污水中所含的碳、氮、磷，都是宝贵的"有用资源"，但传统的城市污水处理与再生工艺却将这些物质视为污染物，通过投入大量的能耗和物耗予以去除以获取再生水。本项目提出以城市污水中蕴藏的资源的最大化利用和水再生利用为目标，基于电化学、生物电化学、膜分离的原理，将污水中的碳物质定向转化为电能，以此驱动氮磷定向转移回收及电化学耦合臭氧氧化强化对微量有机物等的去除，以达到资源回收和污水再生回用深度处理的目的。通过研究各单元技术的构建原理，解析耦合各单元的全系统中物质流和能量流，评估污水自持的化学能用于资源回收和水再生利用的可行性。项目旨在为构建新型城市污水自持能量驱动资源回收和水再生利用工艺提供理论依据和技术基础。本研究对于实现城市污水再生回用深度处理过程中的节能减排和资源回收具有重要的前瞻性和战略意义。

Traditional processes for wastewater treatment and reclamation consume a large quantity of energy and material to remove pollutants and thus produce reclaimed water. However, carbon, nitrogen and phosphorous, which are considered as 'pollutants' in those traditional processes, are actually valuable resources which can be recovered. The present project proposes a novel process for wastewater treatment and reuse, which is targeted at simultaneously achieving upmost recovery of resources stored in wastewater and reclamation of water. Based on the principles of electrochemistry, bio-electrochemistry and membrane separation, carbon in wastewater is specifically converted to electricity, which can be utilized to drive the recovery of nitrogen and phosphorous by the oriented transferring under electric field, and the removal of micro-organic pollutants by electrochemical technologies coupled with ozonation. Consequently the resources (carbon, nitrogen and phosphorous) are recovered and clean and safe reclaimed water is produced. Three components (carbon conversion, nitrogen and phosphorous recovery and micro-organic pollutants removal) will be investigated, and the feasibility to recovery resources and reclaim water by the energy produced from carbon is evaluated by elucidating the energy flow and material flow in the coupling process. This project aims at building theoretical and technological foundation for the new process to simultaneously recover resources and reclaim water by utilizing the energy of wastewater itself. This study is of great importance to realizing energy saving, emission reduction and resource recovery during municipal wastewater treatment and reclamation.