混凝气浮过滤处理机械加工废水的试验研究

机械加工废水是严重的水体污染源之一，水质具有含油多，可生化性差等特点。采用混凝气浮-过滤为主体工艺，对哈轴集团一厂区的生产废水进行了生产性试验研究。试验结果表明：在进水COD和油类分别为400mg/L和200mg/L的情况下，出水水质分别达到了60mg／L和10mg／L，去除率高达85％和95％。经济分析表明：废水的运行成本为1．4元／t，具有显著的经济效益。

Study on the productive tests of the treatment of wastewater from mechanical industry by coagulation and air-flotation and filtration

As one of serious pollution source, the wastewater from the mechanical industry contains lots of oil that is not readily degradable. A full-scale experiment is carried out to treat the wastewater in the 1st plant of the Harbin Bearing Group Company, in which the coagulation and air-flotation and filtration are used as the main treatment process. The experiment result indicates that: when the COD and oil of primary water is 400 mg/L and 200 mg/L, the COD and oil of outlet water is 60 mg/L and 10 mg/L, the removal rate is 85% and 95% respectively. The economic analysis indicates that the running cost of the project is 1.4 $/t and the benefit is prominent.