Biodegradability of terephthalic acid in terylene artificial silk printing and dyeing wastewater.
As the characteristic pollutant, terephthalic acid (TA) was in charge of 40%-78% of the total COD of terylene artificial silk printing and dyeing wastewater (TPW-water). The studies on biodegradability of TA were conducted in a serial of activated sludge reactors with TPW-water. TA appeared to be readily biodegradable with removal efficiency over 96.5% under aerobic conditions, hardly biodegradable with removal efficiency below 10% under anoxic conditions and slowly biodegradable with a turnover between 31.4% and 56.0% under anaerobic conditions. TA also accounted for the majority of BOD in TPW-water. The process combined by anoxic, anaerobic and aerobic activated sludge reactor was suitable for TA degradation and TPW-water treatment, Further, the aerobic process was essentially much more effective than the anaerobic or anoxic one to degrade TA in TPW-water.
Guan
Bao-Hong
BH
Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China. guanbaohong@sina.com
Wu
Zhong-Biao
ZB
Wu
Zu-Ceng
ZC
Xu
Gen-Liang
GL
Tan
Tian-En
TE
D001420:Bacteria, Aerobic; D001421:Bacteria, Anaerobic; D001673:Biodegradation, Environmental; D019149:Bioreactors; D004396:Coloring Agents; D016166:Free Radical Scavengers / Q000378:metabolism*; D007220:Industrial Waste; D010795:Phthalic Acids / Q000378:metabolism*; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014876:Water Pollution / Q000517:prevention & control*
D004396:Coloring Agents; D016166:Free Radical Scavengers; D007220:Industrial Waste; D010795:Phthalic Acids; C011363:terephthalic acid