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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广州威达高实业有限公司A厂引进芬兰YIT公司的物化一生物二级废水处理系统。

The physicochemical and biological two stages treatment systems was imported to Pa- per Mill A of Guangzhou Victorgo Industrial Co. Ltd. from YIT, Finland.

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