Effect of different slurry pre–treatments on mechanical separation methods efficiency: preliminary results.

Chemical pre-treatment of manure is crucial in meeting most of separation objectives and achieving proper solid-liquid separation process. Efficiency of mechanical separators usually (mostly) depends on the type of manure (DM content) and on its capacity to remove small particles to the solid fraction. This study focuses on effect of biochar addition to raw slurry of two different polymers. Effect of polymer addition to co- digestate has also been assessed. Biochar addition to raw slurry increases the efficiency of chemical- mechanical separation. Synthetic polymer (PAM) did not show any affect on separation efficiency of co- digestate. Biochar addition and anaerobic digestion increase the effect of chitosan. Effect of biochar addition to raw slurry on separation efficiency is time dependent.