Treatment technology of livestock and poultry breeding wastewater

A technology for livestock and poultry breeding wastewater and treatment process, which is applied in the field of sewage treatment, can solve the problems of difficulty in treatment, increased treatment costs, and high organic matter content, and achieves the effects of reducing oxygen demand and reducing energy consumption.

Inactive Publication Date: 2017-03-22
GUILIN SHIHUAN WASTE GAS TREATMENT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only that, the traditional biological denitrification process, such as A/O method, A 2 Aeration in the nitrification stage such as the /O method usually consumes a lot of energy. In order to neutralize the acidity generated during the nitrification process, alkali needs to be added to neutral

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  • Treatment technology of livestock and poultry breeding wastewater
  • Treatment technology of livestock and poultry breeding wastewater
  • Treatment technology of livestock and poultry breeding wastewater

Examples

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Example Embodiment

[0019] Example 1

[0020] After the livestock and poultry breeding wastewater is pretreated by the coarse grid, the aeration grit tank and the anaerobic tank, it passes through the primary sedimentation tank, the biological tank and the secondary sedimentation tank in sequence, and the biological tank includes an aerobic section and an anoxic section; The effluent from the primary sedimentation tank flows into the aerobic section and the anoxic section at the same time through the distribution well, 60% is distributed to the anoxic section, and the remaining 40% is distributed to the aerobic section; the effluent from the aerobic section enters the anoxic section for treatment, the anoxic section Part of the effluent is returned to the aerobic section, and the return rate is 40%. The remaining effluent enters the secondary sedimentation tank for precipitation and separation, and the effluent is discharged through the discharge port. Bentonite and grape seed tannin are added to the...

Example Embodiment

[0023] Example 2

[0024] After the livestock and poultry breeding wastewater is pretreated by the coarse grid, the aeration grit tank and the anaerobic tank, it passes through the primary sedimentation tank, the biological tank and the secondary sedimentation tank in sequence, and the biological tank includes an aerobic section and an anoxic section; The effluent from the primary sedimentation tank flows into the aerobic and anoxic sections at the same time through the distribution well, 80% is distributed to the anoxic section, and the remaining 20% ​​is distributed to the aerobic section; the effluent from the aerobic section enters the anoxic section for treatment, the anoxic section Part of the effluent is returned to the aerobic section, and the return rate is 50%. The remaining effluent enters the secondary sedimentation tank for precipitation and separation, and the effluent is discharged through the discharge port; the aerobic section is added with bentonite and grape see...

Example Embodiment

[0025] Example 3

[0026] After the livestock and poultry breeding wastewater is pretreated by the coarse grid, the aeration grit tank and the anaerobic tank, it passes through the primary sedimentation tank, the biological tank and the secondary sedimentation tank in sequence, and the biological tank includes an aerobic section and an anoxic section; The effluent from the primary sedimentation tank flows into the aerobic and anoxic sections at the same time through the distribution well, 70% is distributed to the anoxic section, and the remaining 30% is distributed to the aerobic section; the effluent from the aerobic section enters the anoxic section for treatment, the anoxic section Part of the effluent returned to the aerobic section with a return rate of 45%. The remaining effluent enters the secondary sedimentation tank for sedimentation and separation, and the effluent is discharged through the discharge port. Bentonite and grape seed tannin are added to the aerobic section...

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Abstract

The invention discloses a treatment technology of livestock and poultry breeding wastewater. The technology comprises steps as follows: sewage is pretreated and then sequentially passes through a primary sedimentation tank, a biological tank and a secondary sedimentation tank for treatment, wherein the biological tank comprises an aerobic zone and an anoxic zone; effluent of the primary sedimentation tank passes through a distribution well and flows into the aerobic zone and the anoxic zone simultaneously, effluent of the aerobic zone enters the anoxic zone for treatment, part of effluent of the anoxic zone flows back to the aerobic zone, the rest of effluent enters the secondary sedimentation tank for precipitation separation, and effluent is discharged from a discharge port; bentonite and grapestone tannin are added to the aerobic zone, and a weight ratio of bentonite to grapestone tannin is (1-3):(0.5-1.8). With the adoption of the technology, ammonia nitrogen in sewage can be rapidly and effectively removed.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a treatment process for livestock and poultry breeding wastewater. Background technique [0002] Nitrogen is a very important pollution factor in the water environment. With the development of petrochemical, food and pharmaceutical industries and the improvement of people's living standards, the nitrogen content in urban sewage, industrial sewage and garbage permeate has risen sharply. Nitrogen in sewage The main forms of nitrogen are molecular nitrogen, organic nitrogen, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen, and in the untreated raw wastewater, organic nitrogen and ammonia nitrogen are the main forms of nitrogen; Ammonia nitrogen and nitrate nitrogen are the main forms of nitrogen in the effluent after secondary biochemical treatment. According to reports, urban domestic sewage, industrial wastewater, and livestock and poultry breeding wa...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/20
CPCC02F1/001C02F3/302C02F9/00C02F2001/007C02F2103/20C02F2301/08
Inventor 莫显坤
Owner GUILIN SHIHUAN WASTE GAS TREATMENT EQUIP
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