Conditioning, biotreatment and composting of construction and demolition debris fines

A method for processing raw fines materials, comprising:

• screening the raw fines materials to Grade 1 comprising fines materials of a size of at most about 5 mm and Grade 2 comprising fines materials of a size larger than about 5 mm;
• and one of:
• A) bio-oxydating organic contaminants of the Grade 1;
• wherein said A) bio-oxydating organic contaminants of the Grade 1 comprises:
• adding and mixing organic amendment and maintaining a temperature of about 35° C., a water content in a range between about 10 and about 20% v/v and a carbon/nitrogen ratio of about 20, in aerobic conditions;
• and monitoring a content of organic contaminants until the content of organic contaminants reaches a target content;
• B) composting the Grade 1;
• wherein said B) composting the Grade 1 comprises:
• a pasteurization step, said pasteurization step comprising:
• adding and mixing organic amendment, in aerobic conditions until reaching a temperature in a range between about 50 and about 70° C.;
• monitoring a moisture content, maintaining a carbon/nitrogen ratio of at least about 20;
• and monitoring pathogens content and respiration rate
• upon detection of absence of pathogens at a predetermined respiration rate, thereby initiating a stabilization step;
• C) processing the Grade 1 into filler for resin composites,
• wherein said C) processing the Grade 1 comprises, providing target filler properties requirement of a resin composite, selecting a combination of a resin and a Grade 1 of chemical affinity with the resin and according to the moisture content of the Grade 1, selecting a ratio between the Grade 1 as a filler and the resin;
• and mixing the Grade 1 with the resin composite at the selected ratio;
• D) separating the Grade 2 into alight stream and a heavy stream based on at least one of a composition and a weight of the particles;
• and
• E) processing the heavy stream into filler for resin composites by, providing target filler properties requirement of a resin composite, processing the heavy stream to decrease particles sizes;
• selecting a ratio between the heavy stream as a filler and the resin;
• and mixing the heavy stream with the resin composite at the selected ratio;
• wherein said screening the raw fines materials comprises selecting a screen geometry depending on a water content of the raw fines materials.