Hawaii Gas Co. to Recycle Biogas Produced at Sewage Plant

By Associated Press.

HONOLULU (AP) — Honolulu officials say they are moving forward with plans to sell biogas produced at the city's sewage plant to Hawaii Gas Co.

The gas company says it plans to spend about $5 million on equipment to clean the sewage plant's biogas before adding it into their pipelines. It also wants to construct approximately one mile (1.61 kilometer) of new pipeline to connect its purification system to the company's existing synthetic natural gas pipeline.

Hawaii Gas would buy gas from the city at $2 a therm, the Honolulu Star Advertiser reported Monday. Currently, the gas company purchases gas at about $1.75 per therm.

Biogas is fuel comprised of about 60 percent methane and 40 percent carbon dioxide, which the Honouliuli Wastewater Treatment Plant had been capturing and burning off.