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Municipal sewage treatment plant sludge resource utilization method

A technology of urban sewage and treatment plants, applied in the direction of dehydration/drying/concentrated sludge treatment, application, household appliances, etc., to achieve the effects of reducing production costs, reducing fresh water consumption, and improving aging effects

Pending Publication Date: 2021-10-15
HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to provide a method for resource utilization of sludge in urban sewage treatment plants to solve the existing sludge treatment and disposal problems and realize economical, environmental protection treatment and resource utilization of sludge

Method used

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  • Municipal sewage treatment plant sludge resource utilization method

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0032] like figure 1 As shown, a method for resource utilization of urban sewage treatment plant sludge comprises the following steps:

[0033] S1. Gravity concentration is performed on the sludge of urban sewage treatment plants twice to obtain supernatant liquid and concentrated sludge in the lower layer. The supernatant liquid is stored in the clear liquid tank, and the concentrated sludge is stored in the sludge tank;

[0034] Specifically, the sludge from the sewage treatment plant is treated with a first-level gravity concentration tank. The sludge from the urban sewage treatment plant is the sludge from the sludge concentration tank. The moisture content of the sludge is 97%. The sludge is layered in the tank, and the upper layer It is clear liquid, and the lower layer is primary thickened sludge with a water content of 92%, and the primary conce...

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Abstract

The invention discloses a municipal sewage treatment plant sludge resource utilization method which comprises the following steps: S1, carrying out two-time gravity concentration on municipal sewage treatment plant sludge to obtain a supernatant liquid and a lower layer concentrated sludge, storing the supernatant liquid in a supernatant liquid tank, and storing the concentrated sludge in a sludge tank; s2, adding sodium lignin sulfonate and fatty alcohol-polyoxyethylene ether into the sludge tank, and uniformly mixing to obtain a liquid sludge raw material; s3, mixing coal gangue and shale according to a certain proportion, crushing, and screening to obtain a brick making raw material; s4, adding the liquid sludge raw material into the brick making raw material, mixing to obtain pug, and feeding the pug into an aging warehouse for aging to obtain an aged material; s5, adding water into the aged material, mixing, stirring, and extruding into blank strips through a vacuum brick extruding machine; and S6, cutting the blank strips into green bricks, drying, sintering and making the bricks. According to the method, the clear liquid and the concentrated sludge obtained from the sludge of the municipal sewage treatment plant can be fully utilized, and economic and environment-friendly treatment and resource utilization of the sludge are realized.

Description

technical field [0001] The invention relates to the technical field of sludge resource utilization, in particular to a brick-making method for sludge resource utilization in urban sewage treatment plants. Background technique [0002] With the acceleration of urbanization in our country, the continuous expansion of urban scale and the rapid increase of urban population, the discharge of sludge generated by industry and daily life has increased rapidly, and the pressure on sludge treatment is increasing. The environmental protection treatment and resource utilization of sludge has become a hot spot. Currently, sludge treatment methods include sludge thickening, sludge conditioning, and sludge dehydration. Among them, sludge concentration generally refers to the gravity concentration of sludge under the action of gravity, usually the sludge moisture content can be concentrated from 99.7-99.9% to 95-99.5%; sludge conditioning generally refers to the sludge with a moisture cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C02F11/12
CPCC04B33/1321C04B33/1324C02F11/12C04B2235/656C04B2235/6567Y02P40/60
Inventor 王俊田振邦赵亮黄做华李宾宾赵可江崔俊峰陈继红许欣欣黄伟庆李箐湲段文杰寇丽栋王静贾俊俊李龙
Owner HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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