Mass for biological waste plant - maintained by pairs of parallel worms which travel crosswise and lengthwise on crab

摘要

The filter mass in the filter troughs of biological waste gas filter plant is maintained in a loosened state by pairs of parallel worms which can travel on a crab crosswise and lengthwise. The lossening worms can be turned from a horizontal position of rest to a vertical position. Their shafts are hollow and have radial holes through which water can be ejected. ADVANTAGE - This lossens and waters the filter mass satisfactorily, without need to dismantle the troughs from the filter plant.