Facing New Regulations, City to Study Treatment and Disposal Options

(NASHVILLE, TN – October 22, 2010) – Faced with a significant regulatory challenge, The City of Murfreesboro has commissioned Hazen and Sawyer to identify the most economical and technically-sound solution for effluent treatment and disposal, considering forecasted distribution of growth and development in the service area. The City maintains an extensive reclaimed water system; however, the Sinking Creek Wastewater Treatment Plant (SCWWTP) is approaching the permitted effluent flow limit of 16 mgd, bringing a plant expansion or a new decentralized treatment facility into consideration. The City’s service area is traversed by numerous low-flow streams, many of which are either designated as impaired per the 303d list or already have a Total Maximum Daily Load (TMDL) developed.

A large component of the evaluation is the consideration of advanced treatment technologies, such as submerged membrane bioreactors (MBR), integrated fixed film activate sludge (IFAS), and moving bed bio-reactors (MBBR). The decision to implement an advanced treatment technology will depend on the location of suitable effluent disposal, total present worth, and the comparison of a satellite facility cost with extensive collection system improvements for capacity and infiltration and inflow (I/I) rehabilitation.

The study will include reviewing and verifying current population projections and distributions for the City in 5-year increments for a 20-year planning period, as well as a review of centralized and decentralized treatment alternatives for effluent disposal. The study will consider both expansion opportunities at the SCWWTP and a satellite or scalping facility in the service area in the vicinity of feasible effluent disposal options.

Since our founding in 1951, Hazen and Sawyer has focused on two things: providing safe drinking water and controlling water pollution. Our range of services encompasses the planning, design, and construction management of water and wastewater-related projects – from clean water treatment, storage, and distribution to wastewater and stormwater collection, treatment, and reuse.

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