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  1. Article ; Online: Predictive modeling based on artificial neural networks for membrane fouling in a large pilot-scale anaerobic membrane bioreactor for treating real municipal wastewater.

    Wang, Tianjie / Li, Yu-You

    The Science of the total environment

    2023  Volume 912, Page(s) 169164

    Abstract: Membrane fouling is the primary obstacle to applying anaerobic membrane bioreactors (AnMBRs) in municipal wastewater treatment. This issue holds critical significance as efficient wastewater treatment serves as a cornerstone for achieving environmental ... ...

    Abstract Membrane fouling is the primary obstacle to applying anaerobic membrane bioreactors (AnMBRs) in municipal wastewater treatment. This issue holds critical significance as efficient wastewater treatment serves as a cornerstone for achieving environmental sustainability. This study uses machine learning to predict membrane fouling, taking advantage of rapid computational and algorithmic advances. Based on the 525-day operation data of a large pilot-scale AnMBR for treating real municipal wastewater, regression prediction was realized using multilayer perceptron (MLP) and long short-term memory (LSTM) artificial neural networks under substantial variations in operating conditions. The models involved employing the organic loading rate, suspended solids concentration, protein concentration in extracellular polymeric substance (EPS
    MeSH term(s) Wastewater ; Waste Disposal, Fluid ; Anaerobiosis ; Extracellular Polymeric Substance Matrix ; Membranes, Artificial ; Bioreactors ; Sewage
    Chemical Substances Wastewater ; Membranes, Artificial ; Sewage
    Language English
    Publishing date 2023-12-10
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.169164
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Methanogenic treatment of dairy wastewater: A review of current obstacles and new technological perspectives.

    Ye, Min / Li, Yu-You

    The Science of the total environment

    2023  Volume 866, Page(s) 161447

    Abstract: Methanogenic treatment can effectively manage wastewater in the dairy industry. However, its treatment efficiency and stability are problematic due to the feature of wastewater. This review comprehensively summarizes the dairy wastewater characteristics ... ...

    Abstract Methanogenic treatment can effectively manage wastewater in the dairy industry. However, its treatment efficiency and stability are problematic due to the feature of wastewater. This review comprehensively summarizes the dairy wastewater characteristics and reveals the mechanisms and impacts of three critical issues in anaerobic treatment, including ammonia and long-chain fatty acid (LCFA) inhibition and trace metal (TM) deficiency. It evaluates current remedial strategies and the implementation of anaerobic membrane bioreactor (AnMBR) technology. It assesses the use of nitrogen-removed effluent return to dilute the influent for solving protein-rich dairy wastewater treatment. It explores the methodology of TM addition to dairy wastewater in accordance with microbial TM content and proliferation. It analyzes the multiple benefits of applying high-solid AnMBR to lipid-rich influent to mitigate LCFA inhibition. Finally, it proposes a promising low-carbon treatment system with enhanced bioenergy recovery, nitrogen removal, and simultaneous phosphorus recovery that could promote carbon neutrality for dairy industry wastewater treatment.
    MeSH term(s) Wastewater ; Waste Disposal, Fluid/methods ; Anaerobiosis ; Water Purification/methods ; Bioreactors ; Carbon ; Nitrogen ; Sewage ; Methane
    Chemical Substances Wastewater ; Carbon (7440-44-0) ; Nitrogen (N762921K75) ; Sewage ; Methane (OP0UW79H66)
    Language English
    Publishing date 2023-01-06
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.161447
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Kinetic and elemental characterization of HAP-based high-rate partial nitritation/anammox system orienting stability and inorganic elemental requirements.

    Chen, Yujie / Guo, Guangze / Li, Yu-You

    Water research

    2024  Volume 251, Page(s) 121169

    Abstract: Anammox-based processes are attractive for biological nitrogen removal, and the combination of anammox and hydroxyapatite (HAP) is promising for the simultaneous removal of nitrogen and phosphorus from wastewater. However, the kinetics of one-stage ... ...

