Long-term performance and microbial characteristics of the anammox-enriched granular sludge cultivated in a bench-scale sequencing batch reactor
PBN-AR
Instytucja
Wydział Inżynierii Lądowej i Środowiska (Politechnika Gdańska)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
BIOCHEMICAL ENGINEERING JOURNAL (35pkt w roku publikacji)
ISSN
1369-703X
EISSN
Wydawca
DOI
URL
Rok publikacji
2017
Numer zeszytu
Strony od-do
125-135
Numer tomu
120
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
ANAMMOX CANDIDATUS BROCADIA GRANULAR SLUDGE MICROBIAL COMPOSITION METAGENOMICS SEQUENCING BATCH REACTOR
Streszczenia
Język
Treść
The anammox-enriched granular sludge was successfully formed during the long-term biogranulation experiment lasting over 330 days. The cultivation was conducted at 30 ◦C in a 10-L sequencing batch reactor (SBR) fed with synthetic medium containing ammonia, nitrite and trace elements. The properties of the developed granules were investigated in terms of the biomass activity (including the growth rate of anammox bacteria), size distribution of the granules as well as nitrogen removal performance and pathways. The compositions of the microbial communities in the inoculum sludge and ultimate granules were compared using the metagenomic analysis. The mean particle size of the biomass increased from 290 m (inoculum sludge) to 728 m (ultimate granules). The overall nitrogen removal rate (NRR) and specific anammox activity (SAA) reached themaximumvalue of 5.3 kg Nm−3 d−1 and 1.6 kg NkgVSS−1 d−1, respectively. In the matured granules, Planctomycetes were the most abundant phylum (aprox. 44% of total 16S rRNA reads), exclusively represented by Candidatus Brocadia. Based on the 16S rRNA reads frequency derived from Planctomycetes in the total metagenomic library and volatile suspended solids (VSS) concentrations of the inoculum sludge and ultimate granules, the observed specific growth rate of anammox bacteria was estimated at 0.14 d−1 over the entire study period.
Inne
System-identifier
140158
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