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Key Concepts

Natural Cycles: Water, Minerals (Nutrient), Carbon, Life

Holistic Thinking

Soil Foodweb

Humus from Compost

   Why use slower/lower drum speeds and how does that affect the compost quality?

  • Decomposition of varying feedstocks may benefit from specific rpm.
  • Differing time frames (number of days along) during the composting cycle may suggest differing speeds.
  • Equipment does not make compost, microbes do. The optimum drum speed and tine shape can provide the ideal environment for beneficial microbes to flourish.
  • Drum speed and tine shape should lift, blend, and aerate compost feedstocks rather than cut, shred, and pulverize.
  • High drum speeds retard, rather than accelerate, the composting process.
  • Aggregation for crumb structure and humus development are limited when high drum speeds or a pulverizing approach are used.
  • A perfect turn should move center materials to the perimeter and perimeter materials to the center of the windrow. Aeromaster turners do this rather than bouncing them off a hood or curtain.
  • A perfect turn should get oxygen into the windrow and most carbon dioxide out. Respiration tests in front of and behind an Aeromaster turner will demonstrate the quality of this exchange.
  • Lower drum speeds reduce maintenance costs as stress is reduced throughout the turner.
  • Safety is enhanced as the risk of projectiles flying from the pile is largely eliminated.