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Integral membrane coagulation reactor (MCR) and water treatment technology

A membrane coagulation, integrated technology, applied in the fields of flocculation/sedimentation water/sewage treatment, water/sewage treatment, biological water/sewage treatment, etc. The problems of easy precipitation of pores and particles can achieve the effect of reducing floor space, low operating cost, and convenient operation and management.

Inactive Publication Date: 2016-09-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pollutants enter the membrane treatment system directly after coagulation. The particles are large, and it is not easy to adsorb / block the membrane pores. The degree of membrane pollution is relatively light, but the particles in the membrane tank are easy to settle, resulting in large sludge discharge volume and sludge discharge frequency.

Method used

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  • Integral membrane coagulation reactor (MCR) and water treatment technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment is raw water treatment, and the content of dissolved organic carbon (DOC) in the water to be treated is 2-10 mg / L. Conventional coagulation membrane treatment process (conventional equipment including independent coagulation unit, precipitation unit and membrane treatment unit) is adopted. Continue to add aluminum salt coagulant, calculated as aluminum, 5mg / L per day. Among them, the mechanical stirring is fast rotation (200rpm) 1min, slow rotation (50rpm) 15min. Pump the raw water into the coagulation tank, and after passing through the sedimentation tank, use 1m 3 / h enters the membrane pool, and the hydraulic retention time in the membrane pool is 0.5h. The sludge is discharged through the sedimentation tank, and the frequency of sludge discharge is 3 days / time. After 30 days of continuous operation, the transmembrane pressure difference increased to 48kPa, and the removal rate of DOC in the effluent was 79%.

Embodiment 2

[0034] This embodiment is raw water treatment, and the content of dissolved organic carbon (DOC) in the water to be treated is 2-10 mg / L. Short-flow process (conventional equipment including independent coagulation unit and membrane treatment unit) is adopted. Continue to add aluminum salt coagulant, calculated as aluminum, 5mg / L per day. Among them, the mechanical stirring is fast rotation (200rpm) 1min, slow rotation (50rpm) 15min. Pump the raw water into the coagulation tank, and with 1m 3 / h enters the membrane pool, and the hydraulic retention time in the membrane pool is 0.5h. Continuous operation for 30 days, mud discharge frequency is 3 days / time. Stand still for 30 minutes each time the sludge is discharged, and open the sludge discharge valve at the bottom of the membrane tank to discharge half of the sediment. After 30 days of continuous operation, the transmembrane pressure difference increased to 42kPa, and the removal rate of DOC in the effluent was 81%.

Embodiment 3

[0036] refer to figure 1 As shown, in an exemplary embodiment of the present invention, an integrated membrane coagulation reactor includes: a membrane tank 1, a membrane module 2 and an aeration device 3 arranged in the same membrane tank; the membrane tank 1 passes through the tube The series series suction pump 4 is connected with the coagulant dosing pool 5. The membrane module 2 is also connected with the vacuum pressure gauge 6 through pipelines. The reactor is also provided with a water outlet 7 of the membrane pool. A sludge discharge valve 8 is also provided at the bottom of the membrane pool 1 .

[0037] This embodiment is raw water treatment, and the content of dissolved organic carbon (DOC) in the water to be treated is 2-10 mg / L. Using the integrated membrane coagulation reactor and water treatment process of the present invention, such as figure 1 As shown, the coagulant dosing tank 5 contains aluminum salt coagulant, and the membrane module 2 and the aeratio...

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Abstract

The invention provides an integral membrane coagulation reactor (MCR) and a water treatment technology. The integral MCR comprises a membrane pool, and a membrane component and an aerating apparatus which are arranged in the same membrane pool. A coagulant is injected into the membrane pool while aeration is carried out at the bottom of the membrane pool, and the aeration rate is more than or equal to 0.05L / min, so that the coagulant is evenly dissolved in the membrane pool, and the particle sizes of flocs are enabled to stably increase. The contaminants are effectively removed by the coagulant, so that the transmembrane pressure difference increment caused by the contaminants is slowed down. The water quality of effluent is guaranteed by utilizing the interception performance of an ultrafiltration membrane. Furthermore, the surface of the membrane is not damaged by the flocs in a running process. The flocs are continuously formed in the membrane pool, so that the flocs are large in density, sludge is conveniently discharged, and less sludge is left. The integral MCR and the water treatment technology can reduce the occupied area to a great extent while guaranteeing contaminant removal efficiency and retarding membrane fouling. The integral MCR and the water treatment technology can be used for treating drinking water of a contaminated water source, and are also applied to urban sewage plant treatment and reclaimed water purification.

Description

technical field [0001] The invention belongs to the technical field of water treatment and membrane pollution control, and in particular relates to an integrated membrane coagulation reactor (MCR) and a water treatment process. Background technique [0002] The conventional water treatment process (coagulation-sedimentation-filtration-disinfection) has been applied for more than 100 years, but with the continuous improvement of water quality pollution and water quality requirements, the conventional process is becoming more and more unsuitable. When people are highly concerned about water quality health risks and are working hard to deal with the technical challenges it brings, new principles, new methods and new processes for water quality security are undergoing positive changes in the actual needs of solving problems. In the process, people regard the application of new materials as the focus of breakthroughs, trying to provide scientific methods and technology for improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F1/52
CPCC02F1/5245C02F3/1268Y02W10/10
Inventor 曲久辉马百文王兴刘会娟刘锐平兰华春
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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