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Akinola OT, Dahunsi SO, Okoh A. Draft genome sequence of multi-drug resistant Klebsiella quasipneumoniae subsp. similipneumoniae isolated from a teaching hospital wastewater in South West, Nigeria. Microbiol Resour Announc 2024; 13:e0072723. [PMID: 38270434 PMCID: PMC10868183 DOI: 10.1128/mra.00727-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 12/15/2023] [Indexed: 01/26/2024] Open
Abstract
This broadcast is about the whole genome sequence of Klebsiella quasipneumoniae subsp. similipneumoniae (ST 1422) isolated from a teaching hospital wastewater in South West, Nigeria, in May 2022. This data set compiles information on the DNA size (5,332,183 bp) and GC content (57.91%) in its genome.
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Affiliation(s)
- Omowumi T. Akinola
- Microbiology Programme, College of Agriculture, Engineering, and Science, Bowen University Iwo, Iwo, Osun, Nigeria
| | - Samuel O. Dahunsi
- Microbiology Programme, College of Agriculture, Engineering, and Science, Bowen University Iwo, Iwo, Osun, Nigeria
- The Radcliffe Institute for Advanced Study, Harvard University, Cambridge, Massachusetts, USA
| | - Anthony Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
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Ibikunle RA, Titiladunayo IF, Dahunsi SO, Akeju EA, Osueke CO. Characterization and projection of dry season municipal solid waste for energy production in Ilorin metropolis, Nigeria. Waste Manag Res 2021; 39:1048-1057. [PMID: 33908839 DOI: 10.1177/0734242x20985599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This research investigates the quantity of municipal solid waste produced during the dry season, and its characterization at Eyenkorin dumpsite of Ilorin metropolis, along the Lagos-Ilorin express way. The physicochemical and thermal compositions of the combustible fractions of municipal solid waste were analysed, to ascertain the available calorific value. In this research, the quantity (tonnes) of waste generated, the rate of generation (kg per capita per day), its sustainability and the likely energy and power potentials in the dry season, were essentially predicted. The population responsible for municipal solid waste generation during this study was 1,120,834 people. During the characterization study from November 2018 to February 2019, it was established that 203,831 tonnes of municipal solid waste was produced during the four months of the dry season, at the rate of 1.12 kg per capita per day. It was found that 280 tonnes/day of municipal solid waste with low heating value of 19 MJ kg-1, would generate 1478 MWh of heat energy and 18 MW of electrical energy potentials discretely, and grid of 13 kW.
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Affiliation(s)
- R A Ibikunle
- Department of Mechanical Engineering, Landmark University, Nigeria
| | - I F Titiladunayo
- Department of Mechanical Engineering, Federal University of Technology, Nigeria
| | - S O Dahunsi
- Microbiology Programme, College of Agriculture, Engineering and Science, Bowen University, Nigeria
| | - E A Akeju
- Department of Mechanical Engineering, Landmark University, Nigeria
| | - C O Osueke
- Department of Mechanical Engineering, Landmark University, Nigeria
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3
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Dahunsi SO, Ogunwole JO, Owoseni AA, Olutona GO, Nejo YT, Atobatele OE. Valorization of pineapple peel and poultry manure for clean energy generation. Food Energy Secur 2021. [DOI: 10.1002/fes3.228] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Samuel O. Dahunsi
- Microbiology Programme College of Agriculture, Engineering and Science Bowen University Iwo, Osun State Nigeria
| | - Joshua O. Ogunwole
- Agriculture Programme College of Agriculture, Engineering and Science Bowen University Iwo, Osun State Nigeria
| | - Abimbola A. Owoseni
- Microbiology Programme College of Agriculture, Engineering and Science Bowen University Iwo, Osun State Nigeria
| | - Godwin O. Olutona
- Industrial Chemistry Programme College of Agriculture, Engineering and Science Bowen University Iwo, Osun State Nigeria
| | - Yewande T. Nejo
- Microbiology Programme College of Agriculture, Engineering and Science Bowen University Iwo, Osun State Nigeria
| | - Oluwatosin E. Atobatele
- Pure and Applied Biology Programme College of Agriculture, Engineering and Science Bowen University Iwo, Osun State Nigeria
