http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 13.13Change: -0.02
R/$ = 12.07Change: -0.13
Au 1187.17 $/ozChange: -20.08
Pt 1125.50 $/ozChange: -23.50
 
 
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
Updated 10 minutes ago Economic bilateral relations between South Africa and Peru will receive a shot on the arm when businesspeople from the two countries gather in Lima, Peru, to launch the South Africa–Peru Chamber of Commerce (Sapcham) on Wednesday. The chamber aimed to increase trade...
Tongaat Hulett CEO Peter Staude
Updated 35 minutes ago JSE-listed Tongaat Hulett CEO Peter Staude told shareholders and analysts on Tuesday that of the company’s land assets, 39% was either in the process of undergoing an environmental-impact assessment, being released from agriculture, had formally submitted a planning...
Updated 43 minutes ago Trade union Solidarity on Tuesday lambasted government for importing foreign skills in the form of 48 Cuban engineers, instead of appointing South African engineers, calling it a “disgrace”. The first of 48 Cuban engineers, appointed to improve service delivery in...
More
 
 
Recent Research Reports
Steel 2015: A review of South Africa's steel sector (PDF Report)
Creamer Media’s Steel 2015 report provides an overview of the key developments in the global steel industry and particularly of South Africa’s steel sector over the past year, including details of production and consumption, as well as the country's primary carbon...
Projects in Progress 2015 - First Edition (PDF Report)
In fact, this edition of Creamer Media’s Projects in Progress 2015 supplement tracks developments taking place under the Renewable Energy Independent Power Producer Procurement Programme, which has had four bidding rounds. It appears to remain a shining light on the...
Electricity 2015: A review of South Africa's electricity sector (PDF Report)
Creamer Media’s Electricity 2015 report provides an overview of State-owned power utility Eskom and independent power producers, as well as electricity planning, transmission, distribution and the theft thereof, besides other issues.
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.
 
 
 
 
 
This Week's Magazine
While economic forecasts for the African continent are most favourable, African airlines may not be able to benefit from the expected growth in the region’s gross domestic product (GDP), International Air Transport Association VP: Africa Raphael Kuuchi has warned....
The Automotive Production and Development Programme (APDP) will need to change substantially post 2020, says Metair Investments South African operations COO Ken Lello. “We must not make tweaks. We have to change. What we are doing is not sustainable.”
Banking group Absa’s forecast is for the rand to end the year at around R13 against the dollar, weakening further to R13.50 by 2016, says Absa sectoral analyst Jacques du Toit. He warns that possible interest rate hikes in the US may see capital being pulled from...
The Dispute Resolution Centre at the Bargaining Council for the Civil Engineering Industry (BCCEI) is now open to handle party-to-party disputes. The BCCEI represents the interests of all level four to nine Construction Industry Development Board companies.
FREDRIK JEJDLING Sustainability becomes an important part of a business’ decision-making process
Communications technology firm Ericsson sub-Saharan Africa head Fredrik Jejdling says the company’s commitment to sustainability and corporate responsibility has been integrated into all facets of its operations, which has provided it with sustainable revenue...
 
 
 
 
 
 
 
 
 
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