Anaerobic treatment of opaque beer wastewater with enhanced biogas recovery through Acti-zyme bio augmentation
- Manyuchi, M. M., Mbohwa, Charles, Muzenda, E.
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2018
- Subjects: Bio augmentation , Biogas , BOD/COD
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/285563 , uj:30884 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2018. Anaerobic treatment of opaque beer wastewater with enhanced biogas recovery through Acti-zyme bio augmentation. South African Journal of Chemical Engineering, 26:74-79. , Link to Published Version: https://doi.org/10.1016/j.sajce.2018.10.002
- Description: Abstract: This study investigates the potentially of biologically treating opaque beer wastewater using the bio augmentation technology at the same time harnessing biogas and bio solids as value added products. Wastewater sample were collected in 5L containers and the sludge was separated from the liquid. The liquid and sludge were bio augmented with Acti-zyme with loadings of 5 g/L, 10 g/L and 15 g/L and were left to settle over a period of 30 days under anaerobic conditions. The wastewater and treated effluent BOD, COD, TKN, TP, TSS, TDS and pH were measured using standard methods. Whereas the amount of biogas generated was measured using the water displacement and its composition quantified. The BOD, COD, TKN, TP, TSS, TDS were significantly reduced by 93%, 77%, 87%, 89%, 90% and 90% respectively. The BOD/COD ratio was 0.72 initially and reduced to 0.21 for all the Acti-zyme loadings. Biogas with a methane composition of 65–70% was recovered.
- Full Text:
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2018
- Subjects: Bio augmentation , Biogas , BOD/COD
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/285563 , uj:30884 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2018. Anaerobic treatment of opaque beer wastewater with enhanced biogas recovery through Acti-zyme bio augmentation. South African Journal of Chemical Engineering, 26:74-79. , Link to Published Version: https://doi.org/10.1016/j.sajce.2018.10.002
- Description: Abstract: This study investigates the potentially of biologically treating opaque beer wastewater using the bio augmentation technology at the same time harnessing biogas and bio solids as value added products. Wastewater sample were collected in 5L containers and the sludge was separated from the liquid. The liquid and sludge were bio augmented with Acti-zyme with loadings of 5 g/L, 10 g/L and 15 g/L and were left to settle over a period of 30 days under anaerobic conditions. The wastewater and treated effluent BOD, COD, TKN, TP, TSS, TDS and pH were measured using standard methods. Whereas the amount of biogas generated was measured using the water displacement and its composition quantified. The BOD, COD, TKN, TP, TSS, TDS were significantly reduced by 93%, 77%, 87%, 89%, 90% and 90% respectively. The BOD/COD ratio was 0.72 initially and reduced to 0.21 for all the Acti-zyme loadings. Biogas with a methane composition of 65–70% was recovered.
- Full Text:
Bio ethanol from sewage sludge: A bio fuel alternative
- Manyuchi, M. M., Chiutsi, P., Mbohwa, Charles, Muzenda, E., Mutusva, T.
- Authors: Manyuchi, M. M. , Chiutsi, P. , Mbohwa, Charles , Muzenda, E. , Mutusva, T.
- Date: 2018
- Subjects: Bio ethanol , Biomass , Hydrolysis
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/267396 , uj:28365 , Citation: Manyuchi, M.M. 2018. Bio ethanol from sewage sludge: A bio fuel alternative. South African Journal of Chemical Engineering, 25:123-127. https://doi.org/10.1016/j.sajce.2018.04.003. , ISSN: 1026-9185
- Description: Abstract: In this study, the potential to fully exploit sewage sludge as a raw material for bio ethanol a source of bio fuel is investigated. Sewage sludge hydrolysate was first made by introducing Bacillus flexus in order for saccharification to take place before fermenting to bio ethanol using yeast. The hydrolysate was then prepared for fermentation by introducing 10 g/L of peptone, 2 g/L of KH2PO4 and 1 g/L of MgSO4. Af- terwards, fermentation was allowed to take place at varying pH (4.0e7.0), temperature (15e45 o C), in- cubation time (10e70 h) and yeast concentrations (2e10% (v/v). Bio ethanol concentrations were characterized through spectrophotometry and its physicochemical properties analyzed by standard methods. Pearson Correlations Coefficients in MATLAB 13.0 were used to determine the coefficients of interaction between the various parameters in bio ethanol production at 95% confidence interval. Highest bio ethanol yields of greater than 40 mL/L were achieved at an incubation period of 10 days, with an operating temperature of 30 o C and pH of 6.5 with yeast concentration of 6% wt. The interactions between incubation temperature and pH had the best interaction coefficient of 0.9759 being achieved for optimal bio ethanol yield. The bio ethanol produced had a flash point of 19.2 o C, pour point of 4.9 o C, cloud point of 20 o C and viscosity of 1.30 cP.
