TY - GEN
T1 - Optimization of activated sludge physical properties by magnetic field via response surface modeling
AU - Nur Syamimi, Zaidi
AU - Muda, Khalida
AU - Sohaili, Johan
AU - Sillanpää, Mika
PY - 2014
Y1 - 2014
N2 - In this study, activated sludge was exposed by magnetic field exhibited from NdFeB - type of permanent magnets. The exposure was aimed to improve the physical properties of the activated sludge used in treating wastewater. Hence, it was hypothesized that the magnetically-exposed activated sludge is potential in enhancing the efficiency of removal performances of the wastewater treatment processes. The influence of magnetic field, exposure time, biomass concentration and mixing intensity on turbidity reduction, aggregation and settling velocity was thoroughly investigated. Response surface methodology (RSM) was applied for experimental design, analysis and optimization. Based on the results, magnetically-exposed activated sludge displayed certain trends showing that its properties were positively affected by magnetic field. At the optimum conditions of magnetic field of 88.0 mT, exposure time of 38.5 hrs, biomass concentration of 3380 mg/L and mixing intensity of 345 rpm achieved 68.3%, 60.1% and 0.0104 cm/s of turbidity reduction, aggregation and settling velocity, respectively.
AB - In this study, activated sludge was exposed by magnetic field exhibited from NdFeB - type of permanent magnets. The exposure was aimed to improve the physical properties of the activated sludge used in treating wastewater. Hence, it was hypothesized that the magnetically-exposed activated sludge is potential in enhancing the efficiency of removal performances of the wastewater treatment processes. The influence of magnetic field, exposure time, biomass concentration and mixing intensity on turbidity reduction, aggregation and settling velocity was thoroughly investigated. Response surface methodology (RSM) was applied for experimental design, analysis and optimization. Based on the results, magnetically-exposed activated sludge displayed certain trends showing that its properties were positively affected by magnetic field. At the optimum conditions of magnetic field of 88.0 mT, exposure time of 38.5 hrs, biomass concentration of 3380 mg/L and mixing intensity of 345 rpm achieved 68.3%, 60.1% and 0.0104 cm/s of turbidity reduction, aggregation and settling velocity, respectively.
KW - Activated sludge
KW - Magnetic field
KW - Physical properties
KW - RSM
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=84903546624&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.567.98
DO - 10.4028/www.scientific.net/AMM.567.98
M3 - Conference contribution
AN - SCOPUS:84903546624
SN - 9783038351238
T3 - Applied Mechanics and Materials
SP - 98
EP - 103
BT - Structural, Environmental, Coastal and Offshore Engineering
PB - Trans Tech Publications Ltd
ER -