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Dahunsi SO, Oranusi S, Efeovbokhan VE, Adesulu-Dahunsi AT, Ogunwole JO. Crop performance and soil fertility improvement using organic fertilizer produced from valorization of Carica papaya fruit peel. Sci Rep 2021; 11:4696. [PMID: 33633336 PMCID: PMC7907234 DOI: 10.1038/s41598-021-84206-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 02/12/2021] [Indexed: 11/19/2022] Open
Abstract
In recent times, research attention is focusing on harnessing agricultural wastes for the production of value-added products. In this study, the valorization of Carica papaya (Pawpaw) fruit peels was evaluated for the production of quality organic fertilizer via anaerobic digestion (AD) while the effects of the fertilizer on maize crop were also assessed. Pawpaw peel was first pretreated by thermo-alkaline methods before AD and analyses were carried out using standard methods. The resulting digestate was rich in nutrients and was dewatered to form solid organic fertilizer rich in microbes and soil nutrients. When applied to maize plants, organic fertilizer showed a better effect on plant traits than NPK 15–15–15 fertilizer and without fertilizer application. These were more pronounced at mid to high organic fertilizer applications (30-to-60-kg nitrogen/hectare (kg N/ha)) rate. Comparison between the values obtained from the field experiments reveals that the organic fertilizer showed better performance in all parameters such as the number of leaves, leaf area, plant height, stem girth, total shoot, and root biomass, and length of the root. However, the chemical fertilizer outperformed all the organic fertilizer applied rates in the average highest size of the corn ear by 1.4%. After harvesting, nutrient elements were found to have bioaccumulated in plant organs (leaves, stem, and root) with the highest values being 29.7 mg/L for nitrogen in the leaf and this value was reported from the experiment with 50 kg N/ha. For phosphorus and potassium, the highest concentrations of 7.05 and 8.4 mg/L were recorded in the plant’ stem of the experiment with 50 kg N/ha. All the treated soils recorded an increase in values of all nutrient elements over the control with the highest values recorded in the experiment with 60 kg N/ha. In soil with 60 kg N/ha, the nitrogen, phosphorus, and potassium increased by 28, 40, and 22% respectively over the chemical fertilizer applied experiment while different levels of increases were also recorded for all other macro and microelements in all the experiments. Thus, agricultural practices by using anaerobic digestates as organic fertilizers is a sustainable method to overcome the dependence on inorganic fertilizers high rate.
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Affiliation(s)
- S O Dahunsi
- Microbiology Programme, College of Agriculture, Engineering and Science, Bowen University, Iwo, Osun State, Nigeria.
| | - S Oranusi
- Department of Biological Sciences, Covenant University, Ota, Ogun State, Nigeria
| | - V E Efeovbokhan
- Department of Chemical Engineering, Covenant University, Ota, Ogun State, Nigeria
| | - A T Adesulu-Dahunsi
- Food Science and Technology Programme, College of Agriculture, Engineering and Science, Bowen University, Iwo, Osun State, Nigeria
| | - J O Ogunwole
- Agriculture Programme, College of Agriculture, Engineering and Science, Bowen University, Iwo, Osun State, Nigeria
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Oladejo OS, Dahunsi SO, Adesulu-Dahunsi AT, Ojo SO, Lawal AI, Idowu EO, Olanipekun AA, Ibikunle RA, Osueke CO, Ajayi OE, Osueke N, Evbuomwan I. Energy generation from anaerobic co-digestion of food waste, cow dung and piggery dung. Bioresour Technol 2020; 313:123694. [PMID: 32563793 DOI: 10.1016/j.biortech.2020.123694] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 06/11/2020] [Accepted: 06/13/2020] [Indexed: 06/11/2023]
Abstract
The study investigated bioenergy generation from anaerobic co-digestion of food wastes (FW), cow dung (CD) and piggery dung (PD). The physicochemical parameters of the substrates were determined before and after digestion following standard procedures after mechanical pretreatment. Throughout the study, pH remained slightly alkaline while temperature varied between 26 and 32 °C. The highest cumulative biogas yield of 0.0488 L was recorded from the digestion of FW + CD + PD on the ninth day. After analyses, the highest methane content of 64.6 was obtained from the digestion of FW + PD while the lowest (54.0%) was from the digestion of FW only. Overall, cumulative biogas production for the four digestion regimes followed the order: FW + CD + PD, FW + PD, FW + CD and FW only respectively. Accumulation of VFAs was recorded at a slow rate during the digestions.
