在对工业废水二级处理基础上，寻求最佳的深度处理工艺。
On the basis of the secondary treatment of industrial wastewater, an optimum advanced treatment technology is searched for.
针对炼油厂含油废水的常规生化处理工艺对氨氮的降解效果较差，采用曝气生物滤池作为二级生化进行试验研究。
Aiming at the poor effect of amino nitrogen degradation in conventional refinery oil sewage treatment, the secondary biochemical test was carried with biological aeration filter pool.
概述了制革废水一级物化处理和二级生化处理的各种方法。
The methods of chemical and physical treatment and biological treatment on tannery waste water are summarized.
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