Research on Characteristics of Carbon Emissions in Medium-sized Urban Sewage Treatment Plants Using Improved A<sup>2</sup>O Processes

ZHAO Zejia; TUO Haorui; XIE Xiangta; CHEN Jian; HAN Songlei; ZHAO Xiaoqing; LIU Xueming

doi:10.6054/j.jscnun.2024008

Journal of South China Normal University (Natural Science Edition) > 2024 > 56(1): 63-71. > DOI: 10.6054/j.jscnun.2024008

ZHAO Zejia, TUO Haorui, XIE Xiangta, CHEN Jian, HAN Songlei, ZHAO Xiaoqing, LIU Xueming. Research on Characteristics of Carbon Emissions in Medium-sized Urban Sewage Treatment Plants Using Improved A²O Processes[J]. Journal of South China Normal University (Natural Science Edition), 2024, 56(1): 63-71. DOI: 10.6054/j.jscnun.2024008

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Research on Characteristics of Carbon Emissions in Medium-sized Urban Sewage Treatment Plants Using Improved A²O Processes

1.
Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200082, China
2.
College of Environment and Energy, South China University of Technology, Guangzhou 510006, China
3.
Shantou Housing and Urban-Rural Development Bureau Guang, Shantou 515041, China

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Received Date: August 28, 2023
Available Online: April 29, 2024

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Abstract

Abstract

The carbon-emission-factor approach was used to conduct the total carbon emissions and carbon emission intensity of 4 medium-sized sewage treatment plants with similar scale but different A²O processes in Shantou. The results show that the total carbon emissions with different A²O processes are different. The total carbon emission intensity of the 4 sewage treatment plants ranged from 0.317 to 0.402 kg/m³(CO₂-eq). The carbon emissions in order from smallest to largest based on the processing are: multi-stage AO, A²O+anaerobic/hypoxia regulating tank, traditional A²O, A²O+micro-aeration oxidation ditch. However, the carbon emission categories of different processes are similar, and electricity consumption is the most important carbon emission source for each process. Compared with the traditional A²O process, the other three improved A²O processes have advantages in reducing carbon emission intensity of chemicals consumption, CH₄ emission, N₂O emission and sludge disposal. And the multi-stage AO process shows the greatest ability to reduce the total carbon intensity. Based on the above results, some suggestions for the carbon emission optimization of the improved A²O processes were put forward.
- sewage treatment plants,
- A²O,
- carbon emission

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References (38)

References

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Research on Characteristics of Carbon Emissions in Medium-sized Urban Sewage Treatment Plants Using Improved A²O Processes