Comparing the removal rate of effluent color before and after treatment by Fe/C micro-electrolysis process or FeSO_4 coagulation,the treating result of micro-electrolysis method is superior to that of FeSO_4 coagulation.

The test results show that under the condition of pH of 2 to 4 and by using FeSO4 reduction and coagulation under the alkaline condition,the removal rate of vanadium can reach 99 percent or more,with the remains of vanadium being less than 1 mg/L.

The effect of FeSO_4 on the permeation flux of ceramic membrane in microfiltration of titanium white waste acid was investigated.

Better results are achieved in treatment of condenser corrosion by maintenance and operation examination , FeSO_4 coating ,etc.

Two kinds of purifying agents FeSO 4 and activated silica acid to treat the water of low temperature and low turbidity were introduced in this paper, the effects was determined of the amount of activator, activate time, the amount of FeSO 4 and activated silica acid on turbidity were studied, and finds its optimal technical condition.

Study on the treatment of tanning synthetic wastewater by coagulation-flocculation;