Aquaponics (archived - 2012)
Members Involved
- Bengizmo
- Bree
- Michael B
- Zac T
Project Scope
To investigate various methods of growing food for personal use and the possibility of industrial use. We aim to collect data and share with other groups to further the collective knowledge on the subject. As the project progresses, no doubt the scope will change.
Hopefully we will be able to come up with some best practices and schematics so anyone who wants to can make there own system.
Aquaponics
Aquaponics is a system who's aim is to emulate the natural cycle of growing food as closely as possible. It uses a combination of hydroponic growing with fish care to create a (almost) closed loop system. Basically, fish food is added to the tank, the fish eat it. The fish waste is used to fertilize the plants. Water is recycled in the loop. In a perfect system, the extra plant mater that isn't used by humans could also be used as fish food. A full explination on the Nitrogen cycle can be found here
Current Situation
We have a member that is willing to donate a working system to us. We will also have to decide on what sort of crop we want to grow.
Moving Forward
First things first, we need to get the system up and running. Once it's up, we can start tinkering and monitoring it's progress. There are several areas that we can look into.
Lighting
Natural light is great, but it's not always available. Maybe your house doesn't face south, maybe you live in a cave. Either way, light is how plants do there thing and it also takes a lot of energy. Current lights can easily draw 1000W and cost a hundred dollars. I think we can do better than that. Plants have a very narrow spectrum where they absorb light; so white light isn't really necessarily. With LEDs, the correct spectrum can be used thus creating a more efficient system. If we really want to get fancy, we could liquid cool the LEDs and use that heat to keep the fish at the proper temperature.
Luminous efficiency of various light sources
Monitoring Progress
There are many different things that need to be monitored. Nutrient and pH levels, temperature, flow rates, luminosity and so on. We are going to need some micro controller wizards to whip up some code to keep track of all these data points and log them. We can't figure out our efficiency without numbers. Once we have data we can start comparing it to other systems and tweak as necessary.
For an example as to why monitoring is important, fish and plants need different pH levels, so it must be monitored to keep it in habitable zones for both.
Tweaks
There are many different pumps, tanks, filters and systems out there. Should we use a gravity system or multiple pumps? How are we going to deal with heavy metals? What about bacteria? (Good and bad)
All sorts of questions since this is a relativity new science. That's what makes it awesome.
Other Groups
An article about a setup in Brooks
It was mentioned that we look at city resources, such as the Bird Sanctuary and the Fish Hatchery.