Text Box: RECLAIMED WATER

 

 

 
 

Text Box: The aim of this project was to assess the efficacy of the North Carolina water reuse regulations  in the context of a municipal reuse system in Charlotte, North Carolina. The assessment tasks included: (a) collection and review of monitoring data from the plant; (b) monthly reconnaissance sampling of effluent at the plant and from the irrigation site; (c) a review of recent and pertinent literature on microbiological contaminants associated with reclaimed water; (d) development of a water balance model to predict changes in fecal coliform loadings in run-off flow with various set-back distance requirements; and (e) a compilation and review of other state reuse guidelines and regulations related to use of reclaimed water in areas of public access. Assuming that a site receiving reclaimed water irrigation is not subject to other sources of fecal contamination (livestock, wildlife, or pets), it should be possible to calculate the maximum fecal coliform loading to a nearby stream based on the surface area irrigated and the maximum allowable coliform limits that apply to the site. A water balance model was constructed and applied to the Tradition Golf Course site to predict coliform loadings to nearby surface water with and without a buffer region under a variety of conditions. The model was designed to predict worst case concentrations of fecal coliforms in the receiving stream, and it was written so that the following parameters could be varied:  irrigation rate, fecal coliform concentration in the reclaimed water, topography, soil classification, ground cover, percent coliform capture in the buffer length, and die-off coefficients for fecal coliforms.   r fecal colifs.

 

 

 

 

 

 

 

 

 

 

 Links to Summaries of State Water Reuse Regulations

 

Water Quality

Treatment

Reliability

Site Specifics

Buffers and Storage
 

Text Box: Summary of Parameters Monitored and Sampling Locations

 

Sample Location

Parameter

 

 

Treatment Plant Monitoring

BOD5, NH3-N, turbidity, fecal coliforms (reported by MCWWTP)

COD, NO3-N, PO4-P, fecal coliforms, chlorine residual (n=3); C. perfringens, somatic coliphage, and F+ phage (n=1).

Irrigation flow

Tests performed at test site golf course. Reclaimed water is pumped directly to irrigation headers with no intermediate detention in a holding pond

COD, pH, NO3-N, PO4-P, Cl2 residual, fecal coliforms, (n=3);

C. perfringens, somatic coliphage, and F+ phage (n=1)

Stream flow

(up and down- stream)

COD, pH, NO3-N, PO4-P, Cl2 residual, fecal coliforms, (n=3);

C. perfringens, somatic coliphage, and F+ phage (n=1)

Grass

Tests performed on grass under irrigation headers, on grass in buffer zone, and on grass in control region far from buffer zone

C. perfringens, somatic coliphage, and F+ phage (n=1)