Identification of high oxygen-consuming substances in stormwater drainage systems illicitly connected with sewage system  

作　　者：Chen Xu Zuxin Xu Wenhai Chu Shanshan Wu Rong Xiao Lei Su 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China [2]Ministry of Education Key Laboratory of Yangtze River Water Environment,Tongji University,Shanghai 200092,China [3]Guangzhou Resource Environmental Protection Technology Co.,Ltd.,Guangzhou 510030,China

出　　处：《Journal of Environmental Sciences》2024年第4期132-140,共9页环境科学学报（英文版）

基　　金：supported by the Key Research and Development Program of Guangdong Province(No.2020B1111350001);the National Key Research and Development Program of China(Nos.2021YFC3200700 and 2021YFC3200702)。

摘　　要：The dissolved oxygen content in water is an important indicator for assessing the quality of the water environment,and maintaining a certain amount of dissolved oxygen is essential for the healthy development of the ecological environment.When a water body is anoxic,the activity of anaerobic microorganisms increases and organic matter is decomposed to produce a large number of blackening and odorizing substances,resulting in black and odorous water bodies,which is a very common and typical phenomenon in China.Presently,there is still a relatively universal occurrence of illicitly connected stormwater and sewage pipes in the urban drainage pipe network in China,which makes oxygen-consuming substances be directly discharged into rivers through stormwater pipes and consume the dissolved oxygen in the water bodies,resulting in an oxygen deficiency of the water.This induces seasonal or year-round black and stink phenomena in urban rivers.Hence,identifying high oxygen-consuming substances,which lays the foundation for the subsequent removal of oxygen-consuming substances,is essential.Through a series of comparisons of water quality indicators and analysis of organic characteristics,it was found that the oxygen consumption capacity of domestic sewage was higher than that of industrial wastewater in the selected area of this study,and the oxygen-consuming substances of domestic sewage were small molecular amino acids.By comparing 20 conventional free amino acids,it was found that seven of them consumed oxygen easily,and compared with chemical oxygen consumption,biological oxygen consumption was in a leading position.

关 键 词：Urban drainage system Oxygen-consuming substances Domestic sewage Amino acid 

分 类 号：TU992[建筑科学—市政工程] X52[环境科学与工程—环境工程]