LYCOS RETRIEVER 
Digestion: Materials
built 644 days ago
As mentioned above, thermophilic digestion systems are considered to be less stable... the increased temperatures facilitate faster reaction rates and hence faster gas yields. Operation at higher temperatures facilitates greater sterilisation of the end digestate. In countries where legislation, such as the Animal By-Products Regulations in the European Union, requires end products to meet certain levels of bacteria in the output material this may be a benefit.
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Ores, rock samples, glass and other inorganic materials can be dissolved rapidly in Parr acid digestion bombs using strong mineral acids: HF, HCI, H2SO4, HN03, Aqua Regia and others. Other chemicals and manufactured products can be leached or dissolved as well, all without introducing unwanted ions and with complete sample recovery. Using reaction temperatures well above normal boiling points, samples can be dissolved or digested rapidly for all types of chemical analyses, particularly for AA and ICP spectroscopy, and for other instrumental methods in which trace elements must be identified.
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For these two reasons a maturation or composting stage may be employed after digestion. Lignin and other materials are available for degradation by aerobic microorganisms such as fungi helping reduce the overall volume of the material for transport. During this maturation the ammonia will be broken down into nitrates, improving the fertility of the material and making it more suitable as a soil improver.
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High temperature rotor able to withstand extremely high temperatures for long lasting complete digestion of the most challenging samples. Suitable for very difficult inorganic materials such as silicon carbide, metal oxides, geological, and refractory materials.
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