Benefits of turning waste water to green energy

Advanced anaerobic technology from Global Water Engineering can be used globally wherever industry has a biological waste stream or wastewater with high organic carbon or COD (chemical oxygen demand) of natural origin that can be broken down into biogas by anaerobic bacteria.

The technology – now proven at more than 300 food, beverage, agro industry  and processing plants worldwide -  simultaneously cleans the water to high discharge standards while producing biogas (methane) to generate green electricity or to fuel boilers and other factory plant fuel consumers.

A major producer of native tapioca starch, sweeteners and modified starch in Thailand, for example, uses GWE anaerobic technology within its wastewater plant to produce up to 70,000 Nm³ a day of biogas at 70 per cent methane, or CH4^. This corresponds with circa 43,750 kg a day of heavy fuel oil, worth $US 12.7 million ((9.5 million Euro) a year. (This assumes a plant running 330 days a year at full capacity and a Heavy Fuel Oil, HFO, price of 0.83c US or .62 Euro a litre)

Operating with a capacity of 6000 m³ a day of wastewater, containing 150,000 Kg per day of COD, the Corn Products International plant, commissioned in 2007, also achieves high effluent purification levels of more than 95 per cent, reducing COD loads from 25,000 mg/l COD influent to 1250 mg/l effluent. 

“Anaerobic technology is particularly brilliant for food, beverage and agro industry applications, such as this installation.” says Global Water Engineering CEO Mr Jean Pierre Ombregt, who has been a world leader in anaerobic digestion of industrial effluents and green energy solutions for more than 35 years.

The reactor and biogas flare at Corn Products

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