紫外光/生物膜耦合降解苯酚与2,4,6-三氯酚

氯酚是一种较难生物降解的有机化合物且又广泛存在于自然环境中,传统的生物方法不能有效地使其得到降解,同时氯酚的存在还会对苯酚的降解产生一定的抑制作用.为此本研究采用一种一体式的内循环光/生物降解反应器,借助生物膜与波长为254 nm的紫外辐射的协同作用对含有苯酚和2,4,6-三氯酚(2,4,6-TCP)混合溶液进行降解.实验中分别比较了单独紫外辐射(P)、单独生物降解(B)以及紫外辐射与生物降解(P+B)共同作用下苯酚与2,4,6-TCP的降解规律,重点讨论了2,4,6-TCP对苯酚降解速率的影响.实验结果表明:2,4,6-TCP的存在对苯酚的降解有抑制作用,而采用P+B方法时,该抑制作用可以得到有效地缓解,苯酚对2,4,6-TCP降解速率的影响不大,采用紫外光辐射与生物膜耦合的方法对混合溶液进行降解时,混合溶液中苯酚和2,4,6-TCP的降解速率最快,相应的COD平均去除率也最高.

Degradation of phenol and 2,4,6-trichlorophenol by biofilm coupled UV irradiation

Chlorophenol is one of recalcitrant compounds,and existed in natural environment.Conventional biological is powerless for chlorophenol to be degraded effectively,and biodegradation of phenol could be also inhibited due to its existence at the same time.Therefore,an internal loop photo-biodegradation reactor(ILPBR) was accepted for degradation of the mix solution of phenol and 2,4,6-trichlorophenol(2,4,6-TCP) by means of biofilm coupled UV irradiation with 254nm wavelength.Regularity of phenol and 2,4,6-TCP ...