The Process engineering for water treatment involves applying scientific principles to convert raw or wastewater into usable forms, like clean water or energy. This field encompasses the design, operation, control, modelling, optimization, and intensification of processes used in water and wastewater treatment. These processes can be implemented at various scales, from laboratories to large-scale industrial facilities. 

Key Aspects of Water Treatment Process Engineering:

·       Chemical Processes:

Chemicals are often added to the water to aid in removing impurities. For example, coagulants are used to clump together small particles for easier removal during sedimentation. 

·       Physical Processes:

Physical methods like membrane filtration and adsorption are used to separate contaminants from the water. 

·       Biological Processes:

Biological processes, like activated sludge, are employed to treat wastewater by utilizing microorganisms to break down organic matter. 

·       Treatment Steps:

A typical wastewater treatment process might involve screening, grit removal, primary settling, aeration/activated sludge, secondary settling, filtration, and disinfection. 

·       Process Optimization:

Process engineers focus on optimizing treatment processes to achieve the desired water quality while minimizing energy consumption and costs. 

·       Modelling and Simulation:

Mathematical models and simulations are used to predict and improve the performance of treatment processes. 

·       Unit Operations:

Water treatment relies on a series of unit operations, including screening, coagulation, flocculation, sedimentation, filtration, and disinfection. 

·       Industrial Applications:

Process engineering principles are applied to treat industrial wastewater, ensuring compliance with environmental regulations and enabling water reuse. 

·       Continuous Disinfection:

In some applications, like swimming pools, continuous disinfection using methods like chlorine dioxide or salt can be implemented. 

Key Process Engineering Codes & Standards

1. General Process Design & Piping

2. Water & Wastewater Treatment-Specific Standards

3. Safety & Instrumentation Codes

4. Drawing and Documentation Standards