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Filtering material made from waste mud and its prodn. method

A sludge and filter material technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve problems such as sludge not being effectively utilized

Inactive Publication Date: 2006-06-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 that can not only effectively utilize all sludge, but also make the product have excellent performance and have the characteristics of promoting microbial activity and its preparation method

Method used

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  • Filtering material made from waste mud and its prodn. method
  • Filtering material made from waste mud and its prodn. method
  • Filtering material made from waste mud and its prodn. method

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specific Embodiment approach 1

[0007] Specific embodiment 1: The filter material of this embodiment is prepared from the raw materials of the following components: sludge, clay, binder, and the addition amount of each raw material is respectively: clay accounts for 80~150% of the dry sludge mass %, the binder accounts for 5-30% of the dry sludge mass; its preparation method is that after mixing the raw materials according to the stated ratio, the temperature is raised to 700-1100° C., and then fired for 10-30 minutes.

specific Embodiment approach 2

[0008] Specific embodiment two: the addition amount of each raw material in this embodiment is respectively: clay accounts for 100% of dry sludge quality, binder accounts for 10% of dry sludge quality; Fired at 900°C for 25 minutes.

specific Embodiment approach 3

[0009] Specific embodiment three: the addition amount of each raw material in this embodiment is respectively: clay accounts for 130% of dry sludge quality, binder accounts for 25% of dry sludge quality; Fired at 1100°C for 20 minutes.

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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 80-150% and 5-30%. Its preparing process includes proportionally mixing all raw materials and sintering at 700-1100 deg.C for 10-30 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 Applications(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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