• 作者： 謝越平; 車明道; 劉黔蘭
• 作者服務機構： 國立中興大學土壤研究所
• 中文摘要： 中興新村廢水污泥施於中興大學農場之土壤後，有機質分解情形，經由實驗孵育觀察。在4%（80公噸／公頃）污泥施用率以下，土壤二氧化碳之釋放率以浸水處理較 25%水分處理為高，但在 8%施用率時則情況反是。污泥施用率在 4%以上可造成土壤嫌氣狀態；4%以下，土壤之二氧化碳釋放率略與施用率成正比。二氧化碳之釋放量可以一時間之指數方程式表示。此系統之有機質分解值約為2.3。污泥中有 3%之「活性有機碳」係促使初期污泥快速分解之成分。加入污泥在浸水狀態下起應效果顯著；在 25%水分狀態效果不顯著。起應效果與溫度有關。污泥之分解感應溫度變化之反應甚為快速，在 10°C範圍內，一天即可與溫度平衡。利用 Hsieh所發展的指數模式可預測污泥在土中分解之情況。
• 英文摘要： The organic matter decomposition of aChung Hsing New Village sewage sludge-soilsystem was observed in laboratory incubationconditions. At sludge rates below 4% dryweight, evolution was greater in thesubmerged condition than that of the 25%moisture condition. However, at the 8% sludgerate, the relation was reversed．Evidences ofanaerobic condition were observed during theincubation at sludge rate higher than 4% (80tons/ha). Below the 4% rate, evolution fromthe system was proportional to the sludge rate. The evolution can be well expressedby an exponential function of time. The value for organic matter decomposition in thiscase is 2.3. There are 3%“active organiccarbon”found in the sludge, which is responsiblefor the rapid decomposition in the initialincubations. There was a significant priming effect foundin the sludge-soil system under submerged con-dition, while only slight priming effect wasfound in the 25% moisture treatment. How-ever, the priming effect of the system wasaffected by the incubation temperature. Theresponse of the decomposition rate of the sludge-soil system to a sudden change of temperatureis relatively rapid. It took only one day orless to equilibrate with the final temperature ina 10°C range of change. The Hsieh's model onsewage sludge decomposition in soil could fitwell to the system studied.
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