Abstract: A combined anaerobic digester system and gas-to-liquid system is disclosed. The anaerobic digester requires heat, and produces methane. The gas-to-liquid system produces heat, and converts methane to higher-value products, including methanol and formaldehyde. As such, the combination of the two systems results in significant savings in terms of capital and operating expenses. A process for producing bio-formaldehyde and bio-formalin from biogas is also disclosed.

Abstract: A combined anaerobic digester system and gas-to-liquid system is disclosed. The anaerobic digester requires heat, and produces methane. The gas-to-liquid system produces heat, and converts methane to higher-value products, including methanol and formaldehyde. As such, the combination of the two systems results in significant savings in terms of capital and operating expenses. A process for producing bio-formaldehyde and bio-formalin from biogas is also disclosed.

Abstract: The present invention provides useful cooking and/or heating fuel compositions which may be produced substantially from renewable resources, such as biomass, to provide green fuel compositions, methods, and systems. The fuel compositions include gases stored under pressure, liquids, and gels/gelled waxes. Gases and liquids can include dimethyl ether and one or more C2 or larger alcohols, or can include dimethyl ether and one or more C2 or larger hydrocarbons. Gels and gelled waxes can include dimethyl ether and/or one or more C1-4 alcohols and wax or a gel. Methods of making these fuel compositions, particularly from biomass-derived syngas, are also described. Various applications and methods of using the fuel compositions, such as portable cylinder fuels for camping, are disclosed. Additionally, principles of burner design for these fuel compositions are disclosed herein.