knowelge check

Storage Practices of Grain and Malt

  • Main Goal: Maintain dry conditions for grain storage to ensure the driability and moisture content of malt.

  • Cleaning Requirements:

    • Regular cleaning of silos, mills, and grist cases is necessary.
    • Contract cleaners are typically used to vacuum dust and fumigate silos to control insect populations.

  • Organic Soil Loads:

    • Organic materials (grains and others) should be minimized during the mashing process.
    • High organic soil loads can result in:
    • Slower runoff
    • Inadequate grist hydration
    • Incomplete extraction

Sanitation and Cleaning

  • Focus Areas:

    • Sanitation should prioritize plate heat exchangers and wort lines due to their critical role in preventing contamination.
    • The cleaning of these areas is essential to avoid compromise in the brewing process.

  • Cleaning Frequency:

    • Heat exchangers and wort lines should be cleaned at minimum during each changeover between batches.
    • Daily cleaning is recommended when brewing multiple batches, especially in large formation vessels.

  • Documentation:

    • A standard operating procedure (SOP) should be established and documented for cleaning and sanitation processes.
    • This SOP should be linked to the brewery’s Hazard Analysis and Critical Control Points (HACCP) to ensure structured review and training.

Chemicals and Their Usage

  • Chlorine-Based Chemicals:

    • Chlorine is effective for kettles but can corrode stainless steel; caution is essential.
    • Proper concentrations should be used to minimize corrosion risk while still achieving effective cleaning.

  • Protection Against Fouling:

    • Heat exchange surfaces can accumulate proteins and carbohydrates leading to fouling if not maintained.
    • Careful cleaning is required to remove carbonized materials from extreme heat areas.

  • CIP Applications:

    • Vitaphores are fast-acting sanitizers; however, they are not suitable for Cleaning In Place (CIP) due to staining potential at higher concentrations.

Addressing Accidental Contamination

  • Accidental Injection of Chemicals/Wort:
    • Any accidental injection into Hot Liquor Tanks (HLT) must be addressed immediately through draining, cleaning, and sanitization.

Understanding Mechanical Action in Cleaning

  • Enhancing Cleaning Efficiency:
    • High mechanical action achieved through:
    • High flow rates (6-12 liters per minute or 2-3 gallons per minute)
    • Turbulent flow for effective cleaning in process piping.

Regularity of Sanitation

  • Equipment Not Requiring Regular Sanitation:

    • Mash tuns and kettles do not need to be fully cleaned after each cycle but should still undergo frequent sanitation to mitigate contamination risks.
    • The immediate process of boiling wort helps sterilize and eliminate microorganisms.

  • This balanced approach helps in maintaining equipment integrity and product quality throughout the brewing process.