Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition
The hydrolysis as an essential step in anaerobic digestion has been commonly evaluated according to the extent of soluble chemical oxygen demand (SCOD) released from biosolids. However, little information is currently available for the effect of chemical compositions of SCOD on anaerobic digestion....
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/141255 |
| _version_ | 1811685188369907712 |
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| author | Ma, Yingqun Gu, Jun Liu, Yu |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Ma, Yingqun Gu, Jun Liu, Yu |
| author_sort | Ma, Yingqun |
| collection | NTU |
| description | The hydrolysis as an essential step in anaerobic digestion has been commonly evaluated according to the extent of soluble chemical oxygen demand (SCOD) released from biosolids. However, little information is currently available for the effect of chemical compositions of SCOD on anaerobic digestion. This study showed that the non-biodegradable, recalcitrant organics in SCOD released from food waste and waste activated sludge pretreated with fungal mash rich in various enzymes were accumulated with the prolonged hydrolysis, while the methane production was closely related to the chemical compositions of the feed. The analyses by excitation emission matrix and size exclusion chromatography-organic carbon detection-organic nitrogen detection clearly revealed that the biodegradability of SCOD and the performance of anaerobic digestion were both determined by the chemical compositions of SCOD. These in turn challenged the present practice with SCOD concentration as a sole indicator in the selection and optimization of the pretreatment methods of biosolids prior to anaerobic digestion. It is expected that this study can offer useful insights into future design, optimization and operation of anaerobic digestion system in consideration of both SCOD concentration and its chemical compositions. |
| first_indexed | 2024-10-01T04:40:33Z |
| format | Journal Article |
| id | ntu-10356/141255 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:40:33Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1412552020-06-05T05:31:09Z Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition Ma, Yingqun Gu, Jun Liu, Yu School of Civil and Environmental Engineering Advanced Environmental Biotechnology Centre Nanyang Environment and Water Research Institute Engineering::Civil engineering Anaerobic Digestion Soluble COD The hydrolysis as an essential step in anaerobic digestion has been commonly evaluated according to the extent of soluble chemical oxygen demand (SCOD) released from biosolids. However, little information is currently available for the effect of chemical compositions of SCOD on anaerobic digestion. This study showed that the non-biodegradable, recalcitrant organics in SCOD released from food waste and waste activated sludge pretreated with fungal mash rich in various enzymes were accumulated with the prolonged hydrolysis, while the methane production was closely related to the chemical compositions of the feed. The analyses by excitation emission matrix and size exclusion chromatography-organic carbon detection-organic nitrogen detection clearly revealed that the biodegradability of SCOD and the performance of anaerobic digestion were both determined by the chemical compositions of SCOD. These in turn challenged the present practice with SCOD concentration as a sole indicator in the selection and optimization of the pretreatment methods of biosolids prior to anaerobic digestion. It is expected that this study can offer useful insights into future design, optimization and operation of anaerobic digestion system in consideration of both SCOD concentration and its chemical compositions. 2020-06-05T05:31:09Z 2020-06-05T05:31:09Z 2018 Journal Article Ma, Y., Gu, J., & Liu, Y. (2018). Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition. Science of the total environment, 643, 21-27. doi:10.1016/j.scitotenv.2018.06.187 0048-9697 https://hdl.handle.net/10356/141255 10.1016/j.scitotenv.2018.06.187 29935360 2-s2.0-85048712584 643 21 27 en Science of the total environment © 2018 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Anaerobic Digestion Soluble COD Ma, Yingqun Gu, Jun Liu, Yu Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition |
| title | Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition |
| title_full | Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition |
| title_fullStr | Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition |
| title_full_unstemmed | Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition |
| title_short | Evaluation of anaerobic digestion of food waste and waste activated sludge : soluble COD versus its chemical composition |
| title_sort | evaluation of anaerobic digestion of food waste and waste activated sludge soluble cod versus its chemical composition |
| topic | Engineering::Civil engineering Anaerobic Digestion Soluble COD |
| url | https://hdl.handle.net/10356/141255 |
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