... sawdust, wood, rice husk, coconut shell & other woody material into briquette, which can be used in boiler, heating & warming. After ... used in BBQ. Production process1. Crushing the raw materials into size no bigger than 5mm. (wood, wood branch, coconut shell, peanut shell, ... of the biomass. The lignin content that occurs naturally in biomass is liberated under high pressure and temperature. Lignin ...