conclusion

Water Chemistry Adjustments for Brewing

Overview

  • Approach to adjusting brewing water based on personal experiences.

  • Focus on ensuring sufficient calcium for enzyme reactions and avoiding gushing due to calcium oxalate.

Step 1: Calcium Analysis

  • Sufficient Calcium: Aim for a minimum of 40 to 50 parts per million (PPM) calcium in brewing water.

  • Test Method: Use deionized water to conduct a mash with all malt to determine calcium contributions from the malt.

  • Malt Contributions:

    • Example: Light Pilsner malt contributes approximately 30 PPM calcium.

    • Resulting mash pH should be optimal for enzyme activity.

  • Many brewers opt for treatment by reverse osmosis (RO) water.

Step 2: Beer Style Consideration

  • Identify Beer Style: Types include pale ale, bock, light lager, and dark lager.

  • Based on the chosen style, determine necessary salts to achieve the desired water profile.

Step 3: Residual Alkalinity and Mash pH

  • Calculating Residual Alkalinity:

    • Important for predicting mash pH, which is crucial for enzymatic activity.

  • Acid Addition:

    • Among various methods, a negative residual alkalinity helps achieve an optimal pH range.

    • Target mash pH is around 5.4 to 5.6, ideally.

    • Achieving mash acidification can drop pH:

      • Example: 20% crystal malt can lower mash pH by 0.5 units.

      • Other malts like 10% black malt or roasted barley can have similar effects.

Summary of Key Points

  • Minimum desired calcium concentration in packaged all-malt beer is around 40 PPM.

  • Malt provides approximately 30 PPM, accounting for losses during brewing, needing addition of 40-60 PPM calcium to the brewing water.

  • Steps to remember:

    1. Review the malt bill and the impact of dark malts on pH.

    2. Understand water composition relative to beer style.

    3. Ensure minimum calcium concentration needs are met.

    4. Decide on salts and their quantities to match the beer style.

    5. Evaluate residual alkalinity and estimate mash pH for potential acid additions.

  • Goal is consistently to maintain a mash pH around 5.4 to 5.6,

  • Utilize computer programs for calculations if desired.

Final Recommendations

  • Understand and replicate calculations relevant to water chemistry adjustments.

  • Embrace the learning process as you advance in your brewing career.