COD total emissions come mainly from industrial pollution sources and domestic pollution sources in Yuanbao District. Among them, industrial pollution sources produce COD of 140817a and emissions of 235.82T/a; domestic pollution sources produce COD of 6330.52T/a and emissions of 4657.96 T/a Through the investigation of pollution sources, the emissions of COD were analyzed in Yuanbao District, in order to better control and manage environmental pollution.%元宝区COD的总量排放主要来自工业源和生活源,其中工业源COD产生量为1408 T/a、排放量为235.82 T/a；生活源COD产生量为6330.52 T/a、排放量为4657.96 T/a.通过污染源调查,分析元宝区污染物COD排放情况,以利于今后更好地控制和管理环境污染.
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