Application of silicon carbide membrane in drinking Water Treatment

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At present, both SiC tubular membranes and SiC flat sheet membranes produced by JMFILTEC  have been used for high-quality purification of drinking water. The excellent hydrophilicity of silicon carbide materials and high-end recrystallization sintering technology have given silicon carbide membranes outstanding performance. The core advantages of silicon carbide membrane water purification system include:

    1. Effectively remove TLSS, bacteria and other harmful substances, and the turbidity of water production is less than 0.1NTU.

    2. High utilization rate of land, saving land occupation.

    3. Large working capacity per unit membrane area, 400LMH~1200LMH.

    4. High recovery ( tubular membrane system> 95%,  flat sheet membrane system> 98.5%).

    5. Flux is easy to recover, chemical consumption is low, and ozone technology can be used for pretreatment.

    6. Long service life (≥30 years).

How the silicon carbide flat Sheet Membrane works

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Silicon carbide membrane cleaning method

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CEB&CIP sprays the membrane surface through spray pipe to complete chemical cleaning, with low chemical consumption.

Chemicals sprayed on the membrane surface can quickly penetrate into the porous structure of the silicon carbide membrane surface, so that the pollution factors can be quickly digested after being infiltrated by chemicals, and this cleaning method can ensure that the water-producing side will not be contaminated by chemicals.

Introduction of silicon carbide membrane cake layer adsorption filtration process

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The adsorption process of flat sheet membrane and cake layer refers to an advanced filtration technology combining dynamic adsorption and ultrafiltration technology.

The ultrafine powder activated carbon was used as the adsorption layer and the silicon carbide flat plate membrane was used as the carrier of the adsorption layer to realize the full amount of water purification after adsorption and filtration.

Because of the whole adsorption-filtration process, the pressure that drives water molecules through the adsorption layer, the membrane layer and the support layer of the silicon carbide plate membrane to reach the water-producing side is very low, which can ensure that the adsorption layer remains loose all the time. This can balance efficient adsorption of PFAS and other harmful substances while ensuring high-flux filtration.

The biggest characteristic of the plate membrane filter cake layer adsorption and filtration process is that each water molecule and PFAS and other harmful substances must go through the process of adsorption and filtration first, and the entire adsorption-filtration flow channel is evenly distributed with short travel.

According to the different pollution factors in the water source, different ultrafine powder materials can be selected as the fillers of the cake layer.

Currently, the pollution factors verified to be able to be removed include: PFAS, dissolved organic carbon (DOC), volatile organic compounds (VOC), trihalomethanes (THM), humic acid, drug residues, odor, taste and color removal.

Working principle and cleaning method of silicon carbide tubular membrane

1、Silicon carbide membrane filtering process (dead end filtering)

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2. Silicon carbide membrane backwashing process                                                                 

 backwash process.png1) Only the working pressure < 3bar is needed in the filtering process, and the operating pressure up to 10bar is supported in extreme cases;

 2) High pressure backwashing is supported, with backwashing pressure above 5bar to ensure efficient cleaning of pollution factors;

 3) Use compressed air to flush the filter runner of membrane elements, and clean without dead Angle.

3. Silicon carbide membrane blowing process

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