News

Elizabethtown Water Company - Raritan Millstone Water Treatment Plant - Replacement of Tube Settlers and Troughs in Basin No. 3 and 4

100_0178_web

Inspections by EWC revealed that damage to the tube settler modules and effluent troughs warrant their replacement in both Basin Nos. 3 and 4. BS&J was selected to prepare contract documents to purchase new tube settler modules and effluent troughs, make minor repairs to the structural steel support system, paint the sludge collector access walkways, and to install the new modules and troughs. The contract for construction of the replacement was awarded to Remsco. The structural steel support system was found to have pit corrosion with no significant loss of section. Basin Nos. 3 and 4 were originally constructed in 1978. Since then, the tube settler modules and effluent troughs were replaced in 1990. Work in Basin No. 3 was completed in 2001 and Basin No. 4 in 2002. It appears that the longevity of the past tube settler modules and effluent troughs is about twelve (12) years.

Part of our services is to identify and recommend alternative tube settler and effluent trough designs and manufacturers. The basins are open and in the winter unprotected from severe weather. There is a concern for ice damage, particularly when the basins are partially drained for cleaning and the weight of ice on top of the modules is excessive.

Repairs to the existing reinforced concrete basin walls were not required at this time. However, where the effluent troughs pass through the concrete walls of the basin, the concrete was repaired after the new troughs were installed to restore the concrete around the new troughs.


headHomeheadNewsheadAboutheadProjectsheadServicesheadCareersheadLinksheadContact