Method for quickly treating excrement wastewater in large-scale dairy farm

Abstract

The invention provides a method for quickly treating excrement wastewater in a large-scale dairy farm and particularly provides a biological coagulation oxidation technology, belonging to the technical field of environment engineering. The method mainly adopts a biological flocculation tank, a sedimentation tank, a slag collecting tank, a biological coagulation reaction tank, solid-liquid separation equipment, a microbe culture tank, a water collecting tank and a biological oxidation treatment tank. The method is characterized in that a specific microbe (heterotrophic klebsiella F1 with the preservation number of CGMCC No.3032) is used for generating a biological flocculant, the biological flocculant polymerizes with SS, COD, ammonia nitrogen and total phosphorus in the excrement wastewater in the dairy farm through the effects of absorption bridging, charge neutralization and sweeping so as to generate sediments, the solid-liquid separation equipment is further used for separating, the separated excrement sediments are used for producing organic fertilizers, and the separated wastewater is subjected to further biological oxidation treatment to realize up-to-standard discharge.

Description

1. Technical field [0001] The invention relates to a biological flocculant-specific heterotrophic bacterium F1 that produces a flocculant, which acts on large-scale dairy farm manure and wastewater, and then performs deep slag removal and biological oxidation. It belongs to the technical field of environmental engineering. 2. Background technology [0002] In recent years, the transformation and upgrading of my country's dairy farming from free-range dairy farmers to large-scale, modern, intensive and standardized development has accelerated, which has enabled my country's dairy farming industry to flourish. According to incomplete statistics, as of 2012, there were 3,585 large-scale dairy farms in my country with an annual herd of more than 500 cows, of which 35% had an annual herd of more than 1,000 cows. While the dairy farming industry is developing rapidly, a large amount of manure will be produced, including cow manure and comprehensive wastewater (mixture of cow urine...

AI Technical Summary

Problems solved by technology

[0003] In order to facilitate the follow-up treatment and resource utilization of fresh manure from dairy farms, solid-liquid separation is an important measure adopted by most pastures in recent years, but the "thick slurry water" produced after solid-liquid separation has both COD and SS content. As high as 70,000mg / L, these thick slurry water and comprehensive wastewater, according to the traditional anaerobic biogas generation-aerobic biochemical treatment mode, not only takes a long time (usually more than 15d), but also the treated water is still difficult to meet the standard, and the color is darker

The reason is that the SS and inert COD in the fecal wastewater entering the traditional anaerobic digester are too high, and the hydraulic retention time (HRT) is relatively short (mostly around 5d).

[0004] In view of the shortcomings of the existing dairy farm manure wastewater treatment process, such as long treatment cycle, substandard effluent quality, and high operating costs, the present invention provides a method for rapidly treating large-scale dairy farm manure wastewater

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