Could anyone suggest a publication regarding degradation limit during anaerobic digestion of sludge? What's the composition of refractory matter in the sludge and which analytical techniques can be used to determine that?
Our work would suggest that this waste stream is a colloid of cellulose, grit, and water. If it is broken, then the grit can be easily separated an used as either cover at a landfill or as road sand in the winter. The water can be returned to the beginning of the process for reprocessing. The cellulose can be converted and processed for application in either paper production or adhesives. The protein can be denatured and used to produce biodiesel. Attached is a photograph showing the results of treating sewer cake with the Managed Ecosystem Fermentation process. The flask at the left was treated with our process. The one on the right shows the sewer cake in water 24 hours after the test began. Also attached is a paper titled "Products From Organic Waste Using Managed Ecosystem Fermentation" scheduled for publication in June in the Journal of Sustainable Development.