Tannin Flocculant Storage — Tank Selection for Stormwater BMP and Sensitive-Watershed Treatment

Storing Tannin Flocculant? Start Here

When it comes to storing tannin flocculant, a natural water-treatment compound, it's important to choose the right tank. Tannin flocculants are derived from plant extracts and are used in various applications like stormwater management and drinking-water treatment. They are environmentally friendly and biodegradable, making them a preferred choice over synthetic alternatives, especially in sensitive environments. However, they do require careful storage to prevent microbial growth.

Can you store it in a poly tank?

Yes, you can store tannin flocculant in a polyethylene (poly) tank. High-density polyethylene (HDPE) or cross-linked polyethylene (XLPE) tanks are standard for this purpose. These materials are non-corrosive and suitable for the mildly acidic nature of tannin solutions. Just ensure the tank is rated for at least 1.5 specific gravity to handle the weight of the solution.

Preventing Microbial Growth

One key issue with storing tannin flocculant is preventing microbial growth over time. Since tannin solutions can support microbial activity, it's crucial to maintain cleanliness and possibly use preservatives if the solution will be stored for extended periods. Regular monitoring and maintenance will help keep the solution effective and safe.

The safety that actually matters

• Use HDPE or XLPE tanks to avoid corrosion and chemical reactions.
• Ensure all fittings and gaskets match manufacturer compatibility charts.
• Regularly inspect and clean tanks to prevent microbial contamination.

Common questions

Can tannin flocculant be used in drinking water treatment?

Yes, tannin flocculant is suitable for drinking water applications and is certified under NSF/ANSI 60.

What materials should be avoided in the storage system?

Avoid using carbon steel and galvanized steel, as they can react with tannin to form unwanted precipitates.

Is tannin flocculant safe for fish?

Yes, it is non-toxic to fish at typical residual concentrations, making it a good choice for sensitive ecosystems.