Proper design of the air handling equipment in a grain drying system is necessary to successfully dry and store grain Even a large fan may not provide the required airflow if the system is not sized correctly In part 1 of this video the basics of static pressure are demonstrated and explained how they affect grain drying Read More World's Best PowerPoint Templates - CrystalGraphics offers more PowerPoint templates than anyone else in the world with over 4 million to choose from Winner of the Standing Ovation Award for "Best PowerPoint Templates" from Presentations Magazine They'll give your presentations a professional memorable appearance - the kind of sophisticated look that

Principle And Process of Lyophilization

Slide 16: The intersection of the lines at point b is the eutectic point which for sodium chloride is -21 5C The eutectic temperature is important in freeze drying because it represents the maximum allowable product temperature during primary drying If product temperature exceeds the eutectic temperature while ice is still present drying takes place from the liquid state

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Drying food using the sun and wind to prevent spoilage has been known since ancient times Water is usually removed by evaporation (air drying sun drying smoking or wind drying) but in the case of freeze-drying food is first frozen and then water is removed by sublimation 5

Freezing in food processing method of preserving food by lowering the temperature to inhibit microorganism growth The method has been used for centuries in cold regions and a patent was issued in Britain as early as 1842 for freezing food by immersion in an ice and salt brine

Sep 29 2015The origins of freeze drying can be traced back to the 15th century where a rudimentary form of freeze drying was used by the Incas Their crops were stored on the mountain heights above Machu Picchu where the cold mountain temperatures froze their food stores and the water inside slowly vaporized under the low air pressure of the high mountain

Which freezing method is best?

Immersion or spray freezing (cryogenic freezing) – the product is either directly immersed in a liquid refrigerant or sprayed with it which leads to a process of sudden very gentle freezing Liquid nitrogen (-196 C) or a mixture of dry ice and ethanol is usually used as the refrigerant

Freeze drying ppt 1 -: Presented by :- Monika K Tambakhe Dr P A Pawar University Department of Chemical Technology Sant Gadge baba Amravati University Amravati Maaharashtra INDIA 444602 Email id-mk2tambakhegmil papawar40rediffmail 2 INTRODUCTION Freeze drying is a relatively recent method of preserving food

heat In the special case of freeze drying which takes place below the triple point of the liquid being removed drying occurs by sublimation of the solid phase directly into the vapor phase This definition thus excludes conversion of a liquid phase into a concentrated liquid phase (evaporation) mechanical dewatering operations such as

Sep 29 2015The origins of freeze drying can be traced back to the 15th century where a rudimentary form of freeze drying was used by the Incas Their crops were stored on the mountain heights above Machu Picchu where the cold mountain temperatures froze their food stores and the water inside slowly vaporized under the low air pressure of the high mountain

Food preservation any of a number of methods by which food is kept from spoilage after harvest or slaughter Such practices date to prehistoric times Some of the oldest preservation methods include drying and refrigeration Modern methods are more sophisticated Learn about the importance and methods of preservation

Immersion or spray freezing (cryogenic freezing) – the product is either directly immersed in a liquid refrigerant or sprayed with it which leads to a process of sudden very gentle freezing Liquid nitrogen (-196 C) or a mixture of dry ice and ethanol is usually used as the refrigerant

Freeze-drying: Freeze-drying or lyophilization is the most preferred method for drying and formulation of a wide-range of products—pharmaceuticals foodstuffs diagnostics bacteria viruses This is mainly because freeze-drying usually does not cause loss of biological activity of the desired product

Thermal expansion properties of the glass container (freeze-drying) evaluation of glass containers slideshare glass as packaging material ppt evaluation of glass containers ppt type 2 glass example types of glass containers used in pharmaceuticals ppt disadvantages of glass containers for parenteral preparation type 2 glass uses

Lyophilization 1

May 26 2017CONCLUSION A freeze dried product with the best attributes and quality In freeze drying minimal structural changes or shrinkage In freeze drying process nutrients are largely retained Freeze drying system includes vacuum and refrigeration equipments The initial costs are relatively high up to 4 times than conventional drying

Sun drying is the simplest and cheapest method of drying It is used for high volume foods such as grain rice sultanas and raisins The disadvantage of sun drying is that the processor has very little control over the drying conditions and the quality of the dried fruit There are two main forms of dried fruit- semi-moist and dried fruits

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Freeze drying is the removal of ice or other frozen solvents from a material through the process of sublimation and the removal of bound water molecules through the process of desorption Lyophilization and freeze drying are terms that are used interchangeably depending on the industry and location where the drying is taking place

Atmospheric Freeze Drying AFD: quality Standard batch freeze dryer Vacuum (17 mbar 1700 Pa) Condenser/plate heating AFD: atmospheric very dry air (favourable no oxygen) heating by mild temp air and 1g water/kg gas frozen start material Optimising drying and final product quality Programmed drying in time

PowerPoint Presentation: The liquid solvent is removed by evaporation under reduced pressure or by freeze drying which results in amorphous precipitation of guest in a crystalline carrier The basic difference between the solid solutions/eutectics is that the drug is precipitated out in an amorphous form in the former as opposed to crystalline