Biological method A+O+A is developed through innovation to the original dephenolizing tank to conduct biological denitrogenation and the result is good.The discharging water is recycled to be used.

• 利用原有的生化脱酚池改造为A+O+A生物法,进行生物脱氮,效果很好,处理后的出水全部循环使用,不外排。