AI Article Synopsis
- The study assessed the effects of phenol on Anammox activity, determining a short-term IC50 value of 678.2 mg L(-1) through batch testing.
- In long-term experiments, two identical reactors were evaluated: one with synthetic wastewater (R0) and one with varying phenol concentrations (R1), showing that R0 maintained stable nitrogen removal rates.
- R1 experienced significant suppression of Anammox activity at 50 mg L(-1) phenol, affecting biomass and stoichiometric ratios but could recover with specific control strategies.
Article Abstract
The short- and long-term effects of phenol on anaerobic ammonium oxidation (Anammox) were evaluated. The short-term impact of phenol on Anammox activity was determined by a batch test, and an IC50 value of 678.2 mg L(-1) was calculated. Anammox granular sludge was equally seeded into two identical upflow anaerobic sludge blanket reactors (R0 and R1); synthetic wastewater without phenol was fed to R0 while with varied phenol was fed to R1 to study the long-term effects. The performance of R0 was stable, with a steadily rising nitrogen removal rate of 10.5-21.3 kg N m(-3)d ay(-1). However, the performance of R1 was significantly suppressed by an influent phenol concentration of 50 mg L(-1), and was recovered and stabilized by applying one or more control strategies. The phenol-mediated inhibition depressed the Anammox activity and biomass, and caused a change of stoichiometric ratios and granule characteristics.
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| http://dx.doi.org/10.1016/j.biortech.2013.03.145 | DOI Listing |
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