In this contribution the study of recycling technology for plastic wastes and material valorization by briquetting technology is described. Various type of wastes (wood, carton, paper, plastic, textile) were processed by two-shaft and single-shaft shredders to obtain the output product 1-2 millimeters, which is suitable for briquetting process. For samples manufacturing the briquetting equipment developed in Slovak University of Technology in Bratislava was used. The briquettes were pressed from 5 different samples of compounded material containing plastic, carton, textile, wood and other type of waste material. Technological test showed that briquetting of the municipal waste the higher pressing temperature and compacting pressure should be applied. For quality evaluation of the manufactured briquettes the density and strength properties were determined. The mechanical strength of briquettes from refuse derived fuels increased after mixing it with wood and paper wastes. The influences of the different parameters (fraction size, moisture content, compacting pressure and temperature) to briquette quality were presented