What kind of disinfectants are generally used in water plants in Zhuzhou, Hunan?

The tools used for disinfection in Zhuzhou Water Plant in Hunan are divided into: liquid chlorine, sodium hypochlorite, sodium chlorate hydrochloride, and chlorine dioxide. The specific choice depends on how much water the water company treats every day? When the water volume is more than 30,000 tons, it is convenient to use liquid chlorine. When the water volume is 20,000 to 30,000 tons, it is convenient to use sodium hypochlorite. When the water volume is 10,000 to 20,000 tons, it is convenient to use sodium chlorate hydrochloride and chlorine dioxide.