Simplified SBR wastewater treatment plant design —— Final Project of CAE Tools
By Jinghua Xiao
Simplified SBR wastewater treatment plant design —— Final Project of CAE Tools
By Jinghua Xiao
Contents:
Project Goal
Who are the Users
User Interface
Employed Software
Assumption
How to Implement
The Implement
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.
Say why design WWTP and why use develop the implement
Who are the Users
Engineering students who are learning how to design SBR WWTP
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)
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)
Assumption
The wastewater volume is not very big, so that the simplified SBR process is feasible and economical.
How to Implement
Effluent Inflow Grit
Removal Disinfect tank Sludge Disposal
SBR tank Screening
Removal Treatment Capability Design
Based on the Assignment 6 average Q (m3/d)
Qavg Qmax, Qpeak (m3/d)
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)
Activated Sludge Design
F/M Design, mass ratio of food/microbes 0.05~0.1
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
How to Implement -- Continued
User Input:
The Implement
Link to the implement, design.xlt
Link to the test file, design test.xls
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