The effects of antecedent dry days on the nitrogen removal in layered soil infiltration systems for storm run‐off control
SCIE
SCOPUS
- Title
- The effects of antecedent dry days on the nitrogen removal in layered soil infiltration systems for storm run‐off control
- Authors
- CHO, KANGWOO; Min-Hyuk Yoon; Kyung-Guen Song; Kyu-Hong Ahn
- Date Issued
- 2011
- Publisher
- TAYLOR & FRANCIS LTD
- Abstract
- A modified ludzack ettinger reactor (MLE) combined with a post-denitrification reactor (PDMLE) using electroflotation (EF) as a secondary clarifier was investigated on its feasibility and process performance. Results indicated that higher mixed liquor suspended solids (MLSS) concentrations in bioreactor (5,350 +/- A 352 mg L-1) were maintained via the highly concentrated return sludge (16,771 +/- A 991 mg L-1) from the EF clarifier and the effluent suspended solids (SS) concentrations continued relatively low, representing effluent SS concentration of 1.71 +/- A 1.16 mg L-1, compared with GS-A2O process during the operation of four months. The denitrification was improved by combining MLE process with post-denitrification based on endogenous decay (i.e. no additional carbon source was added), resulting in the removal efficiencies of TN were about 91 and 59% for the influent C/N ratio of 10 and 5, respectively, revealing relatively high nitrogen removal as compared with EF-A2O and gravity settling (GS)-A2O processes as a control. The nitrogen balance analysis indicates that pre-denitrification and post-denitrification contributed to 78 and 22% of TN removed, respectively.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/40868
- DOI
- 10.1080/09593330.2010.511278
- ISSN
- 0959-3330
- Article Type
- Article
- Citation
- ENVIRONMENTAL TECHNOLOGY, vol. 32, no. 7, page. 747 - 755, 2011
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