High on our agenda now is our forthcoming annual ‘Chemical Technology' Awards.
We invite engineers from all disciplines to submit their papers for the annual ‘Chemical Technology' Awards 2012. the categories are as follows:
Undergraduate Student of the Year 2012
Open to all final-year students in the chemical engineering departments at universities and other institutions. Each department should submit the three top projects for the year, as adjudged by the respective departments.
Research Paper of the Year 2012
Open to all post-graduates students in the chemical engineering departments at universities and other institutions.
Specialization Awards 2012
Open to institutions and industry, for work undertaken during 2011, and covering the specialization areas of Water and Energy (separate awards).
Each category will be sponsored and accompanied by a prize.
The criteria for submissions are as follows:
- Practicality of the method or design
- Financial benefits
- Sustainability issues, eg, does the design take environmental issues into account?
- To what extent does the method or design supersede what is currently available in practice?
- The submission must be relevant to the chemical engineering community
Closing date for entries (which should not be longer than six typed pages, double-spacing) is 30 April 2012.
For more information, email the Editor, Glynnis Koch, at firstname.lastname@example.org, or call her on 011 622 4770.
|This issue of Chemical Technology is available for interactive "page-flip" viewing. You'll need the latest Flash Plugin, and an ADSL or 3G internet connection to view the magazine smoothly.||You need to register with Crown Publications to read the online version of this magazine.|
Comment by Ndze Denis Jumbam, Walter Sisulu University
Sudoku No 66 and solution to No 65/Et cetera
‘Towards a sustainable pit latrine management strategy through LaDePa technology' is the title of the main feature in this section.
South Africa, along with most of the developing world faces significant challenges in the provision of sanitation services in general but in particular to the urban poor. Although South Africa has made significant inroads into the backlog in sanitation by the provision of pit latrines, very little with regard to the management of pit latrines, once they are full, has been done, particularly with regard to their sustainability.
LaDePa (Latrine Dehydration and Pasteurisation) is a machine that provides a containerized method of producing a nutrient-rich soil conditioner that is workable and improves sustainability on a number of fronts, by removing the detritus, pasteurizing and drying the sludge to beyond the sticky phase. Due to its use of low technology, the system relates well to the social environment where pit latrines are usually encountered in the developing world, urban environment, in that it provides both business and work opportunities for the poorly skilled.
Chemical plant design and construction
The feature article comes from UNEP in Norway and discusses, in an interesting case study of Heftingsdalen, the problem of over-consumption and waste. The area allocated to landfill is filling up much faster than in the gloomiest forecast. The current site has already reached the level originally planned for 2014. At this rate Heftingsdalen will soon be full, the only solution being to spill over into the surrounding forest. The plant could also obtain permission to raise the embankment making room for several tens of thousands more tonnes of waste, but that too is only a short-term solution.
This month, our article comes from India. ‘From seaweed to biofuels' looks at a recent agreement between Novozymes and Sea6 Energy whereby Novozymes, a world leader in bioinnovation, announced an exploratory research agreement with Sea6 Energy, an India-based company, to jointly develop a process for the production of biofuels from seaweed. The research alliance will use enzymes to convert seaweed-based carbohydrates to sugar, which can then be fermented to produce ethanol for fuel, fine chemicals, proteins for food, and fertilizers for plants. Novozymes will research, develop, and manufacture enzymes for the conversion process, while Sea6 Energy contributes its offshore seaweed cultivation technology.
"Seaweed is a natural complement to our efforts to convert other types of biomass to fuel ethanol," commented Per Falholt, Executive Vice President and CSO of Novozymes. "More than half of the dry mass in seaweed is sugar, and the potential is therefore significant."
A look at the next generation of thickener feedwells is the subject of this feature article by Dr A Krassnokutski, of Roymec Technologies, Johannesburg. Metallurgical thickeners have evolved over the past century in large technological leaps rather than through slow and steady progression. The first of these technological leaps was the introduction of polymer flocculants in the 1950s which transformed large diameter conventional thickeners into smaller diameter high rate thickeners The next leap was the development of more efficient feedwells in the 1980s which better mixed the flocculant into the feed and more evenly distributed the feed into the thickener body. Lastly, was the development of so-called 'auto-diluting' systems some 20 years ago.