The effluent disposal system in certain pulp and paper mills was a two-stage biochemicaltreatment process.
某制浆造纸厂污水处理原采用二级生化处理工艺。
2
Conventional biochemicaltreatment has reached its technical limit and is hard to improve its treatment effectiveness.
传统的化学法和生化法几乎达到技术极限，处理效果很难提高。
3
Steel slag is porous and has high adsorption ability, which will be designed as fill material to steel slag filtering reactors after biochemicaltreatment.