• Energy Research
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Despite a sufficient energy supply, harvesting energy from rainfall is essential for intelligent water management. A significant part is still untapped or little exploited, which is the renewable energy produced from rainwater. This paper proposes a portable gutter of the rainwater energy harvesting system to provide electricity that may be sufficient for powering lights and charging cell phones in rainy locations with limited electricity. A prototype is designed and tested to determine the feasibility of rainwater as a source of renewable energy. The aim is to minimize and respectively suspend the use of fossil energy sources, as well as decrease the percentage of pollution as it is a cause of global warming. The system prototype consisted of a gutter assembly that collected and funneled water from the roof to a downspout. The turbine was connected through a gearbox to a DC motor serving as the generator. The device is optimal during high rainfall intensities that produce larger flow rates. A smart algorithm has been applied, which is salutary to keep the system working and has the ability to control the flow of collected rainfall water. Also, this system is useful to install and use in the rural area where the national grids are not common and the level of rainfall is high. The applied system utilized and installed in more than one hundred premises can produce more than 4 kWh for one rain. In some countries such as Malaysia, the average number of rainy days is 250 days a year, so the use of this system in 100 premises can help to provide 80 MWh to the national grid yearly. The system is characterized by simplicity of design and lack of complexity in addition to ease of installation and cheapness, which is the basis for the availability of this system for use by everyone

Several aspects concern the attention of labor and employer on Constitution Number 11, the Year 2020, under Job Creation Act. Initially, worries arise about the possibility of one-sided layoffs. Layoff often occurs through companies that have yet to have a discussion. Nevertheless, it is necessary to align that the layoffs mechanism, in brief, does not intend to promote one-sided layoffs by employers. Under the Job Creation Act, Article 151 provided the bases for stakeholders to prevent any layoff. Further Constitution yet gives the possibility of a chance if employees are offended by any employer's treatment. In brief, this mechanism covers appreciates, protects, and supports employment rights fulfillment. In other words, this mechanism is still based on equity. Secondly, there is no further appropriate explanation concerning the reduction of wage policy in the Job Creation Act, whereas it is relevant for employment. The revision in Wage Policy includes reformation effort in severance pay, which also includes affirmation effort in share effect as risk management means, such as the risk of unemployment. Such matter needs further study empiric that shows whether the multiplier number as listed in Job Creation Act Constitution, which is Government Regulation No. 35 the Year 2021, is at an ideal level or not (or corresponds with employer capability). Third, there is no doubt that severance pay implementation can not avoid Labor Union attention. For instance, Labor/employee object if said severance pay is easily accepted. According to them, this dispute often occurs in Industrial Relations Court. Hence, the successful, effective implementation of a new severance pay policy indicates a strengthened Social Security. Regarding this, there are a few notes on implementation. For instance, to ensure corresponding data of Health BPJS and employment BPJS.

In support of healthy agriculture development to improve farmer's prosperity status, soil remediation and land conservation efforts maybe relied on the use of biomass of local vegetation. Results of field exploration conducted at Brantas Watershed of East Java indicated that there were at least 154 species of undergrowth scrubs, 47 species of agriculture-plantation crops, and 59 species of road shelter trees. The native undergrowth vegetations had undergone enormous seasonal variations. Biomass of predominance vegetations, e.g. Psophocarpus tetragonolobus, Phaseolus lunatus, Flemingia, Mimosa somian, Acacia villosa, Cassia mimosoides, Mucuna could potentially be used as organic matter sources to improve availability of nitrogen and phosphorus in soils. The amount of nitrogen and phosphorus contributed of the plant biomass significantly correlated with quality of the biomass.

Increased energy USAge in line with economic growth and the increase in world populationhas an immediate impact for the depletion of fossil -based energy, especially petroleum. The fact thatworld oil supplies are limited, many states are forced to prioritize energy policy as a top priority indevelopment policy. In addition, this condition has raised new fears that the global energy security.With a strong concern of potential extinction of petroleum and other fossil -based energy sources ,policy makers should pay more attention to energy security. The same trend is occurring in Indonesia.Along with the increase in the national population, national and regional development plans, the needfor national energy security is a must. The Indonesian government must be able to answer thechallenge is to strengthen national energy security. Because energy is a strategic conditions to supportnational development through the availability of sufficient, safe, and energy- quality and evenlydistributed throughout Indonesia at an affordable price, it requires a government policy that supportsnational energy security. An attempt was made by the Government of Indonesia to ensure energysecurity is to issue a policy for the use of renewable energy in Indonesia .

