Abstract
The elaborate content of spices poses problems of temperature rise and sieve clogging during scrape. Due to this temperature rise, spices meet a significant fraction of their vapourisable oil or chooseing components. Therefore, a cryogenic grinding system was designed and develop to cool the spices before feeding to the grinder and also keep abreast the cryogenic temperature in the grinding zone. The main components of the cryogenic grinding system are a precooler and grinder. The precooler consists of a screw conveyor assembly, a compressor, a liquid nitrogen dewar and power infection unit. The design considerations, calculations and development of the precooler have been discussed in the paper. A commercially available grinder was adopted for this purpose. The tests conducted on grinding of cumin seed seed revealed that it could be successfully ground below the temperature of ÿ70°C. Above this temperature, sieve clogging took place. The plus in grinding temperature from-160°C to-70°C resulted in a significant increase in particle size of it of the product and specific animation consumption in grinding. A variation in volatile oil content was obtained in the range of 3.30±3.
26 ml/ hundred g with increasing temperature from -160°C to -70°C, but this variation was nominate to be non-significant at 5% level.
process
Grinding of spices is an age-old technique like grinding of other food materials. The main capture of spice grinding is to obtain smaller particle size with good product quality in terms of favour and colour. In the normal grinding process, set off is generated when energy is utilize to fracture a particle into a smaller size. This generated heat usually is detrimental to the product and in some acquittance of favour and quality. The fat in spices generally poses extra problems and is an authorized consideration in grinding. During grinding, the Temperature of the product rises to a level in the range of 42±95°C , which varies...If you want to take in a full essay, order it on our website: Orderessay
If you want to get a full essay, wisit our page: write my essay .
No comments:
Post a Comment