Xylem Awarded Silver Medal for Concept Product
Xylem, a global leader in water technology, was recently presented with a Silver Medal Innovation Award from Deutsche Landwirtschafts Gesellschaft (DLG), a German agriculture organization for its unique “Fermenter Heat Exchanger” product concept.
The award was presented at the 2014 Bioenergy Decentral Fair, which took place at Hanover Fairground from November 11-14.
“At Xylem we strive to develop innovative, energy-efficient solutions to customers’ key challenges related to water and renewable energy,” says Dr. Annita Nerses, General Manager and Director of the Biological Treatment business segment. “We are delighted that the significant potential of our new product idea has been recognized with this award."
The product concept is based on the Flygt Submersible Mixer. Biogas digesters have a high heat demand and require a constant temperature of 40 degrees Celsius in order for bacteria to produce biogas. Today’s heating systems in a digester involve heating pipes mounted close to, or inside, the wall of the digester. Because the flow of the fluid during mixing is very low on the wall, many pipes are required.
Xylem’s product concept integrates mounting of a compact heat exchanger with the high-efficiency Flygt mixer in the biogas digester, which positions the heat exchanger just in front of the mixer where the highest flow and heat transfer within the biogas digester is guaranteed. The high heating performance and fast-running mixer-based system is easy to install, easy to operate, and the most efficient alternative.
This unit, consisting of a fermenter heater and submersible mixer, can be installed without major structural outlay and can be retrofitted in existing tanks. The installation only requires a few hours and can be put in place while a digester is in operation, making maintenance or adapting the installation a simple procedure.