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| 1 | The Use of Ultrasonics in the Treatment of Waste Activated Sludge显示文摘The present paper reports on extensive investigations using an ultrasonic treatment of WAS, to study its po-tential to meet one or all of four objectives: (1) reduce WAS quantities; (2) achieve a better dewaterability; (3) provoke a release of COD from the biosolids, preferably transformed into biodegradable organics and (4) possibly destroy the fila-mentous micro-organisms responsible for sludge bulking. The experiments are carried out in a batch reactor of volume up to 2.3L. The ultrasonic apparatus consisted of a generator, a converter and a sonotrode, supplied by Alpha Ultrasonics under the brand name of Telsonic. Three different sludge kinds were tested, at approximate concentration (DS/WAS) be-tween 3.5 and 20g·L-1. The release of COD from the WAS-phase into the filtrate phase is a function of the specific en-ergy-input SE with yields of about 30% achievable at SE-values of 30000 kJ·kg-1. A major fraction of the COD is trans-formed into biodegradable organics (BOD). The reduction of DS-fraction of the sludge is equivalent to the COD-release rates. Although the dry solids content (DS) is reduced, the dewaterability of the sludge is not improved. This reflects itself in a slightly decreased dryness of the filter cake using vacuum filtration, and in increased values of the capillary suction time (CST). This more difficult dewaterability is the result of considerably reduced floc sizes, offering an extended sur-face area. More surface water is bound (CST increases) and the filterability decreases due to clogging of the cake. To reach the same dryness as the untreated cake, the required dosage of poly-electrolyte increases proportionally with the level of ultrasound energy supplied. The ultrasonic reduction of filamentous WAS organisms is not conclusive and very little effect is seen at low intensities and short treatment durations. Microscopic analysis of the WAS identified the domi-nant presence of Actynomyces. Especially the release of COD and its transformation into BOD certainly merit further re-search. | Raf Dewil Jan Baeyensa Rebecca Goutvrind | 2006 | Chinese Journal of Chemical Engineering2006，14，1： | 21 |
| 2 | CFB cyclones at high temperature:Operational results and design assessment显示文摘Pressure drop and cut size measurements are reported for a full scale cyclone operating within a 58 MWth CFB-combustor unit at 775℃.The paper reviews the vast number of equations to calculate the pressure drop and separation efficiency of cyclones,generally for operation at ambient temperature and at low Cs <0.5 .None of the literature correlations predicts the pressure drop with a fair accuracy within the range of experimental operating conditions.The cut size d50 can be estimated using direct empirical methods or using the Stokes number,Stk50.Both methods were used to compare measured and predicted values of d50.With the exception of Muschelknautz and Krambrock,none of the equations made accurate predictions.Finally,an alternative method to determine the friction factor of the pressure drop equation(Euler number,Eu) and of the cut size is proposed.The Eu number is determined from the geometry of common cyclones,and the derived value of Stk50 defines more accurate cut sizes.The remaining discrepancy of less than 5%,when compared with the measured values,is tentatively explained in terms of a reduced cyclone diameter due to the solids layer formed near its wall.Further measurements,mostly using positron emission particle tracking,elucidate the particle motion in the cyclone and both tracking results and the influence of the particle movement on Eu and Stk50 will be discussed in a follow-up paper. | Raf Dewil Jan Baeyens Bart Caerts | 2008 | Particuology2008，6，3： | 5 |
| 3 | Principles and potential of the anaerobic digestion of waste-activated sludge显示文摘 | Lise Appels Jan Baeyens Jan Degrève Raf Dewil | 2008 | Progress in Energy and Combustion Science2008，，6： | 4 |
