BrauSol Special – “The alternative”
BrauSol Special is a highly concentrated colloidal solution of a liquid silica sol. It ensures perfect clarification and improves final filtration.
Reaction of BrauSol Special during the brewing process
When BrauSol Special is added to the wort or beer and under suitable pH conditions, the SiO2 molecules cross-link and transform into an insoluble hydrogel. Together with adsorbed turbidity-forming particles (12 – 60 kDa), it flocculates and settles to the bottom of the tank. The settling rate of the product is between 1.1 – 1.3 m/day.
BrauSol Special is a highly negatively charged liquid silica sol. The product reacts with the positively charged proteins in the beer and, as a final reaction, the silica sol is restructured into a hydro-silica gel so that it looks like a 3D mesh.
BrauSol Special is a highly concentrated colloidal solution of a liquid silica sol. It ensures perfect clarification and improves the final filtration.
Neutralisation reaction of the silica sol in the wort
Properties
- SiO2 content of 40
- alkaline pH value: 9.0-10
- surface area of approx. 220 m2/g
- Average particle size of 15 nanometers
The total dosing quantities are between 20 – 160 ml/hL in total production!
Use of BrauSol Special in the brewhouse
For optimum hot trub separation, BrauSol Special is added in the whirlpool. Dosing time is when the whirlpool is between 75 – 85 % full. Visual check: After dosing into the hot wort, the wort turns white for 20 seconds -> this is the neutralization reaction in which the liquid silica sol is reformulated into a hydrogel (see pictures).
Very important: Do not dose before pumping over, otherwise the pump will destroy the coagulate between the silica sol and the proteins! The coagulate settles at the bottom of the whirlpool and is separated together with the hot trub.
Dosage: 20-40 ml/hL wort.
- Accelerates fermentation
- optimizes the filter throughput when reducing trub-sensitive proteins
- strong hot trub precipitation
- very compact trub
Use BrauSol Special during fermentation or when transferring to the storage cellar
BrauSol Special is dosed into the cooled wort (preferred) or into the fermented beer using a special dosing device (dosing pump as for cleaning agent dosing) or it is added to the hose (manually) or the fermentation tank before the cooled wort is added (via keg).
Dosage: 20-40 ml/hL of chilled wort.
- No effect on fermentation
- Yeast yield is increased
- beer clarifies faster
- the filter throughput during final filtration is increased
Dosing BrauSol Special during the transfer from the fermentation cellar to the storage cellar provides good results, especially with fermented beer that is transferred at a temperature around the freezing point (0°C – 10°C).
Dosage: 20-40 ml/hL of green beer.
The majority of the chill haze-forming particles are insoluble at low beer temperatures. Together with other filtration-inhibiting substances, they are eliminated from the beer in a rapid sedimentation process.
The brewmaster must take into account that the settling time is around 1.1 – 1.3 m/day.
Possible dosing application for treatment during fermentation or maturation
As a dosing system is not available in all cases, it is also possible to pour the BrauSol quantities into a cleaned keg, connect it as in the taproom and transfer the quantities into the fermentation tank via the outlet valve (see pictures).
After emptying the keg, the product can be homogenized under counterpressure with air (if added at the start of fermentation) or with CO2 (if added during maturation). The bubbling time is 3 times 15 seconds.
The advantage: you know exactly that the correct quantities are in the fermentation vessel.
Special applications of BrauSol Special
For beers that are difficult to filter, such as wheat, Kölsch or Altbier, the addition of 40 g/hL BrauSol Special during fermentation leads to good results. Protein compounds from the wheat malt that are sensitive to turbidity are adsorbed and filterability is significantly improved. It is recommended to proceed in the same way for beers that exhibit filtration problems due to fluctuations in the malt raw material.
Special application of BrauSol Special during filtration
It has been shown during filtration that if there is increased turbidity (90°) at the KGF outlet, an addition of 3 – 15 ml/hL during the ongoing dosage (addition to the kieselguhr dosing vessel) can reduce the turbidity by up to 0.3 – 0.6 EBC after just 10 – 15 minutes. The addition causes a direct reaction between the strongly negatively charged silica sol and the positively charged protein-glucan fractions, whereby the medium-molecular protein fraction (responsible for turbidity reactions) in particular reacts with the silica sol without blocking the filter.
Recommended dosages:
- Candle filter/horizontal filter: 5 – 15ml/hL
- Frame filter: 3 – 5ml/hL
Dosages higher than 15ml/hL are not recommended, as otherwise the filter may clog.
Special use of BrauSol Special for “keg or bottle-conditioned” beer
For beers clarified with BrauSol Special during maturation, it should be noted that BrauSol Special not only removes the turbidity-sensitive proteins, but also reduces the yeast content. In practice, this means that in order to ensure a flawless second fermentation for keg and/or bottle-conditioned beer, you need to add some fresh yeast to ensure that the process runs smoothly.
Sedimentation trials on cask conditioned beer, conducted by Brewlab Ltd UK, December 2017
Results
The figures show that we obtained better sedimentation results with the lowest dosing rate and with an equal dosing rate of BrauSol Special compared to the standard dosing of Isinglass in 24 hours.
