{"id":900375,"date":"2026-08-19T15:35:01","date_gmt":"2026-08-19T13:35:01","guid":{"rendered":"https:\/\/www.flavouredspirits.com\/jak-se-vyhnout-nekontrolovanemu-druhotnemu-kvaseni-ovocneho-piva\/"},"modified":"2026-08-24T16:22:56","modified_gmt":"2026-08-24T14:22:56","slug":"jak-se-vyhnout-nekontrolovanemu-druhotnemu-kvaseni-ovocneho-piva","status":"publish","type":"post","link":"https:\/\/www.flavouredspirits.com\/cs\/jak-se-vyhnout-nekontrolovanemu-druhotnemu-kvaseni-ovocneho-piva\/","title":{"rendered":"Jak se vyhnout nekontrolovan\u00e9mu druhotn\u00e9mu kva\u0161en\u00ed ovocn\u00e9ho piva?"},"content":{"rendered":"\n

P\u0159id\u00e1n\u00ed ovoce m\u016f\u017ee zcela zm\u011bnit charakter piva. Vn\u00e1\u0161\u00ed sv\u011b\u017e\u00ed kyselost, p\u0159\u00edrodn\u00ed aroma, barvu a dal\u0161\u00ed chu\u0165ovou vrstvu. Z\u00e1rove\u0148 se spolu se \u0161\u0165\u00e1vou, protlakem nebo koncentr\u00e1tem dost\u00e1vaj\u00ed do piva cukry, kter\u00e9 mohou b\u00fdt vyu\u017eity kvasinkami.
Pokud proces nen\u00ed spr\u00e1vn\u011b napl\u00e1nov\u00e1n, m\u016f\u017ee po sto\u010den\u00ed doj\u00edt k druhotn\u00e9mu kva\u0161en\u00ed. D\u016fsledkem toho b\u00fdv\u00e1 nadm\u011brn\u00e9 nasycen\u00ed, zm\u011bna chuti, zakalen\u00ed, p\u0159etlakov\u00e1n\u00ed obal\u016f a v krajn\u00edch p\u0159\u00edpadech tak\u00e9 po\u0161kozen\u00ed lahv\u00ed nebo plechovek.<\/p>\n\n\n\n

\"Jak<\/figure>\n\n\n\n

Co je to nekontrolovan\u00e9 druhotn\u00e9 kva\u0161en\u00ed v ovocn\u00fdch pivech?<\/h2>\n\n\n\n

Nekontrolovan\u00e9 druhotn\u00e9 kva\u0161en\u00ed je op\u011btovn\u00e9 spu\u0161t\u011bn\u00ed aktivity kvasinek po ukon\u010den\u00ed hlavn\u00edho kva\u0161en\u00ed, nej\u010dast\u011bji po p\u0159id\u00e1n\u00ed suroviny obsahuj\u00edc\u00ed zkvasiteln\u00e9 cukry.<\/p>\n\n\n\n

V p\u0159\u00edpad\u011b ovocn\u00fdch piv m\u016f\u017ee b\u00fdt zdrojem takov\u00fdch cukr\u016f \u0161\u0165\u00e1va, pulpa, pyr\u00e9 nebo ovocn\u00fd koncentr\u00e1t. Sachar\u00f3za, gluk\u00f3za a frukt\u00f3za jsou snadno zkvasiteln\u00e9 v\u011bt\u0161inou pivovarsk\u00fdch kvasinek. Pokud v hotov\u00e9m pivu z\u016fst\u00e1vaj\u00ed aktivn\u00ed bu\u0148ky, mohou po p\u0159id\u00e1n\u00ed ovoce spustit dal\u0161\u00ed kva\u0161en\u00ed.<\/p>\n\n\n\n

