Full-scale phosphorus recovery from digested waste water sludge in Belgium - part I: technical achievements and challenges

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Adrien MarchiV Christine

Abstract

To date, phosphorus recovery as struvite in wastewater treatment plants has been mainly implemented on water phases resulting from dewatering processes of the sludge line. However, it is possible to recover struvite directly from sludge phases. Besides minimising the return loads of phosphorus from the sludge line to the water line, placing such a process within the sludge line is claimed to offer advantages such as a higher recovery potential, enhanced dewaterability of the treated sludge, and reduced speed of scaling in pipes and dewatering devices. In the wastewater treatment plant at Leuven (Belgium), a full-scale struvite recovery process from digested sludge has been tested for 1 year. Several monitoring campaigns and experiments provided indications of the efficiency of the process for recovery. The load of phosphorus from the sludge line returning to the water line as centrate accounted for 15% of the P-load of the plant in the reference situation. Data indicated that the process divides this phosphorus load by two. An improved dewaterability of 1.5% of dry solids content was achieved, provided a proper tuning of the installation. Quality analyses showed that the formed struvite was quite pure.

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Citations

Feb 14, 2016·Bioresource Technology·Cédric TarayreFrank Delvigne
Jul 20, 2016·Bioresource Technology·Yuanyao YeDinh Duc Nguyen
Oct 27, 2016·The Science of the Total Environment·Yuanyao YeHui Jia
Mar 10, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Akintunde BabatundeGuoren Xu
Mar 10, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Sam GeertsMarjoleine Weemaes
Jan 11, 2020·Environmental Science and Pollution Research International·Sara ZangariniFabrizio Adani
Dec 9, 2020·Journal of Environmental Management·Bart SaerensMarjoleine Weemaes

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