ANALYSIS OF DYNAMIC CHANGES IN CARBON EMISSIONS OF UNDERGROUND RECLAIMED WATER PLANTS IN OPERATION PHASE IN GUIYANG

LU Qian; WU Yonggui; WANG Yiran; HAN Yiqin

doi:10.13205/j.hjgc.202411012

Volume 42 Issue 11

Nov. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(11): 106-114

LU Qian, WU Yonggui, WANG Yiran, HAN Yiqin. ANALYSIS OF DYNAMIC CHANGES IN CARBON EMISSIONS OF UNDERGROUND RECLAIMED WATER PLANTS IN OPERATION PHASE IN GUIYANG[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(11): 106-114. doi: 10.13205/j.hjgc.202411012

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LU Qian, WU Yonggui, WANG Yiran, HAN Yiqin. ANALYSIS OF DYNAMIC CHANGES IN CARBON EMISSIONS OF UNDERGROUND RECLAIMED WATER PLANTS IN OPERATION PHASE IN GUIYANG[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(11): 106-114. doi: 10.13205/j.hjgc.202411012

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ANALYSIS OF DYNAMIC CHANGES IN CARBON EMISSIONS OF UNDERGROUND RECLAIMED WATER PLANTS IN OPERATION PHASE IN GUIYANG

doi: 10.13205/j.hjgc.202411012

LU Qian^1,2,
WU Yonggui^{1
,
,},
WANG Yiran²,
HAN Yiqin²

1. College of Resources and Environmental Engineering, Guizhou University, Guiyang 550000, China;
2. Guizhou Zhuxin Water Environment Co., Ltd., Guiyang 550000, China

Received Date: 2023-09-21
Available Online: 2025-01-16

Abstract

Abstract

Urban wastewater treatment plants (WWTPs), as one of the main sources of human greenhouse gas emissions, have gradually attracted attention. In this paper, four reclaimed water plants in Guiyang were taken as the case to calculate carbon emission intensity and influencing fuctors. All the four plants adopt the inverted A²/O (anaerobic-anoxic-oxic) denitrification and phosphorus removal process. The carbon emissions during the operation stage of reclaimed water plants were divided into direct carbon emissions and indirect carbon emissions. Direct carbon emissions include methane (CH₄) emissions and nitrous oxide (N₂O) emissions, while indirect carbon emissions include energy-related carbon emissions and material-related carbon emissions. Based on the mixed carbon emission coefficient, it was calculated that the carbon emission intensity in 2022 ranges from 0.579 kg CO₂/m³ to 0.781 kg CO₂/m³, and the contribution of carbon emissions was in the order of energy consumption (62%~69%)>greenhouse gas N₂O produced by TN reduction (15%~23%)>material consumption (12%~16%)>greenhouse gas CH₄ produced by COD reduction (2%~3%). Carbon emissions factors of reclaimed water plants include treatment scale, actual sewage treatment capacity, post-treatment water quality requirements, energy consumption type, operating conditions, sludge dewatering methods, etc. Therefore, the management personnel of the sewage treatment plant should implement fine management, adjust the use of high power consumption equipment and the dosage of chemicals according to the influent quality and quantity, to promote the low-carbon management of water, energy conservation and carbon emission reduction of the reclaimed water plants.
- underground reclaimed water plant,
- greenhouse gases,
- direct emissions,
- indirect emissions,
- dynamic changes

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References

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