    Abstract Anammox-based processes are attractive for biological nitrogen removal, and the combination of anammox and hydroxyapatite (HAP) is promising for the simultaneous removal of nitrogen and phosphorus from wastewater. However, the kinetics of one-stage partial nitritation/anammox (PNA) in which ammonia-oxidizing bacteria (AOB) and anammox bacteria (AnAOB) exist in a reactor are poorly understood. Moreover, inorganic elements are required to promote microbial cell synthesis and growth; therefore, monitoring of elements to prevent the limitation and inhibition of the process is critical. The minimum amounts of inorganic elements required for a one-stage PNA process and the elemental flow remain unknown. Therefore, in this study, kinetics, stoichiometry, and element flow in the long-term, high-rate, continuous, one-stage HAP-PNA process with microaerobic granular sludge at 25 °C were determined using process modeling, parameter estimation, and mass balance. The biomass elemental composition was determined to be CH
    MeSH term(s) Anaerobic Ammonia Oxidation ; Oxidation-Reduction ; Bioreactors/microbiology ; Wastewater ; Sewage/microbiology ; Nitrogen ; Bacteria ; Ammonium Compounds ; Denitrification
    Chemical Substances Wastewater ; Sewage ; Nitrogen (N762921K75) ; Ammonium Compounds
    Language English
    Publishing date 2024-01-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 202613-2
    ISSN 1879-2448 ; 0043-1354
    ISSN (online) 1879-2448
    ISSN 0043-1354
    DOI 10.1016/j.watres.2024.121169
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Competitive bio-augmentation overcoming unusual direct inhibitor inefficacy in mainstream nitrite-oxidizing bacteria suppression: Unveiling the underpinnings in microbial and nitrogen metabolism aspects.

    Wei, Yanxiao / Ye, Min / Chen, Yujie / Li, Yu-You

    The Science of the total environment

    2024  Volume 926, Page(s) 171900

    Abstract: The long-stabilized mainstream partial nitritation/Anammox (PN/A) process continues to encounter significant challenges from nitrite-oxidizing bacteria (NOB). Therefore, this study aimed to determine an efficient, rapid, and easily implementable strategy ...

    Abstract The long-stabilized mainstream partial nitritation/Anammox (PN/A) process continues to encounter significant challenges from nitrite-oxidizing bacteria (NOB). Therefore, this study aimed to determine an efficient, rapid, and easily implementable strategy for inhibiting NOB. A laboratory-scale reactor was operated continuously for 325 days, experiencing NOB outbreak in mainstream and recovery with simulated sidestream support. The results show that direct inhibitory strategies including intermittent aeration and approximately 35 mg/L free ammonia had unusual weak inhibitory effects on NOB activity. Subsequently, the exogenous Anammox from sidestream employed as a competitive bio-augmentation approach rapidly inhibited NOB dynamics. Evidence suggests that the damaged hydroxyapatite granules under low pH conditions might have contributed to NOB dominance by diminishing Anammox bacteria activity, thereby creating a substrate-rich environment favoring NOB survival. In contrast, the introduction of exogenous Candidatus Kuenenia facilitated the nitrogen removal efficiency from 32.5 % to over 80 %. This coincided with a decrease in the relative abundance of Nitrospira from 16.5 % to 2.7 % and NOB activity from 0.34 to 0.07 g N/(g mixed liquor volatile suspended solid)/d. Metagenomic analysis reveals a decrease in the functional potential of most nitrite transport proteins, coupled with a significant increase in eukaryotic-like serine/threonine-protein kinase involved in cellular regulation, during the Anammox activity recovery. This study's findings reveal the feasibility of the bio-augmentation based on substrate competition, wherein sidestream processes support the mainstream PN/A integration, offering significant potential for practical applications.
    MeSH term(s) Nitrites/metabolism ; Oxidation-Reduction ; Bioreactors/microbiology ; Bacteria/metabolism ; Nitrogen/metabolism ; Sewage/microbiology ; Ammonium Compounds/metabolism
    Chemical Substances Nitrites ; Nitrogen (N762921K75) ; Sewage ; Ammonium Compounds
    Language English
    Publishing date 2024-03-24
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2024.171900
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Enhancing start-up strategies for anammox granular sludge systems: A review.

    Lin, Lan / Zhang, Yanlong / Li, Yu-You

    The Science of the total environment

    2023  Volume 902, Page(s) 166398

    Abstract: The anaerobic ammonium oxidation (anammox) process has been developed as one of the optimal alternatives to the conventional biological nitrogen removal process because of its high nitrogen removal capacity and low energy consumption. However, the slow ... ...

