The alkalinity or acidity of a substance is determined by its pH. Water has a pH of 7, which is considered neutral. Anything with a pH over 7 is alkaline, and anything with a pH below 7 is acidic.
In order to bring the measured pH of a liquid into a specified range, pH control involves adding an alkaline or acidic material to the liquid. For instance, the pH range of wastewater released from commercial or industrial locations, is regulated by the majority of water authority regulators. For instance, pH discharge limits are often required to be between 6 and 10 by trade waste regulators.
What is pH control in Effluent Treatment Plants?
A pH controller includes a probe to determine the substance's current pH, chemicals to adjust the pH through an injection pump, and a controller to determine the necessary injection rate and turn on the injection system.
Different pH control systems
In-line pH control involves inserting a probe into a tank containing the solution, or a pipe through which the solution is flowing to measure the pH. The controller then uses a link in the pipe to add chemicals directly to the solution.
Recirculating pH control involves pumping a solution out of a tank and into a measurement instrument, then pumping it back in. The stream is cleaned, the probe measures it, and chemicals are added to its return path.
This approach offers a lower risk of damaging sensitive probes, because it examines water that is already in circulation, which increases the reading's accuracy.
When does ETP apply pH control?
A system for measuring and treating effluent water before it is discharged, is typically present in every commercial or industrial operation, where wastewater is created. One of the requirements that must be followed is pH.
Effluent is subject to stringent rules and requirements set by the government, and infractions can result in penalties, legal action, and environmental harm.
The size and complexity of the treatment systems might vary depending on how much waste water is produced. Depending on the accuracy needed and the quantity of injection chemicals needed, the right system must be created and chosen.
The pH of the effluent water can also affect how well other pollutants are removed from the water.
Let’s understand with an example:
For instance, water treatment facilities that remove suspended particulates, from water use pH correction. In order for coagulants, chemicals that clump together small particle solids that would otherwise pass through mechanical filtration, to work effectively bring particle solids in suspension together, and permit efficient removal from water, pH levels must be corrected to a particular range.
In some process activities, pH might be a crucial parameter to control in addition to effluent water management. For instance, fermentation often takes place at a pH range that is acidic. The pH of drinking water must be kept between 6.5 and 8.5.
For the water in public swimming pools to be safe for swimmers, the pH must be controlled. In order to avoid skin irritation, a pH level close to 7.4 is optimal. Additionally, the water may turn hazy and appear dirty if the pH is too high. Therefore, pH regulation is important in many different fields and applications.
What do we offer?
Since, effluent composition varies, specialized wastewater management is required. Every project is different, and our experts at Netsol Water will assist you in selecting the most effective technique, such as an effluent treatment plant for treating effluent in the best way.
Netsol combines cutting-edge technology with years of experience, to handle the most challenging water treatment or wastewater treatment requirements of a wide range of clients, including small enterprises, corporations, and regional government agencies.