A method for in-situ aerobic denitrification treatment and purification of aquaculture sewage

Abstract

The invention relates to the technical field of in-situ advanced treatment and purification of sewage, in particular to a method for in-situ aerobic denitrification treatment and purification of aquaculture sewage. Feces and residual bait in the culture pond are treated and mixed with compound bacteria, antibiotics, high-carbon alcohol fatty acid ester complexes, and microbial flocculants for fermentation and culture. Sediment; add organic carbon source to the fermented liquid obtained from cultivation, mix it and spray it on the surface of aquaculture animal feed to obtain heterooxygenation-aerobic denitrifying bacteria spray feed; mix the obtained microbial flocculation sediment with the spray feed and add it In the aquaculture pond to be treated, the aquaculture animals in the aquaculture pond can be eaten; adjust the water body in the aquaculture pond, add compound bacteria to the aquaculture water body, and then form a heterotrophic nitrification-aerobic denitrification functional active bacterial floc in the water body that can purify the water body ;Using the above-mentioned obtained substances to realize in-situ aerobic denitrification advanced treatment of the water body in the culture pond, and remove organic matter, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen.

Description

technical field [0001] The invention relates to the technical field of in-situ advanced treatment and purification of sewage, in particular to a method for in-situ aerobic denitrification treatment and purification of aquaculture sewage. Background technique [0002] Factory farming is an important way of modern fish farming. The water environment pollution and frequent aquatic diseases caused by large-scale industrial farming have seriously plagued and hindered the development of my country's aquaculture industry. The massive discharge of aquaculture wastewater has a great impact on the water quality of offshore aquaculture waters. At the same time, the increasingly serious offshore pollution has caused great threats and harm to mariculture, which has increased the cost of water treatment for industrial aquaculture. As a technology-intensive factory farming model, the in-situ purification treatment technology of aquaculture water has the advantages of less damage to the ec...

AI Technical Summary

Problems solved by technology

However, through research and conclusion, it is found that the above-mentioned technologies only promote the assimilation of ammonia nitrogen in water to generate organic nitrogen by adding a large amount of organic carbon sources, rather than removing nitrogen pollutants from water, and the oxygen consumption High, when the ventilation is insufficient, it is easy to cause the accumulation of ammonia nitrogen and nitrite, this shortcoming limits the wide application of this technology in the field of water treatment

At present, no heterotrophic nitrification-aerobic denitrification active bacterial clusters have been prepared and formed flocs through cultivation. Under the condition of low carbon consumption, the bacterial cluster flocs with heterotrophic nitrification-aerobic denitrification activities can use limited organic carbon. A report on the conversion of part of the ammonia nitrogen in the water of aquaculture ponds into the organic nitrogen of the active bacterial flocs, and at the same time, the conversion of most of the remaining nitrogen pollutants into nitrogen gas for removal, and the realization of in-situ aerobic denitrification treatment and purification of the aquaculture water.