Nearly a week, as the temperature was rising, the cooling tower of Huasu plant became a good living place for algae and microorganism which could decrease the heat exchanging effect. During the leisure time, WOM staff in Huasu project organized operators to add non-oxidative germicide in the No.1 and No.2 cooling tower. This was quite effective method to clear the algae and microorganism thus guarantee the stable and safe operation of recycling water system.