Performance and microbial community structure of BC/FeC2O4/SB modified carriers on the nitrogen removal from mariculture wastewater

IF 3.4 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Environmental Science and Technology Pub Date : 2025-07-19 DOI:10.1007/s13762-025-06646-4

A. Shitu, M. A. Tadda, H. Li, U. A. Danhassan, M. Gouda, J. Zhou, D. Liu, W. Chen, S. Zhu

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Abstract

The recent development in mariculture production has led to the global need to find an eco-friendly treatment that could mitigate the detrimental effects of nitrogenous compounds on aquatic species, the environment, and public health. The potential application of corn straw biochar (BC) combined with nano-ferrous oxalate (FeC₂O₄), integrated into a sponge (BC/FeC₂O₄/SB) as a cost-effective and sustainable novel carrier for the removal of nitrogenous compounds, was explored in this study. The modified carriers were filled into a moving bed bioreactor (MBBR) to treat simulated saline aquaculture wastewater for the first time. Scanning electron microscope (SEM) and Fourier-transform infrared (FTIR) spectroscopy analyses characterized the carrier biofilm morphology and functional group compositions. Findings showed that the modified carrier achieved the highest reduction percentages of 99.49 ± 0.29% for ammonium and 81.3 ± 2.1% for nitrate, with lower nitrite accumulation by day 136. The microbial sequencing analysis revealed that the coexistence of nitrogen removal and salt-tolerant microbes from the genera Aquimonas (25.15%), Woodsholea (20.44%), Hydrogenophaga (14.73%), Nitrosomonas (4.01%), Rhodococcus (2.70%), and Nitrospira (1.97%) resulted in the enhanced treatment performance observed in the modified BC/FeC₂O₄/SB carrier-filled MBBR as compared to the control MBBR. The data obtained in this study provide a comprehensive understanding of the role of modified BC/FeC₂O₄/SB carriers for the efficient treatment of saline RAS wastewater using MBBR.

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BC/FeC2O4/SB改性载体对海水养殖废水脱氮性能及微生物群落结构的影响

海水养殖生产的最新发展导致全球需要找到一种生态友好的处理方法，以减轻含氮化合物对水生物种、环境和公众健康的有害影响。本研究探讨了玉米秸秆生物炭（BC）与纳米草酸亚铁（FeC2O4）结合，整合成海绵（BC/FeC2O4/SB）作为一种经济、可持续的新型载体去除含氮化合物的潜在应用前景。首次将改性载体装入移动床生物反应器（MBBR）处理模拟含盐水产养殖废水。扫描电镜（SEM）和傅里叶变换红外光谱（FTIR）分析表征了载体生物膜的形态和官能团组成。结果表明，改性载体对铵的还原率最高，为99.49±0.29%，对硝态氮的还原率为81.3±2.1%，第136天亚硝酸盐的积累量较低。微生物测序分析表明，与对照MBBR相比，改性BC/FeC2O4/SB填料MBBR中存在脱氮和耐盐微生物，分别为Aquimonas（25.15%）、Woodsholea（20.44%）、Hydrogenophaga（14.73%）、Nitrosomonas（4.01%）、Rhodococcus（2.70%）和Nitrospira（1.97%）。本研究获得的数据全面了解了改性BC/FeC2O4/SB载体在MBBR高效处理含盐RAS废水中的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.