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Nitrogen Removal for Cluster Residential and Commercial Development, Main Street Village, Mashpee, MA

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The Main Street Village, which has 24 housing units and small commercial space, was created with a 5,226 gpd design flow, community-sized wastewater treatment system. The wastewater system is located in a defined nitrogen sensitive area, a Zone II of a public water supply well. Zone II areas are contributing to a water supply well.

The development is served with Town water and the entire Wastewater System includes a wastewater collection system, septic tank, and Waterloo Biofilter followed by a Nitrex Filter to reduce effluent total nitrogen prior to discharge to a drainfield. Permit effluent requirements are TN must be < 10 mg N/L. The Wastewater System became operational in March 2006.

After the start-up period, wastewater effluent TN levels have generally been < 3 mg N/L. Effluent BOD and TSS are typically < 10 mg/L and < 10 mg/L, respectively.

Operations and Maintenance requirements consist of monthly visits for routine maintenance and treatment system performance sampling. Daily electrical consumption is approximately 5 KWHr, or $0.75/day with electric costs of $0.15/KWHr. Telephone connection allows remote monitoring of flow and notification of alarm conditions. No chemicals and no other utilities are required.

The wastewater treatment technology demonstrates that decentralized distributed wastewater systems can be as effective as centralized facilities in achieving the accepted limit of technology of TN < 3 mg N/L, and is another tool for wastewater planners and engineers in nitrogen sensitive areas.

The presentation will discuss the project's development, its operation and latest performance data.


Document Type: Research Article


Publication date: 2007-10-01

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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