Biofiltration kinetics of ethylacetate and xylene using sugarcane bagasse based biofilter

Chemical Engineering Research Bulletin Pub Date : 2010-05-28 DOI:10.3329/CERB.V14I1.4683

S. Viswanathan, R. Manivasagam, R. Natarajan

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引用次数: 11

Abstract

Biodegradation kinetic behaviors of ethyl acetate and xylene in a sugarcane bagasse biofilter were investigated. Microbial growth rate, biochemical reaction rate and kinetic analysis were inhibited at higher inlet concentration. For the microbial growth process, the microbial growth rate of ethyl acetate was greater than that of xylene in the inlet concentration range of 0.2 - 1.2 g.m- 3 . The degree of inhibitive effect was almost the same for ethyl acetate and xylene in this concentration range. The half-saturation constant Ks values of ethyl acetate and xylene were 1.8489 and 1.784 g.m -3 , respectively. The maximum reaction rate V m values of ethyl acetate and xylene were 0.8073and 0.8438 g C h -1 kg -1 packed material, respectively at a concentration of 0.2 g.m -3 . For the biochemical reaction process, the biochemical reaction rate of ethyl acetate was greater than that of xylene in the inlet concentration range of 0.2 - 1.2 g.m -3 . The inhibitive effect for ethyl acetate was more pronounced than that for 0.2 - 1.2 g.m -3 in this concentration range. The EAX concentration profiles along the depth were also determined by using diffusion reaction model. It was observed that at low concentration and low flow rate, the model is in good agreement with the experimental values for ethylacetate and xylene. Keywords: Xylene, ethyl acetate, sugarcane bagasse, biofilter, biochemical reaction DOI = 10.3329/cerb.v14i1.4683 Chemical Engineering Research Bulletin 14 (2010) 51-57

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蔗渣基生物滤池对乙酸乙酯和二甲苯的生物过滤动力学

研究了蔗渣生物滤池中乙酸乙酯和二甲苯的生物降解动力学行为。较高的进口浓度抑制了微生物生长速率、生化反应速率和动力学分析。在微生物生长过程中，在入口浓度0.2 ~ 1.2 g m- 3范围内，乙酸乙酯的微生物生长速率大于二甲苯。在此浓度范围内，对乙酸乙酯和二甲苯的抑制程度基本相同。乙酸乙酯和二甲苯的半饱和常数k值分别为1.8489和1.784 g m -3。在浓度为0.2 g m -3时，乙酸乙酯和二甲苯的最大反应速率V m值分别为0.8073和0.8438 g C h -1 kg -1填料。在生化反应过程中，在入口浓度0.2 ~ 1.2 g m -3范围内，乙酸乙酯的生化反应速率大于二甲苯的生化反应速率。在此浓度范围内，对乙酸乙酯的抑制作用比0.2 ~ 1.2 g m -3的抑制作用更明显。采用扩散反应模型测定了EAX浓度沿深度的分布。结果表明，在低浓度、低流速条件下，模型与乙酸乙酯和二甲苯的实验值吻合较好。关键词:二甲苯，乙酸乙酯，甘蔗渣，生物过滤器，生化反应DOI = 10.3329/cerb.v14i1.4683化学工程研究通报14 (2010)51-57

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Chemical Engineering Research Bulletin

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