Removal efficiency of nitrogen and phosphorus in mariculture effluent by an immobilized algae-bacteria system

IF 3.7 2区农林科学 Q1 FISHERIES

Aquaculture Reports Pub Date : 2025-09-25 DOI:10.1016/j.aqrep.2025.103128

Junze Wu , Tong Li , Junting Li , Yongzhi Chen , Shafira Citra Desrika Putri , Yuge Peng , Ning Zhang , Yulei Zhang

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Abstract

To explore the removal efficiency of nitrogen and phosphorus in mariculture effluent, Oocystis borgei and Algoriphagus marincola were used to construct an immobilized algae-bacteria system embedded in calcium alginate. Various initial concentrations of ammonia nitrogen (2.5, 10, 30, and 50 mg/L) and carbon (5, 10, 15, and 25 mg/L) with a constant initial phosphorus concentration of 3 mg/L were set to investigate the efficiency of the algae-bacteria system in removing nitrogen and phosphorus from simulated mariculture effluent. The results showed that within a certain range, as the concentration of ammonia nitrogen increased, the removal efficiency of the algae-bacteria system for both nitrogen and phosphate improved, with ammonia nitrogen removal reaching 17.75–20.08 mg/L and phosphate removal rates exceeding 85 % when the ammonia nitrogen concentration was above 30 mg/L. At a carbon concentration of 5 mg/L, the algae-bacteria system had a greater ability to remove nitrogen and phosphorus, with an ammonia nitrogen removal rate of 80.8 % and a phosphate removal rate of 99 %. Compared to the efficiency of single algae or bacteria, the absorption capacity of nitrogen and phosphorus by the algae-bacteria system was significantly enhanced (P < 0.05). The study showed that the combined use of O. borgei and A. marincola can effectively remove ammonia nitrogen and phosphate in mariculture effluent. This research provides a theoretical basis for the application of immobilized O. borgei and A. marincola in the treatment of industrial mariculture effluent.

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固定化藻类-细菌系统对海水养殖废水中氮磷的去除效果

为探讨海水养殖废水中氮、磷的去除效果，以博氏卵囊藻和海藻为材料，构建了嵌入藻酸钙的固定化藻菌体系。设置不同初始浓度的氨氮（2.5、10、30和50 mg/L）和碳（5、10、15和25 mg/L），初始磷浓度恒定为3 mg/L，研究藻类-细菌系统对模拟海水养殖废水中氮和磷的去除效率。结果表明，在一定范围内，随着氨氮浓度的增加，藻菌系统对氮和磷酸盐的去除率均有所提高，当氨氮浓度大于30 mg/L时，氨氮去除率可达17.75 ~ 20.08 mg/L，磷酸盐去除率可达85 %以上。在碳浓度为5 mg/L时，藻菌体系对氮、磷的去除率较高，氨氮去除率为80.8 %，磷酸盐去除率为99 %。与单一藻类或细菌的效率相比，藻类-细菌系统对氮和磷的吸收能力显著提高（P <； 0.05）。研究表明，博氏藻与马氏藻联合使用可有效去除海水养殖出水中的氨氮和磷酸盐。本研究为固定化博氏藻和marincola藻在工业海水养殖废水处理中的应用提供了理论依据。

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来源期刊

Aquaculture Reports Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

5.90

自引率

8.10%

发文量

469

审稿时长

77 days

期刊介绍： Aquaculture Reports will publish original research papers and reviews documenting outstanding science with a regional context and focus, answering the need for high quality information on novel species, systems and regions in emerging areas of aquaculture research and development, such as integrated multi-trophic aquaculture, urban aquaculture, ornamental, unfed aquaculture, offshore aquaculture and others. Papers having industry research as priority and encompassing product development research or current industry practice are encouraged.