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ABSTRACT
To compare the energy consumption of hop drying is part of a holistic sustainability review of hop production. This US team looked into the general sustainability challenges in beer production including hops production. Sustainability is often thought of solely in context of the environment, but it is recognized to encompass the integration of economic development, social development, and environmental protection, which are referred to as the three pillars of sustainability. If we look at it from an environmental perspective the method of LCA (life cycle analysis) is often used, which means to look at the different parts/ingredients from "cradle to grave". The brewery in general is a large consumer of water and energy. Published figures are 8-12 kWH, 5hl of water 150 MJ of fuel energy to produce 1 hl of beer plus 13.6 kg of spent grain and 4 kg of spent yeast produced. Speaking in Carbon foot print a published study indicates that packaging accounts for 40%, and raw materials for 22% (mainly barley). Although the impact of hops was found to be small in this review, the quantity of hops required for brewing hop forward beers is much higher. A beer with 110 g of hops/hl of beer can equal 0.2% of the total carbon footprint. A tenfold usage of hops of 1.1kg/hl beer would mean 2% of the total carbon footprint. Parameters for hops production are machinery, irrigation, fertilization, soil emissions and pesticides usage and kilning. Overall estimates of emissions equivalents ranged from ~3.5 to 5.5 kg of CO2e per kilogram of hops in all cases, estimates were substantially higher than literature values for the production of malt on a kilogram per kilogram basis, which were reported by TCC as 0.91 kg of CO2e per kilogram. Meanwhile the hop industry is providing sustainability reports.

REFERENCES:

Dean G. Hauser et al: An Overview of Sustainability Challenges in Beer Production, and the Carbon Footprint of Hops Production, MBAA TQ vol. 56, no. 4, 2019, pp. 00-00


Source: Barth Innovations