Tento proces m\u016f\u017ee za\u010d\u00edt je\u0161t\u011b v tanku, b\u011bhem le\u017een\u00ed nebo ji\u017e ve spot\u0159ebitelsk\u00e9m obalu. Zvl\u00e1\u0161t\u011b nebezpe\u010dn\u00e1 je situace, kdy je pivo st\u00e1\u010deno p\u0159ed dosa\u017een\u00edm pln\u00e9ho pl\u00e1novan\u00e9ho prokva\u0161en\u00ed. <\/p>\n\n\n\n

Jak\u00e9 jsou p\u0159\u00ed\u010diny nekontrolovan\u00e9ho druhotn\u00e9ho kva\u0161en\u00ed?<\/h2>\n\n\n\n

N\u00e1hl\u00e9 v\u00fdkyvy teploty<\/h3>\n\n\n\n

N\u00e1r\u016fst teploty s\u00e1m o sob\u011b nevytv\u00e1\u0159\u00ed nov\u00e9 cukry, ale m\u016f\u017ee v\u00fdrazn\u011b zrychlit aktivitu kvasinek, pokud se v pivu st\u00e1le nach\u00e1zej\u00ed zkvasiteln\u00e9 sacharidy.<\/p>\n\n\n\n

Pivo, kter\u00e9 z\u016fst\u00e1valo stabiln\u00ed v chlad\u00edrn\u011b, m\u016f\u017ee po p\u0159em\u00edst\u011bn\u00ed do teplej\u0161\u00edho skladu nebo b\u011bhem p\u0159epravy za\u010d\u00edt rychle zvy\u0161ovat nasycen\u00ed oxidem uhli\u010dit\u00fdm. Proto nelze p\u0159istupovat k n\u00edzk\u00e9 teplot\u011b jako k jedin\u00e9 metod\u011b zaji\u0161t\u011bn\u00ed bezpe\u010dnosti produktu. Chlazen\u00ed zpomaluje metabolismus kvasinek, ale neodstra\u0148uje je a zpravidla je trvale nedeaktivuje.<\/p>\n\n\n\n

P\u0159ed\u010dasn\u00e9 lahvov\u00e1n\u00ed<\/h3>\n\n\n\n

Jednou z nej\u010dast\u011bj\u0161\u00edch p\u0159\u00ed\u010din probl\u00e9m\u016f je st\u00e1\u010den\u00ed p\u0159ed ukon\u010den\u00edm kva\u0161en\u00ed. Jedno zm\u011b\u0159en\u00ed extraktu je\u0161t\u011b nepotvrzuje stabilitu piva. V\u00fdsledek mus\u00ed b\u00fdt ov\u011b\u0159en i v n\u00e1sleduj\u00edc\u00edch dnech (min. 3 dny po sob\u011b), p\u0159i zachov\u00e1n\u00ed srovnateln\u00e9 teploty vzorku a stejn\u00e9 m\u011b\u0159ic\u00ed metody.<\/p>\n\n\n\n

Je t\u0159eba tak\u00e9 zohlednit cukry vn\u00e1\u0161en\u00e9 spolu s ovocem. Samotn\u00e9 ukon\u010den\u00ed kva\u0161en\u00ed z\u00e1kladn\u00edho piva neznamen\u00e1, \u017ee produkt bude stabiln\u00ed po p\u0159id\u00e1n\u00ed koncentr\u00e1tu.<\/p>\n\n\n\n

Pokud se ovoce p\u0159id\u00e1v\u00e1 p\u0159\u00edmo p\u0159ed st\u00e1\u010den\u00edm, jeho vliv na potenci\u00e1ln\u00ed druhotn\u00e9 kva\u0161en\u00ed mus\u00ed b\u00fdt posouzen je\u0161t\u011b ve f\u00e1zi technologick\u00fdch zkou\u0161ek.<\/p>\n\n\n\n

Hop creep<\/h3>\n\n\n\n

Hop creep se t\u00fdk\u00e1 p\u0159edev\u0161\u00edm piv intenzivn\u011b chmelen\u00fdch za studena. Enzymy p\u0159\u00edtomn\u00e9 v chmelu mohou rozkl\u00e1dat \u010d\u00e1st slo\u017eit\u011bj\u0161\u00edch sacharid\u016f na cukry, kter\u00e9 se n\u00e1sledn\u011b st\u00e1vaj\u00ed dostupn\u00fdmi pro kvasinky.<\/p>\n\n\n\n

