In-Vessel Compost Cover System

In-Vessel Compost Cover System

The ODOUR STOP™ compost cover system is manufactured by GE (General Electric) Energy Division, a trusted name known for its quality products. The cover system is designed to enhance the compost process while providing significant odorreducing capabilities. The fabric is manufactured in the US, and backed by a five-year warranty from GE. The ODOUR STOP™ cover system consists of three-layers. The two outside layers of the system are tough polyester fabrics that protect the inner layer (waterproof breathable membrane). The interior layer is a membrane made from a hydrophobic ePTFE (expanded polytetrafluoroethylene) film that has been rendered oil-repelling via a method that retains the inherent open-pore structure of the membrane. The ePTFE membrane pore size is so small that larger water molecules and odorous molecules (VOCs) cannot pass through the membrane. However, smaller molecules such as oxygen, water vapor and CO2 can pass through the membrane. The pore size of the membrane also prevents 99% of microorganisms from passing through the membrane to prevent airborne transmittal of pathogens and organic irritants. In addition to reducing odors, the ODOUR STOP™ cover system also prevents rainwater from the composting material preventing potential anaerobic conditions which lead to odors. In addition, the waterproof cover prevents contaminated water from leaving the compost piles. As organic materials are composting, volatile organic compounds (VOCs) are released as gaseous compounds and rise through the compost pile by convection. Also during the composting process water condenses on the underside of the ODOUR STOP™ fabric cover. When the rising VOCs come in contact with the condensed water on the fabric some VOCs are captured in the water. Over time the condensed water droplets fall back into the compost pile and the captured VOCs are consumed by the microorganisms in the pile. The ODOUR STOP™ cover material is designed allow compost facilities to operate with significantly reduced odor generation and may allow it to meet new stringent air emission restrictions. The system is specifically designed for the compost industry to reduce odors associated with the compost process, increase compost rates, and reduce contaminated runoff from compost piles.