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Water and Waste Water Treatment Design

Water and Waste Water Treatment Design

Water and Waste Water Treatment Design

(OP)
Hello,

For my 4th year Water Engineering coursework I have been asked to design a water waste treatment plant for the area of my choice.

I have chosen to design a traditional wastewater treatment system for a region within a city (pop. ~40,000) that requires sludge treatment and disposal.


I have the book "Wastewater treatment concepts and design approach" and have been trying to work through that, however the only information I have been given for the project is the BOD5 and SS levels over 24 hours. Its my understanding that I need to obtain the actual water flow for the plant but I'm unsure how to do this.

Any advice on how to do this (or relevant advice for the rest of the system) would be much appreciated.

Thanks in advance,

Kyle.




interval    BOD5 (g/m3)    TSS (g/m3)
12-2    144    155
2-4    109    127
4-6    96    99
6-8    129    149
8-10    205    229
10-12    255    295
12-2    240    264
2-4    219    242
4-6    217    236
6-8    248    279
8-10    278    310
10-12    192    211
        
        
BOD5 (max)    278    
TSS (max)    310    
 

RE: Water and Waste Water Treatment Design

Get a copy of Fair & Geyer's textbook.

Water and wastewater engineering

RE: Water and Waste Water Treatment Design

I suggest if there is an engineering consultant near you that you go there and ask to use their library or pseak to an engineer. Most engineers are very obliging and will enocourage such vision.

I assume you are in the USA so consultants such as Metcalfe & Eddy, CH2mhILL, Seimens may be the trick. If not try your local public authority as they are likely to have a library.

If not in the USA where are you?

By the way this forum is not meant for students but what the hell its easier to get forgiveness than permission. Go for it!

"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.

http://waterhammer.hopout.com.au/

RE: Water and Waste Water Treatment Design

You have to assume a diurnal flow pattern as well as a per capita wastewater volume.

Multiply the hourly diurnal flows times the diurnal BOD/TSS values and then develop the average daily BOD/TSS values. That will give you average BOD/TSS values which can be used to design your wastewater treatment plant.

Fair & Geyer's textbook has these calculations.

RE: Water and Waste Water Treatment Design

(OP)
I've finished the project now thanks, was alot more involved in the design than one would have imagined!

RE: Water and Waste Water Treatment Design

Hi guys,

what are the other methods for designing overflow pipes for a existing septage tank who has .017MGD? I have used water distribution model and autoCad. what are the main concerns?

RE: Water and Waste Water Treatment Design

3pg + I +e where p is population equivalent g is water use per head I is infiltration (ground water leaking into old sewers) and e is industrial input. Typical values for each can be found on the web. diurnal flow typically varies 1.5 to 1.8 times the value over the day. Night time 3 am being 1.8 times lower flow than say 9 am peak flow.
 

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