Effect of heat treatment on anaerobic fermentation of household kitchen waste for acid production

SHEN Pengfei; QIN Weikai; SONG Xiaofei; LI Yonggang; YANG Lulu; GAO Yuchen; JIANG Jianguo

doi:10.13205/j.hjgc.202510018

Volume 43 Issue 10

Oct. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(10): 162-172

SHEN Pengfei, QIN Weikai, SONG Xiaofei, LI Yonggang, YANG Lulu, GAO Yuchen, JIANG Jianguo. Effect of heat treatment on anaerobic fermentation of household kitchen waste for acid production[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 162-172. doi: 10.13205/j.hjgc.202510018

Citation:

SHEN Pengfei, QIN Weikai, SONG Xiaofei, LI Yonggang, YANG Lulu, GAO Yuchen, JIANG Jianguo. Effect of heat treatment on anaerobic fermentation of household kitchen waste for acid production[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 162-172. doi: 10.13205/j.hjgc.202510018

Citation:

SHEN Pengfei, QIN Weikai, SONG Xiaofei, LI Yonggang, YANG Lulu, GAO Yuchen, JIANG Jianguo. Effect of heat treatment on anaerobic fermentation of household kitchen waste for acid production[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 162-172. doi: 10.13205/j.hjgc.202510018

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Effect of heat treatment on anaerobic fermentation of household kitchen waste for acid production

doi: 10.13205/j.hjgc.202510018

1. China Iron Construction & Investment Construction Group Co., Ltd., Beijing 101300, China;
2. Environment R&D Center of China Iron Construction & Investment Construction Group, Shanghai 200331, China;
3. School of Environment, Tsinghua University, Beijing 100084, China;
4. China Railway Water Conservancy Group Co., Ltd., Xi'an 710000, China

Received Date: 2024-09-30
Accepted Date: 2024-11-28
Rev Recd Date: 2024-11-02

Available Online: 2025-12-03

Publish Date: 2025-10-01

Abstract

Abstract

With the mandatory implementation of waste sorting policies in China， effectively treating and utilizing household kitchen waste， which differs significantly in characteristics and presents greater challenges compared to restaurant kitchen waste， has become an important research topic. This study， based on an analysis of the composition and properties of household kitchen waste in Beijing， investigated the impact of different thermal pretreatment temperatures （80 ℃， 140 ℃， 200 ℃） on the acidogenic process during anaerobic fermentation of household kitchen waste. By systematically analyzing the compositional characteristics and the physicochemical changes of household kitchen waste under different pretreatment conditions， the study explored the variation patterns of key parameters such as soluble chemical oxygen demand （SCOD）， volatile fatty acid （VFAs） production， ammonia nitrogen， and orthophosphate concentrations. The results indicated that a thermal pretreatment temperature of 140 ℃ achieved the maximum acid production on the 6th day， with a VFAs concentration peak approaching 35000 mg/L， predominantly composed of acetic acid， indicating high microbial metabolic activity. Additionally， the moderate release of ammonia nitrogen and orthophosphate contributed to maintaining the stability of the fermentation system. In contrast， although the 200 ℃ pretreatment accelerated the decomposition of organic matter， the excessively high concentration of ammonia nitrogen likely inhibited microbial activity， resulting in a VFAs yield of only about 15，000 mg/L and significantly reduced fermentation efficiency. This study provides a theoretical basis for optimizing the anaerobic fermentation process of household kitchen waste， contributing to the improvement of waste-to-resource conversion efficiency.
- waste sorting,
- household kitchen waste,
- anaerobic fermentation,
- pretreatment,
- volatile fatty acids

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References(39)

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