EFFECTS OF ALKALI TREATMENT ON METHANE AND INTERMEDIATE AMINO ACIDS AND THEIR CORRELATION DURING ANAEROBIC DIGESTION OF WASTE ACTIVATED SLUDGE

XU Hui-ting; LIU Hui; MA Zhang-wen; CHEN Hao; ZHU Zhi-hao; XU Tian-chen; YE Jian-feng

doi:10.13205/j.hjgc.202205013

Volume 40 Issue 5

Jul. 2022

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XU Hui-ting, LIU Hui, MA Zhang-wen, CHEN Hao, ZHU Zhi-hao, XU Tian-chen, YE Jian-feng. EFFECTS OF ALKALI TREATMENT ON METHANE AND INTERMEDIATE AMINO ACIDS AND THEIR CORRELATION DURING ANAEROBIC DIGESTION OF WASTE ACTIVATED SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 88-94. doi: 10.13205/j.hjgc.202205013

Citation:

XU Hui-ting, LIU Hui, MA Zhang-wen, CHEN Hao, ZHU Zhi-hao, XU Tian-chen, YE Jian-feng. EFFECTS OF ALKALI TREATMENT ON METHANE AND INTERMEDIATE AMINO ACIDS AND THEIR CORRELATION DURING ANAEROBIC DIGESTION OF WASTE ACTIVATED SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 88-94. doi: 10.13205/j.hjgc.202205013

Citation:

XU Hui-ting, LIU Hui, MA Zhang-wen, CHEN Hao, ZHU Zhi-hao, XU Tian-chen, YE Jian-feng. EFFECTS OF ALKALI TREATMENT ON METHANE AND INTERMEDIATE AMINO ACIDS AND THEIR CORRELATION DURING ANAEROBIC DIGESTION OF WASTE ACTIVATED SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 88-94. doi: 10.13205/j.hjgc.202205013

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EFFECTS OF ALKALI TREATMENT ON METHANE AND INTERMEDIATE AMINO ACIDS AND THEIR CORRELATION DURING ANAEROBIC DIGESTION OF WASTE ACTIVATED SLUDGE

doi: 10.13205/j.hjgc.202205013

1. School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai 201209, China;
2. Shanghai Academy of Environmental Sciences, Shanghai 200233, China;
3. College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China;
4. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China;
5. State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

Received Date: 2021-06-16
Available Online: 2022-07-02

Abstract

Abstract

The effects of alkali treatment pH on the dissolution of organic matter, the types and configuration of amino acids produced by proteolysis and methane production by anaerobic digestion of waste activated sludge were studied. Two kinetic models were used to fit the methanogenesis process, and Spearman analysis was used to investigate the correlation between intermediate amino acids and methane production. The results showed that, when alkali treatment pH was 11, the cumulative methane production was 1.4 times higher than that of the control group. The modified Gompertz model had a good fitting effect on the methanogenesis process, the fitting coefficient was above 0.989, and the error range was within 3.9%. Alkali treatment could increase the content and types of amino acids by proteolysis. The dissolved amino acids have L-type and D-type, with the highest content of L-and D-Cys. The content of L-type was higher than its corresponding D-type(except Thr), in which the racemization degree(D/(D+L)) of Thr was the highest(54.0%), followed by Cys(45.5%) and Ala(44.0%). Among amino acids, D-Leu, D-Asp, L-Thr and L-Cys had a strong correlation with methane production, and their Spearman coefficients were 0.894, 0.9, 0.9 and 0.9(P<0.05), respectively. This study provides a theoretical basis for the follow-up study on the effects of amino acids and their configurations on anaerobic digestion and as well as a new idea for the regulation of anaerobic digestion.
- alkali treatment,
- waste activated sludge,
- amino acid enantiomer,
- kinetic model of methane production,
- Spearman correlation analysis

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References(35)

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