Open AccessExperimental study on shortcut simultaneous nitrogen removal in treating domestic sewage
Author(s) -
Ping Zheng,
Yan Xiao,
Jun Yang,
Fei Hong
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2009/1/012058
Subject(s) - nitrogen , hydraulic retention time , chemistry , sewage , nitrification , nitrite , ammonia , denitrification , pulp and paper industry , environmental chemistry , oxygen , carbon fibers , environmental engineering , sewage treatment , environmental science , nitrate , materials science , biochemistry , organic chemistry , composite number , composite material , engineering
To treat domestic sewage with high efficacy and low cost, the technology of shortcut simultaneous nitrogen removal was used with a new biofilm reactor. The influences on nitrogen removal effect by start-up procedure, nitrogen transformation characteristics and main factors (hydraulic retention time, dissolved oxygen, carbon-nitrogen ratio) were analyzed. The results indicate that: The reactor finished start-up of shortcut simultaneous nitrogen removal in 14 days of cultivation time after the biofilm cultured in the carrier. The ammonia nitrogen removal rate, simultaneous nitrification-denitrification rate and cumulative nitrite nitrogen rate respectively reached 91.3%, 82.7% and 63.4% in the last phase of start-up procedure. To remove ammonia nitrogen with the technology of shortcut simultaneous nitrogen removal efficiently and steadily, hydraulic retention time, dissolved oxygen, carbon-nitrogen ratio should be controlled in 3.56 hours, 1.5 mg/L and 5~8.