Cathode and anode built-in ceramic micro-filtration membrane reactor suitable for removing pollutant in source water

A technology of ceramic microfiltration and membrane reactor, which is applied in the direction of water pollutants, water/sewage treatment, water/sewage treatment equipment, etc., can solve difficult removal problems, achieve high removal rate, low treatment cost, and low energy consumption Effect

Active Publication Date: 2017-09-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Toxic and non-biodegradable organic pollutants discharged into water bodies by urban industry and ag

Method used

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  • Cathode and anode built-in ceramic micro-filtration membrane reactor suitable for removing pollutant in source water
  • Cathode and anode built-in ceramic micro-filtration membrane reactor suitable for removing pollutant in source water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: a kind of cathode and anode built-in ceramic microfiltration membrane reactor, and its production process is such as figure 1 As shown in the figure, firstly, the sol-gel with Sn:Sb ratio of 9:1 was repeatedly coated on a titanium mesh with a pore size of 100 μm, a thickness of 200 μm and a size of 5 cm × 8 cm, and then dried and calcined to obtain Sb-doped titanium-based SnO. 2 Electrode (A) with TiO supported by sol-gel method 2 , to get the supported TiO 2 Titanium based SnO 2 -Sb 2 O 5 Electrode (B), combine (A) or (B) electrode with ZrO 2 and Al 2 O 3Composition, pore size of 0.1-0.4 μm, ceramic microfiltration membrane size of 5 cm × 8 cm were laminated to obtain a ceramic microfiltration membrane anode. A titanium mesh with a pore size of 100 μm, a thickness of 200 μm, and a size of 3 cm×6 cm was placed in the PVC membrane support as the cathode, and a piece of ceramic microfiltration membrane anode was bonded to each side of the cathode to o...

Embodiment 2

[0023] Using the cathode and anode built-in ceramic microfiltration membrane reactor, in the filtration mode, the membrane separation performance of the electrochemical ceramic microfiltration membrane module was tested, and the experimental parameters were set as: flux 139 L / (m 2 • h), add 100 mg / L SiO to the water 2 Particles (particle size is 2μm), the influent turbidity is 32 NTU, and the measured effluent turbidity remains around 0.9 NTU.

Embodiment 3

[0025] The system in Example 1 was used to treat simulated low-concentration p-chloroaniline (PCA) wastewater. The experimental parameters were set as follows: the influent was 10 μM PCA, the initial pH was controlled to be 7, and the electrolyte was 50 mM Na 2 SO 4 , using a regulated DC power supply to provide an external voltage of 3 V, and setting up two electrochemical ceramic membrane reactors, respectively using Ti / SnO 2 -Sb and Ti / SnO 2 -Sb / TiO 2 -SnO 2 as an anode. The two reactors were set to operate in batch operation mode, and the electrolysis time was 4h; the two reactors were set to operate in continuous flow operation mode, and the electrochemical microfiltration membrane module was operated at a flux of 35 L / (m 2 • h) Operation (hydraulic retention time 4 h). Within a reaction time of 4 h, the Ti / SnO 2 -Sb group achieved 26% and 66% removal of PCA in batch and continuous flow modes, respectively, while Ti / SnO 2 -Sb / TiO 2 -SnO 2 The PCA removal rates of...

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PUM

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Abstract

The invention relates to a cathode and anode built-in ceramic micro-filtration membrane reactor suitable for removing pollutant in source water. According to the invention, titanium mesh is taken as cathode, an Sb element-doped titanium-based SnO2 coating A electrode or a mixed coating B electrode with TiO2 and SnO2 loaded on the basis of the A electrode serves as an anode, and the cathode faces to two sheets of anodes and is placed into a micro-filtration membrane module. The reactor applies extra electric field by constant voltage DC source, and operates under a continuous flow mode, the particles and colloid in source water can be filtered by the ceramic micro-filtration membrane with the aperture of 0.1-0.4 [mu]m, under electrocatalysis effect, a lot of substances with strong oxidizability is generated in water, and removal of the organic pollutants which are difficultly degraded is realized. doping of Sb can obviously increase the conductivity of SnO2, the coating of the electrode has physical sorption effect on HO., and has important effect for degrading an intermediate. According to the invention, TiO2 cavity loaded on the surface of the electrode provides more places for H2O for forming HO. with an adsorption state and organic matter molecules in a solution on the anode through discharging, so that the catalytic oxidation effect of the electrode is enhanced.

Description

technical field [0001] The invention belongs to the fields of environmental protection and water treatment, and in particular relates to a cathode and anode built-in ceramic microfiltration membrane reactor suitable for removing pollutants in water source water. Background technique [0002] Contamination of water bodies by man-made organic chemicals has become a serious problem, with large amounts of organic pollutants discharged into sewage and accumulated in natural water bodies. The recent Water Framework Directive is addressing this issue to ensure good water quality and a healthy ecology. system. Toxic and difficult to biodegrade organic pollutants discharged into water bodies by urban industrial and agricultural activities are usually difficult to remove by conventional sewage treatment methods. Electrochemical advanced oxidation methods (EAOPs) are an emerging environmentally friendly technology for treating such pollutants in wastewater. [0003] Membrane separati...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/44B01D61/42
CPCB01D61/42C02F1/46109C02F1/4672C02F2001/46138C02F2101/30C02F2201/46115C02F2303/16
Inventor 王志伟徐少萍郑君健王巧英吴志超
Owner TONGJI UNIV
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