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  1. waterexpert

    Need to purify fumes produced by a plant

    Whilst being unfamiliar with both the varnish and thinner you are using, this seems to be a Volatile Organic Carbon control problem. There are quite a few options. A good book to get you started is this one http://www.amazon.com/Odor-Control-Handbook-Harold-Rafson/dp/0070525234
  2. waterexpert

    Coliforms in Groundwater supply

    This is why I clarified what I was talking about in my previous post, as confusion seems to have arisen. I was replying to the person who suggested "shocking the well by injecting chlorine into the aquifer", rather than you, Bimr. This is why I said "the NI Environment Agency will get very...
  3. waterexpert

    Piping Materials for Digester Gas Systems

    Hi Kylie, have you considered plastics for the small bore stuff? Regards Seán www.expertise-limited.couk
  4. waterexpert

    Why U-PVC pipes are not recommended for distributing potable water?

    PVC has been targeted by environmental campaign groups like Greenpeace, using propaganda techniques- put "poison plastic" into Google to see what I mean. The overwhelming majority of these claims are either groundless or outdated, based on risks which no longer exist. Despite this, the...
  5. waterexpert

    Coliforms in Groundwater supply

    Just to be clear, I am saying that putting chlorinated water into any aquifer, whether that be groundwater or surface will be frowned upon. I have been engaged for eight years to give advice on these matters by the UK government, but things do change, so I have spoken to the NIEA this morning...
  6. waterexpert

    Coliforms in Groundwater supply

    Hi Pearse, I think you will find that the NI Environment Agency will get very upset if you start putting chlorine into their aquifers. It might be different overseas, but in the UK this is highly unlikely to be allowed. Putting anything into the water environment is very tightly regulated...
  7. waterexpert

    Flowrate throught butterfly valves

    I'm not sure I'm understanding the question, but Cv is used to calculate flow. It gives the relationship between flow and pressure drop. Flow is proportional to absolute inlet pressure. Hence if you know inlet pressure and valve rotation angle, the Cv figures you have can be used to calculate...
  8. waterexpert

    Aeration piping for raw wastewater lagoon

    Thin-walled low-grade stainless often saves on installation and maintenance costs so as to be cost competitive for above-water pipework. It's quite extensively used in the UK, teamed with uPVC for the permanently submerged sections. Regards Seán www.wastewatertreatmentplantdesign.co.uk
  9. waterexpert

    Can anyone help with this nozzle picture?

    Nozzles like this are made by a company called Cadar http://www.cadar.ltd.uk/ here in the UK. They will have been bought in by the vessel manufacturer from such an OEM supplier. They will sell you spares, but there will be a markup of course. Regards Sean www.expertise-limited.co.uk
  10. waterexpert

    Can anyone help with this nozzle picture?

    Nozzles like this are made by a company called Cadar http://www.cadar.ltd.uk/ here in the UK. They will have been bought in by the vessel manufacturer from such an OEM supplier. They will sell you spares, but there will be a markup of course.
  11. waterexpert

    materials for water lines

    Hi Ferex, there are a number of factors: 1. Selection of materials suitable for the chemical composition, pressure and temperature of the contents. Perry's has useful tables for materials selection by these criteria, as do various pipe manufacturers. 2. Industry standards. For essentially...
  12. waterexpert

    need help here...

    I have a manual on water feature design on my website here: http://www.expertise-limited.co.uk/water%20feature%20design%20manual.htm Regards Seán www.expertise-limited.co.uk
  13. waterexpert

    Static Mixer (Sulzer or Kenics)

    What has not been remarked on by other posters is that the Chemineer HEV has superior performance against blockages, as the mixing elements are secured to the walls of the pipe, leaving a clear void down the centre. Regards Sean www.seanmoran.co.uk
  14. waterexpert

    Process Flow Diagrams

    With respect, if you don't know, wouldn't it be better and simpler to have them done by someone who does? Seán www.seanmoran.co.uk
  15. waterexpert

    how to design BAF?

    You'd be unwise to try to design you own from scratch, in all likelihood. Probably better to go to one of the proprietary manufacturers, though BAF's a bit old hat now, and you can get a similar process footprint from deep activated sludge tanks. There are a number of potential design problems...
  16. waterexpert

    Rotating Biological Contactors submerged in activated sludge

    Some think that the attached growth on the discs is more resistant to short-lived shock loadings. Seán www.seanmoran.co.uk
  17. waterexpert

    gaining chartership

    The IChemE do salary survey every year, which makes clear the difference in earnings of Chartered and non-Chartered Engineers. I seem to remember it includes other disciplines as well as Chemicals. Of course all we Chemical Engineers have to do to get chartered is not die for five years after...
  18. waterexpert

    need a pressure drop on discharge side of pump

    Have you considered fitting a Variable Speed (Inverter) Drive? This can reduce pump output in a power-efficient way. Regards Seán http://www.expertise-limited.co.uk/
  19. waterexpert

    Guarantee of Payments

    All of the above sounds sensible, but I personally only get payment in advance if it is an overseas client or a private individual, but then it's 100% in advance. I just do a credit check to weed out those who don't have the money. I can do this because the UK courts make it cheap and easy to...
  20. waterexpert

    water combiner

    I think what you need is a static mixer- see http://www.chemineer.com/kenics_products.php for example. Regards Sean www.expertise-limited.co.uk

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