{"title":"Optimized nitrogen removal in low-carbon settings via sequencing batch reactors with vermiculite-enveloped layered double hydroxides bio-fillers","authors":"Lv Xi, Zhang Peng, Zhang Qiwu, He Xiaoman","doi":"10.1016/j.procbio.2025.01.016","DOIUrl":null,"url":null,"abstract":"<div><div>This study assesses Mg-Al-LDHs (Layered Double Hydroxides) /VMT (Vermiculite) and Zn-Al-LDHs/VMT as bioreactor packing materials in Sequencing Batch Reactor (SBR) systems for nitrogen removal. The materials were synthesized using a ball milling-hydrothermal method and tested under low-carbon conditions. The study achieved rapid start-up within 24 days, with ammonia nitrogen conversion rates of 77.9 % and 77.3 % for Mg-Al-LDHs/VMT and Zn-Al-LDHs/VMT, respectively, compared to less than 40 % in the control group. The VMT-LDHs bio-filler facilitated the formation of a dynamic film, enhancing biological adherence and adsorption of ammonia nitrogen and dissolved oxygen. This significantly improved the nitrification and denitrification processes. These findings highlight the potential of Mg-Al-LDHs/VMT and Zn-Al-LDHs/VMT to enhance nitrogen removal efficiency in wastewater treatment.</div></div>","PeriodicalId":20811,"journal":{"name":"Process Biochemistry","volume":"150 ","pages":"Pages 229-237"},"PeriodicalIF":4.0000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Process Biochemistry","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359511325000169","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/19 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
This study assesses Mg-Al-LDHs (Layered Double Hydroxides) /VMT (Vermiculite) and Zn-Al-LDHs/VMT as bioreactor packing materials in Sequencing Batch Reactor (SBR) systems for nitrogen removal. The materials were synthesized using a ball milling-hydrothermal method and tested under low-carbon conditions. The study achieved rapid start-up within 24 days, with ammonia nitrogen conversion rates of 77.9 % and 77.3 % for Mg-Al-LDHs/VMT and Zn-Al-LDHs/VMT, respectively, compared to less than 40 % in the control group. The VMT-LDHs bio-filler facilitated the formation of a dynamic film, enhancing biological adherence and adsorption of ammonia nitrogen and dissolved oxygen. This significantly improved the nitrification and denitrification processes. These findings highlight the potential of Mg-Al-LDHs/VMT and Zn-Al-LDHs/VMT to enhance nitrogen removal efficiency in wastewater treatment.
期刊介绍：
Process Biochemistry is an application-orientated research journal devoted to reporting advances with originality and novelty, in the science and technology of the processes involving bioactive molecules and living organisms. These processes concern the production of useful metabolites or materials, or the removal of toxic compounds using tools and methods of current biology and engineering. Its main areas of interest include novel bioprocesses and enabling technologies (such as nanobiotechnology, tissue engineering, directed evolution, metabolic engineering, systems biology, and synthetic biology) applicable in food (nutraceutical), healthcare (medical, pharmaceutical, cosmetic), energy (biofuels), environmental, and biorefinery industries and their underlying biological and engineering principles.
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