Events

Converting sludge waste into methane gas to fuel steam production. Georgia-Pacific's Halsey Mill produces around 60 MT of secondary fiber sludge daily as waste effluent that is disposed of to nearby sourced farmers as soil enrichment at a cost of $19/MT. This sludge contains high levels of ash and clay due to the additives used in the recycled paper, but is also rich in cellulose, hemicellulose, and lignin, all of which provide a substrate for bioenergy production. The use of anaerobic digestion for the secondary sludge waste will reduce the quantity of overall waste resulting in lower disposal costs, as well as methane gas production that can be used for the generation of steam to lower the plants utility costs.