Combination of Fenton oxidation and sequencing batch membrane bioreactor for treatment of dry-spun acrylic fiber wastewater

被引:17
|
作者
Wei, Jian [1 ,2 ,3 ]
Song, Yonghui [1 ,2 ]
Meng, Xiaoguang [1 ,2 ,4 ]
Pic, Jean-Stephane [3 ]
机构
[1] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
[2] Chinese Res Inst Environm Sci, Sci & Technol Innovat Base Urban Water Environm R, Beijing 100012, Peoples R China
[3] Univ Toulouse, LISBP, INSA, F-31077 Toulouse, France
[4] Stevens Inst Technol, Ctr Environm Engn, Hoboken, NJ 07030 USA
关键词
Acrylic fiber wastewater; Fenton; Membrane bioreactor; Denitrification; Membrane fouling; LANDFILL LEACHATE; REMOVAL; DEGRADATION; OPERATION; NITROGEN;
D O I
10.1007/s12665-015-4091-6
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Dry-spun acrylic fiber (DAF) is typically synthesized by the polymerization of acrylonitrile (AN) monomers under high-temperature conditions. DAF manufacturing factories produce DAF polymerization and AN manufacturing wastewaters that are complex, toxic and bio-refractory. In this study, a bench-scale combined Fenton-sequencing batch membrane bioreactor (SBMBR) process was developed for DAF wastewater treatment. Fenton oxidation was used for the pretreatment of DAF polymerization wastewater, with which the COD removal efficiency exceeded 47.0 % under the optimum conditions of H2O2 90.0 mM, Fe2+ 20.0 mM, pH value 3.0, and reaction time 120 min. The pretreatment increased the BOD5/COD ratio of DAF polymerization wastewater from 0.35 to 0.69 and observably decreased the toxicity (assessed with the Vibrio fisheri bacteria light loss) from 92.0 to 32.0 %. As for the biological treatment, the mixture liquor of Fenton effluent and AN manufacturing wastewater was fed to a bench-scale SBMBR system. Under the designed operation conditions, the average COD, NH4+-N and TN removal efficiencies reached 82.5, 98.4 and 74.6 %, respectively. The final effluent of SBMBR could steadily meet the National Discharge Standard of China of Grade I (GB8978-1996). The polyvinylidene fluoride flat-plate membranes used in this study showed excellent anti-fouling performance throughout the operation period.
引用
收藏
页码:4911 / 4921
页数:11
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