在线观看亚洲精品专区-在线观看亚洲免费-在线观看亚洲免费视频-在线观看亚洲欧美-欧美freexxx-欧美free嫩交video

食品伙伴網服務號
 
 
當前位置: 首頁 » 專業英語 » 專業知識 » 正文

What are the main problems in the production of apple juice concentrate - from a

放大字體  縮小字體 發布日期:2007-08-02
核心提示:Apple juice concentrate is prepared from clean, sound apples that have been washed and sorted prior to processing. Prior to juice extraction, apples are mashed and then depectinised to control viscosity. The juice undergoes filtration, assuring a pr

Apple juice concentrate is prepared from clean, sound apples that have been washed and sorted prior to processing. Prior to juice extraction, apples are mashed and then depectinised to control viscosity. The juice undergoes filtration, assuring a product of brilliant clarity. The filtered depectinised juice is concentrated through low temperature vacuum concentration processes to provide the highest quality product available. The resulting 70° brix concentrate is immediately chilled and packaged as specified. The apple juice concentrate is processed according to good manufacturing practices.

One of the problems encountered relates to optimisation of the mashing process. Mashing of apples is normally performed in two types of equipment: a grater or a hammer mill. One of the critical aspects of this step is to obtain a proper consistency for economical juice extraction; if the pulp contains large pieces, the yield of juice will be low, but the juice will be relatively free from suspended solids. On the other hand, if the pulp is too finely divided, pressing will be difficult, and the juice will include a high content of suspended solids. It is therefore important to use the right equipment to ensure that the right consistency is obtained.

Another problem encountered is the laborious nature of the extraction step and low yields, coupled with large amounts of suspended solids in the juice. Traditionally, the techniques used are hydraulic pressing, pneumatic pressing and continuous pressing (screw and belt). These techniques also have an additional problem with regard to the difficulty to clean and maintain the equipment and the limited opportunity for expansion. On the other hand, hazes that form in apple juice during storage are one of the more bothersome and expensive problems in the whole exercise of apple juice making. These hazes may be of biological and nonbiological origin. Biological hazes are not a real problem if sterilization is carried out properly. Tannin-protein type hazes, however, may pose a real problem, as tannins are in good supply in apple juices, and protein traces may appear through the use of enzymes and gelatin at the depectinisation stage. Tannin-protein particle growth may be avoided by using as little gelatin and enzyme as possible. Heating depectinised juice to 65-70°C and then cooling coagulates some protein that can be removed by filtration. The finer the final filtration, the fewer potential haze-forming particles will enter the bottle.

Optimisation of the process can be achieved by using centrifuges and a press aid during extraction to increase the yield, and the use of membrane processes, specifically ultrafiltration for clarification, in order to achieve increased juice recovery, enhanced product quality, cold sterilisation and minimum waste production

更多翻譯詳細信息請點擊:http://www.trans1.cn
 
關鍵詞: the and of to juice is in be The are will apple as
[ 網刊訂閱 ]  [ 專業英語搜索 ]  [ 加入收藏 ]  [ 告訴好友 ]  [ 打印本文 ]  [ 關閉窗口 ] [ 返回頂部 ]
分享:

 

 
推薦圖文
推薦專業英語
點擊排行
 
 
Processed in 2.958 second(s), 588 queries, Memory 2.53 M
51La
主站蜘蛛池模板: 日本在线www | 四虎影院最新网址 | 亚洲欧美在线观看 | 午夜视频h | 日本色黄 | avtt天堂网永久资源 | 一级毛片在播放免费 | 免费视频性 | 手机在线免费观看视频 | 看黄网站在线观看 | 99久久久精品免费观看国产 | 久久 在线播放 | 国内视频一区二区三区 | 欧美成人高清性色生活 | 全是肉的高h短篇列车 | 久久综合色区 | 中文字幕色综合久久 | 在线观看免费视频一区 | 亚洲成年人在线 | 538porm在线看国产亚洲 | 深爱激情婷婷 | a资源在线观看 | 一级毛片黄色片 | v视界影院最新地址 | 91视频看看| 拍拍拍成人免费高清视频 | aa1在线天堂 | 丁香婷婷亚洲六月综合色 | h视频免费在线 | 亚洲国产色婷婷精品综合在线观看 | 欧美色视频网 | 美女性爽视频国产免费 | 成人观看网站a | 国产欧美色图 | 色欧美综合 | 日本xxxx色视频在线观看免费 | 国产精品免费拍拍1000部 | www.999精品视频观看免费 | 天天网综合 | 亚洲成人激情电影 | 国产一级真人毛爱做毛片 |
微信二维码