Denitrification filler, denitrification filler ball and application thereof

Abstract

The invention provides a denitrification filler and a denitrification filler ball. The denitrification filler is prepared by taking PHBV as a basal body and adding an iron powder, nitrifying bacteriaand denitrifying bacteria. A hydroxyl functional group is contained in PHBV, so that the biofilm culturing of active nitrifying bacteria is promoted; the active nitrifying bacteria forming a biological film also can be used for carrying out nitrification and denitrification by taking PHBV as a carbon source, so that nitrogenous substances in water are decomposed effectively; the addition of the carbon source is greatly reduced in sewage disposal, so that secondary pollution of a water body is avoided; moreover, the active nitrifying bacteria are used for decomposing PHBV according to the concentration of nitrogen in the water body to release corresponding carbon source, the extracellular decomposition of PHBV is nearly equal to nitric acid reducing action, and PHBV cannot release dissolvable organic carbon to pollute the water body; the iron powder is added into the system through emulsion dispersion, iron ions are released through the betatopic oxidization process of iron powder, andthe iron ions are combined with phosphate to realize dephosphorization. According to the denitrification filler ball provided by the invention, total nitrogen and total phosphorus in sewage are reduced effectively, the removal efficiency is high, and the program control is simple and convenient.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a denitrification filler, a denitrification filler ball and an application thereof. Background technique [0002] With the development of global urbanization, the dependence of urban ecosystems on external nutrient nitrogen is increasing, which drives the large-scale production of artificially activated nitrogen, and the resulting environmental problems threaten human health and life safety. The discharge of nitrogen pollutants caused by the sewage treatment process has become the main source of nitrogen pollution in the urban ecosystem. The sewage treatment process will also export nitrogen-containing pollutants to the environment. These output products have weakened the environmental benefits of sewage treatment to a certain extent. [0003] In still or slow-moving water bodies, excessive phosphorus concentration will cause eutrophication of water bodies. The eutroph...

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Problems solved by technology

[0004] In order to solve the technical problems of high nitrogen ratio in the sewage treatment process, the need for continuous dosing of carbon sources, and poor biocompatibility of the carrier in the prior art, the present invention provides a high-efficiency and low-cost denitrification filler ball. The denitrification filler provided by the invention Balls, containing a large amount of polyhydroxybutyrate copolyester valerate, can be directly put into water to continuously degrade nitrogen in water, and at the same time reduce total phosphorus and organic matter. The polyhydroxybutyrate and valerate copolyester in the later stage of the reaction will continue to be consumed, reducing the solubility Substance precipitation; polyhydroxybutyric acid and valeric acid copolyester have a large specific surface area, which can effectively reduce nitrogen in water and total phosphorus at the same time, and the operating cost is low

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