- Full Text:
- Authors: Manyuchi, M. M. , Chiutsi, P. , Mbohwa, Charles , Muzenda, E. , Mutusva, T.
- Date: 2018
- Subjects: Bio ethanol , Biomass , Hydrolysis
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/267396 , uj:28365 , Citation: Manyuchi, M.M. 2018. Bio ethanol from sewage sludge: A bio fuel alternative. South African Journal of Chemical Engineering, 25:123-127. https://doi.org/10.1016/j.sajce.2018.04.003. , ISSN: 1026-9185
- Description: Abstract: In this study, the potential to fully exploit sewage sludge as a raw material for bio ethanol a source of bio fuel is investigated. Sewage sludge hydrolysate was first made by introducing Bacillus flexus in order for saccharification to take place before fermenting to bio ethanol using yeast. The hydrolysate was then prepared for fermentation by introducing 10 g/L of peptone, 2 g/L of KH2PO4 and 1 g/L of MgSO4. Af- terwards, fermentation was allowed to take place at varying pH (4.0e7.0), temperature (15e45 o C), in- cubation time (10e70 h) and yeast concentrations (2e10% (v/v). Bio ethanol concentrations were characterized through spectrophotometry and its physicochemical properties analyzed by standard methods. Pearson Correlations Coefficients in MATLAB 13.0 were used to determine the coefficients of interaction between the various parameters in bio ethanol production at 95% confidence interval. Highest bio ethanol yields of greater than 40 mL/L were achieved at an incubation period of 10 days, with an operating temperature of 30 o C and pH of 6.5 with yeast concentration of 6% wt. The interactions between incubation temperature and pH had the best interaction coefficient of 0.9759 being achieved for optimal bio ethanol yield. The bio ethanol produced had a flash point of 19.2 o C, pour point of 4.9 o C, cloud point of 20 o C and viscosity of 1.30 cP.
- Full Text:
Biological treatment of distillery wastewater by application of the vermifiltration technology
- Manyuchi, M. M., Mbohwa, Charles, Muzenda, E.
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2018
- Subjects: Distillery effluent , Eisenia Fetida , BOD
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/267389 , uj:28364 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2018. Biological treatment of distillery wastewater by application of the vermifiltration technology. South African Journal of Chemical Engineering (2018), doi: 10.1016/j.sajce.2017.12.002.
- Description: Abstract: In this study distillery wastewater was treated using the vermifiltration technology in a bid to reduce downstream contamination by the effluent. 10kg of Eisenia Fetida earthworms were used as the vermifiltration media in a 0.5m x 0.5m x 0.3m vermifiltration bed over a 40 hour period cycle. The distillery effluent physicochemical parameters which included pH, total Kjeldahl nitrogen (TKN), biological oxygen demand (BOD), total dissolved solids (TDS), total suspended solids (TSS) and the chemical oxygen demand (COD) were measured every 5 days. The vermicompost which was produced as a result of the vermifiltration process’s nitrogen, phosphorous and potassium composition was also determined. The distillery effluent pH changed from acidic to neutral whilst a decrease of 94.9% was observed for the TKN, 91.1% for the BOD, 91.9% for the TDS, 92.4% for the TSS and 89.4% for the COD upon treatment with vermifiltration. The vermicompost, a by-product of the vermifiltration process had a nitrogen, phosphorous and potassium composition of 1.87%, 0.87% and 0.66% respectively.
- Full Text:
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2018
- Subjects: Distillery effluent , Eisenia Fetida , BOD
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/267389 , uj:28364 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2018. Biological treatment of distillery wastewater by application of the vermifiltration technology. South African Journal of Chemical Engineering (2018), doi: 10.1016/j.sajce.2017.12.002.
