以批次（進水－排放）的活性污泥處理單元程序，評估傳統連續曝氣方式
（NLAP）和間歇曝氣方式（IAP ），在處理負荷為0.5∼1.0Kg BOD/立方
公尺/天及TN/BOD比為0.13、0.18、0.27和 0.53之廢水條件下，其對於養
豬廢水中氮、磷之去除效果做一比較。除了曝氣方式不同外，其他之操作
條件在每個單元都相同；在NLAP中曝氣21小時；在IAP 中，每隔60分鐘
、90分鐘及 120分鐘交替曝氣。結果顯示，不論IAP 或NLAP其BOD 和SS之
去除率分別均可高達80.0∼99.4％和80.9∼99.1％。然而氮和磷的去除則
有明顯的差異，在進流水之TN/BOD比為0.13的條件下，IAP-60及NLAP對氮
的去除率分別為92.7％和89.2％；對磷之去除率則為29.8％和24.8％。氮
和磷的去除率會隨著廢水中TN/BOD比值的增加而降低，當TN/BOD比高
達0.53時，IAP-60的氮去除率降為34.5％；而磷之去除率則降為 1.0％。
比較在不同操作條件下之結果發現以I1/2（曝氣 1小時，不曝氣 2小時）
之去氮、磷效果最佳，其與NLAP對照組比較，I1/2之總氮去除率為
82.2％∼86.3％，總磷去除率為23.0％∼52.8％；而NLAP之總氮去除率只
有55.4％∼63.7％，總磷去除率為-37.1％∼-12.2％。I1/2之去氮、磷效
果較NLAP高出很多，而且又可減少66.7％之曝氣量。在不用補充任何碳源
和調整pH之情形下， IAP系統可以有效去除養豬廢水中之氮、磷及節省運
轉費用，此種活性污泥單元是相當值得推廣的處理方法。

The removal efficiencies for nitrogen and phosphorus from
swine wastewater were studied at TN/BOD ratio 0.13, 0.18,
0.27 ,0.53 by fill-and-draw type activeated sludge units
with an intermittent aeration process(IAP),in comparsion with
a typical non-limited aeration process(NLAP) under 0.5 ∼
1.0kg BOD/ cubic meter / day loading. In both processes,
operational conditions for the units were same except for the
aeration program. In NLAP , consecutive aeration for 21 hour
was used , while in the IAP, intermittent aeration which
alternated aeration and non-aeration periods were at intervals
of 1 hour, 1.5hour or 2 hour was used. High removal
efficiencies ( 80.0 ∼ 99.4% and 80.9 ∼ 99.1%) for BOD and SS
were attained with both these processes. While, there were
great differences in the removal ofnitrogen and phosphorus
between IAP and NLAP; the removal efficiences for nitrogen in
IAP-60 and NLAP were 92.7% and 89.2%, and for phos- phorus
were 29.8% and 24.8%,respectively. However, those removal
efficiencies decreased with the increase in the TN/BOD ratio
of influent. The removal efficiences for nitrogen in IAP-60
was 34.5%, and for phosphorus was 1.0% at influent TN/BOD of
0.53. After consecutive working at various operation condition,
the results showed that the removal efficiences for both
nitrogen and phosphorus in I1/2 ( aeration and non-aeration
periods were 1hr and 2hr, respectively) was higher. Total
removal efficiences for nitrogen in I1/2 and NLAP were
82.2%∼86.3% and 55.4%∼63.7% , and for phosphorus were 23.0%
∼ 52.8% and -37.1% ∼ -12.2%, respectively. It was not only
that the removal efficiences for nitrogen and phosphorus in
I1/2 were much higher than those in NLAP , but also it could
save the 66.7 % amount of aeration . Operating IAP system
could remove the nitrogen and phosphorus from swine
wastewater validly without any supplemented carbon sources
and pH stabilizers .As a result, the operation cost can be
reduced.