An integrated approach to iron salt use in urban water systems

该项目旨在制定和展示一项综合创新战略以及相关的科学和技术，以便在城市供水系统中实现铁盐的多种有益利用。本项目拟采用氯化铁代替明矾作为水处理中最常用的混凝剂。然后，同样的铁进一步用于下水道中的腐蚀和气味控制，废水处理反应器中的磷去除以及厌氧消化器中沼气中的硫化氢去除。预计该战略将大大减少整个城市供水系统中化学品的使用，为城市供水设施带来巨大的经济和环境效益。

The project aims to develop and demonstrate an integrated and innovative strategy, and the associated science and technologies, to achieve multiple beneficial uses of iron salts in an urban water system. The project intends to use iron chloride to replace the most commonly used alum as a coagulant in water treatment. The same iron is then further used for corrosion and odour control in sewers, phosphorus removal in wastewater treatment reactors and hydrogen sulfide removal from biogas in an anaerobic digester. The strategy is expected to substantially reduce the use of chemicals in the entire urban water system, delivering large economic and environmental benefits to urban water utilities.