Most of the time, industrial wastes contain recoverable resources that would be useful in other applications. For example, greywater have enough nutrient to support the growth of microalgal biomass that are useful for biofuel production. Similarly, solid waste generated in metal extraction industries often contain high concentration of other metals that could be extracted using various processes. This book presents a critical overview on the current nanotechnologies that are being utilized for extraction of valuable resources from various industrial and domestic wastes. This book presents research, reviews, and case studies on the extraction of metal, organic compounds, energy and nutrients from waste through nanotechnological interventions.