Partners in industrial composting
Whether processing municipal green waste, agricultural residues, food waste or commercial organics, effective feedstock preparation is essential for producing high-quality compost efficiently and consistently. However, inconsistent organic feedstocks make it difficult to achieve a uniform, stable and efficient composting process.
The KEENAN ProMix is designed to thoroughly blend a wide variety of compost feedstocks into a uniform mixture, helping operators achieve the ideal conditions for aerobic composting while minimising segregation and improving process consistency.
Industrial composting mixers
The KEENAN ProMix is a pre-processing industrial compost mixer that creates a stable, homogeneous feedstock blend for Phase I composting. By ensuring a uniform structure, it gives microorganisms consistent access to nutrients and oxygen, which accelerates decomposition and improves final compost uniformity.
FEEDSTOCK HOMOGENEITY
The paddle-mixing system evenly distributes nutrients, structural materials, bulking agents and moisture for efficient microbial activity.
OPERATIONAL EFFICIENCY
Available in 14- to 28-cubic-metre capacity options, the KEENAN ProMix delivers on high throughput processing at a low energy demand.
ODOUR
REDUCTION
The homogeneous mix produced from the machine helps reduce the risk of anaerobic pockets that can lead to odours and slower decomposition.
FEEDSTOCK HANDLING
Whether processing green waste, food waste or manures, the counter-flow movement ensures mix homogeneity with no dead spots.
Composting for mushroom growers
In large-scale mushroom compost production, consistency is critical. The KEENAN ProMix is designed to help growers transform variable raw materials into a uniform, process-ready substrate that supports stable and efficient composting performance.
Mushroom compost relies on precise blending of materials such as straw, poultry litter, gypsum and other organic inputs. The KEENAN ProMix delivers a consistent, homogeneous mix that helps maintain the structure, aeration and moisture balance required for reliable Phase I and Phase II composting.
Built to handle the realities of industrial composting, it accommodates variable feedstocks while maintaining consistent output quality batch after batch. This helps reduce process variability and supports more predictable composting conditions at scale.
With high throughput capacity and efficient energy use per tonne processed, the KEENAN ProMix is engineered for continuous industrial operation. Its effective mixing and controlled discharge help maintain steady material flow into downstream composting systems, reducing bottlenecks and improving overall plant efficiency.
The result is a more consistent mushroom composting process — from raw materials to finished substrate.
Interested in the KEENAN ProMix?
Every project begins with an on-site assessment and systems review, where our team works closely with operational personnel and design contractors to evaluate the production process, identify requirements and develop a tailored implementation strategy.
Each KEENAN ProMix is then custom engineered and manufactured to integrate seamlessly into the existing operation.
Our structured service agreements provide continuous mechanical and technical support, helping to maintain optimal performance and ensure long-term operational reliability. Emergency support is available 24/7, 365 days a year.