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Treatment method of wastewater anaerobic digestive fluid in pig farm

A technology for anaerobic digestion and pig farm wastewater, applied in anaerobic digestion treatment, chemical instruments and methods, animal husbandry wastewater treatment, etc., can solve the problems of large area, excessive algae, low treatment efficiency

Inactive Publication Date: 2011-05-04
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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Problems solved by technology

[0004] Aiming at the disadvantages of the traditional stable pond treatment method, such as large floor area, low treatment efficiency, and excessive algae production, the present invention proposes a comprehensive ecological pond system treatment method for pig farm wastewater anaerobic digestion liquid

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Embodiment Construction

[0008] A medium-sized farm has 8,000 pigs in stock, including 1,500-2,000 suckling pigs, 4,000-5,000 adult pigs, and 1,000-2,000 breeding pigs. The average daily wastewater discharge is 150-200m 3 , See Table 1 for wastewater quality and discharge standards. In the specific implementation process, according to the two different emission standards listed in Table 1, they are designed respectively.

[0009] Table 1 List of Pollutant Concentrations in Pig Farm Wastewater

[0010] sequence

No

project

Pig Farm Wastewater

Anaerobic digestion

Liquid

GB18596

-2001 standard

GB 5084-92(

dry farming) standard

1

pH

6～8

6～8

2

COD Cr (mg / L)

≤2500

1500

≤400

≤300

3

BOD 5 (mg / L)

≤1100

650

≤150

≤150

4

NH 3 -N (mg / L)

≤800

600

≤80

5

Kjeldahl Nitrogen

≤850

750

≤...

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Abstract

The invention belongs to the technical field of wastewater treatment, particularly relates to a treatment method of wastewater anaerobic digestive fluid in a pig farm. The invention uses a water hyacinth pond for removing most of the ammonia nitrogen of wastewater anaerobic digestive fluid in a pig farm, later adopts large-scale emergent aquatic plant pond of water bamboo, reeds, and the like, combines artificial float grass and functional microbial inoculum for purifying the yielding water again so as to lead the concentration of ammonia nitrogen in the yielding water to be further reduced, and then adopts an aquatic animal breeding pond with landscape value for purification treatment. The invention not only can achieve standard discharge of the intensive pig farm wastewater anaerobic digestive fluid, but also can create economic benefits by the aquatic economic plants and aquatic animals in the pond and achieve water resource.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment method for pig farm waste water anaerobic digestion liquid. Background technique [0002] Since the 1950s, my country began to study the sewage treatment technology of the stabilization pond. In the 1980s, the National Environmental Protection Agency presided over the research on the traditional stabilization pond technology listed as the national "Seventh Five-Year Plan" and "Eighth Five-Year Plan" scientific and technological research projects. Many valuable research results have been obtained. There are many traditional stabilization ponds in our country, which have played a very important role in the control of water pollution in the suburbs and rural areas. However, the traditional stabilization pond has the following main disadvantages: large area; poor waterproof measures at the bottom of the pond, sewage is e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/28C02F3/32C02F103/20
CPCY02W10/10
Inventor 袁世斌董微李旭东
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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