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Acknowledgement
This experiment was funded by Operational Fund for State Higher Education with Group Research Scheme, according to letter of Agreement
No. 209UN21.6PL2012, date: 09 August 2012.
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133
Implementation of life cycle assessment LCA on tempeh production in Bantul district - Yogyakarta special province
- Indonesia
Wahyu Supartono
1,
, Lina Widyasari
1
, Didik Purwadi
1
1
Department of Agroindustrial Technology, Faculty of Agricultural Technology Gadjah Mada University, Yogyakarta, Indonesia
Corresponding author: wstonoyahoo.com; wstonougm.ac.id
Abstract
Life cycle assessment LCA is one part of ISO 14000 –
Environmental Management System – that can identify the opportunity for
minimizing usage of materials and energy and reducing the environmental effects during the life cycle of products or services. The research was
conducted in tempeh industries at Bantul District. Tempeh is one of Indonesian traditional foods that gives contribution to culinary world.
Tempeh is made from soybean and it was fermented between 26-48 hours before it became compact food and was ready to be cooked. The research
was applied at three industries that had three different production capacity. Three producers were chosen, CHOSIM for low production capacity,
NGATIJAN for middle capacity and MUCHLAR for high capacity. Aims of the research were to determine and to compare the LCA of three tempeh
producers, and the effects to the environment during the tempeh production. Actually the basic calculation of the LCA is mass and energy balance.
Results of the research showed that for producing tempeh from 1 kg fresh soybean it was needed 0.29607 MJ human energy, 1.2797 MJ energy from
fuel gasoline, 0.02227 MJ electricity, 0.24725 MJ combustion of woods. If kerosene was used it yielded 3.24807 MJ. Combusting gasoline released
emission of CO
2
0.00119 mg, NO
x
0.00058 mg and SO
2
0.00098 mg. Usage of woods as energy source released emission of CO
2
4607.31 mg, C
n
H
m
4194.92 mg, CO 244431.82 mg, CH
4
7835, 92 mg, H
2
1407.38 mg and N
2
6846.19 mg. Combusting of kerosene gave emissions of CO 0.14 mg, SO
2
9.52 mg, NO
2
1.29 mg, HC 0.22 mg dan solid particle 1.68 mg. Solid and liquid wastes were utilized for feeds, but the pollutants gave contribution
for air pollution that led to danger of human health and global warming. Finally the results could give recommendation how the industry could
reduce the energy consumption during the production but still yielding the same quality of products.
Keywords
life cycle assessment, tempeh, Yogyakarta
