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Cross-flow filtration of fruit juice


Table 10.9. Operation and maintenance of the filtration technology (input)
 
Input
Parameter The Pressfilter Ultrafiltration Crossflow microfiltration
Use of energy (kW/h ,
kW/m3 juice and kW/m3/m2)		 17 kW/h

BC juice amount:
2104,2 m3

Use of energy:
10 m3/h /17 kW/h = 0,588 m3/kW
2104,2 m3/0,588 m3/kW = 3577 kW

C juice amount:
1583,225 m3

Use of energy:
8 m3/h /17 kW/h = 0,471 m3/kW
1583 m3/0,471 m3/kW = 3364 kW

Total use of energy:
3577 kW + 3364 kW = 6942 kW

kW/m3 juice:
6942 kW / (2104,2 m3 + 1583,225 m3) = 1,88 kW/m3

kW/m3/m2:
1,88 kW/m3/15m2 = 0,125 kW/m3/m2

 55 kW/h

BC juice amount:
3907,8 m3

Use of energy:
8 m3/h /55 kW/h = 0,145 m3/kW3907,8 m3/0,145 m3/kW = 26866 kW

C juice amount:
2940,275 m3

Use of energy:
7 m3/h /55 kW/h = 0,127 m3/kW2940 m3/0,127 m3/kW = 23102 kW

Total use of energy:
26866 kW + 23102 kW = 49968 kW

kW/m3 juice:
49968 kW/ (3907,8 m3 + 2940,275 m3) = 7,30 kW/m3

kW/m3/m2:
7,3 kW/m3 /210 m2 = 0,0347 kW/m3/m2

 8 kW/h

Juice amount:
6012 m3 + 4796 m3 = 10808 m3

Use of energy:
8 m3/h /8 kW/h = 1m3/kW
10808 m3/1 m3/kW = 10808 kW

kW/m3 juice:
10808 kW / 10808 m3  = 1 kW/m3

kW/m3/m2:
1 kW/m3 / 80 m2 = 0,0125 kW/m3/m2
Cost of energy (Kr/m3 juice) Cost of energy:
6942 kW *0,86 Kr/kW = 5970 Kr.

Kr/m3 juice:
5970 Kr / (2104,2 m3 + 1583,225 m3) = 1,62 Kr/m3

Kr/m3/m2:
1,62 Kr/m3/15m2 = 0,108 Kr/m3/m2

 Cost of energy:
49968 kW *0,86 Kr/kW = 42972 Kr.

Kr/m3 juice:
42972 Kr / (3907,8 m3 + 2940,275 m3) = 6,28 Kr/m3

Kr/m3/m2:
6,28 Kr/m3/210 m2 = 0,0299 Kr/m3/m2

 Cost of energy:
10808 kW *0,86 Kr/kW = 9295 Kr.

Kr/m3 juice:
9295 Kr / 10808 m3 = 0,86 Kr/m3

Kr/m3/m2:
0,86 Kr/m3/80m2 = 0,0108 Kr/m3/m2
Filter aid and costs.

(Kg perlite and the purchasing expenses Kr/m3 juice)

 4000 Kr/ton, 3 kg kieselguhr/h

Amount used a year:
2104,2 m3/10 m3/h = 210,4 h
1583,2 m3/8 m3/h = 197,9 h
(210,4 h +197,9 h)* 3 kg/h = 1225 kg

Price:
1,225ton * 4000 Kr/ton = 4900 Kr
4900 Kr / (2104,2 m3 + 1583,225 m3) = 1,33 Kr/m3

 None None
New water for cleaning (l/m3 and the expenses Kr/m3 juice) 4000 l. /a cleaning.
ca. 45 times cleaning/year
500 l*45 = 180000 l/year

l/m3 juice:
180000 l / (2104,2 m3 + 1583,225 m3) = 48,8 l/m3

Costs:
(180,0 m3 * 14,5 Kr/m3) /
(2104,2 m3 + 1583,225 m3) = 0,71 Kr/m3

None
0 Kr/m3 - the amount is covered by the water from the evaporator.		 None
0 Kr/m3 - the amount is covered by the water from the evaporator.
Labour cost pr. cleaning
(Kr/m3 juice)		 Non-automatic.
3 h / a cleaning.
ca. 45 times cleaning/year
3 h * 45 times = 135 h

Price:
One manhour costs: 115 Kr.
115 Kr/h * 135h = 15525 Kr
15525 Kr / (2104,2 m3 + 1583,225 m3)  = 4,21 Kr/m3

 Non-automatic.
2½ h / a cleaning.
ca. 170 times cleaning/year
2½ h * 170 times = 425 h

Price:
One manhour costs: 115 Kr.
115 Kr/h * 425h = 48875 Kr
48875 Kr / (3907,8 m3 + 2940,275 m3) = 7,14 Kr/m3

 Automatic.
Ca. 96 hours a year.

Price:
One manhour costs: 115 Kr.
115 Kr/h * 96h = 11040 Kr
11040 Kr / 10808 m3 = 1,02 Kr/m3