Biological Treatment of copper-containing NMF/MDG organic wastewater from the TFT-LCD Industry

  • 卞 宗馨

Student thesis: Master's Thesis

Abstract

In this study the feasibility for treating copper-containing organic wastewater from TFT-LCD manufacturing process industry was investigated N-methylformamide (NMF) and diethylene glycol monomethyl ether (MDG) were the main components detected in the copper-containing wastewater Therefore the biodegradations of NMF and MDG as well as the effects of copper were examined under anoxic and aerobic condition using batch tests Under aerobic and anoxic condition NMF and MDG could be successfully degraded and no inhibition was observed either on nitrification or denitrification at concentrations up to 1000 mg/L and 800 mg/L respectively The released ammonia from NMF under aerobic condition also showed no inhibition on NMF degradation and the following nitrification even when S0/X0 reached 0 28 By adding copper containing wastewater the result showed that denitrification had a lower tolerance on copper than nitrification process and denitrification rate decreased by 39 % at 5 mg/L of copper The degradation of MDG was also affected under anoxic condition implying that the existence of copper might inhibit denitrification by slowing down the utilization of carbon source rather than nitrate reduction Furthermore lab-scale A/O SBR was operated for 87 days by adding 0 5 mg/L of copper per day with sludge retention time (SRT) at 20 days A/O SBR performance of NMF MDG COD and nitrogenous species removal was good showing microorganisms might be able to adapt the copper-containing environment under proper operation
Date of Award2018 Aug 15
Original languageEnglish
SupervisorLiang-Ming Whang (Supervisor)

Cite this

Biological Treatment of copper-containing NMF/MDG organic wastewater from the TFT-LCD Industry
宗馨, 卞. (Author). 2018 Aug 15

Student thesis: Master's Thesis