THE EFFECT OF SEOFOSS ON THE VISCOSITY OF SLURRY AND BIOMASS FROM BIOGAS PLANT Project period: 22 April 2021 - 1 February 2022 Project participants: Morten Lykkegaard Christensen, Dilan Seker, Anne-Sophie Schou Jødal, Mette Helene Sahl Haferbier, Henriette Casper Jensen, Department of Chemistry and Life Sciences, Aalborg University, Frederik Bajers Vej 7H. SUMMARY Addition of Seofoss to biomass reduces the viscosity of the biomass by 20-30%. The result was obtained for pig and cattle slurry as well as biomass from the reactor tank at a biogas plant. The tested samples were stored for four months at different temperatures. The viscosity decreases a few hours after the addition and the reduced viscosity is constant during biomass storage. PROJECT PURPOSE The purpose of the project is to measure the effect of Seofoss addition on the viscosity of cattle and pig manure as well as biomass from the biogas reactor. EXPERIMENTAL DESCRIPTION On 22 April 2021, Vilofoss delivered three different types of biomass (pig: pig slurry, cattle: cattle slurry, biogas: biomass from biogas reactor) at Aalborg University. The biomass from the biogas reactor comes from a biogas plant, which is mainly based on cattle manure, deep litter and maize. The three biomass types were analyzed by measuring pH, dry matter (DM) and calcined residue (% of DM). Calcined residues are found by burning dry matter at 550 0 C, leaving only inorganic matter. Table 1: Data for the received biomass pH Pigs 7.13 Cattle 7.65 Biogas 7.35 DM (w/w) 3.23% 0.08% 8.11% 0.07% 6.99% 0.10% Calcined residues (% of DM) 30.6% 0.4% 19.3% 0.6% 7.0% 0.6% As expected, the dry matter is different for the biomass types studied. Note that the dry matter is one of the parameters that is very important for the viscosity. 1
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