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Affiliation(s)
- Oladipupo S Oladejo
- Department of Civil Engineering, Ladoke Akintola University of Technology, Ogbomosho, Oyo State, Nigeria
| | - Samuel O Dahunsi
- Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
| | | | - Samuel O Ojo
- Department of Civil Engineering, Ladoke Akintola University of Technology, Ogbomosho, Oyo State, Nigeria
| | | | - Eunice O Idowu
- Department of Civil Engineering, Ladoke Akintola University of Technology, Ogbomosho, Oyo State, Nigeria
| | - Adewoye A Olanipekun
- Department of Civil Engineering, Ladoke Akintola University of Technology, Ogbomosho, Oyo State, Nigeria
| | | | | | | | - Ngozi Osueke
- Landmark University, Omu Aran, Kwara State, Nigeria
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Edosomwan EU, Evbuomwan IO, Agbalalah C, Dahunsi SO, Abhulimhen-Iyoha BI. Malaria coinfection with Neglected Tropical Diseases (NTDs) in children at Internally Displaced Persons (IDP) camp in Benin City, Nigeria. Heliyon 2020; 6:e04604. [PMID: 32793830 PMCID: PMC7408312 DOI: 10.1016/j.heliyon.2020.e04604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/03/2020] [Accepted: 07/28/2020] [Indexed: 11/05/2022] Open
Abstract
Malaria and Neglected Tropical Diseases (NTDs) are highly endemic in poorer countries of the world. The research investigated the prevalence of parasitic infections among children in Internally Displaced Persons (IDP) camp in Benin City. Faecal, urine and blood specimen were collected from 184 children (100 males and 84 females) aged 6–15. Blood samples were prepared using thick film method and analyzed microscopically. Direct smear technique was employed for faecal sample and sedimentation method to concentrate ova from the urine sample. Ten species of parasites were identified in this study. The predominant species were Plasmodium falciparum (67.93%), Entamoeba histolytica (67.93%) and Giardia duodenalis (59.78%). Plasmodium falciparum and E. histolytica were most prevalent in both sexes, with P. falciparum infecting 68% males and 67.86% females while E. histolytica infected 66% males and 70.24% females (P = 0.24). Mixed infections with blood and intestinal parasites were recorded in 41.18% in age group 5–10 and 47.90% in age group 11–15 (P < 0.5). Also, mixed infections with blood and intestinal parasites were detected in 45% males and 50% females (P = 0.51). Urinary schistosomiasis was recorded in 28.80% of the participants. Parasitic infections especially P. falciparum malaria and amoebiasis were predominant among the children. Therefore, our findings call for specific intervention programmes to reduce parasite intensity and morbidity in the children. Environmental and personal hygiene should be implemented in order to curb parasitosis in the study area.