U ovocn\u00e9ho piva se mohou jednotliv\u00e9 rizikov\u00e9 faktory kumulovat. Na jedn\u00e9 stran\u011b se vyskytuj\u00ed cukry poch\u00e1zej\u00edc\u00ed z ovoce, na druh\u00e9 dodate\u010dn\u00e1 kvasitelnost vyvolan\u00e1 chmelov\u00fdmi enzymy. Proto by u piv spojuj\u00edc\u00edch dry hopping s p\u0159id\u00e1n\u00edm ovoce m\u011bla b\u00fdt stabilita extraktu kontrolov\u00e1na zvl\u00e1\u0161t\u011b pe\u010dliv\u011b.<\/p>\n\n\n\n

\u010cistota za\u0159\u00edzen\u00ed<\/h3>\n\n\n\n

Druhotn\u00e9 kva\u0161en\u00ed nen\u00ed v\u017edy v\u00fdsledkem p\u016fsoben\u00ed kvasinek pou\u017eit\u00fdch pro hlavn\u00ed kva\u0161en\u00ed. P\u0159\u00ed\u010dinou mohou b\u00fdt tak\u00e9 divok\u00e9 kvasinky nebo bakterie, kter\u00e9 se dostaly do produktu p\u0159es nedostate\u010dn\u011b umyt\u00fd tank, potrub\u00ed, \u010derpadlo, ventil nebo kohouty.<\/p>\n\n\n\n

N\u011bkter\u00e9 mikroorganismy dok\u00e1\u017eou vyu\u017e\u00edvat slou\u010deniny, kter\u00e9 nekvas\u00ed standardn\u00ed pivovarsk\u00e9 kmeny. V d\u016fsledku toho m\u016f\u017ee pivo po jistou dobu vypadat jako stabiln\u00ed a n\u00e1sledn\u011b za\u010d\u00edt m\u011bnit chu\u0165, aroma a \u00farove\u0148 nasycen\u00ed oxidem uhli\u010dit\u00fdm.<\/p>\n\n\n\n

Zvl\u00e1\u0161tn\u00ed pozornost je t\u0159eba v\u011bnovat t\u011b\u017eko \u010distiteln\u00fdm m\u00edst\u016fm: t\u011bsn\u011bn\u00edm, hrdl\u016fm, vzorkovac\u00edm ventil\u016fm, plnic\u00edm hlav\u00e1m a instalac\u00edm pou\u017e\u00edvan\u00fdm k d\u00e1vkov\u00e1n\u00ed ovocn\u00fdch surovin.<\/p>\n\n\n\n

\n
\"Osv\u011bd\u010den\u00e9<\/figure>\n<\/figure>\n\n\n\n

Osv\u011bd\u010den\u00e9 zp\u016fsoby, jak se vyhnout druhotn\u00e9mu kva\u0161en\u00ed v ovocn\u00fdch pivech<\/h2>\n\n\n\n

Metoda 1: napl\u00e1nov\u00e1n\u00ed momentu dod\u00e1n\u00ed ovoce<\/h3>\n\n\n\n

Nejjednodu\u0161\u0161\u00edm zp\u016fsobem omezen\u00ed rizika je p\u0159id\u00e1n\u00ed ovoce dostate\u010dn\u011b v\u010das, tak aby kvasinky mohly prokvasit vnesen\u00e9 cukry je\u0161t\u011b v tanku.<\/p>\n\n\n\n

