Title :
Anaerobic Treatment of Tetra-Methyl Ammonium Hydroxide (TMAH) Containing Wastewater
Author :
Chang, Kuan-Foo ; Yang, Show-Ying ; You, Huey-Song ; Pan, Jill Ruhsing
Author_Institution :
Energy & Environ. Res. Labs., Ind. Technol. Res. Inst., Hsinchu
Abstract :
Toxicity of tetra-methyl ammonium hydroxide (TMAH) was investigated in an upflow anaerobic sludge bed (UASB) by anaerobic toxicity assay test. System performance was determined by monitoring total organic carbon (TOC) and ion chromatograph (IC) analysis. The result indicates that TMAH concentration less than 10000 mg/L is nontoxic to the anaerobic archaea. TMAH containing in the wastewater was completely degraded under anaerobic condition and was transferred to biogas (CH4 and CO2) and NH3. The maximum volumetric loading of UASB is 6.95 kg TMAH/m3 -day (4.0 kg TOC/m3 -day) and 7.30 kg TMAH/m3 -day (4.1 kg TOC/m -day) for synthetic wastewater and wastewater from a full-scale thin-film transistor liquid crystal display manufacturing industry during the 240-day experiment, respectively. The removal efficiencies of THAM containing wastewater were both higher than 95% treated by UASB.
Keywords :
liquid crystal displays; organic compounds; thin film transistors; wastewater treatment; anaerobic condition; anaerobic toxicity assay test; full-scale thin-film transistor liquid crystal display manufacturing; ion chromatograph analysis; tetra-methyl ammonium hydroxide; total organic carbon; upflow anaerobic sludge bed; Biodegradation; Degradation; Liquid crystal displays; Microorganisms; Oxidation; Performance analysis; System performance; Testing; Thin film transistors; Wastewater treatment; Anaerobic; anaerobic toxicity assay (ATA) test; methanogen; tetra-methyl ammonium hydroxide (TMAH); thin-film transistor liquid crystal display (TFT-LCD); upflow anaerobic sludge bed (UASB);
Journal_Title :
Semiconductor Manufacturing, IEEE Transactions on
DOI :
10.1109/TSM.2008.2001227