- Description: Abstract: In this study distillery wastewater was treated using the vermifiltration technology in a bid to reduce downstream contamination by the effluent. 10kg of Eisenia Fetida earthworms were used as the vermifiltration media in a 0.5m x 0.5m x 0.3m vermifiltration bed over a 40 hour period cycle. The distillery effluent physicochemical parameters which included pH, total Kjeldahl nitrogen (TKN), biological oxygen demand (BOD), total dissolved solids (TDS), total suspended solids (TSS) and the chemical oxygen demand (COD) were measured every 5 days. The vermicompost which was produced as a result of the vermifiltration process’s nitrogen, phosphorous and potassium composition was also determined. The distillery effluent pH changed from acidic to neutral whilst a decrease of 94.9% was observed for the TKN, 91.1% for the BOD, 91.9% for the TDS, 92.4% for the TSS and 89.4% for the COD upon treatment with vermifiltration. The vermicompost, a by-product of the vermifiltration process had a nitrogen, phosphorous and potassium composition of 1.87%, 0.87% and 0.66% respectively.
- Full Text:
Value addition of coal fines and sawdust to briquettes using molasses as a binder
- Manyuchi, M. M., Mbohwa, Charles, Muzenda, E.
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2018
- Subjects: Binder , Calorific value , Coal fines
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/280296 , uj:30116 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2018. Value addition of coal fines and sawdust to briquettes using molasses as a binder. South African Journal of Chemical Engineering, 26:70-73. https://doi.org/10.1016/j.sajce.2018.09.004
- Description: Abstract: In this study, the co-briquetting of coal fines saw dust and molasses as a binder is explored as an option for value addition of the wastes generated in the various industries. The effect of the saw dust concentration and the molasses concentration was investigated through measuring the briquette's calorific value, fixed carbon, compressive strength and shatter index. Addition of Ca(OH)2 was done to effect removal of sulphur from the briquette. Measurements of the briquettes physicochemical properties such as moisture content, ash content and sulphur content were measured using the standard methods. As the saw dust and the molasses concentration increased, the calorific value, fixed carbon and compressive strength increased by 16%, 8% and 50% respectively. Whereas, the shatter index decreased by 146% as the saw dust and the molasses concentration increased in relation to the coal fines. Addition of the saw dust and the molasses are therefore critical in the production of a high quality coal-saw dust-molasses briquette which does not shatter.
- Full Text:
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2018
- Subjects: Binder , Calorific value , Coal fines
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/280296 , uj:30116 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2018. Value addition of coal fines and sawdust to briquettes using molasses as a binder. South African Journal of Chemical Engineering, 26:70-73. https://doi.org/10.1016/j.sajce.2018.09.004
- Description: Abstract: In this study, the co-briquetting of coal fines saw dust and molasses as a binder is explored as an option for value addition of the wastes generated in the various industries. The effect of the saw dust concentration and the molasses concentration was investigated through measuring the briquette's calorific value, fixed carbon, compressive strength and shatter index. Addition of Ca(OH)2 was done to effect removal of sulphur from the briquette. Measurements of the briquettes physicochemical properties such as moisture content, ash content and sulphur content were measured using the standard methods. As the saw dust and the molasses concentration increased, the calorific value, fixed carbon and compressive strength increased by 16%, 8% and 50% respectively. Whereas, the shatter index decreased by 146% as the saw dust and the molasses concentration increased in relation to the coal fines. Addition of the saw dust and the molasses are therefore critical in the production of a high quality coal-saw dust-molasses briquette which does not shatter.
- Full Text:
Biological treatment of distillery wastewater by application of the vermifiltration technology
- Manyuchi, M. M., Mbohwa, Charles, Muzenda, E.
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2017
- Subjects: Distillery effluent , Eisenia Fetida , BOD
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/259500 , uj:27305 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2017. Biological treatment of distillery wastewater by application of the vermifiltration technology.
- Description: Abstract: In this study distillery wastewater was treated using the vermifiltration technology in a bid to reduce downstream contamination by the effluent. 10kg of Eisenia Fetida earthworms were used as the vermifiltration media in a 0.5m x 0.5m x 0.3m vermifiltration bed over a 40 hour period cycle. The distillery effluent physicochemical parameters which included pH, total Kjeldahl nitrogen (TKN), biological oxygen demand (BOD), total dissolved solids (TDS), total suspended solids (TSS) and the chemical oxygen demand (COD) were measured every 5 days. The vermicompost which was produced as a result of the vermifiltration process’s nitrogen, phosphorous and potassium composition was also determined. The distillery effluent pH changed from acidic to neutral whilst a decrease of 94.9% was observed for the TKN, 91.1% for the BOD, 91.9% for the TDS, 92.4% for the TSS and 89.4% for the COD upon treatment with vermifiltration. The vermicompost, a by-product of the vermifiltration process had a nitrogen, phosphorous and potassium composition of 1.87%, 0.87% and 0.66% respectively.
