Performance of internal-loop air-lift nitrifying bioreactor.
- Author:
Feng-Mei LIN
1
;
Ping ZHENG
;
Yang-Yang ZHAO
;
Bao-Lan HU
;
Jian-Song CHEN
Author Information
1. Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China.
- Publication Type:Journal Article
- MeSH:
Ammonia;
metabolism;
Anaerobiosis;
Bioreactors;
Nitrites;
metabolism;
Nitrogen;
metabolism;
Oxidation-Reduction;
Sewage;
analysis
- From:
Chinese Journal of Biotechnology
2002;18(4):492-496
- CountryChina
- Language:Chinese
-
Abstract:
The performance of internal-loop air-lift nitrifying bioreactor was good with strong tolerance to influent ammonia concentration (78.49 mmol/L), high volume converting rate (163.18 mmol/L.d) and obvious working stability (ammonia removal > 94.42%). During operation of internal-loop air-lift bioreactor, the nitrifying activated sludge was granulated. The nitrifying granular activated sludge began to appear on day 45. Its average diameter was 0.83 mm, settling velocity was 55.53 m/h and specific ammonia removal rate was 0.95 mmol (NH4(+)-N)/g (VS).d. The nitrifying granular activated sludge had the activity for anaerobic ammonia oxidation with ammonia oxidation rate of 0.23 mmol (NH4(+)-N)/g(VS).d and nitrite reduction rate of 0.24 mmol (NO2(-)-N)/g(VS).d.
