Aquaponics Digest - Sat 09/01/01
Message 1: Re: Aquaponics Digest - Fri 08/31/01
from marc
Message 2: Re: Specific Gravity of Algae - inclined plate settler
from pantryman 'at' empireone.net
Message 3: Re: Solviva Greenhouse type setup
from Carolyn Hoagland
Message 4: Re: Specific Gravity of Algae - inclined plate settler
from Mick
Message 5: inclined plate separators
from Carolyn Hoagland
Message 6: Re: Aquaponics journal?
from "Christopher S Weller"
Message 7: Fw: Green house heaters
from "Brent Bingham"
Message 8: Re: Solviva Greenhouse type setup
from "bennett"
Message 9: Helpful Links
from kris book
| Message 1
Subject: Re: Aquaponics Digest - Fri 08/31/01
From: marc
Date: Sat, 01 Sep 2001 00:00:42 -0600
That seems high. Maybe it's a misprint and should have read
200 fc??
> Subject: Lightsmith
> From: "Marc Laberge"
> Date: Fri, 31 Aug 2001 03:20:37 -0400
>
> Would anybody know what average foot-candle intensity is required for Boston
> lettuce? I just read that Gordon suggested 2000 at the plant level in his
> question and answers section of the aquaponics journal.
> Marc Laberge
> Mont Tremblant
> Quebec , Canada
>
| Message 2
Subject: Re: Specific Gravity of Algae - inclined plate settler
From: pantryman 'at' empireone.net
Date: Sat, 1 Sep 2001 09:49:25 -0500
An inclined plate settler coupled with a foam fractionator has worked well for us.Some pics can be found at our page: www.oneaccordfoodpantry.org
Bob
"TGTX" wrote:
>
> Carolyn and Company,
>
> The degree of intracellular gas vacuole development and lipid content ratio
> changes in cyanobacteria (blue green algae) is an adaptation or phylogenetic
> plasticity design characteristic that can result in the blue greens
> floating, ie, they become less dense in bulk volume than the density of
> water which is about 1 gram per cubic centimeter at ambient temps.
>
> The other algae, however, can be settled or centrifuged out because I think
> they are at about 1.15 to 1.20 g/cc
.but don't quote me cause that is
> just a SWAG that I seem to remember from some old tattered notebook
> Bear in mind that many flagellated species of microscopic unicellular green
> algae (Chlorophycophyta) can swim against gravity and pressure gradients or
> currents to a degree.
>
> Ever thought of inclined plate settlers?
>
> Ted
>
>
| Message 3
Subject: Re: Solviva Greenhouse type setup
From: Carolyn Hoagland
Date: Sat, 01 Sep 2001 11:09:41 -0500
Dawn,
A library or bookstore in your area should have some general books
about solar energy. I used to have a greenhouse in Indiana. I
designed it so that the Northern half was well insulated, and the
Southern Wall (double poly, inflated) was angled for maximum solar
gain in the Jan, Feb, March. It was also semi pit style and had a
concrete floor, so you'd think I had plenty of mass to absorb all that
heat. Alas, when the sun was really shining, the temp would go to
over 130 degrees if I didn't vent. And this was on cold clear days of
around 10-15 degrees. I had large passive vents all along the bottom
and top, but I still couldn't passively dump the heat fast enough to
keep from cooking the plants. It was really frustrating to have to
pay for electricity to blow all that heat *out* of the building! So
when the sun wasn't shining, I was still burning gas, just to keep it
at 45 degrees at night. (and you'll need to vent occasionally during
non sunshine hours, just to maintain air quality.) I didn't even try
to grow the warm season crops until March. I just ordered those pre
started 512 cell plug trays from Ball or Express Seed. Still, this
greenhouse performed better in terms of energy use than the standard
hoop style house. I think it was not so much because of the solar
gain (all greenhouses cook on sunny days), but because half of it was
insulated. At your latitude, you'll be losing heat 3/4 of the daily
cycle, even on your best days. You must not use Bolivian numbers
(even high altitude ones) as your model. Being near the equator, the
number of hours and intensity of sunshine will be very different from
what you'll be getting. Here's a map of US solar insolation.
http://prs.us.ohio-state.edu/~steen/sustain/solar_radiation_map.gif
I'm also really intrigued with the idea of these separately located
Solar Closets.
http://vu-vlsi.ee.vill.edu/~nick/solar/solar.html
The idea being that greenhouses and residences make poor heat
collectors because the people and plants cant tolerate the high temp
ranges need to store the heat efficiently. My experiences validate
this fellows theory.
