title: [Treatment of high-concentration butyl-acrylate-production wastewater by A three-phase biological fluidized bed reactor].
abstract: The butyl-acrylate-production wastewater was treated by a three-phase biological fluidized bed reactor. The influences of acrylic acid concentrations, p-toluenesulfonic acid concentrations, volumic load and hydraulic retention time on pollutants removal efficiencies were investigated. It was indicated that the reactor was suitable for the treatment of butyl-acrylate-production wastewater at a high loading rate. Acrylic acid of 100 mg/L or p-toluenesulfonic acid of 50 mg/L in the influent can inhibit the unacclimated microorganisms in the fluidized bed reactor. The inhibition effects were eliminated after an acclimation of two weeks. Acrylic acid and p-toluenesulfonic acid could be removed completely at COD loading rates up to 11.56-13.56 kg/(m3 x d). The effluent COD could satisfy the demand of Class II in Chinese Integrated Wastewater Discharge Standard (GB 8978-1996) at COD loading rates up to 8.86 kg/(m3 x d) when influent COD concentration is below 2000 mg/L. When the influent COD concentration was increased to 9550-11,800 mg/L(acrylic acid of 6244 mg/L and p-toluenesulfonic acid of 1000 mg/L), the effluent COD was 271-360 mg/L, which satisfied the demand of Class III in Chinese Integrated Wastewater Discharge Standard (GB 8978-1996) at COD loading rates of 7.96-9.83 kg/(m3 x d).
authors.affiliation: Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. fanzhiqing1985@163.com
authors.forename: Zhi-qing
authors.initials: ZQ
authors.lastname: Fan
authors.forename: Yu-dong
authors.initials: YD
authors.lastname: Song
authors.forename: Yue-xi
authors.initials: YX
authors.lastname: Zhou
authors.forename: Han-dong
authors.initials: HD
authors.lastname: Liang
mesh_terms: D000179:Acrylates / Q000302:isolation & purification*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000179:Acrylates; D014874:Water Pollutants, Chemical; C032490:n-butyl acrylate