Wasda

WASDA

Why WASDA?

WASDA was developed as a DSS tool to assist engineers and regulators to make prompt decisions in wastewater treatment plant design. In addition, it could also guide users to estimate capital and operating cost for developing new membrane treatment. WASDA contained two main parts, which are
  • (a) knowledge or information base and
  • (b) design calculation spreadsheet.
It provided preliminary, primary, secondary, sludge and advanced treatment modules. WASDA gives various options of activated sludge systems, i.e.
  • (a) conventional activated sludge (complete-mix flow) system
  • (b) extended aeration system
  • (c) oxidation ditch system and
  • (d) sequencing batch reactor.

WASDA in brief

  • Contains 2 main parts
    • Knowledge/information base
    • Design calculation form
  • Design Advisor or knowledge-based forms
    • Design considerations and parameters
    • Process stages and flowchart
    • Process description
    • General calculation design
  • Provides conceptual and process design recommendations for conventional wastewater, primary, secondary and advanced treatments - proposed by best practical manuals / public authorities (sewerage services / environmental control).
  • Mainly focussed on municipal and industrial applications.

Key features

  • Relatively inexpensive to operate, compare with human experts
  • Gives more consistent, reproducible design output especially in various systems for wastewater treatment plants than human experts
  • Good tool since it can help to identify problems faster, examine various alternatives and make a choice
  • Can assist engineer to solve calculation design in a short time compared to manual calculation
  • Meet design specifications as required by appropriate authorities

Without WASDA

Without WASDA, design and process engineers and approval officers have to perform:
  • Manual calculations for preliminary, conceptual and detail designs
  • Develop their own spreadsheet calculation modules
  • Consult other consultants
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