id	keyword
american_scientific_journal-6509	water
american_scientific_journal-6509	cells
american_scientific_journal-6509	samples
american_scientific_journal-6509	apb
american_scientific_journal-6509	srb
american_scientific_journal-6509	oil
american_scientific_journal-6509	bacteria
american_scientific_journal-6509	technology
american_scientific_journal-6509	groups
american_scientific_journal-6509	petroleum
american_scientific_journal-6509	vol
american_scientific_journal-6509	growth
american_scientific_journal-6509	tanks
american_scientific_journal-6509	anaerobic
american_scientific_journal-6509	figure