Late last year, Engineered Compost Systems (ECS) began conducting trials at California State University in Fresno to explore using the new patent-pending AC Composter system to manage dairy manure solids and comply with air-quality standards. A two-zone portable pilot system was delivered by ECS and installed at the CSUF’s research dairy. The goal is to determine how well the AC Composter can meet both the demands of a dairy operation and the requirements for air emissions control in California.
Engineered Compost Systems
|Address||4220 24th Ave West, Seattle, WA, 98199, US|
ECS More Tools for Better Composting
Engineered Compost Systems (ECS) designs and manufactures in-vessel and aerated pile compost systems, and provides a wide range of technical services and process components. We specialize in composting biosolids. We combine our proprietary systems with appropriate integration of commodity products resulting in compost systems that are tailored to meet our client needs, made from proven components, and provided at reasonable costs.
Our services include facility design, facility start up, and operator training. After start-up, our staff provides technical assistance via real-time web access to our control systems, long term on-site operational support, and annual facility inspections.
ECS is dedicated to the compost industry and is the most experienced compost process engineering and process system supplier in North America.
The dramatic cost increases in resin pipe, stainless steel and fuel inspired the development of this “pipe-less” aeration floor, called the CompDog. The design relies on the structural holding capacity of compost and a removable and reusable form. Raw compost is placed on top of the CompDog and allowed to settle for 12 to 24 hours. Then the form is removed and the void space (tunnel) that remains is used as an aeration plenum, replacing the need for resin pipe above-grade. CompDogs are designed to withstand the harsh environment of com-posting sites, and are constructed of heavy coated and double-walled polyester material. They can be made to any length up to 90 feet long. Units eliminate resin based above-grade pipe, and the associated labour and maintenance involved with its process. Since the Comp-Dog is removed with the first 24 hours of operation, there are no pipes in the way when it’s time to move a pile.
The dramatic cost increases in resin pipe, stainless steel and fuel inspired the development of this “pipe-less” aeration floor, now called the Comp-Dog. The design relies on the structural holding capacity of compost and a removable and reusable form. Raw compost is placed on top of the CompDog and allowed to settle for 12 to 24 hours. Then the form is removed and the void space (tunnel) that remains is used as an aeration plenum, replacing the need for resin pipe above grade. ECS spent eighteen months of field trials and research finalizing a design that can withstand the rough service found at compost facilities. CompDogs are constructed of heavy coated and double walled polyester material. They can be made to any length up to 90 feet long. Units eliminate resin based above grade pipe, and the associated labour and maintenance involved with its process. Since the CompDog is removed with the first 24 hours of operation, there are no pipes in the way when it’s time to move a pile.
Engineered Compost Systems’ (ECS) latest automated control package includes the implementation and control of reversing aeration, which means alternating automatically between positive or negative aeration modes depending on pile conditions. “We’ve refi ned air handling and offer in one control package: reversing and recirculating aeration, control of fresh air added into the system, and control of the process exhaust air temperature headed out to the biofi lter,” explains Tim O’Neill, ECS President. The reason for reversing the aeration direction is that it keeps the compost pile much more uniform in terms of temperature and humidity. Anytime air is run in one direction (through a compost pile) the point at which air comes in is cooler than the place where it exits, (air heats as it runs through). The initial point of contact is typically close to ambient, whereas the temperature at the exit point could be upwards of 80 degrees C, although 65 to 70 degrees C is more common. It is possible to see as muchas a 60 degree differential from inlet to exit temperatures. Portions of the compost pile could be below thermophilic temperatures while others could be much hotter (and higher temperatures produce more odours). By reversing the aeration at set temperature differentials, the temperature gradient in compost piles becomes more uniform. This is especially important for facilities complying with time and temperature protocols set by regulatory agencies.ECS’s CompTroller real-time feedback system works with a wireless transmitting temperature probe and automatically adjusts fan speeds, controls the volume of air to a given compost-ing zone or vessel, controls the direction of air flow (positive or negative), and controls the percentage of recirculating process air.
Engineered Compost Systems recently redesigned their RF Tele-probe (wireless transmitting temperature probe) using advancements in MESH radio technology. The new Teleprobes operate either on a Point-to-Point (RF Teleprobe to RF Master Receiver), or through one or more repeater MESH nodes, and the Teleprobe extended line-of-sight operating distances are now one kilometre.
The AC Composter is a covered aerated static pile (ASP) composting system designed to provide operators with a cost-effective tool to control odour and maintain “Best- Practice” Oxygen and moisture levels for aerobic composting. The AC Composter combines a fabric cover with ECS’s proven ASP control and aeration technology. These systems provide: near-zero fugitive odour releases; minimized evaporative water losses from the biomass; an effective barrier to vectors (birds, rats, flies); neat, clean and professional looking appearance; and a broad range of aeration rates and process control options.