Treatment Steps | City of Oconomowoc, WI (2024)

FAQs

Treatment Steps | City of Oconomowoc, WI? ›

Public water systems often use a series of water treatment steps that include coagulation, flocculation, sedimentation, filtration, and disinfection.

Public water systems often use a series of water treatment steps that include coagulation, flocculation, sedimentation, filtration, and disinfection.

The primary treatment phase of sewage involves the removal of coarse solid materials through filtration and sedimentation. The diluted sewage is passed through a series of filters of sequentially small pore sizes to remove large floating objects.

The water entering WWTPs undergoes a series of physical, chemical and biological processes to remove the pollutants it contains. These processes are usually divided into four stages known as preliminary, primary, secondary and tertiary treatments.

There are five steps in the wastewater treatment process: pre-treatment, primary treatment, secondary treatment, the disinfection process, and the release. Improper execution and/or skipping any of these steps can have disastrous effects on local water supplies and public health.

Upon completing the steps of sourcing, screening, coagulation, flocculation, sedimentation, and filtration, the water reaches the stage of disinfection, a process vital to its safety through the eradication of harmful bacteria, viruses, and other health-threatening microorganisms.

The raw water is delivered to the headworks of the water treatment plant where the first of 5 major unit water treatment processes start the treatment to make the water safe to drink. The 5 major unit processes include chemical coagulation, flocculation, sedimentation, filtration, and disinfection (described below).

How clean is water after sewage treatment? ›

Chlorine is fed into the water to kill pathogenic bacteria, and to reduce odor. Done properly, chlorination will kill more than 99 percent of the harmful bacteria in an effluent.

The sewerage system pumps the sewage to a treatment plant where it is processed and treated to remove any contaminants. Once treated, the resulting effluent is released back out into waterways, where it continues its journey through the water cycle.

Cost To Install and Supply a Sewage Treatment Plant

In domestic premises, prices start from £2,000 subject to the size of the sewage treatment plant. The price of installation will vary and a site survey is generally required for an accurate figure.

The purpose of this stage is to filter the sewage of debris, sand, grit, and large particles. The primary stage involves separating solids from liquids. The sewage is pumped into sedimentation tanks, where gravity forces solids to the bottom of the tank. The water is then released, leaving behind a sludge/slurry.

Recharging consists of five stages: Fill, Brining, Brine Rinse, Backwash and Fast Rinse.

The raw water is delivered to the headworks of the water treatment plant where the first of 5 major unit water treatment processes start the treatment to make the water safe to drink. The 5 major unit processes include chemical coagulation, flocculation, sedimentation, filtration, and disinfection (described below).

The three stages of wastewater treatment are known as primary, secondary and tertiary. Each stage purifies water to a higher level. In some applications, only one or two stages are necessary. The level of treatment necessary depends on the water's intended use case, and what environment it will be discharged into.