Bin Process Management

Each “bin” unit at a site is intended to become a “management unit” that the user will operate under the ACT recipe for the most productive and environmentally sound methods for the specific waste being processed. Practices of composting various feedstock is very simple. The following is a representative example of a User installation:

Before any initial loading of the bin, inspect each aeration tube for proper airflow and pressure, insuring no blockage in the Forced-air system.

On the bin floor, construct a base from sawdust or acceptable amendment at least 12” thick. This base will filter out liquids, fats, oils and greases that are present in the waste. It also permits air movement and microbial action underneath the first layer of feedstock. With the sloped floor and sawdust filter excess leachate will be drained and captured for recirculation back into the pile. Then place a layer of feedstock on the sawdust in the rear of the bin. A single layer of feedstock should be placed evenly across the base. Add four to six inches of sawdust/litter mix to the top of each layer of feedstock in order to minimize odors and vectors as well as providing an absorbing layer for the next addition of feedstock. After the first layer of feedstock is added to the bin, turn the control switch for that bin to the “On” position and set the timing for 2 minutes. This aeration will also accelerate the growth of microbes while the bin is being filled.

Once the day’s feedstock has been installed, some applications required adding leachate (if needed) by spraying or soaking the sawdust/litter mix with the accumulated leachate. This step is absolutely critical to getting the process working properly. It is almost impossible to add moisture to a pile after it is built, so do it now. Fill the bin from back to front in a terracing fashion.

Once the bin is completely filed, cover the pile with at least 4-6” of pure sawdust or other carbon-rich source. This cover acts as the Bio-filter for odor control around the pile and insulates the pile to retain heat and reduces fly problems. Odors may be released when an inadequate cover is used or when it is too dry. The released odors may also attract scavenging animals, flies and pets to the pile. Critical: do not add leachate to the top of the pile. Add clean water to the top of the bin only. This will minimize flies and other vectors and varmints.

Increase the timing for that bin to 4 minutes. This aeration cycle time can be adjusted up or down once the material has reached the desired 150°F processing window depending on the situation.