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Anaerobic Co-Digestion with Food Waste: A Possible Alternative to Overcome the Energy Deficit of Sludge Thermal Pretreatment

[Image: see text] Thermal pretreatment (TP) was an effective method to improve the anaerobic digestion of waste-activated sludge. In order to balance the energy consumption of sludge TP integrated with anaerobic digestion, food waste was introduced as a co-substrate to achieve an energy self-sustain...

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Autores principales: Liu, Yang, Zong, Yifeng, Xie, Tian, Song, Hainong, Zhang, Jian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9631406/
https://www.ncbi.nlm.nih.gov/pubmed/36340169
http://dx.doi.org/10.1021/acsomega.2c03700
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author Liu, Yang
Zong, Yifeng
Xie, Tian
Song, Hainong
Zhang, Jian
author_facet Liu, Yang
Zong, Yifeng
Xie, Tian
Song, Hainong
Zhang, Jian
author_sort Liu, Yang
collection PubMed
description [Image: see text] Thermal pretreatment (TP) was an effective method to improve the anaerobic digestion of waste-activated sludge. In order to balance the energy consumption of sludge TP integrated with anaerobic digestion, food waste was introduced as a co-substrate to achieve an energy self-sustainable sludge treatment system. An anaerobic biodegradability test was performed using thermal pretreated sludge and food waste in order to clarify the kinetics and mechanism of co-digestion, especially the synergetic effect on specific methane yield. The prominent synergetic effect was an initial acceleration of cumulative methane production by 20.7–23.8% observed during the first 15 days. The modified Gompertz model presented a better agreement of the experimental results, and it was a suitable tool for methane production prediction of mono- and co-digestion. The energy assessment showed that co-digestion with food waste was a sustainable solution. When the moisture content of the TP sludge was 80–90%, the energy compensation required was about 0.04–0.22 t VS(Foodwaste)/t VS(Sludge), which could maintain the integration of neutral or even positive energy between TP and anaerobic digestion.
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spelling pubmed-96314062022-11-04 Anaerobic Co-Digestion with Food Waste: A Possible Alternative to Overcome the Energy Deficit of Sludge Thermal Pretreatment Liu, Yang Zong, Yifeng Xie, Tian Song, Hainong Zhang, Jian ACS Omega [Image: see text] Thermal pretreatment (TP) was an effective method to improve the anaerobic digestion of waste-activated sludge. In order to balance the energy consumption of sludge TP integrated with anaerobic digestion, food waste was introduced as a co-substrate to achieve an energy self-sustainable sludge treatment system. An anaerobic biodegradability test was performed using thermal pretreated sludge and food waste in order to clarify the kinetics and mechanism of co-digestion, especially the synergetic effect on specific methane yield. The prominent synergetic effect was an initial acceleration of cumulative methane production by 20.7–23.8% observed during the first 15 days. The modified Gompertz model presented a better agreement of the experimental results, and it was a suitable tool for methane production prediction of mono- and co-digestion. The energy assessment showed that co-digestion with food waste was a sustainable solution. When the moisture content of the TP sludge was 80–90%, the energy compensation required was about 0.04–0.22 t VS(Foodwaste)/t VS(Sludge), which could maintain the integration of neutral or even positive energy between TP and anaerobic digestion. American Chemical Society 2022-10-24 /pmc/articles/PMC9631406/ /pubmed/36340169 http://dx.doi.org/10.1021/acsomega.2c03700 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Liu, Yang
Zong, Yifeng
Xie, Tian
Song, Hainong
Zhang, Jian
Anaerobic Co-Digestion with Food Waste: A Possible Alternative to Overcome the Energy Deficit of Sludge Thermal Pretreatment
title Anaerobic Co-Digestion with Food Waste: A Possible Alternative to Overcome the Energy Deficit of Sludge Thermal Pretreatment
title_full Anaerobic Co-Digestion with Food Waste: A Possible Alternative to Overcome the Energy Deficit of Sludge Thermal Pretreatment
title_fullStr Anaerobic Co-Digestion with Food Waste: A Possible Alternative to Overcome the Energy Deficit of Sludge Thermal Pretreatment
title_full_unstemmed Anaerobic Co-Digestion with Food Waste: A Possible Alternative to Overcome the Energy Deficit of Sludge Thermal Pretreatment
title_short Anaerobic Co-Digestion with Food Waste: A Possible Alternative to Overcome the Energy Deficit of Sludge Thermal Pretreatment
title_sort anaerobic co-digestion with food waste: a possible alternative to overcome the energy deficit of sludge thermal pretreatment
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9631406/
https://www.ncbi.nlm.nih.gov/pubmed/36340169
http://dx.doi.org/10.1021/acsomega.2c03700
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