On September 22, Novozymes launched Liquozyme LpH, a new, highly efficient alpha-amylase that reduces mash viscosity and breaks down starch to shorter dextrin chains, even at low pH.

Designed for ethanol plants needing better viscosity reduction at low pH, Liquozyme LpH offers ethanol producers more efficient and smoother operations with industry-proven, extra-robust performance to insure against pH excursions. The advanced formulation makes Liquozyme LpH the alpha-amylase of choice for plants that want to reduce ammonia use or those looking to run higher solids and increase throughput without sacrificing yield.

Created with producers’ operational needs in mind

This new alpha-amylase lets producers:

  • reduce or eliminate the need for ammonia in the cook process, resulting in a safer working environment, easier compliance, reduced risk;
  • reduce the need for sulfuric acid in the cook process, providing cost savings;
  • produce similar or higher ethanol yield compared to standard industry liquefaction products; and
  • potentially increase throughput.


Plant trials with Liquozyme LpH have shown up to a 40% improvement in viscosity in slurry, and up to 17% improvement in liquefaction, compared to a baseline mash with a competitive, commercially-available low-pH alpha-amylase. Such a dramatic viscosity break can increase throughput while reducing wear-and-tear on plant equipment and reducing energy use.

At the same time, Liquozyme LpH delivers equal or higher dextrin equivalence (DE) in the cook process when compared with another commercially-available low-pH alpha-amylase.

Performance of Liquozyme LpH vs. competitive low pH AA

Figure 1: Liquozyme LpH achieves equal or higher DE values in the cook process (green columns) when compared with a competitive low-pH alpha-amylase (dark purple columns).

Liquozyme LpH versus competitive low pH AA

Figure 2: A competitive low-pH alpha-amylase provides a baseline at zero. The purple columns show the percentage of viscosity improvement in slurry using Novozymes Liquozyme LpH. The gray columns show viscosity improvement with Liquozyme LpH in liquefaction. Viscosity was determined as the time it took for one liter of mash to flow through a tube. In other words, the slurry with Liquozyme LpH moved through the tubing up to 40% faster than the baseline mash.

To learn more about Liquozyme LpH or use it in your plant, contact your Novozymes account manager.

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Kay Gamble

Kay Gamble is a Launch Manager at Novozymes.

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