Reverse osmosis (RO) membrane technology is a membrane separation operation that separates solvents from a solution by using pressure differential as the driving force. When pressure is applied to the liquid on one side of the membrane, the solvent will undergo RO in the opposite direction of natural permeation, once the pressure exceeds its osmotic pressure. This results in the permeate, or solvent that passes through the low-pressure side of the membrane, and the concentrate, or concentrated solution, that forms on the high-pressure side.
In recent years, membrane technology has made significant progress in the performance research and development in the treatment of coal chemical wastewater. The RO membrane technology employs tough and durable anti-high-pressure membrane technology, which can extend the service life of traditional anti-fouling membrane components by more than 50%. Increasing the thickness of the membrane layer avoids problems such as uneven coating and unstable desalination rate of the membrane components.
Papermaking wastewater is a type of organic wastewater with high concentration, poor biodegradability, high toxicity, foul odors, high foam, difficult to process, and easy to cause severe environmental pollution. RO membrane technology is a pure physical operation process that does not involve chemical reaction and is energy efficient in treating papermaking wastewater. A regeneration cleaning device is also designed online, which reduces labor intensity and production costs while improving production efficiency. The water extracted is better than tap water and is mainly used to replace paper machine water, boiler feed water, and cooling water supply. It greatly reduces the discharge of industrial wastewater, improves water resource utilization efficiency, promotes a circular economy, and has good economic and social benefits. The RO membrane component has a large filling area, a small system footprint, and is suitable for technical transformation, expansion, or new projects, which can effectively reduce production costs and operating investment in papermaking wastewater treatment.
Chemical production wastewater contains toxic substances such as cyanide, phenol, arsenic, mercury, cadmium, and lead. When discharged into the water, it consumes a large amount of dissolved oxygen, leading to oxygen depletion in the water body. Toxic heavy metals also accumulate in the body for a long time, causing poisoning. Chemical production wastewater with high nitrogen and phosphorus content discharged into the water can increase the nitrogen and phosphorus content in the water, which causes excessive reproduction of algae and other aquatic plants, resulting in eutrophication of the water body, causing fish to suffocate and even die. Anti-pollution RO membrane technology is a new type of membrane component with anti-pollution design. It is made of high-quality anti-pollution membrane material and can effectively purify polluted water bodies. The anti-pollution RO membrane technology adopts wide inlet channels, which reduces the possibility of membrane components being contaminated and blocked. Compared with ordinary RO membranes, it is more suitable for the efficient treatment of chemical wastewater and has good economic and environmental benefits.