Sand washer/Grit washer

The Stjernholm Grit Washer effectively washes organic material from the sand, leaving a minimum of sand particles in the reject water

Many Danish wastewater treatment plants use the grit washer from Stjernholm as a fixed installation. Therefore, we are able to document very good results, e.g. up to 95% dry matter and an ignition loss of less than 3%.

The grit washer from Stjernholm is characterized by effective washing, leaving less than 3% of organic material in the grit and less than 10% sand particles in the reject water. Such a high level of efficiency significantly reduces costs related to disposal and transport.

All our grit washers are highly customizable and a perfect solution for grit washing and dewatering at

Municipal wastewater treatment plants as new installations, expansion and upgrades or replacements for worn out grit washers or grit classifiers
Receiving station for vacuum trucks and street sweepers
Large lift stations (grit pit/ponds)
Dairy farms using sand bedding – separation of slurry and sand (99% reuse of sand).

Stjernholm Grit Washer is available in 4 different sizes with a treating capacity up to 3000 l/m equal to 793 gal/m – and a grit output of up to 3 tons per hour with two screw conveyers.

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STJERNHOLM GRIT WASHER

When you cooperate with us, you know that we are focusing on delivering a solution to you that adds value to your facility.

ECONOMIC

Reduce hauling and landfill costs: Separating grit and organic material and dewatering of the grit can significantly reduce the disposal volume (up to 90 %)
Carbon harvesting: By separation of grit and organic material, organics are send to the treatment process downstream. As a rule of thumb 1 lb organics produces 16 ft3 biogas
Less wear and tear of downstream equipment and less grit buildup in tanks and digesters: Optimal operation of an aerated grit chamber can reduce the energy use in the grit chamber by up to 75% energy in order to retain as much grit as possible
Product lifespan of 15-20 years

ENVIRONMENT

Resource recovery: Utilization of organics to biogas production
Grit reuse: What is the reuse potential of grit in your area with maximum 3% organics in grit output? E.g. as construction material
Reduction of emissions: Reduced hauling reduces the total CO2 emissions
Reduction of emissions: Very energy efficient electrical motor and gears help reduce the total emissions of the plant

CSR

Less odor: Closed system and minimal organics in output = happier neighbors and a better working environment and reduced risks for the operators
No chemicals: Mechanical separation of grit and organics