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mithra · Joined: 06 Sep 2010 Posts: 853

As with all highly concentrated industries, glassworks suffer from moderately high local environmental impacts. Compounding this is that because they are mature market businesses they often have been located on the same site for a long time and this has resulted in residential encroachment. The main impacts on residential housing and cities are noise, fresh water use, water pollution, NOx and SOx air pollution, and dust.

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david · Joined: 04 Apr 2011 Posts: 341

Noise is created by the forming machines. Operated by compressed air, they can produce noise levels of up to 106dBA. How this noise is carried into the local neighbourhood depends heavily on the layout of the factory. Another factor in noise production is truck movements. A typical factory will process 600T of material a day. This means that some 600T of raw material has to come onto the site and the same off the site again as finished product.

Water is used to cool the furnace, compressor and unused molten glass. Water use in factories varies widely, it can be as little as one tonne water used per melted tonne of glass. Of the one tonne roughly half is evaporated to provide cooling, the rest forms a wastewater stream.

Most factories use water containing an emulsified oil to cool and lubricate the gob cutting shear blades. This oil laden water mixes with the water outflow stream thus polluting it. Factories usually have some kind water processing equipment that removes this emulsified oil to various degrees of effectiveness.

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david · Joined: 04 Apr 2011 Posts: 341

s the latest studies approve, the European photonics industry is steadily growing. In the last years the growth was substantially higher than the GDP growth for the EU25 countries. Sectors such as production technology, medical technology and life science earn 26% of the total EUR 43.5 billion turnover.

Micro optical components and systems often serve as an important enabler for innovative products in the laser, life science or biotechnology market. At this point the role of glass micro optics becomes more and more important. Advantages of ultra precise optical components made of glass e.g. are their resistance against environmental impact, their biocompatibility and their capability of being used in high power applications. The ongoing miniaturization and the continuously growing quantities are only two issues which let to a change in optics manufacturing within the last decade. Direct manufacturing techniques such as grinding and polishing could no longer meet the requirements of the demanded micro optical components, so the precision glass molding was set up to keep step with the technical developments in optics design. By applying this manufacturing technique large quantities of ready-to-use and highly precise optics can be produced.

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