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| | | Supreme Being
Group: Forum Members
Last Login: 6/6/2008 4:03:33 PM
Posts: 101, Visits: 532 |
| | I am impressed by the breadth and depth of collective knowledge attracted to this forum. I do not know the process used to produce the biodiesel here (although it is a university project, so I'm sure with some digging I could probably source it.) The operators have been calling the bio-diesel by-product "glycerol". Our WWTP is located in a university town (30% of our winter population is made up of students). When the university goes on vacation, (i.e. spring break) the operators drip feed the glycerol into the plant to keep the food:microorganism ratio up. So when the students return (30% increase in loading over a 48 hour period) the microbes are up to the task. It's possible that feeding this "junk food" to the plant over a long period of time could contribute to increased nocardia and all it's inherent foaming problems. But in the short term, the microbes seem to enjoy junk food. I look forward to learning more on the treatment of this waste. I have deep reservations whether the continued production of smog and subsequent load on our food resources is going to be a good thing for our environment as a whole. But that's another thread. G |
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| | | Forum Newbie
Group: Forum Members
Last Login: 11/26/2007 9:19:36 AM
Posts: 3, Visits: 5 |
| | We have a paper on treating biodiesel wastewater, please visit http://proceedings.itb.ac.id/indeks.php?li=article_detail_id&id=242 although it is written in Bahasa Indonesia. You may guess the wastewater characteristics from the Tabel 1. BOD = 65 689 ppm with COD = 152 079 ppm and high TDS = 24 454 mg/L. Regards, Tjandra Setiadi, Ph.D (Mr.)
Tjandra Setiadi, Ph.D.
Department of Chemical Engineering, ITB
Bandung, Indonesia |
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| | | Forum Newbie
Group: Forum Members
Last Login: 2/3/2008 10:56:42 AM
Posts: 1, Visits: 1 |
| | Hi I would be happy to have more details about it, Idan |
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| | | Forum Newbie
Group: Forum Members
Last Login: 6/4/2008 11:08:17 AM
Posts: 3, Visits: 8 |
| I am looking for technologies and users of equipment to concentrate fats, oils and grease from restaraunts to be used as a feed stock for anaerobic digestion. Is this something that may be applicable.
Ken Fonda, PE
Brown and Caldwell
858-571-6749 direct line
858-514-8833 fax
858-349-6106 cell |
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| | | Supreme Being
Group: Forum Members
Last Login: 5/17/2008 12:28:05 PM
Posts: 247, Visits: 3,171 |
| | I, also, am very interested in anaerobic digestion processes applied to bio-diesel residuals. More specifically, the glycerol bearing water phase. People seem to think that a use will be found for this by product. My own view is: it's a low value material that's going to be even lower in value once the bio-diesel train starts really rolling; an inevitable consequence of skyrocketing oil prices. My notion is that the best thing to do with it is to use it on site as a feedstock for bio-gas generation. There are problems with this. Glycerol seems to work well as a supplement to traditional bio-gas feedstocks, like manure, but there's limits to how much can be used. Too much appears to suppress methane production. http://www.dedalusenviro.com
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