A Simple Biodiesel Processor:-

The simplest way to make a biodiesel processor is to use a 55 gallon (208 l) steel drum and some sort of mixer. The mixer can be a circulating pump, such as a sump pump, or it can be an electric mixer for chemicals, specially made for drum stirring.

Making Biodiesel Flow Chart:-

A pump or stirrer will cost about US$200 if you buy it new, but you can build your own instead. With a bit of ingenuity, you can build a biodiesel processor that is inexpensive and effective. Tim Garrits of Kelseyville, california built such a processor from mostly recycled parts for under US$50. A simple biodiesel processor can be built from the following parts:

•  A 55 gallon (208 l) metal drum.
• A 1/2 hp electric motor.
• Two pulleys that give about 250 to 400 rpm at the mixer blade.
• A belt that goes around both pulleys.
• A rolled 2 inch (5 cm) rod for the mixer shaft.
• A propeller made from two shelf brackets, welded to either side of the rolled 2 inch rod. The shelf brackets look like two opposed “L”s and form a propeller about 14 inches (36 cm) in diameter. Basically any propeller-shaped metal would do, if it is made from about 12 or 14 gauge steel.
• A 3/4 inch (19 mm) brass ball valve for draining the glycerin.
• A hinge and piece of wood acting as a belt tensioner.
• A 2,000 watt electric water heater element.
• A water heater thermostat.
• Wood, screws, bolts, and other assorted mounting hardware.

A Note of Caution:-
You are dealing with dangerous chemicals when you make biodiesel. Both methanol and lye are strong bases. They can deaden nerve endings and cause permanent damage. For this reason, chemical resistant gloves, aprons, and eye wear should be worn when dealing with methanol and lye. Shoes, long sleeve shirts, and long pants are a must. Keep both methanol and lye in clearly marked containers. We recommend putting a skull and crossbones on them and writing something to the tune of “Danger! Toxic! Do Not Eat!” in addition to the contents.