COMPARATIVE ANALYSIS ON ENERGY AND CARBON EMISSION OF TYPICAL SLUDGE TREATMENT PROJECTS IN CHINA AND THE UNITED STATES

ZHAO Gang; TANG Jianguo; XU Jingcheng; LUO Jingyang; JIANG Ming; YUAN Xianchen; ZHOU Chuanting

doi:10.13205/j.hjgc.202212002

Volume 40 Issue 12

Nov. 2022

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ZHAO Gang, TANG Jianguo, XU Jingcheng, LUO Jingyang, JIANG Ming, YUAN Xianchen, ZHOU Chuanting. COMPARATIVE ANALYSIS ON ENERGY AND CARBON EMISSION OF TYPICAL SLUDGE TREATMENT PROJECTS IN CHINA AND THE UNITED STATES[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 9-16. doi: 10.13205/j.hjgc.202212002

Citation:

ZHAO Gang, TANG Jianguo, XU Jingcheng, LUO Jingyang, JIANG Ming, YUAN Xianchen, ZHOU Chuanting. COMPARATIVE ANALYSIS ON ENERGY AND CARBON EMISSION OF TYPICAL SLUDGE TREATMENT PROJECTS IN CHINA AND THE UNITED STATES[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 9-16. doi: 10.13205/j.hjgc.202212002

Citation:

ZHAO Gang, TANG Jianguo, XU Jingcheng, LUO Jingyang, JIANG Ming, YUAN Xianchen, ZHOU Chuanting. COMPARATIVE ANALYSIS ON ENERGY AND CARBON EMISSION OF TYPICAL SLUDGE TREATMENT PROJECTS IN CHINA AND THE UNITED STATES[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 9-16. doi: 10.13205/j.hjgc.202212002

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COMPARATIVE ANALYSIS ON ENERGY AND CARBON EMISSION OF TYPICAL SLUDGE TREATMENT PROJECTS IN CHINA AND THE UNITED STATES

doi: 10.13205/j.hjgc.202212002

1. Shanghai Urban Construction Design & Research Institute Groups Co., Ltd, Shanghai 200125, China;
2. College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China;
3. College of Environment, Hohai University, Nanjing 210098, China;
4. College of Science and Technology, Hong Kong Metropolitan University, Hong Kong 999077, China

Received Date: 2022-08-26
Available Online: 2023-03-23

Abstract

Abstract

China and the United States have large wastewater treatment and high carbon emission scale. The carbon emission from sludge treatment and disposal is an important part of the total carbon emission of sewage treatment plants. A reasonable sludge management strategy is the key to future carbon emission reduction of sewage treatment plants. In this paper, the sludge treatment facilities and paths of six typical wastewater treatment plants in China and the United States were investigated on-site, and the performance characteristics of energy recovery and carbon emission of different typical sludge treatment processes in China and the United States were analyzed. The results showed that, without considering carbon offset, among the six wastewater treatment plants in China and the US, the carbon emission of East China A (mesophilic anaerobic digestion+dewatering+landfill/land use), East China B (dewatering+landfill/incineration), East China C (dewatering+incineration), Hyperion (thermophilic anaerobic digestion+dewatering+agricultural end-use), OCSD (mesophilic anaerobic digestion+dewatering+agriculture end-use) and Blue plains (thermo hydrolysis+mesophilic anaerobic digestion+dewatering+agricultural end-use) were 1410, 1881, 1914, 471, 402, 405 kg CO₂/t DS, respectively. Considering the carbon offset effect caused by energy recovery and resource utilization, the net carbon emission from sludge treatment and disposal in the six WWTPs were 984, 1681, 1941, -183, -240, -315 kg CO₂/t DS, respectively. The carbon emission offset efficiency of six WWTPs in China and the United States was 30.2%, 10.6%, 0%, 138.9%, 159.7% and 177.9%, respectively. Sludge anaerobic digestion and land utilization of its product were the keys to carbon emission reduction, and increasing the organic matter content of sludge could enhance the carbon offset effect. The research results could provide basis and reference for the low-carbon transformation of WWTPs in China and the harmless, reduced and low-carbon treatment of sludge.
- sludge treatment and disposal,
- energy consumption,
- carbon emission,
- anaerobic digestion,
- carbon offset

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References(20)

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