Membrane technology plays an important role in the advanced treatment and recycling of industrial wastewater. Because of membrane technology, the new fluid separation unit operation technology based on polymer separation membrane is a model of energy saving and high efficiency, and the application effect of microfiltration, ultrafiltration, nanofiltration, and reverse osmosis is very good. Its scope of application is also very wide, including papermaking wastewater, metallurgical wastewater, chemical industry wastewater and other difficult wastewater treatment systems can see the shadow of membrane equipment and membrane technology, combined application cases are not uncommon. Of course, the quality of membrane equipment on the market is still somewhat uneven, and the norms and standards need to be improved.

OCRO membrane technology has been specifically developed for the characteristics of high-concentration, high-salinity wastewater.

The raw water enters the raw water tank to stabilize the water quality and quantity, and the suspended or colloidal impurities in the water are removed through the lifting of the lifting pump and the filtration of the multi-media filter, and the effluent of the multi-media filter further removes the suspended solids in the wastewater through the security filter, with a filtration accuracy of 10μm, providing the last protective barrier for the OCRO membrane. In order to prevent the fouling of various insoluble sulfates and silicates in the membrane module due to high concentration, and effectively prolong the service life of the membrane, a certain amount of scale inhibitor needs to be added before entering the OCRO. The amount of addition is determined by the concentration of insoluble salts in the raw water. The wastewater passing through the cartridge filter is directly boosted by an OCRO-W high-pressure pump and enters the first-stage OCRO-W system for treatment, and the first-stage OCRO-W demineralized water enters the production tank.

The first-stage OCRO-W brine enters the first-stage OCRO-L system through the action of the concentrated water booster pump and the pressure boost of the high-pressure pump, and the produced water of the OCRO-L system is mixed with the produced water of the first-stage OCRO-W system into the production tank, and the concentrated water enters the MVR evaporation crystallization system, and finally the salt is produced to achieve the purpose of zero discharge.