fulltext.study @t Gmail

Partial nitrification in a continuous pre-denitrification submerged membrane bioreactor and its nitrifying bacterial activity and community dynamics

Paper ID Volume ID Publish Year Pages File Format Full-Text
3754 186 2011 7 PDF Available
Title
Partial nitrification in a continuous pre-denitrification submerged membrane bioreactor and its nitrifying bacterial activity and community dynamics
Abstract

In this study, nitrogen removal by partial nitrification via nitrite was completely achieved for >40 days in a continuous submerged membrane bioreactor configured with both a pre-denitrification (10 L) and a nitrification tank (20 L). The possible aeration saving achieved with this configuration was 29% compared to that required for nitrogen removal via nitrate. Partial nitrification in the submerged membrane bioreactor was achieved by controlling the influent ammonium concentration (161 mg N/L) and the dissolved oxygen concentration in the nitrification tank (0.6 mg/L). Measurement of oxygen uptake rates during batch experiments confirmed that increasing influent ammonium concentration (161 mg N/L) decreased nitrite oxidizing activity of the biomass to almost zero. Furthermore, real-time PCR assays revealed that increasing influent ammonium concentration led to a decrease not of Nitrobacter but Nitrospira in the submerged membrane bioreactor. These results suggest that partial nitrification can be achieved by inhibiting the activity and growth of Nitrospira spp. with high ammonium concentration.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Nitrogen removal via NO2− was achieved in a continuous pre-denitrification SMBR. ► The aeration saving was 29% compared to that required for N removal via NO3. ► N removal via NO2− can be achieved by inhibiting Nitrospira spp.

Keywords
Activated sludge; Membrane bioreactor (MBR); Nitrifying bacteria; Nitrogen removal; Oxygen uptake rate (OUR); Wastewater treatment
First Page Preview
Partial nitrification in a continuous pre-denitrification submerged membrane bioreactor and its nitrifying bacterial activity and community dynamics
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 55, Issue 2, 15 July 2011, Pages 101–107
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us