Treatment of Alkaline Wastewater from Lignite-Fired Power Plants

Given are characteristics of, and treatment methods for, alkaline wastewaters from the hydrotransport of the fly ash from a lignite-fired power plant. The principal component of the fly ash is CaO. The impact of this type of waste on the aquatic environment is considered. Two treatment procedures ar...

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Veröffentlicht in:Water science and technology 1983-01, Vol.15 (11), p.155-162
Hauptverfasser: Dziubek, Andrzej M, Kowal, Apolinary L
Format: Artikel
Sprache:eng
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Zusammenfassung:Given are characteristics of, and treatment methods for, alkaline wastewaters from the hydrotransport of the fly ash from a lignite-fired power plant. The principal component of the fly ash is CaO. The impact of this type of waste on the aquatic environment is considered. Two treatment procedures are tested - CO2 recarbonation and aeration. The aeration of alkaline wastewaters yields good treatment efficiencies, bringing about the precipitation of calcium carbonate. Determined is the relationship between the duration of the treatment process and the chemical composition of the wastewater, as well as the aeration time required to achieve the desired decrease of the alkalinity and pH levels.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1983.0083