http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 13.29Change: -0.09
R/$ = 11.70Change: -0.05
Au 1207.85 $/ozChange: 1.57
Pt 1174.50 $/ozChange: -1.50
 
 
Note: Search is limited to the most recent 250 articles. Set date range to access earlier articles.
Where? With... When?








Start
 
End
 
 
And must exclude these words...
Close Main Search
Close Main Login
My Profile News Alerts Newsletters Logout Close Main Profile
 
Agriculture   Automotive   Chemicals   Competition Policy   Construction   Defence   Economy   Electricity   Energy   Environment   ICT   Metals   Mining   Science and Technology   Services   Trade   Transport & Logistics   Water  
What's On Press Office Tenders Suppliers Directory Research Jobs Announcements Letters Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
Jun 01, 2012

Combined technology alleviates water challenges

Back
Engineering|Africa|Chutes|Consulting|Environment|Pipes|Resonant Environmental Technologies|Resonant Group|Resonant Water|System|Systems|Waste|Water|Africa|Russia|Chlorine-based Systems|Electricity Savings|Energy|Equipment|Inefficient Water Management|Less Electricity|Maintenance|Pipes|Potential Energy|Systems|Ultraviolet Disinfection Systems|Consulting Engineers|Environmental|Chris Laubscher|Marno Raath|Olof Vorster|Waste|Water|Aeration|Biofiltration|CW Technology|Wastewater Treatment
Engineering|Africa|Chutes|Consulting|Environment|Pipes|System|Systems|Waste|Water|Africa||Energy|Equipment|Maintenance|Pipes|Systems||Consulting Engineers|Environmental|Waste|Water|
engineering|africa-company|chutes|consulting-company|environment|pipes|resonant-environmental-technologies|resonant-group|resonant-water|system|systems-company|waste-company|water-company|africa|russia|chlorine-based-systems|electricity-savings|energy|equipment|inefficient-water-management|less-electricity|maintenance|pipes-industry-term|potential-energy|systems|ultraviolet-disinfection-systems|consulting-engineers|environmental|chris-laubscher|marno-raath|olof-vorster|waste|water|aeration|biofiltration|cw-technology|wastewater-treatment
© Reuse this



The challenge of inefficient water management, from source to consumption, facing the South African water sector can be mitigated with the use of water and effluent engineering company Resonant Water’s internationally designed Combined Works (CW) technology, says director Marno Raath.

Resonant Water is a subsidiary of environmental engi- neering company Resonant Environmental Technologies.

The CW technology can be beneficial to the South African and African water sectors in a number of ways, says Raath, noting that the technology combines the four main processes associated with wastewater treatment, namely sedimentation, aeration, biofiltration and activated sludge methods, one process.

After preliminary mechanical treatment (to separate sus- pended solids and sands), sewage is drawn into a mixing chamber, where it is mixed with the sludge liquid coming from an aerotank settler.

The mixture of sewage and sludge is drawn from the mixing chamber with a circulation pump and sent to the biofilter sprinkling system which comprises spouting chutes with outlet pipes and reflecting disks.

The water jets are then broken on the disks, irrigating the biofilter feed, after which the liquid leaving the biofilter is collected in a tray and delivered to the aeration zone of the aerotank settler by air-stripping towers.

“This is done using potential energy and, therefore, eliminates the need for blowers and aerators as well as the use of the return- activated sludge pumpstation and the waste-activated sludge pumpstation, which leads to significant electricity savings,” he adds.

Eliminating this equipment also decreases the system’s maintenance requirements and it requires less land space to function effectively, says Resonant Group marketing and business development director Olof Vorster.

Maintenance costs are further reduced owing to the technology, which uses ultraviolet disinfection systems instead of traditional chlorine-based systems.

“The system uses 25% less electricity, requires 30% less maintenance and saves more than 60% on land space, compared with conventional water treatment works, while delivering safe and odourless water,” he adds.

Further, Resonant Water states that the CW process is consistent, irrespective of the size of the plant, which makes skills transfer and the applicability of skills between different plants easier.

“As wastewater treatment plants are traditionally customised, there is little standardisation in this industry, creating difficulties when workers from one plant need to move to another. CW addresses this,” assures Raath.

The CW process was independently investigated by Dr Chris Laubscher from engineering consultancy Sizatech Consulting Engineers. “The CW process is extremely competitive compared with most known wastewater treatment processes, especially with regard to operational costs,” he says.

Laubscher adds: “The CW process has been found to deliver effluent capable of conforming to at least the general standards set out by the National Water Act, while most of the requirements of the special standards can also be met without adapting the current process.”


The CW system was developed in an enclosed format to ensure its compatibility with the severe ambient temperature fluctuations in Russia.

The technology was designed to limit heat exchange between the system and the environment. This is necessary as wastewater treatment is a biological process that makes use of microorganisms, which function better at a stable temperature.

“We recognised that this characteristic could also be beneficial in Africa, as the continent is subject to high temperatures,” says Raath.

The enclosing of the system also leads to greater efficiency, as the pathogens that are generated by the system mainly stay inside the plant, compared with conventional treatment systems, where mixers and aerators release pathogens into the air.

Another benefit of the enclosed system is that the sanitary zone, or the radius around the plant up to which one can build, is much smaller than with conventional plants, Vorster points out.

“Currently, the sanitation zone around conventional water treatment plants is 500 m in circumference, while this technology has a European rating of 16 m,” Raath adds.

