Generating solar energy is considered `green technology`, even though the production of solar cells based on silicon predominantly uses process stages that have been common practice in the semiconductor industry for many years. As in the semiconductor industry the production of solar cells employs dangerous and environmentally harmful substances, which require abatement according to legal provisions. The production of photovoltaic cells therefore is subject to strict requirements for treatment of waste gases and wastewater. Solutions need to be easy and cost-effective. The contaminated wastewaters and waste gases should, under no circumstances, lower performance, endanger the health and safety of humans, or otherwise negatively affect the availability of production facilities. The safety of the production line must be guaranteed at every step and in every operating situation.
By DAS Environmental Expert GmbH based in Dresden, GERMANY.
Gasification and synthetic gas production from various waste products are becoming increasingly important energy recovery technologies. Often, the synthetic gas contains various hazardous contaminants including H2S, HCl and other acids, heavy metals, and tars. The gas requires cleaning before it is introduced in the engine or boiler. Most of these processes generate significant concentration of tars. The tars can vary from very low molecular weight to large and complex chains.
By Macrotek Inc. based in Markham, ONTARIO (CANADA).
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