Eng. Alkhrissat is a Lecturer in the Civil Engineering Department at Al-Ahliyya Amman University. He attended the University of Jordan for graduate study in civil engineering, specializing in water and environment. Wastewater treatment methods, anaerobic digestion, and bioenergy recovery are areas of particular interest to him. Recently, his work has focused on sustainable wastewater treatment technology development, sewage sludge management, and bioenergy recovery from sludge and animal manure.