Study Of Inorganic Membrane And It's Application In Wastewater Treatment

Membrane filtration technology is a recently developed new technology, membrane filtration technology is a promising and effective in papermaking and restaurant wastewater treatment. The preparation of inorganic membrane and it' s application and progress in wastewater treatment were introduced in this paper . their study directs and perspectives in the future were also discussed.The inorganic membrane— aerobic bioreactor was adopted to treat high concentrated restaurant wastewater, in which COD is higher than 15 000mg / L. The effects of the concentration of influent, dissolved oxygen and hydraulic retention time on removal efficiency of organic compounds had been studied. The results showed that COD removal efficiency were over 90% when hydraulic retention time was longer than 5.6 hours, and temperature had little effect on removal efficiency of organic compounds. The effluent of anaerobic treatment was separated by the inorganic membrane, the final results showed that COD and turbidity of final effluent were lower than 25 mg / L and 1 NTU respectively.Uses 0.2 μm and 0.8 μm micro filter membrane conducted the stalling characteristic research to the papermaking wastewater. The result indicates, the micro filter diaphragm seepage flux certainly is not elevates along with the temperature increases, the micro filter diaphragm is take temporarily stops the lignin focus to the organic matter separation as, has not temporarily stopped the function to the sodium salt, but has higher temporarily stop rate to the silicon, may reach above 80%.