Health & Environmental Research Online (HERO)


Print Feedback Export to File
1510900 
Journal Article 
[Characteristic research of shortcut denitrification in synthetic ammonia industrial wastewater treatment process] 
Li, Y; Li, ZB; Ma, JX; Wang, XY; Zhao, BH; Li, J 
2012 
Yes 
Huanjing Kexue / Chinese Journal of Environmental Science
ISSN: 0250-3301 
33 
6 
1902-1906 
Chinese 
22946173 
Active sludge was from a pilot-scale synthetic ammonia industrial wastewater treatment plant with a strengthen anoxic-oxic (A/O) technology. The zero order kinetic model was suit for describing shortcut and complete denitrification process. Experimental results showed that shortcut denitrification could reduce 14.1% carbon source consumption and 55.7% denitrification time, respectively, comparing with complete denitrification. The maximum specific denitrification rate was 0.509 g x (g x d)(-1) with an initial NO2(-) -N concentration of 36.82 mg x L(-1) and pH 7.5. In the industrial practice, it must be avoided pH higher than 9.0 in anoxic zone for industrial treatment. Replication-selective denitrifying bacteria showed a strong adaptability to methanol and ethanol, but showed maladaptation to other small molecular and easily biodegradable organics, such as glucose and acetic acid.