Microwave and PAM (Polyacrylamide) flocculating agent combined sludge dewatering method

A technology of sludge dehydration and flocculant, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., which can solve the problems of increased sludge treatment cost and large amount of flocculant dosage, so as to reduce the cost of subsequent treatment and reduce the moisture content , easy-to-achieve effects

Inactive Publication Date: 2012-09-12
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the technical problem that the amount of flocculant added in the existing sludge dewatering method is relatively l...

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0015] Specific implementation mode 1: The sludge dehydration method combined with microwave and PAM flocculant in this implementation mode is as follows:

[0016] 1. Microwave the sludge passing through the sludge thickening tank for 50s at a frequency of 2450MHZ and a power of 700w;

[0017] 2. Add PAM flocculant to the sludge treated in step 1, the dosing ratio is 100mL sludge and 4mL PAM flocculant, the concentration of PAM flocculant is 1g / L;

[0018] 3. Centrifuge or dewater the sludge treated in step 2 to complete the sludge dehydration.

[0019] Use the following tests to determine the combination sequence of microwave and PAM flocculant and determine the optimal coagulant dosage and microwave loading time:

[0020] 1. Determine the combination sequence of microwave and PAM flocculant:

[0021] Take ten 500mL beakers, divide them into two groups of five and number them, and add 200mL of concentrated sludge to each beaker.

[0022] The first group: After five sludge ...

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Abstract

A microwave and PAM (Polyacrylamide) flocculating agent combined sludge dewatering method relates to a sludge dewatering method. The microwave and PAM (Polyacrylamide) flocculating agent combined sludge dewatering method aims at solving the technical problem that according to the traditional sludge dewatering method, as the addition quantity of a flocculating agent is large, the cost of sludge treatment is increased. The microwave and PAM (Polyacrylamide) flocculating agent combined sludge dewatering method comprises the following steps: carrying out microwave radiation on sludge passing through a sludge concentration tank for 50s under the conditions of 2450MHZ frequency and 700w power, then adding a PAM flocculating agent, wherein the addition proportion is that 4mL of the PAM flocculating agent is added in 100mL of sludge, the concentration of the PAM flocculating agent is 1g/L, and carrying out centrifugal or filter-press dewatering, thereby finishing the sludge dewatering. According to the microwave and PAM flocculating agent combined sludge dewatering method, sludge particles are accelerated to move and mutually collide under the effect of the microwave radiation on sludge floc so that the sludge floc is damaged and part bound water and interstitial water in the sludge floc are released, then the sludge particles can rapidly become unstable and flocculate by using the PAM flocculating agent for conditioning, thereby leading the effect of sludge dewatering to be better, and simultaneously reducing the addition quantity of the flocculating agent.

Description

technical field [0001] The invention relates to a sludge dewatering method. Background technique [0002] In the process of urban sewage treatment, the output of sludge accounts for about 0.3% to 0.5% of the total treated water. With the continuous increase of sewage treatment rate, the surplus sludge production is also increasing rapidly. Since improper sludge treatment will cause serious secondary pollution, the treatment and disposal of excess sludge has become the focus of environmental protection departments in various countries. Among them, the high moisture content of sludge is the biggest obstacle affecting sludge treatment. How to efficiently remove the water in sludge is the focus of all walks of life. [0003] At present, the most typical excess sludge dewatering technology is to add organic polymer flocculant to the excess sludge after precipitation and concentration to make the sludge particles coagulate and destabilize, and then dehydrate and concentrate the ...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/14
Inventor 韩洪军牟晋铭
Owner HARBIN INST OF TECH
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