某制浆造纸厂污水处理原采用二级生化处理工艺。
The effluent disposal system in certain pulp and paper mills was a two-stage biochemical treatment process.
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.
为此，开展了潜流碎石床湿地去除二级生化处理出水中磷的研究。
Therefore, the study was made on the use of subsurface crushed stone wetland for phosphorus removal from the effluent of secondary bio-chemical treatment process.
针对国内制革综合废水的处理研究，从一级物化处理和二级生化处理两个方面做了概括。
The domestic study on the process and technology of synthetic effluent treatment in tannery from aspects of chemical and physical treatment and biological treatment is summarized.
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.
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.
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