| 4 | Particles in a circulation loop for solar energy capture and storage显示文摘This study defines and assesses the selection ciiteria for suitable particulate materials to be used in an upflow bubbling fluidized bed (UBFB) or dense up-flow powder circulation system for solar energy capture and storage. The main criteria identified are based on the thermophysical and thermomechanical properties, attrition behavior, and the considerations of health and environmental hazards of the candidate powders. Finally, a cost comparison and tentative ranking of the different can didate powders is presented in addition to a weighted scoring. Significant scoring differences can be observed between the various materials. Olivine possesses the most favorable characteristics and appears to be the particulate material of choice for solid/gas suspension heat transfer fluids. | Q. Kang G. Flamant R. Dewil J. Baeyens H.L. Zhang Y.M. Deng | 2019 | Particuology2019，17，2： | 3 |
| 5 | Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering显示文摘 | Elisabeth Neyens Jan Baeyens Raf Dewil Bart De heyder | 2003 | Journal of Hazardous Materials2003，，2： | 3 |
| 6 | Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering显示文摘 | Elisabeth Neyens Jan Baeyens Raf Dewil Bart De heyder | 2003 | Journal of Hazardous Materials2003，，2： | 2 |
| 7 | The distribution of heavy metals during fluidized bed combustion of sludge (FBSC)显示文摘 | Van de Velden Dewil M Baeyens R | 2008 | Journal of Hazardous Materials2008，151，1： | 1 |
| 8 | Advanced sludge treatment affects extracellular polymeric substances to improve activeated sludge dewatering 显示文摘 | Elisabeth Neyens Jan Baeyen Raf Dewil | 2004 | J Hazard Mater2004，106，23： | 1 |
| 9 | Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering 显示文摘 | Neyens E Baeyens J Dewil R | 2004 | Journal of Hazardous Materials2004，106，2： | 1 |
| 10 | The distribution of heavy metals during fluidized bed combustion of sludge (FBSC)显示文摘 | VELDEN DE V M DEWIL R BAEYENS J JOSSON L LANSSENS P | 2008 | Journal of Hazardous Materials2008，151，1： | 1 |
| 11 | Advanced Sludge Treatment Affects Extracellular Polymeric Substances to Improve Activated Sludge Dewatering显示文摘 | Neyens E Baeyens J Dewil R | 2004 | Journal of Hazardous Materials2004，106，： | 1 |
| 12 | Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering 显示文摘 | Neyens E Baeyens J Dewil R | 2004 | Journal of Hazardous Materials2004，106，： | 1 |
| 13 | Fluidized bed waste incinerators: Design, operational and environmental issues显示文摘 | J. Van Caneghem A. Brems P. Lievens C. Block P. Billen I. Vermeulen R. Dewil J. Baeyens C. Vandecasteele | 2012 | Progress in Energy and Combustion Science2012，，4： | 1 |
| 14 | Mieroglia in amyotrophic lateral sclerosis显示文摘 | Dewil M Van Den Bosch L Robberecht W | 2007 | Acta Neurol Belg2007，107，： | 1 |
| 15 | Inhibition of p38 mitogen activated protein kinase activation and mutant SOD1(G93A) induced motor neuron death显示文摘 | Dewil M dela Cruz V F Van Den Bosch L Robberecht W | 2007 | Neurobiol Dis2007，26，： | 1 |
| 16 | Advanced sludge treatment affects extracellular polymeric substances to improve activated sludge dewatering显示文摘 | NEYEN S E BAEYENS J DEWIL R | 2004 | Hazard Mat2004，106，23： | 1 |
| 17 | Astrocytes regulate glut2 expression in motor neurons and their vulnerability to excitotoxicity 显示文摘 | Van Damme P Bogaert E Dewil M | 2007 | Proc Natl Acad Sci U S A2007，104，14： | 1 |
| 18 | Ultrasonic Treatment of Waste Sludge: A Review on Mechanisms and Applications显示文摘 | Vinay Kumar Tyagi Shang-Lien Lo Lise Appels Raf Dewil | 2014 | Critical Reviews in Environmental Science and Technology2014，，11： | 1 |
| 19 | Fenton peroxidation improves the drying performance of waste activated sludge 显示文摘 | Dewil R Baeyens J Neyens E | 2005 | Journal of Hazardous Materials2005，117，23： | 1 |
| 20 | Fundamentals, kinetics and endothenlticity of the biomass pyrolysis reaction显示文摘 | VAN DE VELDEN M BAEYENS J BREMS A JANSSENS B DEWIL R | 2010 | Renew Energy2010，35，1： | 1 |
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