CSG: Putting a Good Spin on Wastewater

Posted on www.csg.co.uk/blog on July 3rd 2017

http://www.csg.co.uk/blog/putting-a-good-spin-on-wastewater/

Centrifugal force is one of the more entertaining laws of physics. Many of us have swung a bucket of water around our heads (hopefully, without spilling any) in an attempt to impress small children – indeed you may even remember it being demonstrated to you when you were young. Later on, you may have been amazed to watch the ‘wall of death’ motorcycle stunt in which a rider emerges unscathed after riding a motorbike around the vertical wall of a circular pit.

For die-hard devotees, there’s even a fairground ride, the fearsome ‘Hearts & Diamonds’, where brave souls stand unharnessed in a giant circular cage, to be whizzed around such that the entire cage can be rotated to almost 90 degrees. The sight of 50 or so screaming people seemingly stuck to the walls of an oversized washing machine drum is something that tends to live long in the memory, acting as a firm inspiration either to ‘definitely’ or ‘never’ try it for yourself. Either way, most people would agree that watching it is more fun than your average physics lesson.

When it’s not thrilling funfair riders on a Saturday night, centrifugal force has a day job – and it’s one that we really couldn’t do without: separating solid matter from water. Many industries use large quantities of water to carry out a number of processes, whether it’s washing potatoes or to apply a glossy coating to some types of paper. Having completed its process, the watery substance can’t simply be flushed away. It needs to have the solids removed – which has the secondary benefit that the water is left in a re-usable state.

How do you reliably remove potato earth or kaolin paper gloss (or a multitude of other substances) once it’s been mixed with water? You’ve guessed it – a centrifuge, albeit quite a specific type, much more sophisticated than the ‘washing machine drum’ you might initially imagine.

With such a significant demand and in so many places, it’s no surprise that there’s a need for a fleet of the things, with different capabilities and all able to visit your site in order to do their thing. In recent years, CSG have developed their oil-based expertise and have become a leading exponent of cleansing and clarifying fluids in the water-based world.

CSG’s selection of mobile centrifuges are available for hire, lease or even purchase. They can take upto 98% of the solid matter out of its watery suspension, which as a minimum, leads to its more efficient disposal or, in some cases, enables the only way to dispose legally.

With throughput rates of 20,000 litres up to 60,000 litres per hour achievable with some machines, they can guzzle through some serious quantities of sludge – and very often, they need to, as some customers require entire lagoons to be cleaned. Lagoon-clearance is a significant undertaking that may even require a roving dredger or a floating pontoon to literally suck the matter from the lagoon floor and pump it to the centrifuge at the waterside to separate it from the water.

With so many different kinds of application, surely there are limits to the types of location that such sensitive machinery can be taken to. Not so, says Pete Smith, CSG’s Technical Sales expert:

“Many of our most remote locations are at drinking water treatment sites, which can only be reached down quite winding lanes. Our biggest machines are transported on 30-foot trailers so if the lanes are too narrow or if there isn’t room to turn the vehicle around, we can send smaller systems, which will fit in the back of a van.”

The equipment is designed well enough that it can be operated with minimal training, although an experienced CSG operator is an optional extra to whoever wishes to hire it. Pete is keen to point out that ‘cleaning’ water does not make it potable, suitable for drinking, merely clean enough to be regarded as re-usable or fit for discharge.

Whatever the type of customer, their application and whatever the specific type of solid matter, CSG seem to have a centrifuge and a method for the job. While techniques can change significantly if the matter is coarser (grains of sand or grit) or finer (dissolved powders), the primary principle is always the power of separation afforded by centrifugal force, perhaps also the most environmentally-friendly law of physics.

Diaries of a Texan Traveller – pt. 4

A verbatim record of a diary I wrote while visiting friends (Paul & Rice) in Austin, Texas during the Easter holidays of my second year at University in 1994.  Re-blogged on the anniversary of each entry.  2017 Commentary, where necessary for context, added as footnotes in italics.

Tuesday 22nd March 1994,  11:15 (CST)

LYING ON THE FLOOR IN FRONT OF THE TV, AUSTIN, TX

I didn’t have time to write yesterday because I was up early and went on campus with Rice.  I went to Physics lectures , walked around campus, went with Rice to check his email (nothing from Matt!!).  In the afternoon, I decided to have a look at this stadium of the University’s.  It was no secret that Texas University has a 75,000 seater stadium; I’d seen it on Paul’s prospectus last year.  I’d also heard about it at Christmas from Paul & Rice.  I’d seen it from the plane when we came in to land and it wasn’t exactly anonymous by the time I’d got to campus.  It’s about 5 minutes’ walk from the Physics building (where I’d left Rice to enjoy his fourth lecture).  The main stand is absolutely enormous, towering above campus along with such structures as the main admin building and only one or two others (one’s called ‘Dobie’ and is their equivalent of Bowland Tower, said Rice).  Anyway, I walked up 10 of the 11 levels of the *bottom* part of the main stand and couldn’t get any farther.  Undaunted, I walked around the other side of the stadium and got in.  I sat on the back row, facing the main stand, exactly on the 50-yard line.  The twist is this: the main stand is so huge, it gives a 75,000 capacity…   …and yet it is only 3-sided!  I sat there in awe for about 20 minutes, trying to take in a stadium the size of Wembley, built exclusively for the use of students!

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The West Stand of the Texas Memorial Stadium (now the Darrell K Royal Stadium) dominates the skyline around the University.  In 1994, the stadium had three sides and a capacity of over 75,000.  Today, the capacity is over 100,000.  Photo: Daniel Drier

No matter how often you visit America and think you’re prepared for any excess it can throw at you, you’re never quite immune.  I’ve now seen Cape Canaveral, the World Trade Center, Denver’s doomed Stapleton Airport* and DisneyWorld.  Surely I am beyond such schoolboy wide-eyedness.  I am the last person to be shocked by the American capacity to get something so ridiculously right, and yet, even through all my experiences and knowledge of the American Way, when it’s there in front of you (or if you’re sat in it), its compulsion to amaze is irresistible and the inevitable symptom is that annoying British trait of staring like tramps at the feast; a combination of the innate comparison with home and the knowledge that, try as we might, there can be no way we in Britain will equal this.

Anyway, I’m not going to write any more on that stadium — so it’s impressive but just because I’m British, doesn’t mean I have to look like a dumbstruck tourist!

We went to watch ‘Wayne’s World 2’ again last night but there was an unfortunate side-effect: I wanted my guitar by the end of it and I also realised I left my amp in Lancaster…   …oh well, writing about it isn’t going to bring it all here!

I’m starving now.

[having eaten, later]

Paul & Rice have gone only campus — I decided to stay here because I’ve got a few things to do.

It’s 1:15, 7:15 at home — I’ll ring today.

I’ve just been flicking round the channels: MTV, Prime English Soccer, the evangelical channels and of course, not forgetting the, shall we say, liberated attitude to advertising.  Anyway, I’ll resist the draw of the soap-box for another time…   …but it would suffice to neatly contrast the phenomenal ability of this country to impress with its attitude to exhibit, against its phenomenally sad unimpressive class of inhabitant.

* At a time when arguments and protests about a second runway at Manchester Airport had raged on for years, Denver, having outgrown its own airport, Stapleton International, simply demolished it and built a whole new airport (Denver International Airport) on an entirely different site.