Promoting sludge quantity and activity results in high loading rates in Anammox UBF

Response of performance of an anammox anaerobic baffled reactor (ABR) to changes in feeding regime

“…After 213 days of normal feeding cultivation, the EPS in the four compartments C1-C4 was 127.5, 109.8, 39.3, and 53.2 mg g VSS À1 , respectively, while the contents of the EPS reached 146.7, 113.6, 102.4, and 93.4 mg g À1 VSS after cultivation with split-feeding. As reported previously, the EPS contributed to granule formation (Chen et al, 2010a). In this study, as EPS content increased, the corresponding granule diameter also increased ( Table 2).…”

Kinetic characteristics and microbial community of Anammox-EGSB reactor

“…The theoretical maximum specific nitrogen conversion rate was 731.7 mg N/(gVSS d), which was in the range of 163-1800 mg N/(gVSS d) as reported in the literature [6,10,24,25]. The actual nitrogen specific conversion rate was 572 mg N/(gVSS d) with actual value to theoretical value ratio of 0.783, which indicated that the tested Anammox granular sludge still had potential Anammox activity.…”

Influence of the type and source of inoculum on the start-up of anammox sequencing batch reactors (SBRs)

“…[10] On the other hand, another recent study demonstrated that the modification of a SBR as MBR (membrane bioreactor) with the installation of an external membrane module resulted in SAA being accelerated 19 times. [34] The acceleration of SAA with MBR was further confirmed by starting-up another MBR for a 242 day period. Molecular microbial analyses showed that Candidatus "Brocadia anammoxidans" and Candidatus "Kuenenia Stuttgartiensis" were the dominant species in the inocula and biomass developed in the reactor.…”

“…[35] Granulation and biofilm formation contributed to biomass enrichment, while appropriate recirculation as well as an appropriate temperature (35 • C) helped to promote specific anammox activity. [34] Figure 4a also shows the occurrence of an accumulation of NH 4 + in the process effluent, which is due to the use of a NO 2 − N/NH 4 + N molar ratio a little lower than the stoichiometric value. This accumulation could probably have been avoided if operated with the stoichiometric ratio.…”