I like the idea of combining animals and greenhouses, and I wonder how
well this would work. Omnivores like pigs might like the fish offal
and plant wastes. Animals need a fair amount of room to move around
in, other wise they pick on each other and get sick. In addition to
producing heat and carbon dioxide, they also add a lot of humidity to
the air (and you have to vent that or you get molds and wet cooties
and they get sick).
A good book is "You Can Farm" by Joel Salatin. He hasn't added fish
to his equations yet, but he is a good resource for combining plants
and animals in cycles and ways that are not traditional. He has a lot
to say about using deep bedding with animals inside.
Best wishes.
Carolyn Hoagland
| Message 4
Subject: Re: Specific Gravity of Algae - inclined plate settler
From: Mick
Date: Sat, 01 Sep 2001 11:31:47 -0500
pantryman 'at' empireone.net wrote:
> An inclined plate settler coupled with a foam fractionator has worked well for us.> Some pics can be found at our page: www.oneaccordfoodpantry.org
> Bob
>
--
Bob,
I read your site. You are an angel in human form. What a useful way to spend one's
lifetime, feeding the hungry and teaching them how to grow their own food. I wish I
lived closer so I could come and see your operation.
If I ever win the dang lottery, you folks get a huge chunk of it. Heroes
gotta love
'em.
Mick
| Message 5
Subject: inclined plate separators
From: Carolyn Hoagland
Date: Sat, 01 Sep 2001 11:46:30 -0500
Hi Ted,
I did a google search and found this good diagram.
http://www.parkson.com/NEWPROD_gewe_inclined_plate_clarifier.htm
I couldn't quite see where the gunk outlet is. I assume someplace
near the bottom?
Carolyn
| Message 6
Subject: Re: Aquaponics journal?
From: "Christopher S Weller"
Date: Fri, 31 Aug 2001 22:38:58 -0400
Thank You
phone 209-742-6869
fax 209-742-4402
journal 'at' aquaponics.com
riginal Message-----
| Message 7
Subject: Fw: Green house heaters
From: "Brent Bingham"
Date: Sat, 1 Sep 2001 16:21:48 -0700
Fred Durst works for my uncles farm supply business, where we get our
equipment. He said he would cut $ 1000.00 off the cost for any farm related
(non industrial )application we referred to them. The problem is the 350,000
Btu units sale for $ 9,150.00 list from the manufacturer. If you do heat it
will pay for itself in a very short time. Several companies will let you
lease purchase them and this will let your fuel savings help pay it off. We
try to get any used ones they hear about but there are non. There is only
one place that even makes the coil tube boiler that burns all of the oils.
The boiler people know that you can " shock " a boiler and pop a leak. the
coil tub type are very resistant to( farm help) damage.
Brent
----- Original Message -----
From: "Mark Lum"
To:
Sent: Saturday, September 01, 2001 10:54 AM
Subject: Re: Green house heaters
>
> Brent, sounds good. What would a small boiler cost me? Do you have any
> used units? What do you think the most efficient way to heat the fish
> grow-out tanks is? I'm thinking heat exchanger, but I would't want
anything
> directly in the water that contained lead (solder). Perhaps blowing the
air
> through a heat excanger then bubbling it under the water would heat and
> oxygenate the water? Feel free to post your response to the list, since
this
> is something that most everyone has to deal with. I'm a total newbie, so
I
> thank you again for your guidance.
