Optimization of biomethane production by anaerobic co-digestion of food waste with cow dung
- Authors: Empompo, Jonathan Bambokela , Mayala, Glodi Niangi , Matheri, Anthony Njuguna , Muzenda, Edison , Belaid, Mohammed
- Date: 2017
- Subjects: Anaerobic co-digestion , Anaerobic monodigestion , Biomethane
- Language: English
- Type: Conference proceedings
- Identifier: http://ujcontent.uj.ac.za8080/10210/364987 , http://hdl.handle.net/10210/250680 , uj:26127 , Citation: Empompo, J.B. et al. 2017. Optimization of biomethane production by anaerobic co-digestion of food waste with cow dung. 2nd International Engineering Conference (IEC 2017) Federal University of Technology, Minna, Nigeria.
- Description: Abstract: The world today is in a constant quest of generating clean energy which would considerably reduce the emission of greenhouse gas (GHG) for better living conditions. In this study, a comparative analysis between anaerobic mono-digestion and anaerobic co-digestion of food waste (FW) was conducted based on the following parameters; pH, carbon to nitrogen (C/N) ratio, total solids (TS) and volatile solids (VS) content. For anaerobic monodigestion FW alone was used as the substrate while for anaerobic co-digestion, two mixing ratios of FW with cow dung were used (2:1 and 1:2 respectively). Three digesters of 500 ml were used and placed into a water bath at 45°C through a Biochemical Methane Potential (BMP) Test using the Automatic Methane Potential Test System II (AMPTS II). The anaerobic mono-digestion of FW yielded 405.1 Nml of biomethane while the anaerobic co-digestion of FW with cow dung yielded 267.4 and 274.8 Nml at 2:1 and 1:2 mixing ratios correspondingly. The anaerobic co-digestion showed a significant decrease in the specific biogas production by 32.16 to 33.99% in comparison to anaerobic monodigestion. It was observed that the pH (7.21), C/N (31.41), TS (14.64%) and VS/TS (94.4%) of anaerobic mono-digestion of FW fell approximately and within their respective optimum range, 6.5 – 7.5, 15 – 30, 15 – 20% and 82.4 – 95.3%. Hence, it produced the best biomethane yield. The objective of this study was to prove that anaerobic co-digestion of FW with cow dung would produce an improved biogas yield as compared to anaerobic monodigestion.
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Impact of Co-digesting food waste with cow dung
- Authors: Empompo, Jonathan Bambokela , Niangi, Glodi Mayala , Matheri, Anthony Njuguna , Muzenda, Edison , Belaid, Mohammed
- Date: 2017
- Subjects: Co-digestion , Cow dung , Food waste
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/250718 , uj:26131 , Citation: Empompo, J.B. et al. 2017. Impact of Co-digesting food waste with cow dung. 2nd International Engineering Conference (IEC 2017) Federal University of Technology, Minna, Nigeria.
- Description: Abstract: Producing energy from fossil fuels has created unliveable conditions. Climate change for instance, is one of the most environmental issue of our time. Renewable energy, clean source of energy, is considered as an essential part of the remedy. In this study, we investigated the production of biomethane via anaerobic monodigestion of food waste (FW) and co-digestion of FW with cow dung. The digestion took place under thermophilic conditions at 45˚C. A comparative analysis was done on the biogas yield of both mono and co-digestion. FW, FW and cow dung of the ratios, 2:1 and 1:2 were used as the substrates in the digestion. The anaerobic monodigestion of FW displayed the highest biomethane yield produced, of 405.1 Nml. Two main parameters helped in achieving that, volatile solids content (VS) and total solids content (TS). In addition to the two parameters, the pH and the C/N ratio helped in enhancing the biomethane production of both mono and co-digestion. As the objective is the optimization of the biomethane yield by co-digestion, co-digesting FW with cow dung resulted in decreasing considerably the biomethane yield by 32.16 to 33.99%.
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Evaluation of polymeric membranes efficacy for the water filtration system prototype
- Authors: Empompo, Jonathan Bambokela , Muzenda, Edison , Belaid, Mohammed , Matheri, Anthony Njuguna
- Date: 2017
- Subjects: efficiency , filtration , membranes
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/250294 , uj:26078 , Citation: Empompo, J.B. et al. 2017. Evaluation of polymeric membranes efficacy for the water filtration system prototype. 2nd International Engineering Conference (IEC 2017) Federal University of Technology, Minna, Nigeria.
- Description: Abstract: The issue of potable water in the poorest region of the world has never been a conceptual issue only but a financial and technical issue as well. This study aimed at evaluating the efficiency of four polymeric membranes by predicting their performance in terms of particle separation, permeability and mechanical strength. These membranes are to be placed in the purification section of a Water Filtration System (WFS) to obtain pure or non-turbid water for human consumption. This study introduced a microfiltration set-up connected to a solar power system as the beacon of hope for poorest regions of the world in order to eradicate the limited access to potable water.
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The kinetic of biogas rate from cow dung and grass clippings
- Authors: Matheri, Anthony Njuguna , Belaid, Mohammed , Seodigeng, Tumisang , Ngila, Catherine Jane
- Date: 2016
- Subjects: Anaerobic digestion , Kinetic models , Modified Gompertz
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/91512 , uj:20110 , Citation: Matheri, A.N. et al. 2016. The kinetic of biogas rate from cow dung and grass clippings.
- Description: Abstract:In this study, we investigated the use of laboratory batch anaerobic digester to derive kinetics parameters for anaerobic co-digestion of cow dung and grass clippings. The Carbon/Nitrogen (C/N) ratio of cow dung was found to be 17.17 and grass clippings to be 20.54. Through co-digestion, the C/N ratio settled at 19.08. Laboratory experimental data from 10 litres batch anaerobic digester operating at mesophilic temperature of 37 0C and pH of 6.9 was used to derive parameters for Modified Gompertz model. The actual biogas yield was found to be 4370 ml/g COD. In the model of biogas production prediction, the kinetics constants of A (ml/g COD), μ (ml/g COD. day), λ (day) were 4319.20, 939.71, 1.91 respectively with coefficient of determination (R2) of 0.996.
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