Method for circulating and reutilizing sludge during process of sewage

A sludge recycling and sewage treatment technology, applied in the field of waste pollutant treatment, can solve the problems of secondary pollution, high infrastructure investment and high operating costs

Inactive Publication Date: 2007-11-21
上海荣禄投资管理有限公司 +1
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  • Abstract
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  • Claims
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Problems solved by technology

However, the infrastructure investment and operating costs required for sludge incineration are rel

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  • Method for circulating and reutilizing sludge during process of sewage

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Embodiment Construction

[0049] The invention provides a sludge recycling method in the process of sewage treatment. The method uses the combination of three technologies: EC (electric flocculation machine), EM (beneficial microorganism engineering bacteria), and EW (earthworm).

[0050] The specific steps of the method of the present invention, please refer to Fig. 1, after the sludge of the sewage treatment plant is treated by EC (electric flocculation machine), remove the heavy metal, pesticide and antibiotic residue in the sludge, then enter the sludge dewatering machine for dehydration, and dehydrate The final sludge is sent to the air-drying field for air-drying, and additives (pig manure, bean dregs, etc.) are added to adjust the ratio of N, P, and K in the sludge, and the air-drying sludge is sent to the composting room for composting, and air is sent to the composting room , Sprinkle water and stir regularly, add EM (engineering bacteria), after a period of fermentation, send the composted com...

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Abstract

Treatment of refused pollutant is carried out by EC treating for sludge in sewage treatment plant, removing heavy metal, pesticides and antibiotics residues, entering into sludge dewatering apparatus to dewater, delivering dewatered sludge to air-drying farm to air dry, adding into additives to adjust N, P and K proportion in sludge, entering dried sludge into composting chamber to compost, transferring air to composing chamber, spraying water while timing agitating, adding into EM, fermenting, delivering manure mixture to livestock farm and feeding by earthworm. Earthworm's excrement can be used as biological organic fertilizer. It's cheap and economical.

Description

technical field [0001] The invention belongs to the technical field of waste pollutant treatment, and in particular relates to a sludge recycling method in the sewage treatment process. Background technique [0002] The generation of sludge is inevitable in the process of human activities. The arbitrary stacking and discarding of a large amount of sludge produced by sewage treatment has caused new pollution to the environment. How to properly dispose of this sludge has become a topic of common concern worldwide. [0003] Sludge is the solid sedimentation material produced by water and wastewater treatment processes. Generally refers to municipal drainage sludge. The output of sludge accounts for about 0.3% to 0.5% of the total amount of sewage treatment (calculated with a water content of 97%). In addition to nitrogen, phosphorus and other nutrients needed for crop growth, sludge can improve In addition to the organic matter in the soil structure, it also contains potentia...

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Application Information

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IPC IPC(8): C02F11/00C02F11/12C05F7/00C05F17/00A01K67/033C12N1/14C12N1/16C12N1/20
CPCY02A40/20Y02W30/40
Inventor 李春铜
Owner 上海荣禄投资管理有限公司
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