Method for treating waste pollutants in pig farm

A treatment method and pig farm technology, applied in the field of agricultural environment, can solve the problems of loss, accumulation of nitrogen and phosphorus in farmland, direct discharge of waste pollutants, etc., and achieve the effect of strong absorption capacity, simple operation and good treatment effect

Active Publication Date: 2013-01-16
大长江环境工程技术有限责任公司
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  • Application Information

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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 th

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  • Method for treating waste pollutants in pig farm

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Embodiment 1

[0022] A kind of 80-100 small scale pig farm wastewater treatment method, it comprises the following steps:

[0023] A. Build 50m 3 Digester.

[0024] B. First-class ecological wetland treatment (first-class wetland area 100-120m 2 ), plant Myriophylium clatinoides, and store water at a depth of 8-12cm. The growth of foxtail algae is large (it can be harvested 5-8 times a year, and the harvested dry matter is 900-1000kg / 100m 2 ), the absorption of nitrogen and phosphorus is large (the nitrogen content in the plant is 30.72g.kg -1 , the phosphorus content is 1.25g.kg -1 ), equivalent to 100m 2 The ecological wetland absorbs and absorbs 27.65-30.72kg nitrogen and 1.13-1.25kg phosphorus a year. After being harvested, foxtail algae can be used as covering materials (green manure) for tea gardens and orchards, or processed into feed.

[0025] C. Secondary economic wetland treatment (secondary wetland area 440-460m 2 ): plant perennial water celery (Oenathejavantica) in wint...

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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 specifically relates to a method for treating waste pollutants in small pig farms with a scale of 80-100 pigs, especially suitable for the treatment of waste pollutants in subtropical small pig farms to achieve standard discharge. 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 environment problem facing our country. For example, several large lakes (Taihu Lake, etc.) Rivers, etc.) and streams are often silted up by water hyacinth, blocking river courses and affecting the normal reproduction and growth of aquatic organisms such as fish. The control of water eutrophication often takes engineering measures (removing lake silt, carrying out domestic sewage treatment, etc.); land treatment (purifying sewage through soil filtration, adsorption, precipitation, io...

Claims

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Application Information

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IPC IPC(8): C02F9/14A01G1/00A01K61/00C02F3/32
CPCY02A40/81Y02W10/10
Inventor 肖润林吴金水刘锋张树楠李红芳
Owner 大长江环境工程技术有限责任公司
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