Impact of salinity on nitrogen removal pathways and microbial community dynamics in a coupled partial nitrification-short-cut sulfur autotrophic denitrification system
Shuaifeng Jiang , Sijing Chen , Jinqiu Song , Yuxin Fan , Jianhua Xiong , Yongli Chen , Ziyuan Lin , Shuangfei Wang
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引用次数: 0
Abstract
Mariculture tailwater, characterized by high salinity and a low carbon-to‑nitrogen (C/N), presents challenges for efficient wastewater treatment. This study introduces an innovative biofilm reactor coupling partial nitrification (PN) with short-cut sulfur autotrophic denitrification (SSAD) to address these challenges without requiring additional organic carbon. Results showed that increased salinity reduced nitrite-oxidizing bacteria (NOB) while enhancing ammonia-oxidizing bacteria (AOB), streamlining nitrogen removal. The system achieved a total nitrogen removal efficiency of 95.00 %, with minimal sulfate by-products. Microbial analysis revealed dominant genera Nitrosomonas (27.22 %) in PN and Thiobacillus (30.01 %) in SSAD. Functional predictions showed significant increases in amoA (+267.26 %) and decreases in nxrAB (−46.40 %) and napAB (−83.74 %) with salinity addition. These findings demonstrate the system's potential as a scalable, eco-friendly solution for mariculture wastewater treatment, advancing sustainability in aquaculture.
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The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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