Town of Luray, VA
Project #1 – 1.6 MGD Biological Nutrient Removal (BNR) WWTP Upgrade:
After several tries with other engineering firms the Town of Luray, VA hired Reid Engineering Company due to their unique design approach for the proposed Nutrient Upgrade for their existing 1.60 MGD oxidation ditch system. Reid Engineering services consist of the following:
- Preliminary Engineering Report
- BioWIN Modeling
- VA DEQ Permitting
- WQIF, VRLF and VRA Grant and Loan Assistance and Management
- Design WWTP upgrade to meet Total Nitrogen = 4 mg/l and Total Phosphorus = 0.3 mg/l
- Bidding and Construction Phase Services
- Resident Project Representative
- O&M Manuals
A two-stage Modified Ludzack-Ettinger (MLE) activated sludge process followed by denitrification/tertiary filtration was determined to be the most reliable and cost effective means for complying with the nutrient removal objectives for the facility. The major treatment system modifications and new treatment system components are as follows:
- The two existing oxidation ditch activated sludge basins will be modified to operate in series as a MLE biological nitrogen removal process.
- New jet aeration system will be installed in each oxidation ditch to provide mixing and aeration.
- New nitrate recycle pump station.
- Upgrade existing Clarifiers.
- New Secondary Clarifier New Continuous Backwash Up-Flow Denitrifying Sand Filters.
- New chemical storage and feed equipment.
- Upgrade of SCADA System.
Project #2 – Booster Pump Station Upgrade:
Reid Engineering Company, Inc. prepared a Preliminary Design Summary and Final Design plans and specifications for a booster pump station for the Town of Luray water distribution system. Scope of services included the evaluation of the existing distribution system and the design of a booster pump to accommodate the current and future needs of a residential subdivision within the service area.
The pump station was designed with automatic pump operation to maintain a constant pressure during low and high service level conditions which provides better service to the resident and reduced energy usage by the pumps. The existing distribution system to the booster pump station was also evaluated to determine weak points in the system and identify cost effective future improvements.