- Our Community
- Community Overview City History Community Demographics Chamber of Commerce Events and Activities City Calendar City Parks On-Line Store Cemeteries Local Weather Photo Gallery
- Library School District Public Safety Emergency Management Police Fire ADA Compliance Americans with Disabilities Wall of Honor Wall of Honor
- Grove Regional Airport Grand Lake Association INTEGRIS Grove Hospital Har-Ber Village Lendonwood Garden Playmakers Theatre Cayuga Mission
- Doing Business
- Welcome Visitors
- Grand Lake Association Grove Area Chamber of Commerce Grove Regional Airport Playmakers Theatre
- Cayuga Mission Grand Lake Queen Har-Ber Village Lendonwood Garden Starbirds National Rod Custom Car Hall of Fame Grand River Dam Authority (GRDA)
- On-line Store Photo Gallery Events Where to Eat Where to Stay Where to Park in Downtown Grove Wolf Creek Park & Boating Facility
- Inside City Hall
- Contact City Hall Staff Directory Submit a Complaint or Comment City Code Comprehensive Plan Jobs - Equal Opportunity Employer Non-Discrimination Download Employment Application Submit Employment Application
- Agendas and Minutes City Council Boards and Committees Convention and Tourism Bureau Economic Development Authority Municipal Airport Authority Municipal Service Authority Planning and Zoning Board Zoning Board of Adjustments ADA Compliance Americans with Disabilities
- Departments Administration Airport Buildings and Grounds Community Development Economic Development Finance Fire Emergency Management Municipal Court Police Public Works Utility Services
- Helpful Resources
- Alerts and Notifications Email Subscriptions Events and Meetings Agendas and Minutes City Calendar In the News City News
- Contact the City Staff Directory Submit a Request or Concern Code Red Code Red Login Documents and Forms Documents and Reports Forms, Permits and Applications Maps
- Social Media City of Grove on Facebook Wolf Creek Park on Facebook Grove Animal Control on Facebook Frequently Asked Questions Frequently Used Numbers Helpful Links
Water Treatment Process
Raw Water
The treatment process begins when raw water is pumped into the plant from a floating intake structure.
Coagulation/Flocculation/Sedimentation
The Water Treatment Plant has two Flocculation/Sedimentation basins running parallel. Each basins can treat up to 2.2 million gallons of water per day as the water passes through these stages:
Coagulation: In the flash mixers, treatment chemicals called coagulants are rapidly and uniformly mixed with the raw water. The coagulants act like magnets so smaller particles stick together to form heavier clumps, called "floc."
Flocculation: During flocculation stage, the larger, heavier floc will sink to the bottom of the tank, taking impurities with it. This process also prepares the lighter particles for removal by sedimentation and filtration.
Sedimentation: In the sedimentation basin, the flowing water is slowed down to allow gravity to pull suspended particles to the bottom. Each sedimentation basin is comprised of four zones:
- The Inlet Zone distributes the flocculated water uniformly from the top to the bottom of the basin.
- The Settling Zone is the largest portion of the basin. It provides calm, undisturbed storage of flocculated water to permit effective settling of the suspended particles.
- The Sludge Zone is at the bottom of the basin. It is a temporary storage area for the settled particles. The basins are routinely drained and cleaned and the excess sludge is washed to a designated sludge holding pond on-site which is cleaned annually and land applied.
- The Outlet Zone provides a smooth transition from the sedimentation basin to the filter, at this point we add Powdered Activated Carbon to reduce taste and odor in the water.
Filtration
The final step in the solids removal process is filtration. Here the water passes through a bed of material such as sand and coal to remove particles that did not settle out in the basins. The plant has 6 filters, each filter is 13 feet by 13 feet by six feet deep containing 20 to 30 inches of granular anthracite over 12 inches of sand. The filters are backwashed on a regular schedule to remove the captured material and send it to the “Backwash to Waste” holding pond.
Clearwell
The filtered water flows from the filters to a 300,000 gallon, underground storage tank known as a clearwell. Here chlorine is added to the “finish water” to kill any pathogens (disease-causing germs). The water snakes through baffles to maximize chlorine contact time. Two Backwash pumps and three high-service pumps are located at the end of the clearwell baffle train. The backwash pumps use the “finish water” to clean the filters and the high-service pumps are used to pump the disinfected “finish water” from the clearwell to the distribution system.
