Judul: Energy Management System Implementation Strategy at PT Freeport Indonesia’s Concentrating Divion based on ISO 50001:2018
Abstrak: Energy is one of the basic human needs that support all activities. The entire system and dynamics of human and state life depend on energy as the lifeblood of all sectors, resulting in world energy consumption increasingevery year in line with the development of human civilization. so that energy must be managed and utilized properly and efficiently. The Government of Indonesia regulates energy management through PPNo.70 of 2009 and Minister of Energy and Mineral Resources Regulation No. 14 of 2012 concerning energy management, which in this regulation emphasizes all users of energy sources and energy users who use energy greater than or equal to 6,000 tons of oil equivalent (TOE) are required to carry out energy management. PT Freeport Indonesia (PTFI) as an energy user in mining operations in Indonesia is required to implement an energy management system because it uses energy more than 6000 TOE. Based on this background, the objectives of this study are: (1) to analyze the current level of implementation of the energy management system that has been carried out by the PTFI Concentrating Division; (2) analyze the comparison of the Concentrating Division's energy management system with the ISO 50001:2018 standard; and (3) formulate a strategy for implementing an energy management system according to the ISO 50001:2018 standard at the PT Freeport Indonesia Concentrating Division processing plant. The method in this study uses gap analysis (gap and IPA) and analytical hierarchy process (AHP). The primary data was obtained from interviews and questionnaires by six respondents from the energy management system expert in the Concentrating Division, while the secondary data came from audit reports and PTFI internal data. The research was conducted at PTFI's concentrate processing plant from June to September 2022. The implementation strategy is formulated based on the results of a comparison of the performance level of the energy management system with the 7 clauses of ISO 50001:2018 and their level of importance. The results obtained are 7 clauses that do not meet the standards and 3 clauses of which have a high level of importance but low performance levels to be handled with four different strategies:(1) conducting internal audits and external energy audits; (2) energy management system training; (3) carrying out activities energy efficiency-oriented production;and (4) using automation systems and technology on equipment.
Keyword: AHP, Concentrate Processing Plant, Energy Management System, Gap Analysis, ISO 50001:2018

Judul: The study of electrical energy conservation management for planning and controlling at PT. PHE.
Abstrak: The purpose of this paper is to address the issue of electrical energy consumption through case studies as a sample of buildings on a PT. PHE. This study analyzes energy consumption profile, Energy Consumption Intensity (ECI), electricity quality, building envelope systems, HVAC, lighting systems, energy conservation opportunity and energy conservation management. This study uses energy audit method, ECI analyze, energy conservation opportunity, financial assessment and feasiblity study of energy conservation. The result of this study indicated that the consumption of electrical energy in PT. PHE tended to decline in 2012. The average of electricity consumption amounted to 446,191 kWh with an average cost each month of 355,288,895 rupiah. ECI values was 12.45 kWh/m2/month, it is quite efficient category. The electricity quality systems generally meet the standard. Except the maximum value of current unbalance and harmonics are higher than standard, that are caused by an unbalance of the load factor at the transformer 2. Both of the energy audit on the overall transfer thermal value 29.45 kWh/m2 and HVAC systems are accordance with the Indonesian National Standard. But energy efficiency still can be upgraded simply by turning on the air conditioning or chiller mechine 1 hour before work and turn off 30 minutes before the end of working hours. The estimate cost saving of this implementation is 260,231,400 rupiah. Energy audit of lighting systems shows the power intensity of lighting which still meet with standards. However, the intensity of illumination is lower than standard. Therefore, the recommendation to retrofitting TL 36 watt with 18 watt tube LED, TL 18 watt with LED 9 watt tube, PLC 14 watt with 9 watt LED, turning off the lights in the lobby when outside lighting is sufficient. If the recommendations are implemented, it will save an amounted cost 128,922,300 rupiah per year. In order towards profitable energy conservation investment, it is recommended to invest with internal corporate capital. this energy conservation program must be supported by energy management systems. The tools utilized to analyzed energy management model is a matrix of energy management. It has six main pillars consisting of policy and system, organization of energy, motivation, information systems, and investment promotion. Based on the results of research, the status of implementation of SME in PT . PHE is at level 1 .
Keyword: energy conservation management, energy audit, energy efficiency

Judul: Ornithonyssus Bursa (Berlese, 1888) Famili Macronyssidae yang Menyerang Unggas Dan Penaggulangannnya
Abstrak: Ornithonyssus bursa adalah tungau penghisap darah pada unggas di daerah tropis dan subtropis. Tungau ini relatif kecil, dengan panjang tubuh antara 700-1000 mikron dan lebarnya 250-490 mikron. Tubuhnya bulat berwarna coklat kekuningan sebelum menghisap darh dan berwarna merah setelah menghisap darah dari induk semangnya.
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