The Effect of the Micro-biological Nutrients on the Biodegradability of the De-inking Agent on the Activated Sludge Wastewater Treatment Process

• Main Authors: Su, Yung-Jia, 蘇永嘉
• Other Authors: Chung Yan-Chun
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/98084925836522250052

碩士 === 中國文化大學 === 造紙印刷研究所 === 85 === The chelating agent of the wastewater in de-inking process is toxic to the activated sludge . To prevent its damage with the biomass is to decrease the concentration of the chelating agent , but the most cost efficiency method is to increase the activity of the activated sludge . In this study , the micro- biological nutrients is used to improve the treatment efficiency of the activated sludge processes , and the variation of the micro-biological nutrients should be identify . We need to know the variance . e experiment results showed that the micro- biological nutrient C had a higher biodegradable efficiency . Thus , the micro-biological nutrient C is used to test the DTPA toxicity . The effect concentration inhibiting the bacteria's respiration by 50 % ( EC50 ) is about 6,700 to 7,400 ppm . Wastewater discharge coming from the pulp and paper industry contains a multitude of difficult biodegradable components . The wastewater can be characterized as a highly variable . The main purpose of this study is to delop the cost efficiency modus of the treat ability of the organic wastewater by improving the biodegradability in biological treatment system . This research also aims to how to increase the treatment efficiency of the activated sludge , and acclimation the activated sludge using the different micro-biological nutrients , and discuss the biodegradation about 520 ppm methanol ( CH3OH ) by using the micro-biological nutrient C and the micro-biological nutrient A . The result is using the micro-biological nutrnt C can increase the maximum biodegradability rate about two times of the micro- biological nutrient A , and can reduce half of the reaction time than micro-biological nutrient A .