Supercritical Fluid Extraction Search Engine - Infinity Supercritical CO2 Extraction Publications Search Engine - Cannabis Industry - Publications On Demand - Real Time Browser Display
This SDR - Spinning Disc Reactor and Cavitation Reactor search was updated real-time via Filemaker on:SDR - Spinning Disc Reactor and Cavitation Reactor Contents List
Search Completed. Publication Name:
Page Number: 001
| PDF Text:|
Ultrasonics Sonochemistry 10 (2003) 255–264
Hybrid cavitation methods for water disinfection: simultaneous use of chemicals with cavitation
K.K. Jyoti, A.B. Pandit *
Chemical Engineering Division, Department of Chemical Technology, University of Mumbai, Matunga, Mumbai 400019, India
Received 7 October 2002; accepted 10 March 2003
This study brings out the potential efficacy of hybrid techniques for water disinfection. The techniques studied include, hydro- dynamic cavitation, acoustic cavitation and treatment with chemicals such as ozone and hydrogen peroxide. The phenomena of cavitation which involves formation, growth and violent collapse of vapor bubbles in a liquid media is known to generate a high intensity pressure which affects the cell and microorganism viability. The hybrid technique which combines hydrodynamic cavi- tation, acoustic cavitation, hydrogen peroxide and/or ozone appears to be an attractive alternative to a single technique for the reduction in the heterotropic plate count bacteria as well as indicator microorganisms like the Total coliforms, Fecal coliforms and Fecal streptococci.
Ó 2003 Elsevier Science B.V. All rights reserved.
Keywords: Disinfection; Cavitation; Hydrogen peroxide; Ozone; Heterotropic plate count bacteria; Indicator microorganisms
A variety of physical and chemical techniques are routinely used for potable water disinfection including chlorination , ozonation  and ultraviolet light . Hybrid techniques employ the combination of various oxidation techniques, which can result in the generation of sufficient hydroxyl radicals and their oxidizing po- tential for water purification. These processes are known as the advanced oxidation processes (AOP) . The OH radical is a powerful oxidizing radical, second only to fluorine  and is therefore appealing in its use for water treatment. Advanced oxidation systems generally com- bine ozone, hydrogen peroxide and ultraviolet radiation e.g. O3 and H2O2, O3 and UV, and H2O2 and UV.
A number of hybrid techniques have been reported in the literature which include the combination of UV radiation and ozonation for the treatment of humic acids  and low molecular weight organic compounds , combination of ultrasonication and ozonation for aromatic compound degradation , inactivation of
* Corresponding author. Tel.: +91-22-414-5616; fax: +91-22-414- 5614.
E-mail address: firstname.lastname@example.org (A.B. Pandit).
microorganisms  and disinfection of water . The advanced oxidation process (PEROXONE) which is a combination of ozone and hydrogen peroxide has been used for disinfection of water .
However, chemical disinfection techniques suffer from disadvantages like formation of possibly carcinogenic byproducts . Therefore there is a need for developing additional disinfection processes, which could eliminate or reduce the use of these disinfecting chemicals.
In this article we investigate the viability of ultra- sonication, hydrodynamic cavitation and hybrid cavi- tation processes involving the use of chemicals like hydrogen peroxide and ozone along with cavitation. Previous studies have indicated that these techniques can inactivate a wide range of microorganisms and ultrasonication  and hydrodynamic cavitation  which are essentially different means of generating cavi- tating conditions i.e. using sound and flow energies respectively, have been particularly useful for cell dis- ruption. Cavitation is a phenomena of formation, growth and collapse of microbubbles within a liquid. If this phenomena occurs due to the passage of high fre- quency sound waves then it is called acoustic cavitation (ultrasonication) and if it occurs due to the pressure variations in the flowing liquid due to the change in the
1350-4177/03/$ - see front matter Ó 2003 Elsevier Science B.V. All rights reserved. doi:10.1016/S1350-4177(03)00095-6
|SUPERCRITICAL CO2 EXTRACTOR FOR SALE: 5L, 10L and 20L - 2,000 psi Complete Supercritical Fluid Extraction System - closed loop. Our systems are made at our fabrication shop in the state of Washington. Systems available: 5L, 10L, 20L, 100L, and larger custom. Typical build time is 2 weeks. This is not a Apeks Supercritical or Waters Supercritical CO2 Fluid Extraction System. We believe it is a better system, since we use 1/2 inch tubing for the CO2 flow, which is 4 times the flow rate of a Apeks, and up to 64 times the flow rate of a Waters system. We believe the result is faster processing time and better yield from increased exposure to CO2 solvent. Perfect for extraction of terpenes, trichomes, and Cannabinoids. Supercritical CO2 Fluid Extraction is a art, and the operator must have experience and training to obtain results. Go to website|
Search Engine Contact: email@example.com