Optimization of Biogas Production from sewage sludge
- Authors: Belaid, Mohamed , Matheri, Anthony Njuguna , Lelosa, Itumeleng Constance , Muzenda, Edison , Ramatsa, Ishmael
- Date: 2019
- Subjects: Anaerobic digestion , Co-digestion , Mesophilic temperature
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/403887 , uj:33862 , Citation: Belaid, M. et al. 2019. Optimization of Biogas Production from sewage sludge.
- Description: Abstract: It is widely known that the degradation of waste activated sludge is a slow process with a low extent of degradation. Improvement methods with regards to bio-methane yield were investigated in this study using a laboratory batch anaerobic digester. Mono-digestion of sludge with a C: N ratio of 15.47 resulted in a lower accumulation of gas volume than co-digested sludge even though the pH decreased rapidly in both cases. The thermophillic anaerobic digestion of sludge and co-digested sludge also produced higher bio-methane yield than mesophillic digestion of waste water sludge. Gas accumulation volume in the digesters during thermophillic digestion increased from 50 Nml to 100 Nml, 200 Nml to 600 Nml and 600 Nml to 750 Nml for sludge, cow dung and sludge and sludge and food waste respectively as the temperature was increased from 37o C to 45o C.
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Biochemical methane potential analysis using cow dung, chicken manure and pig manure under mesophilic conditions
- Authors: Belaid, Mohamed , Matheri, Anthony Njuguna , Mdluli, Nomkhosi Princess , Muzenda, Edison
- Date: 2019
- Subjects: Anaerobic digestion , Mono-digestion , Co-digestion
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/403895 , uj:33863 , Citation: Belaid, M. et al. 2019. Biochemical methane potential analysis using cow dung, chicken manure and pig manure under mesophilic conditions.
- Description: Abstract: In this study, we compared methane production by anaerobic mono-digestion and co-digestion of cow dung, chicken manure and pig manure under mesophilic conditions at the temperature of 37 0 C using a ratio of 1:1. C/N ratio, pH, VS/TS and sulphur content were the parameters investigated. Results indicated that co-digesting of cow dung; pig manure and chicken manure enhanced biogas production and methane content. The results also imply that pig manure cannot be used alone to produce methane as it produced low methane. Chicken manure produced more on the first day (272 Nml) compared to pig manure (257.4 Nml) and cow dung (80.5 Nml). On the ninth day, chicken produced 884 .9 Nml and then on the tenth day it went up again to 1095.6 Nml, reached its peak on day 13 and stopped, chicken yielded better results compared to the cow dung and pig manure because chicken had a higher VS/TS percent which is desirable for methane production. Pig manure started producing methane on the first day which was 257.4 Nml and stopped on the second day with the volume of 262.3 Nml. Pig manure showed poor results compared to cow dung and chicken manure.
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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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Analysis of the biogas productivity from dry anaerobic digestion of organic fraction of municipal solid waste
- Authors: Matheri, Anthony Njuguna , Sethunya, Vuiswa Lucia , Belaid, Mohamed , Muzenda, Edison , Ntuli, Freeman
- Date: 2017
- Subjects: BMP , Biodegradable , Co-digestion
- Language: English
- Type: Article
- Identifier: http://ujcontent.uj.ac.za8080/10210/380169 , http://hdl.handle.net/10210/241025 , uj:24804 , Citation: Matheri, A.N. 2017. Analysis of the biogas productivity from dry anaerobic digestion of organic fraction of municipal solid waste.
- Description: Abstract: In this study, it was observed that in experimental work under laboratory scale using conventional biomethane potential (BMP) analyser under the mesophilic optimum temperature of 37 0C and pH of 7. Organic fraction municipality solid waste (OFMSW) inoculated with cow manure had higher biodegradability rate leading to high methane production under shorter hydraulic retention rate. The co-digestion of OFMSW and cow manure stabilises conditions in digestion process such as carbon to nitrogen (C: N) ratio in the substrate mixtures as well as macro and micronutrients, pH, inhibitors or toxic compounds, dry matter and thus increasing methane production. It was concluded that the organic waste generated in the municipality co-digested with manures to produce methane can be used as a source of sustainable renewable energy.
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