Novel single-stage autotrophic nitrogen removal via co-immobilizing partial nitrifying and anammox biomass
| Autor: | Tian Tian, Jiti Zhou, Sen Qiao, Yingjun Cheng, Xiumei Duan |
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| Rok vydání: | 2013 |
| Předmět: |
Single stage
General Chemical Engineering Microorganism Environmental engineering Biomass chemistry.chemical_element General Chemistry Nitrogen removal Nitrogen Industrial and Manufacturing Engineering Ammonia chemistry.chemical_compound chemistry Anammox Environmental chemistry Environmental Chemistry Autotroph |
| Zdroj: | Chemical Engineering Journal. 230:19-26 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2013.06.048 |
| Popis: | In this study, we developed an effective strategy to achieve single-stage autotrophic nitrogen removal by co-immobilizing partial nitrifying and anaerobic ammonia oxidation (anammox) biomass. Batch experiments were carried out to determine the optimum dissolved oxygen concentration of 1.5 mg/L, and the optimum biomass ratio of partial nitrifying biomass versus anammox biomass of 1:2. In continuous experiment, the total nitrogen removal rate reached 1.69 g N/L/d (nitrogen loading rate up to 2.2 g N/L/d). At the stable running stage, the TN average removal efficiency reached 77%. Scanning electron microscopy observations showed microorganisms greatly increased after 80 days cultivating. FISH analysis indicated that most anammox cells agglomerated in groups and ammonia oxidizing bacteria formed a thick layer around anammox cells. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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