In general, one aspect disclosed features a process for treating a lipid containing compound (LCC), the process comprising: producing a first mixture by mixing an aqueous chelate with the LCC, wherein the aqueous chelate comprises Ethylenediaminetetraacetic acid (EDTA), and wherein the LCC is a rendered fat; and separating an aqueous gum containing phase of the first mixture from a lipid containing phase of the first mixture.

In general, one aspect disclosed features a process for degumming of lipid-containing compounds for fuel feedstock, the process comprising; receiving a lipid-containing compound (LCC); degumming the LCC using at least one acid in an acid degumming stage to produce a partially-degummed LCC; and degumming the partially-degummed LCC using at least one chelate in a chelate degumming stage to produce a degummed LCC.

In general, one aspect disclosed features a product produced by a process for treating a lipid containing compound (LCC), the process comprising: producing a first mixture having a pH lower than 2 by vigorously mixing an acid with the LCC; and producing a second mixture having a pH between 2.5 and 7 by adding a base to the first mixture, wherein a majority of free fatty acid in the second mixture is not converted into soapstock.

In general, one aspect disclosed features a product produced by a process for degumming a lipid-containing compound (LCC) for fuel feedstock, the process comprising; receiving a LCC; degumming the LCC using at least one acid in an acid degumming stage to produce a partially-degummed LCC; and degumming the partially-degummed LCC using at least one chelate in a chelate degumming stage to produce a degummed LCC.

In general, one aspect disclosed features a product produced by a process for degumming a lipid-containing compound (LCC) for fuel feedstock, the process comprising; receiving a LCC; degumming the LCC using at least one acid in an acid degumming stage to produce a partially-degummed LCC; and degumming the partially-degummed LCC using at least one chelate in a chelate degumming stage to produce a degummed LCC.

In general, one aspect disclosed features a process for treating a lipid containing compound (LCC), the process comprising: producing a first mixture having a pH lower than 2 by vigorously mixing an acid with the LCC; and producing a second mixture having a pH between 2.5 and 7 by adding a base to the first mixture, wherein a majority of free fatty acid in the second mixture is not converted into soapstock.

In general, one aspect disclosed features a process for treating a lipid containing compound (LCC), the process comprising: producing a first mixture having a pH lower than 2 by vigorously mixing an acid with the LCC; and producing a second mixture having a pH between 2.5 and 7 by adding a base to the first mixture, wherein a majority of free fatty acid in the second mixture is not converted into soapstock.

In general, one aspect disclosed features a product produced by a process for treating a lipid containing compound (LCC), the process comprising: producing a first mixture by mixing an aqueous chelate with the LCC, wherein the aqueous chelate comprises Ethylenediaminetetraacetic acid (EDTA), and wherein the LCC is a rendered fat; and separating an aqueous gum containing phase of the first mixture from a lipid containing phase of the first mixture.

In general, one aspect disclosed features a product produced by a process for treating a lipid containing compound (LCC), the process comprising: producing a first mixture by mixing an aqueous chelate with the LCC, wherein the aqueous chelate comprises Ethylenediaminetetraacetic acid (EDTA), and wherein the LCC is a rendered fat; and separating an aqueous gum containing phase of the first mixture from a lipid containing phase of the first mixture.

This document describes methods and compositions for converting organic wastes into medium chain carboxylic acids (MCCAs). This document also describes methods and compositions for obtaining high yields of caproate from a fermentation broth comprising MCCAs.