Sirianuntapiboon Suntud, Sansak Jutarat
Department of Environmental Technology, School of Energy Environment and Materials, King Mongkut's University of Technology, Thonburi, Bangmod, Thung-kru, Bangkok 10140, Thailand.
J Hazard Mater. 2008 Nov 30;159(2-3):404-11. doi: 10.1016/j.jhazmat.2008.02.031. Epub 2008 Feb 17.
The GAC-SBR efficiency was decreased with the increase of dyestuff concentration or the decrease of bio-sludge concentration. The system showed the highest removal efficiency with synthetic textile wastewater (STWW) containing 40 mg/L direct red 23 or direct blue 201 under MLSS of 3,000 mg/L and hydraulic retention time (HRT) of 7.5 days. But, the effluent NO(3)(-) was higher than that of the influent. Direct red 23 was more effective than direct blue 201 to repress the GAC-SBR system efficiency. The dyes removal efficiency of the system with STWW containing direct red 23 was reduced by 30% with the increase of direct red 23 from 40 mg/L to 160 mg/L. The system with raw textile wastewater (TWW) showed quite low BOD(5) TKN and dye removal efficiencies of only 64.7+/-4.9% and 50.2+/-6.9%, respectively. But its' efficiencies could be increased by adding carbon sources (BOD(5)). The dye removal efficiency with TWW was increased by 30% and 20% by adding glucose (TWW+glucose) or Thai rice noodle wastewater (TWW+TRNWW), respectively. SRT of the systems were 28+/-1 days and 31+/-2 days with TWW+glucose and TWW+TRNWW, respectively.
随着染料浓度的增加或生物污泥浓度的降低，颗粒活性炭-序批式反应器（GAC-SBR）的效率会降低。在混合液悬浮固体浓度（MLSS）为3000mg/L、水力停留时间（HRT）为7.5天的条件下，该系统对含有40mg/L直接红23或直接蓝201的合成纺织废水（STWW）表现出最高的去除效率。但是，出水的硝酸根离子（NO₃⁻）高于进水。直接红23比直接蓝201对GAC-SBR系统效率的抑制作用更强。随着直接红23浓度从40mg/L增加到160mg/L，含有直接红23的STWW体系对染料的去除效率降低了30%。使用原纺织废水（TWW）的系统对生化需氧量（BOD₅）、总凯氏氮（TKN）和染料的去除效率相当低，分别仅为64.7±4.9%和50.2±6.9%。但其效率可以通过添加碳源（BOD₅）来提高。通过添加葡萄糖（TWW+葡萄糖）或泰国米粉废水（TWW+TRNWW），TWW对染料的去除效率分别提高了30%和20%。使用TWW+葡萄糖和TWW+TRNWW时，系统的污泥龄（SRT）分别为28±1天和31±2天。
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