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Affiliation(s)
- Evelyn U Edosomwan
- Department of Animal and Environmental Biology, University of Benin, Benin City, Nigeria
| | - Ikponmwosa O Evbuomwan
- Applied Biology and Biotechnology Programme, Department of Microbiology, Landmark University, Omu-Aran, Kwara State, Nigeria
| | - Cynthia Agbalalah
- Department of Animal and Environmental Biology, University of Benin, Benin City, Nigeria
| | - Samuel O Dahunsi
- Department of Microbiology, Landmark University, Omu-Aran, Kwara State, Nigeria
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7
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Dahunsi SO, Osueke CO, Olayanju TMA, Lawal AI. Co-digestion of Theobroma cacao (Cocoa) pod husk and poultry manure for energy generation: Effects of pretreatment methods. Bioresour Technol 2019; 283:229-241. [PMID: 30913431 DOI: 10.1016/j.biortech.2019.03.093] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 03/16/2019] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
In this study, biogas was produced from the anaerobic co-digestion of Cocoa pod husk (CPH) and poultry manure. Pretreatment of the CPH was carried out using sulfuric acid and hydrogen peroxide. The physicochemical, elemental and structural analyses were carried out on the CPH before and after pretreatment. The microbial composition of the fermenting materials were also determined using standard method while the Fourier Transform Infra-red (FTIR) spectroscopy was used to identify the structural changes that took place after pretreatments. Use of alkaline hydrogen peroxide caused high solubilization of the lignin component of the CPH and reduced up to 81% of lignin i.e. initial value of 21.7% m.m-1 to final value of 4.2% m.m-1. Similarly, the alkali reduced the hemicellulose content of the CPH from 27.0% m.m-1 to 8.5% m.m-1. Overall, there was 68% increase in biogas volume from the alkaline pretreated CPH.
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Affiliation(s)
- S O Dahunsi
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
| | - C O Osueke
- Department of Mechanical Engineering, Landmark University, Nigeria
| | - T M A Olayanju
- Department of Agricultural and Biosystems Engineering, Landmark University, Nigeria
| | - A I Lawal
- Department of Accounting and Finance, Landmark University, Nigeria
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Dahunsi SO. Mechanical pretreatment of lignocelluloses for enhanced biogas production: Methane yield prediction from biomass structural components. Bioresour Technol 2019; 280:18-26. [PMID: 30754002 DOI: 10.1016/j.biortech.2019.02.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 01/29/2019] [Accepted: 02/01/2019] [Indexed: 05/22/2023]
Abstract
In this study, mechanical pretreatment was applied to six different lignocelluloses in two different treatment phases and the prediction of their methane yield was done from biomass chemical composition. Physicochemical, proximate and microbial analyses were carried out on both pretreated and untreated biomass using standard methods. Mechanical pretreatments caused the breakdown of structural materials in all the used biomass which was characterized by reduction of the lagging time during anaerobic digestion and the subsequent increase in methane yield up to 22%. The different loading rate of biomass had no effect on the overall methane yield increase. Both single and multiple linear regressions models were used in order to correlate the chemical composition of the biomass with their methane potentials and a fairly high correlation (R2 = 0.63) was obtained. The study also showed that the pretreatments are economically feasible. Therefore, its further application to other biomass is encouraged.
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Affiliation(s)
- S O Dahunsi
- Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Biomass and Bioenergy Group, Environment and Technology Research Cluster, Landmark University, Nigeria.
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Dahunsi SO, Olayanju A, Izebere JO, Oluyori AP. Data on energy and economic evaluation and microbial assessment of anaerobic co-digestion of fruit rind of Telfairia occidentalis (Fluted pumpkin) and poultry manure. Data Brief 2018; 21:97-104. [PMID: 30338282 PMCID: PMC6186960 DOI: 10.1016/j.dib.2018.09.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 09/20/2018] [Accepted: 09/24/2018] [Indexed: 11/29/2022] Open
Abstract
The data described in this article was obtained in an experiment designed for the generation of biogas from the anaerobic co-digestion of Telfairia occidentalis (Fluted pumpkin) fruit rind and poultry manure both of which currently constitute an environmental nuisance in the localities where they are found. The data presented in this article is on the use of combined heat and power (CHP) system to assess the energy and economic feasibility of applying thermo-alkali pretreatment procedures to one of the substrates (Fluted pumpkin) prior to anaerobic digestion. Also, the microbial characterization and succession pattern of important microbes during the anaerobic digestion process was evaluated and the data reported in this paper.
