TY - JOUR
T1 - Automatic control strategy for biological nitrogen removal of low C/N wastewater in a sequencing batch reactor
AU - Kishida, N.
AU - Kim, J. H.
AU - Chen, M.
AU - Tsuneda, S.
AU - Sasaki, Hi
AU - Sudo, R.
PY - 2004
Y1 - 2004
N2 - To establish an automatic control system of external carbon addition in biological nitrogen removal, a bench-scale sequencing batch reactor with real-time control strategy was designed in this study. An oxidation-reduction potential (ORP) profile was used for automatic control of external carbon addition. The mean removal efficiency of total organic carbon was over 98%. Complete denitrification in an anoxic phase and complete denitrification and nitrification in anoxic and oxic phases were accomplished, respectively, because the oxic and anoxic periods were also appropriately controlled with ORP and pH profiles, respectively. Mean removal efficiency of total nitrogen was over 95%. When concentration of influent wastewater was changed, volume of additional carbon was automatically changed with the influent fluctuation, and flexible hydraulic retention time was achieved in this system.
AB - To establish an automatic control system of external carbon addition in biological nitrogen removal, a bench-scale sequencing batch reactor with real-time control strategy was designed in this study. An oxidation-reduction potential (ORP) profile was used for automatic control of external carbon addition. The mean removal efficiency of total organic carbon was over 98%. Complete denitrification in an anoxic phase and complete denitrification and nitrification in anoxic and oxic phases were accomplished, respectively, because the oxic and anoxic periods were also appropriately controlled with ORP and pH profiles, respectively. Mean removal efficiency of total nitrogen was over 95%. When concentration of influent wastewater was changed, volume of additional carbon was automatically changed with the influent fluctuation, and flexible hydraulic retention time was achieved in this system.
KW - C/N ratio
KW - External carbon source
KW - Oxidation-reduction potential(ORP)
KW - Real-time control
KW - pH
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U2 - 10.2166/wst.2004.0605
DO - 10.2166/wst.2004.0605
M3 - Article
C2 - 15656294
AN - SCOPUS:11044234627
SN - 0273-1223
VL - 50
SP - 45
EP - 50
JO - Water Science and Technology
JF - Water Science and Technology
IS - 10
ER -