BrauSol Special – “The alternative”
BrauSol Special is a highly concentrated colloidal solution of a liquid silica sol. It ensures perfect clarification and improves final filtration.
Reaction of BrauSol Special during the brewing process
When BrauSol Special is added to the wort or beer and under suitable pH conditions, the SiO2 molecules cross-link and transform into an insoluble hydrogel. Together with adsorbed turbidity-forming particles (12 – 60 kDa), it flocculates and settles to the bottom of the tank. The settling rate of the product is between 1.1 – 1.3 m/day.
BrauSol Special is a highly negatively charged liquid silica sol. The product reacts with the positively charged proteins in the beer and, as a final reaction, the silica sol is restructured into a hydro-silica gel so that it looks like a 3D mesh.
BrauSol Special is a highly concentrated colloidal solution of a liquid silica sol. It ensures perfect clarification and improves the final filtration.
Neutralisation reaction of the silica sol in the wort
Properties
- SiO2 content of 40
- alkaline pH value: 9.0-10
- surface area of approx. 220 m2/g
- Average particle size of 15 nanometers
The total dosing quantities are between 20 – 160 ml/hL in total production!
Use of BrauSol Special in the brewhouse
For optimum hot trub separation, BrauSol Special is added in the whirlpool. Dosing time is when the whirlpool is between 75 – 85 % full. Visual check: After dosing into the hot wort, the wort turns white for 20 seconds -> this is the neutralization reaction in which the liquid silica sol is reformulated into a hydrogel (see pictures).
Very important: Do not dose before pumping over, otherwise the pump will destroy the coagulate between the silica sol and the proteins! The coagulate settles at the bottom of the whirlpool and is separated together with the hot trub.
Dosage: 20-40 ml/hL wort.
- Accelerates fermentation
- optimizes the filter throughput when reducing trub-sensitive proteins
- strong hot trub precipitation
- very compact trub
Use BrauSol Special during fermentation or when transferring to the storage cellar
BrauSol Special is dosed into the cooled wort (preferred) or into the fermented beer using a special dosing device (dosing pump as for cleaning agent dosing) or it is added to the hose (manually) or the fermentation tank before the cooled wort is added (via keg).
Dosage: 20-40 ml/hL of chilled wort.
- No effect on fermentation
- Yeast yield is increased
- beer clarifies faster
- the filter throughput during final filtration is increased
Dosing BrauSol Special during the transfer from the fermentation cellar to the storage cellar provides good results, especially with fermented beer that is transferred at a temperature around the freezing point (0°C – 10°C).
Dosage: 20-40 ml/hL of green beer.
The majority of the chill haze-forming particles are insoluble at low beer temperatures. Together with other filtration-inhibiting substances, they are eliminated from the beer in a rapid sedimentation process.
The brewmaster must take into account that the settling time is around 1.1 – 1.3 m/day.
Possible dosing application for treatment during fermentation or maturation
As a dosing system is not available in all cases, it is also possible to pour the BrauSol quantities into a cleaned keg, connect it as in the taproom and transfer the quantities into the fermentation tank via the outlet valve (see pictures).
After emptying the keg, the product can be homogenized under counterpressure with air (if added at the start of fermentation) or with CO2 (if added during maturation). The bubbling time is 3 times 15 seconds.
The advantage: you know exactly that the correct quantities are in the fermentation vessel.
Special applications of BrauSol Special
For beers that are difficult to filter, such as wheat, Kölsch or Altbier, the addition of 40 g/hL BrauSol Special during fermentation leads to good results. Protein compounds from the wheat malt that are sensitive to turbidity are adsorbed and filterability is significantly improved. It is recommended to proceed in the same way for beers that exhibit filtration problems due to fluctuations in the malt raw material.
Special application of BrauSol Special during filtration
It has been shown during filtration that if there is increased turbidity (90°) at the KGF outlet, an addition of 3 – 15 ml/hL during the ongoing dosage (addition to the kieselguhr dosing vessel) can reduce the turbidity by up to 0.3 – 0.6 EBC after just 10 – 15 minutes. The addition causes a direct reaction between the strongly negatively charged silica sol and the positively charged protein-glucan fractions, whereby the medium-molecular protein fraction (responsible for turbidity reactions) in particular reacts with the silica sol without blocking the filter.
Recommended dosages:
- Candle filter/horizontal filter: 5 – 15ml/hL
- Frame filter: 3 – 5ml/hL
Dosages higher than 15ml/hL are not recommended, as otherwise the filter may clog.
Special use of BrauSol Special for “keg or bottle-conditioned” beer
For beers clarified with BrauSol Special during maturation, it should be noted that BrauSol Special not only removes the turbidity-sensitive proteins, but also reduces the yeast content. In practice, this means that in order to ensure a flawless second fermentation for keg and/or bottle-conditioned beer, you need to add some fresh yeast to ensure that the process runs smoothly.
Sedimentation trials on cask conditioned beer, conducted by Brewlab Ltd UK, December 2017
Results
The figures show that we obtained better sedimentation results with the lowest dosing rate and with an equal dosing rate of BrauSol Special compared to the standard dosing of Isinglass in 24 hours.
