Cedar Grove in Everett, Washington Invests in the Best Technologies to Harness the Vitality of Biowaste
The plant in Everett offers an integrated total solution that enables an exceptionally high volume of green waste and biowaste per year to be composted to a high standard.
UTV AG
| Composting plant | Cedar Grove Everett | Capacity per year | 160.000 t/a |
| Location | Everett, Washington (USA) | Special Fact | Number of windrows: 64 |
| Material | Biowaste, green waste | Commissioning | 2004 |
The industry-leading environmental solutions company Cedar Grove in Everett, Washington harnesses the vitality of biowaste by recycling it into innovative products.
Cedar Grove Invests in the best technologies available worldwide, UTV AG’s GORE® Cover System since 2003. This windrow coverage is technically up to date and easy to handle. The GORE® Cover System makes it possible to control odors and reduce greenhouse gas emissions, among other things. The compost windrow is covered and sealed off from the ground so that it is physically sealed off from the outside.
High-tech membrane cover from GORE®
By using this system, a highly functional cover is pulled over the windrow: a three-layer laminate consisting of two high-quality, UV-stable textile fabrics and a waterproof and breathable semi-permeable membrane (GORE® Cover).
From the outside, the membrane reliably protects the rotting body against the effects of weather and rain. From the inside, it reliably retains odors, dust, germs and bacteria, but allows air and water vapor to escape.
Due to the special membrane properties of GORE® Cover for effective control of odors and emissions, a biofilter system is not necessary.
The climate that microorganisms need to convert biowaste into high-quality compost as quickly as possible is created under the membrane.
The GORE© Cover membrane can be easily spread over the windrow and removed again, for example for moving, using rotting modules to attach the tarpaulin to the side walls and tarpaulin winders.
GORE® Cover – Functions
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1. Side wall Allows more material to be treated in a consistently small area and the GORE® Cover to be attached airtight. 2. Oxygen sensor Continuously measures the oxygen content in the windrow. 3. Weather conditions The GORE® Cover means that the rotting material is virtually free from the effects of the weather. Rain, snow and hail cannot penetrate the material, and it is also protected from wind and sunlight. 4. Vaporization The semi-permeable membrane allows water vapour to escape. 5. Temperature sensor Continuously measures the temperature in the windrow.
6. Windrow body Offers variable windrow volumes (360-1000 m3) depending on windrow length (20-50m).
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7. Aeration If the oxygen content falls below the minimum level, the fan is activated and air is pressed into the material. 8. Drainage Any seepage water can be drained and collected via the channel system. 9. Air distribution More air is pressed into the windrow than can escape through the GORE® Cover. The resulting overpressure distributes the air and temperature evenly throughout the material. 10. Pressure sensor The daily inspection round is no longer necessary thanks to process monitoring by iCompost in conjunction with a pressure sensor. This saves working time and ensures process reliability. 11. Emission retention See facts and figures |
The GORE® Cover has a three-layer structure: The top layer serves as protection against external mechanical and weather influences. It is tear-resistant, and the coloring provides additional UV protection.
This is followed by the semi-permeable ePTFE membrane, which gives the GORE® Cover its odor, emission and bacteria-retaining function.
Underneath the membrane is another protective layer, which is designed to prevent damage caused by the rotting material and therefore extend the service life of the cover.
The plant in Everett offers an integrated total solution that enables the exceptionally high volume of around 160,000 tonnes of green waste and biowaste per year to be composted to a high standard in 64 windrows.
Am Alten Römerpfad 2
D - 76534 Baden-Baden
phone:+49 (0)7223 800 15 05
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