In wastewater treatment, flotation is used principally to remove suspended matter and to concentrate biosolids.
在废水处理中，浮选主要用来去除水中的悬浮物和浓缩生物颗粒。
2
The utilization of mixtures of fly ash and biosolids in soil amendment is suggested to be one of the best methods of solid waste disposal and utilization.
As China gradually constructs, and sometimes operates, wastewater treatment works to improve the quality of rivers so biosolids (sludge) will be produced.