Showing posts with label must. Show all posts
Showing posts with label must. Show all posts

Wednesday 11 October 2023

Pressing the Rondo


The Rondo stopped bubbling so we decided to finally press it and transfer it to demijohns. We moved the must from the steel fermentation tank into the hydropress. We used the yellow buckets (sterilised) to collect the juice. After the juice stopped flowing on its own, Alex activated the hydropress. We collected one full bucket of juice. 

Very dark red. Nice scent. Bland taste. I tested the Brix and it came in at 9 but quite unclear. Specific gravity came in at 1.000. That shouldn't be. We transferred into two demijohns using the stainless steel funnel and a large glass measuring cup (all sterilised). The room temperature went from 20.7 to 21.8 while we worked. 

While cleaning up, we ran out of hot water, so we'll have another round of clean-up tomorrow. 

The weather yesterday was filthy and today lovely. Cool this morning -- almost nippy -- so we collected many of the vulnerable potted plants and transferred them to the polytunnel. The temperature hit 13.2C today compared with 16.5C yesterday and 18C for days before that. Unnatural.  

The vineyard is looking very colourful as all of the red grape vines have turned lovely colours. Curiously, the white vines remain green. 

The clear glass bottles arrived by courier today. The box was ripped and smashed but miraculously the bottles are intact. The green bottles and corks should arrive Friday.  Alex is next undertaking learning how to use the new equipment, especially the bottle washer and the heater. We won't be bottling for a while as we have to rack at least once, but I'm thinking of racking twice because the juice is quite cloudy. We'll see.











Saturday 16 September 2023

Must is fermenting!


Yesterday, we finished destemming and pressing the Solaris grapes. At about 8:30 pm, we added the yeast and nutrient mixture and sealed the vat. Here are some stats from the harvest.

Solaris Harvest

Brix target: 20-24

Brix reading Thursday 14 September 2023: 22

Grape Yield: 45 kg

Hand de-stemming and hydro-pressing were completed 15 September

Must yield: 19.6 litres

Must Brix: 23

Must SG: 1.094

VenoFerm Nutrisal (Diammonium phosphate) nutrient 10g in ~ 100 ml 50:50 boiled water and must

Oenoferm Terra Yeast reactivated in nutrient solution for 15 minutes. 

Fermentation started at 2030h 15 September 2023 @ Room temperature 19.5C.

The sugar content should get us to about 12.8% alcohol BV. We had a taste of the juice and it was very flavourful, not like the juice we made from the Ross House grapes. So this entire process has been very encouraging this year. 

We need to figure out how to program the Farho Ecogreen heater. I just downloaded the instruction manual and it looks tedious. But room temp has to be 22C for the red wine. The Brix is reading of the Rondo grapes is 20-23 today and the target is 22-26 so we opted to leave it for a few more days. I hope the coming rain won't dilute the juice too much. 









Very excellent book. 

Complicated programmable heater.

Fermentation vat with floating lid

Waste after pressing

Stems for the compost

Hydrometer Scale Conversion Table



The sunset over the shed



HYDROMETER SCALE CONVERSION TABLE

 


Specific gravity at 20°/20°C

Oechsle

°Brix / Balling

Baumé

 1.00000

0.0

0.0

0.00

1.00078

0

0.2

0.1

1.00155

1

0.4

0.2

1.00233

2

0.6

0.3

1.00311

3

0.8

0.45

1.00389

4

1.0

0.55

1.00779

8

2.0

1.1

1.01172

12

3.0

1.7

1.01567

15

4.0

2.2

1.01965

20

5.0

2.8

1.02366

24

6.0

3.3

1.02779

28

7.0

3.9

1.03176

32

8.0

4.4

1.03586

36

9.0

5.0

1.03998

40

10.0

5.6

1.04413

44

11.0

6.1

1.04831

48

12.0

6.7

1.05252

53

13.0

7.2

1.05667

57

14.0

7.8

1.06104

61

15.0

8.3

OK from here for red per TW

1.06534

65

16.0

8.9

1.06968

70

17.0

9.4

1.07142

71

17.4

9.7

1.07404

74

18.0

10.0

1.07580

76

18.4

10.2

1.07844

78

19.0

10.55

1.07932

79

19.2

10.65

Very Good for red from here per TW

1.08021

80

19.4

10.8

1.08110

81

19.6

10.9

1.08198

82

19.8

11.0

1.08287

83

20.0

11.1

1.08376

84

20.2

11.2

1.08465

85

20.4

11.35

1.08554

86

20.6

11.45

 

Specific gravity at 20°/20°C

Oechsle

°Brix / Balling

Baumé

1.08644

86

20.8

11.55

1.08733

87

21.0

11.7

1.08823

88

21.2

11.8

1.08913

89

21.4

11.9

1.09003

90

21.6

12.0

1.09093

91

21.8

12.1

1.09183

92

22.0

12.2

1.09273

93

22.2

12.3

1.09364

94

22.4

12.45

1.09454

95

22.6

12.55

1.09545

95

22.8

12.7

1.09636

96

23.0

12.8

1.09727

97

23.2

12.9

1.09818

98

23.4

13.0

1.09909

99

23.6

13.1

1.10000

100

23.8

13.2

1.10092

101

24.0

13.3

1.10193

102

24.2

13.45

1.10275

103

24.4

13.55

1.10367

104

24.6

13.7

1.10459

105

24.8

13.8

1.10551

106

25.0

13.9

1.10643

106

25.2

14.0

1.10736

107

25.4

14.1

1.10828

108

25.6

14.2

1.10921

109

25.8

14.3

1.11014

110

26.0

14.45

1.11106

111

26.2

14.55

1.11200

112

26.4

14.65

1.11293

113

26.6

14.8

1.11386

114

26.8

14.9

1.11480

115

27.0

15.0

1.11573

116

27.2

15.1

1.11667

117

27.4

15.2

1.11761

118

27.6

15.3

1.11855

119

27.8

15.45

1.12898

129

30.0

16.57