In addition, sludge return from chemical bio-flocculationprocess can not only improve the removal effect, but also has some stabilization effect on the fluctuation of inflow quality.
在化学生物絮凝工艺中污泥回流不仅可以提高去除效果，而且对进水水质波动有一定的稳定作用。
2
The dyeing wastewater which was oxidized by bio-aeration has been treated through the process of flocculation sediment, then filtrated with the slag.
经生物曝气氧化后的印染废水，采用聚合氯化铝或聚合硫酸铁作絮凝剂进行絮凝处理。
3
For seasonal ammonia and organic micro-polluted raw water, biological sludge in sedimentation tank following bio-pretreatment was returned to flocculation tank, to enhance conventional process.