PREFACE TO THE
MAXI "GEM" SEWAGE TREATMENT PLANT
Following this document, the reader may have observed the introduction to our mini sewage treatment plant which has now, over the past two years, almost become a household name in fields where a septic tank and soakaway would be prohibited for many reasons. These restrictions apply to dolomitic areas, to clay areas and to environmentally sensitive areas, to mention but a few, which necessitate an on-site treatment plant where no toxicity would enter the sub soils.
The first noticeable feature when comparing the mini "GEM" with the maxi "GEM" is that, whilst the mini model incorporates two tanks only, the maxi model consists of four tanks. These four tanks are basically: first tank –primary anaerobic digestion, second tank - secondary anaerobic digestion, third tank - aeration and a partial sludge return to on-start anaerobic section, and, finally, the fourth tank is that of a settler/holding tank, wherein a submersible pump is placed for removal of the water-like fluid.
In explaining the process briefly, the first tank has been fitted with our own design of diffuser, which holds back the incoming sewage and retards the flow thereof to the second tank. The holding back process ensures maximum digestion possible before entering the second tank. The second tank again holds back the now considerably digested sewage and is allowed to be retarded in passing on to the aeration chamber. The third tank, aeration, consists of an aeration mat in the base, from which oxygen emits from a small blower which is in action at all times; further, an airlift pump of our own design allows a controlled quantity of sludge to be returned to the initial anaerobic tank on a constant basis. Both the regulation of oxygen to the chamber and the volume of sludge returned are determined by yourselves, and will finally be set when the plant is fully commissioned. The fourth tank receives water-like fluid from the aeration tank after passing through an extremely efficient in-line chlorinator, and the submersible pump is controlled by a float switch; an emergency overflow is incorporated to prevent flooding of the plant should there be a failure in the power supply.
Whilst the mini "GEM" is designed to accommodate a household of 4 capita, the maxi "GEM" will
accommodate 10 – 15 capita.
Thus, having explained a brief outline of the maxi "GEM", most other literature pertaining to the mini is applicable. Naturally, the excavation for the maxi is somewhat longer (although not deeper) than that of the mini.
It is suggested that, should the reader require further particulars or technical advise, he should not hesitate in contacting us via telephone, e-mail or fax, when such enquiry will receive our immediate attention.
Owing to the constant increases (world-wide) in the price of plastics raw materials and labour, our quoted prices are subject to escalation without notification.
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JB/13344
Revised December 2005
Ballam-Waterslot, PO Box 40482 Arcadia, Gauteng 0007
Tel:012 347 9151/9013 Fax:012 347 9174 Cell:082 417 8069
e-mail: ballam@mweb.co.za
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