Research On The Novel Process For Carbon And Nitrogen Removal From High Strength Rice Wine Wastewater

With the rapid development of industry in china and broad using of saving-water technology in industry, the industry wastewater is characteristic of containing high organic matters and rich total nitrogen, resulting in the wastewater treatment difficulties and increasing of the treatment cost. The distillery wastewater of Guangdong Jiujiang Distillery was treated by a combination of methane fermentation and denitrification and nitrification processes. Two identical EGSB (expanded granule sludge bed) reactors were respectively used for COD and nitrogen removal by methane fermentation and deniteification with nitrification circulation from Guangdong Jiujiang distillery wastewater. A combination of denitrification and methanogenesis and Anammox process for simultaneous removal of carbon, nitrate and ammonia of the anaerobically pretreated distillery wastewater in denitrifying EGSB reactor at different COD/TN ratios was studied. Nitrification process adopted PEG-immobilized nitrifying bacteria pellet supplied by Japan Hitachi Plant Engineering & Construction Co., Ltd for obtaining high nitrification efficiency. Additionally, the activated sludge unit, that is, the aerobic contact oxidization reactor before the nitrification reactor is necessary in order to prevent the growth of BOD oxidizing bacteria in the nitrification reactor at the most. After the foundation research on each reactor in system, the performance of the overall sequential system with recirculation from the nitrification to the denitrification reactor for COD and N removal was evaluated.The maximum COD volumetric loading rate (CVLR) of the first-stage EGSB reactor...