Szukana fraza: [Abstract = "Lime\-aided conditioning of backwash waters containing aluminium compounds caused dissolution of Al\(OH\)3 to Al\(OH\)4 and increased aluminium and suspended solids concentratian as well as turbidity of the supernatant and, as a result, proved disadvantageous. Thus, regarding the protection of surface waters, lime conditioning should only be employed to intensify the process of thickening of backwash water from groundwater treatment when the permissible pH value of the supernatant discharged to surface waters is not exceeded."]

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