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URN etd-0831110-132258 Statistics This thesis had been viewed 3084 times. Download 2567 times. Author Yi-Ming Ma Author's Email Address No Public. Department Bioengineering Year 2009 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 58 Title Advanced Treatment of Organic Wastewater from TFT-LCD Industry by Combination of EMMC Technology and Activated Sludge Process Keyword Wastewater treatment TFT-LCD EMMC Technology DMSO DMSO EMMC Technology TFT-LCD Wastewater treatment Abstract The organic wastewater from TFT-LCD industry contained dimethyl sulfoxide (DMSO) and high concentration of nitrogen compounds. After treated by the activated sludge process, the effluent contained high concentration of NH3-N. Furthermore, during the treatment it stank due to the formation of dimethyl sulfide from DMSO.
This work was engaged in an advanced treatment of this wastewater in a SBR by a combination of entrapped-mixed-microbial-cell (EMMC) technology and activated sludge (AS) process. The experiment fell into two parts.
Part I, 30 liters of wastewater was treated daily with 48 hrs of HRT. The COD and nitrogen removal efficiency achieved 88.3% and 84%, respectively, which is better than that by AS process alone, being 85.2% and 73.4%, respectively. In addition, the effluent contained 0.56 ppm NOx−N in the combination process of EMMC and AS, which is better than 2.96 ppm NOx−N by AS process.
Part II, 100 liters wastewater was treated daily with 24 hrs of HRT with 75 mL/d of methanol being fed to the wastewater. When compared with the AS process alone, the removal of N was improved, NH3-N in the effluent decreasing from 20 ppm to 10 ppm. By adding methanol, the formation of biomass was enhanced, and the phosphoric acid and DMSO were removed completely. Furthermore, the COD and nitrogen removal efficiencies of over 90% and 80%, respectively, were achieved.
Advisor Committee Dey-Chyi Sheu - advisor
Files Date of Defense 2010-07-26 Date of Submission 2010-09-01