Emulsification followed by freezing and thawing cycles was applied to produce poly(vinyl alcohol) (PVA) microparticles and to simultaneously immobilize activated sludge. Activity of the obtained microparticles (similar to 400 mu m in diameter) was evaluated in glucose syrup solutions and heat-pretreated wastewater from a starch factory by measurements of permanganate index (COD (Mn) ) reduction. The reaction followed first-order kinetics, revealing slight mass transfer limitations in PVA microparticles as determined from the kinetic rate constant that was similar to 35% lower than that in the freely suspended activated sludge culture. Yet, efficiency of the microparticles increased almost five-fold in a laboratory airlift bioreactor operating either in batch or continuous regimes. Over 19 days of operation under high organic loadings in the industrial wastewater (similar to 100 kgCOD m(-3) d(-1)), PVA microparticles (12.4% volume fraction) remained active and induced a decrease of over... 90% of biodegradable COD (Mn) at the hydraulic retention time of 8 h.
TY - JOUR
AU - Cvetković, Slobodan
AU - Bugarski, Branko
AU - Obradović, Bojana
PY - 2018
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3988
AB - Emulsification followed by freezing and thawing cycles was applied to produce poly(vinyl alcohol) (PVA) microparticles and to simultaneously immobilize activated sludge. Activity of the obtained microparticles (similar to 400 mu m in diameter) was evaluated in glucose syrup solutions and heat-pretreated wastewater from a starch factory by measurements of permanganate index (COD (Mn) ) reduction. The reaction followed first-order kinetics, revealing slight mass transfer limitations in PVA microparticles as determined from the kinetic rate constant that was similar to 35% lower than that in the freely suspended activated sludge culture. Yet, efficiency of the microparticles increased almost five-fold in a laboratory airlift bioreactor operating either in batch or continuous regimes. Over 19 days of operation under high organic loadings in the industrial wastewater (similar to 100 kgCOD m(-3) d(-1)), PVA microparticles (12.4% volume fraction) remained active and induced a decrease of over 90% of biodegradable COD (Mn) at the hydraulic retention time of 8 h.
PB - Korean Institute Chemical Engineers, Seoul
T2 - Korean Journal of Chemical Engineering
T1 - Activated sludge-loaded polyvinyl alcohol microparticles for starch wastewater treatment in an airlift bioreactor
EP - 327
IS - 2
SP - 324
VL - 35
DO - 10.1007/s11814-017-0313-9
ER -
@article{
author = "Cvetković, Slobodan and Bugarski, Branko and Obradović, Bojana",
year = "2018",
abstract = "Emulsification followed by freezing and thawing cycles was applied to produce poly(vinyl alcohol) (PVA) microparticles and to simultaneously immobilize activated sludge. Activity of the obtained microparticles (similar to 400 mu m in diameter) was evaluated in glucose syrup solutions and heat-pretreated wastewater from a starch factory by measurements of permanganate index (COD (Mn) ) reduction. The reaction followed first-order kinetics, revealing slight mass transfer limitations in PVA microparticles as determined from the kinetic rate constant that was similar to 35% lower than that in the freely suspended activated sludge culture. Yet, efficiency of the microparticles increased almost five-fold in a laboratory airlift bioreactor operating either in batch or continuous regimes. Over 19 days of operation under high organic loadings in the industrial wastewater (similar to 100 kgCOD m(-3) d(-1)), PVA microparticles (12.4% volume fraction) remained active and induced a decrease of over 90% of biodegradable COD (Mn) at the hydraulic retention time of 8 h.",
publisher = "Korean Institute Chemical Engineers, Seoul",
journal = "Korean Journal of Chemical Engineering",
title = "Activated sludge-loaded polyvinyl alcohol microparticles for starch wastewater treatment in an airlift bioreactor",
pages = "327-324",
number = "2",
volume = "35",
doi = "10.1007/s11814-017-0313-9"
}
Cvetković, S., Bugarski, B.,& Obradović, B.. (2018). Activated sludge-loaded polyvinyl alcohol microparticles for starch wastewater treatment in an airlift bioreactor. in Korean Journal of Chemical Engineering
Korean Institute Chemical Engineers, Seoul., 35(2), 324-327.
https://doi.org/10.1007/s11814-017-0313-9
Cvetković S, Bugarski B, Obradović B. Activated sludge-loaded polyvinyl alcohol microparticles for starch wastewater treatment in an airlift bioreactor. in Korean Journal of Chemical Engineering. 2018;35(2):324-327.
doi:10.1007/s11814-017-0313-9 .
Cvetković, Slobodan, Bugarski, Branko, Obradović, Bojana, "Activated sludge-loaded polyvinyl alcohol microparticles for starch wastewater treatment in an airlift bioreactor" in Korean Journal of Chemical Engineering, 35, no. 2 (2018):324-327,
https://doi.org/10.1007/s11814-017-0313-9 . .
