Compost Aeration and Heat Recovery Presentations & Open House

10:30am – 2:30pm
Registration Fee: $20; Cash or check (made out to CAV) accepted at the door.
Location: VFW Post 7823, 530 Exchange St, Middlebury, VT [Directions]

Compost windrows on the new VNAP working pad in November 2017 with Agrilab Technologies Hot Box 250-R CAHR unit at left

Farmers, solid waste and energy professionals, agency staff, policy makers and other interested individuals are invited to attend this event on advanced composting practices of compost aeration and heat recovery (CAHR).  Presentations on the economics, technologies and impact of composting and compost use from:

  • Matt Smith, Ph.D., University of New Hampshire’s Organic Dairy Research Farm
  • Robert Foster, VT Natural Ag Products
  • Brian Jerose, Agrilab Technologies Inc.
  • Juan Alvez, Ph.D. , UVM Center for Sustainable Agriculture

The presentations will be followed by a guided tour at the Foster family’s VT Natural AgProducts (VNAP) composting facility, featuring the CAHR systems installed in 2016 and 2017. VNAP makes Moo Doo and other compost and soil products.

The CAHR systems at VT Natural Ag Products improved compost process efficiency and reduced fossil fuel consumption. Renewable thermal energy is generated and utilized on site using the CAHR systems. The site operators and technical partners will describe the design, construction, operating details and lessons learned. Cost-share funding for the projects have been provided by USDA Rural Development – Rural Energy for America Program, VT Clean Energy Development Fund and the Closed Loop Foundation with support of the Walmart Foundation.  Site tours are on a guided basis only.

Registration is $20 and includes lunch.

The full agenda is available here.

For more information please contact: or

Steam is released after turning the compost windrows. With CAHR, the majority of steam is drawn by negative aeration into specialized equipment and renewable thermal energy is utilized to heat a building, dry products and accelerate the composting process.

Register Now

* indicates required

To request a disability-related accommodation to participate in this program, please contact Juan at or 802-656-6116 by May 2nd so, we may assist you.

UVM Extension helps individuals and communities put research-based knowledge to work.  Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the United States Department of Agriculture. University of Vermont Extension, and U.S. Department of Agriculture, cooperating, offer education and employment to everyone without regard to race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, and marital or familial status.

Event partners include:

VT Natural Ag Products, Agrilab Technologies Inc., UVM Extension, UNH Extension, VT Agency of Agriculture, Food and Markets, and Composting Association of Vermont.


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