Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran

This study presents a sustainable waste management method through co-hydrothermal carbonization (Co-HTC) of undehydrated sewage sludge (SS) and fungus bran (FB), effectively eliminating the need for additional water. The effects of the reaction severity factor (SF: 0.1, 0.2, and 0.3), the FB mixed r...

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Main Authors: Guo, Shuai, Mu, Jiyou, Gao, Long, Ge, Liya, Lisak, Grzegorz
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/180796
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1807962024-10-28T01:51:11Z Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran Guo, Shuai Mu, Jiyou Gao, Long Ge, Liya Lisak, Grzegorz School of Civil and Environmental Engineering Residues and Resource Reclamation Centre Nanyang Environment and Water Research Institute Engineering Undehydrated sewage sludge Fungus bran This study presents a sustainable waste management method through co-hydrothermal carbonization (Co-HTC) of undehydrated sewage sludge (SS) and fungus bran (FB), effectively eliminating the need for additional water. The effects of the reaction severity factor (SF: 0.1, 0.2, and 0.3), the FB mixed ratio (FBMR: 0 %, 10 %, and 20 %), and the proportion of citric acid promoting agent (CAPA: 0 %, 10 %, and 20 %) on HTC performance were systematically investigated. The process was optimized for maximum energy yield (EY) using response surface methodology (RSM). The properties of the produced hydrochar, along with its EY and environmental impact, were thoroughly assessed. Results demonstrated that under optimal conditions (SF: 0.1, FBMR: 20 %, and CAPA: 20 %), EY increased by 45.84 % compared to hydrochar derived from dried SS. The dehydration and decarboxylation processes led to lower H/C and O/C ratios, producing hydrochar with reduced sulfur and nitrogen content, while the contents of alkali and alkaline earth metals, particularly calcium, increased. Furthermore, the optimized Co-HTC process had minimal environmental impact. In contrast to traditional HTC, which requires significant freshwater and involves high costs for SS drying, our innovative approach using undehydrated SS offers a cost-effective and environmentally friendly solution, paving the way for industrial-scale Co-HTC and sustainable waste valorization. Agency for Science, Technology and Research (A*STAR) National Research Foundation (NRF) Public Utilities Board (PUB) This work was financially supported by the Natural Science Foundation of Jilin Province (Grant No. YDZJ202201ZYTS394), and Agency for Science, Technology and Research (A*STAR) under Industry Alignment Fund – Industry Collaboration Project [Project Reference No.: I2101E0006]. This research was also supported by the National Research Foundation, Singapore, and PUB, Singapore’s National Water Agency under its RIE2025 Urban Solutions and Sustainability (USS) (Water) Centre of Excellence (CoE) Programme which provides funding to the Nanyang Environment & Water Research Institute (NEWRI) of the Nanyang Technological University, Singapore (NTU). Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of National Research Foundation, Singapore and PUB, Singapore’s National Water Agency. 2024-10-28T01:51:11Z 2024-10-28T01:51:11Z 2024 Journal Article Guo, S., Mu, J., Gao, L., Ge, L. & Lisak, G. (2024). Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran. Journal of Environmental Chemical Engineering, 12(5), 114051-. https://dx.doi.org/10.1016/j.jece.2024.114051 2213-2929 https://hdl.handle.net/10356/180796 10.1016/j.jece.2024.114051 2-s2.0-85203262347 5 12 114051 en I2101E0006 Journal of Environmental Chemical Engineering © 2024 Published by Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Undehydrated sewage sludge
Fungus bran
spellingShingle Engineering
Undehydrated sewage sludge
Fungus bran
Guo, Shuai
Mu, Jiyou
Gao, Long
Ge, Liya
Lisak, Grzegorz
Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran
description This study presents a sustainable waste management method through co-hydrothermal carbonization (Co-HTC) of undehydrated sewage sludge (SS) and fungus bran (FB), effectively eliminating the need for additional water. The effects of the reaction severity factor (SF: 0.1, 0.2, and 0.3), the FB mixed ratio (FBMR: 0 %, 10 %, and 20 %), and the proportion of citric acid promoting agent (CAPA: 0 %, 10 %, and 20 %) on HTC performance were systematically investigated. The process was optimized for maximum energy yield (EY) using response surface methodology (RSM). The properties of the produced hydrochar, along with its EY and environmental impact, were thoroughly assessed. Results demonstrated that under optimal conditions (SF: 0.1, FBMR: 20 %, and CAPA: 20 %), EY increased by 45.84 % compared to hydrochar derived from dried SS. The dehydration and decarboxylation processes led to lower H/C and O/C ratios, producing hydrochar with reduced sulfur and nitrogen content, while the contents of alkali and alkaline earth metals, particularly calcium, increased. Furthermore, the optimized Co-HTC process had minimal environmental impact. In contrast to traditional HTC, which requires significant freshwater and involves high costs for SS drying, our innovative approach using undehydrated SS offers a cost-effective and environmentally friendly solution, paving the way for industrial-scale Co-HTC and sustainable waste valorization.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Guo, Shuai
Mu, Jiyou
Gao, Long
Ge, Liya
Lisak, Grzegorz
format Article
author Guo, Shuai
Mu, Jiyou
Gao, Long
Ge, Liya
Lisak, Grzegorz
author_sort Guo, Shuai
title Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran
title_short Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran
title_full Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran
title_fullStr Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran
title_full_unstemmed Enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran
title_sort enhancing energy yield and reducing environmental impact through co-hydrothermal carbonization of undehydrated sewage sludge and fungus bran
publishDate 2024
url https://hdl.handle.net/10356/180796
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