The removal of 1,4-dioxane from polyester manufacturing process wastewater using an up-flow Biological Aerated Filter (UBAF) packed with tire chips.
1,4-Dioxane is one of the by-products from the polyester manufacturing process, which has been carelessly discharged into water bodies and is a weak human carcinogen. In this study, a laboratory-scale, up-flow biological aerated filter (UBAF), packed with tire chips, was investigated for the treatment of 1,4-dioxane. The UBAF was fed with effluent, containing an average of 31 mg/L of 1,4-dioxane, discharged from an anaerobic treatment unit at H Co. in the Gumi Industrial Complex, South Korea. In the batch, a maximum of 99.5 % 1,4-dioxane was removed from an influent containing 25.6 mg/L. In the continuous mode, the optimal empty bed contact time (EBCT) and air to liquid flow rate (A:L) were 8.5 hours and 30:1, respectively. It was also found that the removal efficiency of 1,4-dioxane increased with increasing loading rate within the range 0.04 to 0.31 kg 1,4-dioxane/m(3)·day. However, as the COD:1,4-dioxane ratio was increased within the range 3 to 46 (mg/L COD)/(mg/L 1,4-dioxane), the removal efficiency unexpectedly decreased.
Department of the Environment Engineering, Inha University, Namgu, Incheon, Korea.
Thi-Hiep
TH
Han
Ji-Sun
JS
Han
Myung-Ho
MH
So
Jang-Won
JW
Seo
Chang-Min
CM
Ahn
Dong Hee
DH
Min
Yeon Sun
YS
Yoo
Daniel K
DK
Cha
Chang Gyun
CG
Kim
D000332:Aerobiosis; D001420:Bacteria, Aerobic / Q000145:classification / Q000235:genetics / Q000378:metabolism*; D018441:Biofilms / Q000145:classification; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D004146:Dioxanes / Q000378:metabolism*; D005374:Filtration; D007220:Industrial Waste; D008855:Microscopy, Electron, Scanning; D010100:Oxygen / Q000032:analysis; D011091:Polyesters; D012722:Sewage / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D004146:Dioxanes; D007220:Industrial Waste; D011091:Polyesters; D012722:Sewage; D014874:Water Pollutants, Chemical; C025223:1,4-dioxane; D010100:Oxygen