Sludge drying leads to organic nitrogen mineralization

Sludge drying leads to volatisation and removal of part of nitrogen contained in sludge. Removed nitrogen is usually condensed and recirculated to activated sludge process. It is assumed that mass of volatised nitrogen is equal to mass of soluble nitrogen in sludge. However results obtained from ful...

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Bibliographic Details
Main Authors: Kokurewicz, Łukasz, Janiak, Kamil, Zięba, Bartosz
Format: Conference Proceeding
Language:English
Subjects:
Activated sludge
Activated sludge process
Driers
High temperature
Mineralization
Nitrogen
Organic nitrogen
Sludge
Sludge drying
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Summary:Sludge drying leads to volatisation and removal of part of nitrogen contained in sludge. Removed nitrogen is usually condensed and recirculated to activated sludge process. It is assumed that mass of volatised nitrogen is equal to mass of soluble nitrogen in sludge. However results obtained from full-scale drying facility shows that mass of volatised nitrogen is 100% higher than mass of soluble nitrogen. It is suspected that nitrogen mineralization occurs due to high temperature maintained in dryers (> 220°C). These results are important as higher mass of nitrogen in condensate makes its removal economically reasonable. This paper shows results of nitrogen mass balance of full-scale drying facility.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/20184400071