Using a strong chemical oxidant, potassium ferrate (K2 FeO4 ), in waste activated sludge treatment: A review

Environmental Research
Jiawei HuWenquan Tao

Abstract

The ever-increasing production of waste activated sludge (WAS) has become a widespread problem to sewage treatment plants around the world. Among the multitudinous sludge treatment methods, chemical oxidation is considered as an excellent technology with both high efficiency and low investment cost. As an eco-friendly oxidant, potassium ferrate (PF) has attracted great attention in sludge treatment over the past decade. The applications of PF have demonstrated advantages in: (1) sludge dewatering; (2) minimization; (3) anaerobic fermentation; (4) removal of pollutants. This review summarizes recent work on the effects of PF on these four aspects of facilitating sludge disposal. Meanwhile, the underlying mechanisms for the diverse applications of PF on sludge treatment are analyzed. Furthermore, the shortages and knowledge gaps on current PF oxidizing methods are discussed, and directions for further research to simultaneously enhance treatment efficiency and reduce processing cost are suggested as well.

Citations

Nov 18, 2020·International Journal of Environmental Research and Public Health·Yahui ZhouJun Wen
Jan 28, 2021·Environmental Science and Pollution Research International·Emília MališováMichaela Benköová
Mar 21, 2021·The Science of the Total Environment·Chenxi JinGuangming Li
Nov 20, 2021·The Science of the Total Environment·Cong-Cong TangAijie Wang

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