> -Mark
>
> >From: "Brent Bingham"
> >To: "Mark Lum"
> >Subject: Re: Green house heaters
> >Date: Sat, 1 Sep 2001 08:18:43 -0700
> >
> >You can get by with 4 Btu's per cubic foot of interior space in the east
> >and
> >mid west. 3 Btu's will work in the west at lower altitudes. The exaust
gas
> >should be vented but you can run it through a heat exchanger. Yes Diesel
or
> >almost any liquid that burns with a flash point over 250 F will work.
> >Cooking oils, vegetable oils or almost any thing of this type also works.
> >My
> >personal choice is a boiler because it can be used in many more ways.
> >----- Original Message -----
> >From: "Mark Lum"
> >To:
> >Sent: Friday, August 31, 2001 6:04 PM
> >Subject: Re: Green house heaters
> >
> >
> > > Brent,
> > > We were talking about oil burners and you asked how big my greenhouse
> >is.
> > > Well, it doesn't exist yet, nor will it this year. After crunching
some
> > > numbers, I don't think I can do the scale of aquaponics I had hoped.
> >I'm
> > > going to do a small system in my basement, under lights, to experiment
> >with,
> > > then next spring see if I should expand.
> > >
> > > A greenhouse, If I go that route would only be about 2000-3000 square
> >feet.
> > > What heater would you recommend? Price? How much do these weigh
(I'd
> >need
> > > it shipped to PA)? Can regular heating oil or diesel fuel be burned in
> >it
> > > also? Thanks.
> > > -Mark
> > >
> > > >From: "Brent Bingham"
> > > >To: "Mark Lum"
> > > >Subject: Re: Green house heaters
> > > >Date: Sat, 25 Aug 2001 09:25:48 -0700
> > > >
> > > >Waste motor oil can have some things in it that you do not want to
> >breath.
> > > >Acid and other things are by products of internal combustion that
ends
> >up
> > > >in
> > > >the oil.
> > > >We put our green houses on the ends of livestock buildings. You get
> >higher
> > > >CO2 and some free heat. Also
> > > >some other benefits that are hard to put a $$$$ figure on.
> > > >We have access to a few used units and new. How large of a building
do
> >you
> > > >want to heat? If you have a need for 350,000 Btu's a boiler is more
> > > >flexible
> > > >to different uses.
> > > >You can heat the tanks and the grow beds or use it as a space heater
> >and
> > > >air
> > > >conditioner.
> > > >Brent
> > > >
> > > >----- Original Message -----
> > > >From: "Mark Lum"
> > > >To:
> > > >Sent: Friday, August 24, 2001 7:08 PM
> > > >Subject: Green house heaters
> > > >
> > > >
> > > > > Bruce, I recently joined the Aquaponics email list and have
learned
> >a
> > > >lot
> > > > > from your posts. Where are you located?
> > > > >
> > > > > Also, you advised that could get waste oil burners at a fair
price.
> >I'd
> > > > > like to get some pricing and info on them, please. Is there a way
> >to
> > > >get
> > > > > both heat and CO2 (for the plants) from them, or are there too
many
> > > >other
> > > > > toxic vapors riding shotgun with the CO2?
> > > > > Thanks.
> > > > > -Mark
> > > > >
> > > > >
> > > > >
> > > >
> > > > >
> > > > >
> > > >
> > >
> > >
> > >
> > >
> >
> > >
> > >
> >
>
>
>
>
>
>
| Message 8
Subject: Re: Solviva Greenhouse type setup
From: "bennett"
Date: Sat, 1 Sep 2001 23:02:36 -0400
>about solar energy. I used to have a greenhouse in Indiana. I
>
>>http://prs.us.ohio-state.edu/~steen/sustain/solar_radiation_map.gif
>
>
Thanks Carolyn, for tthe map URL. Where your greenhouse was located in
Indiana, were you in the blue part of the map or the green part?
I'm located in the blue part of Ohio and want to maximize the use of solar
heat in the much larger greenhouse that I'm going to try and get put up this
fall
unless I sell it.:-/
Donna
| Message 9
Subject: Helpful Links
From: kris book
Date: Sat, 1 Sep 2001 22:18:07 -0600
This link is to a page full of great energy links. It will probably take
a year to visit half the good links.
http://www.biomass.org/links.htm
|
