水熱法為在封閉環境下利用水或是其他溶劑作為液相介質,在高溫高壓的條件下進行化學反應,具有低汙染、汙染控制方法簡單且操作條件簡單,是一種具有巨大潛力的處理技術。電解法具有氧化降解能力,且無須額外添加化學藥劑,能在常壓常溫下進行且不會產生二次汙染。 本研究使用水熱技術結合電解技術降低底渣中有機物質以及其他有害物質,以求達到無害化、減量化等用途。研究結果顯示 (1)水熱處理後底渣中的鈉、鋁、氯含量皆有下降,其中氯從原渣4.1Wt%,可以降至0.053Wt%,但隨著製程溫度再提高時氯含量開始增加,這可能是因為溶液中的氯離子合成KCl導致固體中的氯含量增加。(2)底渣鉛溶出會隨著製程溫度提高而增加溶出,水熱處理程序可能會導致焚化底渣中重金屬鉛的移動性增加。而所有的底渣樣品皆小於限值,故底渣再利用鉛溶出的部分是沒有疑慮。(3)底渣中可溶性氯鹽經由水熱處理程序後,氯含量最高可以削減94%。證實水熱處理可以降低底渣中的可溶性氯鹽。
Hydrothermal treatment is used water or solvents in a closed state as a liquid medium at high temperature and pressure conditions of a chemical reaction, which is low pollution, simple control method of pollution and simple operating conditions, is a treatment technology with great potential. Electrolysis can induce oxidative degradation, without adding additional chemicals. Which can be carried out at atmospheric pressure at room temperature and does not produce secondary pollution. In this study, using hydrothermal treatement combined with electrolysis technology to reduce bottom ash organic matter and other harmful substances, in order to achieve sound, reduction and other purposes. The research shows (1) after the hydrothermal treatment of bottom ash, sodium, aluminum, chloride content were decreased , wherein the chloride in residue was 4.1wt%, can be reduced 0.053wt%, but as the process temperature is further increased when the chloride content began to increase, which probably because chloride ions in solution leads to increased synthesis of KCl solid chlorine content. (2) bottom slag lead leaching will increase as the process temperature increases the dissolution hydrothermal treatment program may result in incineration bottom ash Pb mobility increases. Bottom Ash and all samples were less than the limit, so the bottom slag recycling is not part of lead leaching concerns. (3) bottom ash soluble chloride via the water after the heat treatment process, the chlorine content can be reduced up to 94%. Confirmed that the hydrothermal treatment could reduce the bottom ash soluble chloride.