All wastewater is gravity fed into a Primary Sewage Tank where the waste undergoes settlement and digestion during a retention period of approximately 24 hours. The settled wastewater then flows into the Turbojet unit. This unit is divided into two distinct chambers - submerged contact aeration (S.C.A.) tank and humus tank.

Effluent from the Primary Sewage Tank then flows into the S.C.A. chamber. During regular time clock intervals, water and air are pumped into the S.C.A. tank by means of strategically placed jets. The jets are positioned so as to cause a vigorous overturning and turbulence of the tank contents. Effluent entering the S.C. A. chamber is forced into a spiralling flow pattern. A biomass develops within the sludge particles tumbling through the tank. This biomass assimilates nutrients and oxygen from the water leading to gradual reduction of impurities as the effluent passes through the tank. The effluent and sludge particles then flow into the humus tank where the sludge particles settle to the floor of the tank and the effluent flows upward through a contact media box. This box contains plastic contact media on which a biomass acts as a tertiary interception and removal centre for remaining B.O.D. and suspended solids, thus further polishing the effluent before flowing into the contact sampling pit where it is further clarified and chlorinated (if and when required by Health Inspector) before being discharged into the stormwater drain or other means of disposal.

Settled humus tank sludge is automatically returned to the inlet of the S.C.A. tank by means of a vortex lift pump, which in turn is driven by the main S.C.A. delivery pump. Effluent and sludge particles are also re-circulated through the primary sewage tank by means of a 12mm dia. by-pass feed line from the main S.C.A.delivery pump.

(a)  Excess sludge is returned to the primary sewage tank for storage and digestion. 

(b)  Clean effluent is recycled through the plant which tends to suppress the activities of
      micro-organisms which emit odours

(c)  By regularly recycling effluent, the circulating and fixed biomass in the S.C.A. tank is being fed
      with stored organics from the primary sewage tank. This keeps the micro-organisms at
      maximum population levels and reduces the problems of treatment plants not being used for
      extended periods e.g. vacations. Consequently, untreated effluent is prevented from being
      discharged from the unit when persons return suddenly from extended periods of non-use. 

•  Eliminates the problem associated with clogged sand filters and absorption beds.
•  Utilizes less valuable land space than sand filters or absorption drains.
•  Saves on expensive excavation costs in rocky or sloping terrain.
•  The Turbojet does not exhibit the same tank flotation problems as other available  S.T.P.'s.
•  Effluent discharge is of a consistently high standard.
•  Mechanical components in contact with wastewater are either Galv., P.V.C. or  Stainless Steel.
• The Turbojet can be completely installed in one day.
• Plant operation is noiseless and odourless
• Plant has a low ground profile and can be easily concealed with landscape gardening.
• Installation of unit can be carried out bv client or manufacturer.
• The Turbojet is supplied with an extra large capacity: Primary Sewage Tank (3200 litres) and Final Settling Tanks (1400 litres). Consequently. this unit requires less frequent desludging than comparable forms of  S.T. P.'s.
• All units are backed by 12 months warrantv and servicing,  with the option to continue the   servicing contract at the end of the warrantv period.
• Unit is unaffected by high ground water tables or swampy land.
• The Turbojet utilizes standard components that are readily available at any hardware or pump suppliers.
• As the Turbojet principle is operated and maintained by only one pump, this means a more  reliable and inexpensive Sewage Treatment Plant.