[WATER] Management and Control of Taste and Odour Problems associated with Geosmin and 2-MIB in Drinking Water Supplies

在这个Case学生奖学金博士项目中，我们的目标是了解威塞克斯集水区内饮用水水库中VOC产生量升高（Geosmin和2-MIB）的驱动因素。地臭素和2-MIB的间歇性爆发偶尔（尽管并非总是）与威塞克斯水库中的水生蓝藻水华有关，但最近，底栖生物群落已被确定为VOCs的潜在和重要来源（威塞克斯水，未发表的数据）。我们将以三个水库及其相关集水区为重点，分析这些挥发性有机化合物的分布、迁移和归宿，以及它们对水处理过程的响应。具体目标是：i）从三个水塘的底栖和浮游区分离可能产生挥发性有机化合物的微生物（和直接集水区）; ii）在一系列实验制度下检查土臭素和2-MIB生产的种内和种间变异性; iii）确定VOC溶解和颗粒级分之间的区室化程度; iv）使用分离的底栖和浮游VOCs产生微生物，确定导致VOCs渗出的条件，特别关注病毒裂解、原生动物和甲壳类食草动物的作用。

In this CASE Studentship PhD project we aim to understand the drivers of elevated VOC production (Geosmin and 2-MIB) in drinking water reservoirs within the Wessex Water catchment. Episodic outbreaks of Geosmin and 2-MIB have occasionally, though not always, been associated with planktonic cyanobacterial blooms in Wessex reservoirs, but more recently, benthic communities have been identified as potential and significant sources of the VOCs, (Wessex Water, unpublished data). Focussing on three reservoirs and their associated catchments, we will analyse the distribution, transport and fate of these VOCs and their response to water treatment processes. The specific aims are: i) to isolate potential VOC producing microorganisms from the benthic and pelagic regions of the three reservoirs (and from the immediate catchment); ii) to examine intra-and interspecific variability in Geosmin and 2-MIB production under a range of experimental regimes; iii) to determine the degree of compartmentalisation between dissolved and particulate fractions of VOCs; iv) identify conditions that lead to the exudation of VOCs with a specific focus on the role(s) of viral lysis, protozoan and crustacean grazers, using isolated benthic and pelagic VOC-producing microorganisms.