Compound treatment method of wastewater in pig farm

A technology for composite treatment of pig farm wastewater, applied in animal husbandry wastewater treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of high operating costs and achieve low treatment costs

Inactive Publication Date: 2009-09-16
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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Problems solved by technology

[0006] Question: One is COD cr 、BOD 5 Exceeded the standard; the ...

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  • Compound treatment method of wastewater in pig farm

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[0011] Taking intensive pig farms in the Sichuan Basin as an example, new technologies of biological-ecological composite treatment and resource utilization are used to treat pig farm wastewater. The design water flow rate is 5m 3 / h, the designed daily inflow flow rate is 80m 3 . Most of these intensive pig farms pre-treat pig farm wastewater by building standardized biogas digesters and sedimentation tanks, but the COD of the treated water cr 、BOD 5 , NH 3 -The concentration of N and SS is still quite high and the water quality fluctuates greatly, which cannot meet the national livestock and poultry breeding industry pollutant discharge standards, and has great damage to the surrounding soil and water environment, so further biological-ecological composite treatment is required. And realize the resource utilization of pig farm wastewater. The biological-ecological composite treatment of intensive pig farm wastewater adopts the following combination process:

[0012] ...

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Abstract

The invention belongs to the technical field of wastewater treatment and relates to a new wastewater treatment technology which achieves decontamination and resource of wastewater by utilizing a biological-ecological compound treatment technology for purify and intensify the wastewater in a pig farm. The invention comprises the steps of: using a coarse and fine grid for implementing preliminary solid-liquid separation to the wastewater in a pig farm so as to remove part of the solids, later using a methane tank for implementing anaerobic processing and realizing the hydrolytic acidification of the wastewater, and generating clean energy for the use in farms and the surrounding farmers; implementing further removal of the particles in the wastewater by a sedimentation tank, a grid slot, and an inclined tube sedimentation tank, and then adopting a biological contact oxidation pond-anaerobic baffle plate biological film for implementing biological treatment to the wastewater so as to effectively remove the majority of pollutants in wastewater, and finally using a composite eco-pond for further treatment of the yielding water of the biological treatment section. The invention not only can achieve standard wastewater discharge, but also can create economic benefits by the aquatic economic plants in the pond and achieve water resource.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and relates to a new waste water treatment technology for purifying intensive pig farm waste water by using biological-ecological compound treatment technology to realize harmless and resourceful waste water. Background technique [0002] Intensive pig farm wastewater mainly comes from pig manure, pig urine and pig pen flushing water, which has the characteristics of large discharge, high organic matter concentration and high ammonia nitrogen content. According to surveys and estimates, the main water quality indicators of pig farm wastewater separated from wet and dry are: COD cr 5000~10000mg / L, MLSS 1000~5000mg / L. [0003] Large-scale livestock and poultry farm wastewater treatment and comprehensive utilization technologies include the following processes: natural biological treatment method, aerobic treatment method, anaerobic treatment method, anaerobic-aerobic combined treatm...

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F3/30C02F3/32C02F103/20
CPCY02W10/10
Inventor 袁世斌董微李旭东
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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