Advancing energy recovery from source-diverted municipal wastewater: shaping microbial community through direct interspecies electron transfer**

加拿大的大部分供水服务基础设施需要更换，因为这种集中式基础设施已达到其设计寿命。改善经济、环境和社会目标的未来水服务选择包括将黑水(厕所和厨房食品流)与剩余的家庭灰水分开收集和处理。拟议研究的总体目标是开发一个坚固的生物反应器系统，该系统具有高生物甲烷产量和低环境风险，适用于来源分流的黑水能源回收，适合加拿大寒冷的条件。这项研究将专注于设计一种最近发现的甲烷产生的代谢途径，即物种间直接电子转移(饮食)。预计拟议的研究将为开发大幅度降低生命周期成本和环境健康风险的技术提供基础知识，并促进城市水的可持续发展。

Much of Canada's water service infrastructure is in need of replacement as this centralized infrastructure has reached its design life. Future water service options that improve upon economic, environmental and societal goals include separate collection and treatment of blackwater (toilet and kitchen food streams) from the remaining household grey water. The overall goal of the proposed research is to develop a robust bioreactor system with high biomethane production and low environmental risks for source-diverted blackwater energy recovery that suits the cold Canadian conditions. This research will focus on engineering a recently discovered metabolic pathway for methane production, known as direct interspecies electron transfer (DIET). The proposed research is expected to provide fundamental knowledge for developing technology with dramatic life-cycle cost and environmental health risk reductions and to facilitate sustainable urban water development.