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  1. Article ; Online: Bioenergy-producing two-stage septic tank and floating wetland for onsite wastewater treatment: Circuit connection and external aeration.

    Saeed, Tanveer / Al-Muyeed, Abdullah / Zaman, Takrim / Hasan, Mehedi / Ahmed, Tanvir

    Journal of environmental management

    2024  Volume 359, Page(s) 121011

    Abstract: This study designed a two-stage, electrode-integrated septic tank-floating wetland system and assessed their pollutant removal performances under variable operational conditions. The two-stage system achieved mean organic, nitrogen, phosphorus, and ... ...

    Abstract This study designed a two-stage, electrode-integrated septic tank-floating wetland system and assessed their pollutant removal performances under variable operational conditions. The two-stage system achieved mean organic, nitrogen, phosphorus, and coliform removal percentages of 99, 78, 99, and 97%, respectively, throughout the experimental run. The mean metals (chromium, cadmium, nickel, copper, zinc, lead, iron, and manganese) removal percentages ranged between 81 and 98%. Accumulated sludge, filler media, and the hanging root mass contributed to pollutant removals by supporting physicochemical and biological pathways. The mean effluent organic concentration and coliform number across the two-stage system were 20 mg/L and 1682 CFU/100 mL, respectively, during the closed-circuit protocol, which was beneath the open-circuit-based performance profiles, i.e., 32 mg/L and 2860 CFU/100 mL, respectively. Effluent organic, nitrogen, phosphorus, metals, and coliform number ranges across the two-stage system were 9-17 mg/L, 13-24 mg/L, 1-1.5 mg/L, 0.001-0.2 mg/L, and 1410-2270 CFU/100 mL, respectively during intermittent and continuous aeration periods. The air supply rate differences influenced pollutant removal depending on the associated removal mechanisms. The non-aeration phase produced higher effluent pollutant concentrations than the aeration periods-based profiles. The overall mean power density production of the septic tank ranged between 107 and 596 mW/m
    Language English
    Publishing date 2024-04-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2024.121011
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  2. Article ; Online: Organic media-based two-stage traditional and electrode-integrated tidal flow wetlands to treat landfill leachate: Influence of aeration strategy and plants

    Saeed, Tanveer / Zaman, Takrim / Miah, Md Jihad / Yadav, Asheesh Kumar / Majed, Nehreen

    Journal of Environmental Management. 2023 Mar., v. 330 p.117253-

    2023  

    Abstract: Landfill leachate treatment employing normal and electrode-integrated constructed wetlands is difficult due to the presence of significant amounts of organic compounds, which frequently impede the progression of microbial-based aerobic pollutant removal ... ...

    Abstract Landfill leachate treatment employing normal and electrode-integrated constructed wetlands is difficult due to the presence of significant amounts of organic compounds, which frequently impede the progression of microbial-based aerobic pollutant removal pathways. As a result, this study examines the effect of supplementary air availability via intermittent and continuous aeration strategies in improving organic, nutrient, and coliform removals of the unplanted, planted (normal and electrode-integrated) two-stage tidal flow constructed wetlands designed to treat landfill leachate. The constructed wetlands were filled with coal and biochar media and planted with Canna indica. Mean chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP), and coliform removal percentages of the externally aerated two-stage unplanted, only planted, planted-microbial fuel cell integrated constructed wetland systems ranged between 96 and 99%, 82 and 93%, 91 and 98%, 86 and 96%, respectively, throughout the experimental campaign. External aeration inhibited the development of a dominant anaerobic environment within the media of the wetland systems and improved overall pollutant removal. The electrode-integrated planted tidal flow wetlands produced better effluent quality than the unplanted or only planted tidal flow systems without electrode assistance. The first stages of the three wetland systems achieved an additional 5–7% COD, 7–12% TN, and 15–22% coliform removal during the continuous aeration period compared to the corresponding performance of the intermittent aeration phase. The pollutant removal performance of the second-stage wetlands decreased during the continuous aeration phase. The media composition supported electrochemically active and inactive microbial-based pollutant removal routes and the chemical adsorption of pollutants. Nitrogen and phosphorus accumulation percentage in plant tissues was low, i.e., 0.4–2.2% and 0.04–0.8%, respectively. During the continuous aeration period, the electrode-integrated tidal flow constructed wetlands achieved higher power density production, i.e., between 859 and 1432 mW (mW)/meter³(m³). This study demonstrates that external aeration might improve pollutant removal performance of the normal, electrodes integrated tidal flow-based constructed wetlands when employed for high organic-strength wastewater treatment such as landfill leachate.
    Keywords Canna indica ; adsorption ; aeration ; air ; biochar ; chemical oxygen demand ; coal ; coliform bacteria ; constructed wetlands ; electrochemistry ; electrodes ; fuel cells ; landfill leachates ; nitrogen ; phosphorus ; pollution control ; total nitrogen ; total phosphorus ; wastewater treatment ; Bioenergy ; Electrode ; Pollutant removal
    Language English
    Dates of publication 2023-03
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.117253
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    In stock of ZB MED Bonn / Germany

