THE METHOD OF DENSITY DETERMINATION OF POST-COAGULATION SEDIMENT WITH THE USE OF X-RAY MIVROTOMOGRAPHY
Keywords:
coagulation, density determination, X-ray tomography.Abstract
In this paper computed tomography was applied to determine the density of sediments from the water treatment process. Coagulation process caused the destabilisation of the dispersion, and particles had different shapes, sizes and structures. The density of particles had an impact on the settling velocity and is very difficult to be described mathematically. This article presents the method of X-ray microtomography (XMT) application for dried and pressed sediment. The sample volume was obtained through X-ray and image processing. The correct determination of the sample volume depends on a correct number of thresholds. The image processing was performed with the use of the LabVIEW environment and the Vision module. The paper presents the results of tests and boundary parameters for the pressing and image process.
Downloads
References
2. Zemmouri H, Drouiche M, Sayeh A, Lounici H, Mameri N 2012 Coagulation Flocculation Test of Keddara's Water Dam Using Chitosan and Sulfate Aluminium Procedia Engineering 33 254–260.
3. Kowal L. A, Њwiderska-Brуї M 1997 Water Treatment PWN 115-117.
4. Orzechowski Z., Prywer J., Zarzycki R.: 2009 Fluid mechanics in protection and environmental engineering, Wydawnictwo Naukowo-Techniczne, Warsaw
5. Xu Y, Chen T, Ciu F, Shi W2016 Effect of reused alum-humic-flocs on coagulation performance and floc characteristics formed by aluminum salt coagulants in humic-acid water Chemical Engineering Journal 287 225–232. 6. – С. 38-40.
6. Tzoupanos N.D, Zouboulis A.J 2008 Coagulation-flocculation processes in water/waste water treatment: The application of new generation of chemical reagents, 6th IASME/WSEAS International Conference on Heat Transfer, Thermal Engineering And Environment (HTE'08) Rhodes, Greece, August 20-22.
7. Saritha V, Srinivas N, Srikanth Vuppala N. V 2015Analysis and optimization of coagulation and flocculation process. Appl. Water Sci.
8. Omelia C 1998 Coagulation and sedimentation in lakes, reservoirs and water treatment plants Water Science and Technology 37/129.
10. Ganser G. H 1993 A rational approach to drag prediction of spherical and non-spherical particles Powder Technology 77 143-152.
11. Haider A, Levenspiel O 1989 Drag coefficient and terminal velocity of spherical and nonspherical particles Powder Technology 58 63-70.
12. Tomiyama A 1998 Struggle With Computational Bubble Dynamics, Third International Conference on Multiphase Flow, ICMF`98, Lyon France June 8-12.
13. Ives K. J. 1961 New concepts in filtration. Water and Water Engineering 8.
14. Kelkar S, Boushey C.J, Okos M 2015a method to determine the density of food using X-ray imaging J. Food Eng., 159 36-41.
15. Elgelhardt L. T 2010 Coagulation, Flocculation and Clarification of Drinking Water, Engelhardt 5-6.
16. Rz№sa R. M, Podgуrni E 2014 Investigation of the effects of salinity and temperature on the removal of iron from water by aeration, filtration and coagulation Pol. J. Environ. Stud. 6 2157-2151.