http://www.vocabularyserver.com/gemet/en/http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=879biological waste treatment http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=879 biodegradation RT http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=879 anaerobic treatment NT http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=879 aerobic treatment NT http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=879 waste treatment BT