Investigating the performance of inverse fluidized bed biofilm reactor for phenol biodegradation using Pseudomonas fluorescence

S. Begum, K. Radha
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引用次数: 2

Abstract

The feasibility of a three phase inverse fluidized bed biofilm reactor with low density support particles (812 kg/m3) was investigated for the degradation of synthetic phenolic effluent (600 mg/l at 30°C) using indigenous pure culture of Pseudomonas fluorescence. The maximum COD removal of 97.9% occurred with complete degradation of phenol in 110 hours of operation and the biofilm and biomass characteristics of Pseudomonas fluorescence with respect to its suspended and attached biomass concentration, biofilm thickness and bioparticle density were also studied. The culture followed substrate inhibition kinetics. Biodegradation data was correlated with kinetic models including Monod, Yano& Koga, Teissier, Aiba et al, Webb and Haldane model. Experimentally obtained data best fitted with the Haldane model and the kinetic parameters were derived by non linear regression with a correlation factor (R2) of 0.9938. The values of Haldane constants rsmax, Ks and Ki were 0.541 h-1, 0.9211 mg/l and 3.57 mg/l respectively. The bio-kinetic constants estimated using these models showed good potential of using Pseudomonas fluorescence culture in phenol degradation in inverse fluidized bed biofilm reactor.
利用荧光假单胞菌研究反流化床生物膜反应器降解苯酚的性能
研究了低密度载体颗粒(812 kg/m3)三相反流化床生物膜反应器在30°C条件下降解600 mg/l合成酚废水的可行性。运行110 h,苯酚完全降解,COD去除率达到97.9%,并研究了荧光假单胞菌的生物膜和生物量特性,包括悬浮和附着的生物量浓度、生物膜厚度和生物颗粒密度。培养遵循底物抑制动力学。生物降解数据与动力学模型相关,包括Monod, Yano& Koga, Teissier, Aiba等,Webb和Haldane模型。实验得到的数据最符合Haldane模型,并通过非线性回归得到动力学参数,相关系数(R2)为0.9938。霍尔丹常数rsmax为0.541 h-1, Ks为0.9211 mg/l, Ki为3.57 mg/l。利用这些模型估计的生物动力学常数表明,荧光假单胞菌在反流化床生物膜反应器中降解苯酚具有良好的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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