Biochar Applications for Wastewater Treatment summarizes recent research development on biochar production and emerging applications with a focus on the value-added utilization of biochar technology in wastewater treatment, succinctly summarizing different technologies for biochar production and characterization with an emphasis on feedstock selection and pre-/post- treatment. The text discusses the mechanisms of biochar's various roles in different functions of wastewater treatment and includes the latest research advances in manufacturing optimization and improvements to update the carbonaceous materials with desirable environmental functionalities. Discussion and case studies are incorporated in treating municipal wastewater, industrial wastewater, agricultural wastewater, and stormwater to illustrate and emphasize the promising prospects of biochar technology in the treatment of various wastewater in actual utilization. Perspectives and future research directions of the emerging biochar technology in wastewater treatment are presented to provide insights for the readers and researchers in biochar application in wastewater treatment.