Landfill Gas-to-Energy Design, Texas

This project includes two, 1.6 MW Caterpillar 3520 engine-generators (total of 3.2 MW) assembled in containers and necessary facilities for an expansion to a third generator; two engine radiators and expansion for a third; about 100 lineal feet of landfill gas (LFG) header pipe with condensate sump; a skid mounted air compressor; a pre-assembled LFG compressor skid including the compressor, air cooler and coalescing condensate separators sized for three engine-generators; the 5 KV Switchgear and other electrical equipment sized for three generators assembled in a container; a step-up transformer sized for three generators; and a transformer to handle station load for three generators.  Aether DBS prepared design drawings for the facility including site civil, structural, and mechanical drawings, and coordinated with the electrical designer for the facility.

High Solids Anaerobic Digestion (HSAD) System Design, Orbit Energy

Aether has developed a conceptual design for a 120 wet ton-per-day HSAD system that will generate electricity to sell to power companies.  Electricity will be generated in cogeneration units using biogas from the HSAD system digesting various feedstocks.  The feed materials may be waste food, food processing wastes (e.g., DAF float from meat processing facilities), animal (e.g., hogs) manure, and/or other organic wastes or byproducts.

Landfill Gas-to-Energy Design, Massachusetts

Aether prepared design drawings and specifications for a 1.6 MW landfill gas (LFG) electrical generation facility. The project included a pre-assembled LFG compressor skid (including the compressor, air cooler and coalescing condensate separators); a Caterpillar 3520 engine-generator (assembled in a container); and associated electrical switchgear, transformers, and MCC. The LFG compressor skid, MCC, and electrical switchgear were enclosed in a site-constructed CMU building. The gas supply piping was tied into the existing LFG collection piping; condensate was collected in a sump and returned to the existing condensate collection system.  Aether provided the site civil, structural, architectural, mechanical and electrical drawings for the project and assisted in obtaining local building permits.

Biogas Blending System, Bio-Solids Processing Facility, California

Aether DBS designed and manufactured a biogas blending system for the Rialto Bio-Solids Processing Facility in Rialto, California.  The Bio-Blend AFC gas blender was developed to utilize available sewage sludge biogas to offset natural gas usage in typical natural gas-burning equipment. This system is part of a plan to recycle biosolids from several Southern California municipalities.

This application required 23,300 scf per hour of biogas/natural gas to be delivered at 8 psig and a resulting calorific value of 860 Btu/scf (gross). Natural gas is supplied to the Bio-Blend primary flow stream at 10 psig; this stream is open to deliver natural gas with no restriction or control.  Biogas, produced by a digestion process, is supplied to the blender at 20 psig from a digester supply blower. Biogas is injected into the natural gas flow stream based on the desired mixture and natural gas demand.  The Bio-Blend instrumentation and controls continually monitor both gas streams for flow, pressure, and temperature and compensate the amount of each gas flower through the blender to maintain a consistent gas mixture.