Treating dyeing waste water by ceramic membrane in crossflow microfiltration

Much work has been done on the dyeing water treatment by a new method of the combination of crossflow microfiltration, flocculation and ceramic membrane technique with some successful results caused by the advantages of the combination. The kind of flocculation and its dosage are studied, which is used to treat some wastewater. The best flocculation precepts are confirmed. And then, the effects on filtration rate are discussed. The CODcr and absorbency of sulfur black wastewater after treatment are up to national grade about drain wastewater. The CODcr and absorbency of 2,3-acidic wastewater and DSD acidic wastewater after treatment are also descend. Compared with organic membrane, ceramic membrane has exceptional performance of cleaning and regeneration. The results show that the dynamic filtration equipped with ceramic plate membrane as the filtration membrane has great advantages, and wide application future has been shown in membrane separation.

– The higher the disk rotary rate, the higher the filtration rate of sulfur black waste water. When disk rotaty rate at 800 r/min, the filtration rate of DSD acidic waste water is drop-off. – As o peration p ressure a t 0 .1 M Pa, t he filtration rate of waste water is the highest. – Dynamic filtration rate is higher than deadend filtration rate. – The CODcr and A of sulfur black waste water after treatment are up to national grade about drain waste water. The CODcr and A of 2,3-acidic waste water and DSD acidic waste water after treatment are also descend. – Compared with organic membrane, ceramic membrane has exceptional performance of cleaning and regeneration. – Practical exploration is made in handling waste water mixed with flocculent of dying and dye intermediate. The advantages of handling waste water of industry with rotary filter press are proved by experiments. The results show that the dynamic filter equipped with c eramic p late m embrane a s t he filtration membrane has great advantages. Wide application future has been shown in membrane separation.