    Z 7556: Show issues

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  3. Article ; Online: Organic media-based two-stage traditional and electrode-integrated tidal flow wetlands to treat landfill leachate: Influence of aeration strategy and plants.

    Saeed, Tanveer / Zaman, Takrim / Miah, Md Jihad / Yadav, Asheesh Kumar / Majed, Nehreen

    Journal of environmental management

    2023  Volume 330, Page(s) 117253

    Abstract: Landfill leachate treatment employing normal and electrode-integrated constructed wetlands is difficult due to the presence of significant amounts of organic compounds, which frequently impede the progression of microbial-based aerobic pollutant removal ... ...

    Abstract Landfill leachate treatment employing normal and electrode-integrated constructed wetlands is difficult due to the presence of significant amounts of organic compounds, which frequently impede the progression of microbial-based aerobic pollutant removal pathways. As a result, this study examines the effect of supplementary air availability via intermittent and continuous aeration strategies in improving organic, nutrient, and coliform removals of the unplanted, planted (normal and electrode-integrated) two-stage tidal flow constructed wetlands designed to treat landfill leachate. The constructed wetlands were filled with coal and biochar media and planted with Canna indica. Mean chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP), and coliform removal percentages of the externally aerated two-stage unplanted, only planted, planted-microbial fuel cell integrated constructed wetland systems ranged between 96 and 99%, 82 and 93%, 91 and 98%, 86 and 96%, respectively, throughout the experimental campaign. External aeration inhibited the development of a dominant anaerobic environment within the media of the wetland systems and improved overall pollutant removal. The electrode-integrated planted tidal flow wetlands produced better effluent quality than the unplanted or only planted tidal flow systems without electrode assistance. The first stages of the three wetland systems achieved an additional 5-7% COD, 7-12% TN, and 15-22% coliform removal during the continuous aeration period compared to the corresponding performance of the intermittent aeration phase. The pollutant removal performance of the second-stage wetlands decreased during the continuous aeration phase. The media composition supported electrochemically active and inactive microbial-based pollutant removal routes and the chemical adsorption of pollutants. Nitrogen and phosphorus accumulation percentage in plant tissues was low, i.e., 0.4-2.2% and 0.04-0.8%, respectively. During the continuous aeration period, the electrode-integrated tidal flow constructed wetlands achieved higher power density production, i.e., between 859 and 1432 mW (mW)/meter
    MeSH term(s) Water Pollutants, Chemical ; Wetlands ; Organic Chemicals ; Nitrogen/analysis ; Plants ; Biological Oxygen Demand Analysis ; Electrodes ; Phosphorus/analysis ; Waste Disposal, Fluid
    Chemical Substances Water Pollutants, Chemical ; Organic Chemicals ; Nitrogen (N762921K75) ; Phosphorus (27YLU75U4W)
    Language English
    Publishing date 2023-01-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.117253
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 7556: Show issues

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  4. Article ; Online: Influence of aeration, plants, electrodes, and pollutant loads on treatment performance of constructed wetlands: A comprehensive study with septage.

    Saeed, Tanveer / Al-Muyeed, Abdullah / Yadav, Asheesh Kumar / Miah, Md Jihad / Hasan, Md Rashedul / Zaman, Takrim / Hasan, Mehedi / Ahmed, Tanvir

    The Science of the total environment

    2023  Volume 892, Page(s) 164558

    Abstract: This study reports the performance of non-aerated and aerated unplanted, planted, microbial fuel cell planted wetlands for stabilizing septage and treating the drained wastewater. The wetland systems of this study were dosed with septage for a relatively ...

