andard biomass dryers can process MSW and RDF, but they cannot run these mixed waste materials directly without proper pre-treatment and equipment adjustments. Many plant owners assume the same dryer used for wood chips or crop residues works straight away for municipal solid waste and refuse-derived fuel, and this mistake often leads to frequent blockages, uneven drying and premature machine wear.

MSW and RDF are highly heterogeneous. They contain organics, plastic, textile, stones and metal scraps, with unstable moisture levels that can jump from 30% to over 50%. Unlike uniform biomass feedstock, sharp hard debris will scratch the dryer shell and damage feeding screws. Plastic fragments also tend to melt and stick to the inner drum surface under high heat, causing material buildup and fire risks.

Before feeding into the biomass dryer, you must add sorting, shredding and metal removal steps. Remove heavy inert waste first, then shred the material into consistent particle size. Adjust feeding speed and air flow to match fluctuating moisture. Low-temperature drying settings are preferred to avoid plastic melting and reduce harmful volatile emissions.

With these upgrades, a biomass dryer can lower MSW/RDF moisture down to 15–20%, raising calorific value for briquetting, pelleting or cement kiln combustion. If you plan continuous large-scale RDF production, you need to reinforce the dryer internal lining and install anti-blockage feeding systems.

In short, biomass dryers are viable for MSW and RDF projects, but raw mixed waste is not suitable for direct feeding. Pre-sorting and equipment modification are mandatory to maintain stable operation and extend service life.