Application of Daphnia magna toxicity test to evaluate treatment efficiency of TMAH wastewater using a modified UASB system

• Main Authors: Wei-Ming Chen, 陳韋名
• Other Authors: Jie-Chung Lou
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/qgtu9d

碩士 === 國立中山大學 === 環境工程研究所 === 104 === This study was focused on treating artificial wastewater containing Tetramethyl -Ammonium Hydroxide (TMAH) by using the Anaerobic Biological Treatment Process (ABTP) combined with an anaerobic and an aerobic Membrane bioreactor (MBR) in laboratory. The treatment efficiency and the Daphnia acute toxicity of the effluent of a biological system were tested and discussed. The main operation factors in treatment systems were the pH and hydraulic retention time (HRT) in all tests. According to the results of effluent bio toxicity after the treatment, we found when pH = 10 and 8, TUa were at 0 by Up-flow Anaerobic Bioreactor (UASB) with anoxic and aerobic MBR; when pH = 6 TUa was 3.27. In UASB + aerobic MBR, TUa in effluent was increased to 7.5. Higher pH was to increase treatment efficiency and to decrease acute toxicity. For the effect of different HRT operation on acute toxicity, when HRT was at 10 hr, two kinds of water treatment systems had the same TUa values in effluent. With the HRT of UASB becoming smaller, results of two kinds of biological systems showed the TUa of treated effluent have larger differences. As the HRT was at 1.25hr, TUa of two kinds of water treatment systems of were high, it represented treatment efficiencies were poor when the short hydraulic retention time was short. Generally the treatment efficiency of TUa by UASB + anaerobic MBR was better than that of UASB + aerobic MBR.