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Method for comprehensively treating grating garbage and activated sludge in sewage plant

A technology of activated sludge and comprehensive treatment, applied in dehydration/drying/thickened sludge treatment, sewage/sludge fertilizer, application, etc., to achieve the effects of reducing floor space, saving operating costs, and saving equipment costs

Inactive Publication Date: 2010-10-20
SHANGHAI MULIANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a comprehensive treatment method for grid waste and activated sludge in sewage plants, so as to solve many shortcomings in the existing separate treatment of grid waste and activated sludge in sewage plants

Method used

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  • Method for comprehensively treating grating garbage and activated sludge in sewage plant
  • Method for comprehensively treating grating garbage and activated sludge in sewage plant

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Embodiment Construction

[0018] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0019] Such as figure 1 As shown in the figure, a comprehensive treatment method for screen waste and activated sludge in a sewage plant is mainly to mix the pretreated screen waste with the activated sludge concentrated by one-step method, and then chemically catalyze it together with the sorted organic domestic waste. After hydrolysis and solid ammonia treatment, the organic energy fertilizer is prepared by using the prior art. After the grid waste is intercepted by the grid, it is pre-treated. Firstly, the large-sized waste is crushed into small-sized 1-5mm waste by the primary crusher, and then enters the high-speed rotary cutter fine crusher for further primary crushing. The final garbage is finely crushed into a slurry of less than 1mm, and then s...

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Abstract

The invention provides a method for comprehensively treating grating garbage and activated sludge in a sewage plant. The pretreated grating garbage and concentrated activated sludge are mixed and the mixture and sorted organic domestic garbage are subjected to chemical catalytic hydrolysis and ammonia-fixing treatment to form an organic energy fertilizer by the prior art. The method has the advantages that: 1, the grating garbage does not need conveying outside through payment to be treated, so that the processing fee of the grating garbage is saved; 2, the activated sludge is treated by waste acid and subjected to gravity concentration, and two-step concentration (gravity settling and flocculation concentration by adding polyacrylamide) in the prior art is changed into one-step concentration, so that the equipment and material cost is saved, and the process is simple and quick and has significance for environmental protection by using the waste acid; and 3, the concentrated activatedsludge and the pretreated grating garbage are directly mixed and subjected to chemical catalytic hydrolysis, so that the dehydration process is saved, the repeated process is avoided, the floor area is reduced and the equipment investment is saved.

Description

technical field [0001] The invention relates to a method for comprehensively treating grid garbage and activated sludge in a sewage plant. Background technique [0002] The process of urban sewage treatment is generally grid-grit chamber-primary sedimentation tank-biological treatment process-secondary sedimentation tank-disinfection-discharge or tertiary treatment. In the process of sewage treatment, solid, semi-solid and liquid waste, also called sludge, will be produced, which contains a large amount of organic matter and can be used as agricultural fertilizer, but also contains a large number of bacteria, viruses and heavy metals, etc. Quantity, stability, and harmless treatment. [0003] With the popularization of sewage treatment facilities, the improvement of treatment rate and the deepening of treatment degree, the amount of sludge produced in sewage plants will increase greatly. If it is discharged without treatment, it will cause serious secondary pollution to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F15/00C05F7/00C05F9/00C02F11/12
CPCY02A40/20
Inventor 刘勇宋荟刘文治
Owner SHANGHAI MULIANG IND CO LTD
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