About: biological filter

Premodifier: biological
Head noun: filter

Same concepts
http://dbpedia.org/resource/Trickling_filter

Broader concepts

label	provenance	confidence
beneficial bacterium	isap:424028361	0.453341
filter	isap:388212215	0.379439

Narrower concepts

label	provenance	confidence
filter	isap:388211673	0.220629
tank	isap:306483437	0.186816