CARBON NEUTRAL POTENTIAL OF WHOLE PROCESS OF CO-DIGESTION OF FOOD WASTE AND SLUDGE

LI Si; YUAN Huizhou; KE Shuizhou; LIU Xiaoming

doi:10.13205/j.hjgc.202411010

Volume 42 Issue 11

Nov. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(11): 90-98

LI Si, YUAN Huizhou, KE Shuizhou, LIU Xiaoming. CARBON NEUTRAL POTENTIAL OF WHOLE PROCESS OF CO-DIGESTION OF FOOD WASTE AND SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(11): 90-98. doi: 10.13205/j.hjgc.202411010

Citation:

LI Si, YUAN Huizhou, KE Shuizhou, LIU Xiaoming. CARBON NEUTRAL POTENTIAL OF WHOLE PROCESS OF CO-DIGESTION OF FOOD WASTE AND SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(11): 90-98. doi: 10.13205/j.hjgc.202411010

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CARBON NEUTRAL POTENTIAL OF WHOLE PROCESS OF CO-DIGESTION OF FOOD WASTE AND SLUDGE

doi: 10.13205/j.hjgc.202411010

1. College of Civil Engineering, Hunan University, Changsha 410000, China;
2. School of Materials andEnvironmental Engineering, Shenzhen Polytechnic University, Shenzhen 518000, China

Received Date: 2023-08-17
Available Online: 2025-01-16

Abstract

Abstract

In the context of China’s active promotion of carbon neutrality, co-digestion of food waste (FW) and sludge is a potential low-carbon treatment model. However, few studies have been conducted on the potential effect of co-digestion on wastewater treatment plants. In addition, the nitrogen content in the co-digested supernatant is high, and the low-carbon process of partial nitrification and anammox (PN/A) allows for low energy consumption and autotrophic nitrogen removal. Therefore, the co-digestion process of food waste and sludge was introduced in this study, and the supernatant was subjected to sidestream PN/A treatment, focusing on the carbon neutral potential and sustainability of food waste and sludge co-digestion. The findings indicated that the methane production of co-digestion was 109.5% higher than that of food waste digestion alone, the system could enhance the overall energy recovery by 1.3 times and achieve a carbon neutral state rate of 132.2%. Additionally, sensitivity analysis highlighted that low-energy operation and efficient energy resource recovery are crucial directions for combining food waste and wastewater treatment to accomplish carbon neutrality. The objective of this study is to provide a reference for the establishment of carbon-neutral collaborative treatment models, and provide both theoretical groundwork and practical assistance for the sustainable treatment of food waste and sludge.
- food waste,
- sewage sludge,
- sidestream PN/A,
- life cycle assessment,
- energy balance,
- carbon neutral potential

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References(39)

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