Full stream processing technique
This is a high technology separation technique, which processes all components of municipal waste. The materials recovered by this process tend to be of lower quality than those recovered or source separated in MRF because the former is a mix of various types of wastes. To achieve a better quality, the materials obtained through the full stream processing must be cleaned, which is a costly process. However, this technique remains attractive because it does not require source separation, and it isused in the following applications:
(i) Refuse derived fuel (RDF) preparation: In this application, it is used to extract the
combustible portion of munic ipal waste.
(ii) Municipal waste comp osting: In this application, it is used to concentrate
the compostable portion of m unicipal solid waste. Note that this is sometimes performed
as part of RDF preparation.
(iii) Material recovery: In this application, it is used to recover and resell certain
materials, and thereby makin g material recovery a recycling technology as well. In full
stream processing, dependin g on the facility design, the materials are separated either mechanically or by hand, and size and weight are the main characteristics used to
separate the materials.
ü when the material is dumped, oversized materials such as furniture, etc., are removed;
ü rotating screens are used to separate materials of different siz es (small and large);
ü ferrous material is extracted using a magnet system;
ü air classifier is us ed to separate the lighter material;
ü light materials including plastic and paper are further processed into RDF;
heavy fraction is mechani cally or manually sorted to recover sale able materials such as cardboard, etc.