The expansion of agricultural commodities including oil palm plantations potentially causes an increase of greenhouse gas emissions by amplifying carbon dioxide (CO2) in the atmosphere. In the long term, this amplification will alter climate change. However, oil palm also has the potency to reduce greenhouse gas emissions by absorbing CO2 through photosynthesis. This study aims to determine the carbon stock that can be absorbed by oil palm and rubber plants, and to determine the relationship of rainfall with carbon stock in oil palm plants. The study used satellite image data based on Landsat and combined with rainfall data from near Perbaungan District, North Sumatra. Three Landsat data (acquisition date: (i) 12 February 2000, (ii) 8 March 2009, and (iii) 11 August 2019) were processed to estimate carbon stock. The procedure for estimating carbon stock was as follows: determining the sample and digitizing the sampling points, converting the digital value of the numbers into the spectral spectrum, calculating the albedo values, calculating the long-wave and short-wave radiations, computing biomass, and the absorbed carbon stock. The results showed that the carbon stock in oil palm was greater than that of rubber plants as oil palm has a greater biomass. The greater the plant biomass, the bigger the carbon stock absorbed. Further, the findings revealed that rainfall in dry season has a contribution to carbon stock in oil palm and rubber. The higher the total rainfall during dry season will increase the absorbed carbon stocks.

Production of biodiesel comes from trans-esterification reaction of fatty acid which produces methyl ester. Vegetables, animals and microalgae can be used for fatty acid sources by their oil, but microalgae have a more beneficial prospect compared to vegetables and animals. Microalgae have fast grow-rate, high oil productivity, low production cost and not having a competition with food industries. Among microalgae, Botryococcus braunii is the one with high oil quantity inside their cells (25 – 75 %). The wastewater of tofu industries is liquid residual from soybean processing becomes tofu which having a nuisance for the environment. This wastewater, usually called whey, is still containing organic materials such as water (99,34 %), protein (1,73 %), fat (0,63 %), nitrogen content (0,05%) and ash (0,11 %) and COD. Organic materials have effect to stimulate microalgae's growing. Objectives of this experiment are the influence of tofu whey addition at different concentrations toward biomass and lipid produced. This experiment provided the result which optimal cultivation of Botryococcus braunii reaches when using 10% concentration tofu whey with optimal optical density (OD) at day 9 (0,802), 2,4101 gram/litre of gained biomass and 0,8716 gram/litre of lipid production.,better than cultivation of Botryoccus braunii using syntetic nutrient. Maximum COD reduction was gained at 15% tofu whey addition with 88,51% efficiency. COD reduction at optimal tofu whey addition (10%) is 83,33%.

Under conditions of limited organic resources, polluted external environment, excessive emission of carbon in the atmosphere and as a result of global warming the use of renewed energy sources may become one of ways of solving problems of energy saving, energy efficiency, environment protection, energy independence from import raw materials. The active use of renewed energy sources will favor the increase of economic efficiency and competitiveness of components of the national AIC. The article indicates that during the last 20 years the world underwent worsening of natural-climatic and living conditions, climate change, strengthening of negative natural phenomena and so on. The aforesaid problems of the world scale were discussed at the International climatic conferences (Brazil – 1992; Japan – 1997; SAR – 2002; Paris – 2015; Germany – 2017), while considering the complex of questions as to improving the natural-climatic and living environment in the world, saving use of natural resources, acceleration of using renewable energy sources (RES), especially solar one. It was elucidated, that during the last years the power of solar energy stations (SPS) grew essentially. For the end of 2015 the leaders if setting SPS were the following countries: China, Germany, Japan, USA. In Ukraine the plan of development of the Combined energetic system for 2016–2025 years of SE «NEC «Ukrenergo»» provided the association of SPS power with electric nets of energy system with volume 1641.2 MW. There was realized the grouping of Ukrainian regions by the level of the technically achievable potential of solar energy. There was realized the assessment of the economic efficiency of products at using solar energy in the agroindustrial business in different regional conditions of Ukraine.

Natural resource management generally involves parties with conflicting interests and roles. The emergence of a negative issue on palm oil development in Indonesia heralded by NGOs and vegetable oil competitor countries, for some groups, is considered merely a trade war. The rapid development of Indonesia's oil palm has made this commodity a source of global vegetable oil as well as risen a controversy over its sustainability aspects covering environmental, socio-economic and health issues. The significant increase of palm oil research led to the need to enrich the study's discussion on the sustainability aspect and involved the participation of the related stakeholders. This study is an early stage of a research based on the environmental communication theory to identify the problems and analyze the stakeholders involved in palm oil governance in Indonesia by using stakeholder analysis tools. The methods of data collection in this study included literature review, text analysis, in-depth interviews as well as direct observations. The study finding shows that the Ministry of Agriculture as the main actor in palm oil governance in Indonesia is required to share its authority. This indicates that palm oil sustainability issue is not the responsibility of a particular ministry but has become a national issue that requires the participation and collaboration of all relevant stakeholders.

