Method for removing low-concentration ammonia nitrogen in water body through biological adsorption

Abstract

The invention particularly relates to a method for removing low-concentration ammonia nitrogen in a water body through biological adsorption. The method comprises: preparing a biomass adsorbent material; loading metal ions on the biomass adsorbent material; and pouring the adsorbent material in wastewater or water body containing ammonia nitrogen components to immobilize the ammonia molecules in the aqueous medium onto the metal ion-loaded biomass adsorbent particle material so as to achieve the adsorption removal purification of the ammonia nitrogen components in the water body, wherein the adsorbed ammonia nitrogen molecules can be subjected to dilute acid desorption, concentration and recovery, and the adsorbent material can be repeatedly used multiple times. According to the present invention, the method has characteristics of simple operation, easy performing and no secondary pollution, the used raw and auxiliary materials are inexpensive and easy to obtain, the scale can be largeor small, the adsorbent material can be used in large-watershed water bodies, and can further be used in specially-designed reactors, and the method is the advanced technology used for treating low-concentration ammonia nitrogen water medium and having the application prospects due to the characteristics of high efficiency, economy, strong adaptability and the like.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for removing low-concentration ammonia nitrogen in water by biological adsorption. Background technique [0002] Due to the uncontrolled discharge of domestic wastewater and industrial wastewater and the extensive use of chemical fertilizers, the ammonia nitrogen content in natural water bodies is generally high. Ammonia nitrogen exceeding the standard will lead to eutrophication of water bodies (such as causing aquatic plants, algae and microorganisms to multiply and seriously consume dissolved oxygen in water bodies), directly affecting the benign development of the natural ecological environment. The lethal concentration of ammonia to fish is 0.2-2 mg / L, and farmers are very troubled by the eutrophication of water bodies. The state has formulated very strict control standards for the discharge of ammonia nitrogen, and various relevant enterprises have also adopted various ...

AI Technical Summary

Problems solved by technology

For the treatment of low-concentration ammonia nitrogen wastewater, the ion exchange method has simple process, convenient operation, and low investment, but the amount of resin or zeolite is large, regeneration is difficult, and the cost is high. The biological denitrification method is mature, but the process is long and the reactor is large. , occupies a large area, often requires additional carbon sources, consumes a lot of energy, and takes a long time. Therefore, it is urgent to develop new technologies that are more economical, faster, and more convenient to process low-concentration ammonia nitrogen.

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