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Treatment method for low-carbon-source domestic wastewater

A domestic sewage and treatment method technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of increasing sewage treatment costs and achieve high nitrogen and phosphorus removal effects , reduce the amount of oxygenation, improve the effect of biodegradability

Inactive Publication Date: 2013-04-10
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 treated sewage C / N is 2.5, COD Cr , NH 3 The concentrations of -N and TP are 96mg / L, 30mg / L and 8.0mg / L respectively, and the steps are as follows:

[0024] (1) Anaerobic hydrolysis treatment of sewage by using anaerobic digestion reactor with biofilm zeolite material as filler

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

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

Embodiment 2

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

[0033] (1) Anaerobic hydrolysis treatment of sewage by using anaerobic digestion reactor with biofilm zeolite material as filler

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

[0035] Add zeolite to the sludge in the anaerobic section, the sludge concentra...

Embodiment 3

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

[0042] (1) Anaerobic hydrolysis treatment of sewage by using anaerobic digestion reactor with biofilm zeolite material as filler

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

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

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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 for low-carbon domestic sewage. Background technique [0002] Nitrogen and phosphorus are the main causes of eutrophication in rivers and lakes, and nitrogen and phosphorus mainly come from domestic sewage in cities and towns. In order to curb the eutrophication of surface water bodies, the country has set stricter standards for the discharge of nitrogen and phosphorus from sewage treatment plants. Therefore, higher nitrogen and phosphorus removal efficiency is required for sewage treatment. [0003] During the biological treatment process of sewage, sufficient carbon source is required for nitrogen and phosphorus removal. In the conventional sewage treatment process, C / N>5 can obtain a higher nitrogen and phosphorus removal effect and meet the discharge requirements. However, the C / N of general domestic sewage is usually around 3, and that of rur...

Claims

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Application Information

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Patent Type & Authority Applications(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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