Abstract: A method for testing ecotoxicity of disinfection by-products (DBPs) is disclosed, including the following steps: firstly, hatching and culturing a brine shrimp to obtain a second-instar brine shrimp larvae; secondly, putting the brine shrimp larvae into a water sample containing the DBPs, obtaining a survival rate through acute toxicity exposure and chronic toxicity exposure, respectively, to calculate the toxicity of the water sample to brine shrimp. The new method includes both acute and chronic toxicity tests. The test water sample can be either a single substance solution or an actual disinfection water sample. The brine shrimp has high sensitivity and is convenient to hatch and culture. The raw materials are inexpensive and easily available. The requirements for the culture environment are not high, and the toxicity end-point is clear. The new method is simple, sensitive and economical, and therefore, a popularization is feasible in sewage and reuse water plants.

Abstract: A method for testing ecotoxicity of disinfection by-products (DBPs) is disclosed, including the following steps: firstly, hatching and culturing a brine shrimp to obtain a second-instar brine shrimp larvae; secondly, putting the brine shrimp larvae into a water sample containing the DBPs, obtaining a survival rate through acute toxicity exposure and chronic toxicity exposure, respectively, to calculate the toxicity of the water sample to brine shrimp. The new method includes both acute and chronic toxicity tests. The test water sample can be either a single substance solution or an actual disinfection water sample. The brine shrimp has high sensitivity and is convenient to hatch and culture. The raw materials are inexpensive and easily available. The requirements for the culture environment are not high, and the toxicity end-point is clear. The new method is simple, sensitive and economical, and therefore, a popularization is feasible in sewage and reuse water plants.

Abstract: Disclosed is a method for controlling a chlorinated nitrogen-containing disinfection by-product in water, including the following steps: firstly, the pH value of a water sample is controlled, ultraviolet irradiation treatment is used and a persulfate or hydrogen persulfate is added at the same time, then chlorination disinfection is carried out, and finally, aeration treatment is carried out, so that a water sample from which the chlorinated nitrogen-containing disinfection by-product in water is removed and obtained. The method can effectively control the formation of chlorinated N-DBPs, and can effectively reduce the amount of trichloromethane in the subsequent chlorination disinfection process.

Abstract: Disclosed is a method for controlling a chlorinated nitrogen-containing disinfection by-product in water, including the following steps: firstly, the pH value of a water sample is controlled, ultraviolet irradiation treatment is used and a persulfate or hydrogen persulfate is added at the same time, then chlorination disinfection is carried out, and finally, aeration treatment is carried out, so that a water sample from which the chlorinated nitrogen-containing disinfection by-product in water is removed and obtained. The method can effectively control the formation of chlorinated N-DBPs, and can effectively reduce the amount of trichloromethane in the subsequent chlorination disinfection process.