About: http://webisa.webdatacommons.org/33291876

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Washing techniques replaced shot blasting thereby reducing maintenance efforts, and these techniques produced a sludge containing 20 to 40% of vanadium compounds from which vanadium and other metals could be reclaimed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com