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Affiliation(s)
- S O Dahunsi
- Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Biomass and Bioenergy Group, Environment and Technology Research Cluster, Landmark University, Omu-Aran, Kwara State, Nigeria
| | - A Olayanju
- Biomass and Bioenergy Group, Environment and Technology Research Cluster, Landmark University, Omu-Aran, Kwara State, Nigeria.,Department of Agricultural and Biosystems Engineering, Landmark University, Omu-Aran, Kwara State, Nigeria
| | - J O Izebere
- Biomass and Bioenergy Group, Environment and Technology Research Cluster, Landmark University, Omu-Aran, Kwara State, Nigeria
| | - A P Oluyori
- Physical Sciences Department, Landmark University, Omu-Aran, Kwara State, Nigeria
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Dahunsi SO, Oranusi S, Efeovbokhan VE. Pretreatment optimization, process control, mass and energy balances and economics of anaerobic co-digestion of Arachis hypogaea (Peanut) hull and poultry manure. Bioresour Technol 2017; 241:454-464. [PMID: 28599224 DOI: 10.1016/j.biortech.2017.05.152] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 05/18/2017] [Accepted: 05/25/2017] [Indexed: 06/07/2023]
Abstract
The study explored biogas production from the co-digestion of Arachis hypogaea hull and poultry droppings. Mechanical and thermo-alkaline pretreatments were applied to a sample of the mixture. Another sample was treated mechanically but without thermo-alkaline methods. Optimization was done using the Response Surface Methodology (RSM) and the Artificial Neural Networks (ANNs). The optimal values for each of the five major parameters optimized are Temperature of 32.00°C, pH of 7.62, Retention time of 30.00 day, Total solids of 12.00g/kg and Volatile solids of 10.00g/kg and the predicted biogas yield for RSM was 3903.1510-3m3/kg TSfed and 3338.310-3m3/kg TSfed for ANNs in the thermo-alkaline pretreated experiment. Gas chromatography show the CH4 and CO2 content of biogas generated to be 65.5±1.5%; 26±1% and 53±1%; 26±2% respectively. The co-digestion of peanut hull with poultry droppings and other energy-yielding substrates is further encouraged.
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Affiliation(s)
- S O Dahunsi
- Biomass and Bioenergy Group, Environment and Technology Research Cluster, Landmark University, Nigeria; Biological Sciences Department, Landmark University, Omu-Aran, Nigeria
| | - S Oranusi
- Biological Sciences Department, Covenant University, Ota, Nigeria.
| | - V E Efeovbokhan
- Chemical Engineering Department, Covenant University, Ota, Nigeria
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Dahunsi SO, Oranusi S, Owolabi JB, Efeovbokhan VE. Synergy of Siam weed (Chromolaena odorata) and poultry manure for energy generation: Effects of pretreatment methods, modeling and process optimization. Bioresour Technol 2017; 225:409-417. [PMID: 27956328 DOI: 10.1016/j.biortech.2016.11.123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 11/28/2016] [Accepted: 11/30/2016] [Indexed: 06/06/2023]
Abstract
The co-digestion of Chromolaena odorata with poultry manure was evaluated in this study. Two samples of the weed: (A: which was pre-treated with mechanical, chemical and thermal methods) and (B: which was pretreated using mechanical and chemical methods only) were separately digested with poultry manure. Biogas generation started from the 2nd to 4th and 4th to 7th day for samples 'A' and 'B' respectively. The most desired actual biogas yield from samples 'A' and 'B' were 3884.20 and 2544.70 (10-4m3/kg VS) respectively and the gas composition was 68±2% Methane and 20±2% Carbon dioxide for sample A while it was 62±3% Methane and 22±2% Carbon dioxide for sample B. In all, there was a 38.06% increase in gas generation in 'A' over 'B'. The coefficient of determination (R2) for the Response Surface Methodology (RSM) model (0.9009) was high suggesting high accuracy in the modeling and prediction. The worldwide usage of C. odorata is encouraged.
