Nitrification and denitrification integrated water treatment system

Abstract

The invention discloses a nitrification and denitrification integrated water treatment system. The system comprises an oxygen reduction electrolytic bath and a denitrification electrolytic bath, after being filtered, water in a culture pond is selectively input into the oxygen reduction electrolytic bath for nitration reaction or input into the denitrification electrolytic bath for denitrification reaction according to needs, and then flows back into the culture pond. In addition, effluent of the oxygen reduction electrolytic bath can pass through a flow type ultraviolet sterilizer and then flow back to the culture pond. The system provided by the invention does not need the participation of a traditional biological filter, can avoid the influence of water temperature on the biological filter system, and can efficiently realize the removal of ammonia nitrogen at the same time; and in addition, the arranged denitrification electrolytic bath can reduce the nitrate concentration in the water body system, and water changing operation in the system operation process is avoided.

Description

technical field [0001] The invention discloses a nitrification and denitrification integrated water treatment system, which can be used in a freshwater circulating aquaculture system and belongs to the field of aquaculture equipment. Background technique [0002] In the recirculating aquaculture system, because the metabolites of the cultured objects, food residues and other proteins cannot be decomposed in time, the rapid accumulation of ammonia nitrogen and nitrite in the water body is caused. , these factors will cause the rapid deterioration of the aquaculture water, and even cause a large number of deaths of the aquaculture objects, causing huge economic losses. Because ammonia nitrogen and nitrite are highly toxic to the aquaculture objects, they are important water pollutants in the current aquaculture process. Studies have shown that 1kg of fish can produce 1.5g of ammonia nitrogen per day. Data show that the maximum long-term tolerance limit of fish to molecular a...

AI Technical Summary

Problems solved by technology

However, the growth process of microorganisms is easily affected by temperature. Once the temperature drops, the activity of microorganisms will weaken, resulting in the failure of the water treatment system.

In order to avoid the accumulation of nitrate in the aquaculture system, it is usually necessary to change the water of the recirculating aquaculture water body. The daily water exchange rate of the general system reaches about 15%, resulting in a large amount of waste of water resources and environmental eutrophication.

Images