Method and experimental method for controlling haloacetonitrile by using phosphate-reinforced biological activated carbon

Abstract

The invention discloses a method and an experimental method for controlling haloacetonitrile by using phosphate-reinforced biological activated carbon. The method for controlling haloacetonitrile by using phosphate-reinforced biological activated carbon comprises the following steps: S1, adding surface water into a biological activated carbon filter tank; S2, adding a phosphate solution into the biological activated carbon filter tank, uniformly stirring, and reacting in a dark place for a period of time; and S3, discharging surface water in the biological activated carbon filter tank and performing chlorine disinfection treatment, wherein the addition concentration of the phosphate solution in the step S2 is 0.2-0.7 mg / L. Compared with the prior art, the method has the advantages that the phosphate solution is added into the biological activated carbon filter tank, so that the microbial action of the biological activated carbon can be enhanced, the generation amount of microorganism EPS in a biological membrane on the biological activated carbon is reduced, the removal of DOC in the surface water by the biological activated carbon is promoted, and thus the generation potential of the nitrogen-containing disinfection by-product haloacetonitrile is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of drinking water treatment, in particular to a method and an experimental method for controlling haloacetonitrile with phosphate-enhanced biological activated carbon. Background technique [0002] Disinfection is usually the next process of the biological activated carbon process. Chlorine is widely used because it is cheap, easy to transport and store, has a good bactericidal effect, and can completely oxidize odorous substances. However, people detect it in water after disinfection. Conventional disinfection by-products such as trihalomethanes and haloacetic acids, and studies have shown that after chlorine disinfection, nitrogen-containing disinfection by-products that are more harmful to the human body will be produced, and their toxicity is 30-80 times that of carbon-containing disinfection by-products. Therefore, halogen-acetonitrile As a typical nitrogen-containing disinfection by-product, it has att...

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Problems solved by technology

[0004] However, in recent years, a small number of studies have begun to report that the microbial metabolites inside the black box of the drinking water bioactivated carbon filtration process are used as the "source" of precursors, which increases the potential for the formation of some highly toxic N-DBPs (nitrogenous disinfection by-products)

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