因台灣地小人稠，近年來因大多的掩埋場已飽和且處理污泥之費用年年增高，大量的廢棄淨水污泥採用掩埋方式並不是良好之處置方法，若能有效利用此類廢棄污泥，必定能節省下大筆的清運以及處理費用。本研究利用酸浸漬法對淨水污泥進行溶出試驗，以批次試驗配合不同之硝酸濃度、反應時間、反應溫度，探討出最佳之總鐵、總錳之浸出效率，再以最佳溶出參數配合高溫爐鍛燒進行鐵錳氧化磁體之製備，得產物經水洗後，利用X射線繞射分析儀(XRD)進行分析定性，研究所製備之產物為鐵錳氧化磁體，再以超導量子干涉震動磁量儀(SQUID VSM)進行樣品之飽和磁化量、矯頑磁力及磁滯損失等分析。經XRD、VSM等儀器分析得知結果，證實本研究成功地將淨水污泥製備成具有順磁性之鐵錳氧化磁體，既能將淨水廠所需多支付之處理污泥之費用降低，也能達到將廢棄物有效回收之目的。 Because Taiwan has a highly dense population, in recent years, the landfill has become saturated and the cost of sludge treatment increases year after year. Sludge from wastewater treatment are disposed in landfills which is not a sustainable method. Having an effective and efficient use for the wastewater sludge saves a great amount of money from the disposal cost.In this study, acid impregnation was used on wastewater sludge for the dissolution test. Batches with different concentrations of nitric acid, reaction time, and reaction temperature were explored for the best total iron, and total manganese leaching efficiency. The optimum batch parameters were then used for the preparation of ferromanganese oxide (MnFe2O4) by high-temperature furnace calcination. The main product was then obtained by washing. Using X-ray diffraction (XRD), the purified samples were analyzed qualitatively, then superconducting quantum interference device vibrating sample magnetometers (SQUID VSM) were used to determine the saturation magnetization, coercive force and hysteresis losses.By XRD, VSM and other equipment, the results confirmed that this study has successfully produced ferromanganese oxide from wastewater sludge. This reduces cost of both the wastewater treatment as well as the sludge treatment. This study shows the successful and effective recovery of waste.
