Anaerobic ammonium oxidation process in an upflow anaerobic sludge blanket reactor with granular sludge selected from an anaerobic digestor |
| |
Authors: | Hung-Thuan?Tran Young-Joo?Park Mi-Kyeoung?Cho Dong-Jin?Kim Email author" target="_blank">Dae-Hee?AhnEmail author |
| |
Institution: | (1) Wastewater Technology Division, National Environmental Engineering Research Institute, Council of Scientific and Industrial Research, Nagpur, 440 020, India |
| |
Abstract: | The purpose of this work was to evaluate the development of the anammox process by the use of granular sludge selected from
a digestion reactor as a potential seed source in a lab-scale UASB (upflow anaerobic sludge blanket) reactor system. The reactor
was operated for approximately 11 months and was fed by synthetic wastewater. After 200 days of feeding with NH4
+ and NO2
− as the main substrates, the biomass showed steady signs of ammonium consumption, resulting in over 60% of ammonium nitrogen
removal. This report aims to present the results and to more closely examine what occurs after the onset of anammox activity,
while the previous work described the start-up experiment and the presence of anammox bacteria in the enriched community using
the fluorescencein situ hybridization (FISH) technique. By the last month of operation, the consumed NO2
−N/NH4
+-N ratio in the UASB reactor was close to 1.32, the stoichiometric ratio of the anammox reaction. The obtained results from
the influentshutdown test suggested that nitrite concentration would be one key parameter that promotes the anammox reaction
during the start-up enrichment of anammox bacteria from granular sludge. During the study period, the sludge color gradually
changed from black to red-brownish. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|