Challenge

Due to the increase in tourism and the development of residential communities, the Ho-Chunk Nation Indian Tribe realized they would need to install a new wastewater treatment facility to meet future and current requirements.  Also, with the strength of waste almost three times above the norm for domestic waste streams the existing system was in jeopardy of failure.

Solution

With the need for nutrient removal and the requirement to handle widely varying biological loads, the OMNIFLO® Sequencing Batch Reactor (SBR) process was the logical choice.  Additionally, the OMNIFLO® SBR process was a beneficial option because of its ability to be operated remotely via a computer SCADA system, thus reducing on-site staffing for operation. 

The design can handle a wide range of loadings, and achieve nitrification, denitrification and biological phosphorous removal.  This is critical in this application since the wastewater is high in BOD and total nitrogen.

The Ho-Chunk Nation agreed to the project contract based on the trust of the companies involved and the experience the suppliers had on previous project.

Results

The project moved from concept to completion in six months with start-up of the facility in March 1998.  Since then the facility was expanded which more than doubled their treatment capacity.

Average Designed Flow: 300,000 GPD
Average Actual Flow: 90,000 GPD

	BOD		Nitrogen
	Influent  mg/l	Effluent  mg/l	Influent mg/l (TKN)	Effluent  mg/l (TKN)
Design	510	50	100	10
Actual	530	16	105	9

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