Impact of Cr(VI) on P removal performance in enhanced biological phosphorus removal (EBPR) system based on the anaerobic and aerobic metabolism

A Novel Process for Nutrients Removal and Phosphorus Recovery From Domestic Wastewater by Combining BNR With Induced Crystallization

“…5), obviously completed by DPAO performing denitrifying nitrogen and phosphorus removal simultaneously, which is agreement with the appearance in various EBPR systems (Fang et al 2012;Marcelino et al 2009;Slater et al 2010), indicating that a good P uptake performance was also existent in the BNR-IC system. This result further demonstrated that combing BNR with IC proposed in this study was feasible for nutrients removal and P recovery simultaneously from domestic wastewater.…”

Unraveling the Long-Term Effects of Cr(VI) on the Performance and Microbial Community of Nitrifying Activated Sludge System

“…Cheng et al [10] found that NH 4 + -N removal decreased from 97% to 68% with the addition of Cr(VI) with 5 mg L −1 in an SBR. Fang et al [11] tested the acute tolerance of an enhanced biological phosphorus removal (EBPR) system on a high of concentration Cr(VI) and revealed that P removal performance was completely inhibited by Cr(VI) with a concentration higher than 5 mg L −1 , but the EBPR system could recover after a short Cr(VI) shock. Subsequently, Fang et al [2] studied the long-term effects (52-d systematic investigation) of a low concentration of Cr(VI) (0.3-0.8 mg L −1 ) on the P removal performance of a granule-based EBPR system, and found that a high Cr(VI) concentration (0.5 mg L −1 ) could significantly inhibit P removal; filamentous bacteria overgrew, and eventually sludge bulking occurred in long-term Cr (VI) loading.…”

Long-term effect of Cu (II) on the phosphorous removal performance in enhanced biological phosphorous removal systems

“…FISH techniques were used to determine the PAOs and GAOs populations involved in EBPR processes according to the procedure described by Fang et al [6]. The detail information about the probes, assigned as EUBMIX for the entire bacteria, PAOMIX for PAOs, and GAOMIX for GAOs, were described by Zheng et al [23], according to Daims et al [24], Crocetti et al [25], Crocetti et al [26] and Kong et al [27].…”

“…It has been reported that different metabolic process of microorganisms in EBPR is related to different enzyme catalytic system; the exopolyphosphatase (PPX) and polyphosphate kinase (PPK) are identified to be important enzymes related to the process of P removal in EBPR [3]. For visualization of the specific microbe and characterization of microbial population involved in the P removal processes, the technology of fluorescent in situ hybridization (FISH) has been extensively used [5][6][7][8].…”

“…However, poor performance or complete failure of P removal has been reported due to the presence of heavy metals [6,[9][10][11][12]. The heavy metals are toxic to most microorganisms and influence microbial biomass growth when their concentrations are surpassed to certain degree [13].…”