Simplified SBR wastewater treatment plant design

1
Simplified SBR wastewater treatment plant design

• Final Project of CAE Tools
• By Jinghua Xiao

2
Contents

• Project Goal
• Who are the Users
• User Interface
• Employed Software
• Assumption
• How to Implement
• The Implement

3
Project Goal

• develop an implement to design a WWTP with a
  simplified SBR treatment process (including
  preliminary treatment, SBR treatment and
  disinfection) only.
• An extension of assignment 6
• Users just need to input some basic
  information, the design will come out.

4
Who are the Users

• Engineering students who are learning how to
  design SBR WWTP

5
User Interface

• The implement should include five parts
• WWTP Design Work information
• User Instruction
• Data Input
• Do Calculation (always hidden)
• Design Report (hidden before report)

6
Employed Software

• Requirement
• do calculation (spreadsheet, Mathcad, Matlab, VB,
  database, etc)
• get data from spreadsheet (database, VB,
  spreadsheet, etc)
• make a user interface to input data and make some
  controls (VB, spreadsheet)
• explain the meaning of each parameters
  (spreadsheet )
• store and report data (Database, spreadsheet)

7
Assumption

• The wastewater volume is not very big, so that
  the simplified SBR process is feasible and
  economical.

8
How to Implement

• Treatment Capability Design
• Based on the Assignment 6 ? average Q (m3/d)
• Qavg ? Qmax, Qpeak (m3/d)

9
How to Implement -- Continued

• Step 1, Grit Removal Design
• Peak flow design ? parameters V(m3), length(m),
  width(m), height(m), retention time(min)

10
How to Implement -- Continued

• Step 2, Bar Screen Design
• Two screens are implied coarse screen (6-20mm,
  remove 60 SS) and the fine screen (2.3-6mm,
  design to remove 25 SS)
• Peak flow design ? Design Factors (width,
  length, depth, spacing, velocity, angle and type)
  

11
How to Implement -- Continued

• CSTR Tanks Design

Two Tanks?work alternatively Filling ? Reacting
? Settling ? Decanting ? Idle Parameters V, H,
L, W T1, T2, T3, T4, T5, period,
12
How to Implement -- Continued

• Activated Sludge Design
• F/M Design, mass ratio of food/microbes 0.050.1
• Parameters Yield rate, waste sludge (volume,
  discharge period), sludge disposal method
• Aerate
• Oxygen needed to oxidize BOD NH3-N
• Parameters Volume/hr, oxygen transfer efficient
• Disinfect
• Adopt ultraviolet to disinfect
• Based on the number of fecal coli form
• Parameters hydraulic retention time, volume,
  length

13
How to Implement -- Continued

• User Input

14
The Implement

• Link to the implement, design.xlt
• Link to the test file, design test.xls

15
Thank you!