英语翻译Fig.1 presents the removal efficiency and recovery time as a function of the preceding contaminant starvation period.The results show that when BTF was subjected to contaminant starvation for periods of 4,8,12,and 16 h,after reestablishme

英语翻译Fig.1 presents the removal efficiency and recovery time as a function of the preceding contaminant starvation period.The results show that when BTF was subjected to contaminant starvation for periods of 4,8,12,and 16 h,after reestablishme
英语翻译
Fig.1 presents the removal efficiency and recovery time as a function of the preceding contaminant starvation period.The results show that when BTF was subjected to contaminant starvation for periods of 4,8,12,and 16 h,after reestablishment of the contaminant in the inlet gas
stream,removal efficiency dropped from 100 to 97%,96,94,and 92%,respectively.However,after a period of 1.5 2 h,in all cases the removal efficiency climbed back to 100%.This means that the BTF used in the present study can reasonably withstand short starvation periods - such as
would occur during equipment failure,and shift work.In order to shed further light on the effect of short term starvation on the activity of the immobilized bacterial biomass in the BTF,the corresponding SOUR values of samples of immobilized biomass at the end of the starvation period was measured.The results (Fig.2) showed that there is a significant reduction in the SOUR value of immobilized biomass after 4 h of contaminant starvation,whereas further increase in the period of contaminant starvation of up to 16 h had a much smaller or no effect.The initial reduction in the aerobic activity of the immobilized biomass is related to the shift from active
metabolism to maintenance state [3].The results suggestthat T.thioparuscells are able to maintain themselveswithout a supply of H2S as an energy source for up to 16h and fairly quickly shift back to active metabolism whenH2S is resupplied to them.One reason for this phenomenon
can be the use of elemental sulfur produced in the biofiltration process [6,13].The observation of yellow deposits inside the BTF confirmed the production of sulfur during the experiments,although no data is available to confirm the usage of this sulfur during the starvation period.In the study by Cox and Deshusses [3],when BTF was subjected to contaminant starvation the removal performance of toluene also dropped but the decrease was lower than that observed in the present study.This is probably partly related to the use of heterotrophic microorganisms in that
study,since these types of microorganisms can utilize the products of lyses and death of other microbes as an energy source enabling them to tolerate starvation periods more easily.Another factor is the higher immobilized biofilm thickness observed in BTFs treating VOCs compared to
those treating volatile inorganic compounds such as H2S (23 µm in H2S elimination compared to at least 60 80 µm in VOC elimination) [16,25,26].This means that in the former,under certain conditions,a short-term starvation regime might actually be beneficial,as it would lead to the death of part of the microbial population and reduce

英语翻译Fig.1 presents the removal efficiency and recovery time as a function of the preceding contaminant starvation period.The results show that when BTF was subjected to contaminant starvation for periods of 4,8,12,and 16 h,after reestablishme
图 1 展示了去除效率和作为函数的前面的污染物饥饿时期的恢复时间.结果显示,当 BTF 遭受了污染物饥饿时期的 4、 8、 12、 和 16 h 后在入口的气体污染物的重建
流,从 100 分别降至 97%、 96、 94,92%的去除效率.然而后一段时间的 1.5,2 h,在所有情况下的去除效率爬回 100%.这意味着在本研究中使用的 BTF 可以合理地承受短期饥饿期间 — — 如
会在设备出现故障,期间发生和转移工作.为了进一步阐明固定化细菌生物量 BTF 短期饥饿对活动的影响,测量了样品在结束了饥饿时期的固定化生物量相应的酸值.(图 2) 结果显示是有大幅度降低酸值的固定化生物物质后 4 h 的污染物的饥饿,而进一步增加污染物有饿死的达 16 h 期间有更小或没有影响.固定化生物物质有氧活动减少,最初是从活动涉及到转变
代谢维护状态 [3].结果无耻 T.thioparuscells 得以保持 themselveswithout 供应的 H2S 作为达 16 h 的能量来源,很快转移到活性代谢 whenH2S 补给给他们.这种现象的原因之一
可以使用单质硫生产的生物过滤处理 [6,13].黄色存款里面 BTF 的观察证实生产硫的实验,期间虽然没有数据是可用在饥饿期间确认此硫的使用.该项研究由 Cox 和德叙斯 [3],当 BTF 受到污染物饥饿时去除特性的甲苯也下降,但减少,是低于在本研究中观察到.这大概部分有关中的异养微生物的使用
研究中,由于这些类型的微生物可以利用的裂解产品和其他微生物作为能源的来源,使他们能够更轻松地忍受饥饿期间死亡.另一个因素是 BTFs 处理挥发性有机化合物技术相比中观察到的更高固定化生物膜厚度
那些治疗 H2S 等挥发性无机化合物 (23 µ m 中 H2S 消除相比至少 60 80 微米 VOC 消除) [16,25,26].这意味着在前,在某些情况下,短期的饥饿政权实际上可能有益,因为它将导致死亡的微生物人口的一部分,减少