Eco-Efficiency through Energy and Water Optimization

Eco-Efficiency through Energy and Water Optimization: The Role of Management Accounting Energy and water efficiency is one of the company's efforts to minimize the use of inputs, especially to save fuel and reduce greenhouse gas emissions that cause climate change and global warming. while water efficiency is carried out by the company to save the use of resources in producing company outputs. This also has an impact on cost savings made by PT Aneka Tambang Tbk UBP Emas Pongkor and increased company productivity. It can be seen that the company's use of energy and water decreased from 2012 to 2016. 3,000 2,500 2,000 Total 1,500 1,000 Energy and water costs 500 0 20122013201420152016 Year Figure 12 Energy and water use costs (in billion rupiah) It can be seen in the graph that the costs incurred in carrying out water and gas efficiency have increased in 2012 to 2013. This is because the programs implemented to carry out energy and water efficiency require large funds, but from 2013 to 2016 the costs incurred have decreased due to programs and systems. 21 With a decrease in costs in 2014 of Rp.197,952,000 (down 7.45%) from costs in 2013 of Rp.2,657,902,000. in 2015 there was a decrease in costs of Rp377,144,000 (down 15.33%) from 2014 of Rp.2,459,950,000. In 2016 there was also a decrease in costs of Rp.238,442,000 (down 11.45%) from 2015 amounting to Rp.2,082,806,000. It can be concluded that a decrease in the use of raw materials can reduce the company's input costs. Technically, the program carried out by the company in energy efficiency is the installation of electricity saving devices so that the company is able to make savings of Rp. 928,642,000 during the period 2012 to 2016 and the use of renewable energy for community access around underground mineral mines with company savings of Rp. 3,397,000 for the period 2012 to 2016. Technically, the programs carried out by the company in supporting water efficiency activities are Water Treatment Plant Technology and biopore infiltration holes to improve water and soil conservation which can save costs of Rp. 1,732,000,000. 2. Reduction of emissions and greenhouse gases Reducing emissions and greenhouse gases is a follow-up to the commitment of PT Aneka Tambang Tbk. UBPE Pongkor in dealing with climate change issues. The following is the total emissions generated both related to the production process and supporting facilities. 12,000 10,0008,000 Total 6,000 4,000 Emission and greenhouse gas abatement costs 2,000 0 20122013201420152016 Year Figure 13 Emission and greenhouse gas reduction costs (in million rupiah) The program carried out by PT Aneka Tambang Tbk. UBPE Pongkor was able to reduce the cost of managing emissions and greenhouse gases from 2012 to 2016 emissions and greenhouse gases produced by the company decreased, resulting in costs incurred by the company decreased. The program in reducing gases and emissions consists of modifying the electric current cycle. to reduce heater operating hours in the elution process by reducing elution heater operating hours for one hour in stages 2 and 5 of the total 6 stages carried out in the elution process. Elution is the process of releasing gold and silver adsorbed on carbon through a high temperature and pressure process. With the reduction of elution heater operating hours, liquid fuel consumption is reduced so that it can reduce emission and gas management costs every year from 2012 to 2016.