Issue 2, 2019

Application of a synthetic zeolite as a storage medium in SBRs to achieve the stable partial nitrification of ammonium

Abstract

Free ammonia (FA) is the growth substrate for ammonia-oxidizing bacteria (AOB), but a high concentration of FA could also inhibit AOB activities. Since ammonium can be adsorbed by zeolite and desorbed by microorganisms, a unique attempt to use zeolite synthesized from coal fly ash (ZCFA) as a storage medium for supplying ammonium concentrations in SBRs was conducted, leading to an appropriate FA range. After confirming the excellent adsorbent properties, the SBR was set up with an added amount of 10 g L−1 synthetic zeolite (ZSBR). According to the Haldane model, the inhibition concentrations of the effluent FA in the ZSBR and the blank SBR were calculated as 58.52 mg L−1 and 25.66 mg L−1, respectively, suggesting that the ZSBR can adapt to higher FA concentrations. Inhibition of nitrite-oxidizing bacteria and the dominance of AOB can lead to an excellent nitrite accumulation rate (up to 96%) in the ZSBR. High-throughput sequencing analysis further presented the enrichment of AOB in the ZSBR, which accounted for 49.58% of the operational taxonomic units at the family level. These results showed that the application of ZCFA for realizing the stable partial nitrification of ammonium in the ZSBR was successfully achieved.

Graphical abstract: Application of a synthetic zeolite as a storage medium in SBRs to achieve the stable partial nitrification of ammonium

Supplementary files

Article information

Article type
Paper
Submitted
13 Sep 2018
Accepted
02 Dec 2018
First published
06 Dec 2018

Environ. Sci.: Water Res. Technol., 2019,5, 287-295

Application of a synthetic zeolite as a storage medium in SBRs to achieve the stable partial nitrification of ammonium

J. Chen, X. Wang, Z. Chen, X. Feng and X. Chen, Environ. Sci.: Water Res. Technol., 2019, 5, 287 DOI: 10.1039/C8EW00641E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements