ENHANCEMENT OF CO-DIGESTION OF SLUDGE AND FOOD WASTE BY HIGH TEMPERATURE PRETREATMENT

YUAN Yue; WANG Bo; LI Yongbo; KE Hang; ZHAO Shuiqian

doi:10.13205/j.hjgc.202302013

Volume 41 Issue 2

Feb. 2023

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YUAN Yue, WANG Bo, LI Yongbo, KE Hang, ZHAO Shuiqian. ENHANCEMENT OF CO-DIGESTION OF SLUDGE AND FOOD WASTE BY HIGH TEMPERATURE PRETREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 91-97. doi: 10.13205/j.hjgc.202302013

Citation:

YUAN Yue, WANG Bo, LI Yongbo, KE Hang, ZHAO Shuiqian. ENHANCEMENT OF CO-DIGESTION OF SLUDGE AND FOOD WASTE BY HIGH TEMPERATURE PRETREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 91-97. doi: 10.13205/j.hjgc.202302013

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ENHANCEMENT OF CO-DIGESTION OF SLUDGE AND FOOD WASTE BY HIGH TEMPERATURE PRETREATMENT

doi: 10.13205/j.hjgc.202302013

1. Shanghai Municipal Engineering Design Institute (Group) Co., Ltd, Shanghai 200092, China;
2. National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China;
3. Beijing General Municipal Engineering Design & Research Institute Co., Ltd, Beijing 100082, China

Received Date: 2022-02-17
Available Online: 2023-05-25
Publish Date: 2023-02-01

Abstract

Abstract

Co-digestion of sludge and food waste can improve the stabilization of sludge. To enhance the co-digestion of sludge and food waste, the operation strategy of high temperature pretreatment and medium temperature anaerobic digestion was put forward. Moreover, the mechanism of the co-digestion system was discussed from the macro and micro levels, in order to provide technical support for the application of the strategy in practical engineering. Results showed that the operation strategy can not only improve the hydrolysis but also enhance the co-digestion effect. The ratio of SCOD/TCOD increased from 33.9% to 65% after one-day high temperature pretreatment of sludge and food waste. Methane production rate and organic removal rate of this study achieved 0.54 L/g and 78.8% (SRT=20 d), 0.76 L/g and 56.6% (SRT=15 d), higher than the actual project of high temperature (150~170℃) and high pressure (1 MPa) for pretreatment. Illumina MiSeq sequencing revealed that hydrolytic/acidogenic bacteria, such as Porphyromonadaceae, Draconibacteriaceae, Eubacterium and Romboutsia, were enriched in the co-digestion system after high temperature pretreatment. The bacteria promoted hydrolysis/acidification, and made sure methanogens have enough substrate to produce methane. Therefore, the gas production from the co-digestion of sludge and food waste was strengthened.
- sludge,
- food waste,
- co-digestion,
- high temperature pretreatment

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References(30)

References

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