台灣地區都市生活垃圾主要是以焚化為主,焚化後產生之底渣為無害之廢棄物,且產量大性質近似天然骨材,若不做資源化相當可惜。加上近年政府推動「零廢棄、全回收」之政策,底渣再利用研究相關文獻量也相當多,但低渣若要資源化主要嚴重問題為氯離子,應用在含鋼筋混泥土會造成鋼筋腐蝕,因此本論文試圖闡述一種底渣再利用產品之可行性,將底渣進行分篩使用熱水水洗進行前處理並配合電解使之符合法規標準並定義一種低氯產品為100ppm以下,並探討底渣水洗前後氯平衡分析、淋洗液特性以及淋洗後之沉澱池汙泥(水尾土)再利用探討。 底渣去氯經過分篩不同固液比1:0.6、1:1、1:1.5連續淋洗以1:1.5去除效果最好,去除效率接近95%。之後配合電化學總去除率接近97%,且其氯溶出濃度皆在70 ppm以下符合預期的低氯產品目標。在氯平衡分析上使用大量熱水淋以固液比1:1.5誤差值可以縮小到0.28%。淋洗液以放流水標準來探討有多項可達到放流水標準,水尾土再利用上是製作成水溝蓋,並用卡車實廠沒有破損。
In Taiwan, the municipal solid waste are mainly treated by incineration and after the combustion residual bottom ash is a harmless waste, And it can be resued as natural aggregate. Coupled with these year the government to promote「zero waste, recycle」 policy. The bottom ash can be reused in many fields, but they have a serious problem that chloride ion in bottom ash is too high for using in reinforced concrete. Therefore,this paper tried to reuse the feasibility of the bottom ash, the bottom ash sub-screen using the hot water washing pre-treatment and with the electrolysis to comply with regulations and standards and the definition of a low-chlorine products for less than 100ppm. To explore the bottom before and after the residue washed chlorine balance analysis, the characteristics of the eluent and the sedimentation tank sludge leaching (wastewater sludge) utilization. The best chlorid removal percentage from bottom ash was found 95% by using solid-liquid 1:1.5, it is better than that of 1:06 and 1:1. If case of a combination using of electrolysis, the total removal percentage was near 97%. The goal for requsted low chlorine has been defined as 70 ppm. In the analysis of the chlorine balance, use the hot water for the error can reduced to 0.28% by using solid-liquid 1:1.5, eluent to explore the effluent standards for the number can be achieved with this. The wastewater sludge from bottom ash recycling plant is made into a drain cover, and is not broken after weighting test.