Indonesia is known as an energy-rich country, both fossil and renewable. In 2019, the national energy supply still relied on oil, coal and natural gas, with a total proportion in the primary energy mix of 91.5%. Import dependency on petroleum and the high burden of the state budget for fuel subsidies are why the Indonesian Government implements biofuel policies in Indonesia. Biofuel development in Indonesia has been implemented from 2006 with Presidential Regulation No. 5 of 2006 to Regulation of the Minister of Energy and Mineral Resources No. 41 of 2018. Since 2008, the Government has issued a mandatory policy for using biodiesel with a mixture content of 2.5%. The Government gradually encouraged increasing biodiesel content to 7.5% in 2010, 10% in 2011, 15% in 2015, and 20% in 2016. By 2020, biodiesel mandatory is targeted to be 30%. Over the years, the biodiesel industry has shown an increase in quantity and capacity. Using biofuels has many positive impacts, such as reducing diesel import and CO2 emission and increasing CPO and labour’s added value. On the other hand, the mandatory biofuel policy negatively impacts the environment due to the possibility of land expansion. This study aims to review biodiesel policies in Indonesia since 2006 and analyze the problems and outputs in each policy and challenge for future biodiesel development.

During Covid-19 pandemic, the increase in LPG types was 0.6-2.4 million BOE, while in the household sector it was 2.3-6.9 million BOE, so causes LPG import growth ratio to increase by 4.8%/year (BPPT, 2020). Therefore, it is necessary to make efforts to suppress LPG imports by increasing the supply of EBT in the household sector with biogas production. The research aims to look at the biogas production modeling system from the resulting cow dung waste. The research method that studies the literature is based on modeling data based on data obtained using Powersim 10. The results showed that LPG demand in 2020 is 2.4 million BOE that could be fulfilled by a biogas source from 9539238.75 kg ~ 0.9 metric tons cow dung waste. This cow dung waste is able to produce 381569.55 m3/kg of methane gas which is equivalent to 0.59 metric tons LPG, savings Rp 690 M; 103 million liters gasoline, savings Rp 793 M; 64.8 million liters diesel fuel, savings Rp 333.8 M; 80 million liters kerosene, savings Rp 1 T; 4.53 metric tons wood, savings Rp 4.5 T. This favorable situation must be immediately felt by the community with an estimate of future benefits.

Sebira is a small island located at the northernmost of the Thousand Islands, Indonesia. The Electricity supply at the island uses an isolated network system for its territory. This study aims to model a system of electrical energy supply in Sebira Island. We explore literature studies related to the electricity supply system to support our model to be more representative. We then describe the system with a Causal Loop Diagram and a Stock Flow Diagram. The current electricity supply comes from solar power plants 400 kWp and three units diesel power plants with capacities of 125 kVA (2 units) and 250 kVA (1 unit). In this model, we consider the variables of population growth, initial investment, electricity shortages, fuel costs, profits, and margins. Furthermore, we create two scenarios in the simulation, with and without additional wave energy. The results show that in a sufficiently long period, the second scenario (with extra wave energy) is more profitable for the electricity supply in Sebira Island; however, it requires more initial investment than the first scenario.