ABSTRACT The increasing concentration of nutrient compounds such as nitrogen and phosphorus in effluents causes eutrophication results in rapid growing algae that encouraged a simultaneously decrease in the amount of dissolved O2 and causes harmful effects on the aquatic ecosystem, which leads to the killing of fish, depletion of flora and fauna to water bodies. Nitrogen and Phosphorus work like a hazardous nutrient compound causing acidification of the soil, acid rainfall, eutrophication, and toxicity. The abundance of nitrogen decreases the level of other minerals and imbalances toxic elements such as aluminium which can spread and cause harm to plants and also fish in rivers. The primary mechanisms of removal, treatment and process are described elaborately in this work. This paper highlighting the different techniques, such as whole cells-based removal, immobilisation-based methods, photobioreactor, Bio-CAST-based technology, pilot-scale biological nutrient removal technology, bio-electrochemical system, membrane bioreactor, enhanced allure-type biological system, fresh and marine water microalgae biomass, hetero-photoautotrophic two-stage cultivation, sequential adaptation, deceleration-stat technique and their removal efficiency, are discussed in detail separately. Therefore, suitable economical and optimized methods are needed globally to maintain a balanced nutrient level. This work describes the key issues related to the nitrogen and phosphorus recovery.

中文翻译：

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脱氮除磷生物技术：一个可能的见解

摘要 污水中氮和磷等营养化合物浓度的增加导致富营养化，导致藻类快速生长，同时促进溶解的 O2 量减少，并对水生生态系统造成有害影响，导致鱼类死亡、枯竭。植物群和动物群到水体。氮和磷的作用就像一种有害的营养化合物，会导致土壤酸化、酸雨、富营养化和毒性。丰富的氮降低了其他矿物质的含量，并使有毒元素（如铝）失衡，这些元素可以传播并对河流中的植物和鱼类造成伤害。在这项工作中详细描述了去除、处理和过程的主要机制。本文重点介绍了不同的技术，例如全细胞去除、固定化方法、光生物反应器、基于Bio-CAST的技术、中试规模的生物养分去除技术、生物电化学系统、膜生物反应器、增强型诱惑型生物系统、淡水和海水微藻生物量、异光自养两阶段培养、序贯适应、减速-静态技术及其去除效率，将单独详细讨论。因此，全球需要合适的经济和优化的方法来维持平衡的营养水平。这项工作描述了与氮和磷回收相关的关键问题。增强型引诱型生物系统、淡水和海水微藻生物量、异光自养两阶段培养、序贯适应、减速-静态技术及其去除效率，将单独详细讨论。因此，全球需要合适的经济和优化的方法来保持平衡的营养水平。这项工作描述了与氮和磷回收相关的关键问题。增强型引诱型生物系统、淡水和海水微藻生物量、异光自养两阶段培养、序贯适应、减速-静态技术及其去除效率，将单独详细讨论。因此，全球需要合适的经济和优化的方法来保持平衡的营养水平。这项工作描述了与氮和磷回收相关的关键问题。