Acid-catalyzed esterification
     Adding acid to reduce acidity in feedstock oils. [Springboard Biodiesel website] [Chemistry LibreTexts]

ASTM-D6751
     The grade of fuel approved for sale by the US federal government. [ASTM.org]

B20
​     ​A blend of biodiesel and diesel containing 20% biodiesel and 80% diesel (the B stands for biodiesel and the number stands for the percentage in the blend.

B99
     99% biodiesel

B100
     ​What the BioPro equipment makes.

Biodiesel
​     A clean burning fuel that can be made from a long list of vegetable and animal oils and which will run in any diesel engine.

Diesel fuel
     Petroleum based fuel.

Drywash systems
     Any system, like the SpringPro™ T76, that uses solid media to filter and clean biodiesel after the reactions, obviating the need to wash the fuel using water. [Springboard Biodiesel website]

Dual reaction
​    An acid reaction (esterification) followed by a base reaction (transesterification), allowing dirtier oils to be converted into ASTM grade biodiesel. Also sometimes referred to as the acid/base reaction. 

Emulsion
​     A mixture of biodiesel, water, and soap. [Wikipedia]

Esterification
​     An acid reaction usually performed by adding an alcohol and an acid to a feedstock oil.

Feedstock oil
​     Any oil that can be converted into biodiesel fuel including but not limited to used cooking oil (UCO), animal fats, canola oil, sunflower oil, coconut oil, etc. [Science Direct]

Flash point
     The temperature at which a liquid is ignitable when sparked.

FFA
     Free fatty Acid

Greenhouse gas emissions
     What we're trying to reduce.

Lubricity
     The quality of lubrication in a fuel.

MIU
     A measurement of the volume of contaminants found in a feedstock oil, specifically, Moisture and volatiles, Insoluble Impurities and Unsaponifiables.

Particulate matter
     That which is emitted from fuels which can cause respiratory illness.

RINs
     Renewable Identification Numbers. RINs are the credits that the US EPA uses to track and enforce compliance with the renewable fuels mandates set by the RFS in the US. RINs are records of individual batches of renewable fuel being blended into the gasoline and diesel pools. RINs are created when a batch of renewable fuel is made.

SVO
     Straight vegetable oil. [U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy]

​Titration
     A method for determining the free fatty acid content of a feedstock oil.

Transesterification
​     A base reaction usually performed by adding a mixture of alcohol and sodium or potassium hydroxide.

ULSD
     Ultra low sulfur diesel.

Viscosity
     A measurement of the resistance of a fluid to flow

WVO
     Waste vegetable oil.

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