OZONATION PILOT STUDY
NEWMARKET, NH

Pilot study equipment

Ozonation was investigated for raw water from the Piscassic River near the existing water treatment facility in Newmarket, New Hampshire. The investigation was completed using a team that included the Town of Newmarket (pilot operation and equipment assembly), UNH (water quality analyzers, testing, and financial assistance) and DG Engineers of Windsor, Vermont (pilot design, assistance in equipment assembly, project overview, and final report.)

As “Side-stream” ozonation is a relatively new technology, DG recommended piloting to assess process variables and confirm manufacturer’s claims for process results. “Side by side” pilot operation was specifically recommended to eliminate changes caused by raw water changes.

The pilot results are summarized, as indicated below:


KEY FEATURES

• Will ozone (O3) remove taste and odor? YES.
• Consistent manganese removal acheived with activated O3? NO.
• Will O3 eliminate color? YES.
• Will the filters become biologically active using O3? NO.
• Will O3 improve TOC removal? NO.
• Is the clarification/filtration process enhanced with O3? YES.
• Compliance with the D/DBP Rule achieved with O3? NO.

Based on the results, DG recommended that Newmarket not proceed with ozonation alone. The information obtained during the pilot stage was crucial in preventing the expenditure of $1,000,000 in local funding for a process that would not accomplish all of the treatment objectives, particularly compliance with the Disinfectants/disinfection ByProducts (D/DPB) Rule.