KGERL Anaerobic Hydraulic Digester
The KGERL anaerobic hydraulic digester is a fixed-dome plant with an immovable, rigid gas holder, a feedstock inlet, and a displacement pit (compensation tank). Feeding of the digester is within the upper part of the digester. By separating the digester into a main and secondary compartment with an integrated substrate (feedstock) the anaerobic process is initiated. The biogas head spaces of the main and secondary chamber are connected with pipe and an automatic butterfly valve. In the digester, closing the valve biogas, gas pressure increases in the main compartment and the slurry is displaced into the secondary compartment creating a hydraulic gradient. After a defined level is achieved within the digester between the two components, the automatic valve opens and the displaced slurry returns at a high flow in a process known as back-flushing to the main component. Displacement of the slurry and back-flushing between the compartments of the digester are arranged such that scum layer and sediment formation is prevented. The operation between the main and secondary compartments prevent short circuiting and creates optimum conditions for the degradation of recalcitrant components contained in the substrate. The gas in the upper chamber of the digester.