Environmental Technologies Design Option Tool (ETDOT)
Modeling for contaminant removal from drinking and waste waters
The Environmental Technologies Design Option Tool (ETDOT) is a suite of software models that provides engineers with the capability to evaluate and design systems that use granular activated carbon or ion exchange resins for the removal of contaminants, including PFAS, from drinking water and wastewater.
ETDOT was developed by National Center for Clean Industrial and Treatment Technologies at Michigan Technological University (MTU). In 2019, EPA signed an agreement with MTU to make this suite of adsorption models available to the public at no cost.
Software included in ETDOT:
- Adsorption Design Software for Windows (AdDesignS) Version 1.0
- Advanced Oxidation Process Software (AdOx) Version 1.0.2
- Aeration System Analysis Program (ASAP) Version 1.0
- Biofilter Design Software Version 1.0.27
- Continuous Flow Pore Surface Diffusion Model for Modeling Powdered Activated Carbon
- Adsorption Version 1.0
- Dye Study Program (DyeStudy) Version 1.0.0
- Predictive Software for the Fate of Volatile Organics in Municipal Wastewater Treatment Plants (FaVOr) Version 1.0.11
- Ion Exchange Design Software (IonExDesign) Version 1.0.0
- Software to Estimate Physical Properties (StEPP) Version 1.0
The ETDOT models are Windows®-based programs that will work with all versions of Windows.
Even though carbon adsorption can be an effective treatment technology for removing organic compounds, such as PFAS, from water, it can be expensive or may not achieve desired removal objectives if improperly designed. Proper full-scale design of this adsorption process typically results from carefully controlled pilot-scale studies that are used to determine important design variables, such as the type of adsorbent, empty bed contact time, and bed configuration. However, these studies can be time consuming and expensive if they are not properly planned.
The information generated from the ETDOT models can be used to help design pilot treatment systems and provide a first-cut prediction of full-scale results. The information will also provide states and utilities with a better understanding of the fundamentals of carbon adsorption and what that means to the operation, performance, and costs associated with this technology.