AdDesignS (Adsorption Design Software for Windows) is a specialized modeling tool developed to help engineers design and evaluate granular activated carbon (GAC) systems for removing contaminants especially PFAS (per- and polyfluoroalkyl substances)—from drinking water and wastewater.  

‍Here’s what makes AdDesignS valuable:
   •   Predicts Adsorption Performance. Uses mathematical models (like the Freundlich isotherm and surface diffusion coefficients) to simulate how contaminants interact with GAC media over time.
   •   Supports Pilot and Full-Scale Design. Helps utilities and engineers estimate how a treatment system will perform without needing extensive pilot testing.
   •   Optimizes System Parameters. Allows users to input variables like:
       ○ Type of GAC or Ion Exchange resin  
       ○ Empty bed contact time (EBCT)
       ○ Flow rate
       ○ Contaminant concentrations …to predict breakthrough curves and media exhaustion.
   •   Saves Time and Cost By modeling performance, AdDesignS can reduce the need for long, expensive pilot studies and large sample volumes.
   •   Compares Treatment Options Useful for evaluating different media types or system configurations before committing to full-scale implementation.