title: Combination of ozonation, activated carbon, and biological aerated filter for advanced treatment of dyeing wastewater for reuse.
abstract: Laboratorial scale experiments were performed to investigate and evaluate the performance and removal characteristics of organics, color, and genotoxicity by an integrated process including ozonation, activated carbon (AC), and biological aerated filter (BAF) for recycling biotreated dyeing wastewater (BTDW) collected from a cotton textile factory. Influent chemical oxygen demand (COD) in the range of 156 - 252 mg/L, 5-day biochemical oxygen demand (BOD5) of 13.5 - 21.7 mg/L, and color of 58 - 76° were observed during the 20-day continuous operation. Outflows with average COD of 43 mg/L, BOD5 of 6.6 mg/L, and color of 5.6° were obtained after being decontaminated by the hybrid system with ozone dosage of 0.25 mg O3applied/mg COD0, 40 min ozonation contact time, 30 min hydraulic retention time (HRT) for AC treatment, and 2.5 h HRT for BAF treatment. More than 82 % of the genotoxicity of BTDW was eliminated in the ozonation unit. The genotoxicity of the BAF effluent was less than 1.33 μg 4-nitroquinoline-N-oxide/L. Ozonation could change the organics molecular structures, destroy chromophores, increase the biodegradability, and obviously reduce the genotoxicity of BTDW. Results showed that the combined process could guarantee water reuse with high quality.
authors.affiliation: School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, Jiangxi, China, zouxiaoling4623@163.com.
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Zou
mesh_terms: D057919:Biological Oxygen Demand Analysis; D002244:Carbon / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry* / Q000633:toxicity; D005374:Filtration / Q000379:methods; D009152:Mutagenicity Tests; D016877:Oxidants / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D059027:Recycling / Q000379:methods; D013784:Textiles; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000737:chemistry* / Q000633:toxicity; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000633:toxicity
chemical_list: D002244:Carbon; D004396:Coloring Agents; D016877:Oxidants; D010126:Ozone; D062065:Wastewater; D014874:Water Pollutants, Chemical
references.citation: J Hazard Mater. 2010 Mar 15;175(1-3):235-40
references.pmid: 19879043
references.citation: J Environ Manage. 2012 Jul 15;102:79-87
references.pmid: 22446135
references.citation: J Environ Manage. 2009 Jun;90(8):2313-42
references.pmid: 19264388
references.citation: Chemosphere. 2007 Mar;67(4):712-7
references.pmid: 17188325
references.citation: Water Res. 2013 Dec 1;47(19):7143-8
references.pmid: 24210510
references.citation: Environ Technol. 2015 Jan-Feb;36(1-4):336-47
references.pmid: 25514135
references.citation: J Hazard Mater. 2010 Feb 15;174(1-3):694-9
references.pmid: 19853375
references.citation: J Hazard Mater. 2014 May 30;273:127-35
references.pmid: 24727015
references.citation: Ecotoxicol Environ Saf. 2011 Nov;74(8):2275-83
references.pmid: 21840051
references.citation: J Hazard Mater. 2009 Apr 15;163(1):115-20
references.pmid: 18667273
references.citation: Environ Technol. 2014 Mar-Apr;35(5-8):956-65
references.pmid: 24645479
references.citation: Chemosphere. 2014 Jul;107:240-8
references.pmid: 24418068
references.citation: Bioresour Technol. 2013 Jan;128:827-30
references.pmid: 23199816
references.citation: Environ Sci Technol. 2010 Jul 1;44(13):4924-9
references.pmid: 20521844
references.citation: Bioresour Technol. 2013 Apr;133:150-7
references.pmid: 23422307