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Water treatment plant balance

Water Treatment Plant Capacity Calculation

In this post, I want to share you how to calculate water treatment plant capacity. I used this term to avoid misunderstanding.

  • Raw water is untreated water coming from water source, such as from wellwater, river, or seawater
  • Utility water is raw water which has been treated and used in plant, such as for personal hygiene (flushing), utility station, cooling tower make up
  • Potable water is sufficiently high quality water which is provided for drinking, cooking, laundry, and safety shower/eye wash
  • Demineralized water is treated water which is usually used as chemical dilution of MDEA or boiler feed water

Water treatment plant capacity calculation begins with demin water demand, potable water demand, utility water demand, and the last is raw water demand. (more…)

Why do we need to make complete technical bid tabulation, requisition, or data sheet?

Now I undestand. People said experience is the best teacher. I think that’s true.

I have already follow procurement of several equipment package since the beginning. I compared my preparation and others (especially preparation of engineers from our head company). My preparation was way way incomplete. I felt the effect right now.

One of my colleague asked me if the internal of pressure vessel in water treatment plant will be spark tested or not. The purpose of spark testing is to determine if there are leaks in the rubber lining and identify the locations. It is a mandatory test in rubber lining tanks.

So, what is the problem? The problem is, for any reason, the appointed vendor cannot perform the test. They just give us the guarantee that there will be no leaks in the lining.

I have googled and found that some vendors perform pre- and post-cure inspection for rubber linings. I got to understand that the test was very important.

Back to the topic. I wish I could turn back time and wrote on my technical bid tabulation and requisition, and data sheet about the point. I did not have spend time to focus in such details. That’s something which is not our concern at the beginning and at the last it became a problem.

Lesson learnt: be detail in making technical bid tabulation. Consider many factors. Ask your colleague or somone who has more experience than you. 

More about Water Treatment Plant: Methods to Remove Taste and Odor

Last week and today I met some Water Treatment Plant vendors to discuss about technical clarification. Some engineers and my boss have discussed the possibility to reduce the money to purchase water treatment package and make the system more simple. The main purpose the technical clarification meeting was to inform vendors what we want in our Water Treatment Plant, to ensure that is possible, and to ask for quotation, of course.

My boss is a very intelligent chemical engineer therefore I learn much about Water Treatment Plant from him. The vendors also told us about technical consideration in their water treatment plant configuration so that we understand a bit the reason behind their configuration selection. Of course we want to choose vendor who can offer best price and acceptable water quality (mainly for boiler feed water). (more…)

Water Treatment Plant: Typical Configuration and Processes

Since May 2012, I have been involving in an EPC (Engineering, Procurement, and Construction) project. In my opinion, it is a big project because the core business of my company are (but not limited) feasibility study, plant assessment, turn around, plant re-activation, etc.

The first job I need to perform was to create Piping and Instrumentation Diagram of Water Treatment Plant. It was quite challenging task because this is the first time I deal with P&ID and also the first time I deal with Water Treatment Plant. (more…)