New mash filtration process

With Nessie Ziemann Holvrieka is introducing an innovative system, which is revolutionizing the conventional brewhouse processes. The novel mash filtration process sustainably changes the lautering process due to shorter process times, increased raw material yields and reduced production costs.

The systems brings several advantages: Firstly, the brewer achieves high extract yields as well as high contents of yeast vital substances that causes a more advantageous fermentation. Further the filterability is improving significantly. On the other hand, there will be a better foam stability and an improved sensory perception.

The advanced mash filtration process combines the process steps separation of spent grains and wort, extraction in the counterflow procedure and dynamic washing of solids and their separation – by means of four rotary disk filters, connected in series. Due to the rotation of the sieve surfaces, the mash is actively transported through the system. The principle of the cross-flow filtration prevents a blocking of the sieve pores.

The combination of a low vessel volume and a short retention time of the mash significantly reduces the oxygen uptake of the lautered wort. The residual mash particles, which cannot pass the sieve surface, are conveyed to the next filter unit by means of the rotational movement and the gravity. The sparging of the spent grains is carried out in the transition between the filter units. An integrated baffle plate creates turbulences, causing a homogeneous mixing of the residual mash and the sparging water.