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Method for treating and recycling sludge water by ozone and ceramic membrane combined process

A combined process, ceramic membrane technology, applied in the oxidation water/sewage treatment, water/sludge/sewage treatment, water/sewage treatment and other directions, can solve the problem of large area, large dewatering energy consumption, difficult control of chemical conditioning and other problems, to achieve the effect of membrane fouling mitigation and membrane fouling

Pending Publication Date: 2020-06-05
佛山市三水佛水供水有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a method for treating and reclaiming sludge discharge by a combined process of ozone and ceramic membrane, aiming at the treatment and reuse of sludge discharge from waterworks, so as to solve the problems of existing treatment processes in the treatment of discharge water. Sludge water treatment facilities occupy a large area, chemical conditioning is difficult to control, and dehydration consumes a lot of energy, etc., and improve the quality of recycled water to ensure drinking water safety

Method used

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  • Method for treating and recycling sludge water by ozone and ceramic membrane combined process
  • Method for treating and recycling sludge water by ozone and ceramic membrane combined process
  • Method for treating and recycling sludge water by ozone and ceramic membrane combined process

Examples

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Embodiment 1

[0029] A kind of ozone and ceramic membrane combined process is to the method for sludge water treatment and recovery, such as figure 1 shown, including the following steps:

[0030] 1) The lifting pump 4 sends the sludge discharge water from the raw water tank 3 to the tubular static mixer 5, and at the same time, the dosing pump 2 pumps the flocculant from the flocculant tank 1 into the mixer. The amount and type of flocculant should be determined according to water quality, reaction time and water volume. The sludge discharge water and flocculant are fully mixed in the tubular static mixer 5 to obtain a mixed solution. The flocculant is polyaluminum chloride.

[0031] 2) The sludge-water mixture overflows from bottom to top in the tubular static mixer 5 into the ceramic membrane tank 6, and the ozone generated by the ozone generator 11 is aerated through the titanium rod 7 below the ceramic membrane module 9, and fully mixed Ozone and muddy water. On the one hand, due t...

Embodiment 2

[0038] The steps of embodiment 2 are the same as embodiment 1. In this embodiment, the turbidity of the sludge discharge water is 500NTU, the dosage of PAC is 5mg / L, and the ceramic membrane module 9 is a flat ceramic membrane made of Al 2 o 3 , with an average pore size of 50nm. The membrane flux is 90L / (m 2h), the transmembrane pressure difference during filtration is -10kPa~0kPa, and the ozone dosage is 2mg / L. The backwashing cycle is 120s backwashing every 3600s of muddy water treatment. The cycle of automatic mud discharge is 7200s per running time, and the mud discharge time is 60s.

Embodiment 3

[0040] The steps of embodiment 3 are the same as embodiment 1. In this embodiment, when the mud discharge turbidity is 3000NTU, when the dosage of PAC is 15mg / L, the dosage of ozone is 15mg / L, and the ceramic membrane module 9 is a flat ceramic membrane made of Al 2 o 3 , the average pore size is 80nm. The membrane flux is 60L / (m 2 h), the transmembrane pressure difference during filtration is -20kPa~0kPa, and the backwash cycle is 3600s for every treatment of muddy water for 120s. The cycle of automatic mud discharge is 7200s per running time, and the mud discharge time is 60s.

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Abstract

The invention discloses a method for treating and recycling sludge water by an ozone and ceramic membrane combined process. The flocculation effect of an added flocculating agent and the filtering effect of a ceramic membrane are utilized to efficiently reduce turbidity in the sludge water; conventional pollutants such as organic matters and ferro-manganese metal oxides in the sludge water can beeffectively removed through the synergistic effect of the added ozone and the ceramic membrane, and microorganisms such as bacteria and viruses in the sludge water can be effectively removed through the oxidation effect of the ozone and the ultrafiltration effect of the ceramic membrane. Meanwhile, the introduced ozone also has a relatively good relieving effect on membrane pollution.

Description

technical field [0001] The invention relates to the technical field of sludge discharge treatment and recovery, in particular to a method for treating and recycling sludge discharge by a combined process of ozone and ceramic membranes. Background technique [0002] Sludge water from waterworks is produced during the process of "coagulation-sedimentation-filtration-disinfection" in the water purification process to produce drinking water. It is mainly sludge discharge from sedimentation tanks and backwash wastewater from filters. These two parts of wastewater account for about 4% to 7% of the water volume. The main pollutants in the sludge discharge water are particles, colloids, some organic matter, microorganisms and coagulants added, etc., which have the characteristics of high turbidity, high solid content, and low chemical oxygen demand. [0003] The disposal of sludge water from waterworks can be divided into two categories: direct discharge or reuse, and post-treatmen...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/5281C02F1/5236C02F1/78C02F1/44C02F2303/14
Inventor 董燕珊齐秋红许泽彬李佳宾张锡辉
Owner 佛山市三水佛水供水有限公司
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