The first local plant using this technology was commissioned at a game lodge outside Modimolle, in Limpopo, in November last year. The plant treats 7 500 ℓ/d of wastewater to produce drinking water and water for irrigation purposes.

Resonant Water aims to build a 3.4-million-litre-a-day plant and a 12.5-million-litre-a-day plant within the next two years.

Edited by: Chanel de Bruyn
© Reuse this Comment Guidelines (150 word limit)
 
 
 
 
 
 
 
 
Other Water Engineering and Infrastructure News
WATER IMPORTANCE The major problem with the current management of water infrastructure is a lack of uniformity
Managing risk in the water services sector is key to the longevity and cost efficiency of South Africa’s water infrastructure, according to multinational professional services firm Arup.
MANAGING WATER NETWORKS The competition required learners to create a water distribution network to distribute 3 ℓ of water equally between three points on a grid using two different diameter pipes and connection pieces
Brackenfell High School, in Cape Town, was the winner of civil engineering institution South African Institute of Civil Engineering’s (Saice’s) yearly water infrastructure competition, which was titled Aqualibrium, this year.
SIMPLE GRATING Advantages of Vitaglass gratings include a weight reduction to about half of steel gratings
Corrosive conditions in the African water treatment sector have created a high demand for hard-wearing, versatile materials, designed for enhanced safety, according to gratings, treads, pressed floors and handrails company Vital Engineering.
More
 
 
Latest News
President Jacob Zuma
Updated 13 minutes ago South Africa's economy remains racially structured, President Jacob Zuma said on Tuesday. Welcoming members of the second presidential black economic empowerment council at Tuynhuys, Cape Town, he told them they needed to tackle this historical legacy because it was...
Updated 37 minutes ago The failure of one in seven small and medium-sized enterprises (SMEs) within the first year of operation was not a result of a lack of access to funding, Absa South Africa head of business banking Happy Ralinala asserted on Tuesday. Access to market and relevant...
Cooperative Governance and Traditional Affairs Minister Pravin Gordhan
Updated 1 hour 15 minutes ago One in three municipalities is dysfunctional, according to a study conducted nationwide, Cooperative Governance and Traditional Affairs Minister Pravin Gordhan has said. Gordhan said the Back to Basics Programme based this finding on four criteria, namely economic,...
More
 
 
Recent Research Reports
Construction 2015: A review of South Africa’s construction sector (PDF Report)
Creamer Media’s Construction 2015 Report examines South Africa’s construction industry over the past 12 months. The report provides insight into the business environment; the key participants in the sector; local construction demand; geographic diversification;...
Liquid Fuels 2014 - A review of South Africa's Liquid Fuels sector (PDF Report)
Creamer Media’s Liquid Fuels 2014 Report examines these issues, focusing on the business environment, oil and gas exploration, the country’s feedstock supplies, the development of South Africa’s biofuels industry, fuel pricing, competition in the sector, the...
Water 2014: A review of South Africa's water sector (PDF Report)
Creamer Media’s Water 2014 report considers the aforementioned issues, not only in the South African context, but also in the African and global context, and examines the issues of water and sanitation, water quality and the demand for water, among others.
Defence 2014: A review of South Africa's defence industry (PDF Report)
Creamer Media’s Defence 2014 report examines South Africa’s defence industry, with particular focus on the key participants in the sector, the innovations that have come out of the sector, local and export demand, South Africa’s controversial multibillion-rand...
Road and Rail 2014: A review of South Africa's road and rail infrastructure (PDF report)
Creamer Media’s Road and Rail 2014 report examines South Africa’s road and rail transport system, with particular focus on the size and state of the country’s road and rail network, the funding and maintenance of these respective networks, and the push to move road...
Real Economy Year Book 2014 (PDF Report)
This edition drills down into the performance and outlook for a variety of sectors, including automotive, construction, electricity, transport, steel, water, coal, gold, iron-ore and platinum.
 
 
 
 
 
This Week's Magazine
Subscribe to Engineering News and Mining Weekly for two years, but only pay for the first year.  The weekly editions of Engineering News and Mining Weekly will be posted to your preferred postal address and also gain access to:
National flag carrier South African Airways (SAA) is in an advanced stage of renegotiating its deal with European airliner manufacturer Airbus to acquire A320 single-aisle (or narrow body) aircraft. The aim is to replace ten of the aircraft still on order with five...
Worldwide, the main thrust in the ports industry over the past decade or more has been to increase efficiency. Traditionally, ports have been run by engineers and mariners and, in the past, increasing a port’s capacity was achieved by expanding the harbour. “That has...
What do you do when an elephant has a toothache? You call Dr Gerhard Steenkamp from the University of Pretoria’s (UP’s) faculty of veterinary science, Onderstepoort, one of only two elephant ‘dentists’ in the world.
The 2015 Sanlam/Business Partners Entrepreneur of the Year (EOY) competition was launched earlier this month in Johannesburg, with the main focus on creating and inspiring entrepreneurs to create jobs and boost the economy.
 
 
 
 
 
 
 
 
 
Alert Close
Embed Code Close
content
Research Reports Close
Research Reports are a product of the
Research Channel Africa. Reports can be bought individually or you can gain full access to all reports as part of a Research Channel Africa subscription.
Find Out More Buy Report
 
 
Close
Engineering News
Completely Re-Engineered
Experience it now. Click here
*website to launch in a few weeks
Subscribe Now for $96 Close
Subscribe Now for $96