Enhanced nitrogen removal using C/N load adjustment and real-time control strategy in sequencing batch reactors for swine wastewater treatment.
The laboratory-scale sequencing batch reactor (SBR) was used to study the effectiveness of an integrated strategy of real time control with C/N ratio adjustment for practical swine wastewater treatment. Swine waste was used as the external carbon source for continuous treatment in the SBR reactors. Oxidation-reduction potential and pH were used as parameters to control the continuous denitrification and nitrification process, respectively. A constant effluent quality could be obtained, despite drastic variations in the characteristics of influent wastewater. Also, a relatively complete removal of nutrients was always ensured, since the optimum quantity of the external carbon source could be provided for complete denitrification, and a flexible hydraulic retention time was achieved by the successful real-time control strategy. The average removal efficiencies of total organic carbon and nitrogen were over 94% and 95%, respectively.
Chen
M
M
Center for Environmental Science in Saitama, Kamitanadare 914, Kisai-machi, Saitama, 347-0115, Japan. m-chen@kankyou.pref.saitama.jp
Kim
J H
JH
Kishida
N
N
Nishimura
O
O
Sudo
R
R
D000818:Animals; D001331:Automation; D019149:Bioreactors; D002244:Carbon / Q000032:analysis*; D008372:Manure; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism*; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements; D014873:Water Pollutants / Q000302:isolation & purification*
D008372:Manure; D014873:Water Pollutants; D002244:Carbon; D009584:Nitrogen