Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
682813 | Bioresource Technology | 2010 | 6 Pages |
Abstract
Partial nitrification (PN) process is an essential pre-treatment to Anammox process for nitrogen removal from ammonium-rich wastewaters. High activity nitrifiers (HANs) are considered as the key to high-rate PN process. The HANs could be successfully enriched at free ammonia (FA) concentrations of 10-20 mg NH3-N Lâ1, which differed significantly from those enriched at FA concentrations of 1-3 mg NH3-N Lâ1. The maximum specific ammonium conversion rate, half saturation constant, half inhibition constant, cell yield and decay rate were 2.87 g N gâ1 VSS dâ1, 5.82 mg N Lâ1, 8218.8 mg N Lâ1, 0.15 g VSS gâ1NH4+-N and 0.09 dâ1 for HANs at 30 °C, respectively, which endowed the PN process a volumetric conversion rate (VCR) as high as 2.22 ± 0.33 kg N mâ3 dâ1. The cultivation mode of HANs was workable and the HANs were promising as inoculum for the PN process.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Jianwei Chen, Ping Zheng, Yi Yu, Qaisar Mahmood, Chongjian Tang,