Anaerobic Bioreactor technology is a combination of natural chemical process, Anaerobic biological treatment can be used to treat sewage water efficiently and economically to achieve the required quality of reclaimed water. The technology has three modules cascaded to achieve complete system primary treatment, secondary treatment and polishing treatment. AB Technology is designed based on the anaerobic digestion with polishing tertiary treatment and commonly used for sewage and grey water treatment. It is a biological treatment where in the absence of air or elemental oxygen organic digestion takes place. Many groups of anaerobic bacteria work together in the absence of oxygen to degrade complex organic pollutants into methane gas, carbon dioxide gas and water. The AB Technology greatly reduces up to 80 to 90% organic load and with polishing treatment the treated water is reused for gardening, toilet flushing, landscape, irrigation, cooling water, construction application etc.