Filtering material used for water-treatment made from waste mud and its prodn. method

A filter material and water treatment technology, applied in the direction of filtration separation, separation methods, chemical instruments and methods, etc., can solve the problem that sludge is not effectively used

Inactive Publication Date: 2007-10-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem that the existing sludge has not been effectively utilized, the present invention provides a filter material which can not only effectively utilize the sludge, but also make the product have excellent performance and have the characteristic of promoting microbial activity and its preparation method

Method used

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  • Filtering material used for water-treatment made from waste mud and its prodn. method

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specific Embodiment approach 1

[0012] Specific embodiment one: this embodiment is the water treatment filter material that is made by sludge, and it is prepared from the raw material of following composition: sludge, clay, binding agent, the addition amount of described each raw material is respectively: The clay accounts for 300-400% of the dry sludge mass, and the binder accounts for 10-20% of the clay mass; its preparation method is that after mixing the raw materials according to the stated ratio, firing at 900-1200°C for 15 ~35 minutes, the binder in this embodiment is water glass.

specific Embodiment approach 2

[0013] Specific embodiment two: the addition amount of each raw material in this embodiment is respectively: clay accounts for 320% of dry sludge mass, binder accounts for 12% of clay mass; Fired for 30 minutes under the same conditions.

specific Embodiment approach 3

[0014] Specific embodiment three: the addition amount of each raw material in this embodiment is respectively: clay accounts for 380% of dry sludge mass, binder accounts for 18% of clay mass; Fired for 20 minutes under the same conditions.

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Abstract

A filtering material prepared from sludge for treating water features that the mass ratio of the clay and adhesive to sludge is respectively 300-400% and 10-20%. Its preparing process includes proportionally mixing all raw materials and sintering at 900-1200 deg.C for 15-35 min.

Description

technical field [0001] The invention relates to a filter material used in a water treatment process and a preparation method thereof. Background technique [0002] The biological aerated filter is used in wastewater treatment, and the choice of granular filter media plays a very important role in obtaining higher active biomass and biodiversity. At present, the commonly used filter materials are quartz sand, activated carbon, zeolite, ceramsite and plastic products (synthetic fibers, polyethylene balls, corrugated plates, etc.). The general requirements for the filter material of the biological aerated filter are: (1) The surface is rough. The filter material with a rough surface provides an ideal growth and breeding ground for microorganisms, which is easy to touch and has high biomass. (2) The density is moderate. If the density is too large, it is not conducive to the backwashing, which means that the required recoil intensity is large and the time required for recoil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/06
Inventor 许国仁李圭白邹金龙
Owner HARBIN INST OF TECH
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