Noone seems to have picked up the word I read in the original post: "...new piping WITHIN an existing potable water reservoir". BOTH SURFACES of the pipe are going to be exposed to the product and therefore the external treatment must be suitable for immersion in drinking water, just as the...
Addendum to my earlier response - the one you mention is for Water treatment sludge. There is a sewage sludge version (actually the original I believe) which was described a few years earlier in TR 185 (I think). As previously, ref their web site for details.
I can't resist saying:
You'll find the information you are looking for in WRc publication TR189.
Less facetiously:
It was updated in June 1997 to TT016
WRc ref TT016/09283-0
Any copying etc would breach copywrite, so I suggest you get on their web site and order a copy.
Your description completely changes the image I had previously of your installation, as you never mentioned aeration, bag filters or the fact that you are discharging to nature. But hell, who needs facts? Your plans to soften should have given me a clue! Are there any other minor details...
Look in the discussion elsewhere in this Forum: "Concrete pad for tanks" or something like that. You can recognise it because it has 63 replies - all asking for a copy of the reference that I guess will answer your question. there is mention of seismic design too.
Good luck.
My first reaction on reading your post was a slight to medium raising of the hairs on the back of my kneck . If this is a typical ground water plant, you will be filtering directly on line using pressure filters and your wording implies breaking up the concreted filter bed by hand.
With one...
Bbird,
Thanks for your better details.
I think we all seem to share a similar philosophy.
I started to declare a political view at this stage, but that is not what this website is for. What it does serve, though, is to point out yet again that particular engineering is only part of the...
I am outside the power industry, but reading the news recently I have noted a couple of interesting points:
Italy seems to import all its power (ie no domestic capacity worth mentioning) If it works most of the time, then transmission must be good.
London imports all its power (ie NO domestic...
You could also try "Rotating Biological Contactor" which is the technology that is partially submerged. It differs from the random packing referred to by others in that the hard surface that the bacteria grow on is rolled over and over on a shaft to expose the biofilm alternately to...
I have a rule of thumb, that works in metric I'm afraid. But applying it to your case, I would say you have your gradient too low.
I never design gravity sewerage with a gradient of less than the reciprocal of the diameter. Thus, if I were designing your pipe, it would not be flatter than...
A rather late contribution, but it may be helpful to someone. It will be interesting to see the specialists' reaction to a simple civil engineer's opinion.
Don't forget the option of mechanical variation. They can be supplied to set up manually, or can have a little servo to provide logic...
Confined spaces are the subject of a very interesting thread in the water and distribution forum. Everybody reading these notes should be aware of that discussion, and the fact that it was started by consideration of the circumstances that led to a fatality. Don't underestimate confined spaces...
Yigo,
As a civil engineer who has the temerity to estimate electrical things from time to time, I would advise you to be much more general in your approach.
Don't kid yourself that you are getting a better answer by guessing the components and then multiplying them out. I would suggest you...
Bbird,
Sorry - I obviously wasn't clear in my earlier comment.
If you were using 3000 diameter pipes (for instance), you might think about having one third at 2800 mm diam, one third at 3100 mm dia and one third at 3400 mm dia so that net pumping head didn't increase (I can't do the sums...
