Acid Protease for Acidic Processing Lines
Ensure consistent protein breakdown in brewing, spirits, feed, hydrolysis, and condiments with acid protease engineered for stable low-pH industrial use.
Protein-rich substrates processed under acidic pH often yield inconsistently when neutral proteases lose function. Acid protease (EC 3.4.23.18) from Aspergillus niger maintains activity at pH 2.0–5.0, enabling processors to improve fermentation performance, clarity, digestibility, and hydrolysis control without altering pH profiles. By converting complex proteins to peptides and amino acids, it supports yeast nutrition in brewing and distilling, enhances nutrient availability in feed, and aids functional protein ingredient production. In condiment lines, it sustains flavor development via steady protease activity. Leather processors apply it in bating and dehairing at acidic pH for reduced chemical demand. Optimal temperature 30–50 °C fits typical acidic process designs. A single specification covering multiple low-pH uses aids procurement efficiency and standardizes outcomes across plants. With activity 50,000–100,000 U/g and MOQ 25 kg, acid protease offers reliability for scale-up and repeat production in demanding acidic workflows.
Alcohol and spirits fermentation
In baijiu, whisky, and ethanol production, grain proteins can hinder efficiency and downstream handling. Acid protease hydrolyses these proteins during mash and fermentation, supporting nutrient release and stable runs within existing low-pH stages.
Brewing and wort clarification
Breweries facing haze and filtration challenges benefit from controlled protein breakdown. Acid protease performs in acidic wort, improving clarity and reducing load on clarification, enhancing batch uniformity and brewhouse throughput.
Animal feed protein digestibility
Feed lines seek improved nutrient use without higher input cost. Acid protease aids digestibility by reducing large protein fractions to peptides in acid-conditioned systems, supporting FCR goals and ingredient utilization.
Protein hydrolysis for peptides and amino acids
Hydrolysate manufacturers require precise conversion. Acid protease delivers consistent hydrolysis under low pH, producing peptides and amino acids from plant and animal streams with predictable performance.
| Parameter | Value |
| Activity range | 50,000 – 100,000 U/g |
| Optimal pH | 2.0 – 5.0 |
| Optimal temperature | 30°C – 50°C |
| Appearance | Light yellow to brown powder |
| Shelf life | 12 months (sealed, cool, dry place) |
| Packaging | 25 kg fiber drums / custom packaging |
Frequently Asked Questions
What is acid stable protease used for in industry?
Acid stable protease is applied where protein breakdown must occur under pH 2.0–5.0. Common uses: brewing, spirits, feed, hydrolysis, soy sauce, leather. It provides reliable activity in acidic systems, improving consistency and downstream handling.
How does acid protease improve brewing and fermentation?
In brewing and fermentation, acid protease breaks down proteins that affect nutrient balance, filtration, and clarity. Acting early, it can improve wort handling, reduce haze, and stabilize fermentations. In spirits, it releases nutrients from grain matrices.
What dosage range is typically used for acid protease?
Dosage varies by substrate, protein load, pH, and time; pilot trials are advised. Typical industry evaluations range from 50–300 g/tonne of raw material, aligned with acidic pH 2.0–5.0 and 30–50 °C.
Is acid protease suitable for feed and hydrolysis lines?
Yes, suitable for feed and protein hydrolysis when acidic operation is part of process design. In feed, it aids digestibility; in hydrolysis, it produces peptides and amino acids with controlled conversion.
What storage conditions are recommended?
Store sealed in a cool, dry place to retain activity for 12 months. Avoid moisture and heat to maintain the specified 50,000–100,000 U/g range.
Request Acid Protease Technical Details
Provide substrate type, process pH and temperature, and desired hydrolysis outcome. We’ll recommend grade (50k or 100k U/g), ship a 100 g trial with COA, and quote for 25 kg drums within 24 h.
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