With the rapid expansion of the maricultural scale, the treatment of mariculture tail water (MTW) has become a focus of marine environmental protection. Meanwhile, as a cost-effective wastewater treatment technology, immobilized algal-bacterial beads (IABB) has received wide attention. The nutrients removal of wastewater by IABB is limited by the stability and strength of the beads during the treatment process. In this study, the fabrication of IABB composing Chlorella vulgaris and activated sludge with different concentration of SA (1.5%, 2.5% and 3.5% w/v) and Ca²⁺ (2%, 3.5% and 5% w/v) and their application in the treatment of synthetic MTW was primarily investigated. The SA concentration has significant impact on the characteristics of IABB. Specifically, 2.5% of SA resulted in the formation of IABB with the best homogeneity, chemical and mechanical stability. Ca²⁺ concentration affect the nutrient removal efficiency during MTW treatment. The IABB fabricated under the conditions of 2.5% SA and 2% Ca²⁺ showed the highest removal efficiency of NH₃-N, TP and COD within the 48 h of experiment, i.e. 66.7 ± 3.2, 81.0 ± 2.8 and 90.7 ± 1.9%, respectively. Therefore, the application of IABB offers promising prospects for MTW treatment and marine environmental safety.

随着海水养殖规模的迅速扩大，海水养殖尾水（MTW）的处理已成为海洋环境保护的重点。同时，作为一种具有成本效益的废水处理技术，固定化藻菌珠（IABB）受到了广泛关注。IABB 对废水中营养物质的去除受到处理过程中珠粒稳定性和强度的限制。在本研究中，IABB 由小球藻和不同浓度 SA（1.5%、2.5% 和 3.5% w/v）和 Ca ^2+的活性污泥组成主要研究了（2%、3.5% 和 5% w/v）及其在处理合成 MTW 中的应用。SA浓度对IABB的特性有显着影响。具体而言，2.5% 的 SA 导致 IABB 的形成具有最佳的均匀性、化学和机械稳定性。Ca ²⁺浓度影响MTW处理过程中的养分去除效率。^{在2.5% SA和2% Ca 2+}条件下制备的IABB在实验48 h内对NH ₃ -N、TP和COD的去除效率最高，分别为66.7±3.2、81.0±2.8和90.7±1.9% ， 分别。因此，IABB的应用为MTW处理和海洋环境安全提供了广阔的前景。