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Thermophilic for Green Seed Energy

SEED is developing Thermophilic Anaerobic Digesters that operate at higher temperature and take more concentrated waste streams. These allow for more environmentally beneficial disposal of solids organics

and an increase in the of natural gas yield. The solids content is > 11% by weight within the digester and operating temperature is above 131 F degrees yielding a greater capability for producing compressed

or liquid natural gas from the methane.

 

Operations take place in three structures: the digester vessel(s), biogas storage, and biofilter. A compost greenhouse is constructed on top of the biofilter to further control odors and to utilize the waste heat contained in the effluent gases. SEED's team has many years experience with TAD technology systems and expertise in using natural gas from biomass for transportation and heating.

 

European and American innovations give TAD technologies unique ability to control odors. Storage silos are totally enclosed with ceramic coated steel to prevent odor release. Minute levels of oxygen are injected into the digester. This reduces the concentrations of hydrogen sulfide in the digester biogas and water/solids effluent, which is the source of the strong odor associated with some digesters. Biogas exiting the digester contains water vapor which is then condensed out. Dry gas is burned in a gas turbine or further refined. All odors are destroyed when dry biogas is burned directly.

 
 
Anaerobic Digestion

Anaerobic Digestion produces renewable energy in the form of biogas from organic materials such as manures and slurries, food waste and sewage sludge. We are committed to making the most of the potential of
anaerobic digestion to contribute to our climate change, waste management and wider environmental objectives.

Anaerobic Digesters are used extensively in Europe with the most facilities in Germany which has become Europe’s fastest growing renewable energy sector.

Currently in the United States, most anaerobic digestion is the "mesophilic" variety and is used for wastewater treatment and in agricultural settings to produce heat and electricity. Several larger mesophilic digester projects are being developed to add to the electrical grid for smaller cities.