| Title | Assessment of Denitrification and Nitrification Processes during Landfill Leachate Treatment |
|---|---|
| ID_Doc | 19495 |
| Authors | Schneider, I; Yotinov, I; Dinova, N; Geneva, B; Daskalova, E; Lincheva, S; Topalova, Y |
| Title | Assessment of Denitrification and Nitrification Processes during Landfill Leachate Treatment |
| Year | 2023 |
| Published | Processes, 11.0, 10 |
| Abstract | Landfill leachate is generated from waste degradation in landfill sites, and its treatment includes biological or combined treatment with physico-chemical methods. A frequently applied technology in the biological stage of landfill leachate treatment plants is based on denitrification and nitrification. Nevertheless, with the availability of a huge number of scientific reports, the management of denitrification and nitrification (D/N) processes in the frame of real wastewater treatment plants (WWTPs) is rather difficult and always remains a critical technological problem. This study aims to perform a comparative assessment between denitrification and nitrification processes during landfill leachate treatment in three different situations in the WWTP of the Municipal Enterprise for Waste Treatment in Sofia City, Bulgaria. The comparative assessment is based on the biotransformation effectiveness of ammonium ions in the course of nitrification and of nitrates in the course of denitrification. Mixed samples (wastewater and activated sludge) were taken from the sequencing batch reactors operating in the mode of denitrification and nitrification. All physico-chemical (pH, dissolved oxygen, organics concentration, BOD5:COD, nitrogen and phosphorous) and biological (sludge volume index, sludge biotic index, quantity of aerobic heterotrophs, denitrifiers and nitrifiers, total dehydrogenase activity) indicators were investigated in the samples from the biobasins in the mode of denitrification and nitrification. The conditions for the implementation of the two processes were compared, along with the state of the activated sludge in the different reactors. The obtained results showed that denitrification was the critical process in the technology on the base of D/N. A major factor that managed the denitrification was the lower concentration of biodegradable organic matter which led to a deformation of the activated sludge structure, a decrease in the count of heterotrophic microorganisms, a decrease in the total activity of the activated sludge and an inhibition of the nitrate reductase activity. The nitrification processes were accomplished with high intensity. The results confirmed that D/N could be optimized and controlled using specific wastewater treatment technology parameters and purposely applied indicators. |
| https://www.mdpi.com/2227-9717/11/10/2960/pdf?version=1697103170 |
Similar Articles
| ID | Score | Article |
|---|---|---|
7040
|
Xiong, JY; Zheng, Z; Yang, XY; He, P; Luo, XZ; Gao, B Mature landfill leachate treatment by the MBBR inoculated with biocarriers from a municipal wastewater treatment plant(2018) | |
| 15484
|
Zhang, FZ; Ren, S; Liang, HR; Wang, ZZ; Yan, Y; Wang, JH; Peng, YZ Organics Recovery from Waste Activated Sludge In-Situ Driving Efficient Nitrogen Removal from Mature Landfill Leachate: An Innovative Biotechnology with Energy Superiority(2024) | |
| 26735
|
Peng, W; Pivato, A; Cerminara, G; Garbo, F; Raga, R Denitrification of Mature Landfill Leachate with High Nitrite in Simulated Landfill Columns Packed with Solid Digestate from Organic Fraction of Municipal Solid Waste(2020)Waste And Biomass Valorization, 11, 2 | |
| 18113
|
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(2022)Processes, 10, 3 | |
| 10943
|
Kasinski, S; Debowski, M; Tylus, G; Rudnicki, M Characteristics of Wastewater from Municipal Waste Bio-Drying and Its Impact on Aquatic Environment-Long-Term Research on a Technical Scale(2022)Energies, 15, 24 | |
| 12501
|
Ribera-Pi, J; Badia-Fabregat, M; Espí, J; Clarens, F; Jubany, I; Martínez-Lladó, X Decreasing environmental impact of landfill leachate treatment by MBR, RO and EDR hybrid treatment(2021)Environmental Technology, 42.0, 22 | |
| 14686
|
Irka, CI; Prudent, P; Théraulaz, F; Farnet Da Silva, AM; Asia, L; Gori, D; Vassalo, L; Durand, A; Demelas, C; Höhener, P; Wong-Wah-Chung, P Treatment of Sewage Sludge Compost Leachates on a Green Waste Biopile: A Case Study for an On-Site Application(2022)Processes, 10, 6 |