Evoqua to deliver Alkagen AQ solution at Siesta Key wastewater treatment plant in US


Evoqua Water Technologies has been selected to provide its Alkagen AQ solution to help control odour and extend the life of existing infrastructure at the Siesta Key wastewater treatment plant (WWTP) in the US.

Alkagen AQ is a rapidly dissolving and controllable pH shift technology that enables sulfide control within seconds of application.

The solution also helps reduce the impact of fats, oils and grease in collection systems as well as offers a beneficial alkaline supplement.

Located in Sarasota, Florida, the Siesta Key WWTP processes about 1.3 million gallons of wastewater every day, in addition to providing service to more than one million tourists who visit the Siesta Key barrier island each year.

Sarasota County utility operations manager Michael Mylett said: “The novel approach of adding Alkagen solution directly to the headworks influent piping reduced the loading on the existing chemical scrubbers, thus allowing them to more effectively mitigate hydrogen sulfide odours.

“This makes the plant a better neighbour for the surrounding residential and tourism area.”

Sarasota County elected to decommission the wastewater treatment plant due to the age of the WWTP, and decided to convert it to a master lift station.

The transition would require a solution that would help remove hydrogen sulfide odours from the effluent of an underperforming chemical scrubber.

Evoqua’s Alkagen AQ solution has been selected as it can be fed directly into the influent stream, thereby locking hydrogen sulfide in liquid form and reducing the load on the chemical scrubber.

The Municipal Services division of Evoqua entered into a build, own, operate agreement with Sarasota County to deliver the Alkagen solution, in addition to a feed and storage platform, at the Siesta Key WWTP.