Abstract: Chemical phosphorus removal is an effective approach to controlling eutrophication and recycling phosphorous resource from waste water. The mechanisms of three major phosphorus removal reagents，such as ferric salt，aluminum salt and lime，were presented，and the influence factors of these three reagents，including pH，dosage，optimal dosing points and economic analysis，were also discussed. The processes of pre-chemical-aid，synergic-chemical-aid，post-chemical-aid and bypass-chemical-aid phosphorus removal technologies were summarized. The adsorption and crystallization phosphorus removal new process was introduced，and the prospect of recycling phosphorous resource as the development orientation of phosphate removal process in the future was presented.

Key words: chemical phosphorus removal, phosphorus removal reagents；chemical-aid biological phosphorus removal；influence factor

摘要： 化学除磷是抑制水体富营养化以及从废水中回收磷资源的有效手段。本文阐述了铁盐、铝盐和石灰3种常见化学除磷药剂的除磷机理及其影响因素，如pH值、投加量、投药点以及经济性分析；概述了前置化学辅助除磷、协同化学辅助除磷、后置化学辅助除磷以及旁路化学辅助除磷4种化学辅助生物除磷工艺的特点，最后介绍了吸附法和结晶法除磷新兴工艺，阐明了磷资源回收是未来化学除磷工艺的方向发展。

关键词: 化学除磷, 除磷药剂, 化学辅助生物除磷, 影响因素