Method for in-situ aerobic denitrification treatment purification of aquaculture sewage

Abstract

The invention relates to the technical field of in-situ advanced treatment purification of sewage, and in particular relates to a method for in-situ aerobic denitrification treatment purification of aquaculture sewage. The method comprises the following steps: fecal residual bait in a culture pond is taken out and treated, the treated bait, composite strains, antibiotics, a high-carbon alcohol fatty acid ester complex and a microbial flocculating agent are mixed for fermentation cultivation, and a precipitate obtained by the cultivation is a microbial flocculation precipitate with a heterotrophic nitrification-aerobic denitrification function; an organic carbon source is added into the fermentation broth obtained by the cultivation, uniform mixing is performed, and the mixed material is sprayed to the surface of feed of aquaculture animals to obtain heterotrophic nitrification-aerobic denitrifying bacteria spraying feed; the obtained microbial flocculation precipitate and the sprayingfeed are mixed, and the mixed material is thrown into the culture pond to be treated for eating of the aquaculture animals in the culture pond; and a water body in the culture pond is regulated, composite strains are added into the culture water body, and therefore active bacterium cluster floc with the heterotrophic nitrification-aerobic denitrification function capable of purifying the water body is formed in the water body. According to the method provided by the invention, the above obtained substances are utilized, so that in-situ aerobic denitrification advanced treatment of the water body in the culture pond is realized, and organic matter, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are removed.

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.