Innovative Approach to Mixing Biosolids in Digesters

An automated mixing system helps an Illinois treatment plant improve biogas production and increase volatile solids destruction.

Sam Tatulli, left, biosolids mechanic, and Nick Menninga, general manager, adjust the Landia GasMix equipment via the SCADA system. Sam Tatulli, left, biosolids mechanic, and Nick Menninga, general manager, adjust the Landia GasMix equipment via the SCADA system.

Operators at the Downers Grove (Illinois) Wastewater Treatment Center worked for four years with the vendor to repair the compressor on the gas recirculating mixing system in Primary Digester No. 1.

“The compressor ran, but it wouldn’t move any gas,” says Nick Menninga, the plant’s general manager. Then Menninga took a tour of self-sufficient Danish wastewater treatment plants and their equipment vendors. At the Landia factory in Denmark, he saw the externally mounted GasMix digester mixing system.

“It was only after my return when we were evaluating different options for fixing or replacing the old mixing system that Landia entered the conversation,” Menninga says.

“Compared to other technologies, the GasMix retrofit was more economical to purchase and install.” In March 2017, Downers Grove became the first municipality in North America to operate a GasMix system.

Read the full article here

Related: Fix your troublesome Lift Station for good

Back

keyboard_arrow_up