Services | Residuals & Feedstock

About Composting

compostingComposting is the aerobic decomposition of biodegradable organic matter typically recycling organic household, yard waste and manures into an extremely useful humus-like, soil end-product called compost. Ultimately this permits the return of needed organic matter and nutrients into the food-chain.

Management practices of composting to raise process temperatures speeds up the natural process of decomposition appreciably. The elevated heat results from exothermic processes, and the heat in turn reduces the generational time of microorganisms and thereby speeds the energy and nutrient exchanges taking place. It is crucial to provide as optimal circumstances as possible for large amounts of organic waste to decompose properly. This is especially so when it is accompanied by heating, since at elevated temperatures, oxygen within the piles is consumed more rapidly, and if not controlled, will lead to malodour.

compostingORMI’s slurries contain very high concentrations of carbon (attributable to the fats, oils and greases) which is the basic building block of plant matter and very desirable for compost. Most commercial composting sites can accommodate these organic residuals within certain limits.

The slurries require no processing (unlike yard waste) because the particle size is very small. These slurries are typically pumped onto the piles of other organic matter at the primary mixing point prior to being introduced into the composting windrows. The high fat, oil and grease content limit the amount that can be added.

Its hydrophobic nature makes it difficult to mix with other materials, and can cause it to interfere with moisture and oxygen transfer through the windrows. When properly managed, adding these slurries will speed up the decomposition process and improve composting performance.


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