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Sludge concentration method and filtering separation device thereof

A technology of filtration separation and sludge concentration, applied in the direction of filtration separation, separation method, filtration loop, etc., can solve the problems of high moisture content of concentrated sludge, power consumption, investment and operating costs, and achieve small footprint, high operation The effect of low cost and investment cost reduction

Inactive Publication Date: 2009-12-16
NINGBO QINGSHUIYUAN WATER TECH
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Problems solved by technology

The water quality of the membrane effluent of this invention reaches the standard of reclaimed water, and can be reused in fields such as greening and road flushing, but the moisture content of the concentrated sludge of this invention is relatively high (97-98%), and the membrane operation process requires power consumption, investment and operation. higher cost

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  • Sludge concentration method and filtering separation device thereof
  • Sludge concentration method and filtering separation device thereof
  • Sludge concentration method and filtering separation device thereof

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Embodiment Construction

[0031] Specific embodiments of the present invention will be described in detail below in conjunction with the above-mentioned drawings.

[0032] A sludge thickening method, the method combines figure 2 Include the following steps:

[0033] ① Filtration and separation: on the filtration and separation device, a tubular filter element made of filter element material is used to filter and separate gravity sedimentation sludge into concentrated sludge, and the filtered clear liquid is discharged for treatment;

[0034] ②Filter press treatment: The concentrated sludge separated by filtration is dehydrated by filter press on a filter press to form a mud cake for export.

[0035] In the sludge thickening process, in order to ensure the recovery of the filtering function of the tubular filter element made of ceramic or PP filter element material, the tubular filter element in the filtration separation device must be backwashed regularly. The air inlet and water inlet enter the tub...

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Abstract

The invention provides a sludge concentration method and a filtering separation device thereof. The concentration method comprises the following steps of: performing filtering separation on primary sedimentation sludge or remained active sludge in a secondary sedimentation tank or mixed sludge of the primary sedimentation sludge and the remained active sludge in the filtering separation device and by tubular filter cores to obtain concentrated sludge, and discharging the filtered clear solution; putting the concentrated sludge on a filter press for press filter dewatering; and obtaining a sludge cake and transferring the sludge cake. The filtering separation device comprises a cylinder, tubular filter cores vertically distributed in the cylinder, a fixing plate, a water collection tank, a sludge inlet arranged on the cylinder, a sludge collection zone, a sludge discharge channel provided with a valve and the like. The sludge concentration method and the filtering separation device have the advantages of low water content in the concentrated sludge, short concentration time, small floor areas, small device volume, low investment cost, low operating cost and long service life of the filter cores due to the use of back wash filter cores.

Description

technical field [0001] The invention relates to a sludge concentration method and device in the sewage treatment process, in particular to a sludge concentration method and a filtration and separation device generated in the sewage treatment. Background technique [0002] The sludge in the currently known sewage treatment process mainly includes the primary sludge in the primary sedimentation tank and the remaining activated sludge in the secondary sedimentation tank or the mixed sludge of the two. The concentration and dehydration include: gravity concentration, air flotation concentration and mechanical concentration etc. Among them, gravity concentration is the most commonly used sludge concentration method at present. It is essentially a sedimentation process. The residence time of sludge in the tank is generally more than 12 hours. Although its process technology, structure and operation management are simple, it occupies a large area and Poor sanitary conditions; air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D36/00B01D29/33B01D29/52C02F11/12
Inventor 周宇松逯庆国吴敏郭红燕谭锁奎
Owner NINGBO QINGSHUIYUAN WATER TECH
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