NDLI: Autotrophic nitrogen removal after ureolytic phosphate precipitation to remove both endogenous and exogenous nitrogen.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Desmidt, E. Monballiu, A. De Clippeleir, H. Verstraete, W. Meesschaert, B. D.
Description	Country affiliation: Belgium Author Affiliation: Desmidt E ( Department of Industrial Sciences and Technology, Katholieke Hogeschool Brugge-Oostende, Associated to the Katholieke Universiteit Leuven as Faculty of Industrial Engineering Sciences, Zeedijk 101, Oostende, Belgium. evelyn.desmidt@khbo.be)
Abstract	Anaerobic digestion yields effluents rich in ammonium and phosphate and poor in biodegradable organic carbon, thereby making them less suitable for conventional biological nitrogen and phosphorus removal. In addition, the demand for fertilizers is increasing, energy prices are rising and global phosphate reserves are declining. This requires both changes in wastewater treatment technologies and implementation of new processes. In this contribution a description is given of the combination of a ureolytic phosphate precipitation (UPP) and an autotrophic nitrogen removal (ANR) process on the anaerobic effluent of a potato processing company. The results obtained show that it is possible to recover phosphate as struvite and to remove the nitrogen with the ANR process. The ANR process was performed in either one or two reactors (partial nitritation + Anammox). The one-reactor configuration operated stably when the dissolved oxygen was kept between 0.1 and 0.35 mg L(-1). The best results for the two-reactor system were obtained when part of the effluent of the UPP was fully nitrified in a nitritation reactor and mixed in a 3:5 volumetric ratio with untreated ammonium-containing effluent. A phosphate and nitrogen removal efficiency of respectively 83 ± 1% and of 86 ± 7% was observed during this experiment.
File Format	HTM / HTML
ISSN	02731223
Issue Number	7
Volume Number	67
e-ISSN	19969732
Journal	Water Science & Technology
Language	English
Publisher	IWA Publishing
Publisher Date	2013-01-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Hydrology Bioreactors Phosphates Isolation & Purification Quaternary Ammonium Compounds Waste Water Chemistry Autotrophic Processes Industrial Waste Solanum Tuberosum Waste Disposal, Fluid Evaluation Studies Journal Article
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Water Science and Technology

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