SOI Zwolle centrate pretreatment for feed to AMX
Client: Waterschap Drents Overijsselse Delta
Keywords: centrate, Anammox, pretreatment, drum filter, pilot
At WwTW Zwolle, the Netherlands, an Anammox process is applied to treat the nitrogen rich waste stream from the sludge dewatering. Sludge is dewatered using two centrifuges. The centrate is fed into the Anammox reactor. Removing most of the anorganic substances from the centrate, prior to feeding it into the reactor, will lead to a more reliable and stable biological process. A pilot using a drum filter is executed to determine the basis of design.
Drum filter with spray nozzles
Pilot set -up
“If in doubt, try it out”. With a small package unit we could simulate the performance of the plant, and try different operational settings: throughput, mesh width, washing frequencies and the characteristics of the residue. Also the operational staff involved were able to familiarize with the technology. The final solution leads to a serial “roughing” screening of the centrate, using the existing screen and the implementation of a fine screening drum filter.
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