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Sludge dewatering method

A sludge dewatering and sludge technology, applied in sewage/sludge fertilizer, dewatering/drying/concentrating sludge treatment, application, etc., can solve the problems of reducing sludge moisture content, poor dewatering performance, etc. The effect of pollution, good hardness and easy subsequent use

Active Publication Date: 2010-04-07
厦门市政环境科技股份有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor dehydration performance in direct sludge dehydration by mechanical dehydrators, to provide a method that can significantly reduce the moisture content of sludge, reduce the volume of sludge, and solve the difficulties of sludge transportation and storage. It is a sludge dehydration method that reduces the cost of sludge treatment, prepares for the subsequent treatment of sludge, and lays the foundation for the final disposal and utilization of sludge.

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  • Sludge dewatering method

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Embodiment Construction

[0026] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.

[0027]1. Conditioning: The concentrated sludge (with a moisture content of about 96%) is sent to the sludge storage tank in the dewatering machine room by gravity or sludge pumping for sludge conditioning test. The test process is mainly divided into comprehensive test stage and orthogonal test Stage: First use the beaker experiment to test several coagulants according to the same dosage, observe the situation of the flocs, and screen out the best agents, and then use the gravity filtration test to verify the effects of these agents. Judging the turbidity of the filtrate and evaluating the volume of the filtrate to evaluate the conditioning effect of the agent, the ideal conditioner should make the filtrate clear, with a large amount of filtrate and low turbidity. Therefore, in the gravity filtration test, the filtrate turbidity and the volume of the ...

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Abstract

The invention discloses a sludge dewatering method and relates to a sludge treatment method. The invention provides the sludge dewatering method which can significantly reduce the water content in sludge, reduce the volume of the sludge, solve the difficulties in sludge transport and storage, reduce the sludge treatment fee, complete the advance-phase preparation for the follow-up treatment of the sludge and lay a foundation for the final disposal and the utilization of the sludge. The sludge dewatering method comprises the steps of first-stage liquid gravity concentration of the sludge, conditioning and plate-and-frame mechanical dewatering.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a sludge dehydration method. Background technique [0002] The sludge in existing urban sewage treatment plants has high moisture content, small and uneven particles, and large specific resistance. Although sludge dewatering facilities are generally equipped, mechanical dehydrators directly dehydrate sludge, and their dehydration performance is poor. Its handling and disposal poses many problems. Moreover, the key technology and research on sludge dewatering started relatively late, and most of the research results remain at the laboratory level, and the ability to combine with industrialization is relatively lacking. Lu Bin et al. ([1] Lu Bin, Wang Hongyu, Yang Xiaojun. Research progress on sludge dewatering performance conditioning technology [J]. Shanxi Architecture, 2009, 35(9): 180-182) used microwave technology for pretreatment of dewatered sludge , significantly reduce the wa...

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Application Information

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IPC IPC(8): C02F11/14C05F7/00
CPCY02A40/20
Inventor 谢小青谢小明黄珍艺张荣海林清秀卢光辉吴伟陈重安王鲁闽戴兰华
Owner 厦门市政环境科技股份有限公司
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