id	keyword
ajpdis-1530	oil
ajpdis-1530	sludge
ajpdis-1530	water
ajpdis-1530	method
ajpdis-1530	phase
ajpdis-1530	journal
ajpdis-1530	extraction
ajpdis-1530	american
ajpdis-1530	process
ajpdis-1530	hydrocarbons
ajpdis-1530	diplomacy