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Wall breaking and deep dewatering treatment method for remaining active sludge

A treatment method and residual activity technology, applied in water/sludge/sewage treatment, sludge treatment, dehydration/drying/thickened sludge treatment, etc., can solve problems such as unfavorable transportation, large cement consumption, and obstacles to resource utilization , to achieve the effect of improving the efficiency of wall breaking, reducing the amount of sludge and remarkable dehydration effect

Active Publication Date: 2019-06-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as a large amount of cement, unfavorable transportation after curing, and obstacles to resource utilization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]The specific embodiment of the present invention is described by taking the sludge in the excess sludge thickening tank of a certain sewage treatment plant as an example. Add 0.04% triclocarban of TS sludge (TS is the total solid content of sludge) and 0.25% nonylphenol polyoxyethylene ether of TS sludge and 0.1 % TS sludge aluminum chloride and 0.15% TS sludge imipenem, stirring reaction for 40min, add 2% sludge volume 10mM EDTA and 5% sludge volume 36% sucrose to the treated sludge solution, stir for 20 minutes, quickly add ice water 3 times the volume of sludge, after 30 minutes of equilibrium time, pass it into the feeding tank at the front of the magnetic separator and add additives 0.2% polyaluminum chloride solution and 0.002% polypropylene Amide solution, and 0.5% hydrogen peroxide of TS sludge was added, stirred for 30 minutes and then fed, and 2wt% magnetic powder solution with a concentration of 10% was fed at the same time, and the residence time of the magne...

Embodiment 2

[0027] With the surplus sludge raw material of embodiment 1, the selected treatment process is the same as embodiment 1. Add 0.1% TS sludge triclocarban and 0.8% TS sludge nonylphenol polyoxyethylene ether and 0.5% TS sludge aluminum chloride and Meropenem in 0.5% TS sludge, stirred for 40 minutes, added 5% sludge volume of 20mM EDTA and 5% sludge volume of 36% sucrose solution to the treated sludge, stirred for 20min, and quickly added 3 times the sludge volume Ice water with the volume of mud, after 30 minutes of equilibrium time, it is passed into the feeding tank at the front end of the magnetic separator, and 0.2% polyaluminum chloride solution and 0.002% polyacrylamide solution are added as additives, and 0.5% TS sludge is added. Hydrogen peroxide is fed after stirring for 30 minutes, and 2 wt% magnetic powder solution with a concentration of 10% is fed at the same time, and the residence time of the magnetic separator is 5 minutes. After magnetic separation, the efflue...

Embodiment 3

[0029] With the surplus sludge raw material of embodiment 1, the selected treatment process is the same as embodiment 1. Add 0.2% TS sludge triclocarban and 1.6% TS sludge nonylphenol polyoxyethylene ether and 1% TS sludge aluminum chloride and The panipenem of 1% TS sludge, other conditions are the same as embodiment 1. After magnetic separation, the effluent was collected, and the measured COD was 46mg / L, which met the requirements of the comprehensive sewage discharge standard. The separated solids are recovered by the magnetic powder recovery device, and the separated solids enter the stacked sludge dewatering machine for further dehydration. After dehydration, the moisture content of the mud cake is 42.5%, and the dehydrated water is returned to the feeding tank of the magnetic separator, and the sludge and sewage Simultaneous processing, no secondary pollution.

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Abstract

The invention discloses a wall breaking and deep dewatering treatment method for remaining sludge. According to the treatment method, remaining active sludge is fed into a wall breaking homogenizationgroove; a treating agent is added into the homogenizing groove; the treated sludge is subjected to osmotic pressure impact wall breaking; the wall-broken sludge is introduced into the feeding grooveof a magnetic separator, a water treatment agent, an auxiliary agent and magnetic powder are added, and a reaction is performed for a certain time; magnetic separation is performed, and solid-liquid separation is performed while the sewage is treated; and the separated water can be directly discharged or circulated, the separated solid is further subjected to dewatering treatment after magnetic powder recovery, and the sludge after the dewatering has a water content of less than or equal to 45%, and can be used as the further resource raw material.

Description

technical field [0001] The invention relates to a treatment method for excess sludge, in particular to a wall-breaking deep dehydration method for excess sludge. Background technique [0002] The treatment of excess sludge has become a restrictive factor for the popularization and operation of sewage biological treatment technology. The first principle to solve the treatment and disposal of excess sludge is sludge reduction. Sludge reduction includes sludge mass reduction and volume reduction, that is, reducing sludge production and reducing sludge volume. Traditional sludge treatment mainly uses methods such as concentration, dehydration and drying to reduce the moisture content of sludge to facilitate subsequent treatment and disposal. However, there are generally problems such as low processing efficiency and high cost of medicaments. [0003] The main reason affecting the sludge dewatering efficiency is the water in the sludge extracellular polymer (EPS) and the limita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/127C02F11/122C02F11/123C02F11/121
Inventor 吴巍回军孙浩程刘春阳李宝忠
Owner CHINA PETROLEUM & CHEM CORP
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