The mechanism of algae growth in raw water affecting the effluent water quality from clarifying pond with mechanical agitation has been analysed

and taking one power plant as example

directing against problems of this kind occurred on equipments in the field

corresponding solution measures have been put forward as follows:(1)adjusting pH value of the raw water to be 6.5～7.5;(2)increasing the dosage of chlorine dioxide germicide from 1.5 mg/L to 2.4 mg/L;(3)increasing the dosage of polymeric aluminum chloride from 5.6 mg/L to 11.2 mg/L.After adopting these measures

in summer season during period of abnormally rapid reproducing of algae in raw water

the clarifying pond with mechanical agitation can be in normal operation

ensuring the quality of desalted water in power plant.