2002 · 11 citations · 15 references
EngineeringAnimal SciencesEnvironmental EngineeringLivestock ProductionSolid Waste ManagementWaste ManagementAnaerobic DigestionBiogas ProductionNutrient DigestionOrganic Waste ManagementOrganic Waste RecoveryWaste TreatmentAgricultural Residue DigestionAnaerobic DigestersAnaerobic Digestion Of BiomassAnaerobic Digestion ResidueBest Demonstrated Available TechnologyCoagulationProcess Optimization In Anaerobic DigestionSolids Separation Efficiency
Abstract: One option for managing liquid livestock waste is an efficient separation of the liquidand solid fractions, and their subsequent treatment applying the best available technology. SELCO-Ecopurin is a technique which effectively separates liquid and solid phases using polyacrylamideas a coagulation agent. Anaerobic digestion of the solid fraction is an attractive option on account ofits agronomic and energetic values. This work studies the toxicity of polyacrylamide residues forthe anaerobic process. It also determines the optimum range of total solid concentration formaximum gas production as a function of polyacrylamide concentration. The results have shownthat it is feasible to apply anaerobic process to the solid fraction phase obtained from a separationprocess with a polyacrylamide concentration of 120 mg/kg, which is the usual dose used, producinga fraction with a 13% total solid content. Optimum gas yield has been obtained at a slightly lowertotal solid concentration. Keywords:
15