The process looks as follows: General waste (household waste and similar commercial wastes) is mechanically shredded and then sieved at 0-40 mm. It is then mixed with water and sieved again at 0-20 mm. The next step is sand removal (any sand still present is filtered out, the sand sinks to the bottom), followed by the fermenter. Fermenting the organic fraction of the waste produces biogas, which is used to generate electricity for supplying the facility’s equipment or for feeding into the public grid.
The fermentation remains are taken from the fermenters and subjected to separation. This is where the FAN separators come into play! Five separators can be automatically activated in sequence, depending on the incoming quantity and the throughput of each individual separator. Each separator has its own holding tank of about 0.5 cubic meters. When this is full, the next separator and its holding tank are automatically activated. After separation with the PSS, the liquid medium is filtered again in a decanter and separated from the residual solids. The liquid fraction left over here is reintroduced into the process. The solids are landfilled after separation.
"Compared with the originally planned, very energy-intensive belt driers, the FAN separators proved to be the more economical option and are the ideal solution for the waste management center. The solids obtained after separation are perfectly in line with the values required in the Landfill Ordinance."
5 FAN PSS 3.2-1040 separators have been in operation year-round since 2005.
Solid feed stock: 3.5% DM content
pH of the medium: 8
Throughput: About 90 m³/h through 3-5 separators