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Recovery of phosphorus and aluminium from sewage sludge ash by a new wet chemical elution process (SESAL-Phos-recovery process)

Petzet, Sebastian and Peplinski, Burkhard and Bodkhe, S.Y. and Cornel, Peter (2011):
Recovery of phosphorus and aluminium from sewage sludge ash by a new wet chemical elution process (SESAL-Phos-recovery process).
In: Water Science and Technology, IWA Publishing, pp. 693-699, 64, (3), [Article]

Abstract

The potential of a new wet chemical process for phosphorus and aluminium recovery from sewage sludge ash by sequential elution with acidic and alkaline solutions has been investigated: SESAL-Phos (sequential elution of sewage sludge ash for aluminium and phosphorus recovery). Its most innovative aspect is an acidic pre-treatment step in which calcium is leached from the sewage sludge ash. Thus the percentage of alkaline soluble aluminium phosphates is increased from 20 to 67%. This aluminium phosphate is then dissolved in alkali. Subsequently, the dissolved phosphorus is precipitated as calcium phosphate with low heavy metal content and recovered from the alkaline solution. Dissolved aluminium is recovered and may be reused as a precipitant in wastewater treatment plants

Item Type: Article
Erschienen: 2011
Creators: Petzet, Sebastian and Peplinski, Burkhard and Bodkhe, S.Y. and Cornel, Peter
Title: Recovery of phosphorus and aluminium from sewage sludge ash by a new wet chemical elution process (SESAL-Phos-recovery process)
Language: English
Abstract:

The potential of a new wet chemical process for phosphorus and aluminium recovery from sewage sludge ash by sequential elution with acidic and alkaline solutions has been investigated: SESAL-Phos (sequential elution of sewage sludge ash for aluminium and phosphorus recovery). Its most innovative aspect is an acidic pre-treatment step in which calcium is leached from the sewage sludge ash. Thus the percentage of alkaline soluble aluminium phosphates is increased from 20 to 67%. This aluminium phosphate is then dissolved in alkali. Subsequently, the dissolved phosphorus is precipitated as calcium phosphate with low heavy metal content and recovered from the alkaline solution. Dissolved aluminium is recovered and may be reused as a precipitant in wastewater treatment plants

Journal or Publication Title: Water Science and Technology
Volume: 64
Number: 3
Publisher: IWA Publishing
Uncontrolled Keywords: aluminium phosphate, calcium phosphate, phosphorus recovery, sewage sludge ash
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute IWAR
13 Department of Civil and Environmental Engineering Sciences > Institute IWAR > Wastewater Technology
13 Department of Civil and Environmental Engineering Sciences
Date Deposited: 27 Jun 2017 10:04
Additional Information:

DOI: 10.2166/wst.2011.682

Identification Number: doi:10.2166/wst.2011.682
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