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Domestic sewage treatment method

A technology for domestic sewage and treatment methods, applied in biological water/sewage treatment, water/sewage treatment, light water/sewage treatment, etc., can solve problems such as low efficiency, inability to meet urban sewage discharge, and sewage containing a large amount of nitrogen and phosphorus substances , to achieve the effect of cost reduction, low cost and no secondary pollution

Inactive Publication Date: 2016-02-24
WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have the problems of low efficiency in treatment and the treated sewage contains a large amount of nitrogen and phosphorus substances, which cannot meet the needs of urban sewage discharge.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Pretreatment: Pass domestic sewage into the grille and grit chamber for initial sedimentation treatment;

[0026] (2) Primary treatment: pass the pretreated sewage into the primary aeration tank filled with modified sludge, and use the microorganisms in the modified sludge to degrade the sewage;

[0027] The domestic sewage after passing through the grid and the grit chamber is passed into the first-stage aeration tank filled with modified sludge, which is added with lactic acid bacteria, yeast and natto bacteria produced from food fermentation. Obtained from the sludge, the microorganisms in the modified sludge are placed in the primary aeration tank for training and multiplication, and the sludge is reflowed and the remaining sludge is recovered at the same time. The added lactic acid bacteria, yeast and The volume ratio of the total volume of natto bacteria to domestic sewage is 1.8‰, and the treatment time is 12 hours.

[0028] (3) Photocatalytic oxidation trea...

Embodiment 2

[0037] (1) Pretreatment: Pass domestic sewage into the grille and grit chamber for initial sedimentation treatment;

[0038] (2) Primary treatment: pass the pretreated sewage into the primary aeration tank filled with modified sludge, and use the microorganisms in the modified sludge to degrade the sewage;

[0039] The domestic sewage after passing through the grid and the grit chamber is passed into the first-stage aeration tank filled with modified sludge, which is added with lactic acid bacteria, yeast and natto bacteria produced from food fermentation. Obtained from the sludge, the microorganisms in the modified sludge are placed in the primary aeration tank for training and multiplication, and the sludge is reflowed and the remaining sludge is recovered at the same time. The added lactic acid bacteria, yeast and The volume ratio of the total volume of natto bacteria to domestic sewage is 0.8‰, and the treatment time is 18 hours.

[0040] (3) Photocatalytic oxidation trea...

Embodiment 3

[0049] (1) Pretreatment: Pass domestic sewage into the grille and grit chamber for initial sedimentation treatment;

[0050] (2) Primary treatment: pass the pretreated sewage into the primary aeration tank filled with modified sludge, and use the microorganisms in the modified sludge to degrade the sewage;

[0051] The domestic sewage after passing through the grid and the grit chamber is passed into the first-stage aeration tank filled with modified sludge, which is added with lactic acid bacteria, yeast and natto bacteria produced from food fermentation. Obtained from the sludge, the microorganisms in the modified sludge are placed in the primary aeration tank for training and multiplication, and the sludge is reflowed and the remaining sludge is recovered at the same time. The added lactic acid bacteria, yeast and The volume ratio of the total volume of natto bacteria to domestic sewage is 1.5‰, and the treatment time is 15 hours.

[0052] (3) Photocatalytic oxidation trea...

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PUM

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Abstract

The invention provides a domestic sewage treatment method. The treatment method comprises the steps of pretreatment, primary treatment, photocatalysis oxidation treatment, secondary treatment, post-treatment, and precipitation and water discharge. The method adopting a photocatalysis technology to degrade organic matters and inorganic matters in sewage has the advantages of high efficiency, low cost, energy saving, no secondary pollution, and simple post-treatment of treated sewage; and the integral effects of cheap food fermentation microbes and microbes in sludge are adopted, so the quality of domestic sewage is improved, and treatment demands of high efficiency and low cost of the domestic sewage are met.

Description

technical field [0001] The invention relates to the field of domestic sewage treatment, in particular to a treatment method for domestic sewage. Background technique [0002] Domestic sewage is mainly sewage generated in the process of human life, and it is one of the main sources of pollution of water bodies. Mainly feces and washing sewage. The amount of domestic sewage discharged by each person in the city is 150-400L per day, which is closely related to the living standard. Domestic sewage contains a large amount of organic matter, such as cellulose, starch, sugar and fatty protein; it also often contains pathogenic bacteria, viruses and parasite eggs; inorganic salts such as chloride, sulfate, phosphate, bicarbonate and sodium, Potassium, calcium, magnesium, etc. The general feature is high nitrogen, sulfur and phosphorus content, and under the action of anaerobic bacteria, it is easy to generate odorous substances. [0003] At present, there are many domestic sewag...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/32C02F1/70C02F1/725C02F3/12C02F3/121C02F3/1257C02F3/341C02F2101/105C02F2101/30C02F2301/08
Inventor 徐德生
Owner WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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