Against shortcomings of the present flue gas desulfurization(FGD)wastewater treatment process in coal-fired power plants

such as long process

various chemicals

excessive equipments and high operation cost

a novel FGD wastewater treatment method named one-step process was proposed

and the solid watercleaning agent was directly added.This method was applied in laboratory treatment test for the desulphurization wastewater from a power plant.The results show the optimal treatment condition is as follows.The stirring time is 60 min

the mixing speed is 160r/min and the purifying agent dosage is 2500mg/L.Under this condition

all measures of the treated effluent

such as suspended solid(SS)

F-

S2-

heavy metals

chemical oxygen demand(COD)and pH value

met the standard requirements of the DL/T997-2006.