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Design of fine-bubble aeration systems for municipal WWTPs with high sea salt concentrations

Sander, Stephan ; Behnisch, Justus ; Wagner, Martin :
Design of fine-bubble aeration systems for municipal WWTPs with high sea salt concentrations.
In: Water Science and Technology, 75 (7) S. 1555-1563. ISSN 0273-1223
[Artikel] , (2017)

Kurzbeschreibung (Abstract)

The impact of sea salt on the aeration coefficient kLa of fine-bubble aeration systems was investigated in clean water and in a model substance for simulating activated sludge. The investigations were carried out at laboratory and pilot scale. Sea salt was dosed in the form of artificial seawater, real seawater or simplified, by adding NaCl. The investigated media showed an increase of kLa with rising sea salt concentrations up to 10 g/L. The ratio between kLa and sea salt concentration is impaired by the air flow rate and the type of applied diffusers. Literature data show that the favourable effect of sea salt on kLa can also be found in the activated sludge of conventional municipal wastewater treatment plants. The results of this study allow the derivation of salt correction equations to be used in the design of fine-bubble aeration systems for taking into account the favourable impact of sea salt on kLa. By that means, a more precise design of respective systems will be enabled.

Typ des Eintrags: Artikel
Erschienen: 2017
Autor(en): Sander, Stephan ; Behnisch, Justus ; Wagner, Martin
Titel: Design of fine-bubble aeration systems for municipal WWTPs with high sea salt concentrations
Sprache: Englisch
Kurzbeschreibung (Abstract):

The impact of sea salt on the aeration coefficient kLa of fine-bubble aeration systems was investigated in clean water and in a model substance for simulating activated sludge. The investigations were carried out at laboratory and pilot scale. Sea salt was dosed in the form of artificial seawater, real seawater or simplified, by adding NaCl. The investigated media showed an increase of kLa with rising sea salt concentrations up to 10 g/L. The ratio between kLa and sea salt concentration is impaired by the air flow rate and the type of applied diffusers. Literature data show that the favourable effect of sea salt on kLa can also be found in the activated sludge of conventional municipal wastewater treatment plants. The results of this study allow the derivation of salt correction equations to be used in the design of fine-bubble aeration systems for taking into account the favourable impact of sea salt on kLa. By that means, a more precise design of respective systems will be enabled.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Water Science and Technology
Band: 75
(Heft-)Nummer: 7
Verlag: IWA Publishing
Fachbereich(e)/-gebiet(e): 13 Fachbereich Bau- und Umweltingenieurwissenschaften
13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut IWAR - Wasser- und Abfalltechnik, Umwelt- und Raumplanung
13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut IWAR - Wasser- und Abfalltechnik, Umwelt- und Raumplanung > Fachgebiet Abwassertechnik
Hinterlegungsdatum: 06 Sep 2017 14:12
DOI: 10.2166/wst.2017.027
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