Dying Wastewater Treatment by Immobilized High Efficiency Decolorzing Bacteria in Membrane Bio-reactor

• Main Authors: Sheng-Jhong Hou, 侯勝中
• Other Authors: Sheng-jie You
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/09587852326964309912

碩士 === 中原大學 === 土木工程研究所 === 97 === A Bacillus cereus bacteria having high RB5 dye color removal efficiency was isolated from an anaerobic-aerobic reactor and utilized in this study for treatment of RB5 containing wastewater. The immobilized bacteria were prepared by immobilizing bacteria on PVA-aglinate beads (size 4-5 mm) as base substrate. In this study, the efficiency of RB5 dye removal and membrane fouling using anaerobic MBR (AnMBR) were compared with equivalent suspended and immobilized bacteria bioreactor system. Additionally, batch experiment were performed to study the dye adsorption characteristics, effect of initial dye concentration, durability and reuse capacity of immobilized cells. Results showed that immobilized system was capable of treating higher concentration (200 mg/L) as compared o suspended system. Immobilized bacteria can be reused 16 times for the dye concentration of 400 mg/L in a day. In the decolorizing experiment, it was observed that the bacteria run out from immobilization and grew in the medium. Further study using an anaerobic MBR system showed that the immobilized bio-cells system was capable of performing efficiently and equivalent to suspended bio-cells system with an advantage of lower membrane fouling. The performance of COD removal was almost similar in both type of reactor systems where as the dye removal and ADMI removal was slightly different. It was observed that the membrane fouling was faster (nearly two times) in suspended bacteria system as compared to immobilized system.