Brightwork

The research on the rotating belt (fine) sieve of Salsnes in cooperation with waterboard Wetterskip Fryslân and BWA has ended. The fine sieve is tested for six months with good results for the removal of suspended solids in the influent. Despite the “thin” waste water an average of 54% removal of suspended solids was achieved. This makes the fine sieve a good alternative for primary sedimentation. The main advantage of the fine sieve is that the sludge is discharged with a higher dry matter content and this leads to significant savings in transportation costs. In addition, less space is required and therefore less air needs to be treated for odor control.

In cooperation with Wetterskip Fryslân a follow-up study is performed at several wwtp’s . It looks specifically at simultaneous sieving of influent and secondary sludge. The research fits within the ambitions of the Wetterskip to a more sustainable treatment of waste water.