Method for reducing and controlling wastewater pollution of pig farm

Abstract

The present invention discloses a method for reducing and controlling wastewater pollution of pig farm, comprising the steps of: A, using a solid-liquid separation facility for performing solid-liquid separation of pig farm waste, stacking the solid waste for fermentation to produce an organic fertilizer; B, building a four-level biomass purification tank treatment system, constructing biomass purification tanks which are connected by pipes, putting straw in the biomass purification tank of each level; C, building a five-level green watermifoil ecological wetland treatment system including ecological wetlands which are naturally divided by ridges, planting green watermifoil, culturing the green watermifoil into a plant population, keeping an up level ecological wetland and a down level ecological wetland including a first level ecological wetland, a second level ecological wetland and a third level ecological wetland to facilitate the flow and purification of waste water. The method is easy to operate and low in construction cost, does not need running cost, and is suitable for application and promotion in pig farms in the majority of sub-tropical areas in middle and lower reaches of the Yangtze River.

Description

technical field [0001] The present invention relates to the field of agricultural environment, and more specifically relates to a large-scale pig farm (50,000-80,000 pigs in stock, 100,000-150,000 pigs for slaughter each year; 500-800 tons of waste water per day, and a COD content of 6000 tons in the waste water. -9000mg / L, ammonia nitrogen content 1600-2200mg / L, total phosphorus content 140-170mg / L) waste pollutant treatment method, especially suitable for the reduction and control of waste pollutants in subtropical large-scale pig farms, and achieve discharge standards. Background technique [0002] In recent years, with the rapid development of the economy, the eutrophication of rivers and lakes has gradually become an important ecological environmental problem facing our country. For example, several large lakes (Taihu Lake, Chaohu Lake, Dianchi Lake, etc.) and their surrounding areas frequently broke out "cyanobacteria", Many large and small rivers (Beijing-Hangzhou Gra...

AI Technical Summary

Problems solved by technology

Because my country's current planting industry and aquaculture industry are seriously out of touch, the excessive application of nitrogen and phosphorus chemical fertilizers in the planting industry has led to a large amount of nitrogen and phosphorus accumulation and loss in farmland; the waste pollutants in the aquaculture industry are directly discharged

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