Today there are still large areas in the world where people have no access to clean and safe potable water, for instance in remote and underdeveloped areas.
But also in developing countries water supply is often a difficult task. In these countries cities are expanding at a rapid pace and the existing drinking water supply facilities cannot keep up with the increasing demand. Invariably the planning and construction of new large water supply plants just take a long time.
Pielkenrood offers a range of modular pre-fabricated, easy to install and to operate treatment units that not only can be used for the supply of safe drinking water in remote areas, but that are also eminently suitable for installation in city fringe areas where there is an immediate water supply requirement that cannot be satisfied by the existing city water works.
The advantages of our modular drinking water units summarised:
Compact, skid mounted self contained units;
The units can be quickly and easily installed without the need for complex equipment;
The modular concept allows for a phased extension in order to meet growing water demand. This means that investments for building a large water treatment plant designed to meet future water requirements is not needed at once. Investment only needs to take place if and when necessary, limiting the use of long term credits;
Our plants can be readily adapted to local circumstances and can be installed at almost any location;
The plants can be easily dismounted and re-assembled at another location;
Generally we use local sub-contractors to build and install our plants, thus saving on cost, easing logistics and shortening lead times.
In addition to modular pre-fabicated units Pielkenrood also offers full size water treatment plants. These plants are built up of large modules whereby the same principle of phased extension and thus phased investment can be applied.
Features of the full size plants are:
Space saving of up to 75% as compared to conventional treatment plants;
Insensitive to temperature gradients, therefore no floc carry over from the clarifiers;
Stable and reliable plant operation with longer filter runs;
Low operating and maintenance cost;
Below we describe the advantages of our drinking water units as compared to clari-flocculators.
To start with, our units are much smaller than clari-flocculators of a comparable capacity. Per square meter of land area the yield of our STR-plate clarifier unit is more effective by a factor of almost 3.7 as compared to that of a clari-flocculator unit.
Secondly our plants have an overflow rate which is about 74% of that of clari-flocculators. If a clari-flocculator intercepts flocs with a settling velocity of 1 m/h or higher, our plants intercept flocs with a settling velocity of 0.74 m/h. That means that in clari-flocculators more flocs will be simply carried over with the clarified water, causing shorter filter runs and thus more expensive operation.
Thirdly, the STR-plate clarifier system allows for easy, modular extension. This is an essential feature for any city planning. Cities expand and when business develops, water demand inevitably increases. If water supply can follow this trend with easy to build modular extensions of the existing drinking water supply plant, cost can be minimized.
Finally clari-flocculators require a complex system of piping and canals to distribute the water over the plant. Applying our STR- plate clarifiers results in a simple and easy to oversee plant, requiring less civil work and thus less investment.
From the above it will be clear that modular type STR-plate clarifiers offer several major advantages over clari-flocculators, not only in terms of land occupation but also with regard to easy extension, flexibility and vastly superior efficiency and performance.
Clari-flocculators are a system that dates back from the time that plate separators were not invented yet. Since the introduction of the plate separator, plate clarifiers with their obvious advantages have become a fully accepted – and more often a preferred - system in water treatment plants.