Biochemical Engineering Journal
Biochemical Engineering Journal
5 years ago

Oxygen transfer dynamics and nitrification in a novel rotational sponge reactor

Oxygen transfer dynamics and nitrification in a novel rotational sponge reactor
The nitrification process demands higher oxygen supply, which is fulfilled through external aeration in wastewater treatment. To perform nitrification without external aeration, this study developed a novel rotating sponge (RS) reactor and estimated its oxygen transfer capability. The reactor obtained an oxygen transfer coefficient (KLa) value of over 100d−1 at 40 rounds per hour (rph), which is one-eighth of the rotational speed of conventional rotational biological contactors. Within 53days of operation, reactor achieved 97% nitrification efficiency with an effluent NH4 +-N concentration of 1mgL−1. On the other hand, the volumetric oxygen transfer rate in the reactor was 245mg-O2L−1d−1 at 10rph during the experimental period. However, the average volumetric oxygen consumption rate during nitrification was 187mg-O2L−1d−1, which was below the oxygen transfer rate. Microbial community analysis revealed high relative abundance of bacteria such as Nitrosomonas, Nitrospira, and Nitrobacter in the RS reactor, which contributed to nitrification.

Publisher URL: www.sciencedirect.com/science

DOI: S1369703X17302528

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.