Treatment method for low-carbon-source domestic wastewater

A technology for domestic sewage and treatment methods, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of increasing the cost of sewage treatment, and achieve high denitrification and phosphorus removal effect. , Improve biodegradability, reduce the effect of oxygenation

Inactive Publication Date: 2014-05-28
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these low C / N sewage, the current existing technology is to increase the C / N value by adding organic carbon sources to improve the effect of nitrogen and phosphorus removal. Obviously, adding organic carbon sources will inevitably increase the cost of sewage treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, a low-carbon source domestic sewage treatment method, the C / N of the treated sewage is 2.5, and the COD Cr , NH 3 -N and TP concentrations are 96mg / L, 30mg / L and 8.0mg / L respectively, the steps are as follows:

[0024] (1) Anaerobic digestion reactor with biofilm zeolite material as filler is used for anaerobic hydrolysis of sewage

[0025] The biofilm zeolite materials are assembled in a grid frame to form zeolite packing blocks, which are arranged in a layered staggered arrangement in the anaerobic digestion reactor. The filling rate of the biofilm zeolite materials is 30V%, and the sewage enters from the bottom of the reactor The reaction residence time is 4h; among them, the particle size composition of the zeolite is 50% for the size of +200 mesh to -100 mesh, and 50% for the size of +100 mesh to -50 mesh. The preparation of the biofilm zeolite material is as follows:

[0026] Add zeolite to the sludge in the anaerobic section, the sludge concentration...

Embodiment 2

[0032] In this embodiment, a low-carbon source domestic sewage treatment method, the C / N of the treated sewage is 3, and COD Cr , NH 3 -N and TP concentrations are 100mg / L, 35mg / L and 8.5mg / L respectively, the steps are as follows:

[0033] (1) Anaerobic digestion reactor with biofilm zeolite material as filler is used for anaerobic hydrolysis of sewage

[0034] The biofilm zeolite materials are assembled in a grid frame to form zeolite packing blocks, and are arranged in layers in an anaerobic digestion reactor. The filling rate of the biofilm zeolite materials is 40V%, and the sewage enters from the bottom of the reactor The reaction residence time is 6h; among them, the particle size composition of the zeolite is 70% for the size of +200 mesh to -100 mesh, and 30% for the size of +100 mesh to -50 mesh. The preparation of the biofilm zeolite material is as follows:

[0035] Add zeolite to the sludge in the anaerobic section, the sludge concentration is 5000mg / L, then pass into dome...

Embodiment 3

[0041] In this embodiment, a low-carbon source domestic sewage treatment method, the C / N of the treated sewage is 2.8, and the COD Cr , NH 3 -N and TP concentrations are 105mg / L, 33mg / L and 8.2mg / L respectively, the steps are as follows:

[0042] (1) Anaerobic digestion reactor with biofilm zeolite material as filler is used for anaerobic hydrolysis of sewage

[0043] The biofilm zeolite materials are assembled in a grid frame to form zeolite packing blocks, which are arranged in a layered staggered arrangement in the anaerobic digestion reactor. The filling rate of the biofilm zeolite materials is 35V%, and the sewage enters from the bottom of the reactor The reaction residence time is 7h; among them, the particle size composition of the zeolite is 60% for the size of +200 mesh to -100 mesh, and 40% for the size of +100 mesh to -50 mesh. The preparation of the biofilm zeolite material is as follows:

[0044] Add zeolite to the sludge in the anaerobic section, the sludge concentratio...

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Abstract

The invention discloses a treatment method for low-carbon-source domestic wastewater, wherein the domestic wastewater is treated through a dual-membrane process of anaerobic hydrolysis of a biological membrane zeolite and a fluidized ceramsite biological membrane filter, that is to say, the natural zeolite which is cultured by a biological membrane is taken as a filler to decompose organic matters hard to degrade in the wastewater into low molecular weight organic matters easy to degrade through the metabolism of anaerophyte, then the ceramsite is taken as a carrier to conduct aerobic treatment, and the biological membrane formed on the surface of the ceramsite fully degrades the organic matters in the wastewater. According to the invention, the carbon source in the wastewater is effectively utilized, so that a good nitrogen and phosphorus removal effect is achieved without adding any organic carbon source trophoplasm in the treatment of the low-carbon-source domestic wastewater.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method of low-carbon source domestic sewage. Background technique [0002] Nitrogen and phosphorus are the main reasons for the eutrophication of rivers and lakes, and nitrogen and phosphorus mainly come from urban sewage. In order to curb the eutrophication of surface water bodies, the state has set stricter standards for nitrogen and phosphorus emissions from sewage treatment plants, and therefore, the treatment of sewage requires higher nitrogen and phosphorus removal efficiency. [0003] In the process of biological treatment of sewage, sufficient carbon source is required for nitrogen and phosphorus removal. Conventional sewage treatment process, C / N﹥5 can only obtain high nitrogen and phosphorus removal effect and meet the emission requirements. However, the C / N of general domestic sewage is usually around 3, and that of rural sewage is even lower. For thes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 何国伟刘灵辉叶志平范彬何曾宇
Owner GUANGZHOU UNIVERSITY
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