Brenner Asher, Mukmenev Igor, Abeliovich Aharon, Kushmaro Ariel
Biotechnology & Environmental Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
Ecotoxicology. 2006 May;15(4):399-402. doi: 10.1007/s10646-006-0072-6. Epub 2006 May 16.
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.
基于传统（好氧）活性污泥法和接触（厌氧）法的实验室反应器系统运行了近一年，目的是开发一种生物工艺来降解阻燃剂四溴双酚A（TBBPA），并探究其降解是否会导致内分泌干扰物双酚A（BPA）的形成。向反应器中投喂含有三溴苯酚（TBP）的TBBPA废物混合物，并添加可能含有接触过这些化合物的本土细菌的受污染沉积物。使用各种有机化合物作为潜在的电子供体，以促进卤呼吸细菌的生长，这些细菌会使TBBPA脱溴，使其可用于进一步的好氧矿化。尽管采用了各种运行策略并添加了不同的碳源，但未观察到TBBPA的生物降解，且在任何好氧或厌氧反应器中均未检测到BPA等中间体的积累。另一方面，发现TBP很容易被模拟活性污泥法的好氧培养物生物降解。这与TBP分解后释放到液体中的溴化物持续积累有关。
