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activated sludge
agric., chem.	cienos activados
environ.	fangos activados; lodos activados; lodo activado
life.sc., environ.	fango activado; lodo activo
water.suppl.	precipitado activado
activated sludge Sludge that has been aerated and subjected to bacterial action; used to speed breakdown of organism matter in raw sewage during secondary waste treatment
environ.	lodos activados

activated-sludge: 14 phrases in 3 subjects

Earth sciences	1
Environment	10
Life sciences	3