Systems and methods directed to oven ventilation for convective cooking and drying of food are presented herein. In one embodiment, a thermal processing apparatus includes: a housing and a powered conveyor belt configured for supporting work products during thermal processing. The conveyor belt is moving along a spiral path arranged as a tiered stack. A recirculation system is configured for directing a thermal processing medium through the tiers of the spiral conveyor in a recirculating flow. An exhaust vent has an inlet proximate to an area of a high moisture content inside the housing. The exhaust vent is configured for exfiltrating the thermal processing medium having the high moisture content. An opening is configured for infiltrating the thermal processing medium from outside of the housing.

Systems and methods directed to oven ventilation for convective cooking and drying of food are presented herein. In one embodiment, a thermal processing apparatus includes: a housing and a powered conveyor belt configured for supporting work products during thermal processing. The conveyor belt is moving along a spiral path arranged as a tiered stack. A recirculation system is configured for directing a thermal processing medium through the tiers of the spiral conveyor in a recirculating flow. An exhaust vent has an inlet proximate to an area of a high moisture content inside the housing. The exhaust vent is configured for exfiltrating the thermal processing medium having the high moisture content. An opening is configured for infiltrating the thermal processing medium from outside of the housing.

A fertilizer/soil conditioner or a fuel source material is formed by processing animal waste by-products through the use of a rotary biomass dryer system. The animal waste by-product includes without limitation manure obtained from cattle or swine; feed lot bedding, poultry litter, a digestate of animal waste by-products obtained from an anaerobic digester, municipal waste, waste meat renderings, waste meat, or a mixture thereof. The processed material may comprise a higher amount of ash and a lower amount of volatile material than the animal waste by-product. The processed material may be stored as a powder or processed into pellets, logs, pucks, briquettes or another convenient shape form.

A fertilizer/soil conditioner or a fuel source material is formed by processing animal waste by-products through the use of a rotary biomass dryer system. The animal waste by-product includes without limitation manure obtained from cattle or swine; feed lot bedding, poultry litter, a digestate of animal waste by-products obtained from an anaerobic digester, municipal waste, waste meat renderings, waste meat, or a mixture thereof. The processed material may comprise a higher amount of ash and a lower amount of volatile material than the animal waste by-product. The processed material may be stored as a powder or processed into pellets, logs, pucks, briquettes or another convenient shape form.

A vibratory round dryer comprises a container that is resiliently supported; and a working passage. A heating device, which is installed at the container, is provided for heating the drying agent and workpieces.

A vibratory round dryer comprises a container that is resiliently supported; and a working passage. A heating device, which is installed at the container, is provided for heating the drying agent and workpieces.