海河干流入河排污口调查与评价

对2007年海河干流入河排污口进行了调查,采用等标污染负荷法进行评价。结果表明,分布在海河干流上8个入河排污口均存在超标排放问题,排污类型为工业废水和混合污水,以有机污染、富营养化污染和化工污染为主要特征。天碱泵站、大沽化工排水口、天碱排水闸为海河干流上的主要排污口,分别占海河干流等标污染负荷总量的27%、26%和17.4%。海河干流8个入河排污口达标污染总负荷为16.8亿t/a,即每年需要16.8亿t洁净水来稀释各排污口排放污水才能达到排放要求。

Investigation and assessment of wastewater outlets into main branch of Haihe River

The wastewater outlets at the main branch of the Haihe River were investigated and evaluated in 2007.The results showed that the discharged wastewater in the eight wastewater outlets at the main branch of the Haihe River all exceeded the pollution discharge standard of China.The types of discharged wastewater were industrial wastewater and mixed wastewater,and the main manifestations of pollution were organic pollution,eutrophication,and chemical industry pollution.The equivalent pollution load method was applied to the assessment of the wastewater outlets.The results showed that the Tianjian Pump Station,Tianjin Dagu Chemical Plant outlets,and Tianjian outlet gates were the main wastewater outlets to the main branch of Haihe River,and accounted for 27%,26%,and 17.4% of the wastewater,respectively.The total equivalent pollution load of eight wastewater outlets was 1.68×109t/a,which meant that 1.68×109tons of clear water were needed to dilute the wastewater in order to meet the discharge requirements.