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Grit Treatment |
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| Proven technology ensures operating reliability with a high yield and optimal efficiency. For unrestricted disposal at landfills or as a necessary pretreatment for recycling |
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Subordinated Product Groups |
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Grit and mineral material from wastewater treatment plants or sewer and road cleaning are usually more or less contaminated with organic particles or other foreign matter similar to domestic waste. Such contamination in the heterogeneous mixture results in a relatively low dry substance content [DR], ranging between 40 % and 70 %, and in a relatively high loss on ignition [GV] in the range of 10-80 %. The purpose of a well performing grit treatment system is removal of grit up to 0.20 mm grain size and subsequent separation of the valuable grit and mineral fraction from the contamination material. The end product of grit treatment is a valuable product with a low loss on ignition (< 3 %) and a high DR (> 90 %). Grit treatment thus reduces on the one hand disposal costs and on the other hand produces a secondary raw material that can be reused.
As the composition of the polluted grit to be treated can be vary greatly, depending on its source of production, the decisive factor when planning a treatment plant is the selection of the best suited treatment system.
Treatment of grit from wastewater treatment plants
If the grit to be treated is material from the grit trap of a wastewater treatment plant, the worldwide best proven solution is the HUBER Grit Washing Plant. The HUBER Grit Washing Plant ensures that the organics in the grit are washed out to such a degree that the treated grit has a loss on ignition of below 3 %, which allows low-cost grit disposal or direct reuse of such grit.
Many countries meanwhile have an according legislation that defines the requirements for washed grit. In practice, not only the effective separation of organic and mineral material is decisive, but also the retention of fine grit. The HUBER Grit Washing Plant takes this fact into account.
Treatment of grit from sewers and road refuse
Grit from sewers or road sinks or road refuse requires individually designed grit treatment systems. Depending on the system capacity, input material composition, requested material output, etc., the treatment technology has to be tailored to meet specific requirements. The main process steps: acceptance tank, foreign matter separation, wash drum for pre-classification, grit washing plant for separation of organic material.
If the external supply and treatment of the wash water required for grit treatment cannot be provided, an additional wash water treatment unit can optionally be supplied for recycling of the required water.
On the basis of its wealth of experience in developing complete grit treatment systems, HUBER is able to provide a tailored concept and solution for each individual grit treatment project.
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HUBER - WHERE QUALITY AND SERVICE SPRING TO MIND
Huber Technology UK, Units C and D Brunel Park
Bumpers Farm, Chippenham Wiltshire SN14 6NQ
Phone +44 1249 765000, Fax +44 1249 449076, E-mail: rotamat@huber.co.uk |
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