    Abstract The anaerobic ammonium oxidation (anammox) process has been developed as one of the optimal alternatives to the conventional biological nitrogen removal process because of its high nitrogen removal capacity and low energy consumption. However, the slow growth rate of anammox bacteria and its high sensitivity to environmental changes have resulted in fewer anammox sludge sources for process start-up and a lengthy start-up period. Given that anammox microorganisms tend to aggregate, granular-anammox sludge is a frequent byproduct of the anammox process. In this study, we review state-of-the-art strategies for promoting the formation of anammox granules and the start-up of the anammox process based on the literature of the past decade. These strategies are categorized as the transformation of alternative sludge, the addition of accelerators, the introduction of functional carriers, and the implementation of other physical methods. In addition, the formation mechanism of anammox granules, the operational performance of various strategies, and their promotion mechanisms are introduced. Finally, prospects are presented to indicate the gaps in contemporary research and the potential future research directions. This review functions as a summary guideline and theoretical reference for the cultivation of granular-anammox sludge, the start-up of the anammox process, and its practical application.
    MeSH term(s) Sewage/microbiology ; Anaerobic Ammonia Oxidation ; Oxidation-Reduction ; Bioreactors ; Bacteria ; Anaerobiosis ; Nitrogen ; Ammonium Compounds ; Denitrification
    Chemical Substances Sewage ; Nitrogen (N762921K75) ; Ammonium Compounds
    Language English
    Publishing date 2023-08-19
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.166398
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: A novel method for the whole-cell detection of environmental microorganisms using hemin and tyramide signal amplification (Hemin-TSA) with a desired fluorescent dye.

    Urasaki, Kampachiro / Li, Yu-You / Kubota, Kengo

    Systematic and applied microbiology

    2023  Volume 46, Issue 6, Page(s) 126473

    Abstract: A method called hemin-tyramide signal amplification (Hemin-TSA) was developed for visualization of environmental microorganisms using hemin and tyramide signal amplification. In Hemin-TSA, hemin, which has peroxidase activity, is bound to microbial cells, ...

    Abstract A method called hemin-tyramide signal amplification (Hemin-TSA) was developed for visualization of environmental microorganisms using hemin and tyramide signal amplification. In Hemin-TSA, hemin, which has peroxidase activity, is bound to microbial cells, and a desired fluorescent dye is deposited on the microbial cells by a hemin-catalyzed TSA reaction. The protocol was initially optimized in terms of hemin concentration, hemin binding time and repeated reaction times of TSA. Hemin-TSA showed a comparative or improved signal-to-noise ratio compared to DAPI staining. The shapes of fluorescent signals obtained from microbial cells were almost morphologically identical to those observed in phase contrast microscopy. Hemin-TSA staining provided more accurate cell counts than DAPI staining, especially for actively growing cells, for which two or three spotty DAPI signals were obtained from a single cell. In addition, microbial cells that were not detected by DAPI staining were detected by Hemin-TSA with fluorescein, which enabled us to avoid high non-specific fluorescence under UV excitation. The method developed in this study allows us to visually detect microbial cells in various environments with the characteristics of better cell morphological identification, improved enumeration accuracy and selectivity of fluorescent dyes.
    MeSH term(s) Fluorescent Dyes/chemistry ; Hemin ; RNA, Ribosomal, 16S ; Phylogeny ; Staining and Labeling
    Chemical Substances Fluorescent Dyes ; Hemin (743LRP9S7N) ; RNA, Ribosomal, 16S
    Language English
    Publishing date 2023-11-11
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 283612-9
    ISSN 1618-0984 ; 0723-2020
    ISSN (online) 1618-0984
    ISSN 0723-2020
    DOI 10.1016/j.syapm.2023.126473
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Evaluation of anaerobic membrane bioreactor treating dairy processing wastewater: Elemental flow, bioenergy production and reduction of CO

    Ye, Min / Li, Qian / Li, Yu-You

    Bioresource technology

    2023  Volume 385, Page(s) 129342

    Abstract: The management of dairy processing wastewater (DPW) must address water pollution while delivering renewable energy and recovering resources. A high-rate anaerobic membrane bioreactor (AnMBR) was investigated for treating DPW, and the system was evaluated ...

    Abstract The management of dairy processing wastewater (DPW) must address water pollution while delivering renewable energy and recovering resources. A high-rate anaerobic membrane bioreactor (AnMBR) was investigated for treating DPW, and the system was evaluated in terms of elemental flow, nutrient recovery, energy balance, and reduction of CO
    MeSH term(s) Wastewater ; Carbon Dioxide ; Anaerobiosis ; Membranes, Artificial ; Bioreactors ; Biofuels ; Waste Disposal, Fluid ; Methane ; Sewage
    Chemical Substances Wastewater ; Carbon Dioxide (142M471B3J) ; Membranes, Artificial ; Biofuels ; Methane (OP0UW79H66) ; Sewage
    Language English
    Publishing date 2023-06-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2023.129342
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Evaluation of anaerobic membrane bioreactor treating dairy processing wastewater: Elemental flow, bioenergy production and reduction of CO2 emission

    Ye, Min / Li, Qian / Li, Yu-You

    Bioresource Technology. 2023 Oct., v. 385 p.129342-

    2023  

    Abstract: The management of dairy processing wastewater (DPW) must address water pollution while delivering renewable energy and recovering resources. A high-rate anaerobic membrane bioreactor (AnMBR) was investigated for treating DPW, and the system was evaluated ...

