Strain And Immobilization Of Degradation Of Chlorinated Paper Bleaching Wastewater Advantage

Treating bleaching wastewater in Guangdong sugarcane chemistry plant by cultivating and immobilizing bacteria technology is studied in this paper. There are many kinds of organic chlorine which are hard to degrade in the wastewater.Acclimate activated sludge with bleaching wastewater, isolate and depurate some single bacterium, select effective dominant bacteria with the removal of CODcr and organic chlorine as indicatrix and immobilize them to improve the removal of organic chlorine in bleaching wastewater.We get eighteen single bacteria from the activated sludge acclimated, choose ten growing well bacteria to degrade bleaching wastewater of 30% and 50% and screen the dominant bacteria as j^ A6> B3% C2.Using the dominant to degrade wastewater, we discuss how wastewater concentration, pH, inoculation quantity and glucose affect the removal of CODcr and organic chlorine. The results show that the removal of CODcr and organic chlorine are best when the wastewater concentration is 50%, pH is 7 and inoculation quantity is 2ml. Adding some glucose can stimulate the degrading of organic chlorine and the removal of organic chlorine is improved as adding more glucose. We choose 0.4g/L considering economy and treatment efficiency.We get the best immobilized carrier and ingredient are 12% PVA and double deck gauze, adding 3% SiOz, 0.4% sodium alginate, 0.3% CaCOs.We immobilize single bacteria to treat wastewater and comparing the removal efficiency with different wastewater concentration and bacteria quantity embedded. The results show that wastewater concentration is the greater factors which affect the removal efficiency. The best conditions are wastewater 50%, bacteria quantity embedded 0. 6%.Mix every two immobilized single bacterium to treat wastewater and the results show that the treatment efficiency is better than immobilizedAbstractsingle bacterium and dissociation bacteria. The best treatment efficiency is organic chlorine 85.1%, CODcr 45. 7%. The removal of organic chlorine and CODcr fluctuate with time.The analytic results obtained by GC-MS show that a majority of organic chlorine can be degraded by the mixed immobilized single dominant bacteria.In addition, the mechanism of organic chlorine degraded is discussed in details.