forced aeration

Some residential systems require forced aeration units which will increase maintenance and operational costs.

The most common methods of composting are windrow, forced aeration and in vessel.

With composting systems which used forced aeration the rate and volume of throughput air is the primary factor to be considered.

Air injection, or forced aeration, is accomplished by forcing or drawing air through the composting mass.

In biodrying processes, the drying rates are augmented by biological heat in addition to forced aeration.

Active composting in stationary piles with forced aeration (CompostAir system)

Septic tanks can be coupled with other onsite wastewater treatment units such as biofilters or aerobic systems involving artificially forced aeration.

Of the composting technologies, the turned windrow and forced aeration methods are usually classified as "open" systems as typically they are not contained in a structure.

Aerated pile method - Method of composting for the decomposition of organic waste material where the wastes are heaped in separate piles and forced aeration provides oxygen.

For sulphide ore, the company has developed a forced aeration system that supplies low pressure air to the base of a heap, which helps to promote bacterial oxidation reactions in the heap.

It has been found that this system, using positive pressure forced aeration, provides a more even temperature distribution within the pile and more consistent composting than the earlier used Beltsville aerated pile method (2,3).

In some composting systems known as in-vessel composting systems (IVC), also used to compost material potentially containing animal by-products, the composting process is enclosed and sometimes uses forced aeration, but the material is not turned.

In large-scale systems, forced aeration is accompanied with a computerized monitoring system responsible for controlling the rate and schedule of air delivery to the composting mass, although meters and manual monitoring techniques may also be used in smaller scale operations.

While the ability of induced or forced aeration to reduce or eliminate cavitation has been known for many years, it is only in relatively recent times that the aeration mechanism has been used to this advantage on spillways subject to high velocity flow.

With support from the Canadian Mushroom Growers’ Association, the Ontario Ministry of Agriculture, Food and Rural Affairs and Rol-Land Farms, Fleming tested two substrate treatment methods, including enhanced composting – a method involving a covered system complete with mechanical turning and forced aeration.