The Realization of Nitrification and Denitrification Processes in Low C/N Sewage
The influences of HRT, C/N ratio on simultaneous nitrification and denitrification (SND) and the rule of pH in a sequencing batch reactor (SBR) were investigated while treating low C/N synthetic municipal wastewater. The results showed that the function of SND became more outstanding and the removal rate of TN, NH4+-N was improved greatly by lengthening HRT appropriately; when the C/N increased, the denitrification effect of the simultaneous nitrification and denitrification would be improved; .At the same time, the variation of pH value was well related to ammonia oxidation. So that judgment on the ending of nitrification and denitrification could be based on the inflection point on the varied curve of pH, and thus reducing aeration and mixing time for the purpose of energy saving.
Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He
G. S. Qiu et al., "The Realization of Nitrification and Denitrification Processes in Low C/N Sewage", Advanced Materials Research, Vols. 233-235, pp. 600-603, 2011