For more than 20 years, DWG ASSOCIATES'
simulation software has been the only wastewater treatment plant
simulation software for the high-purity
oxygen (HPO) secondary treatment marketplace. DWG
ASSOCIATES has been developing HPO (sometimes also called oxygen activated sludge) treatment plant software since the
mid-1980s. And before that, members of our staff wrote the HPO
design software that has been (and still is) used to design virtually
every UNOX or OASES HPO secondary system in the entire world. Our
first plant simulators were used to provide a "hands-on" operating
experience for attendees at DWG ASSOCIATES' operators training courses
given in conjunction with the Georgia Institute of Technology in
Atlanta, Georgia, USA.
DWG ASSOCIATES not only understands HPO technology, we can model it, we can simulate it, and we can teach it. Our simulators are accurate, realistic, and specifically developed to mimic HPO wastewater treatment plants. Like all simulators, ours are used for plant design, plant troubleshooting, plant optimization, operator training, and for all manner of "what if" operating scenario analyses. We've got simulators for HPO aeration basins, PSA oxygen generation systems, and cryogenic oxygen generation systems. Our simulation capabilities allow us to analyze your secondary system without interrupting actual plant operations; oftentimes off site from a remote location.

HPODesign© is a personal computer-based high-purity oxygen wastewater treatment plant design simulator. DWG ASSOCIATES uses this simulator for design and/or plant evaluation purposes. HPODesign© (and its predecessor versions) has been used by various organizations to design every HPO plant in the world. For plant evaluation purposes, DWG ASSOCIATES' personnel can rapidly calibrate the software so that it mimics the operation of your (or any) operating facility. Once calibrated, our experts can work with your staff to optimize, troubleshoot, or upgrade your plant. With a calibrated simulator, our engineers are able to work with your staff either on your site or from remote locations, if that is necessary, to resolve operating or optimization problems/questions as they arise. That's as cost effective as it gets!

PSASim© is a PC-based process simulator that mimics the operation of 3-bed, Union Carbide-type Pressure Swing Adsorption (PSA) oxygen generators. PSASim© turns a personal computer into a functional model of a PSA oxygen generation plant typically found at an HPO wastewater treatment plant. The simulator assists with troubleshooting, evaluating, and optimizing operating PSA oxygen generators using either the old 5A or the relatively newer 13X molecular sieve. PSASim© is one of the tools DWG ASSOCIATES' personnel use during our "report card" plant analysis programs.

Like PSASim© and HPODesign©, CryoSim© is a computerized process simulator that replicates the operation of cryogenic oxygen generation plants. Specifically, CryoSim© replicates Union Carbide U-type and Air Products and Chemicals REVEX oxygen cryogenic plants, which are the two types of cryogenic plants typically found at HPO wastewater treatment plants. With CryoSim© running on a PC it's possible to determine the limitations (e.g., max. liquid oxygen making capabilities or turndown limit) and efficiencies of an operating plant without actually disrupting the operation of the physical plant. CryoSim© is another tool DWG ASSOCIATES' personnel use during our "report card" plant analysis programs.
Get our tri-fold simulation brochure . . .
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