SUBSTRATE-INHIBITION AND MULTIPLE STATES IN A CONTINUOUS NITRIFICATION PROCESS

被引:44
作者
SHEINTUCH, M [1 ]
TARTAKOVSKY, B [1 ]
NARKIS, N [1 ]
REBHUN, M [1 ]
机构
[1] TECHNION ISRAEL INST TECHNOL, DEPT CIVIL ENGN, IL-32000 HAIFA, ISRAEL
关键词
NITRIFICATION; ACTIVATED-SLUDGE; STEADY-STATE MULTIPLICITY;
D O I
10.1016/0043-1354(94)00216-T
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Multiple steady states were observed in a continuous nitrification process in a laboratory activated sludge reactor operating at 18 degrees C and subject;to high ammonium concentration in feed (up to 300 mg/l as N): under the same operating conditions a state of either complete oxidation to nitrate or of partial oxidation to nitrite may be attained, depending on the initial conditions. A model incorporating Monod and Andrews kinetics for growth of the two species was developed and employed for parameter estimation. A steady-state solution, expressed in terms of the measured variables-total biomass concentration in the reactor and in the effluent-was derived and its parameters were estimated. The model was then analyzed to show domains of steady state multiplicity under two control strategies in which either the sludge age or the total biomass concentration is kept constant.
引用
收藏
页码:953 / 963
页数:11
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