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Affiliation(s)
- S O Dahunsi
- Biological Sciences Department, Landmark University, Nigeria
| | - S Oranusi
- Biological Sciences Department, Covenant University, Nigeria.
| | - J B Owolabi
- All Saints University College of Medicine, Kingstown, Saint Vincent and the Grenadines
| | - V E Efeovbokhan
- Chemical Engineering Department, Covenant University, Nigeria
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Dahunsi SO, Oranusi S, Owolabi JB, Efeovbokhan VE. Comparative biogas generation from fruit peels of fluted pumpkin (Telfairia occidentalis) and its optimization. Bioresour Technol 2016; 221:517-525. [PMID: 27686720 DOI: 10.1016/j.biortech.2016.09.065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Revised: 09/13/2016] [Accepted: 09/15/2016] [Indexed: 06/06/2023]
Abstract
This study evaluated the potentials of fluted pumpkin fruit peels for biogas generation using three different pre-treatment methods (A, B, C) and the optimization of its process parameters. The physic-chemical characteristics of the substrates revealed it to be rich in nutrients and mineral elements needed by microorganisms. Gas chromatography analysis revealed the gas composition to be within the range of 58.5±2.5% Methane and 27±3% Carbon dioxide for all the three digestions. The study revealed that combination of three pre-treatment methods enhanced enormous biogas yield from the digested substrates as against the use of two methods and no pre-treatment experiment. Optimization of the generated biogas data revealed that RSM predicted higher gas yield than ANN, the latter gives higher accuracy and efficiency than the former. It is advocated that fluted pumpkin fruit peels be used for energy generation especially in the locations of its abundance.
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Affiliation(s)
- S O Dahunsi
- Biological Sciences Department, Landmark University, Omu-Aran, Kwara State, Nigeria
| | - S Oranusi
- Biological Sciences Department, Covenant University, Ota, Ogun State, Nigeria.
| | - J B Owolabi
- All Saints University College of Medicine, Kingstown, Saint Vincent and the Grenadines
| | - V E Efeovbokhan
- Chemical Engineering Department, Covenant University, Ota, Ogun State, Nigeria
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Dahunsi SO, Oranusi S, Owolabi JB, Efeovbokhan VE. Mesophilic anaerobic co-digestion of poultry dropping and Carica papaya peels: Modelling and process parameter optimization study. Bioresour Technol 2016; 216:587-600. [PMID: 27285574 DOI: 10.1016/j.biortech.2016.05.118] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 05/23/2016] [Accepted: 05/28/2016] [Indexed: 06/06/2023]
Abstract
The study evaluated anaerobic co-digestion of poultry dropping and pawpaw peels and the optimization of important process parameters. The physic-chemical analyses of the substrates were done using standard methods after application of mechanical, thermal and chemical pre-treatments methods. Gas chromatography analysis revealed the gas composition to be within the range of 66-68% methane and 18-23% carbon dioxide. The study equally revealed that combination of the different pre-treatment methods enhanced enormous biogas yield from the digestion. Optimization of the generated biogas data were carried out using the Response Surface Methodology and the Artificial Neural Networks. The coefficient of determination (R(2)) for RSM (0.9181) was lower compare to that of ANN (0.9828). This shows that ANN model gives higher accuracy than RSM model for the current. Further usage of Carica papaya peels for biogas generation is advocated.
