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Method for treating sludge

A sludge treatment and sludge technology, applied in the fields of sludge treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., to achieve the effect of reducing operating energy consumption and shortening treatment

Inactive Publication Date: 2018-09-28
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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  • Claims
  • Application Information

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Problems solved by technology

On the other hand, the energy recovery and sludge reduction methods of anaerobic digestion, which seem to be more sustainable, have to face the problems of continuous stable treatment of ~70% organic matter and energy / resource utilization.

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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without cre...

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Abstract

The invention relates to a method for treating sludge. The method includes steps of S1, carrying out mechanical dewatering treatment on the sludge in a mechanical dewatering mode to form first-stage sludge in the shape of mud cake; S2, carrying out drying treatment on the first-stage sludge formed by means of dewatering treatment so as to further reduce the moisture content of the sludge and formsecond-stage sludge; S3, carrying out incineration treatment on the second-stage sludge which is already subjected to drying treatment. The moisture content of the sludge before dewatering treatment is carried out on the sludge is higher than or equal to 99%, and the moisture content of the first-stage sludge after dewatering treatment is carried out on the first-stage sludge is lower than or equal to 80%. The target moisture content of the second-stage sludge after drying treatment is carried out on the second-stage sludge ranges from 40% to 65%. The method for treating the sludge has the advantages of low cost, high efficiency, energy conservation and environmental protection.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge final treatment technology in which residual sludge is dried at low temperature in a sewage treatment plant, followed by incineration to increase production capacity and phosphorus recovery (phosphorus recovery). Background technique [0002] Urban sewage can achieve the removal of pollutants through a series of treatment processes, which can achieve the purpose of purification. However, the by-product produced during the treatment process—residual sludge is a microbial residue with a very high water content (≥99%). Therefore, it is bulky, and proper treatment and disposal need to consider cost and technical issues. At present, my country's sludge treatment and disposal mainly follow the "four modernizations" principles, that is, reduction→stabilization→harmless treatment→recycling. Among them, landfill and land use are the mainstream ways of sludge, and the application ...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/00F23G7/00
CPCC02F11/00C02F11/12C02F11/121C02F2303/06F23G7/001
Inventor 郝晓地李季陈奇曹达啟
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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