Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Nitrogen transformation in slightly polluted surface water by a novel biofilm reactor: Long-term performance and microbial population characteristicsopen access

Authors
Xia, YinfengZhu, LifangGeng, NanLu, DebaoXu, CundongWithana, Piumi AmashaVithanage, MeththikaKhan, EakalakOk, Yong Sik
Issue Date
10-7월-2022
Publisher
ELSEVIER
Keywords
Biofilm reactor; Denitrification; Eutrophication; Nitrification; Surface water
Citation
SCIENCE OF THE TOTAL ENVIRONMENT, v.829
Indexed
SCIE
SCOPUS
Journal Title
SCIENCE OF THE TOTAL ENVIRONMENT
Volume
829
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/142898
DOI
10.1016/j.scitotenv.2022.154623
ISSN
0048-9697
Abstract
This study proposes a modular floating biofilm reactor (MFBR) for in situ nitrogen removal from slightly polluted water in rivers using enriched indigenous microorganisms. Its main structure is a 60 cm x 60 cm x 90 cm rectangular reactor filled with hackettens. After a 96-day startup, the removal efficiencies of ammonia-N and total N (TN) reached 80% and 25%, respectively, with a hydraulic retention time (HRT) of 10 h, whereas those in a control reactor (without biofilm) were only 4.9% and 0.2%, respectively. The influences of HRT and dissolved oxygen (DO) were also investigated. As a key factor, HRT significantly affected the removal efficiencies of ammonia-N and TN. When HRT was close to the actual value for a river studied (2.4 min), the removal efficiencies of ammonia-N and TN were only 8.7% and 3.1%, respectively. Aeration increased the concentration of DO in water, which enhanced nitrification but inhibited denitrification. When HRT was 2.4 min, aeration intensity was 20 L/min; the ammonia-N and TN removal rates were 9.5 g/(m2 center dot d) and 11.3 g/(m2 center dot d), respectively. The results of microbial community analysis indicated that the microorganisms forming the biofilm were indigenous bacteria. The findings demonstrated a concept-proof of MFBR, which may be evaluated in scaling up investigation for developing a new methodology for nitrogen removal from slightly polluted surface water in plain river networks.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Altmetrics

Total Views & Downloads

BROWSE