Bisphenol A(BPA)wastewater is treated by sequencing batch bioreactor(SBR).BPA with influent concentration of 40 mg/L is directly added into one SBR(impact SBR),and the concentration of BPA in the other SBR is increased to 40 mg/L after acclimation with 20 mg/L influent BPA(acclimated SBR).The effects of different BPA wastewater treatment methods on sludge performance are discussed.The results show that the COD concentration of the domesticated SBR effluent is basically maintained at a-bout 50 mg/L,and no BPA residue is detected in the effluent.However,the sludge activity of the impact SBR is significantly inhibited.The effluent COD concentration is as high as 229.6 mg/L,and the effluent BPA concentration is higher than 30 mg/L.However,the effluent COD and BPA concentrations gradually decreases with the extension of operation time.The content of extracellular polymeric substances(EPS)in impact SBR is significantly higher than that in acclimated SBR,but it tended to be consistent with the extension of running time.The removal of pollutants and the change of EPS content in a single SBR cycle confirms that the sludge performance of the impact SBR is basically consistent with that of the acclimated SBR after stable operation.
关键词
双酚A废水/序批式生物反应器/不同处理方式/胞外聚合物
Key words
bisphenol A wastewater/sequencing batch bioreactor/different treatment methods/extra-cellular polymer
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