Water and wastewater treatment involves a range of methods to make water sources safe for consumption or re-release into the environment. Water and wastewater treatment are essential for preserving human health and safeguarding the environment since untreated water may contain harmful bacteria, viruses, and chemicals that can cause disease and pollution.

The therapy process frequently involves a number of steps, including:

1. Coagulation and flocculation:

Coagulation involves combining a chemical with water, typically a metal salt like ferric chloride or aluminium sulphate. In the presence of negatively charged water pollutants like clay, silt, and other organic and inorganic elements, the substance produces coagulant, which are positively charged particles that pull and bind them.

The water is gently stirred after coagulation to promote the formation of larger particles known as flocs. The water is gently agitated during flocculation in a mixing tank to aid in the flocs’ expansion.

Following the coagulation and flocculation processes, the water is left to sit in a tank of sedimentation, where the larger flocs condense to create sludge at the tank’s bottom. After the sludge has been eliminated, the water is sent through a series of filters to remove any impurities that may still be present.

The coagulation and flocculation process, a vital step in the treatment of water and wastewater, removes pollutants and poisons that might have a negative impact on the environment and public health. The uniformity and effectiveness of water treatment can be improved by automating and optimising the coagulation and flocculation processes utilising control and monitoring systems like the MicroLogix 1400 PLC.

2. Sedimentation:

The MicroLogix 1400 PLC can be used in water and wastewater treatment facilities to monitor and manage the sedimentation process. Rockwell Automation MicroLogix 1400 PLC , which can be configured to do so, can assist in automating the sedimentation process. This will guarantee that the water is given the proper amount of time to sit, allowing the larger particles to settle to the tank’s bottom.

The PLC can be programmed to engage the sludge scraper when it’s time to clean the settled sludge after monitoring the sludge level in the sedimentation tank. By automating the sludge removal process, the PLC can help avoid sedimentation tank overflow and problems later in the treatment process.

In addition to controlling the sedimentation process, the MicroLogix 1400 PLC can also be used to track the water level in the sedimentation tank. To maintain the proper water level, the incoming water flow rate can be adjusted as necessary. The PLC can also be used to check the clarity of the clarified water as it leaves the sedimentation tank and adjust the treatment as necessary to ensure that the water satisfies the requisite quality standards.

3. Filtration:

The MicroLogix 1400 PLC can be used to monitor and control the filtration process in water and wastewater treatment facilities. Filtration is an important step in the treatment process because it removes any remaining impurities and toxins before the water is distributed or released.

The PLC can be set up to monitor the flow rate of the water through the filters and adjust the flow rate as necessary to ensure that the water is going through the filters at the correct rate. The PLC can also monitor the pressure and temperature of the water as it enters and exits the filters, and the filtering process can be altered as necessary to maintain the correct pressure and temperature levels.

The MicroLogix 1400 PLC can also automate the backwashing process, which entails rotating the water flow to remove any collected particles and dirt. The PLC can be configured to start the backwashing operation at the appropriate time and ensure that the process is successfully finished based on the flow rate, pressure, and other variables.

Read :- Allen Bradley 1766-L32BWAA MicroLogix 1400 PLC

4. Disinfection:

The MicroLogix 1400 PLC can be used in water and wastewater treatment facilities to control and monitor the disinfection process. An important step in the treatment process is disinfection, which gets rid of any remaining bacteria, viruses, and other dangerous germs from the water.

The PLC can be programmed to monitor the concentration of disinfectants in the water, such as chlorine, ozone, or UV light, and to adjust the dosage as required to maintain the levels. The PLC can also be used to monitor the water flow rate through the disinfection system and adjust the flow rate as necessary to ensure that the water is being appropriately treated.

Additionally, the MicroLogix 1400 PLC can monitor the UV lamps and chlorine feed systems for wear and tear and sound an alarm or alert when maintenance or repairs are necessary. By automating the disinfection process and keeping an eye on the equipment, the PLC may help to ensure that the water is appropriately treated and that the disinfection system is operating at its optimum.

5. Distribution:

The cleaned water is delivered to homes and businesses via a network of pipes.

Although there are additional processes, such as primary and secondary treatment, where organic matter and nutrients are removed from the wastewater, similar techniques are utilised in wastewater treatment.

Water and wastewater treatment is typically carried out at specialised treatment facilities using a variety of equipment and techniques. The efficiency, consistency, and dependability of the treatment processes can be increased through automation and process optimisation. Control and monitoring systems like the MicroLogix 1400 PLC are examples of such systems.

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• Source: https://usgreentechnology.com/how-water-and-wastewater-treatment-can-be-effected-by-the-micrologix-1400-plc/