Like many other municipalities in Georgia, Gwinnett County’s F. Wayne Hill Water Resources Center was concerned about the impact of releasing the plant’s current wastewater effluent into the environment. Although the current wastewater treatment plant (WWTP) was meeting existing discharge standards, the county decided to seek out new technology for its WWTP expansion that could also improve the quality of effluent produced.

When selecting a technology, the Department of Public Utilities of Gwinnett County consulted with Jordan Jones & Goulding, CH2M Hill, and Precision Planning, and decided on ZeeWeed ultrafiltration (UF) technology from SUEZ Water Technologies & Solutions. The system would treat secondary effluent

from the existing WWTP to produce a level of quality that exceeds some drinking water standards.

The final effluent is safely discharged to the Chattahoochee River, with the potential to be used for irrigation at local parks and golf courses. Upon approval by the State, the effluent will be released into Lake Lanier, a major source of drinking water for the greater Atlanta area.


Georgia is quickly becoming one the country’s leaders in advanced membrane water treatment systems. Local communities such as Cauley Creek, Forsyth County and Rubes Creek have each trusted GE Water & Process Technologies to supply water reclamation technology for their plants. 

With a nominal pore size of 0.04 micron, ZeeWeed UltraFiltration membranes are the key to effective tertiary treatment. The reinforced hollow-fiber membrane acts as a physical barrier, producing the highest quality effluent. In addition, the system’s modular design allows membranes to be added as the capacity requirement increases, drastically reducing upfront development costs.

Process Overview
After the secondary effluent is pre-screened by a 500 micron micro-screen, it will flow into the influent distribution channel. The level of influent in this channel determines the required number of membrane trains in operation. The water will then flow to the ZeeWeed membrane trains, where filtration is drawn through the membrane under a vacuum created by permeate pumps.  The reject water will flow via gravity to the backwash return basin.