Municipal wastewater consists of both particle-bound and dissolved impurities. The particles are normally called suspended solids (SS). Local conditions determine the SS content and how much of the impurities that are solid. As a rule of thumb 40–60 per cent of BOD takes the form of SS.
The SS particles vary in size, and the smaller they are the more difficult they are to separate. Our coagulants and flocculants agglomerate particles. This means that smaller particles combine with larger ones and are easier to separate in a sedimentation tank or a filter. We can provide products or product combinations for basically any situation where it is necessary to remove particles from wastewater.
By removing particles before the biological treatment process, the load on the secondary treatment is decreased. Since particle-bound BOD is harder to degrade than dissolved, the savings in capacity volume and energy consumption are even better than those achieved by improving SS removal alone.
SS is also a good source for producing biogas in an anaerobic digester. By utilizing our products and knowledge in SS removal and biological treatment processes, we can guarantee to come up with a proposal that reduces emissions of greenhouse gases from a municipal wastewater treatment plant.