Online measurement of primary sludge

After the separation of large contaminants, grease and sand, undissolved particles are brought to sedimentation in a clarifier. These deposited substances are referred to as primary sludge.

The primary sludge is conveyed either directly to the digester or to the thickener for further treatment. In the case of direct sludge pumping to the anaerobic digester, it is important to measure the exact dry matter content, which provides an accurate sludge load calculation, thus achieving optimal digestion efficiency.

During further thickening of the sludge, flocculants are added to the process, which leads to optimised dewatering grades. The MicroPolar LB 566 measuring system was developed especially for these applications. The microwave transmitter measures reliably the dry matter content and offers excellent accuracy. Representative measurement results are achieved due to the fact that the entire material flow in the pipeline is detected, even for large pipeline diameters.