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A persulfate cascade oxidation coupled membrane water filtration device and its operating method

A technology of oxidation coupling and persulfate, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor pollutant removal effect, high pollutant removal rate, oxidant Oxidation efficiency is not high, to achieve the effect of alleviating ceramic membrane pollution, strengthening coagulation effect, and improving membrane flux

Active Publication Date: 2022-03-01
SHANDONG JIANZHU UNIV
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Problems solved by technology

[0006] The present invention aims at the membrane fouling phenomenon existing in the existing ceramic membrane water treatment process, as well as the problems of low oxidant oxidation efficiency and poor pollutant removal effect in the existing oxidation and ceramic membrane combined process, and provides an integrated oxidation-coagulation , Oxidation-adsorption and catalytic oxidation in one persulfate cascade oxidation coupling membrane water purification device, the device uses Fe 2+ , Activated carbon and catalytic ceramic membrane have the activation characteristics of persulfate, good purification effect and high pollutant removal rate

Method used

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  • A persulfate cascade oxidation coupled membrane water filtration device and its operating method
  • A persulfate cascade oxidation coupled membrane water filtration device and its operating method

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Embodiment

[0066] Test process parameters: the primary oxidant uses permonosulfate (PMS), FeSO 4 The dosage ratio of PMS and PMS is 1:1, and the dosage is 0.05mmol / L; the secondary oxidant uses PMS, and the dosage is 0.15mmol / L; the membrane module adopts manganese oxide-coated catalytic ceramic membrane, and the molecular weight cut-off is 150kDa.

[0067] Raw water quality: Turbidity is 1.2-3.5NTU, dissolved organic carbon (DOC) is 4.37-5.82mg / L, permanganate index (COD Mn ) is 4.65-6.18mg / L, and the ultraviolet absorbance (UV 254 ) is 0.067-0.081cm -1 , the trace pollutants Atrazine and Sulfamethoxazole were added in the way of standard addition, and the initial concentration was 200 μg / L.

[0068] Effluent water quality: Turbidity is 0.06-0.09NTU, DOC is 1.26-1.71mg / L, COD Mn 1.35-1.92mg / L, UV 254 0.005-0.007cm -1 , atrazine <1 μg / L, sulfamethoxazole <1 μg / L.

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Abstract

A persulfate cascade oxidation coupling membrane filtration water purification device and its operation method, the device includes a water inlet pipe, an oxidation-coagulation reaction zone, a sloping plate sedimentation zone, an oxidation-adsorption reaction zone and a catalytic oxidation reaction zone; the water inlet pipe passes through The raw water pump is connected to the oxidation-coagulation reaction zone, and the liquid outlet of the oxidation-coagulation reaction zone is connected to the inclined plate sedimentation area. The inclined plate sedimentation area is equipped with a inclined plate and a water collection tank, and the water collection tank is connected to the oxidation-coagulation reaction area through a drain pipe. The adsorption reaction zone is connected, and the water outlet of the oxidation-adsorption reaction zone is connected with the catalytic oxidation reaction zone. During operation, the raw water enters the oxidation-coagulation reaction zone successively for oxidation-coagulation reaction, enters the inclined plate sedimentation zone to realize the separation of particles and water, enters the oxidation-adsorption reaction zone to realize the full contact reaction between activated carbon and oxidant, and enters the catalytic oxidation reaction zone. The purified effluent is discharged through the outlet pipe. The invention has high operating efficiency, good purification effect and high pollutant removal rate.

Description

technical field [0001] The invention relates to a device for purifying water by coupling step oxidation of persulfate with membrane filtration and an operation method thereof, belonging to the technical field of membrane water treatment. Background technique [0002] Membrane separation technology is currently a research hotspot in the field of water treatment. Among them, ceramic membranes with more significant material performance advantages have attracted more and more attention in recent years. However, ceramic membranes have poor interception effect on trace pollutants, such as drugs and personal care products in water, endocrine disruptors, antibiotics, etc., and membrane fouling will occur during long-term operation, which are the bottlenecks restricting its further development. [0003] Pre-membrane pretreatment is the main way to solve the above problems, through the use of coagulation, adsorption and oxidation to achieve the purpose of strengthening pollutant remov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
Inventor 成小翔武道吉周伟伟谭凤训王凯罗从伟李沛洁
Owner SHANDONG JIANZHU UNIV
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