The influencing mechanisms and optimization strategies of organics on anammox process: A critical review

Chemical Engineering Journal, Год журнала: 2024, Номер 493, С. 152743 - 152743

Опубликована: Июнь 1, 2024

Язык: Английский

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Diatomite powder carrier improved nitrogen and phosphorus removal from real municipal wastewater: Insights into micro-granule formation and enhancement mechanism

Chemical Engineering Journal, Год журнала: 2024, Номер 484, С. 149482 - 149482

Опубликована: Фев. 9, 2024

Язык: Английский

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Improving the anammox performance in municipal wastewater treatment based on the powder functional carriers: A critical review

Chemical Engineering Journal, Год журнала: 2023, Номер 470, С. 144167 - 144167

Опубликована: Июнь 19, 2023

Язык: Английский

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Shift in microorganism and functional gene abundance during completely autotrophic nitrogen removal over nitrite (CANON) process

Journal of Environmental Management, Год журнала: 2024, Номер 359, С. 121009 - 121009

Опубликована: Май 1, 2024

Язык: Английский

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Dynamic pulse approach to enhancing mainstream Anammox process stability: Integrating sidestream support and tackling nitrite-oxidizing bacteria challenges

Bioresource Technology, Год журнала: 2024, Номер 395, С. 130327 - 130327

Опубликована: Янв. 17, 2024

Nitrite-oxidizing bacteria (NOB) seriously threaten the partial nitritation and Anammox (PN/A) process, hindering its mainstream application. Herein, a one-stage PN/A reactor was continuously operated for 245 days under nitrogen loading rate lifted from 0.4 g N/L/d to 0.6 0.8 with removal efficiency of 71 %, 64 41 respectively. Furthermore, NOB species over time identified as Nitrospira_sp._OLB3, exhibiting an increase relative abundance 0.9 % 4.3 %. The hydroxyapatite (HAP) granules gradually lost their microbiological function then aged, leading dominance. Therefore, one "pulse therapy" introduced combined "continuous enhancement" sludge supported by sidestream competitively limit dynamics. treatment's effect persisted around two months. strategy that returning at least 50 impaired HAP granular recultivation could fulfill bottlenecks PN/A.

Язык: Английский

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Formation of autotrophic nitrogen removal granular sludge driven by the dual-partition airlift internal circulation: Insights from performance assessment, community succession, and metabolic mechanism

Journal of Environmental Management, Год журнала: 2024, Номер 353, С. 120158 - 120158

Опубликована: Янв. 24, 2024

Язык: Английский

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Genome-Resolved Metagenomic and Metatranscriptomics Reveal Feammox Metabolism of Anaerobic Ammonia Oxidation Bacteria in Microaerobic Granular Sludge

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 6, 2025

Anammox is an energy-efficient nitrogen removal process in which anammox bacteria (AnAOB) oxidize NH4+-N to N2 using NO2--N as the electron acceptor. Recent evidence suggests that AnAOB can perform extracellular transfer (EET), potentially coupling Fe(III) reduction with oxidation (Feammox). However, whether directly participate Feammox within complex wastewater treatment systems remains unclear. Here, we investigated iron-mediated metabolism pathways a microaerobic granular sludge (MGS) reactor by integrating enzyme inhibition assays analyses of gene dynamics and co-occurrence patterns nitrogen- iron-cycling genes. Results demonstrate contributed activity. The iron CT573071, coding porin-cytochrome c protein associated EET, co-occurred hao, hzsABC, hdh genes Candidatus Kuenenia, suggesting its role Feammox. Furthermore, four high-quality metagenome-assembled genomes (MAGs) affiliated Kuenenia stuttgartiensis_A harbored hao-like, genes, along hao-cluster, catalyzes hydroxylamine. This genomic further supports their dual metabolic capacity. Metatranscriptomic analysis confirmed CT573071 upregulation coexpression These findings establish potential K. Feammox, providing novel insights into low-strength systems.

Язык: Английский

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Effect of influent C/N ratios on high-concentration powder carrier bio-fluidized bed (HPB) process: Performance, sludge characteristics, and microbial community

Journal of Water Process Engineering, Год журнала: 2024, Номер 62, С. 105375 - 105375

Опубликована: Апрель 25, 2024

Язык: Английский

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Responses of suspended sludge and biofilm in a SNAD system under C/N elevation: Microbial activity, nitrogen conversion flux and molecular ecological network

The Science of The Total Environment, Год журнала: 2024, Номер 954, С. 176236 - 176236

Опубликована: Сен. 17, 2024

Язык: Английский

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Enhancing simultaneous nitrogen and phosphorus removal using partial nitritation/anammox with an airlift inner-circulation partition bioreactor

Chemical Engineering Journal, Год журнала: 2024, Номер 501, С. 157625 - 157625

Опубликована: Ноя. 12, 2024

Язык: Английский

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