Styrene vapor biodegradation in single- and two-liquid phase biotrickling filters using Ralstonia eutropha
Styrene vapor biodegradation in single- and two-liquid phase biotrickling filters using Ralstonia eutropha
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DOI：
10.1016/j.cej.2015.01.040
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发表时间：
2015-05
影响因子：
15.1
通讯作者：
Seyed Morteza Zamir;Saeme Babatabar;S. Shojaosadati
中科院分区：
文献类型：
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作者：
Seyed Morteza Zamir;Saeme Babatabar;S. Shojaosadati
本研究考察了在硅油（5% v/v）的存在和不存在的情况下，利用细菌培养的富营养化生物滴滤（BTFs）去除苯乙烯蒸气。在40°C下，使用苯乙烯进口浓度为0.8-3.3 g m - 3，空床停留时间（EBRTs）为1和2 min，进行去除。对于单相BTF，在进口浓度<2.5 g m−3和EBRT为1 min时，去除效率（RE）达到95%。在所有操作条件下，向循环溶液中加入油都增强了苯乙烯的消除，并将最大消除能力（ECmax）从70 g m−3h−1提高到110 g m−3h−1。从流化床分离的微生物元素分析和生物降解方程的结果表明，单相流化床的co2生成量与苯乙烯消耗量之比为2.60，两相流化床的co2生成量与苯乙烯消耗量之比为4.85。在35°C和40°C条件下的结果比较表明，油的存在降低了操作温度对RE的影响。
This study examined the use of a bacterial culture ofRalstonia eutrophain biotrickling filters (BTFs) for styrene vapor removal in the absence and presence of silicone oil (5% v/v). Removal was carried out at 40 °C using styrene inlet concentrations of 0.8–3.3 g m−3and empty bed residence times (EBRTs) of 1 and 2 min. For single-phase BTF, a removal efficiency (RE) of 95% was achieved at inlet concentrations of <2.5 g m−3and at an EBRT of 1 min. The addition of oil to the recirculating solution enhanced styrene elimination under all operating conditions and increased maximum elimination capacity (ECmax) from 70 to 110 g m−3h−1. Results of elemental analysis of microorganisms isolated from the bed of the BTFs and biodegradation equations showed that the ratios of CO2generation to styrene consumption were 2.60 for single-phase and 4.85 for two-phase BTFs. A comparison of results at 35 °C and 40 °C showed that the presence of oil decreased the effect of operating temperature on RE.