Aquaponics Digest - Mon 05/10/99
Message 1: Re: ADM's web page
from james.rakocy@uvi.edu (James Rakocy, Ph.D.)
Message 2: Tilapia
from dfranks@principia.edu (Doug Franks)
Message 3:
from JOYCE DEMING
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Subject: Re: ADM's web page
From: james.rakocy@uvi.edu (James Rakocy, Ph.D.)
Date: Mon, 10 May 1999 15:06:34 -0400 (AST)
I don't think they are linked. They are using a greenwater tank culture
system to raise tilapia similar to the system being used by about five
commercial producers in Luoisiana. So they are promoting algae growth,
contrary to what one would do to raise valuable hydroponic plants. Bead
filters take out solids. I've asked many people about this operation, even
the manager, and never got a real straight answer. Jim R.
>Yes it is a lot of lettuce. They have about ten acres under greenhouse at
>the Decatur location. The lettuce is planted and harvested in one area.
>CO2 is added to the greenhouse from the fermentation process in the alcohol
>production plant. The seedlings are placed in trays and moved on a rail
>system to the growing area. The mature plants are harvested about 27 days
>later. Lighting is used to supplement low light conditions in order to keep
>an even amount of produce moving through the plant all year round. I don't
>know if they are using the fish wastes in the same manner in aquaponics.
>I had contact with one of the people in the aquaculture department and he
>had no idea what was going on in the hydroponics section. At a guess I
>think they may be collecting the fish wastes, composting them and using the
>compost tea with added nutrients in the hydroponics section. They did not
>use a medium to hold the plants when I was there. The plants where placed
>in
>plastic slats and the roots where placed in nutrient solution. There is a
>constant flow of nutrient solution through the trays. They get very
>secretive about sharing their information so I don't know what they are
>doing for sure. I make my guesses on what I have seen them do in the past
>and what they are set up to do.
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Subject: Tilapia
From: dfranks@principia.edu (Doug Franks)
Date: Mon, 10 May 1999 23:10:21 -0400 (EDT)
I would like to see some Tilapia being raised. Where can I go? I am
located near Philadelphia.
Douglas Franks
1000 Forty Foot Rd
Lansdale, PA 19446
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Subject:
From: JOYCE DEMING
Date: Tue, 11 May 1999 04:38:08 +0000
>Ted wrote:
>
>>Another compound that is produced by some of the blue greens is.....O.K. I
>>am pulling this out of the sludge pit of old biochemistry memories...is it
>>Bornane?..IsoBornane?...Boron?....Borneo?...Ernest
>>Borgnine?...Nope...Sorry....Nevermind.....
The other compound is probably methyl isoborneol (MIB). I believe both
geosmin and MIB are the primary taste and odor compounds found in fish
flesh. I know Actinomycetes are a major source of these compounds, but I
don't remember which algae produce these cmpds.
Vic Hahn
S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124
Web page http://www.townsqr.com/snsaqua/
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