| Summary: | 碩士 === 淡江大學 === 水資源及環境工程所 === 83 === This study established a pilot plant of anaerobic-anoxic-
aerobic activated sludge process,and the whole biological
reactor is mainly consisted of anaerobic tank,anoxic tanks and
aerobic tanks that total volume is 940.8L,also connected with
primary clarifier and secondary clarifier. The experimental
influent was typical municipal wastewater with the flow of
62.5L/h and 130% nitrified recycle,50% return sludge to probe
the efficiencies and characteristics of simultaneous carbon,
nitrogen and phosphorus removal,the optimum operation condition
and experience. According to the experimental results and
discussion,the influenced characteristics of nitrification,
denitrification,phosphorus release and uptake for biological
nitrogen and phosphorus removal efficiencies shows the
conclusions as fllow: 1)BOD was treated below 3mg/L with
average removal efficiency of 98% achieved,TN 10mg/L with
removal efficiencies in 60-80% and TP 1mg/L with removal
efficiencies in 70-90%. 2)At water temperature of 20-27℃,the
higher temperature obtained the increasing trend of
nitrification rate constant(Kn), denitrification rate constant(
Kdn),phosphorus release rate constant(Kpr) and phosphorus
uptake rate constant(Kpu). These constants and temperature(T)
can be expressed by flowing formula respectively: Kn(mgN/gMLSS/
h)=0.064exp(0.108T);Kdn(mgN/gMLSS/h) =0.001exp(0.257T);Kpr(mgP/
gMLSS/h)=0.011exp(0.111T);Kpu (LP/gMLSS/h)=0.016exp(0.121T).
3)The phosphorus content of waste sludge had to exceed 3-4% for
better phosphorus removal effect. 4)For combined nitrogen and
phosphorus removal,F/M ratio and SRT should be controlled
between 0.06-0.12kgBOD/kgMLSS/d and 12-20 days, TP and TN
removal efficiencies were above 70% and 60% respectively can be
obtained.
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