應用缺氧/好氧薄膜生物反應槽 處理高科技產業廢水

• Main Author: 洪政新
• Other Authors: 王建明
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/72483679116055141810

碩士 === 弘光科技大學 === 環境工程研究所 === 100 === In the optoelectronic and semi-conductor industries, a large amount of pure water and chemicals is required in the manufacture processes. Therefore, a significant amount of wastewater will be generated. No matter from the view of treatment or reuse, membrane bioreactor (MBR) technique has been developed maturely and applied to the sanitary sewage, livestock wastewater, and different industrial wastewaters. In this study, an anoxic procedure combined MBR system is used to treat the high-tech wastewater from a wastewater treatment plant of a science industrial park. The purposes of this study are: (1) to examine the effect of A/O-MBR technique on the treatment of high-tech wastewater with low C and high N contents; (2) to test the optimal operation parameters of the A/O-MBR for this particular high-tech wastewater. In this study, different hydraulic retention time (HRT - 7 and 15 hrs),different sludge retention time (SRT – 10, 20, and 30 days), and addition of extra carbon source (methanol) were examined for the treatment efficiency of A/O-MBR system. The results showed that the removal efficiencies of COD and BOD5 in effluents were above 60% and 70%, respectively, at different conditions. The removal efficiencies of COD and BOD5 in effluents can reach to 88% and 90% at the conditions of SRT 30 days and the addition of methanol (extra C source). For NH3-N, the removal efficiencies were 29% and 28% at HRT 7 hrs and 15 hrs, respectively. It means the increase of HRT has no obvious effect on the removal of NH3-N. However, the increase of SRT to 20 or 30 days, the removal efficiencies of NH3-N can increase to 69% and 56%, respectively. In other words, 20-days SRT is better than the 30-days SRT for the removal of NH3-N.