Methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor

Anaerobic digestion is a promising method for organic waste stabilization, including food waste and sewage sludge. Anaerobic digestion can be completed either in mono digestion or co-digestion, respectively; no longer limited to waste stabilisation method but also towards renewable energy product...

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主要作者: Sulaiman, Siti Mariam
格式: Thesis
語言:English
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English
出版: 2022
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spelling my-uthm-ep.83512023-02-20T07:24:18Z Methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor 2022-03 Sulaiman, Siti Mariam TD Environmental technology. Sanitary engineering Anaerobic digestion is a promising method for organic waste stabilization, including food waste and sewage sludge. Anaerobic digestion can be completed either in mono digestion or co-digestion, respectively; no longer limited to waste stabilisation method but also towards renewable energy production in the form of methane. The cosubstrate, a mixture of two or more organic waste, was used as a substrate in anaerobic co-digestion. The effect on co-digestion of municipal sewage sludge and food waste has been reported previously. However, there is less information on the digestibility of co-substrate, specifically a mixture of domestic sewage sludge and food waste. Hence, this study was conducted to examine the characteristics of the mixture of domestic sewage sludge and food waste, to compare the methane yield from a batch test of mesophilic anaerobic co-digestion and to determine the best fit between laboratory and modelling analysis of methane kinetics. Two sets of batch biochemical methane potential (BMP) test were conducted using Automatic Methane Potential Test System (AMPTS II); each for digestion of co-substrate; 1) a mixture of primary sewage sludge and food waste (PSS+FW) and 2) a mixture of secondary sewage sludge and food waste (SSS+FW). The results showed that the addition of food waste to domestic sewage sludge improved volatile solids to total solids (VS/TS) ratio. Between two co-substrates, PSS+FW showed better digestibility shown by 530.4mL methane accumulated, ultimate methane yield of 1233.57 mL CH4/g VS and methane production rate of 625.18 CH4/gVS day. Modified Gompertz modelling found fit well to the laboratory data indicatedby R2 of 0.997. In conclusion, co-digestion improved the synergy effect between organic substrates, indicated by improved volatile solid, VS to total solid, TS (VS/TS) ratio; and increased the efficiency of the anaerobic process shown by high methane production at early stage of the digestion inline with no lag phase. 2022-03 Thesis http://eprints.uthm.edu.my/8351/ http://eprints.uthm.edu.my/8351/1/24p%20SITI%20MARIAM%20SULAIMAN.pdf text en public http://eprints.uthm.edu.my/8351/2/SITI%20MARIAM%20SULAIMAN%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/8351/3/SITI%20MARIAM%20SULAIMAN%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Fakulti Sains Gunaan dan Teknologi
institution Universiti Tun Hussein Onn Malaysia
collection UTHM Institutional Repository
language English
English
English
topic TD Environmental technology
Sanitary engineering
spellingShingle TD Environmental technology
Sanitary engineering
Sulaiman, Siti Mariam
Methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor
description Anaerobic digestion is a promising method for organic waste stabilization, including food waste and sewage sludge. Anaerobic digestion can be completed either in mono digestion or co-digestion, respectively; no longer limited to waste stabilisation method but also towards renewable energy production in the form of methane. The cosubstrate, a mixture of two or more organic waste, was used as a substrate in anaerobic co-digestion. The effect on co-digestion of municipal sewage sludge and food waste has been reported previously. However, there is less information on the digestibility of co-substrate, specifically a mixture of domestic sewage sludge and food waste. Hence, this study was conducted to examine the characteristics of the mixture of domestic sewage sludge and food waste, to compare the methane yield from a batch test of mesophilic anaerobic co-digestion and to determine the best fit between laboratory and modelling analysis of methane kinetics. Two sets of batch biochemical methane potential (BMP) test were conducted using Automatic Methane Potential Test System (AMPTS II); each for digestion of co-substrate; 1) a mixture of primary sewage sludge and food waste (PSS+FW) and 2) a mixture of secondary sewage sludge and food waste (SSS+FW). The results showed that the addition of food waste to domestic sewage sludge improved volatile solids to total solids (VS/TS) ratio. Between two co-substrates, PSS+FW showed better digestibility shown by 530.4mL methane accumulated, ultimate methane yield of 1233.57 mL CH4/g VS and methane production rate of 625.18 CH4/gVS day. Modified Gompertz modelling found fit well to the laboratory data indicatedby R2 of 0.997. In conclusion, co-digestion improved the synergy effect between organic substrates, indicated by improved volatile solid, VS to total solid, TS (VS/TS) ratio; and increased the efficiency of the anaerobic process shown by high methane production at early stage of the digestion inline with no lag phase.
format Thesis
qualification_name Master of Philosophy (M.Phil.)
qualification_level Master's degree
author Sulaiman, Siti Mariam
author_facet Sulaiman, Siti Mariam
author_sort Sulaiman, Siti Mariam
title Methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor
title_short Methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor
title_full Methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor
title_fullStr Methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor
title_full_unstemmed Methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor
title_sort methane potential from anaerobic co-digestion of sewage sludge and food waste in a stirred batch reactor
granting_institution Universiti Tun Hussein Onn Malaysia
granting_department Fakulti Sains Gunaan dan Teknologi
publishDate 2022
url http://eprints.uthm.edu.my/8351/1/24p%20SITI%20MARIAM%20SULAIMAN.pdf
http://eprints.uthm.edu.my/8351/2/SITI%20MARIAM%20SULAIMAN%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/8351/3/SITI%20MARIAM%20SULAIMAN%20WATERMARK.pdf
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