Biological tannery wastewater treatment system and treatment method thereof

A technology for biological treatment and tanning wastewater, applied in animal processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve significant economic and social benefits, low energy consumption, convenient operation and maintenance Effect

Active Publication Date: 2014-05-14
ZHONGNIU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention adds compound microorganisms and activated carbon at one time, so that nitrifying bacteria in the aerobic tank become the dominant bacteria, the COD removal rate is 80~90% (220~308 mg / L), the ammonia nitrogen removal rate is 80~90% (1.9~ 29 mg / L), still does not meet the relevant national standards

Method used

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  • Biological tannery wastewater treatment system and treatment method thereof
  • Biological tannery wastewater treatment system and treatment method thereof
  • Biological tannery wastewater treatment system and treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] see figure 2 and image 3 The biological treatment system for tannery wastewater in this embodiment includes a one-stage grid aeration tank, an advection sedimentation tank, a second-stage grid aeration tank and a radial flow sedimentation tank connected in sequence, wherein the bottom of the advection sedimentation tank passes through The reflux pump is connected to the feed port of the first-stage grid aeration tank, and the bottom of the radial flow sedimentation tank is connected to the feed port of the second-stage grid aeration tank through the reflux pump.

[0044] The first-stage grid aeration tank is a grid-shaped multi-stage aeration tank, which is equipped with 9 series treatment grids. The liquid inlet and liquid outlet of each treatment grid are arranged diagonally, and a half wall is set in the middle of the treatment grid. The height is 1 / 3~1 / 2 of the wall height of the treatment cell, and the half wall divides the lower part of the treatment cell into ...

Embodiment 2

[0048] The biological treatment system for tannery wastewater in this embodiment includes a first-stage grid aeration tank, an advection sedimentation tank, a second-stage grid aeration tank, and a radial flow sedimentation tank connected in sequence, wherein the bottom of the advection sedimentation tank is passed through the back flow The pump is connected to the feed port of the first-stage grid aeration tank, and the bottom of the radial flow sedimentation tank is connected to the feed port of the second-stage grid aeration tank through a return pump.

[0049] The first-stage grid aeration tank is a grid-shaped multi-stage aeration tank, which is equipped with 3 series treatment grids, the liquid inlet and liquid outlet of each treatment grid are arranged diagonally, and a half wall and a half wall are set in the middle of the treatment grid. The height is 1 / 3~1 / 2 of the wall height of the treatment cell, and the half wall divides the lower part of the treatment cell into t...

Embodiment 3

[0053] The biological treatment system for tannery wastewater in this embodiment includes a first-stage grid aeration tank, an advection sedimentation tank, a second-stage grid aeration tank, and a radial flow sedimentation tank connected in sequence, wherein the bottom of the advection sedimentation tank is passed through the back flow The pump is connected to the feed port of the first-stage grid aeration tank, and the bottom of the radial flow sedimentation tank is connected to the feed port of the second-stage grid aeration tank through a return pump.

[0054] The first-stage grid aeration tank is a grid-shaped multi-stage aeration tank, which is equipped with 6 serial treatment grids. The liquid inlet and liquid outlet of each treatment grid are arranged diagonally, and a half wall is set in the middle of the treatment grid. The height is 1 / 3~1 / 2 of the wall height of the treatment cell, and the half wall divides the lower part of the treatment cell into two disconnected s...

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Abstract

The invention belongs to the field of sewage treatment and relates to a biological treatment method for high-concentration wastewater with high ammonia nitrogen content, in particular to a biological tannery wastewater treatment system and a treatment method thereof. The biological tannery wastewater treatment system comprises a first-stage gridding aeration tank, a horizontal flow sedimentation tank, a second-stage gridding aeration tank and a radial flow sedimentation tank which are communicated sequentially, wherein the bottom of the horizontal flow sedimentation tank is communicated with a material inlet of the first-stage gridding aeration tank through a backflow pump; and the bottom of the radial flow sedimentation tank is communicated with a material inlet of the second-stage gridding aeration tank through the backflow pump. According to the treatment method, the organic degrading proportion and the denitration function of the system are enhanced by two-stage aeration. The treatment system and the treatment method which are disclosed by the invention has the advantages that the treatment effect is obvious, running maintenance is facilitated, the energy consumption is low, and the treatment cost is low; and obvious economical and beneficial benefits are realized.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a biological treatment method for high-concentration and high-ammonia-nitrogen wastewater, in particular to a biological treatment system and a treatment method for tannery wastewater. technical background: [0002] Tannery wastewater is one of the most polluting and most difficult to treat industrial wastewater. With the development of the economy, the leather industry is still in the stage of continuous expansion, and the tannery wastewater produced seriously pollutes the environment. At the same time, heavy pollution has also become one of the obstacles restricting the development of the leather industry. The main characteristics of tannery wastewater are high pollutant concentration, complex composition, and a large amount of toxic and harmful substances. Generally, the initial concentration of pollutants in leather wastewater is COD: 10000-20000mg / L, BOD: 2000-4000mg / L, ammon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/24
Inventor 范恩源范长华张克专
Owner ZHONGNIU GRP
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