Analysis on the Physical and Chemical Property of bottom ash from Diverse Incinerator

• Main Authors: Wei-Lin Chen, 陳韋伶
• Other Authors: Jyh-Dong Lin
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/23799761952075783919

碩士 === 國立中央大學 === 土木工程研究所 === 92 === According to the statistics from the Environmental Protection Administration, ash discharged by incinerators has been amounted to 1,051,602 tons by the year 2003. Burying is the strategy used to deal with them for the time being. However, as the construction of incinerators increases, the demand for economically effective way to recycle the waste is worth immediate attention. Materials in this research are mostly obtained from the waste discharged by three incinerators of Shulin、Shindian、and Bali. Before being applied to this research, these waste also went through the recycling plant in Yingko. Varied from different operations, these Bottom ash are further divided into three categories: Incinerator bottom ash、bottom ash of elementary beneficial clearout and bottom ash of wet-clean. The previous two divisions undergoes a 4.5 month of storage period - either alfresco stack or outside in water. Observing its changes on physical change & chemistry during the storage period , we have discovered that abrasion test before and after the storage period reveal that its physical property had never changed. In addition, the ANOVA demonstrates that differences among three incinerators not distinct. On the other hand, judged from their chemical property , the Bottom ash of three incinerators are actually quite similar. Successive tests and analysis of PH level, chlorate, Toxic Characteristic Leaching Procedures, XRF and X-ray diffraction unfold that the pH level tend to go down as time goes by and that rainfall and recycling of kitchen leftovers greatly reduce the amount of chlorate contained in Bottom ash ,while the conclusion of Toxic Characteristic Leaching Procedures, and analysis of XFR and X-ray diffraction remain unchanged during this storage period. Nevertheless, based on the consideration of sample quantity, more researches should be done on the chemical property of incinerator Bottom ash. Moreover, to realize its practicability, CBR & Potential Alkali Reactivity of Aggregates (Mortar-Bar Method) will also be operated on the Bottom ash produced by bottom ash of elementary beneficial clearout. The outcome tells us that bottom ash being utilized to the road-construction is feasible. On the contrary, concerning Alkali-Aggregate Reaction, Potential Alkali Reactivity of Aggregates (Mortar-Bar Method) proves Bottom ash is classified as active aggregate with which we should hesitate in applying to civil engineering.