tag:blogger.com,1999:blog-22688605.post115472086608545024..comments2024-08-28T08:03:33.454-04:00Comments on Res-Kem Blog: What is an Empty Bed Contact Time (EBCT)?T Dupnikhttp://www.blogger.com/profile/09285312790633577918noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-22688605.post-25560451597704866522013-11-26T19:00:33.417-05:002013-11-26T19:00:33.417-05:00Okay I understand the math. So are we saying that ...Okay I understand the math. So are we saying that if my water flow is 1.5 GPM, does that volume of water moving have to touch the medium for the calculated time to be efficient?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22688605.post-59679002276265718302011-06-15T13:22:33.047-04:002011-06-15T13:22:33.047-04:00how to calculate define area of carbon or sand fil...how to calculate define area of carbon or sand filters, is this formula compatible for all type of filtersAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-22688605.post-83046286071542065772009-03-18T16:07:00.000-04:002009-03-18T16:07:00.000-04:00I wasn't sure if I should use the entire vessel vo...I wasn't sure if I should use the entire vessel volume or the bed volume, but you cleared it up. Thanks!Doughttps://www.blogger.com/profile/11278066245575875506noreply@blogger.comtag:blogger.com,1999:blog-22688605.post-41865098593208887752008-08-22T12:31:00.000-04:002008-08-22T12:31:00.000-04:00Since I posted this definition of Empty Bed Contac...Since I posted this definition of Empty Bed Contact Time for carbon filters, I have been receiving many comments on how to calculate. From my engineering courses (too many years ago for my liking), all you need is to get the units right and the answer is correct. In this case we want to end up with minutes as the EBCT. <BR/><BR/>So, <BR/>EBCT=V x C/Q where:<BR/>V is volume of carbon generally cubic feet or cubic meters<BR/><BR/>Q is flow rate of system generally gallons/minute, cubic meters/hr, or liters/minute <BR/><BR/>C is conversion factor. It is only needed to make the answer come out to minutes.<BR/><BR/>The metric system does not help too much. More than likely you will still need a conversion factor. For example, if you have a carbon volume of 3 cubic meters and a flow of 30 cubic meters/hr your EBCT=0.1 hour. In order to make the EBCT to be in minutes, you need a conversion factor of 60 minutes=1 hour. Therefore, the EBCT=6 minutes.T Dupnikhttps://www.blogger.com/profile/09285312790633577918noreply@blogger.comtag:blogger.com,1999:blog-22688605.post-37705718497265908372008-08-18T20:38:00.000-04:002008-08-18T20:38:00.000-04:00how about if we want to calculate in SI unit? do w...how about if we want to calculate in SI unit? do we still need C conversion? ThanksAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-22688605.post-65906593100272406052008-07-24T00:01:00.000-04:002008-07-24T00:01:00.000-04:00Ahh the joys of using the metric system....Ahh the joys of using the metric system....Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22688605.post-11977411094512909152008-02-15T14:40:00.000-05:002008-02-15T14:40:00.000-05:00Actually, 7.48gal/cubic ft = 7.48 and the the reas...Actually, 7.48gal/cubic ft = 7.48 and the the reason for C is that V is in cubic feet and Q is in gallons. Because these are two different measurements for volume, the conversion factor is needed for an EBCT in minutes.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22688605.post-58961880451633137172008-01-22T09:35:00.000-05:002008-01-22T09:35:00.000-05:00thxs for posting EBCTBut how did you get conversio...thxs for posting EBCT<BR/><BR/>But how did you get conversion factor, which you shown 7.48 gal/cubic ft. <BR/><BR/>Because, 7.48 gal/cubic ft = 1.0001=1<BR/><BR/>so whts meaning of conversionj factor to consider, and if, in which case?<BR/><BR/>thxsAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-22688605.post-1156528213936184032006-08-25T13:50:00.000-04:002006-08-25T13:50:00.000-04:00Wow...this is almost like rocket science! Thanks ...Wow...this is almost like rocket science! Thanks for the info.Anonymousnoreply@blogger.com