Enhanced denitrification wastewater treatment method and device for circulating water culture system

Abstract

The invention discloses an enhanced denitrification wastewater treatment method and device for a circulating water culture system. The method comprises the following steps: (A) filtering wastewater by virtue of a whole-stainless-structure mechanical grating; (B) pumping the treated wastewater into an anaerobic ammonia oxidation tank by a water pump, and carrying out denitrification; (C) introducing the treated wastewater into an intermediate settling tank to remove suspended solids out of water; (D) introducing the treated wastewater into a composite vertical flow artificial wetland, so as to further remove impurities out of the wastewater; and (E) introducing the treated wastewater into an aeration tank for aeration oxygenation, wherein indexes of ammonia nitrogen, organic matters, suspended solids and the like in effluent reach the I-II water body standards. The device comprises the mechanical grating, a water collection well, the anaerobic ammonia oxidation tank, combined fillings, the intermediate settling tank, a downstream tank, downstream tank fillings, an upstream tank, upstream tank fillings, downstream tank plants, upstream tank plants and the aeration tank. According to the method and the device, water for aquaculture is purified and recycled, the treatment effect is good, and the maintenance is convenient.

Description

technical field [0001] The invention belongs to the technical field of aquaculture wastewater treatment, and in particular relates to a treatment method for enhanced denitrification of wastewater used in a circulating aquaculture system, and also relates to a device for enhanced denitrification of wastewater used in a circulating aquaculture system, which is suitable for most Factory high-density recirculating aquaculture systems, and some rural areas where water resources are scarce and lack or even have no centralized wastewater treatment system. Background technique [0002] The Recirculating Aquaculture System (RAS) is a farming model that introduces wastewater treatment processes in the aquaculture production process to control water quality, reduce water consumption, and improve product yield and quality. The recirculating aquaculture system maintains a relatively stable ecological environment suitable for the growth of aquaculture objects through the purification and ...

AI Technical Summary

Problems solved by technology

[0007] The anaerobic ammonium oxidation process can specifically remove ammonia nitrogen in wastewater, but the purification effect on other pollutants is not ideal

Although the composite vertical flow constructed wetland can comprehensively remove various pollutants in medium and low concentration organic wastewater, because the concentration of ammonia nitrogen in high-density circulating aquaculture wastewater is often high, its ammonia nitrogen purification effect is difficult to directly meet the standards for fishery water

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