The DMAIC Method in Six Sigma
Let's assume you've gathered all your shredded "greens" and "browns" and are ready for some serious composting action. I like to mix these two main ingredients together before tossing them into the pile. Place a layer of mixed material 4" to 6" deep on the foundation pallet of your new, high-efficiency, low-cost, no-turn composting bin. Make certain that the material's moisture level is adequate (it should feel like a wrung-out kitchen sponge) and do not press the layer down. Place two of your perforated aeration pipes on top of this layer so the cut ends protrude through the side pallets. Space a pipe about 16" in from each side so, when you look down at the layer's surface, it looks as if it's been divided into thirds. Recall that I suggested making the boards in your pallet walls stand vertical. Perforated aeration pipes can now slide down freely as the pile settles during the accelerated composting process. Had those boards been placed horizontal, your pipes would have hung up, bent--and possibly "kinked"--in a short time. You can guess what that'll do to the flow of air into the pile.
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Now it's time for a second six-inch layer of shredded material followed by a second set of perforated pipe at right angles to the ones in layer #1, below. Continue, layer by layer, adding another set of pipes to each layer as you go, until you've reached the top (and the end of your supply of pipes). Remember to alternate the direction of each layer of perforated pipes. It is not necessary to install aeration pipes above the top layer. But it is recommended that you lay on an additional 4" or 5" layer of some coarse, insulating organic material like pine needles or whole leaves. This insulating layer allows generated heat to penetrate all the way to the top of your mixed material, thereby destroying most--if not all--weed seeds, undesirable insects, and plant pathogens.