Fish oil needs an acid pretreatment because of the high %FFA. Then it needs drying and sometimes dewaxing. After this a standard biodiesel reaction with caustic soda will convert the fish oil into biodiesel. More you can read at: http://www.greenerpro.com/BiodieselProcess.html
Janitor fish can be used as an organic fertilizer in the form of a liquid emulsifier for crops like corn and tomatoes. The nutrients found in this fertilizer are nitrogen, phosphorus, and potassium. It can also have other uses as animal feed, biodiesel, and food. The janitor fish is an invasive species of catfish that is native to the Amazon River.
No, it is a fish.
The scientific name of a janitor fish is Pterygoplichthys pardalis.
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Biodiesel is made from from various vegetable oils, fish oils, and fats. The yield is often expressed in gallons per acre rather than per pound. For fish wastes, one estimate is 1 ton of biodiesel from every 6 tons of fish.
Eat it
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The term "janitor fish" can be applied to any fish with an underslung suckermouth, including Plecos, Chinese Algae Eaters and Siamese Algae Eaters. And none of them perform any kind of "janitor" duty, Plecos in particular are HUGE waste producers, a happy Pleco is a pooping Pleco, and are actually quite the opposite of any kind of "janitor"!! Nothing eats fish poop.
You often only find biodiesel in the Midwest or areas where corn is a big market. Biodiesel is made out of corn and that's why. Biodiesel will make your diesel engine get better gas mileage just so you know.
Janitor fish are bottom feeders and primarily eat algae, detritus, and leftover scraps of food in aquariums. They may also consume small invertebrates and decaying plant matter. It's important to provide them with a varied diet to ensure they receive proper nutrition.
WHen there is no other fish in the tank