Water and Waste Water Treatment Design

[mckyle9]

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

 

[bimr]

Get a copy of Fair & Geyer's textbook.

Water and wastewater engineering

 

[stanier]

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/

 

[osamahalihadi]

The most useful step by step design textbook is Waste water treatment plants design by Qasim R. Sayed.
see this link:

http://www.abebooks.com/servlet/SearchResults?an=Qasim+R.+Sayed&sts=t&x=0&y=0

 

[bimr]

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.

 

[mckyle9]

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

 

[drogones12]

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?

 

[ch81pc]

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.