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Method for treating pig farm waste pollutant

A treatment method and pollutant 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 low construction cost, simple operation, easy promotion and application

Active Publication Date: 2015-03-04
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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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 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

Method used

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  • Method for treating pig farm waste pollutant
  • Method for treating pig farm waste pollutant
  • Method for treating pig farm waste pollutant

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Embodiment 1

[0030] In Jiaxing Wufeng Animal Husbandry Co., Ltd., Xinfeng Town, Nanhu District, Jiaxing City, Zhejiang Province (6,000 live pigs, about 40 tons of wastewater per day; COD content in wastewater is 10,200 mg / L, ammonia nitrogen content is 1,750 mg / L, and total phosphorus content is 154 mg / L L) A treatment method for pig farm waste pollutants established, which includes the following steps:

[0031] 1. First-level biomass purification pool 2 treatment: build a 20m (length) × 20m (width) × 1.5m (deep) biomass purification pool, put four tons of straw (the straw will gradually flood, and need to add three or about four tons of straw), pig farm waste is separated from solid and liquid, and the waste water is directly sent to the biomass purification tank for treatment. Compared with the inlet water, the ammonia nitrogen content of the first-level biomass purification water is reduced by 12.6%, and the total nitrogen content can be reduced by 13.5%. The COD content decreased by 18...

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Abstract

The present invention discloses a method for treating pig farm waste pollutants, including the steps of: A, first-stage biomass purification treatment, including constructing a biomass purification tank, putting straw in, adding straw every 4-5 months, and feeding waste water from solid-liquid separation of pig farm waste into the biomass purification tank for processing; B, second-stage biomass purification treatment, including constructing a biomass purification tank, putting straw in, adding straw every 4-5 months, and feeding waste water from first-stage biomass purification into the second-stage biomass purification tank; C, first-stage watermifoil wetland treatment; D, second-stage watermifoil wetland treatment; E, third-stage biomass purification treatment; and F, fourth-grade watermifoil ecological wetland treatment, wherein the C, D, E, F are planted with green watermifoil. The method is easy to operate and low in cost, does not need running cost, and is suitable for application in intensive pig farms in most subtropical regions of middle and lower reaches of Yangtze River.

Description

technical field [0001] The present invention relates to the field of agricultural environment, and more specifically relates to a medium-sized large-scale pig farm (5000-7000 live pigs in stock, 10000-15000 live pigs for slaughter each year; 40-50 tons of waste water per day, and the COD content in the waste water is 9000-11000mg / L, ammonia nitrogen content 1600-2200mg / L, total phosphorus content 140-170mg / L) waste pollutant treatment method, especially suitable for the treatment of waste pollutants in medium-sized and large-scale pig farms in the subtropical zone to 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 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 reprod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 肖润林吴金水刘锋李裕元张树楠李红芳蔡立阳何阳白志辉
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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