Effect of the seawater salinity on the nitrification-denitrification via nitrite pathway
Received date: 2002-09-10
Online published: 2010-10-01
Effects of seawater salinity on the nitrification denitrification via nitrite pathway are studied by SBR process. Several parameters of temperature,pH and NH4+-N load are also studied to evaluate their effects on nitrogen removal efficiency under different salinity. The experimental results indicate that nitrification denitrification via nitrite pathway can be accomplished still in the salinity range of domestic sewage(the proportion of seawater in sewage is not large than 35%),but the nitrogen removal efficiency has relations with the NH4+-N load having different salinity. To maintain the nitrification via nitrite and a relatively high ammonia nitrogen removal efficiency, the NH4+-N load should be reduced with the increasing of the proportion of seawater in domestic sewage. The nitrogen removal efficiency reaches over 90% when the NH4+-N load is lower than reaction temperature should be kept at 25 ℃ to 30 ℃.
Yu Deshuang, Peng Yongzhen, Zhang Xiangzhong, Song Xueqi . Effect of the seawater salinity on the nitrification-denitrification via nitrite pathway[J]. Industrial Water Treatment, 2003 , 23(1) : 50 -54 . DOI: 10.11894/1005-829x.2003.23(1).50
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