Methods and compositions for the production of dielectric fluids from lipids produced by microorganisms are provided, including oil-bearing microorganisms and methods of low cost cultivation of such microorganisms. Microalgal cells containing exogenous genes encoding, for example, a sucrose transporter, a sucrose invertase, a fructokinase, a polysaccharide-degrading enzyme, a lipid pathway modification enzyme, a fatty acyl-ACP thioesterase, a desaturase, a fatty acyl-CoA/aldehyde reductase, and/or an acyl carrier protein are useful in manufacturing dielectric fluids.

Methods and systems for filtering a plant-derived extract to remove contaminants, including a filter column containing a filter medium and a vacuum pump. The plant-derived extract is mixed with a solvent, and drawn through the filter column across the filter medium. In various embodiments, the solvent and filter medium may be selected to target specific contaminants or classes of contaminants, such as herbicides, insecticides, fungicides and/or other synthetic agrichemicals.

Methods for producing oil from distillers corn oil having high free fatty acid content are provided. In the method, distiller's corn oil is treated with a mixture including an alcohol to result in a low-free fatty acid oily phase and an alcohol phase. The mixture may also include an alkali. The alcohol may be a monohydric alcohol and an aqueous alcohol, such as an aqueous alcohol having a concentration of at least about 15% alcohol-by-weight. The low-free fatty acid phase may include oil and at least one impurity. The low-free fatty acid phase may be cooled, and the oil may be separated from the at least one impurity.

Methods for producing oil from distillers corn oil having high free fatty acid content are provided. In the method, distiller's corn oil is treated with a mixture including an alcohol to result in a low-free fatty acid oily phase and an alcohol phase. The mixture may also include an alkali. The alcohol may be a monohydric alcohol and an aqueous alcohol, such as an aqueous alcohol having a concentration of at least about 15% alcohol-by-weight. The low-free fatty acid phase may include oil and at least one impurity. The low-free fatty acid phase may be cooled, and the oil may be separated from the at least one impurity using membrane filtration.

Apparatus for filtering used cooking oil includes a container, an inner cup, and a filter pad. The apparatus can be configured to remove undesirable impurities from liquid. For example, the apparatus can be configured to remove total polar molecules and lovibond color red from used cooking oil.

The present disclosure relates methods and systems for refining grain oil compositions using water, and related compositions produced therefrom. The present disclosure also relates to methods of using grain oil derived from a fermentation product in an anti-foam composition and/or feedstock to make diesel.

This invention discloses a highly active and highly safe substance, its preparation method, and its use. This substance is prepared from rubber seed crude oil, through alkali neutralization, centrifugal separation, adsorption filtration, and deodorization. This substance is not only highly active in preventing and treating atherosclerosis than that of rubber seed crude oil; but also highly safe which can meet requirements in the national standard of food safety. The substance can be used in pharmaceuticals to prevent and treat atherosclerosis in patients with cardiovascular and cerebrovascular diseases.

A storage tank system includes a storage tank for storing biological feedstock, a filtering system configured to separate sludge from the biological feedstock, and a water separator configured to separate water from the biological feedstock. A material transfer system transfers biological feedstock from the lower portion of the storage tank via the filtering system to the water separator and, from the water separator, residual biological feedstock from which water has been removed at least partially back to the storage tank. The removal of water reduces unwanted gas generation by microbiological reactions, and safety of the storage tank system is improved.

Methods for producing oil from distillers corn oil having high free fatty acid content are provided. In the method, distiller's corn oil is treated with a mixture including an alcohol to result in a low-free fatty acid oily phase and an alcohol phase. The mixture may also include an alkali. The alcohol may be a monohydric alcohol and an aqueous alcohol, such as an aqueous alcohol having a concentration of at least about 15% alcohol-by-weight. The low-free fatty acid phase may include oil and at least one impurity. The low-free fatty acid phase may be cooled, and the oil may be separated from the at least one impurity using membrane filtration.

Methods to prepare vegetable oil compositions having an elevated ethyl ester content are provided.