The formation of wastewater and source of various pollutants from the limestone/gypsum wet desulphurization of 600 MW unit in one power plant have been analysed in detail

the technological process of wastewater treatment system for wet desulphurization being presented

and the problems existing in practical operation of the wastewater treatment system being summarized up and concluded.Through analysis

the corresponding retrofit measures have been put forward as in the following:adopting the highly effective swirler;installing additionallty the presettling tank;increasing revolution speed of agitator in the neutralization basin

the settling basin

and the flocculation basin;installing additionally mechanical agitator in the aerating basin for wastewater regulation;retrofitting structure of the clarification basin;adjusting the dosage to improve function of the press-filter;as well as increasing the number of detecting instruments ets..After the optimized retrofitting

the wastewater treatment system for desulphurization has been in normal and stable operation at present

all indices of discharges tally well with the standard.