第五章 結論與建議
5.2 建議事項
1. 本研究結果顯示污泥掺合土壤中 DEHP 降解速率較為緩慢，建議掺合前先以 其他處理程序降低污泥餅中 DEHP 濃度，再與土壤進行掺合，應較無安全上 之疑慮。
2. 固然本研究之中央合成設計結果可推估實際不同污泥餅中 DEHP 濃度，其在 不同掺合比率下之 DEHP 降解率，但仍有進一步探討如何提升 DEHP 於污 泥掺合土中降解速率之必要性。
3. 由於 DEHP 在好氧與厭氧狀態下皆可能存在於下水污泥餅中，尤其在厭氧狀 態下極有可能產生累積或幾乎無降解之現象，而國內目前所興建較具規模之污 泥處理廠大多以厭氧為主要處理方式，因此需特別注意 DEHP 於污泥餅之未 來濃度變化趨勢。
4. 本研究僅針對污泥掺合土中 DEHP 有機污染物質進行討論，未來實際將污泥 施用於土壤上時，應一倂考量污泥掺合土壤後，有害重金屬及可能過剩營養鹽 其對環境造成之負面影響。
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