Journal
ENVIRONMENTAL TECHNOLOGY
Volume 36, Issue 2, Pages 214-225Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2014.941946
Keywords
Planctomycetes; deammonification; reject water; AOA; fluidization
Categories
Funding
- [IUT20-16]
- [SLOKT11027T]
- [AR12017]
- [SLOKT12222T]
- [SLOKT12034T]
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Robust start-up of the anaerobic ammonium oxidation (anammox) process from non-anammox-specific seeding material was achieved by using an inoculation with sludge-treating industrial [GRAPHICS] -, organics- and N-rich yeast factory wastewater. N-rich reject water was treated at 20 degrees C, which is significantly lower than optimum treatment temperature. Increasing the frequency of biomass fluidization (from 1-2 times per day to 4-5 times per day) through feeding the reactor with higher flow rate resulted in an improved total nitrogen removal rate (from 100 to 500gm(-3)d(-1)) and increased anammox bacteria activity. As a result of polymerase chain reaction (PCR) tests, uncultured planctomycetes clone 07260064(4)-2-M13-_A01 (GenBank: JX852965) was identified from the biomass taken from the reactor. The presence of anammox bacteria after cultivation in the reactor was confirmed by quantitative PCR (qPCR); an increase in quantity up to similar to 2x10(6)copiesgVSS(-1) during operation could be seen in qPCR. Statistical modelling of chemical parameters revealed the roles of several optimized parameters needed for a stable process.
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