Journal of Guangxi Normal University(Natural Science Edition) ›› 2022, Vol. 40 ›› Issue (5): 406-417.doi: 10.16088/j.issn.1001-6600.2022022707

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Current Situation and Prospect of Low Carbon Treatment of Food Waste and Excess Sludge by Anaerobic Co-Digestion

WANG Yuchen1,2, SU Chengyuan1,2*, DING Fengxiu2, WANG Qing2, LI Xinjuan2, DENG Xue2   

  1. 1. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Guangxi Normal University), Ministry of Education, Guilin Guangxi 541006, China;
    2. School of Environment and Resources, Guangxi Normal University, Guilin Guangxi 541006, China
  • Received:2022-02-27 Revised:2022-04-13 Online:2022-09-25 Published:2022-10-18

Abstract: As an important part of municipal solid waste, the outputof food wasteis increasing with the acceleration of urbanization in China. Meanwhile, the construction and upgrading of sewage treatment plants have increased the production of excess sludge. Therefore, the effective treatment of food waste and excess sludge has attracted extensive attention. Firstly, the effects and mechanisms of inhibitory substances such as lipid, ammonia, salt, capsaicin, microplastic and antibiotics on the stability of the anaerobic co-digestion of food waste and excess sludge were expounded. Secondly, it was proposed that the inhibitory substances could be removed by physical, chemical and biological pretreatment methods, and the appropriate amount of biochar, zero-valent iron and other strengthening substances should be added to improve the efficiency and stability of anaerobic co-digestion. The coupling technology combining microbial fuel cell, microbial electrolysis carbon capture, pyrolysis, microalgae with anaerobic co-digestion technology in the treatment of food waste and excess sludge was summarized. The purpose is to reduce the carbon emission in the treatment process of food waste and excess sludge, and finally realize the green and low-carbon treatment.

Key words: food waste, excess sludge, anaerobic co-digestion, strengthening measures, carbon emission reduction

CLC Number: 

  • X703.1
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