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Biodegradation of a high-strength wastewater containing a mixture of ammonium, aromatic compounds and salts with simultaneous nitritation in an aerobic granular reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
34166 45007 2016 9 PDF Available
Title
Biodegradation of a high-strength wastewater containing a mixture of ammonium, aromatic compounds and salts with simultaneous nitritation in an aerobic granular reactor
Abstract

•Nitritation and biodegradation of aromatics were achieved in a granular reactor.•Comamonas and Nitrosomonas were the main genera in the aerobic granules.•Stable mature aerobic granules were maintained 390 days in a continuous reactor.•Aerobic granular reactors are a promising technology for complex wastewaters.

Long-term operation (390 days) of a continuous airlift reactor with aerobic granular biomass was successfully applied to treat a highly complex wastewater composed of: ammonium (1000 mg N L−1), o-cresol (100 mg L−1), phenol (100 mg L−1), quinoline (50 mg L−1) and salts (16 g salts L−1). High nitrogen loading rate (1.1 g N L−1 d−1) and organic loading rate of 0.7 (g COD L−1 d−1) were achieved for the simultaneous nitritation and complete biodegradation of the aromatic compounds. The successful operation of the granular airlift reactor can be related to (i) the growth of specialized microorganisms in the aerobic granules and (ii) the continuous feeding regime. Aerobic granules were maintained stable in spite of the high salinity conditions. Dissolved oxygen (DO) concentration and DO/ammonium concentrations ratio were the key parameters to select a suitable effluent for anammox or heterotrophic denitrification via nitrite. Besides, nitrous oxide emissions were related to the DO concentration in the reactor.

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Keywords
Partial nitrification; Phenolic compounds; Salinity; Nitrous oxide
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Biodegradation of a high-strength wastewater containing a mixture of ammonium, aromatic compounds and salts with simultaneous nitritation in an aerobic granular reactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 51, Issue 3, March 2016, Pages 399–407
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us