- Full Text:
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2017
- Subjects: Distillery effluent , Eisenia Fetida , BOD
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/259500 , uj:27305 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2017. Biological treatment of distillery wastewater by application of the vermifiltration technology.
- Description: Abstract: In this study distillery wastewater was treated using the vermifiltration technology in a bid to reduce downstream contamination by the effluent. 10kg of Eisenia Fetida earthworms were used as the vermifiltration media in a 0.5m x 0.5m x 0.3m vermifiltration bed over a 40 hour period cycle. The distillery effluent physicochemical parameters which included pH, total Kjeldahl nitrogen (TKN), biological oxygen demand (BOD), total dissolved solids (TDS), total suspended solids (TSS) and the chemical oxygen demand (COD) were measured every 5 days. The vermicompost which was produced as a result of the vermifiltration process’s nitrogen, phosphorous and potassium composition was also determined. The distillery effluent pH changed from acidic to neutral whilst a decrease of 94.9% was observed for the TKN, 91.1% for the BOD, 91.9% for the TDS, 92.4% for the TSS and 89.4% for the COD upon treatment with vermifiltration. The vermicompost, a by-product of the vermifiltration process had a nitrogen, phosphorous and potassium composition of 1.87%, 0.87% and 0.66% respectively.
- Full Text:
Resource recovery from municipal waste and bio solids (digestate) through vermicomposting: a waste management initiative
- Manyuchi, M. M., Mbohwa, Charles, Muzenda, E.
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2017
- Subjects: Bio waste , Bio solids , Municipal waste
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/259340 , uj:27284 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2017. Resource recovery from municipal waste and bio solids (digestate) through vermicomposting: a waste management initiative.
- Description: Abstract: In this study, municipal waste and anaerobic digestate (bio solids) were co-vermicomposted in a bid to properly manage waste at disposal sites. Municipal waste and bio solids in the ratio 2:1 were vermicomposted in a vermireactor for 45 days. Process parameters such as moisture, temperature and pH as well as the nutrient composition in terms of nitrogen, phosphorous and potassium (NPK) content of the vermicompost were closely monitored. Approximately 250 Eisenia Foetida, a species of the red worms was used as the vermicomposting inoculants. After the 45 days, a rich vermicompost with an NPK composition of 6.18%, 3.27% and 8.26% respectively. The optimum conditions for producing this vermicompost were moisture content>27%, temperature >18.6% and neutral pH. An addition of the bio solids to municipal waste during vermicomposting adds value to the nutritional composition of the vermicompost.
- Full Text:
- Authors: Manyuchi, M. M. , Mbohwa, Charles , Muzenda, E.
- Date: 2017
- Subjects: Bio waste , Bio solids , Municipal waste
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/259340 , uj:27284 , Citation: Manyuchi, M.M., Mbohwa, C. & Muzenda, E. 2017. Resource recovery from municipal waste and bio solids (digestate) through vermicomposting: a waste management initiative.
- Description: Abstract: In this study, municipal waste and anaerobic digestate (bio solids) were co-vermicomposted in a bid to properly manage waste at disposal sites. Municipal waste and bio solids in the ratio 2:1 were vermicomposted in a vermireactor for 45 days. Process parameters such as moisture, temperature and pH as well as the nutrient composition in terms of nitrogen, phosphorous and potassium (NPK) content of the vermicompost were closely monitored. Approximately 250 Eisenia Foetida, a species of the red worms was used as the vermicomposting inoculants. After the 45 days, a rich vermicompost with an NPK composition of 6.18%, 3.27% and 8.26% respectively. The optimum conditions for producing this vermicompost were moisture content>27%, temperature >18.6% and neutral pH. An addition of the bio solids to municipal waste during vermicomposting adds value to the nutritional composition of the vermicompost.
- Full Text:
- «
- ‹
- 1
- ›
- »