Laundry wastewater surfactant reduction

[tungnihsif]

Can any tell me how to reduce the surfactants from a laundry waste stream. The FDEP has a contamination limit at 2 mg/l as a residual in the soil. The treatment process now is aeration and filtration and the concentration runs between 250-500. The wastewater is disposed in a typical subsurface drainfield. Am I wrong in arguing that the detergents are biodegradable. I am testing an additive (basically grease) and seeing some reduction (50%). Maybe just increase the dose? Seems kind of odd to add grease to waste water but what the heck. Any help would be appreciated.

 

[bimr]

The typical activated sludge process will remove the surfactants. The surfactants are biodegradeable.

Aeration alone is not going to do much.

Investigate the intallation cost of a package treatment plant.

 

[tungnihsif]

Are there small package "off the shelf" options for activated sludge treatment? This plant sees 8000 gpd max.

 

[bimr]

This firm shows some data sheets for small units.

http://www.pollutioncontrolsystem.com/package.asp

http://www.pollutioncontrolsystem.com/downloads/PackagePlantVolumeDimensionData.pdf