A process for the preparation of anaerobic granules for waste water treatment comprising a) introducing various feed media into different anaerobic reactors containing an active biomass seed sludge with Volatile Suspended Solids content of 15000 mg/l and specific methanogen activity of 0.28 liter methane produced per gram of Volatile Suspended Solids and having bacterial aggregates of size below 1 mm; wherein the feed media comprise simple sugars and a source of nitrogen, phosphate and trace elements; b) providing mixing action of 80 rotations per minute to the seed sludge enriched with the feed media at a predetermined temperature of 40°C during an incubation period of 9-24 days; c) allowing the mixture formed in step b) to settle and form micro-anaerobic granules over said incubation period; d) transferring the micro-anaerobic granules produced in c) into another anaerobic reactor that has a cylindrical configuration and that operates in an anaerobic state, wherein said granules form a bed; e) introducing feed media or a carbohydrate rich industrial effluent from the bottom portion of the other anaerobic reactor; flowing the feed media or carbohydrate rich industrial effluent upwards through the micro-anaerobic granules bed within the other anaerobic reactor and discharging the treated feed media or treated carbohydrate rich industrial effluent as discharge through the upper portion of the other anaerobic reactor; f) recirculating at least a part of discharge of the anaerobic reactor of step e) at a pre-determined temperature of 22-4 °C, an organic loading rate of 2.5 - 16.2 kg COD/m 3.d, a pH between 4.0 and 9.0, and the alkalinity of the reactor in the range of 750-1500 mg/l; g) removing organic matter present in the feed media or carbohydrate rich industrial effluent waste water by means of anaerobic treatment while simultaneously producing granules and biogas such as methane; h) repeating steps e), f), and g) for 90 - 120 days until the micro-anaerobic granules develop into large anaerobic granules having predetermined physical properties. a) introducing various feed media into different anaerobic reactors containing an active biomass seed sludge with Volatile Suspended Solids content of 15000 mg/l and specific methanogen activity of 0.28 liter methane produced per gram of Volatile Suspended Solids and having bacterial aggregates of size below 1 mm; wherein the feed media comprise simple sugars and a source of nitrogen, phosphate and trace elements; b) providing mixing action of 80 rotations per minute to the seed sludge enriched with the feed media at a predetermined temperature of 40°C during an incubation period of 9-24 days; c) allowing the mixture formed in step b) to settle and form micro-anaerobic granules over said incubation period; d) transferring the micro-anaerobic granules produced in c) into another anaerobic reactor that has a cylindrical configuration and that operates in an anaerobic state, wherein said granules form a bed; e) introducing feed media or a carbohydrate rich industrial effluent from the bottom portion of the other anaerobic reactor; flowing the feed media or carbohydrate rich industrial effluent upwards through the micro-anaerobic granules bed within the other anaerobic reactor and discharging the treated feed media or treated carbohydrate rich industrial effluent as discharge through the upper portion of the other anaerobic reactor; f) recirculating at least a part of discharge of the anaerobic reactor of step e) at a pre-determined temperature of 22-4 °C, an organic loading rate of 2.5 - 16.2 kg COD/m 3.d, a pH between 4.0 and 9.0, and the alkalinity of the reactor in the range of 750-1500 mg/l; g) removing organic matter present in the feed media or carbohydrate rich industrial effluent waste water by means of anaerobic treatment while simultaneously producing granules and biogas such as methane; h) repeating steps e), f), and g) for 90 - 120 days until the micro-anaerobic granules develop into large anaerobic granules having predetermined physical properties.