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Characteristics of Sludge from the Treatment of Soilless Plant Cultivation Wastewater in a Rotating Electrobiological Disc Contactor (REBDC)

Author

Listed:
  • Joanna Rodziewicz

    (Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Warszawska 117a, 10-719 Olsztyn, Poland)

  • Artur Mielcarek

    (Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Warszawska 117a, 10-719 Olsztyn, Poland)

  • Wojciech Janczukowicz

    (Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Warszawska 117a, 10-719 Olsztyn, Poland)

  • Jorge Manuel Rodrigues Tavares

    (Department of Technologies and Applied Sciences, School of Agriculture, Polytechnic Institute of Beja, Apartado 6155, 7800-295 Beja, Portugal
    Fiber Materials and Environmental Technologies (FibEnTech-UBI), Universidade da Beira Interior, R. Marquês de D’Ávila e Bolama, 6201-001 Covilhã, Portugal)

  • Krzysztof Jóźwiakowski

    (Department of Environmental Engineering and Geodesy, University of Life Sciences in Lublin, Leszczyńskiego 7, 20-069 Lublin, Poland)

Abstract

Due to the high nitrogen and phosphorus concentrations in wastewater from soilless cultivation of tomatoes, the sludge formed during wastewater treatment can be used as a source of nutrients in agriculture. The effect of electrical direct current (DC) density (J) and hydraulic retention time (HRT) in a rotating electrobiological contactor (REBDC) on the quantity and quality of sludge generated in the process of tomato soilless cultivation wastewater treatment was determined. The cathode consisted of discs immobilized with biomass, while the anode was an aluminum electrode. HRTs of 4 h, 8 h, 12 h, 24 h and (J) of 0.63, 1.25, 2.50, 5.00, and 10.00 A/m 2 were applied. The study showed that the increase in (J) caused an increase in the amount of sludge generated. The increase of (J) contributed to increased concentrations of biogenes in the sludge, whereas extension of HRT at a given current density contributed to increased concentrations of nitrogen and phosphorus (up to 6.2% and 0.8% respectively) and to the reduced content of organic matter (up to 23.04%). The examined sludge was stabilized, sanitary, and safe, and may be an alternative to mineral fertilizers. This study showed that larger sludge amounts are produced in a DC mode aerobic REBDC than in an alternating current anaerobic one.

Suggested Citation

  • Joanna Rodziewicz & Artur Mielcarek & Wojciech Janczukowicz & Jorge Manuel Rodrigues Tavares & Krzysztof Jóźwiakowski, 2023. "Characteristics of Sludge from the Treatment of Soilless Plant Cultivation Wastewater in a Rotating Electrobiological Disc Contactor (REBDC)," Energies, MDPI, vol. 16(3), pages 1-15, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1022-:d:1038533
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    References listed on IDEAS

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    1. Saba Daneshgar & Arianna Callegari & Andrea G. Capodaglio & David Vaccari, 2018. "The Potential Phosphorus Crisis: Resource Conservation and Possible Escape Technologies: A Review," Resources, MDPI, vol. 7(2), pages 1-22, June.
    2. Park, Jong-Hwan & Kim, Seong-Heon & Delaune, Ronald D. & Cho, Ju-Sik & Heo, Jong-Soo & Ok, Yong Sik & Seo, Dong-Cheol, 2015. "Enhancement of nitrate removal in constructed wetlands utilizing a combined autotrophic and heterotrophic denitrification technology for treating hydroponic wastewater containing high nitrate and low ," Agricultural Water Management, Elsevier, vol. 162(C), pages 1-14.
    3. Joanna Rodziewicz & Artur Mielcarek & Kamil Bryszewski & Wojciech Janczukowicz & Karolina Kłobukowska, 2022. "Energy Consumption for Nutrient Removal from High-Nitrate and High-Phosphorus Wastewater in Aerobic and Anaerobic Bioelectrochemical Reactors," Energies, MDPI, vol. 15(19), pages 1-15, October.
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    1. Artur Mielcarek & Kamil Łukasz Bryszewski & Joanna Rodziewicz & Karolina Kłobukowska & Wojciech Janczukowicz, 2024. "Phosphorus Removal Rate and Efficiency in an Electrochemical Sequencing Reactor for the Treatment of Wastewater with Low Organic Carbon Content," Energies, MDPI, vol. 17(6), pages 1-15, March.

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