EFFECTS OF PRETREATED METHODS ON VOLATILE FATTY ACIDS PRODUCTION THROUGH SLUDGE ANAEROBIC FERMENTATION

KE Yi-hong; ZENG Yi-fang; LI Hua-fan; CHEN Jie-jie; WU Chun-shan; LIU Chang-qing; ZHENG Yu-yi

doi:10.13205/j.hjgc.202008004

Volume 38 Issue 8

Nov. 2020

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(8): 21-26,12

KE Yi-hong, ZENG Yi-fang, LI Hua-fan, CHEN Jie-jie, WU Chun-shan, LIU Chang-qing, ZHENG Yu-yi. EFFECTS OF PRETREATED METHODS ON VOLATILE FATTY ACIDS PRODUCTION THROUGH SLUDGE ANAEROBIC FERMENTATION[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 21-26,12. doi: 10.13205/j.hjgc.202008004

Citation:

KE Yi-hong, ZENG Yi-fang, LI Hua-fan, CHEN Jie-jie, WU Chun-shan, LIU Chang-qing, ZHENG Yu-yi. EFFECTS OF PRETREATED METHODS ON VOLATILE FATTY ACIDS PRODUCTION THROUGH SLUDGE ANAEROBIC FERMENTATION[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 21-26,12. doi: 10.13205/j.hjgc.202008004

Citation:

KE Yi-hong, ZENG Yi-fang, LI Hua-fan, CHEN Jie-jie, WU Chun-shan, LIU Chang-qing, ZHENG Yu-yi. EFFECTS OF PRETREATED METHODS ON VOLATILE FATTY ACIDS PRODUCTION THROUGH SLUDGE ANAEROBIC FERMENTATION[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 21-26,12. doi: 10.13205/j.hjgc.202008004

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EFFECTS OF PRETREATED METHODS ON VOLATILE FATTY ACIDS PRODUCTION THROUGH SLUDGE ANAEROBIC FERMENTATION

doi: 10.13205/j.hjgc.202008004

1. College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China;
2. Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou 350007, China;
3. Fujian Minhuan Test and Detection Co., Ltd, Fuzhou 350000, China;
4. College of Geographical Science, Fujian Normal University, Fuzhou 350007, China

Received Date: 2020-03-02

Abstract

Abstract

Anaerobic fermentation of different pretreated sludge for volatile fatty acids production can not only effectively treat sludge problems but also realize resource cycling. In this paper, batch tests were conducted to investigate the volatile fatty acids production efficiency from anaerobic fermentation by acid (pH=3 and pH=4), alkali (pH=10 and pH=11) and low temperature (70 ℃, 90 ℃) pretreatment. The results showed that the accumulation of volatile fatty acids mainly occurred in the first 24h during anaerobic fermentation process, and ranked as pH=11 > 90 ℃ > pH=10 > 70 ℃ > pH=3 > pH=4 > control group, and acid production by alkali treatment had the most obvious advantages, while the effect of acid treatment was the worst. Acetic acid was the main component of volatile fatty acids, and its highest concentration was 1232.31 mg/L (pH=11), which was 5.2 times higher than that of control group. Methane production rose slowly at the later stage of anaerobic fermentation, and volatile fatty acids was consumed in the methanogensis process. Therefore, considering the economy and consumption of volatile fatty acids by acidophilic methanogens, 24 hours was the best fermentation time.
- sludge,
- VFAs,
- low temperature pretreatment,
- acid pretreatment,
- alkali pretreatment

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References(39)

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