    Abstract The management of dairy processing wastewater (DPW) must address water pollution while delivering renewable energy and recovering resources. A high-rate anaerobic membrane bioreactor (AnMBR) was investigated for treating DPW, and the system was evaluated in terms of elemental flow, nutrient recovery, energy balance, and reduction of CO₂ emission. The AnMBR system was superior in terms of both methanogenic performance and efficiency of bioenergy recovery in the DPW treatment, with a high net energy potential of 51.4–53.2 kWh/m³. The theoretical economic values of the digestate (13.8 $/m³) and permeate (4.1 $/m³) were assessed according to nutrient transformation and price of mineral fertilizer. The total CO₂ emission equivalent in the AnMBR was 44.7 kg CO₂-eq/m³, with a significant reduction of 54.1 kg CO₂-eq/m³ compared to the conventional process. The application of the AnMBR in the DPW treatment is a promising approach for the development of carbon neutrality and a circular economy.
    Keywords bioenergy ; carbon ; carbon dioxide ; circular economy ; energy balance ; membrane bioreactors ; methanogens ; mineral fertilizers ; prices ; wastewater ; water pollution ; Anaerobic treatment ; Carbon neutrality ; Nutrient recovery ; Organic fertilizer
    Language English
    Dates of publication 2023-10
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2023.129342
    Database NAL-Catalogue (AGRICOLA)

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

    Wei, Yanxiao / Chen, Yujie / Xia, Weizhe / Ye, Min / Li, Yu-You

    Bioresource technology

    2024  Volume 395, Page(s) 130327

    Abstract: 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 ... ...

    Abstract 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 g N/L/d and 0.8 g N/L/d with the nitrogen removal efficiency of 71 %, 64 %, and 41 %, respectively. Furthermore, the NOB species over time was identified as Nitrospira_sp._OLB3, exhibiting an increase of the relative abundance from 0.9 % to 4.3 %. The hydroxyapatite (HAP) granules gradually lost their microbiological function of Anammox bacteria then aged, leading to NOB dominance. Therefore, one "pulse therapy" was introduced and combined with "continuous enhancement" of Anammox sludge supported by sidestream to competitively limit the NOB dynamics. The treatment's effect persisted for around two months. The strategy that returning at least 50 % of the impaired HAP granular sludge to the sidestream for recultivation could fulfill the bottlenecks of mainstream PN/A.
    MeSH term(s) Nitrites ; Sewage/microbiology ; Anaerobic Ammonia Oxidation ; Bioreactors/microbiology ; Oxidation-Reduction ; Bacteria ; Nitrogen ; Durapatite ; Ammonium Compounds
    Chemical Substances Nitrites ; Sewage ; Nitrogen (N762921K75) ; Durapatite (91D9GV0Z28) ; Ammonium Compounds
    Language English
    Publishing date 2024-01-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2024.130327
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Optimizing hydraulic retention time of high-rate activated sludge designed for potential integration with partial nitritation/anammox in municipal wastewater treatment.

    Wei, Yanxiao / Xia, Weizhe / Ye, Min / Chen, Fuqiang / Qian, Yunzhi / Li, Yu-You

    Bioresource technology

    2024  Volume 401, Page(s) 130710

    Abstract: The integration of high-rate activated sludge (HRAS), an effective carbon redirection technology, with partial nitritation/anammox (PN/A) is a novel AB treatment process for municipal wastewater. In this study, an airlift HRAS reactor was operated in the ...

    Abstract The integration of high-rate activated sludge (HRAS), an effective carbon redirection technology, with partial nitritation/anammox (PN/A) is a novel AB treatment process for municipal wastewater. In this study, an airlift HRAS reactor was operated in the continuous inflow mode for 200 d at a wastewater treatment plant. The balance between potential PN/A system stability and peak HRAS performance under decreasing hydraulic retention time (HRT) was optimized. Energy consumption and recovery and CO
    Language English
    Publishing date 2024-04-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2024.130710
    Database MEDical Literature Analysis and Retrieval System OnLINE

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