Plant Blending Line

If a rainstorm event occurs that results in the influent flow being in excess of 27 MGD, the plant blending line (PBL) may be opened to divert any flow in excess of 27 MGD to the chlorine contact tanks for disinfection and to blend with the 27 MGD that is maintained through the treatment process. Utilizing the PBL is the last resort and is provided to prevent a hydraulic over-load which could washout the bio-mass (required for the biological treatment) to the Millstone River. During the use of the PBL, more sodium hypochlorite is needed for disinfection because a portion of the influent flow is being diverted from the biological process and the flows are much higher than normal. The use of the PBL is approved by the NJDEP.