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Affiliation(s)
- S O Dahunsi
- Biological Sciences Department, Landmark University, Nigeria.
| | - S Oranusi
- Biological Sciences Department, Covenant University, Nigeria.
| | - J B Owolabi
- All Saints University College of Medicine, Kingstown, Saint Vincent and the Grenadines
| | - V E Efeovbokhan
- Chemical Engineering Department, Covenant University, Nigeria
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Ayandiran TA, Dahunsi SO. Toxicological assessment of fish (Clarias gariepinus) from bitumen-polluted River Oluwa, Nigeria. Environ Monit Assess 2016; 188:71. [PMID: 26725477 DOI: 10.1007/s10661-015-5003-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 11/20/2015] [Indexed: 06/05/2023]
Abstract
Toxicological evaluation of Clarias gariepinus from bitumen-polluted River Oluwa, Nigeria, was carried out in furtherance of studies on the environmental impacts of the bitumen exploration in Ondo State, Nigeria. Samples were taken from three different (two polluted and one as control) sites. The effect of changes in monthly seasonal flow rate was assessed for the sites of study. Blood plasma clinical-chemical parameters (BCCPs) and histological changes/lesions in various organs were evaluated as markers of pollution in the fish blood using standard methods. The result of the physicochemical properties of water from the sampling points revealed some of the values conforming to approved standards while others showed deviation. Significant differences were found in the blood and histological endpoints between the control and the polluted sites as well as between the two seasons evaluated across the sites. The public health implications of consuming this fish are fully discussed.
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Affiliation(s)
- T A Ayandiran
- Ladoke Akintola University of Technology, Ogbomoso, Oyo state, Nigeria.
| | - S O Dahunsi
- Landmark University, Omu-Aran, Kwara State, Nigeria.
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Oranusi S, Dahunsi SO. Preliminary study on hazards and critical control points of kokoro, a Nigerian indigenous fermented maize snack. Springerplus 2015; 4:253. [PMID: 26090302 PMCID: PMC4467818 DOI: 10.1186/s40064-015-1026-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 05/11/2015] [Indexed: 11/10/2022]
Abstract
The microbial and proximate composition of an indigenous snack from fermented maize was investigated. Critical control points of milling the raw materials, fermentation pH, processing temperature and time intervals during holdings in processing and storage were evaluated with a view to optimizing the product. The mean total aerobic plate count (TAPC) log10 values for samples of the finished products range from 2.07 ± 0.50 to 4.36 ± 0.10 cfu/g. Mean fungi count log10 was 2.00 ± 0.00 to 3.50 ± 0.50 while mean coliform count 1.04 ± 0.10 log10 cfu/g was detected in one of the sales outlets investigated. Bacterial and fungal species were isolated belonging to the genera Aspergillus, Rhizopus, Penicillium, Fusarium, Cephalosporium, Alternaria, Bacillus, Klebsiella, Staphylococcus, Lactobacillus, Pseudomonas, Proteus and Enterobacter. The moisture content of the samples ranged from 3.41 to 6.75%; fat content was 19.68 to 32.59%; fiber content was 1.84 to 2.78% while protein ranged from 6.76 to 9.23%. The ash and carbohydrate contents ranged from 1.97 to 2.31% and 49.21 to 61.96%, respectively. Based on the specifications by International Commission for Microbiological Specification for Foods (ICMSF), the TAPC counts of the finished products remained at low levels. However, presence of coliforms could prejudice the hygienic quality of these types of products hence, the need for quality control.
