{"id":675163,"date":"2024-07-19T18:34:32","date_gmt":"2024-07-19T17:34:32","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=675163"},"modified":"2024-07-19T18:34:32","modified_gmt":"2024-07-19T17:34:32","slug":"anh-huong-cua-nhiet-do-den-qua-trinh-len-men","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/anh-huong-cua-nhiet-do-den-qua-trinh-len-men\/","title":{"rendered":"\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn qu\u00e1 tr\u00ecnh l\u00ean men"},"content":{"rendered":"<p class=\"sidekick\">\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn qu\u00e1 tr\u00ecnh l\u00ean men: t\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u01b0u h\u00f3a hay c\u1ea3n tr\u1edf qu\u00e1 tr\u00ecnh l\u00ean men trong s\u1ea3n xu\u1ea5t th\u1ef1c ph\u1ea9m v\u00e0 \u0111\u1ed3 u\u1ed1ng.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/anh_huong_cua_nhiet_do_den_qua_trinh_len_men.png\" alt=\"\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn qu\u00e1 tr\u00ecnh l\u00ean men\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn qu\u00e1 tr\u00ecnh l\u00ean men<\/h2>\n<p>Qu\u00e1 tr\u00ecnh l\u00ean men l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p quan tr\u1ecdng \u0111\u1ec3 t\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m nh\u01b0 bia, r\u01b0\u1ee3u, v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i th\u1ef1c ph\u1ea9m. Nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3ng vai tr\u00f2 c\u1ef1c k\u1ef3 quan tr\u1ecdng trong ki\u1ec3m so\u00e1t v\u00e0 \u0111i\u1ec1u ch\u1ec9nh qu\u00e1 tr\u00ecnh n\u00e0y. Hi\u1ec3u r\u00f5 c\u00e1ch nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 l\u00ean men gi\u00fap t\u1ed1i \u01b0u h\u00f3a \u0111i\u1ec1u ki\u1ec7n s\u1ea3n xu\u1ea5t, n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m.<\/p>\n<h2>T\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n c\u1ee7a vi sinh v\u1eadt<\/h2>\n<p>C\u00e1c vi sinh v\u1eadt nh\u01b0 n\u1ea5m men v\u00e0 vi khu\u1ea9n tham gia v\u00e0o qu\u00e1 tr\u00ecnh l\u00ean men. Nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n v\u00e0 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nh\u1eefng vi sinh v\u1eadt n\u00e0y. \u1ede m\u1ee9c nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u01b0u, vi sinh v\u1eadt ho\u1ea1t \u0111\u1ed9ng m\u1ea1nh m\u1ebd v\u00e0 hi\u1ec7u qu\u1ea3 nh\u1ea5t. Tuy nhi\u00ean, m\u1ed7i lo\u1ea1i vi sinh v\u1eadt c\u00f3 m\u1ee9c nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u01b0u kh\u00e1c nhau:<\/p>\n<p><u1><\/p>\n<li>\u0110\u1ed1i v\u1edbi n\u1ea5m men Saccharomyces cerevisiae (th\u01b0\u1eddng d\u00f9ng trong s\u1ea3n xu\u1ea5t bia v\u00e0 r\u01b0\u1ee3u): 15\u00b0C &#8211; 25\u00b0C l\u00e0 kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u01b0u.<\/li>\n<li>V\u1edbi vi khu\u1ea9n lactic (d\u00f9ng trong s\u1ea3n xu\u1ea5t s\u1eefa chua): 30\u00b0C &#8211; 40\u00b0C l\u00e0 kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u01b0u.<\/li>\n<p><\/u1><\/p>\n<h2>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 s\u1ea3n xu\u1ea5t enzyme<\/h2>\n<p>Enzyme c\u0169ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec7t \u0111\u1ed9. Enzyme l\u00e0 c\u00e1c prote\u00ednas ho\u1ea1t \u0111\u1ed9ng nh\u01b0 ch\u1ea5t x\u00fac t\u00e1c trong qu\u00e1 tr\u00ecnh l\u00ean men. N\u1ebfu nhi\u1ec7t \u0111\u1ed9 qu\u00e1 th\u1ea5p, enzyme ho\u1ea1t \u0111\u1ed9ng ch\u1eadm, gi\u1ea3m hi\u1ec7u su\u1ea5t l\u00ean men. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao, enzyme c\u00f3 th\u1ec3 b\u1ecb bi\u1ebfn t\u00ednh (m\u1ea5t ch\u1ee9c n\u0103ng), g\u00e2y h\u1ecfng qu\u00e1 tr\u00ecnh l\u00ean men.<\/p>\n<p>C\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t \u0111\u1ec3 bi\u1ec3u di\u1ec5n m\u1ed1i quan h\u1ec7 gi\u1eefa t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng enzyme v\u00e0 nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng d\u00f9ng l\u00e0:<\/p>\n<p>V(T) = V_max * (T-T_min) \/ ((T_opt-T) + (T &#8211; T_min))<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><o1><\/p>\n<li>V(T) l\u00e0 t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng t\u1ea1i nhi\u1ec7t \u0111\u1ed9 T.<\/li>\n<li>V_max l\u00e0 t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng t\u1ed1i \u0111a.<\/li>\n<li>T_min, T_opt l\u1ea7n l\u01b0\u1ee3t l\u00e0 nhi\u1ec7t \u0111\u1ed9 t\u1ed1i thi\u1ec3u v\u00e0 t\u1ed1i \u01b0u cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a enzyme.<\/li>\n<p><\/o1><\/p>\n<h2>Thay \u0111\u1ed5i s\u1ea3n ph\u1ea9m l\u00ean men<\/h2>\n<p>Nhi\u1ec7t \u0111\u1ed9 c\u00f2n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng c\u1ee7a qu\u00e1 tr\u00ecnh l\u00ean men. \u1ede nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, vi sinh v\u1eadt s\u1ebd t\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m ph\u1ee5 kh\u00e1c nhau, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u01b0\u01a1ng v\u1ecb, m\u00e0u s\u1eafc v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n<p><u1><\/p>\n<li>Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p: Th\u01b0\u1eddng t\u1ea1o ra s\u1ea3n ph\u1ea9m c\u00f3 h\u01b0\u01a1ng v\u1ecb nh\u1eb9 h\u01a1n, \u00edt m\u00f9i h\u1eafc.<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n: C\u00f3 th\u1ec3 sinh ra nhi\u1ec1u axit v\u00e0 c\u1ed3n h\u01a1n, d\u1eabn \u0111\u1ebfn h\u01b0\u01a1ng v\u1ecb m\u1ea1nh h\u01a1n.<\/li>\n<p><\/u1><\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh l\u00ean men. Nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n c\u1ee7a vi sinh v\u1eadt, ho\u1ea1t \u0111\u1ed9ng c\u1ee7a enzyme v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng. Hi\u1ec3u v\u00e0 t\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t \u0111\u1ed9 gi\u00fap n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1ea3n xu\u1ea5t v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m l\u00ean men.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn qu\u00e1 tr\u00ecnh l\u00ean men: t\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u01b0u h\u00f3a hay c\u1ea3n tr\u1edf qu\u00e1 tr\u00ecnh l\u00ean men trong s\u1ea3n xu\u1ea5t th\u1ef1c ph\u1ea9m v\u00e0 \u0111\u1ed3 u\u1ed1ng.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn qu\u00e1 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