Optimisation of micro-processes for shear-assisted solid–liquid separation in a rotatory batch flow vortex reactor
| Autor: | Benjamin Oyegbile, Satyanarayana Narra, Peter Ay |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Chromatography
Materials science Filtration and Separation Rotational speed 02 engineering and technology 010501 environmental sciences Residence time (fluid dynamics) 01 natural sciences Dewatering Vortex law.invention Sieve 020401 chemical engineering law Agglomerate Particle 0204 chemical engineering Composite material Suspension (vehicle) 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Journal of Water Reuse and Desalination. 6:125-136 |
| ISSN: | 2408-9370 2220-1319 |
| Popis: | This paper reports the study of micro-processes in a novel pre-treatment technique using a pellet forming batch flow vortex reactor of cylindrical shape that consists of axially revolving rotor plates between fixed stator plates. The suspension was first mixed with high molecular weight synthetic polymers by stirring for approximately 50 seconds and then agitated for 20 minutes. The process was optimised for a number of operating conditions including polymer type and dosing regimen, rotation speed, wall-plate gap distance, residence time and suspension filling method. The results of the investigation show that optimising a number of process variables that influence floc formation and growth, along with specific apparatus construction and geometry, help to maintain the suspension in a metastable state that is crucial for the formation of pellet-like compact agglomerates with better dewaterability and uniform aggregate size. A maximum dry solids content of 28.3% after gravity dewatering through a 0.5 mm sieve was recorded during the investigation, with a maximum particle removal efficiency of 97.5%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|