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Industrial production of instant tea powder, the best technology and process parameters of route

Author: CuiJiLai
Tutor: GongZhengLi
School: Southwestern University
Course: Tea Science
Keywords: Instant tea powder Extraction Concentrate Yield
CLC: TS272.59
Type: Master's thesis
Year: 2011
Downloads: 246
Quote: 0
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Abstract


Instant tea is known as the national drink of the traditional form of deep processing of tea, its convenient, nutritional, delicious, healthy characterized by a growing number of consumer acceptance and love. Instant tea is generally used instant tea powder blend, thus producing instant tea instant tea powder is a key raw material. Our country is the largest producer of instant tea powder, instant tea production but there are too low, the aroma is light, cold insoluble problems such as poor, which restricts the further development of instant tea industry. Therefore, how to solve the production of instant tea powder have low rates of instant tea industry has become placed in front of an urgent problem. This paper summarizes previous work, based on the first instant tea yield extraction process affecting the most critical are tested to extract the main factors affecting the extraction temperature, extraction time and solid-liquid ratio to inspect conditions in the pilot single factor experiment and quadratic regression orthogonal rotation test, trial closer to industrial conditions, making a conclusion more in line with the actual situation and the response surface analysis methods to analyze the test results and concluded as follows: extraction temperature, extraction time, the liquid material impact on yield than instant tea are extremely significant, affecting the yield of the key factors of instant tea. The optimum extraction extraction process parameter combinations as follows: extraction temperature 83 ℃, extraction time 74min, liquid ratio of 20:1. On this basis, to obtain the mathematical model of instant tea yield: extraction ratio = 26.1 0.67A 0.58B 0.87C-0.012AB 0.063AC 0.013BC-0.71A2-0.46B2-0.74C2 (A, B, C respectively represent the extraction temperature , extraction time, liquid ratio), under the above conditions, forecast model result is 26.7%, 26.5%, and the actual yield is only 0.2 percentage point gap, indicating predictive model has better predictability. In addition, the article also affect the yield and quality of instant tea powder concentrates were analyzed key aspects to compare two different enrichment process for instant tea powder, yield and quality. The results showed that: the scraper concentrated instant tea powder and high yield of the membrane concentration process, but physical and chemical composition analysis showed that the concentrate produced using membrane instant tea powder content than the active ingredient concentrate produced using the scraper instant tea powder and sensory evaluation of the results also show that the production of instant tea powder membrane concentration of better quality. In summary, the instant tea enrichment process, the membrane concentration of the blade concentrate better, membrane concentration, lower temperature during operation to retain more concentrated solution of the active ingredient, but the product was less than the blade concentrated. So, what kind of concentrated way, should be based on product quality requirements, production costs and production efficiency may be.

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CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > Beverage cold manufacturing industry > Tea > A variety of tea > Other
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