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- Title
Influence of Operational Parameters and Low Nickel Concentrations on Partial Nitrification in a Submerged Biofilter.
- Authors
Aslan, Sukru; Gurbuz, Burhanettin
- Abstract
The effect of Ni concentrations on ammonium oxidation was studied in a batch and partial bionitrification reactor (PBNR). The nitrification rates up to the concentration of 0.1 mg Ni/l were close to those without Ni. After testing the operational conditions in the PNBR, the highest NO-N/NO-N ratio was achieved at the DO concentrations of 2.0 mg/l and pH 9.00. The PNBR was operated at steady state (NH-N loading rate and NO-N/NO-N ratio were 405 g m day and 0.74, respectively) before exposure to Ni. The removal efficiency of NH-N and NO-N/NO-N ratio in the effluent waters was increased by adding low concentrations of heavy metals to the PBNR. The average number of aerobic mesophilic bacteria at the biofilm surface and in the water in the void volume of PNBR were 1.0 × 10 CFU/g and 1.4 × 10 CFU/ml, respectively.
- Subjects
NITRIFICATION; OXIDATION; BIOCHEMISTRY; BACTERIA; BIOFILMS
- Publication
Applied Biochemistry & Biotechnology, 2011, Vol 165, Issue 7/8, p1543
- ISSN
0273-2289
- Publication type
Academic Journal
- DOI
10.1007/s12010-011-9374-0