title: Application of integrated ozone biological aerated filters and membrane filtration in water reuse of textile effluents.
abstract: A combined process including integrated ozone-BAFs (ozone biological aerated filters) and membrane filtration was first applied for recycling textile effluents in a cotton textile mill with capacity of 5000 m(3)/d. Influent COD (chemical oxygen demand) in the range of 82-120 mg/L, BOD5 (5-day biochemical oxygen demand) of 12.6-23.1 mg/L, suspended solids (SSs) of 38-52 mg/L and color of 32-64° were observed during operation. Outflows with COD≤45 mg/L, BOD5≤7.6 mg/L, SS≤15 mg/L, color≤8° were obtained after being decontaminated by ozone-BAF with ozone dosage of 20-25 mg/L. Besides, the average removal rates of PVA (polyvinyl alcohol) and UV254 were 100% and 73.4% respectively. Permeate water produced by RO (reverse osmosis) could be reused in dyeing and finishing processes, while the RO concentrates could be discharged directly under local regulations with COD≤100 mg/L, BOD5≤21 mg/L, SS≤52 mg/L, color≤32°. Results showed that the combined process could guarantee water reuse with high quality, and solve the problem of RO concentrate disposal.
authors: College of Environment And Energy, South China University of Technology, Guangzhou 510006, China.
authors: Yaozhong
authors: Y
authors: He
authors: Xiaojun
authors: X
authors: Wang
authors: Jinling
authors: J
authors: Xu
authors: Jinli
authors: J
authors: Yan
authors: Qilong
authors: Q
authors: Ge
authors: Xiaoyang
authors: X
authors: Gu
authors: Lei
authors: L
authors: Jian
mesh_terms: D000332:Aerobiosis / Q000187:drug effects; D001673:Biodegradation, Environmental / Q000187:drug effects; D057919:Biological Oxygen Demand Analysis; D003365:Costs and Cost Analysis; D005374:Filtration / Q000191:economics / Q000295:instrumentation* / Q000379:methods*; D008567:Membranes, Artificial; D009995:Osmosis / Q000187:drug effects; D010126:Ozone / Q000494:pharmacology*; D059027:Recycling; D013784:Textiles; D062065:Wastewater / Q000191:economics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D060753:Water Quality
chemical_list: D008567:Membranes, Artificial; D010126:Ozone; D062065:Wastewater; D014874:Water Pollutants, Chemical