Toto \u0159e\u0161en\u00ed se osv\u011bd\u010duje, kdy\u017e je c\u00edlem such\u00e9 pivo a v\u00fdrobce akceptuje \u010d\u00e1ste\u010dnou ztr\u00e1tu nejt\u011bkav\u011bj\u0161\u00edch ovocn\u00fdch t\u00f3n\u016f. Intenzivn\u00ed kva\u0161en\u00ed m\u016f\u017ee omezit sv\u011b\u017eest aromatu, proto je t\u0159eba term\u00edn p\u0159id\u00e1n\u00ed vyb\u00edrat podle druhu ovoce a o\u010dek\u00e1van\u00e9ho profilu produktu.<\/p>\n\n\n\n

Je vhodn\u00e9 zn\u00e1t extrakt suroviny a jej\u00ed pl\u00e1novan\u00e9 d\u00e1vkov\u00e1n\u00ed. Kvalitn\u00ed ovocn\u00e9 koncentr\u00e1ty do piva<\/a> by m\u011bly m\u00edt opakovateln\u00e9 parametry, co\u017e usnad\u0148uje v\u00fdpo\u010det mno\u017estv\u00ed cukr\u016f dost\u00e1vaj\u00edc\u00edch se do ka\u017ed\u00e9 \u0161ar\u017ee.<\/p>\n\n\n\n

Metoda 2: potvrzen\u00ed stability p\u0159ed sto\u010den\u00edm<\/h3>\n\n\n\n

P\u0159ed balen\u00edm je t\u0159eba potvrdit, \u017ee kone\u010dn\u00fd extrakt se v \u010dase nem\u011bn\u00ed. M\u011b\u0159en\u00ed proveden\u00e9 dvakr\u00e1t nebo t\u0159ikr\u00e1t v po sob\u011b n\u00e1sleduj\u00edc\u00edch dnech d\u00e1v\u00e1 v\u00fdrazn\u011b v\u00edce informac\u00ed ne\u017e jedin\u00fd v\u00fdsledek.<\/p>\n\n\n\n

V pivovarech disponuj\u00edc\u00edch odpov\u00eddaj\u00edc\u00edm z\u00e1zem\u00edm m\u016f\u017ee pomoci test kva\u0161en\u00ed. Umo\u017e\u0148uje posoudit, zda v pivu nez\u016fstaly slou\u010deniny, kter\u00e9 kvasinky mohou je\u0161t\u011b vyu\u017e\u00edt.<\/p>\n\n\n\n

Kontrola by se nem\u011bla omezovat v\u00fdhradn\u011b na extrakt. Je vhodn\u00e9 sledovat tak\u00e9 tlak, \u00farove\u0148 oxidu uhli\u010dit\u00e9ho, pH, v\u016fni a chu\u0165 vzorku a jeho chov\u00e1n\u00ed po uchov\u00e1n\u00ed ve vy\u0161\u0161\u00ed teplot\u011b.<\/p>\n\n\n\n

Metoda 3: volba \u00fa\u010dinn\u00e9 metody stabilizace<\/h3>\n\n\n\n

Pokud si m\u00e1 produkt zachovat \u010d\u00e1st p\u0159\u00edrodn\u00ed ovocn\u00e9 sladkosti, samotn\u00e9 ukon\u010den\u00ed kva\u0161en\u00ed m\u016f\u017ee b\u00fdt nedostate\u010dn\u00e9. Podle mo\u017enost\u00ed z\u00e1vodu se pou\u017e\u00edv\u00e1 mimo jin\u00e9 filtrace omezuj\u00edc\u00ed po\u010det bun\u011bk kvasinek, pasterace, aseptick\u00e9 st\u00e1\u010den\u00ed nebo kombinace n\u011bkolika procesn\u00edch zaji\u0161t\u011bn\u00ed.<\/p>\n\n\n\n

Ka\u017ed\u00e1 z t\u011bchto metod m\u00e1 jin\u00e9 technick\u00e9 po\u017eadavky a m\u016f\u017ee ovliv\u0148ovat chu\u0165. P\u0159\u00edli\u0161 intenzivn\u00ed tepeln\u00e9 zpracov\u00e1n\u00ed m\u016f\u017ee oslabit sv\u011b\u017e\u00ed aroma ovoce, zat\u00edmco nedostate\u010dn\u00e1 filtrace nezajist\u00ed stabilitu, pokud v produktu z\u016fstanou \u017eiv\u00e9 bu\u0148ky.<\/p>\n\n\n\n

