Acceptable Feedstocks  

Flexible Feedstock Options 

The majority of organics solutions require the generator to source separate the organics into a specialized container. The reality is inert contamination will be found in this feedstock. The upfront removal of this contamination is a key strength and differentiator of the BTA® Process. Alternatively, some jurisdictions look to implement solutions that will harvest the organics from an unsorted, mixed waste stream.
 
The BTA® Process delivers appropriate processing solutions for: 
 

1.  Source Separated Organics (SSO) Processing : The hydromechanical pre-treatment steps in the BTA® Process are uniquely designed to remove contaminants upfront and allow for the economic conversion of the organic contents into reusable products. Inert contamination up to 20% can be hydromechanically managed.

 

 2.  Mixed Waste (MW) Processing : MW processing is often referred to as “mechanical biological treatment” (MBT). Extending the BTA hydromechanical pre-treatment front end with a third party mechanical dry pre-treatment configuration creates a flexible, integrated, and scalable MBT solution.  The primary mechanical pre-treatment extension choices include:

 

Mechanical Separation Trommel :  The purpose of the trommel is to free the waste and expose it to the process.  The organics and fine material resident in the waste falls through the screen and onto a conveyor.
 
Bag Breaking System :  If the waste is delivered in plastic bags, a bag breaker could be implemented. Lining of the green bins reduces the need to wash them, and this method has proven to be successful in driving high acceptance and participation rates.
 
Mini- Material Recovery Facility (Mini-MRF) :  Magnetic and eddy current separators, manual picking methodologies, densification and other MRF type systems can be used to supplement the recovery of recyclables and remove contaminants.  

 

Targeted Materials For Conversion

Source separation is the typical approach to the diversion and collection of organics. The materials acceptable for source separation and digestion are outlined below. In a mixed waste scenario, these are the elements that would be harvested from the mixed feedstock.  

 

 MSW Material Targeted For Conversion

Category

Acceptable Materials List

      Food
      Scraps                 
  • Including fresh, frozen, dried, cooked, prepared & leftovers such as:
    • Fruit & vegetable scraps
    • Meat & fish products including skins, fat & entrails
    • Pasta, bread & cereals
    • Dairy products & eggshells
    • Coffee grinds & filters & tea bags
    • Candy & confectionery products
      Paper
      Fibres      
  • Soiled paper towels, tissues, napkins
  • Soiled paper food packaging items which could include
    • Newspaper (e.g..: fish & chip/ corn husking wrap)
    • Cardboard & boxboard (e.g.: frozen pizza base / food take out carton)             
    • Mixed papers (e.g.: paper candy wrapper/ microwave popcorn bag)
    • Molded pulp (e.g.: egg carton, carry out tray)
    • Kraft paper (e.g.: meat wrap)
    • Polycoated containers (e.g.: microwave paper trays, ice cream box)
      Sanitary
  • Disposable diapers
  • Personal hygiene products
  • Incontinence products
      Miscellaneous  
  • House plants, including plant material & soil
  • Pet waste & litter or bedding
      Commercial
      Sources
  • All of the above, plus
    • Organic Sludges & Slurries (label and brewery pulps, filtration, etc.)
    • Glycol & Other Alcohols
    • Slaughterhouse Slurries
    • Food Processing Residues
    • Waste Water Treatment Biosolids

 

Delivering Generator Ease Of Use To Maximize Diversion Achievements

The Opportunity

The BTA system capabilities create an environment for the generator to utilize plastic liners in their collection containers to reduce the greatest barrier to use in an organics diversion program, the “wet factor”. This feature delivers industry leading participation and organic capture rates allowing users to maximize their diversion rate, measured at the landfill.  
 

Patented Capability & Results

The equipment that supports the plastic liner capability is the BTA hydromechanical wet pre-treatment front end. Two integrated, patented pieces of equipment, the BTA® Waste Pulper and the BTA® Grit Removal System (GRS), can effectively process the bag contents and strip away the plastic bag liners.
 

Tough To Process Materials

This unique functionality also supports the acceptance of compound products such as disposable diapers, personal hygiene products and packaging where organic elements exist in their structure. The inert fraction of these types of materials is removed up front to maintain downstream product quality.