Small biogas plants are often equipped with small progressive cavity pumps. However, the substrate that the pump conveys is not chopped smaller or contains less fibre than in large plants. Therefore, there is a risk of clogging and blockage in the suction housing of the progressive cavity pump. In a customer’s plant, chopped grass, manure and sugar beet are fed and the customer repeatedly had to deal with blockages.

Since the installation of the Armatec pipe inline cutter in November 2016 in the suction line of the progressive cavity pump, there are no more blockages, the fermenter needs less stirring and the medium is altogether more fluid, so that also much less deposits remain in the fermenter.