Construction World July 2016

GREEN FILTER PLANT The Wildlands Green Filter Plant is the result of collaborative efforts to address the serious pollution problems of the Plankenbrug River in Stellenbosch and Sika is proud to be one of the main sponsors of this great green initiative.

The Plankenbrug River receives greywater, polluted stormwater and effluent overflow from Kayamandi and

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systems not only solve ecological challenges, but provide significant opportunities for job creation, therefore addressing the principles of the Green Economy. This is the first initiative of its kind to take place in South Africa. The concept of Eco-Ma- chine technology consists of 14 white water tanks with connecting pipes and river plants in it, where the roots of these plants will act as filters to the river water, thus purifying it. As the water flows from one tank to another, the plants will also differ, because some plants can grow in very polluted water and others need clean water to grow; an innovative way to use nature to cleanse itself. The Inauguration of the Wildlands Green Filter Plant Plankenbrug in Stellenbosch took place on 16 March 2016 and included a full

Enkanini Informal Settlement of Stellenbosch. The recently formed Stellenbosch River Collabo- rative was looking to improve the water quality in the town’s rivers, and, through funding raised by Wildlands, is supporting the piloting of Eco-Ma- chine Technology to divert and treat water from the Plankenbrug River. “This approach is ground breaking and could, if piloted successfully and monitored carefully to ensure success, revolutionise the wastewater treatment facilities in Langrug and similar areas of the Western Cape (and the rest of South Africa and Africa),” said Jonny Harris of Isidima, one of the developers of the Eco-Machine Technology. “What is most relevant is that these

programme leading up to the official opening, carried out by the Mayor of Stellenbosch Munic- ipality, Conrad Sidego, followed by a tour of the eco plant. “Wildlands would like to highlight that none of this groundbreaking work would have been possible without the support of its partners,” said AndrewWhitley, deputy director of the Greening your Future initiative at Wildlands.

ECONOMICAL SUBMERSIBLE WASTE WATER PUMP

on the design of the cable gland. Indi- vidual conductors stripped, tinned and sealed in resin ensure that the cable gland is absolutely watertight even in the event of damage to the cable sheath or the insulation. This also effectively protects the pump from short circuits. To ensure that the pumps can be easily dismantled even after years of operation under tough conditions, all wetted screwed connections are made of stainless steel.

KSB Pumps and Valves has released its highly efficient range of Amarex KRT submersible motor pumps for handling municipal and industrial waste water in an effective and cost effective manner.

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Taking their cue from previous models, KSB engineers have further improved the operating reliability and

Despite this, KSB electric drives for these modern submersible motor pumps are ultra-efficient. Depending on a system’s load profile, users can choose a highly efficient motor variant which corresponds to the IE3 efficiency level for standardised motors in accordance with the IEC-60034-30 standard. Such motors are particularly interesting for powerful pumps with a high start-up frequency. Two bi-directional mechanical seals reliably protect the motor space against ingress of water. A chamber filled with environmentally friendly oil ensures cooling and lubrication of the mechanical seals even when gas-laden fluids have to be pumped. Generously dimensioned ball bearings sealed for life support the stainless steel shaft with a special focus also being placed

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hydraulic efficiency to squeeze more out of the pump. By focusing on the typical operating ranges of waste water pumping stations, the developers have adjusted the impellers’ free passages to not only comply with the applicable standard, but also to allow the pumps to offer as broad a range of applications as possible. Available with four different improved impeller types, the submersible motor pumps can achieve amaximumflow rate of 10 080m³ per hour and a head of 120 m. With 850 kW of power on tap, it offers the highest standard motor power available on the market today.

For transporting acid waste water, KSB also supplies pumps made from high-grade stain- less and acid-resistant duplex steel.

Amarex KRT submersible motor pump.

CONSTRUCTION WORLD JULY 2016