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| Subject | English | Maltese |
| life.sc., environ. | activated sludge | ħama bijoloġika |
| environ. | 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 | tajn attivat |
| life.sc., environ. | activated sludge | ħama attivata |
| life.sc. | modified semi-continuous activated sludge test | test SCAS modifikat |
| life.sc. | semi-continuous activated sludge test | test SCAS |
| life.sc. | semi-continuous activated sludge unit | unità semikontinwa għall-ħama attivat |