Method for preparing active filtering absorbent material and method for intensify water treatment thereby

An adsorption material and water treatment technology, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, sludge treatment, etc., can solve the problems of limited sewage interception capacity, small specific surface area, and low surface adsorption capacity

Inactive Publication Date: 2005-06-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently widely used filter materials such as quartz sand have problems such as small specific surface area, low porosity, and low surface adsorption capacity.
At the same time, because the surface of the quartz sand filter material is negatively charged,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0004] Specific embodiment one: the active filter adsorption material of the present embodiment is obtained like this: a, the solid-liquid separation thing that the domestic sewage forms after biochemical treatment carries out mud-water separation through sedimentation; b dewaters the sludge obtained in the sedimentation tank, Add additives accounting for 0.1-40% of the total mass, and dry at 100-130°C; c. According to the different quality of polluted water used in materials, gradually increase the temperature to 400-1200°C at a speed of 1-20°C / min, and under this condition Keep it warm for 30-180 minutes, and then crush it into particles of 0.1-5 mm to obtain an active filter adsorption material. The additive is one or a mixture of kaolin, water glass and polyamine resin.

specific Embodiment approach 2

[0005] Specific embodiment two: this embodiment utilizes this active filter adsorption material to carry out strengthened water treatment like this: (one) raw water enters in the mixing pool, in mixing tank, adds chemical agent, (two) after raw water and chemical agent are mixed React through the reaction tank, and then pass the sediment produced in the reaction tank through the sedimentation tank for mud-water separation; (3) The effluent from the sedimentation tank is filtered and sterilized through the filter tank and the disinfection tank in turn to obtain qualified effluent. The core part of the method is the The filter material in the filter pool is an active filter adsorption material. The dosage of the chemical agent is 1-100 mg / L (calculated as metal salt). The chemical agent is iron salt or aluminum salt, such as FeCl 3 , Fe 2 (SO4) 3 , polyferric sulfate, AlCl 3 、Al 2 (SO4) 3 , polyaluminum chloride, etc.

specific Embodiment approach 3

[0006] Embodiment 3: This embodiment is different from Embodiment 2 in that 0-5 mg / L oxidant is added before the chemical agent is added. Other processes are the same as in the second embodiment. The oxidizing agent is one or a mixture of ozone, ferrate, permanganate, chlorine and chlorine dioxide.

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PUM

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Abstract

The way to produce active attaching dose and the way of handling by strong water, concerns the way of produce active attaching dose using mire in the mire handling craft and the technique of strengthen water handling using the active attaching dose. The way to get the active attaching dose: handling the living dirty water to the solid-liquid separating thing, and filter them to separate the mire and water; heat the mire after filtered, crash them to grains; dip the grains into the acid, finish activating by mixing; heat, crash, then the active attaching dose is made. The way to strengthen the water by active attaching dose is: put the original water into the mixing pond, reaction pond, filtering pond, disinfecting pond, adding chemical dose into the mixing pond, adding mud attaching dose into the reaction pond. The mud attaching dose hydrochloric acid' fusing rate can attain round to 0.25%, NaOH's fusing rate is around 1.05%, after filtered the mud missing rate increase 10%--50%, organic pollution matter missing rate increase 10%--40%.

Description

Technical field: [0001] The invention relates to a method for preparing an active filter adsorption material from sludge produced in a sewage biochemical treatment process and a technology for enhancing water treatment by using the active filter adsorption material. Background technique: [0002] At present, the treatment process commonly used in urban water treatment in my country is: coagulation→sedimentation→filtration→disinfection multi-level barrier process flow, among which coagulation and filtration are the key links to ensure water quality. Studies have shown that in the filtration process, the increase of organic matter in the water causes the filter material in the filter to be polluted by organic matter, and loses the adsorption and retention of colloidal impurities, resulting in the greatly weakened role of filtration as a key barrier in the process, making turbidity In the process of filtration, the organic matters are not effectively intercepted, and more disin...

Claims

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Application Information

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IPC IPC(8): B01J20/00C02F1/28C02F11/00
Inventor 许国仁
Owner HARBIN INST OF TECH
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