| Summary: | 碩士 === 朝陽科技大學 === 環境工程與管理系 === 103 === This study analyzed the wastewater treatment efficiency of the wastewater generated from the manufacturing of TFT-LCD at a panel technology factory, based on the relevant wastewater characteristics. The wastewater first went through the Up-flow Anaerobic Sludge Bed (UASB) installed at the front-end treatment equipment. It then went through the traditional activated sludge in the middle section and the Membrane Bio-Reactor (MBR) provided at the tail end. Based on the trial run, raising and training, different operating conditions and parameter variance were analyzed.
The system operating conditions included the Cubic Meter per Day (CMD), pH value, Chemical Oxygen Demand (COD) and Oxidation-Reduction Potential (ORP). The system parameters included the Total Organic Carbon (TOC), Mixed Liquid Suspended Solid (MLSS), Membrane Bio-Reactor (MBR) and effluent pressure (kg/cm2). The effect of the various operating parameters on the system parameters, such as the effluent TOC, MLSS and MBR-membrane effluent pressure, were explored. The main purpose was to achieve the effluent standards. The most economical and effective operating conditions were assessed and utilized to adjust the on-site parameters during the process.
According to the results monitored during the study, the influent of UASB system in the factory is 70 CMD; the anaerobic tank pH value is 6.7; the anaerobic-ORP is -319 (mv); the anaerobic-MLSS is 14513 (mg/L); and the TOC is 29%; that of the aerobic system is 440 CMD; the traditional biological tank pH value is 7.0; the traditional biological tank-MLSS is 4509 (mg/L); the MBR-MLSS is 8541 (mg/L); the MBR effluent pH value is 6.5; and the aerobic system COD removal rate is 91%.
The average values of the results of MBR-A system operation are as follows: the cumulative effluent flow is 155.4 (CMD); and the effluent pressure is 1.0 (kg/cm2). The average values of the results of MBR-B system operation are as follows: the cumulative effluent flow is 161.5 (CMD); and the effluent pressure is 1.1 (kg/cm2). The average values of the results of MBR-C operation are as follows: the cumulative effluent flow is 161.5 (CMD); and the effluent pressure is 1.1 (kg/cm2).
According to the results monitored during the study, the effluent water quality is stable throughout the process of the system influent transferred from the anaerobic system to the aerobic system. The biomembrane reaction system in the factory has excellent treatment efficiency in improving the wastewater quality of the plant effluent.
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