Judul: Kajian Peluang Implementasi Produksi Bersih Di Industri Pengolahan Karet (Studi Kasus di PT Condong Garut)
Abstrak: Rubber processing industry uses the resources of large amounts of water. This causes the rubber industry has to deal with various types of wastes in the form of liquid and solid wastes and the generation of waste gas of pungent odor. Environmental problems, as a result of these activities can be minimized by applying cleaner production. Cleaner production aims to increase the efficient use of raw materials, minimize waste and the risk of direct contamination at the source. The cleaner production alternatives which are potential to be applied are good housekeeping, collects rubber particles in rubber trap, use of coagulant antibacteria, and giving incentive for industry that apply cleaner production. The total investment of these option is Rp 660.000,- with payback period (PBP) of 0,28 bulan. The use Liqiud Smoke may reduce the RSS processing cost around 17,6%, and avoid carbon dioxide pollution. The results of AHP suggests that the environment is the most important factor in the implementation of cleaner production and the most important actor is the industry. Strategy to implement good housekeeping is the most important strategies that are generated from the AHP. This result indicates the similarity of field data analysis and expert survey that good housekeeping is the most important proper strategy for implementing cleaner production at PT Condong Garut.
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Judul: iKajian Produksi Bersih pada Kawasan Industri Penyamakan iiKulit di Garut
Abstrak: Leathers is one of livestock products that being expensive commodity today. Positively, leather tanning industry gives benefit to the peoples around industry, however, improper handling of wastes may pollutes the environment around tanning industrial estate. Cleaner production strategy is needed to minimize the wastes. This research was directed to identify the opportunity implementation of cleaner production strategy on leathers tanning industry at Sukagerang, Garut and to determine the possible alternatives of cleaner production options to increase production efficiency while minimizing the wastes. Analysis of Cleaner production conducted in three industries, PT ELCO Indonesia, PT Karya Lestari Mandiri, and PD Putra Setra. Quick Scan method used to analyzed the cleaner production. The results were then analyzed by using Exponential Method Comparison (MPE) and method of Analytical Hierarchy Process (AHP) to determine the priority of cleaner production application. Priority selection of cleaner production alternatives in leather tanning industry estate was analyzed based on the environmental criteria, benefits, construction, operation, and cost. The best alternative priority to be applied in leather tanning was controlling of water use then followed by trimming process before chemical treatment, breeders assisting, retribution for waste treatment, and the socialization of research results. In the case study of water use at PD Putra Setra, 87,800 Liters water can be reduce. While in the case study of trimming process at PT ELCO Indonesia, this alternative may result in the benefit to the company in the form of savings for the purchase of chemicals of 16.82% or equivalent to Rp 197,103.
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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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