The recovery of ammonia-nitrogen during wastewater treatment and water purification is increasingly critical in energy and economic development. The concentration of ammonia-nitrogen in wastewater is different depending on the type of wastewater, making it challenging to select ammonia-nitrogen recovery technology. Meanwhile, the conventional nitrogen removal method wastes ammonia-nitrogen resources. Based on the circular economy, this review comprehensively introduces the characteristics of several main ammonia-nitrogen source wastewater plants and their respective challenges in treatment, including municipal wastewater, industrial wastewater, livestock and poultry wastewater and landfill leachate. Furthermore, we introduce the main methods currently adopted in the ammonia-nitrogen removal process of wastewater from physical (air stripping, ion exchange and adsorption, membrane and capacitive deionization), chemical (chlorination, struvite precipitation, electrochemical oxidation and photocatalysis) and biological (classical and typical activated sludge, novel methods based on activated sludge, microalgae and photosynthetic bacteria) classification based on the ammonia recovery concept. We discuss the applicable methods of recovering ammonia nitrogen in several main wastewater plants. Finally, we prospect the research direction of ammonia removal and recovery in wastewater based on sustainable development.

中文翻译：

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各种废水氨氮脱除氨氮回收新进展

在废水处理和水净化过程中氨氮的回收在能源和经济发展中变得越来越重要。废水中氨氮的浓度因废水类型而异，使得氨氮回收技术的选择具有挑战性。同时，传统的脱氮方法浪费了氨氮资源。本综述基于循环经济，综合介绍了城市污水、工业污水、畜禽污水和垃圾渗滤液等几种主要氨氮源污水厂的特点及其各自的处理挑战。此外，我们还介绍了目前在物理（气提、气提）废水氨氮脱除工艺中采用的主要方法。离子交换和吸附、膜和电容去离子）、化学（氯化、鸟粪石沉淀、电化学氧化和光催化）和生物（经典和典型活性污泥、基于活性污泥的新方法、微藻和光合细菌）分类基于氨回收概念。我们讨论了几个主要污水厂回收氨氮的适用方法。最后，展望了基于可持续发展的废水中氨去除与回收的研究方向。微藻和光合细菌）基于氨回收概念的分类。我们讨论了几个主要污水厂回收氨氮的适用方法。最后，展望了基于可持续发展的废水中氨去除与回收的研究方向。微藻和光合细菌）基于氨回收概念的分类。我们讨论了几个主要污水厂回收氨氮的适用方法。最后，展望了基于可持续发展的废水中氨去除与回收的研究方向。