design calculations

[bargin]

I am currently designing a water treatment plant which consists of several independant processes. Prefiltration using an 80 micron automatic backwash prefilter; pH adjustment system; ozonation system and associated injection system; carbon filtration and chlorination. I had a tendancy to rely on suppliers info in the past and trust them. However, I have checked out several components and design criteria within the system and it dont add up. So I have started performing my own calculations. For example, for pH adjustment we will be using hydrated lime, based on my water flow design how do I determine the amount of chemical needed?

Ozonation calculations required as well. I have many known parameters for all processes, but I would other sample calculations as a comparison

 

[waterexpert]

I'm not sure whether any water treatment processes may be said to be truly independent. To calculate the dose rate, you will need information on the incoming water flow, pH, methyl orange alkalinity,temperature and so on. These can be used to determine required dose rates. The pH you are aiming for is probably based on the optimum for chlorination, but due regard should be given to other factors such as THM and chloramine formation, managanese precipitation and the like.

Seán

http://www.expertise-limited.co.uk