A Biodiesel Test to Check for Clean Fuel

Use a biodiesel test to determine if the fuel is completely washed. First, check the clarity of the wash water. If it is clear, do a water test by taking its pH and compare it to the pH of before the wash water was used. If it is the same pH, it is likely clean, however, you can do the shake test to be extra sure.


Check the Clarity of the Wash Water:

If the wash water is clear, or looks the same as when it entered, it is an indication the biodiesel is clean. If it passes this test, move on to the pH test.


pH Wash Water Test:

Take a pH test of the exiting wash water. If the pH is the same as before you started washing with it, it your biodiesel is likely clean. (This indicates that all the soap has been removed.


Shake Test:

If your fuel passed the Clarity and pH tests, but you want to be extra sure, do this quick test as well.

Fill a sealable bottle half with biodiesel, half with water. (The biodiesel you are putting in here needs to be unwashed, with the glycerin drained.) Seal the bottle and shake it vigorously for 15 seconds.

If the water and biodiesel separate quickly, and the water is clear, this can be an in indication the biodiesel is clean.

Although, some say the water can be clear while the biodiesel still contains glycerin and soap.

Biodiesel Test for Finished Fuel>>>

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