2. Alco base Turbo Yeast 20% Technical Characteristics (Technical Specification)

Alco base Turbo Yeast 20% Technical Information and Specification

Appearance: A mixture of white crystalline powder and buff colored rod shaped particles.

Moisture: < 3.0% Lead: < 3mg/kg Fluoride: <70mg/kg Viability: >1.0 x 1010/g of yeast Arsenic: <1mg/kg Chloride: <50mg/kg Total bacteria: <1 x 104/gram Iron: <5mg/kg Heavy Metals (as Pb): <10mg/kg Coliforms: < 50/g SO3: <200mg/kg

Batch Preparation

  1. Transfer 47,500 kg 95DE glucose/dextrose syrup into fermentation tank (71% solids)
  2. Top up to 100,000L with mains cold water
  3. Add 540kg of Alco Base Turbo Yeast 20% directly, mix well and leave to ferment

Notes Start temperature – 95DE should be delivered hot at 60oC, after filling fermenter with mains cold water the temperature should be between 21 – 35oC depending upon the time of the year/mains cold water temperature. The perfect start liquid temperature is 30oC but any temperature within this 21 – 35oC range is acceptable providing the fermenter has automatic cooling facilities.

Alco Base Turbo Yeast 20% addition – either directly into the fermenter as dry mix where the fermenter has mixing facility or add to 5,400L of 30oC water in a separate mixing vessel, mix for 3 minutes then pump across into fermenter within 15 minutes of solution preparation.

Target start gravity +130 (30.6 Brix)

Alternate Feedstock – Whilst Alco Base Turbo Yeast 20% is designed for use with pure fermentable sugars such as 95DE sugar syrup a wide range of other fermentable feedstock’s can be used such as dry sucrose (to 19% ABV), dry dextrose (to 20% ABV), molasses and starch converted grains. Support can be provided where such alternate feedstock is used.

Process Conditions Fermentation Temperature

It is important that the liquid fermentation temperature be maintained between 20 -26oC (optimum 25­-26oC). Temperature 27oC or above may result in stuck fermentation or lowered quality. Note that the lower the temperature the longer the fermentation time, for example, a fermentation temperature of 20oC would take 10 days to reach 20%ABV. No stirring needed during fermentation.

pH

There is no need for pH monitoring and adjustment during fermentation with Alco Base Turbo Yeast 20% . This product contains sufficient food-grade pH buffers for intrinsic pH control.

Foaming

Alco Base Turbo Yeast 20% is extremely low foaming and does contain anti-foaming agents. Minimal foaming will occur during the first 24 hours where liquid antifoam should be added when there is less than 10% free tank head space.