Sentence:  Pelletization is a proven technology for improving biomass properties, whereas <WSD>torrefaction</WSD> is considered a plausible alternative for decreasing the moisture content, increasing the energy density and greatly facilitating the handleability and grindability properties of the torrefied material. 
Meaning of the word marked with <WSD> tags:  Drying or roasting; especially an anaerobic heat treatment to make wood waterproof.