/or module configurations have been developed for aeration optimization. In this paper, we briefly describe an innovative MBR air scour control system based on permeability evolution and present the results of a full-scale validation that lasted over a 1-year period. An average reduction in the air scour flow rate of 13% was achieved, limiting the maximum reduction to 20%. This averaged reduction corresponded to a decrease in energy consumption for membrane aeration of 14% (0.025 kWh m(-3)) with maximum saving rates of 22% (0.04 kWh m(-3)). Permeability and fouling rate evolution were not affected by the air scour control system, as very similar behavior was observed for these variables for both filtration lines throughout the entire experimental evaluation period of 1 year.
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Affiliation(s)
- Hèctor Monclús
- LEQUIA, Institute of the Environment, University of Girona, E17071, Girona, Catalonia, Spain.
| | - Montserrat Dalmau
- LEQUIA, Institute of the Environment, University of Girona, E17071, Girona, Catalonia, Spain.
| | - Sara Gabarrón
- ICRA (Catalan Institute for Water Research), Scientific and Technological Park of the University of Girona, H2O Building, c/ Emili Grahit 101, E17003, Girona, Spain.
| | - Giuliana Ferrero
- UNESCO-IHE Institute for Water Education, Westvest 7, 2611 AX, Delft, The Netherlands.
| | - Ignasi Rodríguez-Roda
- LEQUIA, Institute of the Environment, University of Girona, E17071, Girona, Catalonia, Spain; ICRA (Catalan Institute for Water Research), Scientific and Technological Park of the University of Girona, H2O Building, c/ Emili Grahit 101, E17003, Girona, Spain.
| | - Joaquim Comas
- LEQUIA, Institute of the Environment, University of Girona, E17071, Girona, Catalonia, Spain; ICRA (Catalan Institute for Water Research), Scientific and Technological Park of the University of Girona, H2O Building, c/ Emili Grahit 101, E17003, Girona, Spain.
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