Industrial Xylanase Storage & Tank Compatibility

Storing Industrial Xylanase? Start Here

Industrial xylanase is an enzyme preparation that hydrolyzes the beta-1,4 backbone of xylan, the major hemicellulose in plant cell walls, releasing shorter xylo-oligosaccharides and xylose. It is produced by controlled fermentation of fungal and bacterial strains such as Trichoderma, Aspergillus, and Bacillus, then formulated as a buffered aqueous concentrate (water plus a glycerol or sorbitol stabilizer and a salt buffer) or as a tan powder. The enzyme is widely used in pulp and paper biobleaching, animal feed and baking, biofuel and starch processing, and as a processing aid in beverages and detergents. Because the product is delivered as a near-neutral, water-based protein solution, it is non-corrosive and chemically gentle toward containment. The governing concern for material selection is therefore not aggressiveness toward the tank but protecting enzyme activity from heat, light, and metal-ion contamination — and protecting workers from the protein's respiratory sensitization hazard.

Is Industrial Xylanase Safe to Store in Polyethylene Tanks?

Yes. Industrial xylanase is an aqueous enzyme solution, and polyethylene is an excellent match for water-based biological products. Both HDPE and XLPE earn a Satisfactory (S) rating for buffered xylanase concentrates and their field dilutions at ambient temperature, consistent with standard polyethylene chemical-resistance charts that rate dilute aqueous protein, polyol, and salt solutions as compatible. The polymer does not catalyze enzyme breakdown and contributes no metal ions that would denature the protein, which is why polyethylene totes and bulk tanks are the industry-standard package. Keep the tank shaded and below about 40 °C to preserve activity, since heat — not the polymer — is the limiting factor; many liquid grades are also stored chilled. Confirm any non-aqueous stabilizer (for example a glycol or solvent in a concentrated specialty grade) against the resistance chart before long-term storage, but for the great majority of commercial xylanase solutions, polyethylene is the correct, durable, and cost-effective choice.

Material compatibility at a glance

Industrial xylanase is supplied as a buffered, water-based enzyme concentrate, so high-density polyethylene (HDPE) and crosslinked polyethylene (XLPE) tanks are the appropriate, economical primary containment. Polypropylene, PVC, and 316 stainless steel are all suitable for piping, fittings, and dosing skids. EPDM is the preferred elastomer for gaskets and seals. Avoid carbon steel and unprotected aluminum, whose corrosion products can deactivate the enzyme and discolor the solution.

Ratings: S suitable · C conditional / limited · U unsuitable. Verify against the cited resistance charts and your concentration/temperature before specifying.

The safety that actually matters

• Treat as a respiratory sensitizer (H334): xylanase is a proteinaceous enzyme and inhalation of aerosols, mists, or dust can cause asthma or allergic breathing difficulties — use local exhaust ventilation and avoid generating airborne material.
• Treat as a skin sensitizer (H317): wear nitrile gloves and protective clothing; repeated skin contact can cause allergic reactions.
• Prevent eye contact (H319): wear chemical-splash goggles, provide eyewash stations, and flush at least 15 minutes if exposed.
• Wear a respirator rated for protein aerosols or enzyme dust when dosing, transferring, sampling, or cleaning, especially with powder grades.
• Contain spills with inert absorbent and rinse the area thoroughly; dried enzyme residue can become airborne dust and trigger sensitization.
• Store sealed, cool, and out of sunlight to preserve activity, and keep away from strong oxidizers, strong acids, and strong bases, which destroy enzyme activity.

Common questions

Can I store industrial xylanase in an HDPE or XLPE tank?

Yes. Xylanase is supplied as a buffered, water-based enzyme concentrate, and both HDPE and crosslinked polyethylene are rated Satisfactory for aqueous protein, polyol, and salt solutions. Keep the tank shaded and below about 40 °C to protect enzyme activity.

Why is xylanase labeled with a Danger signal word if it is just an enzyme?

Like most industrial enzymes, xylanase is a respiratory and skin sensitizer (H334 and H317). Repeated inhalation of aerosols or dust can cause asthma or allergic reactions, so the hazard relates to exposure, not to corrosivity or flammability. The exact classification is SDS-dependent.

What materials should I avoid for xylanase storage and handling?

Avoid carbon steel and bare aluminum. Their corrosion products can deactivate the enzyme and discolor the solution. Use polyethylene tanks with polypropylene, PVC, or 316 stainless fittings and EPDM seals.

How do I keep xylanase from losing strength in the tank?

Enzyme activity is mainly limited by heat, light, and pH, not by the polyethylene tank. Store cool and shaded, keep the container sealed, follow the supplier's pH window, and use stock before its rated shelf life.