Potency of Agrriculture Sector as the Producer and the User of Renewble EnergyDevelopment of a dynamic world energy consumption within the limitation of fossil energy reserve as well as the awareness on the environmental conservation evoke the increase of interest on a renewable energy, especially a renewable energy resources from agriculture sector such as food crops, horticulture, estate commodities and animal husbandry. To be more specific, the main commodities are paddy, maize, cassava, coconut, palm oil, sugarcane, Jatropha curcas, sago, and large livestock (Cow/Cow waste). The potency of bio-energy derived from plant biomass residue of agriculture sector (without wood industry, maize) is around 441.1 GJ. At the same condition, in 2000, it is estimated roughly 430 million GJ or just about 470 million GJ if the residue of wood industry is included. Estimated that if the availability of bio-energy derived from the main production of agriculture commodity is calculated, so that Indonesia could provide bio-energy potentially amounted to 360.99 million GJ, therefore, the total amount would be around 802.09 million GJ. In contrast, the value is approximately equal to the continuous operating of more than 25 thousand units of electric power of renewable energy power for middle scale of 10 MW which is now being campaign. Agriculture sector is not only plays the role as the producer of a renewable energy, but also forms as a potential user. Alongside technology development of energy and agriculture sectors, the equivalent estimation between the production and the USAge of renewable energy in agricultural sector need to be studied continuously. This evaluation is useful to analyze the efficiency of agribusiness activities in Indonesia based on the improvement of national agriculture productivity and environmental conservation through renewable energy. RINGKASANPerkembangan kebutuhan energi dunia yang dinamis di tengah semakin terbatasnya cadangan energi fosil serta kepedulian terhadap kelestarian lingkungan hidup, menyebabkan perhatian terhadap energi terbarukan semakin meningkat, terutama pada sumber-sumber energi terbarukan di sektor pertanian seperti komoditi tanaman pangan, hortikultura, perkebunan dan peternakan. Secara lebih sempit lagi, diungkapkan komoditas-komoditas utamanya, yaitu padi, jagung, ubikayu, kelapa, kelapa sawit, tebu, jarak pagar, sagu serta ternak besar (sapi/kotoran sapi). Potensi bioenergi asal residu biomassa tanaman dari sektor pertanian (tanpa industri kayu kehutanan, jagung) adalah sekitar 441,1 juta GJ. Pada kondisi sama pada tahun 2000 diperhitungan sekitar 430 juta GJ, atau sekitar 470 juta GJ jika residu industri kayu dimasukkan. Jika diperhitungkan tersedianya bio-energi dari hasil pokok komoditas pertanian (nira, gula, minyaknya dll), maka diperkirakan Indonesia dapat menyediakan bioenergi secara potensial sejumlah 360,99 juta GJ, sehingga jumlah totalnya sekitar 802,09 juta GJ. Sebagai perbandingan, nilai tersebut kira-kira setara dengan pengoperasian terus menerus lebih dari 25 ribu unit pembangkit listrik tenaga energi terbarukan skala menengah ukuran 10 MW yang saat ini sedang dikampanyekan. Sektor pertanian selain sebagai penghasil energi terbarukan sekaligus merupakan pengguna potensial. Perhitungan keseimbangan antara produksi dan penggunaan energi terbarukan di sektor pertanian, perlu dikaji secara terus menerus, seiring dengan perkembangan teknologi di bidang energi dan pertanian. Evaluasi ini akan bermanfaat untuk menilai efisiensi kegiatan agribisnis di Indonesia dari segi peningkatan produktivitas pertanian nasional dan pelestarian lingkungan melalui energi terbarukan.

‘Embung' is one of the collected and served water constructions for domestic consumption, cattle drinking and irrigation in the border area and dry climate of Belu District, East Nusa Tenggara (ENT) Province. The others are water source from shallow soil-water digging and natural springs. There are 26 small ‘embungs' which have 11,700 – 96,830 m3 water volume and the biggest ‘embung' which has 1,860,000 m3 water volume; 276 springs, and some shallow soil-water digging. ‘Embungs' sustainability are influenced by some aspects such as technical problem since construction developed, utilization, social and management. Due to the natural resources and budget handicap, generally in one village just exist one type of the three water collected constructions. However, it is possible in one village there are three constructions, i.e.: ‘embung' is particularly for cattle drinking and irrigation; and the shallow soil-water digging and natural springs are specially for water domestic consumption. These man made and natural water source are very valuable to serve farmers in the Belu-ENT village area.