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Messer - Geschäftsbericht 2008

Special: 44 years economic history
Gigantisch: Tag für Tag reinigt das Wasserwerk von Changsa, China, bis zu 100.000 Tonnen Wasser.
Gigantic: day after day, the waterworks in Changsa, China, purify up to 100,000 tonnes of water.

 
Die Reinigung von Abwasser unterliegt strengen Kontrollen. Gase von Messer helfen dabei, die vorgeschriebenen Grenzwerte einzuhalten.
Wastewater purification is subject to strict controls. Gases from Messer help to comply with the statutory limits.

 

Environment

Environmental protection is more than just a phrase as far as Messer is concerned. This is also demonstrated by the fact that, in addition to their economic benefit, many of the company’s gas applications actively contribute to the protection of our environment.

China: oxygen for the treatment of drinking water

Since August of last year, the Changsha waterworks in China’s southern province of Hunan has been using oxygen to treat drinking water. The oxygen is used for the production of ozone in an ozone generator. Ozone is effective in removing organic and inorganic substances, such as iron and manganese, from water. As a strong oxidant and antiseptic, the gas is also capable of eliminating the odours and water discolouration caused by organic substances. Ozone promotes flocculation in water, thus enhancing the degradability of the organic contaminants, and, in small doses, helps to accelerate sterilisation. At the same time, ozone does not produce any waste products, in contrast to disinfection with halogens which does produce waste products (e.g. chlorine). In addition to supplying the gas, Messer China also provides support with the construction, operation and maintenance of gas plants. Currently the waterworks purifies up to 100,000 tonnes of water daily, which corresponds to a consumption of 1,400,000 cubic metres of liquid oxygen annually.

Romania: nitrogen and argon for Pirelli

In the next six years, the production of particulate filters for cars is set to triple at Pirelli Romania, a subsidiary of Pirelli & C. Ambiente Eco Technology. The European Union intends to tighten up even further the emissions regulations for particulates in built-up areas. To begin with, Messer will supply 2,300,000 cubic metres of nitrogen and 800,000 cubic metres of argon each year for Pirelli's new production facility at Bumbesti, in which the company is investing some 20 million euros.

Switzerland: Eternit Payerne

The production of fibre cement at Eternit (Schweiz) AG produces considerable quantities of wastewater, which has to be treated in the factory before it flows into the wastewater treatment plant. The cement-contaminated production wastewater (predominantly wash water) is extremely alkaline, with a pH that fluctuates between 12.2 and 13.2 in the course of a week. Until recently, the wastewater from the two Swiss factories was neutralised by burning heating oil and feeding the flue gas into the water. The plant in the Niederurnen factory now uses CO2 based on a liquid supply. The annual requirement is approximately 100 tonnes. The second factory in Switzerland – Eternit Payerne – is now also being converted to liquid CO2. The annual requirement for the Payerne factory is approximately 30 to 40 tonnes.

Czech Republic: wastewater in the steel industry

The world’s biggest steel producer, ArcelorMittal Steel, uses carbonic acid for wastewater neutralisation at its Ostrava site in the North East of the Czech Republic. After two trial periods at the end of 2007 and beginning of 2008, ArcelorMittal has placed an order with Messer Technogas for the supply of the necessary hardware as well as 400 tonnes of CO2 per year. The detailed trial phase primarily focused on the removal of various heavy metals from the wastewater. The wastewater mainly comes from the blast furnaces, sinter plants and slag cooling system on the site and undergoes purification in the wastewater treatment plant. Thanks to the use of CO2, there has been a marked reduction in the consumption of the previously used acid precipitate, iron sulphate. There has been a corresponding significant reduction in the amount of sludge that is produced in the wastewater treatment plant, which means a further cost saving.

Hungary: new ozone generator for pure water

Purer water for the inhabitants of Debrecen, Hungary’s second largest city: in July 2008, Messer Hungarogáz installed a new ozone generator for drinking water purification in the city’s waterworks and is supplying 100,000 cubic metres of oxygen a year for its operation. Previously, the ozone in Debrecen was produced on the basis of air. With the new generator, the ozone is produced from pure oxygen. This will bring cost benefits thanks to the ozone-oxygen mixture.

 

 

 


 

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