Indexed by:期刊论文
Date of Publication:2008-07-01
Journal:JOURNAL OF ENVIRONMENTAL SCIENCES
Included Journals:SCIE、PubMed、ISTIC、CSCD
Volume:20
Issue:8
Page Number:933-939
ISSN No.:1001-0742
Key Words:simultaneous nitrification and denitrification (SND); chemical oxygen demand and nitrogen (COD/N) ratio; dissolved oxygen (DO) concentration
Abstract:The effects of chemical oxygen demand and nitrogen (COD/N) ratio and dissolved oxygen concentration (DO) on simultaneous nitrification and denitrification (SND) were investigated using an airlift internal circulation membrane bioreactor (AIC-MBR) with synthetic wastewater. The results showed that the COD efficiencies were consistently greater than 90% regardless of changes in the COD/N ratio. At the COD/N ratio of 4.77 and 10.04, the system nitrogen removal efficiency became higher than 70%. However, the nitrogen removal efficiency decreased to less than 50%, as the COD/N ratio shifted to 15.11. When the operating DO concentration was maintained at 1.0 mg/L in AIC-MBR, a satisfying SND was achieved. Either low or high DO concentration could restrain SND.
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Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Alma Mater:大连工学院
Degree:Master's Degree
School/Department:环境学院
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