Judul: Aplikasi produksi bersih pada industri minyak sawit (studi kasus di PT.X Propinsi Riau)
Abstrak: Kelapa sawit merupakan salah satu komoditas yang memiliki prospek cerah karena dapat tumbuh baik di daerah beriklim tropis. Konsumsi dunia terhadap minyak sawit terus meningkat, data oil world menunjukkan bahwa konsumsi minyak sawit mencapai 21,5% dari konsumsi minyak nabati dunia pada tahun 2003-2007 dengan total produksi 108.512.000 ton. Peningkatan produksi dan konsumsi dunia akan minyak sawit menyebabkan peningkatan aktivitas produksi minyak sawit. Pada proses produksi minyak sawit, setiap ton tandan buah segar (TBS) yang diolah menghasilkan effuen sebanyak 0,6 m3.
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Judul: Kajian Peluang Aplikasi Produksi Bersih di Industri Kelapa Sawit. Studi Kasus di PT Perkebunan Nusantara IV (Persero) Unit Usaha Adolina-Perbaungan, Sumatera Utara
Abstrak: Palm oil mill is one of the most important industries that supporting the Indonesian’s economy in vacancy of employment, the provision of industrial raw materials, development, and sources of national revenue from non-gas sector. Palm oil mill produces CPO (Crude Palm Oil) and PKO (Palm Kernel Oil). Environmental pollution is one of consequence from palm oil mill that needs special concern. This condition can make a dangerous effect for human and environment. Cleaner production is one of the efforts to improve effectiveness, efficiency of the process, and minimize waste. This research identifies the alternatives recommended of cleaner production in palm oil mill using the case study of palm oil mills at PT Perkebunan Nusantara IV (Persero) Unit Usaha Adolina. The focus of the analysis is done by looking at the financial aspects of the implementation of the recommended alternative. Determination of priorities to be carried out by AHP (Analytical Hierarchy Process) from experts. The analysis showed that implementation of recommended alternative provide some benefits. The application of good house-keeping will give financial gain Rp. 1.8941 billion/year, process modification will provide Rp. 0.2843 billion/year, and on-site reuse of Rp. 1.6934 billion/year. Alternative assessment of AHP seen from technical factors, economic, and environmental. The priority of alternative that will be implemented are optimization Standar Operational Procedure (0.179), efficiency of water use (0.167), good operating procedures (0.152), use of palm oil mill effluent as biogas (0.152), optimizing the utilization of EFB (0.116), FFA controlling (0.104), collecting split oil by making condensate pond (0.083), and the last is preventing contaminant of FFB (0.046).
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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