    Abstract This study reports the performance of non-aerated and aerated unplanted, planted, microbial fuel cell planted wetlands for stabilizing septage and treating the drained wastewater. The wetland systems of this study were dosed with septage for a relatively shorter period, i.e., 20 weeks, followed by 60 days of sludge drying period. The sludge loading rates across the constructed wetlands ranged between 259 and 624 kg total solids (TS)/m
    MeSH term(s) Wastewater ; Sewage ; Waste Disposal, Fluid ; Wetlands ; Environmental Pollutants/metabolism ; Plants/metabolism ; Nitrogen/analysis ; Phosphorus/analysis ; Electrodes ; Biological Oxygen Demand Analysis
    Chemical Substances Wastewater ; Sewage ; Environmental Pollutants ; Nitrogen (N762921K75) ; Phosphorus (27YLU75U4W)
    Language English
    Publishing date 2023-06-02
    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.2023.164558
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
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  5. Article ; Online: Influence of aeration, plants, electrodes, and pollutant loads on treatment performance of constructed wetlands: A comprehensive study with septage

    Saeed, Tanveer / Muyeed, Abdullah Al- / Yadav, Asheesh Kumar / Miah, Md Jihad / Hasan, Md Rashedul / Zaman, Takrim / Hasan, Mehedi / Ahmed, Tanvir

    Science of the Total Environment. 2023 Sept., v. 892 p.164558-

    2023  

    Abstract: This study reports the performance of non-aerated and aerated unplanted, planted, microbial fuel cell planted wetlands for stabilizing septage and treating the drained wastewater. The wetland systems of this study were dosed with septage for a relatively ...

    Abstract This study reports the performance of non-aerated and aerated unplanted, planted, microbial fuel cell planted wetlands for stabilizing septage and treating the drained wastewater. The wetland systems of this study were dosed with septage for a relatively shorter period, i.e., 20 weeks, followed by 60 days of sludge drying period. The sludge loading rates across the constructed wetlands ranged between 259 and 624 kg total solids (TS)/m² per year. Organic matter, nitrogen, and phosphorus concentration of the residual sludge ranged between 8512 and 66,374 mg/kg, 12,950 and 14,050 mg/kg, 4979 and 9129 mg/kg, respectively. The presence of plants, electrode, and aeration improved sludge dewatering and decreased the organic matter and nutrient concentration of the residual sludge. The heavy metals (Cd, Cr, Cu, Fe, Pb, Mn, Ni, and Zn) concentration of the residual sludge fulfilled the guidelines for agricultural reuse in Bangladesh. Chemical oxygen demand (COD), ammoniacal nitrogen (NH₄-N), total nitrogen (TN), total phosphorus (TP), and coliform removal percentages from the drained wastewater ranged between 91 and 93 %, 88 and 98 %, 90 and 99 %, 92 and 100 %, and 75 and 90 %, respectively. NH₄-N removal from the drained wastewater depended upon aeration. The sludge treatment wetlands achieved metals removal percentages (from the drained wastewater) ranging between 90 and 99 %. Physicochemical and microbial routes in accumulated sludge, rhizosphere, and media contributed to pollutants removal. Input load and organic removal increment (from the drained wastewater) were positively correlated; nutrient removal showed a contradictory trend. The non-aerated and aerated microbial fuel cell planted wetlands produced maximum power densities ranging between 66 and 3417 mW/m³. Because of the shorter experimental duration, this study revealed preliminary but new information on the macro and micro pollutants removal pathways in septage sludge wetlands (with and without electrode) that could be utilized to design pilot or full-scale systems.
    Keywords aeration ; ammonium nitrogen ; chemical oxygen demand ; coliform bacteria ; dewatering ; electrodes ; environment ; microbial fuel cells ; nitrogen ; nutrient content ; organic matter ; phosphorus ; pollutants ; rhizosphere ; sludge ; total nitrogen ; total phosphorus ; wastewater ; wetlands ; Bangladesh ; Bioenergy ; Effluent disposal ; Pollutants removal ; Reuse
    Language English
    Dates of publication 2023-09
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.164558
    Database NAL-Catalogue (AGRICOLA)

    Full text online

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