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Biodegradation studies of selected priority acidic pesticides and diclofenac in different bioreactors

机译：精选优先酸性农药和双氯芬酸在不同生物反应器中的生物降解研究

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The biodegradation of selected priority acidic pesticides MCPP, MCPA, 2,4-D, 2,4-DP and bentazone and the acidic pharmaceutical diclofenac was investigated using a membrane bioreactor (MBR) and a fixed-bed bioreactor (FBBR). A pilot plant MBR was fed with raw water spiked with the selected compounds. The experiment was repeated every week during four weeks to enhance the adaptation of microorganisms. In order to further study the biodegradability of these compounds, degradation studies in a FBBR were carried out. All the samples were analysed by solid phase extraction-gas chromatography-mass spectrometry (SPE-GC-MS). The results indicate that in the MBR compounds except for bentazone were eliminated within the first day of the experiment at rates ranging from 44% to 85%. Comparing these results with the degradation rates in the FBBR showed that in the latter only MCPP, MCPA 2,4-D and 2,4-DP were degraded after a much longer adaptation phase of microorganisms. (c) 2006 Elsevier Ltd. All rights reserved.
机译：使用膜生物反应器（MBR）和固定床生物反应器（FBBR）研究了选定的优先酸性农药MCPP，MCPA，2,4-D，2,4-DP和苯达松和酸性药物双氯芬酸的生物降解。向中试工厂MBR注入掺有所选化合物的原水。为了增强微生物的适应性，每周在四个星期内重复进行该实验。为了进一步研究这些化合物的生物降解性，在FBBR中进行了降解研究。通过固相萃取-气相色谱-质谱（SPE-GC-MS）分析所有样品。结果表明在MBR化合物中，除苯达松外，在实验的第一天就以44％至85％的比率消除了。将这些结果与FBBR中的降解率进行比较表明，在后者中，只有MCPP，MCPA 2,4-D和2,4-DP在更长的微生物适应期后才被降解。 （c）2006 Elsevier Ltd.保留所有权利。

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