Flocculation–Membrane bioreactor for treatment of septic tank effluent

• Main Authors: Ya-Chi Chang, 張雅琪
• Other Authors: Chia-Yuan Chang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/00815207164248194687

碩士 === 嘉南藥理科技大學 === 環境工程與科學系暨研究所 === 98 === In order to determine the effect of Flocculation on MBR performance of septic tank effluent. The system was operated at sludge retention time 20 days and HRT 6 hours, the cationic polyacrylamide gelling agent of the different dosage of Flocculation - membrane bioreactor treatment efficiency of septic tank effluent. This experiment is divided into four stages, the effective reactor volume of 12L, bio-film continuous aeration tank, the first stage of domestication and early for the sludge, after the MBR plant species tank sludge concentration 4000 mg / L. Experimental control of the whole hydraulic retention time 6 hr, SRT 20 days, experimental films pumping stop time for 5 minutes per 1 minute. Stages described as follows: The second stage is to add microbial growth and stability of no gelling agent, the third stage and fourth stage of adding different doses of CAPM. The gelling agent additive amount of cationic concentration, is a reference for the study of this system to another experiment data to determine the dose. In the third stage to add 0.1 mg / L CPAM, the fourth stage, add 2 mg / L CPAM. From the data obtained in analysis experiments, The results showed that he turbidity of were about 6.5-136 NTU. Of the turbidity, the effluent of the system, range was 0.08-1.58 NTU, t it can achieve turbidity reduction by 98.32%. The system cannot effectively use the MF membrane to remove of TDS. it can achieve TCOD and SCOD by removal rate, the stage of third and fourth, in film to add bio-reactor C-PAM, compared with the second stage of the COD removal efficiency increased significantly. About the nitrification, we found that adding C-PAM and fourth stages of the third of a downward trend in nitrate. and look of the TN data, we can find to their C-PAM concentration was increase in the MBR, the TN removal efficiency of the increase. And the fourth stage of the average TN removal rate of about 75.19%, the best removal rate was 82.90% In various stages of conversion rate of ammonia are more than 99%, followed by can see the obvious increase of the C-PAM agent, the water ratio for lower than average in their food micro 0.4 Kg NH3/MLVSS day.