RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2024, Vol. 33 >> Issue (3): 615-624.doi: 10.11870/cjlyzyyhj202403014

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Discharge Characteristics of the Rural Domestic Sewage and Its Influencing Factors  in Different Terrains of Jiangxi Province

HU Fei-chao1,2, YAO Jian-feng3， LIU Lu1,2, ZHANG Wen-qiang1,2, WANG Gong-ting1,2, PANG Kuo1,2, GUO Ya-li4,5, ZHANG Ting4,5, LI Min1,2   

  1. (1.Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;  2.Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Scienceand Engineering, Beijing Forestry University, Beijing 100083, China;  3.Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China;  4.Yangtze eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, China)
  • Online:2024-03-20 Published:2024-04-03

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Abstract: To analyze the discharge characteristics of rural domestic sewage in different terrains of Jiangxi Province, three terrains including mountainous, hilly and plain, were selected to monitor the gray water and black water of rural residents' domestic sewage.The characteristics of rural residents' domestic sewage discharge, the correlation between each index and the factors affecting the discharge characteristics were studied.The results indicated that per capita water consumption of rural residents in mountainous, hilly and plain areas was 100.08, 96.89 and 94.52 L/（d·cap）, respectively.The peak pollutant concentrations in a day were between 10：00-14：00 (gray water) and 14：00-18：00 (black water), and the maximum pollutant concentrations occurred in winter and the minimum occurred in summer.The median concentrations of COD, SS, NH4+N, TN and TP in effluent were 487.5, 67.5, 3.49, 33.85, 6.36 mg/L (gray water) and 481, 76, 97.6, 146, 13.1 mg/L (black water).A highly significant positive correlation was found between NH4+-N, TN, and TP for two of the three terrains sewage, and the correlations between COD and TN and TP were all significant.Terrain demonstrated a larger significance of level of influence on wastewater quality than the factors of income level and average household size.This study can provide reference for the management of rural domestic sewage in Jiangxi Province and ecological environmental protection in Poyang Lake basin.

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