How To Make A Working Model On Waste Water Management?

Constructing a model on waste water
management can be a great help in maximizing efficiency and optimizing the
processes. A working model is an invaluable tool in understanding how a waste
water treatment plant will perform. There are a number of steps that should be
followed in the modeling process:

1. Deciding on the goals of the model - and if more than one goal is targeted
then prioritization of set goals.

• How do you imagine the model to
      work?
• What is it that is wanted to be
      found out? I.e. Process operation change, capacity assessment, retro fit
• Which of the unit processes are
      to be focused on?
• Of any problems found, what are
      encountered most often?
• Where is the vast majority of
      the allocated budget going?

2. Collation
of Information

• Operational parameters
• Physical dimensions of the Tank
• Piping
• Unit Interconnections

These are the bare minimum necessary
to be able to run a model

3. Preparation and Conduction of a Sampling Program (optional but highly
recommended)

This allows the engineer to become acquainted with plant personnel and how the
treatment plant operates:

• Obtain a site plan or diagram
      of the Plant
• Ensure the co-operation and
      understanding of Plant personnel
• Anticipate any variations in
      Plant performance, plan in advance and keep personnel informed
• Enquire about laboratory testing
      if deemed necessary
• Observe thoroughly the
      operation of the Plant, being sure to take written notes

4. Analysis
of Data

• Screen Data
• Mass Balances
• Design hand calculations

This is
fundamental in making sure the final results acquired are worthwhile
5. Model Calibration and Set Up

• Define each process unit in
      regards to chemical, physical and operational parameters
• Adjust model predictions until
      the information matches the Plant data performance

6. Verifying
the Model - This is checking the comparisons between independent sets of data
and the simulation results

7. Model Simulations such as

• Assessment of feasibility
• Loading conditions
• Analysis of Aeration
• Management of Solids
• Removal of Biological nutrients