Pig farm waste water processing technology

A pig farm wastewater and treatment process technology, applied in animal husbandry wastewater treatment, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problems of high cost of subsequent sludge treatment, large amount of sludge produced, complex facilities, etc. , to achieve the effect of simple facilities, reduced processing costs, and low cost

Active Publication Date: 2018-07-10
WENZHOU VOCATIONAL COLLEGE OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still has the problems of high energy consumption, large amount of sludge generated, high cost of subsequent sludge treatment, complicated facilities, and the need for professional management

Method used

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  • Pig farm waste water processing technology
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  • Pig farm waste water processing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A pig farm wastewater treatment process, comprising the following steps:

[0034] Step A1, carrying out a solid-liquid separation of pig farm waste water through a sump, and the solid waste I obtained is used as a raw material for organic compound fertilizer; wherein, the hydraulic retention time of the sump is 0.2h;

[0035] In step A2, the liquid waste I obtained from the primary solid-liquid separation is subjected to a second solid-liquid separation through a biomultiplication biochemical reaction tank, and the solid waste II obtained in the second solid-liquid separation is subjected to calcium salt enhanced flocculation precipitation through a flocculation sedimentation tank, and the obtained precipitate is used for It is used for the recycling of phosphate fertilizer; the matrix filler of the flocculation sedimentation tank is set alternately with modified seaweed soft layer and modified coal gangue layer three times, a total of six layers; among them, compound ba...

Embodiment 2

[0041] A pig farm wastewater treatment process, comprising the following steps:

[0042] Step A1, carrying out a solid-liquid separation of pig farm waste water through a sump, and the solid waste I as a raw material for organic compound fertilizer; wherein, the hydraulic retention time of the sump is 0.3h;

[0043] In step A2, the liquid waste I obtained from the primary solid-liquid separation is subjected to a second solid-liquid separation through a biomultiplication biochemical reaction tank, and the solid waste II obtained in the second solid-liquid separation is subjected to calcium salt enhanced flocculation precipitation through a flocculation sedimentation tank, and the obtained precipitate is used for It is used for the recycling of phosphate fertilizer; the matrix filler of the flocculation sedimentation tank is set alternately with modified seaweed soft layer and modified coal gangue layer three times, a total of six layers; among them, compound bacteria are added ...

Embodiment 3

[0050] A pig farm wastewater treatment process, comprising the following steps:

[0051] Step A1, carrying out a solid-liquid separation of pig farm waste water through a sump, and the solid waste I obtained as a raw material for organic compound fertilizer; wherein, the hydraulic retention time of the sump is 0.25h;

[0052] In step A2, the liquid waste I obtained from the primary solid-liquid separation is subjected to a second solid-liquid separation through a biomultiplication biochemical reaction tank, and the solid waste II obtained in the second solid-liquid separation is subjected to calcium salt enhanced flocculation precipitation through a flocculation sedimentation tank, and the obtained precipitate is used for It is used for the recycling of phosphate fertilizer; the matrix filler of the flocculation sedimentation tank is set alternately with modified seaweed soft layer and modified coal gangue layer three times, a total of six layers; among them, compound bacteria ...

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Abstract

The invention discloses a pig farm waste water processing technology. The pig farm waste water passes through a water collecting pool for primary solid-liquid separation, an obtained solid waste I istaken as a raw material of an organic composite fertilizer, a liquid waste material I obtained through the primary solid-liquid separation passes through a biological multiplication biochemical reaction tank for secondary solid-liquid separation, a solid waste material II obtained through secondary solid-liquid separation passes through a flocculation sedimentation basin for calcium salt reinforcement of flocculent precipitate, the flocculent precipitate is used for recovering and utilizing a phosphate fertilizer, a liquid waste material II obtained through secondary solid-liquid separation issubjected to constructed wetland processing, and the liquid which reaches a discharge standard is obtained and then is discharged. The pig farm waste water processing technology has the advantages oflow energy consumption, less mud generation amount, low cost for subsequent mud processing, simple equipment, and no requirement for professional management.

Description

technical field [0001] The invention relates to the technical field of multistage treatment of wastewater, in particular to a process for treating wastewater from pig farms. Background technique [0002] The development of large-scale pig farming has resulted in excessively concentrated discharge of wastewater, causing serious pollution to the surrounding environment. For the treatment of pig farm wastewater, various localities have adopted a variety of different treatment modes. Pig farms that are small in scale or that have available land around them mostly adopt the mode of returning to the field or natural treatment; pig farms with a large scale or land shortage mainly adopt the engineering mode of treatment. In engineering mode treatment, anaerobic pretreatment is generally carried out first, and then aerobic treatment is carried out, because the BOD of anaerobic digestion liquid 5 / TN is low and often suffers from "acidification" in its aerobic post-treatment, COD an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/20
CPCC02F1/52C02F3/32C02F3/34C02F9/00C02F2103/20
Inventor 刘一江段龙川罗厚强
Owner WENZHOU VOCATIONAL COLLEGE OF SCI & TECH
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