A grit washing plant that reduces the disposal costs whilst providing a secondary raw material as a by-product which can be reused and recycled.

HUBER Coanda Grit Washing Plant RoSF4/HUBER Grit Treatment Process RoSF 5-HW(S)
HUBER Coanda Grit Washing Plant RoSF4 combines grit classifying and grit washing in a single and compact unit. By using the Coanda effect the process of classifying can be combined with the process of sorting to ensure a continuously high separation efficiency and outstanding washing performance. After removal of the organic material in the grit washers the clean grit is removed through a classifying screw, statically dewatered and discharged into a container. The end product of grit washer plant should be regarded as a valuable product with a low loss on ignition (< 3 %) and a high DR (> 90 %). Grit treatment thus reduces both the disposal costs whilst providing a secondary raw material as a by-product which can be reused and recycled.
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- No additional preceding screening required (e.g. < 4 mm)
- Reduced disposal costs
- 95% capture rate of 0.20 – 0.25 mm diameter grit particles due to the Coanda
- Effect and low surface overflow rate
- Organic content reduction to < 3% loss on ignition; reutilisation or TASI dumping possible
- Dewatering of washed grit to very high DS content of approximately 90% dry residue
- High grit and gravel yield
- Suitable for treatment of grit from sewers, gully waste, road sweepings
- No crushing of stones and gravel
- Online grit level measurement during grit feeding
- Separate organics discharge allows for separate further treatment of organics
- Large diameter screws for a high solid throughput
- Stainless steel stirrer and screw
- Easy to integrate into complete treatment processes
- Up to 3 m³ solids throughput per hour