Enrichment and characterization of acid-tolerant nitrifying sludge
Wang, L; Zheng, P; Abbas, G; Xing, Y; Li, W; Wang, R; Deng, L; Lei, Y; Zheng, D; Zhang, Y
| HERO ID | 3463432 |
|---|---|
| In Press | No |
| Year | 2016 |
| Title | Enrichment and characterization of acid-tolerant nitrifying sludge |
| Authors | Wang, L; Zheng, P; Abbas, G; Xing, Y; Li, W; Wang, R; Deng, L; Lei, Y; Zheng, D; Zhang, Y |
| Journal | Journal of Environmental Management |
| Volume | 184 |
| Issue | Pt 2 |
| Page Numbers | 196-203 |
| Abstract | Nitrification is an acidifying process that requires the addition of external alkalinity because of the alkaliphilic nature of the most ammonia-oxidizing bacteria. In this study, aerobic activated sludge was used as inoculum in an internal loop air-lift reactor, which resulted in successful enrichment of acid-tolerant nitrifying (ACIN) sludge at pH 6.0 by sequential addition of tea orchard soil suspension. The results showed that ACIN sludge had a remarkable acid tolerant capability with a volumetric ammonia conversion rate of 1.13 kg N m(-3) day(-1). ACIN sludge showed a higher maximum specific ammonia conversion rate (0.29 g N g(-1) VSS day(-1)) than neutrophilic nitrifying sludge (0.14 g N g(-1) VSS day(-1)) at pH 6.0 and had good resistance against pH fluctuations, with a maximum specific ammonia conversion rate (0.584 g N g(-1) VSS day(-1)) at pH 7.5. Microbial community analysis indicated that the higher abundance of acid tolerant Nitrosospira and ammonia-oxidizing archaea laid a solid foundation for the remarkable acid-tolerant capability of ACIN sludge. |
| Doi | 10.1016/j.jenvman.2016.09.069 |
| Pmid | 27712918 |
| Wosid | WOS:000388778400006 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |