>No. UV treatment does not alter the water chemically. Only energy >is added, which produces heat, resulting in a temperature rise in >the treated water/wvo. >Actually UV radiation must strike the organism to kill it. In this >process some of the radiation energy is absorbed by the organism and >other constituents in the medium surrounding the organisms. So if >sufficient dosage of UV reach the organisms water/wvo can be >disinfected. >The germicidal effect of UV energy is said to be associated with its >absorption by certain organic components essential for the >functioning of cells. Dissipation of energy by excitation causes >disruption of unsaturated bonds, particularly of the purines and >pyrimidines, and this leads to lethal biochemical changes in the >micro-organisms. However, I'm not sure of how UV would act on wvo >(especially its property of disrupting the unsaturated bonds should >be considered here). >Kavitha.
>However, I'm not sure of how UV would act on wvo (especially its >property of disrupting the unsaturated bonds should be considered >here). ... a chemical reaction, no? Keith > kirk <[EMAIL PROTECTED]> wrote:I suspect the uv will promote >chemical reactions. > >Kirk > >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] >Sent: Friday, February 14, 2003 8:07 PM >To: biofuel@yahoogroups.com >Cc: [EMAIL PROTECTED] >Subject: [biofuel] stockpiling wvo > > >As has been described, wvo becomes rancid after a short time in storage at >room temperature. This deterioration prevents it from being stockpiled for >long periods. The deterioration, I presume, is the result of bacteria >buildup with time. > >In water treatment, a uv lamp can be used effectively to remove coliform >bacteria, by placing the uv lamp in the line through which the water is >drawn >for use. Why couldn't bacteria in wvo be removed by similar uf treatment? >This could be done continuously, or semi continuously, by pumping a small >stream of wvo from the tank, drawing it from the tank bottom with a small >submersible pump and allowing the uv treated wvo to drop back into the top >of >the tank. Assume a 1000 gal tank. > >Alternatively, the wvo stream could be heated and returned to the tank. >Any >idea of what temperature and for how long the residence time through the >heater? Or would both heating and uv treatment be required? Comments? > >Glenn Ellis Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
