Petter Mandt
Norbrygg-medlem
Moderatorkommentar: Denne diskusjonen begynte på tråden for dumme spørsmål, men den trenger absolutt en egen tråd.
(Droppa promptet mitt, så dere slipper lese hele den teksten. Tror dette skal stemme, men tar gjerne innspill):
1. Kerrigan (Irish Moss, SuperMoss, Whirlfloc, etc.) – Used in the Boil
• Function: These are kettle finings, primarily made from red seaweed (e.g., Chondrus crispus) and contain carrageenan, which is a negatively charged polysaccharide.
• Mechanism: During the last 10–15 minutes of the boil, carrageenan interacts with positively charged proteins in the wort. This causes them to precipitate out as large flocs that settle more easily.
• Main target: Haze-forming proteins (especially those that would otherwise form chill haze later).
Note: If you forget to add it, you’re missing the first major chance to remove haze-forming proteins. Post-fermentation clarification agents can help, but not as efficiently, and sometimes with side effects.
2. Clarex (Also sold as Brewer’s Clarex® by DSM) – Post-Fermentation
• Function: Prevents chill haze by enzymatically degrading haze-active proteins.
• Active ingredient: Prolyl Endopeptidase (PEP) — an enzyme.
• Mechanism: It targets and cleaves proline-rich polypeptides in beer. These peptides are responsible for haze formation when they interact with polyphenols, especially at low temperatures.
• Usage: Added post-fermentation, often before filtration or packaging. It works well even without chilling, unlike gelatin.
Does Clarex replace kettle finings if forgotten?
• Clarex doesn’t pull out proteins, it breaks down the ones responsible for haze. So it won’t clean up the trub or help settle out protein, but it will prevent chill haze and improve clarity long-term.
• It’s a preventive enzyme, not a fining in the traditional sense.
3. Gelatin – Post-Fermentation Fining
• Function: Binds and pulls down positively charged particles (mostly proteins and yeast).
• Mechanism: Gelatin carries a net negative charge at beer pH and binds with positively charged proteins and yeast, forming flocs that settle to the bottom.
• Effective temperature: Must be used at cold temperatures (1–4°C ideally). Why?
• Proteins need to aggregate (clump up) a bit at low temps for the gelatin to bind and settle them.
• If you use it warm, proteins stay in solution, and you’ll get chill haze later.
Gelatin at warm temps won’t prevent chill haze. Cold crashing first, then adding gelatin, then cold conditioning is the right order.
4. Charge-Based Fining (Positive vs. Negative)
You’re also right about electrostatic charges playing a role:
• Proteins and polyphenols are positively charged at beer pH (~4.2–4.6).
• Yeast cell walls can be negatively charged, depending on strain and condition.
• Fining agents work by being oppositely charged to what they target:
• Silica gel → targets proteins (negatively charged, attracts positive proteins).
• Isinglass (fish collagen) → targets yeast (positively charged, binds negatively charged yeast).
• PVPP → binds polyphenols (prevents protein-polyphenol haze formation).
• Gelatin → negatively charged → binds proteins and some yeast.
ChatGPTJeg bruker begge, dvs. jeg bruker Supermoss og Clarex, og jeg har sitti og nytt krystallklar pilsner i det fine sommerværet nå.
Clarex'en tar ut gluten - som du jo åpenbart er klar over - og det gjør ikke Whirlfloc (eller andre produkter med karragenan) så vidt jeg veit. Om det er overlappinger i hva de tar ut, veit jeg ikke, men karragenan påvirker ikke kjøletåke, som er det Clarex blei utvikla for å håndtere.
Clarex'en tar litt tid på seg når det gjelder å bli kvitt kjøletåka, men antakelig er effekten på gluten kjappere.
(Droppa promptet mitt, så dere slipper lese hele den teksten. Tror dette skal stemme, men tar gjerne innspill):
1. Kerrigan (Irish Moss, SuperMoss, Whirlfloc, etc.) – Used in the Boil
• Function: These are kettle finings, primarily made from red seaweed (e.g., Chondrus crispus) and contain carrageenan, which is a negatively charged polysaccharide.
• Mechanism: During the last 10–15 minutes of the boil, carrageenan interacts with positively charged proteins in the wort. This causes them to precipitate out as large flocs that settle more easily.
• Main target: Haze-forming proteins (especially those that would otherwise form chill haze later).
Note: If you forget to add it, you’re missing the first major chance to remove haze-forming proteins. Post-fermentation clarification agents can help, but not as efficiently, and sometimes with side effects.
2. Clarex (Also sold as Brewer’s Clarex® by DSM) – Post-Fermentation
• Function: Prevents chill haze by enzymatically degrading haze-active proteins.
• Active ingredient: Prolyl Endopeptidase (PEP) — an enzyme.
• Mechanism: It targets and cleaves proline-rich polypeptides in beer. These peptides are responsible for haze formation when they interact with polyphenols, especially at low temperatures.
• Usage: Added post-fermentation, often before filtration or packaging. It works well even without chilling, unlike gelatin.
Does Clarex replace kettle finings if forgotten?
• Clarex doesn’t pull out proteins, it breaks down the ones responsible for haze. So it won’t clean up the trub or help settle out protein, but it will prevent chill haze and improve clarity long-term.
• It’s a preventive enzyme, not a fining in the traditional sense.
3. Gelatin – Post-Fermentation Fining
• Function: Binds and pulls down positively charged particles (mostly proteins and yeast).
• Mechanism: Gelatin carries a net negative charge at beer pH and binds with positively charged proteins and yeast, forming flocs that settle to the bottom.
• Effective temperature: Must be used at cold temperatures (1–4°C ideally). Why?
• Proteins need to aggregate (clump up) a bit at low temps for the gelatin to bind and settle them.
• If you use it warm, proteins stay in solution, and you’ll get chill haze later.
Gelatin at warm temps won’t prevent chill haze. Cold crashing first, then adding gelatin, then cold conditioning is the right order.
4. Charge-Based Fining (Positive vs. Negative)
You’re also right about electrostatic charges playing a role:
• Proteins and polyphenols are positively charged at beer pH (~4.2–4.6).
• Yeast cell walls can be negatively charged, depending on strain and condition.
• Fining agents work by being oppositely charged to what they target:
• Silica gel → targets proteins (negatively charged, attracts positive proteins).
• Isinglass (fish collagen) → targets yeast (positively charged, binds negatively charged yeast).
• PVPP → binds polyphenols (prevents protein-polyphenol haze formation).
• Gelatin → negatively charged → binds proteins and some yeast.
Sist redigert av en moderator: