EFFICIENCY OF INDIVUDAL STAGES OF WTP

[Bijay gorain]

So I have read many threads here and I understand that there are many variables in the various stages of the water treatment plants. I also understand that the best way to guess the outcome of WTP is to do a pilot.
However, when it is impossible to do a pilot project how do guess the efficiency of the individual components of WTP also how do you decide which treatment is provided and which doesn't need to?

I'll elaborate on my question. let's assume, I know my ground water sample has high iron content.
my question is
1. how do you know exactly if you need only aeration and filtration or do you also need sedimentation or any other process? At what value of iron you include more stages? which document do you refer to for those values?

2. How do you know the efficiency of individual stages? How can I know for sure that for moderately tribute water, the convention WTP is good enough?

Basically, what I am asking is that without a pilot project how do you know what kind of WTP you need for a given water sample? I have looked through many books which describe in detail the individual process but non discuss the selection of these processes.

 

[1503-44]

First, you need an accurate water analysis. High in iron isn't going to do it.

Secondly, it sounds you are way over your head, certainly above mine, so I would suggest this is the time to hire a water treatment engineering design company to get anything serious accomplished by the end of the year.

 

[bimr]

As 1503-44 stated, the first step is to procure a complete water analysis. If you don't know what the parameter are, just ask.

Other things you need to know:

1. End user water quality requirements.

2. Capacity.

3. Method of treatment residual disposal.

4. Climate.

There are enough water treatment schemes that a pilot plant to study iron removal is not necessary. Text books and information from vendors should be able to supply the treatment efficiency.

 

[Bijay gorain]

Hi 1503-44,
High iron content was an example only. what I am asking is how do you choose the treatment stages.

I am a practitioner Environmental Engineer. I have been involved mostly in Water Distribution Network Design for many years now. I do have a decent knowledge of the design and construction of WTPs of various scales. you can say I have some gaps in my knowledge.

If anyone feels the answer is too broad to cover here, I request you to at least refer me to some books or guidelines. I have gone through many books and country manuals. The only place I find something close to what I am looking for is the CPHEEO manual from India and even that is quite vague. I am sure that members of this forum are much more knowledgeable and can guide me through this.

 

[Bijay gorain]

Hi Bimr,
Thank you too for your response.

I understand you are saying that this is a vast topic. I accept that.
Even though there are enough water treatment plants, there is no book or research paper showing a logical algorithm for choosing the treatment process.

Many a time you will find vague sentences such as if the sample is "high" on this then you do this but they don't say what is a high value.

 

[1503-44]

There are times when you can DIY and there are times that you can't. You have to gage the gap width.
That's how most of us specialists stay in business. Nobody is an expert in everything these days. Sorry, but since thats not my speciality, that's about all I can say. Maybe somebody else can help.

???
This expert recommends

https://www.environmental-expert.com/water-wastewater/water-treatment/books

 

[Bijay gorain]

this screenshot from water and wastewater engineering by mackenzie davis describes nicely what i am trying to say

 

[bimr]

The best book is probably Nordell's. It should get you started.

Link

Not much new in water treatment since that book was published except for the invention of the membrane processes.