Analysis of GHG emissions of tofu industry, study case in Indonesia

Tofu is one of the protein sources with high demand in Indonesia. Currently, several tofu industries have used stainless steel-based equipment. This condition shows the seriousness of the tofu industry to make hygienic tofu products. However, hygienic tofu products are not enough. The competition of global market required the products to take notice not only for its quality, but also come into environmentally-friendly product that characterized by low value of CO2 emission. In accordance to the condition, studies related to the calculation of CO2 emissions resulted from a product are necessary. In this study, we conducted research on the estimation of CO2 emissions resulting from 1 kg of tofu using the LCA method and applying the system boundary from cradle to gate, in which greenhouse gas (GHG) emissions were calculated from soybeans plantation to 1 kg of tofu products. Case studies were conducted on 3 tofu industries and it was found that the GHG emissions produced per 1 kg of tofu were in the range of 0.35-0.5 kg CO2--eq. There are 3 main factor contributing to CO2 emissions, i.e. wastewater, soybean cultivation and soybeans transportation from plantation area to industry. The results of this study provide recommendation to the tofu industry to reduce CO2 emissions resulted from wastewater. The alternative is to treat wastewater using an anaerobic system to produce biogas for cooking purpose.

Jurnal Teknologi Lingkungan, 2022

No. Arsip : LIPI-20220103