Biodegradability of tetrabromobisphenol A and tribromophenol by activated sludge
Biodegradability of tetrabromobisphenol A and tribromophenol by activated sludge
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DOI：
10.1007/s10646-006-0072-6
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发表时间：
2006-05-01
期刊：
影响因子：
2.7
通讯作者：
Kushmaro, Ariel
中科院分区：
文献类型：
--
作者：
Brenner, Asher;Mukmenev, Igor;Kushmaro, Ariel
实验室反应器系统的基础上，传统的（好氧）活性污泥法和接触（厌氧）的过程中运行了近一年，以开发一种生物降解的阻燃剂四溴双酚A（TBBPA），并找出它的降解可能导致内分泌干扰物双酚A（BPA）的形成。向反应器中加入还含有三溴苯酚（TBP）的TBBPA废物混合物，并加入可能含有暴露于这些化合物的土著细菌的污染沉积物。各种有机化合物被用来作为潜在的电子供体，以提高halorespiring细菌的生长，将脱溴TBBPA，并使其可用于进一步的有氧矿化。尽管应用了各种操作策略并添加了不同的碳源，但没有观察到TBBPA生物降解，也没有检测到任何好氧或厌氧反应器中的中间产物如BPA的积累。TBP在另一方面，被发现很容易被好氧培养物模拟活性污泥法生物降解。这与TBP分解后释放到液体中的溴化物的持续积累有关。
Laboratory reactor systems based on the conventional (aerobic) activated sludge process and on the contact (anaerobic) process were operated almost one year in order to develop a biological process for the degradation of the fire retardant tetrabromobisphenol A (TBBPA) and to find out if its degradation might result in the formation of the endocrine disruptor bisphenol A (BPA). The reactors were fed a TBBPA waste mixture containing also tribromophenol (TBP), and added with contaminated sediments that might have contained indigenous bacteria exposed to these compounds. Various organic compounds were used as potential electron donors to enhance growth of halorespiring bacteria that would debrominate the TBBPA and make it available for further aerobic mineralization. In spite of the various operating strategies applied and the different carbon sources added, no TBBPA biodegradation has been observed and no accumulation of intermediates such as BPA in any of the aerobic or anaerobic reactors has been detected. TBP on the other hand, was found to be easily biodegraded by aerobic cultures simulating the activated sludge process. This was linked to consistent accumulation of bromides, released to the liquid following TBP breakdown.