甬江水质控制规划研究

甬江流经经济腾飞的宁波市,污染日趋严重;新老工业混杂,老城区排水系统落后,是沿海开放城市实施水污染控制的共同问题。采取对有毒有害污染物实行浓度控制、对可降解污染物实行总量控制相结合的原则,因地制宜确定水质目标的指标体系,全面分析新老企业的污染治理状况、环境的纳污能力及经济响应关系,给出污染负荷-环境治理投资-甬江水质关系图线。由此可确定,宁波市只需投资1.9亿元,从重点污染源治理中去除BOD_3负荷2.5t/d,即可使甬江水质维持1987年状况,并较原分区二级治理方案节省投资2.5亿元。

Study on Water Quality Control Plan of Yongjiang River of Zhejiang Province

Yongjiang River flows through Ningbo city, whose flourishing economy makes the river polluted worse and worse. The old industry mixes with the new, and the drainage system in the old district is imperfect. These are the common problems for the coastal cities opening to the outside world, based on the combination of the principles of concentration conttrol for degradable pollutants, and determination of water quality index system according to its real conditions and con-prehensive analysis of pollution control scenari, technologies, reception capacity of pollutants of the environment and economic response of the old and new enterprices, a chart of pollution load-capital cost-environmental effect was dratted. It was concluded that Ningbo needs only to invest 190 million Yuan (58% less than the secondary treatment scheme) and remove BOD load 2.5 t/d from leading sources to keep the water quality for Yongjiang River to its 1987 level.