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Affiliation(s)
- S Oranusi
- Department of Biological Sciences, Covenant University, Ota, Ogun State Nigeria
| | - S O Dahunsi
- Department of Biological Sciences, Landmark University, Omu-Aran, Kwara State Nigeria
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16
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Alfa IM, Dahunsi SO, Iorhemen OT, Okafor CC, Ajayi SA. Comparative evaluation of biogas production from poultry droppings, cow dung and lemon grass. Bioresour Technol 2014; 157:270-277. [PMID: 24561633 DOI: 10.1016/j.biortech.2014.01.108] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 01/19/2014] [Accepted: 01/24/2014] [Indexed: 06/03/2023]
Abstract
The study explored the production of biogas from Lemon grass, Cow dung and Poultry droppings. The three substrates were pre-fermented according to standard methods. Six (6) kg of each pre-fermented substrate was mixed with water in ratio 1:1 v/v to form slurry and digested for 30days. A total of 0.125m(3), 0.191m(3) and 0.211m(3) of biogas were respectively produced from the Lemon grass, Cow dung and Poultry droppings with deviations of 0.00234m(3), 0.00289 m(3) and 0.00484 m(3) respectively. The cooking test carried out revealed that the scrubbed gas had higher cooking rates for water (0.12L/min, 0.085L/min and 0.079L/min for Lemon grass, Cow dung and Poultry droppings respectively) while the cooking rates for unscrubbed gas were 0.079L/min, 0.064L/min and 0.06L/min respectively. The pH of the medium fluctuated optimally between 6.5 and 7.8. The research demonstrated that Lemon grass produced less volume but better quality biogas compared to Cow dung and Poultry droppings.
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Affiliation(s)
- I M Alfa
- Department of Water Resources & Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria.
| | - S O Dahunsi
- Department of Biological Sciences, Landmark University, Omu-Aran, Nigeria.
| | - O T Iorhemen
- School of Civil Engineering, University of Leeds, United Kingdom
| | - C C Okafor
- Department of Water Resources & Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria
| | - S A Ajayi
- Department of Agricultural Engineering, Ahmadu Bello University, Zaria, Nigeria
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Owamah HI, Dahunsi SO, Oranusi US, Alfa MI. Fertilizer and sanitary quality of digestate biofertilizer from the co-digestion of food waste and human excreta. Waste Manag 2014; 34:747-752. [PMID: 24556263 DOI: 10.1016/j.wasman.2014.01.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 01/25/2014] [Accepted: 01/27/2014] [Indexed: 06/03/2023]
Abstract
This research was aimed at assessing the fertilizer quality and public health implications of using digestate biofertilizer from the anaerobic digestion of food wastes and human excreta. Twelve (12) kg of food wastes and 3kg of human excreta were mixed with water in a 1:1 w/v to make 30-l slurry that was fed into the anaerobic digester to ferment for 60days at mesophilic temperature (22-31°C). Though BOD, COD, organic carbon and ash content in the feedstock were reduced after anaerobic digestion by 50.0%, 10.6%, 74.3% and 1.5% respectively, nitrogen, pH and total solids however increased by 12.1%, 42.5% and 12.4% respectively. The C/N ratios of the feedstock and compost are 135:1 and 15.8:1. The residual total coliforms of 2.10×10(8)CFU/100ml in the digestate was above tolerable limits for direct application on farmlands. Microbial analysis of the digestate biofertilizer revealed the presence of Pseudomonas, Klebsiella, Clostridium, Bacillus, Bacteroides, Penicillum, Salmollena, and Aspergillus. Klebsiella, Bacillus, Pseudomonas, Penicillum and Aspergillus can boost the efficiency of the biofertilizer through nitrogen fixation and nutrient solubility in soils but Klebsiella again and Salmollena are potential health risks to end users. Further treatment of the digestate for more efficient destruction of pathogens is advised.
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Affiliation(s)
- H I Owamah
- Civil Engineering Department, Landmark University, P.M.B. 1001, Omu-Aran, Kwara State, Nigeria.
| | - S O Dahunsi
- Department of Biological Sciences, Landmark University, Omu-Aran, Kwara State, Nigeria
| | - U S Oranusi
- Department of Biological Sciences, Covenant University, Ota, Ogun State, Nigeria
| | - M I Alfa
- Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Kaduna State, Nigeria
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Sojobi AO, Owamah HI, Dahunsi SO. Comparative study of household water treatment in a rural community in Kwara state, Nigeria. Nig J Tech 2014. [DOI: 10.4314/njt.v33i1.18] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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