Plan-it STOAT

Plan-It STOAT is an easy to use, Windows based, planning level software tool that is used to evaluate wastewater and water reclamation treatment process options. The software allows a user to prepare a preliminary hydraulic design so that plant pumping and elevation requirements can be established. Plan-It STOAT also quickly calculates unit process sizes (area and volume), chemical and power requirements, estimates annual and capital costs based on user supplied cost input, and generates output files that are compatible with other computer models. Given unit process sizes, the model quickly calculates effluent quality, using fundamental mathematical models. A plan-view functionality allows the user to investigate plant layout options.

Plan-It STOAT has three closely interrelated, operational modes:

Process Calculations (mass balance)

The first mode performs steady-state estimates of process performance given unit process sizes; or conversely, calculates preliminary unit process sizing given specific influent characteristics and desired effluent conditions. Taking into account all recycle loops, the software gives rapid calculations of mass and flow balances, which can be updated for a change in the design at the click of a button. The calculation engine incorporates a range of models from simple ‘rule-of-thumb' predictions to fundamental mathematical models, and gives powerful analytical tools such as sensitivity analysis and Monte Carlo simulations.

Hydraulic Calculations

The second mode allows the user to define the sequence of hydraulic elements in the liquid treatment train, from which Plan-It STOAT calculates a hydraulic grade line and liquid velocities in each element.

Site Plan (Footprint)

The third mode presents an interactive site plan worksheet. A user inputs an existing site plan or aerial photograph for use as a base, onto which Plan-It STOAT overlays proportionally sized geometric shapes, representing each treatment process. The user can move the processes on the site plan, to assess the fit of each design option, and interactively size the elements on the base, producing an iterative approach to the process sizing.

Reporting and Diagnostics

Plan-It STOAT incorporates detailed reporting and diagnostic functionality, to allow the user to report simulation results, pick out the most cost effective designs and diagnose potential problems with the design.

WRc/D&B, LLC., 8 Neshaminy Interplex, Suite 219, Trevose, PA 19053. Tel: 215-244-9972; Fax: 215-244-9977.