Biodegradation of high phenol containing synthetic wastewater by an aerobic fixed bed reactor
Biodegradation of high phenol containing synthetic wastewater by an aerobic fixed bed reactor
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DOI：
10.1016/j.biortech.2008.02.057
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发表时间：
2008-11-01
影响因子：
11.4
通讯作者：
Winter, J.
中科院分区：
文献类型：
--
作者：
Bajaj, M.;Gallert, C.;Winter, J.
在固定床生物膜反应器中，使用“Liapor”粘土珠作为填充材料，在25 +/-5 ° C的温度下，研究了与易降解的合成废水混合的苯酚的连续好氧降解超过400天的时间。加入到反应器中的苯酚浓度范围为0.19 - 5.17 g/l，并且通过逐渐增加废水中的苯酚来实现，从而使微生物植物群适应高污染物浓度。在水力停留时间（HRT）为0.95 d，总有机负荷（OLR）为15.3 g COD/（l d），苯酚浓度为4.9 g/l时，最大去除率为2.92 g苯酚/（l d）。然而，在如此高的苯酚负荷下，这不是稳定的速率。在第405天反应器操作结束时，在4.9g/l的流入物苯酚浓度下，苯酚去除速率为2.3g/（l d）。反应器中不存在苯酚中间体，这从相应的COD、苯酚去除和不存在脂肪酸中可以看出。有机氮化合物或尿素在进水饲料的省略是不利于最佳的苯酚去除。在摇瓶中研究的苯酚降解曲线表明，作为苯酚降解中间体的乙酸盐的存在延缓了苯酚的降解。在分批测定中观察到的最高苯酚降解率为3.54 g/（l d）。(c)2008爱思唯尔有限公司版权所有。
The continuous aerobic degradation of phenol, mixed with readily degradable synthetic wastewater was studied over a period of 400 days at 25 +/- 5 degrees C temperature in a fixed bed biofilm reactor using 'Liapor' clay beads as packing material. The phenol concentration added to the reactor ranged from 0.19 to 5.17 g/l and was achieved by a gradual increase of phenol in wastewater, thus adapting the microbial flora to high contaminant concentrations. A maximal removal rate of 2.92 g phenol/(l d) at a hydraulic retention time (HRT) of 0.95 days and a total organic loading rate (OLR) of 15.3 g COD/(l d) with a phenol concentration of 4.9 g/l was observed. However, this was not a stable rate at such high phenol loading, At the end of reactor operation on day 405, the phenol removal rate was 2.3 g/(l d) at a influent phenol concentration of 4.9 g/l. There were no phenol intermediates present in the reactor, as evident from corresponding COD, phenol removal and the absence of fatty acids. Omission of organic nitrogen compounds or of urea in influent feed was not favourable for optimal phenol removal. The phenol degradation profile that was studied in shake flasks indicated that the presence of a acetate which represent as an intermediate of phenol degradation retarded the phenol degradation. The highest phenol degradation rate observed in batch assays was 3.54 g/(l d). (c) 2008 Elsevier Ltd. All rights reserved.