Procter & Gamble (P&G) has a successful deep geothermal well at its Xiqing, China plant. The project was considered relatively low risk due to numerous existing geothermal wells that were already used for winter heating. A well at a depth of 3,000 meters extracts 80 degrees Celsius water which is run through a heat exchanger and used for heating process water, including boiler make up and building heating lines. The cooled geothermal fluid is then returned to the reservoir through a nearby injection well.
This case study originally appeared in The GEMI Quick Guide on Renewable and Alternative Energy.
Image: Drilling a geothermal well in 2012 at the Procter & Gamble plant in Xiqing China
Source: Procter & Gamble