Water Treatment Plant in Coimbatore
A water treatment process improves the quality of water so it can be used for a specific purpose. Among the many uses are drinking, industrial water supply, irrigation, river flow maintenance, water recreation, and safe return to the environment. The purpose of water treatment is to remove contaminants from water or reduce their concentration so that it is fit to be used for the purpose intended. It is crucial to the health of humans and allows them to enjoy both drinking water and irrigation.
As wastewater leaves homes and businesses through sewage pipes, it moves to a water treatment plant to be repurposed. Flowing wastewater from the sewage system to the treatment plant is accomplished through miles of pipes underground
During treatment, wastewater from commercial, residential, and industrial sources undergoes a series of processes in order to provide safe, clean drinking water.
Process for treating water in a treatment plant in Coimbatore
Responsibilities related to the system
As the City’s water supply system is operated, repaired, and maintained by the Water Treatment Plant in Coimbatore. Included in this are all parts of the supply chain for the water system, including:
Diversion and pumping facilities for raw water
- Pipelines carrying raw water
- Facilities for treatment
- Pumping facilities for water
- Storage facilities for finished water
- All assets are maintained with preventative maintenance programs.
Functions & Responsibilities
Water Treatment Plant responsibilities and functions include:
- Systems for pumping, controlling, feeding chemicals, and electric power
- Filters for anthracite and sand maintenance
- Monitoring water treatment plant processes continuously to ensure water quality
- Data acquisition, supervision, and control system operation
- Monitoring and compliance with the Safe Drinking Water Act and the Colorado Primary Drinking Water Regulations.
The process of treating water in a water treatment plant in Coimbatore
Step 1: Coagulation by chemical means
To break down naturally occurring organic matter, such as decaying leaves and other plant matter, chlorine dioxide is added as the first chemical. Primary coagulants are aluminum sulfate and calcium chloride. The water is also treated with polymers as coagulant aids to strengthen the bonding chains of the primary coagulant. A rapid mix unit adds chemical coagulants to raw water and creates turbulent mixing energies to disperse them thoroughly and begin coagulation. As a result of coagulation, very fine particles combine into larger ones that can be filtered, skimmed, drained, or filtered out.
Step 1: Flocculation
The coagulated water is then sent to the flocculation process as the next major unit process. Small coagulated particles form flocs after flocculation, which is a slow stirring process. During flocculation, floc particles contact particulates (sediment) in the water. Mechanical or hydraulic mixing produces gentle stirring that causes these collisions between particles. In two sets of flocculation basins, mechanical mixing paddles gently stir the coagulated water as it passes through. As a result of the floc formation, particulates in the water adsorb (adhere) to the surface of the floc, forming larger settle able particles that can be filtered and sediment easily.
Step 3: Sedimentation
In the next major unit process, sedimentation, the flocculated water flows. As a result of sedimentation, suspended solids (particles) that are denser (heavier) than water is removed and the particulate load on filters is reduced. In sedimentation, particles held in suspension are removed by gravitational forces by decreasing the velocity of the water being treated below the point at which the water can carry settle able suspended material. Settling solids move toward the bottom of sedimentation basins when the water is almost still. Water is sediment to remove almost ninety percent of its solids. Surface water is collected in the laundry tubes and directed to the filter gallery to remove the remaining ten percent of solids.
Step 4: Disinfection
In the Filtration Facility, settled water flows from the Pre-Sedimentation Building. At the pre-chlorination point, chlorine is added to the water to begin the disinfection process before it reaches the Filtration Facility. Water disinfection kills or inactivates most microorganisms in water, including bacteria, viruses, and intestinal parasites. Waterborne diseases such as gastroenteritis, typhoid, dysentery, cholera, and giardiasis can be caused by pathogenic organisms in the water.
Step 5: Filtration
As the last major unit process in the process of treating drinking water, the chlorinated settled water flows into the Filtration Facility. A filter removes particulate impurities from water by passing it through a material such as coal, sand, or another granular substance. The water treatment plant in Coimbatore uses multi-media gravity filters. A top layer of anthracite, a middle layer of filter sand, a bottom layer of garnet sand, and an underdrain system collect the filtered water are the layers of filters. Gravity causes the water to pass through the filter beds as it enters the filter media. As a result, the different materials function as a giant strainer that traps remaining particulates. Using a procedure called backwashing, the operators clean the filters when they begin to accumulate particles. In drain troughs, entrapped particulates are released as potable water flows through the filters. After settling, the backwash water is re-used in the raw water settling pond after being redirected to the Backwash Recovery Pond.
Wastewater Treatment Includes Four Stages:
Preliminary – Large, bulky solids are removed from wastewater at the preliminary stage using the following methods:
- Screening – large material is filtered out of wastewater as it passes through screens containing openings. Screen openings are reduced in size so that smaller waste materials can be separated.
- Grit removal – the water settles grit, sand, stones, and other small debris.
Primary – the first stage of water purification. Sedimentation tanks allow water to settle at the bottom for a period of time to allow any remaining solids to settle as sludge. Scum can then be skimmed off the wastewater if grease or oil rises to the top.
Secondary – This stage of water treatment involves using biological methods to remove any remaining organic compounds. Certain applications, such as irrigation, can be performed with effluent that has been treated to a secondary standard. Human consumption of water will, however, require a final treatment stage.
Tertiary – water is disinfected at this stage in the wastewater treatment process so that it can be used as drinking water. Disinfection of water involves a variety of techniques, including:
- UV disinfection – UV lamps emit light that destroys bacteria’s DNA.
- Chemical processes – microorganisms can be destroyed using chemicals such as chlorine.
Water treatment plants in Coimbatore achieve water quality standards in accordance with water safety regulations. Our drinking water is safe and clean as a result of this continuous process.