Metodu je t\u0159eba zvolit podle druhu piva, \u00farovn\u011b cukru, o\u010dek\u00e1van\u00e9 trvanlivosti a podm\u00ednek distribuce. Samotn\u00fd cold crash nelze pova\u017eovat za plnou mikrobiologickou stabilizaci.<\/p>\n\n\n\n

Na co je t\u0159eba d\u00e1t pozor pro zamezen\u00ed druhotn\u00e9mu kva\u0161en\u00ed piva?<\/h2>\n\n\n\n

Velk\u00fd v\u00fdznam m\u00e1 kvalita a opakovatelnost ovocn\u00e9 suroviny. P\u0159ed zaveden\u00edm receptury je vhodn\u00e9 zkontrolovat extrakt, kyselost, pH, senzorick\u00fd profil a chov\u00e1n\u00ed koncentr\u00e1tu po sm\u00edch\u00e1n\u00ed s konkr\u00e9tn\u00edm z\u00e1kladn\u00edm pivem. Poradit mohou rovn\u011b\u017e materi\u00e1ly vysv\u011btluj\u00edc\u00ed, jakou \u0161\u0165\u00e1vu do ovocn\u00e9ho piva vybrat.<\/p>\n\n\n\n

Je t\u0159eba tak\u00e9 zohlednit vliv ovoce na barvu a \u010dirost. Zm\u011bny prob\u00edhaj\u00edc\u00ed b\u011bhem skladov\u00e1n\u00ed mohou vypl\u00fdvat nejen z kva\u0161en\u00ed, ale tak\u00e9 z oxidace, reakce polyfenol\u016f a p\u0159irozen\u00e9 nestability pigment\u016f. V\u00edce informac\u00ed obsahuje \u010dl\u00e1nek o tom, jak ovocn\u00e9 koncentr\u00e1ty ovliv\u0148uj\u00ed vzhled piva.<\/p>\n\n\n\n

Hotov\u00e9 ovocn\u00e9 pivo by m\u011blo b\u00fdt skladov\u00e1no pokud mo\u017eno v chladu, ale stejn\u011b d\u016fle\u017eit\u00e9 je p\u0159edchoz\u00ed potvrzen\u00ed jeho stability. Kontrolovan\u00fd proces, p\u0159esn\u00e1 m\u011b\u0159en\u00ed a spr\u00e1vn\u00e1 hygiena jsou \u00fa\u010dinn\u011bj\u0161\u00edm zaji\u0161t\u011bn\u00edm ne\u017e spol\u00e9h\u00e1n\u00ed na to, \u017ee n\u00edzk\u00e1 teplota zastav\u00ed kvasinky po celou dobu trvanlivosti produktu.<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

P\u0159id\u00e1n\u00ed ovoce m\u016f\u017ee zcela zm\u011bnit charakter piva. Vn\u00e1\u0161\u00ed sv\u011b\u017e\u00ed kyselost, p\u0159\u00edrodn\u00ed aroma, barvu a dal\u0161\u00ed chu\u0165ovou vrstvu. Z\u00e1rove\u0148 se spolu…<\/p>\n","protected":false},"author":1,"featured_media":900330,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-900375","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bez-kategorii"],"acf":[],"yoast_head":"\nJak se vyhnout nekontrolovan\u00e9mu druhotn\u00e9mu kva\u0161en\u00ed ovocn\u00e9ho piva? | Flavouredspirits<\/title>\n<meta name=\"description\" content=\"Nekontrolovan\u00e9 zr\u00e1n\u00ed ovocn\u00fdch piv m\u016f\u017ee ovlivnit chu\u0165, perlivost a stabilitu produktu. 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