Programme

Start Time:

08:00 AM

End Time:

R350 per person includes – return coach transport, soft drinks on coach and snack boxes

Includes Wine Tasting and Lunch at KWV

Start Time:

08:00 AM

End Time:

R350 per person includes – return coach transport, soft drinks on coach and snack boxes

Includes Wine tasting and Lunch at KWV

"Sludge management arising from wastewater treatment processes has received increased attention recently, culminating in the publication of a comprehensive set of Best Practice Guideline documents that has been released into the sector for application by all parties involved and following a thorough engagement with local stakeholders and international trends and reviews.

As a result, sludge handling technologies available in the market place have received increased attention by consultants, watercare plant owners, operators, local and national authorities and technology suppliers.
The Volute® Dehydrator, developed solely by the Japanese based company AMCON and based on dewatering and thickening of sludge passed through a volute by an inclined screw through a series of fixed and loose rings, is being distributed not only in South Africa and Africa, but worldwide through distribution agreements. Tecroveer has a mobile Volute® unit that can be set up at Paarl WWTW site, at Drakenstein Municipality, to demonstrate the design, operation and functioning of the Volute®.

The tour to Drakenstein will also afford delegates the opportunity to visit a portion of the winelands, which may be an added attraction which will be co-opted into the technical tour programme by way of a lunch or wine taste stopover. The Paarl WWTW site has the added advantage of having belt presses installed as well, allowing for additional comparison of sludge dewatering technologies. In addition, a trial thermal sludge drying technology is on site that could possibly be included.

Tecroveer is the sole distributor of the Volute® across sub-Sahara Africa, we be responsibility for the hosting of this technical tour. They will be inviting their main principal from Japan to be present as well and to attend WISA"

Sludge handling and management at watercare works across South Africa has received increased attention and focus recently, particularly with the release of the Sludge Management Guideline series of documents that was made available through the Water Research Commission and Department of Water Affairs.

The technical tour to the Paarl WWTW provides delegates with an opportunity to view the existing installed sludge dewatering technology as well as the Volute® Dehydrator as an alternate technology, in operation.

The Paarl WWTW was first commissioned in 1934 and comprised the biological filtration, or fixed film, process. The works was extended in 1956. In 1993 the works was extended with the addition of an activated sludge, or suspended growth, process. A fourth upgrade was undertaken in 2005 and the works is currently being extended to treat 35ML/day against the current treatment capacity of 25ML/day.

Tecroveer invite you to accompany them on the tour, where waste activated sludge as well as anaerobically digested sludge dewatering can be observed.

The tour will end off with a brief stopover at the KWV Wine Estate for a wine tasting and tour. Please note that Buses will depart from the ICC Convention Centre at 08h00 sharp and will return at 16h00. Tea, coffee and breakfast snacks will be available at the Paarl WWTW and a light lunch is included in the KWV Wine Estate visit.

Start Time:

08:00 AM

End Time:

R350 per person includes – return coach transport, soft drinks on coach and snack boxes

The ground breaking and award winning Nereda®, biological wastewater treatment works (WWTW) in Gansbaai in the Western Cape recently celebrated its second anniversary of trouble free operation. The Gansbaai plant won the 2009 SAICE National Award for Technical Excellence.

Nereda® is a revolutionary wastewater treatment technology that was developed by scientists at the University of Delft in the Netherlands in conjunction with the DHV Group, STOWA – the Dutch Water Research Institute and several Dutch water boards who co-funded the research and built pilot plants to test the concept. SSI Engineers and Environmental Consultants is part of the DHV Group and were responsible for the Gansbaai project.

Compared to traditional processes Nereda® offers huge benefits – a reduction of operating energy of between 30-40%, a reduction of plant footprint of between 50-70%, lower construction costs and the Nereda® process does not require chemicals.

The Gansbaai plant was the first full scale production plant in the world using this technology and provided a vital ‘test bed’ for the recently commissioned Epe plant in The Netherlands, the largest WWTW yet featuring Nereda® technology. The Epe plant located some 80km due east of Amsterdam, serves a population of 59,000 people and in addition to domestic waste water, handles industrial effluent from a local slaughterhouse.

SSI is busy with a second South African plant at Wemmershoek, Stellenbosch, following two years of successful operation at Gansbaai. The Nereda® aerobic biomass treatment process produces consistently high quality final effluent suitable for environmental discharge or for irrigation. However, with additional polishing steps the final effluent can be processed to potable standards.

Nereda® meets both current Dutch and international treatment standards and the forthcoming stricter EU regulations for the treatment of wastewater.

How it works? For more than a century, sewage has been treated with bacteria that form flocs. In this water treatment method, bacteria are mixed with oxygen to clean the wastewater. After the bacteria remove the polluting substances from sewage, these organisms are separated from the cleaned water in sedimentation tanks which require space and the bacteria must be pumped back from these tanks to keep repeating the process. This pumping process requires energy; pumps need regular maintenance and must be replaced when worn out.

The secret of Nereda® technology is that the purifying bacteria form unique granules instead of conventional flocs, which settle much faster and all the bacteriological processes take place simultaneously within the granule.

This is radically different from the traditional method where the process takes place in various sections of the treatment plant and requires various reaction compartments. In the granules, aerobic, anoxic and anaerobic compartments are formed and as a result, different bacteria can do their job simultaneously. Pumps and other mechanical equipment to transport these organisms between different sections of the plant are no longer needed making the treatment plant more energy efficient and uncomplicated. The significance of the Nereda® advantage was demonstrated to invited municipal guests at the recent IMESA 2011 Conference. Many who witnessed the presentation face the challenges of inadequate treatment facilities, lack of space for expansion, noncompliance with Green Drop standards, capital cost containment, rising energy costs and a lack of skilled operators. Nereda® addresses all these concerns.

The tour includes a stopover at “Hemel and Aarde” Wine estate as well as a light lunch.

Start Time:

08:30 AM

End Time:

R350 per person includes – return coach transport, soft drinks on coach and snack boxes

Includes Wine Tasting and Lunch at KWV

The Atlantis Water Supply Scheme utilizing groundwater has been in operation since 1976. The scheme was developed to supply water to the growth node of Atlantis as well as the adjacent villages of Mamre and Pella. As a new growth node the greenfield development was designed to couple residential areas to an industrial zone. This afforded the opportunity to design an integrated water resource with managed groundwater recharge using stormwater runoff and treated effluent. The necessity of this was evident as the area is at the limits of the potable water supply network associated with the Cape Town metropolitan area. Abstraction was started in the Silwerstroom wellfield and later the Witzands wellfield as the area developed. The associated infrastructure to deal with runoff and effluent for managed artificial recharge was put in place as development progressed in phases. By 1997 it became necessary to augment the natural and recharged groundwater supply with treated potable water via a pipeline from the city bulk supply reticulation, commissioned in 2000. The scheme has successfully operated for the past 30 years as an integrated water resource delivering high quality potable water to domestic and industrial consumers.

The Site Visit Tour will encompass a presentation starting at the Witzands Water Treatment Plant and then proceed to easily accessible parts of the infrastructure, comprising a detention basin, a retention pond and a borehole. The 20minute presentation followed by questions will provide a good understanding of the Scheme process and layout as an extensive field trip would be too time consuming. The tour will take approximately 5 hours including travel time from the City to Atlantis and returning, starting at 8.30 am. The tour group will be limited to 25 participants.