Nov 11, 2011
Wine purification technology lowers chemicals requirementBack
SECURITY|Environment|Filtration|Johan Jordaan|Security|SurePure|Sustainable|Security|Energy|Harmful Chemical Intervention|Less Chemical Intervention|Light Energy|Security|Ultraviolet Light Energy|Jeff Grier|Jordaan|Security|Steve Miller
© Reuse this
Following government’s approval of the use of ultraviolet light energy for liquid purification in oenological practices, acceptance of turbid liquid photopurification company SurePure’s technology has gained momentum among local winemakers.
SurePure marketing executive Steve Miller says the approved SurePure photo- purification method uses light energy to disinfect wine.
The technology limits harmful chemical intervention, reducing the need to add sulphur and other disinfectant additives.
Miller explains that the technology can replace, or act as an adjunct to, many other traditional wine filtration processes.
“It can replace sterile filtration, which strips colour and flavour from wine. Photo- purification also requires less chemical intervention, either with sulphur or other substances such as dimethyldicarbonate or pimaricin, which has now been banned in the South African wine industry,” he says.
In addition, the technology has a positive impact on the environment and on consumers’ wellbeing, reports the company.
Miller notes that the focus on reducing sulphur content also ensures a more sustainable and less environment-invasive approach to winemaking.
Positive Industry Feedback
Spier Wines winemaker Johan Jordaan says he initially used the technology to treat wines that suffered from stuck fermentations prior to restarting them.
“This wine was passed through the SurePure unit once, without being filtered. The volatile acidity of this wine was stable and after the successful referment, the wine had no sluggish or stuck ferment odours. I have also used it to stop the fermentation of a rosé to have a higher residual sugar content,” he says.
Jordaan believes that there is a place for the SurePure technology in the market and that good wines with low sulphur can be produced, provided that the fundamental rules of chemistry are followed to preserve them.
“I think that white wines with a low sulphur content should be drunk very young or sealed with a screw cap to preserve the freshness, whereas the red wines can be stored for longer, provided that you have ample extract in the form of tannin to help preserve the wine against oxidation,” says Jordaan.
To prove his theory, Jordaan bottled a Merlot wine from the 2009 vintage, and closed it with a screw cap as a sample.
He did not add sulphur, acid, tannin or any other substances to the wine before or after fermentation.
“The sample stood in my office for two years. I opened the wine prior to the 2011 harvest to taste it. The wine was fresh and clean – no oxidation, no off flavours and no browning of colour.
“I expected oxidation, at least. This proves the point of low, or even no, sulphur. The fact that the wine passed through the SurePure unit only once makes it even more interesting. I did not do chemical- or micro-analyses on the wine, but organoleptically, it was fine, even after two years on a desk in an office,” he says.
Further, Steenberg Vineyards also used the technology to limit the amount of sulphur needed to treat its wines.
“We treated a batch of Merlot in 2009. No sulphur was added to the grapes or to the wine, and the wine showed more colour and more pronounced fruit in its youth. The wine showed that different flavour compounds, with fresh fruit flavours, could be a good blending component. After 12 months’ ageing in barrels, the wine showed slightly more oxidation characters than the ones with sulphur added, but still with good freshness,” Steenberg Vineyards winemaker JD Pretorius explains.
Meanwhile, Villiera Wines cellarmaster Jeff Grier used the SurePure process on a sulphur-free base wine.
Grier adds that Villiera Wines is exploring some other opportunities this year and intends to use SurePure for additional microbiological security.
SurePure expects an increasing number of vineyards to adopt the technology in the near future. “A growing consumer preference for fresher wines, combined with wine- makers’ focus on a less invasive approach to winemaking, and increasingly draconian additive legislation, makes SurePure a sure bet for the future,” says Miller.
Edited by: Chanel de Bruyn© Reuse this Comment Guidelines (150 word limit)
Other Brewery and Winery News
Hotel group Tsogo Sun spent just under R3.2-million at two wine auctions this year, namely the Nederburg and Cape Winemakers Guild auctions, highlighting its commitment to offering guests at its hotels an exceptional quality food and beverage experience. The group...
Updated 7 hours ago Dual-listed oil and gas company SacOil has completed Phase 1 of the field development operations at the Lagia oilfield in Sinai, Egypt. The South African-based independent company, through its subsidiary Mena International Petroleum Company, also completed hydraulic...
Updated 7 hours ago The City of Johannesburg, whose environmental policy innovations include an integrated waste management plan that covers all relevant environmental legislation, has been named the country’s most environment-friendly metropolitan municipality in the Department of...
Updated 7 hours ago The South African Renewable Energy Council (Sarec) has welcomed the conclusions of the Council of Scientific and Industrial Research’s (CSIR’s) ‘Financial benefits of renewables in South Africa in 2014’ report, published on January 21. “The results of this study...
Recent Research Reports
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.
Real Economy Insight: Automotive 2014 (PDF Report)
This four-page brief covers key developments in the automotive industry over the past 12 months, including an overview of South Africa’s automotive market, trade figures, production and the policies influencing the sector.
This Week's Magazine
Three-dimensional (3D) printers being sold in South Africa by electronics distributor Rectron currently print in two types of plastic, but have a clear upgrade path over the next five years to eventually print in wood, ceramics and metal-alloy materials, says Rectron...
The world’s two dominant commercial aircraft manufacturers, Airbus of Europe and Boeing of the US, both recently announced that they had made record aircraft deliveries in 2014. Boeing set a global record for the industry with 723 commercial aircraft delivered, while...
The Western Cape is shifting further into the renewable-energy space with the official opening of a factory specialising in solar inverters, a key component of solar photovoltaic (PV) plants. The investment in the manufacturing facility in Cape Town aims to boost the...
Business Leadership South Africa (BLSA) last month welcomed Cabinet’s establishment of a technical team war room to undertake various interventions to improve electricity supply security over the short- and medium-term, but added that the private sector also had a...
Despite a rapid rise in mobile connections and the economic and social benefits of such connectivity, more than half of the world ended 2014 unconnected. For this reason, industry commentators believe the biggest impact of mobile technology is still to come –...
Next ArticleWine tank manufacturer reports healthy order book