Applied Sanitation in Home. Rick Theiner LOGIC, Inc.

Transcription

1 Applied Sanitation in Home Fermentation Hobbies Rick Theiner LOGIC, Inc.

2 What is LOGIC, Inc.? Longtime manufacturer of the two best cleansing and sanitizing products for homebrewers Founded and owned by a passionate homebrewer and professional chemist specializing in surfactant applications Dedicated to providing the most effective, environmentally friendly products on the market

3 The Logical Reach Headquarters Manufacturing/Distribution Private Label Customers Clients/Consulting Brewery/Winery Customers

4 Goals for Today Define the Battlefield Soils Substrates Understand the Principles of Cleaning Theory Physico-Chemical Interactions Discuss the Key Sites and Actions in Cleaning CCP s (Critical Control Points) Fermentation Management/ Controlled Infection Present the Specifics in Use Types of Products Out There

5 Some Definitions Cleaning: Removing Soil and/or Biofilm Sanitizing: Log 3 Reduction (99.9%) of Microorganisms in System Disinfection: Log 5 Reduction (99.999%) of Microorganisms in System Sterilizing: Complete Elimination of Life

6 What are You Cleaning? Glass Low energy surface Non-porous and generally uniform Metal High energy surface Electron surface density (likes positive charges) Plastic Med to very low energy surface May be porous and/or have micro-scratches

7 Organic Soils Lipids/fats, proteins, and carbohydrates Noncharged; tend to like low energy surfaces Scale Why Are You Cleaning? Mineral complex from water salts May tightly hold to metal surfaces; has limited affinity for glass or plastic Complex Soil Mineral complex suspended in organic soil Typically the most common soil in brewing Biofilm Planktonic bacteria aggregating under a polysaccharide cover Bacteria uses biopolymers to glue themselves to a surface

8 The Components of Clean Mechanical Action Chemical Action Time Temperature

9 Big Effects for Hobbyists Mechanical Action Chemical Action Time Temperature

10 Physico-Chemical Reactions Wetting Responsible for water getting between soils and substrates. Often called the peel-up effect. Deflocculation Performed action of alkali, silicates and agitation. Bulky solids are broken into smaller pieces and easily removed. Suspension Detergents, alkalies, and silicates hold particles in suspension to prevent redeposition and easier removal. Dissolution Water soluble soils such as sugars and starches are removed by water and the compounds that aid in this process. Emulsification Fats and oils are broken into small globules which are suspended in the washing solution. Performed by detergents and alkalies. Neutralization Much of the soil is acidic and alkaline wash componds removes it by altering its properties *Combining any of these leads to synergies in cleaning!

11 Using What We re Learning What basic rules should you follow? Where are your critical points? Should you vary your methods? What chemicals should you use? What equipment should you use?

12 Basic Rules Clean everything BEFORE you use it. And then sanitize. Even new equipment Clean everything AFTER you use it. Right after. Now. Bottles, too! Clean the premises, not just the equipment, regularly. Keep your working area free of clutter. Watch for pests (bacteria, mold, wild yeast, rodents, etc.), remove them, and prevent their return. Don t buy in bulk unless you re going to be using it! Deal with spent grains and pomace IMMEDIATELY.

13 Tools of the Trade Water Hose with a nozzle Jet Blaster (manual or faucet/hose mounted) Brushes (many) Long handled Bendable Soft for plastic, stiff for wood A Stand to drain Hoses, Bottles, Fermenters, Carboys

14 Generic Chemicals for Cleaning and Sanitation Type Dose Notes Chlorine Bleach 1 Tbsp/gal; 2 tsp/5 gal Difficult to rinse and may impart off-flavors and aromas; is deactivated by organic soil Citric Acid 3 Tbsp/gal Neutralizes alkalinity from other cleansers and helps to activate MBS Trisodium Phosphate 1 Tbsp/gal Effective against organic soils but can cause minerals to precipitate as scale Soda Ash 0.25c/gal Cheap no-frills cleaning compound Sodium Metabisulfite 3 Tbsp/gal Very good must treatment; it is really not a cleaning agent at all Sodium Hydroxide 1 tsp/5 gal Effective; very caustic; very hazardous and difficult to rinse. Contributes to scale. Ammonia 1.5 Tbsp/gal Difficult to rinse, but very effective on removing labels; stinks

15 Formulated Chemicals for Cleaning and Sanitation Type Dose Notes Straight-A, B-Brite, PBW 1-2 Tbsp/gal Alkaline products containing percarbonate; formulated specifically for this task One Step, Bio-San 1 Tbsp/gal Oxidizing agents that are acceptable in light-duty cleaning Chlorinated Cleaners 1 tsp/gal Effective cleansers that should not be used on wood or some plastics Iodophor 1 Tbsp/5 gal Sanitizer only; color is not as good an indicator of strength as is thought Star-San 1 oz/5 gal Effective sanitizer when clear, good acid rinse to prevent scale MBS/Citric Acid 8oz/1oz/gal Very effective sanitizer with some cleaning effects; strong SO 2 release may be hazardous to some people

16 Special Cases: Barrels There s no good way to deal with old barrels that have gone off Chemicals will either taint the wood or extract essence. Of course, the latter is preferable. But here are some ideas. Treat barrels right Don t let them dry out. Store with a MBS/citric acid solution (2 oz/2 oz/5 gal water) Clean the outside as well as the inside! Recover with percarbonate (1 Tbsp/gal), let sit 24 hours, rinse, then rinse with citric acid (0.5 tsp/gal).

17 Special Cases: Biofilms Such films are not easily seen by the naked eye Often responsible for house flavor Can slough off outer layers to maintain the colony integrity in the face of sanitation procedures Removal: Physical contact (scrubbing) is vital Recommended sanitizers are based on oxidizers, acid, or both (e.g. peracetic acid). Best solution don t let them get a foothold. Clean, clean, and clean. (And then sanitize.)

18 Thanks for Your Attention! Any questions?

19 Chemistry Slides In case the audience lets me geek out on the details

20 Chelants and Sequesterants Responsible for limiting formation of beer stone during the cleaning process, starting the process of dissolving beerstone, conditioning process water, and aiding in deflocculation and suspension or soils.

21 Surfactants Responsible for wetting surfaces, speeding dissolution, deflocculation, suspension, and emulsification. Some surfactants also aid sequestering/chelation, neutralization, and speed oxidation processes.