Process Biochemistry
Process Biochemistry
5 years ago

Treatment of High-strength Ammonia Nitrogen Wastewater by Polyvinyl Alcohol–Sodium Alginate Immobilization of Activated Sludge

Treatment of High-strength Ammonia Nitrogen Wastewater by Polyvinyl Alcohol–Sodium Alginate Immobilization of Activated Sludge
Microorganism embedded immobilization technology was employed to treat high-strength ammonia nitrogen wastewater. Experiments were conducted in batch reactors with different initial ammonia concentrations (50–400mg/L), 10% particle dosage rates, 7.5–8.5pH, and 8h operation period; stable ammonium removal efficiency was reached in the 28th, 40th, 55th, 58th, and 58th periods. The average ammonia removal rate were 100%, 100%, 80.94%, 64.62%, and 48.03%, respectively, and results were consistent with zero-order reaction kinetics. Immobilized particles were visualized using Brunauer-Emmett-Teller (technique of characterizing solids, BET) and Scanning Electron Microscopy (SEM). The specific surface area and pore size of stabilized particles were larger than those of fresh immobilized particles, and microbial attachments were found in the interior and surface of particles. High-throughput sequencing showed that the microbial community composition significantly differed between the interior and surface of embedded particles. The existence of heterotrophic nitrifying and aerobic denitrifying bacteria enhanced biological denitrification in reactors.

Publisher URL: www.sciencedirect.com/science

DOI: S135951131730898X

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.