This book summarizes the recent research development concerning olive oil wastewater management: characterization, environmental impact, recovery and treatment. The book combines different chapters on the management of olive oil rejects using simple techniques with low investment and operating costs. The main focus of the book is:- Diagnosis, impacts of olive oil waste, and regulations- The valorization of the margins and the olive waste- Wastewater treatment and recovery- Evaluation of investments and operating costs of treatment techniques- Shaped by experience, the authors present their view and approach to each focus area of managing liquid and solid waste produced by crushing units.