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> Water in RAS tanks flows through a bubbling container called a bio-filter, in which bacteria consume fish urine and convert it into a form of nitrogen that is
by mabbo 8y ago
> Water in RAS tanks flows through a bubbling container called a bio-filter, in which bacteria consume fish urine and convert it into a form of nitrogen that is safe for the fish and environment
I wonder if a system like this might be instead kept clean (in part or full) with the help of an Aquaponics[0] system. In that design, you filter the water by growing food hydroponically. The fish waste acts as a nutrient for the plants, which clean the water for the fish. Food out of both ends of the equation.
[0]https://en.wikipedia.org/wiki/Aquaponics https://en.wikipedia.org/wiki/Aquaponics
- etrevino 8y agoThey seem to be combining several steps here (though maybe I'm wrong). In a comparable aquarium build the bubbling helps to oxygenate the water and to support the protein skimmer. You have things like bioballs with a large surface area to contain the bacteria and that acts to process the waste. But, to answer your question: I think it can probably be done on an industrial scale. Many larger fish tank setups have refugiums, where the water is processed. Some people set those up with plants which, in my experience, grow really well. I've only used underwater plants, but it makes sense that you could use others.