預臭氧結合生物處理TFT-LCD有機廢水之研究－以四甲基氫氧化銨（TMAH）為例

Abstract

Combining the chemical oxidation process and biological treatment process together to treat the recalcitrant or inhibitory organic pollutants is a well-known technology. Pre-oxidation processes will oxidize the organic pollutants to much more biodegradable byproducts so as to favor the following biological processes. This study focused on pre-ozonation enhancing the ability of biological treatment in treating the TFT-LCD wastewater and TMAH. But also, using different sludge domesticated by TFT-LCD wastewater and pre-ozonated TFT-LCD wastewater to compare between the short-term and long-term treatment effects. Firstly, the parameter of COD might underestimate the pollution of TFT-LCD wastewater, which is not a suitable indicator for accessing the efficiency of the biological treatment. Comparing with the result from OUR and BOD5 have the same tendency, that OUR could replace BOD5 as a indicator for fast accessing the ability of biological treatment unit. For TMAH, the pre-ozonation process could improve more than 30% efficiency in biological treatment process, comparing to non-pre-ozonation biological process. For TFT-LCD wastewater, in short-term consideration, pre-ozonation would inhibit the ability of biological process. But in long-term consideration, the pre-ozonation process would improve the overall treatment efficiency. Finally, this study also tried using ozone to mineralize TMAH and TFT-LCD wastewater. The result shows that the biological treatment especially with pre-ozonation process is more efficient in economy than AOPs.