Method for treating waste pollutants in pig farm

Abstract

The invention discloses a method for treating waste pollutants in a pig farm. The method comprises the following steps of: A, performing anaerobic treatment on a biogas generating pit, namely building the biogas generating pit, performing anaerobic treatment on waste pollutants, which enter the biogas generating pit, in the pig farm, and killing parasites and pathogenic microorganisms through anaerobic fermentation, wherein the chemical oxygen demand (COD) content is reduced, and the normal growth of aquatic plants in a wet land is facilitated; B, performing primary ecological wet land treatment, namely planting green watermifoil, growing the green watermifoil, absorbing nitrogen and phosphorus, harvesting the watermifoil as materials covering a tea yard and a fruit yard; C, treating secondary wet land treatment, namely planting perennial bengal waterdropwort herb in winter, planting aquatic water spinach in summer, and harvesting the water spinach and the perennial bengal waterdropwort herb from the wet land each year; D, treating a tertiary economical wet land, namely planting perennial bengal waterdropwort herb in windter, planting lotus root in summer, putting natural crucians into the wet land, and harvesting the lotus root, the bengal waterdropwort herb and water products from the wet land each year. The construction cost and the running cost are low; the method is easy to operate; the nitrogen, the phosphorus and the COD (Chemical Oxygen Demand) in the waste in the pig farm can be greatly treated; and the method is extremely good in popularization and application prospect.

Description

technical field [0001] The invention relates to the field of agricultural environment, and more particularly to a method for treating waste pollutants in small pig farms with a scale of 80-100 heads, which is especially suitable for the treatment of waste pollutants in subtropical small pig farms to achieve discharge standards. Background technique [0002] In recent years, with the rapid development of the economy, the eutrophication of water bodies in rivers and lakes has gradually become an important ecological and environmental problem facing my country. For example, several large lakes (Taihu Lake, etc.) Water hyacinth, etc.) and streams are often silted up by water hyacinth, blocking the river channel and affecting the normal reproduction and growth of fish and other aquatic organisms. The treatment of water eutrophication often takes engineering measures (removal of lake sludge, domestic sewage treatment, etc.); land treatment (purification of sewage through soil filtr...

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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