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A kind of active sludge deep dewatering material and its application

An activated sludge and deep dewatering technology, applied in water/sludge/sewage treatment, sludge treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problem of high operating cost, long cycle span, and no industrial promotion. application and other issues, to achieve the effect of improving dehydration performance and broad application potential

Active Publication Date: 2021-03-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current sludge cell wall breaking methods can be divided into physical methods, chemical methods and biological methods. Typical physical methods include ultrasonic treatment, mechanical grinding and high-temperature heating treatment, etc. The main disadvantages are high energy consumption and ineffective dehydration synergies; Typical chemical methods include ozone oxidation, acid-base treatment, and Fenton’s reagent method, etc., which are characterized by obvious wall-breaking effects, but the chemicals corrode the equipment severely, and the operating cost is high; the biological method uses biological enzymes to degrade sludge cells, and its main disadvantages are: is the cycle span long
Because these methods all have different degrees of defects, they have not achieved large-scale industrial promotion and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Weigh 100ml of activated sludge from a sewage treatment plant, with a water content of about 95%, and add it to a beaker with a capacity of 250ml;

[0024] 2) Weigh 100 mg of single-walled carbon nanotubes and 3 mg of polyvinylpyrrolidone into a beaker with a capacity of 50 ml, and add 50 ml of distilled water to the beaker;

[0025] 3) Place the beaker containing the carbon nanotubes in an ultrasonic cleaner, and ultrasonicate at room temperature for 60 minutes;

[0026] 4) Pour the sonicated carbon nanotube solution into the activated sludge, and stir evenly;

[0027] 5) Place the beaker containing the sludge on a metal heating plate, and the temperature of the heating plate is controlled at 40°C;

[0028] 6) The activated sludge in the beaker was continuously stirred for 120min by using a stirrer, and the stirring shaft rotating speed was 250rpm;

[0029] 7) After the stirring is completed, the specific resistance of the sludge treated with single-walled carbon ...

Embodiment 2

[0033] 1) Weigh 100ml of activated sludge from a sewage treatment plant, with a water content of about 95%, and add it to a beaker with a capacity of 250ml;

[0034] 2) Weigh 500 mg of single-walled carbon nanotubes and 15 mg of polyvinylpyrrolidone into a beaker with a capacity of 50 ml, and add 50 ml of distilled water to the beaker;

[0035] 3) Place the beaker containing the carbon nanotubes in an ultrasonic cleaner, and ultrasonicate at room temperature for 60 minutes;

[0036] 4) Pour the sonicated carbon nanotube solution into the activated sludge, and stir evenly;

[0037] 5) Place the beaker containing the sludge on a metal heating plate, and the temperature of the heating plate is controlled at 40°C;

[0038] 6) The activated sludge in the beaker was continuously stirred for 120min by using a stirrer, and the stirring shaft rotating speed was 250rpm;

[0039] 7) After the stirring is completed, the specific resistance of the sludge treated with single-walled carbon...

Embodiment 3

[0043] 1) Weigh 100ml of activated sludge from a sewage treatment plant, with a water content of about 95%, and add it to a beaker with a capacity of 250ml;

[0044] 2) Weigh 100 mg of single-walled carbon nanotubes and 3 mg of polyvinylpyrrolidone into a beaker with a capacity of 50 ml, and add 50 ml of distilled water to the beaker;

[0045] 3) Place the beaker containing the carbon nanotubes in an ultrasonic cleaner, and ultrasonicate at room temperature for 60 minutes;

[0046] 4) Pour the sonicated carbon nanotube solution into the activated sludge, and stir evenly;

[0047] 5) Place the beaker containing the sludge on a metal heating plate, and the temperature of the heating plate is controlled at 80°C;

[0048] 6) The activated sludge in the beaker was continuously stirred for 120min by using a stirrer, and the stirring shaft rotating speed was 250rpm;

[0049] 7) After the stirring is completed, the specific resistance of the sludge treated with single-walled carbon ...

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Abstract

The invention relates to a deep dehydration material for activated sludge and application of the deep dehydration material. The deep dehydration material for the activated sludge is a nanotube with a pipe diameter of 50nm and a length-diameter ratio of (50-1000) to 1. The application of the deep dehydration material comprises the steps of adding the nanotube material into the activated sludge, culturing the sludge at 30-100 DEG C for 60-180 minutes, and mechanically stirring the activated sludge to deconstruct and crush cells of the activated sludge under the action of the nanotube so as to release bound water in the cells, so that the dehydration performance of the sludge is substantially improved. The deep dehydration material has the beneficial effects that the process is simple, the reaction temperature is low, the operation cost is low, the energy consumption is low, and equipment corrosivity is avoided.

Description

technical field [0001] The invention belongs to the field of dewatering materials and applications, in particular to an activated sludge deep dehydration material and applications thereof. Background technique [0002] With the continuous advancement of the pace of urbanization in my country and the increasingly stringent requirements for sewage treatment, the number and scale of urban sewage treatment plants have increased rapidly. The "2015 Urban and Rural Construction Statistical Bulletin" issued by the Ministry of Housing and Urban-Rural Development pointed out that compared with 2010, the number of sewage treatment plants in cities and towns across the country increased by 41.9% in 2015, and the daily treatment capacity of sewage plants increased by 36.5%. Up to 170 million cubic meters per day. Based on 6.75 tons of wet sludge produced per 10,000 tons of sewage (moisture content 80%), the annual wet sludge production in 2015 exceeded 40 million tons. In the next few ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/143C02F11/122
CPCC02F11/12C02F11/122C02F2303/06
Inventor 邓文义苏亚欣贺振江
Owner DONGHUA UNIV
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