In order to be landfilled, the grit must be further treated before. Depending on the size of the sewage treatment plant and the amount of grit, grit classifiers or grit washers are used. The state of the art is now the grit washer.
HUBER Grit Washer RoSF G4E Continuous grit separation, washing and dewatering in one system
Classifying and washing in one system
- Reduced disposal costs
- Low investment costs
- Over 90% separation efficiency of grain size > 0.2 mm
- Reduction of organic content to < 5%
- Also suitable for classified grit trap material from biogas plants
The Grit Washer RoSF G4E combines continuous separation and washout of contaminated grit trap material in one plant.
HUBER Grit Washer RoSF G4E
HUBER Grit Washer RoSF G4E installation on a municipal sewage treatment plant
HUBER Grit Washer RoSF G4E reduces the organic content in grit to < 5%
HUBER Grit Washer RoSF G4E in the HUBER Production
Special design for the treatment of sediments from biogas plants
Design and function
Grit classifying
Sediments from the grit trap are introduced in the upper part of the plant as a mixture of grit, organics and water. Due to the low surface overflow rate virtually all particles are separated and accumulate in the bottom part of the tank.
Grit washing
Due to the introduction of service water in combination with a slowly rotating circulation system the lighter organic particles can easily be separated from the dense mineral particles in the bottom part of the tank. After removal of the organic material the clean grit is auto-matically removed by a screw conveyor, at the same time statically dewatered, and discharged into a container.
The removed organics are continuously discharged with the introduced wash water.
The benefits of the HUBER Grit Washer RoSF G4E
- Reduced disposal costs
- Reduced water consumption below 2 m3/h
- Surface overflow rate < 25 m/h
- 90% separation efficiency of grain size > 0.2 mm
- Reduction of organic content to ≤ 5 %
- Dry residue in washed grit > 90%
- Screened wastewater can be used as wash water
- Two plant sizes available (8 l/s and 16 l/s throughput)
- Optionally available as a classifier with wash function
- Also suitable for classified grit trap material from biogas plants
Downloads
Customer Information and Documents
FAQ
Frequently Asked Questions
Due to the additional washing in the HUBER Grit Washer RoSF G4E, the organic content in the discharged grit can be reduced to ≤ 5%. This leads to possible lower disposal costs and volumes.
In municipal wastewater treatment, grit is separated in a grit trap. This separation takes place by sedimentation, i.e. the grit settles in the grit chamber after sufficient retention time. However, since there are not only mineral substances such as grit in the wastewater, but also many organic solids, these also settle to a greater or lesser extent. As a result, when the grit is discharged from the grit chamber, it sometimes contains a large amount of organic solids. This contamination of the grit with organic matter hinders, among other things, cost-effective landfilling or reuse of the grit.
Grit washing with a HUBER Grit Washer RoSF4 solves this problem and produces clean grit with an organic content of less than 3% loss on ignition, the HUBER Grit Washer RoSF G4E reduces the organic content to ≤ 5%.
