Why Uthingo?

MOTIVATION FOR CHOOSING THE UTHINGO SEWAGE PLANTS

RAS/SAM modular plants:

- Our plants are small and modular. We install them as and when needed. Therefore the developer’s budget is not tied up on a massive and costly plant from day one. The plants are only erected when their cash flow/sales make it reasonable; giving the developer financial ADAPTABILITY

- Our plants are small and unobtrusive, allows for great flexibility in their placement, does not interfere greatly with other elements in the developmental plan

- Our plants are underground. Does not spoil the view. The area above the plants can be used; as parking lots, lawns, tennis courts, volleyball courts etc. The area is not lost, but can be utilised for many functions.

- This gives the developer the opportunity to, as it were, use the same piece of ground twice. and at the price of ground this is a great financial benefit.

Civil cost are MUCH lower:
On our system we use small bore pipes (110 mm) over short distances, usually able to utilise gravity. Pipes can therefore usually be laid fairly close to the surface, small invert depths, shallow trenches. The reticulation is SIMPLE & STRAIGHT FORWARD.

Using large centralised plants would require big bore pipes over long distances. These long distances invariably lead to deeper (more expensive!) trenches.

Large plants are by their nature above ground and unsightly. They are therefore always placed as far away as possible from everything else, just adding to the reticulation complexity and costs! Also adds to the problem of “where to place the sewage plant”

The developers save on time and money: simpler reticulation means less civils and smaller pipes, no pump stations, shorter distances and also shallower and smaller trenches, added to the greater freedom in the placement

- Modular plants are simpler to operate, more-or-less self-managing due to gravity flow through the plant. No expert full time operators are needed. Saving on labour costs.

- Smaller plants mean lower power usage. On our system the blower is the highest rated component, only 5,5 Kw. On big centralised plants stirrers, pumps and aerators are used with substantially higher ratings. Using our system means simpler, smaller and safer power distribution networks.

- Using a number of smaller plants means that if some piece of equipment does eventually fail, it is only a fraction of the total sewage flow that is affected, not the entire flow.

- Because all pieces of equipment are so much smaller it also means that the replacement of the failed component is simpler and should be done from locally held spares. 

- Compared to aerators of big plants our blowers are very inexpensive. Furthermore as we standardise on the blowers used one held as a spare represents a very small financial outlay. (For a big plant it is out of the question to hold a spare aerator in stock. When one is needed it would have to be ordered from the original supplier. Delivery and installation would be time consuming, no sewage treatment taking place during the “down” period!


Mr Reenen De Kock


B Sc (Agric) Biochemistry & Chemistry
Department of Biochemistry & Chemistry
University of Pretoria

Post Grad Capita Select
Department of Chemical Engineering
University of the Witwatersrand

M Sc (Agric) Biochemistry
Department of Biochemistry
University of Pretoria

AMP
School of Business
University of the Witwatersrand

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