The best location for the application of static magnetic fields based on biokinetic coefficients in complete-mix activated sludge process.

Autor: Asgari G; Social Determinants of Health Research Center (SDHRC), Faculty of Public Health, Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran., Seid-Mohammadi A; Department of Environmental Health Engineering, School of Public Health, Research Centre for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran., Shokoohi R; Department of Environmental Health Engineering, School of Public Health, Research Centre for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran., Samarghandi MR; Department of Environmental Health Engineering, School of Public Health, Research Centre for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran., Diger GT; Department of Civil and Environmental Engineering, University of Michigan, 177 EWRE Building, 1351 Beal Street, Ann Arbor, MI, 48109, USA., Malekolkalami B; Department of Physics, University of Kurdistan, Sanandaj, 66177-15175, Iran., Khoshniyat R; Social Determinants of Health Research Center (SDHRC), Faculty of Public Health, Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran. r.khoshniyat@edu.umsha.ac.ir.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Mar 29; Vol. 13 (1), pp. 5091. Date of Electronic Publication: 2023 Mar 29.
DOI: 10.1038/s41598-023-32285-1
Abstrakt: The use of the kinetic coefficients for the mathematical expression of the biochemical processes and the relationship between the effective parameters is importance. Change of the biokinetic coefficients in the complete-mix activated sludge processes were calculated for 1 month operation of the activated sludge model (ASM) in a Lab-scale in three series. 15 mT intensity of static magnetic fields (SMFs) applied on the aeration reactor (ASM 1), clarifier reactor (ASM 2) and, sludge returning systems (ASM 3) for 1 h, daily. During the operation of the systems, five basic biokinetic coefficients such as maximum specific substrate utilization rate (k), heterotrophic half-saturation substrate concentration (K s ), decay coefficient (k d ), yield coefficient (Y) and, maximum specific microbial growth rate (μ max ) were determined. The rate of k (g COD/g Cells.d) in ASM 1 was 2.69% and, 22.79% higher than ASM 2 and, ASM 3. The value of K s (mg COD/L) was 54.44 and, 71.13 (mg/L) lower than the ASM 2 and, ASM 3. The rate of k d ASM 1, ASM 2 and, ASM 3 was 0.070, 0.054 and, 0.516 (d -1 ). The value of Y (kg VSS/kg COD) in ASM 1 was 0.58% and, 0.48% lower than ASM 2 and, ASM 3. The rate of μ max (d -1 ) in ASM 1 was 0.197, this value for ASM 2 and ASM 3 were 0.324 and 0.309 (d -1 ). Related to the biokinetic coefficients analyses the best location for the application of 15 mT SMFs was the aeration reactor, where the present of oxygen, substrate and, SMFs have the greatest impact on the positive changes of these coefficients.
(© 2023. The Author(s).)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje