LAPSE:2023.2697
Published Article
LAPSE:2023.2697
Purposely Development of the Adaptive Potential of Activated Sludge from Municipal Wastewater Treatment Plant Focused on the Treatment of Landfill Leachate
February 21, 2023
Abstract
Biological treatment is a key technology in landfill leachate treatment However, often its efficiency is not high enough due to the pollutants in concentrations above the critical ones. The present study aimed to investigate the adaptive responses that occur in activated sludge (AS) during landfill leachate purification. A model process with AS from a municipal wastewater treatment plant and landfill leachate in increasing concentrations was constructed. The data showed that when dilutions 25 and 50 times had been applied the structure of the AS was preserved, but the COD cannot be reduced below 209 mg O2/L. The feed of undiluted leachate destroyed the AS structure as SVI was reduced to 1 mL/g, biotic index to 1, floc size was greatly reduced and COD remained high (2526 mg O2/L). The dominant group of protozoa was changed from attached to free-swimming ciliates. An increase of the bacterial groups responsible for the xenobiotics elimination (aerobic heterotrophs, genera Pseudomonas, Acinetobacter, Azoarcus, Thauera, Alcaligenes) was registered. This was accompanied by a significant increase in free bacteria. The obtained data showed that for optimal treatment of this type of water it is necessary to include a combination of biological treatment with another non-biological method (membrane filtration, reverse osmosis, etc.).
Biological treatment is a key technology in landfill leachate treatment However, often its efficiency is not high enough due to the pollutants in concentrations above the critical ones. The present study aimed to investigate the adaptive responses that occur in activated sludge (AS) during landfill leachate purification. A model process with AS from a municipal wastewater treatment plant and landfill leachate in increasing concentrations was constructed. The data showed that when dilutions 25 and 50 times had been applied the structure of the AS was preserved, but the COD cannot be reduced below 209 mg O2/L. The feed of undiluted leachate destroyed the AS structure as SVI was reduced to 1 mL/g, biotic index to 1, floc size was greatly reduced and COD remained high (2526 mg O2/L). The dominant group of protozoa was changed from attached to free-swimming ciliates. An increase of the bacterial groups responsible for the xenobiotics elimination (aerobic heterotrophs, genera Pseudomonas, Acinetobacter, Azoarcus, Thauera, Alcaligenes) was registered. This was accompanied by a significant increase in free bacteria. The obtained data showed that for optimal treatment of this type of water it is necessary to include a combination of biological treatment with another non-biological method (membrane filtration, reverse osmosis, etc.).
Record ID
Keywords
Acinetobacter, activated sludge, adaptation, free-swimming ciliates, landfill leachate, micro- and metafauna, Pseudomonas, xenobiotics
Subject
Suggested Citation
Belouhova M, Yotinov I, Schneider I, Dinova N, Todorova Y, Lyubomirova V, Mihaylova V, Daskalova E, Lincheva S, Topalova Y. Purposely Development of the Adaptive Potential of Activated Sludge from Municipal Wastewater Treatment Plant Focused on the Treatment of Landfill Leachate. (2023). LAPSE:2023.2697
Author Affiliations
Belouhova M: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo [ORCID]
Yotinov I: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo
Schneider I: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo [ORCID]
Dinova N: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo
Todorova Y: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo [ORCID]
Lyubomirova V: Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia, Bulgaria; Trace Analysis Laboratory, Faculty of Chemistry and Pharmacy, Sofia University “St. Kliment Ohridski, 1 James Bourchier Bl
Mihaylova V: Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia, Bulgaria; Trace Analysis Laboratory, Faculty of Chemistry and Pharmacy, Sofia University “St. Kliment Ohridski, 1 James Bourchier Bl
Daskalova E: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria
Lincheva S: Municipal Enterprise for Waste Treatment, Locality Sadinata, 1805 Yana, Bulgaria
Topalova Y: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo
Yotinov I: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo
Schneider I: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo [ORCID]
Dinova N: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo
Todorova Y: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo [ORCID]
Lyubomirova V: Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia, Bulgaria; Trace Analysis Laboratory, Faculty of Chemistry and Pharmacy, Sofia University “St. Kliment Ohridski, 1 James Bourchier Bl
Mihaylova V: Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia, Bulgaria; Trace Analysis Laboratory, Faculty of Chemistry and Pharmacy, Sofia University “St. Kliment Ohridski, 1 James Bourchier Bl
Daskalova E: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria
Lincheva S: Municipal Enterprise for Waste Treatment, Locality Sadinata, 1805 Yana, Bulgaria
Topalova Y: Department of General and Applied Hydrobiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Clean & Circle Center of Competence, Sofia University “St. Kliment Ohridski”, 15 Tsar Osvobo
Journal Name
Processes
Volume
10
Issue
3
First Page
460
Year
2022
Publication Date
2022-02-24
ISSN
2227-9717
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PII: pr10030460, Publication Type: Journal Article
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LAPSE:2023.2697
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https://doi.org/10.3390/pr10030460
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