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"The presence of sulphur compounds in natural gas can interfere to the quality of natural gas. The decline of combustion gas capacity, metal instrument corrosion in gas piping, and the environmental pollution from gas emission can affect by their presence. Bio-filter is one of the methods that selected to reduce sulphur content in natural gas. A lab scale study of hydrogen sulphide reduction in natural gas had conducted in oil and gas field using bio-filter method. The bio-filter system (±1 L volume) contains an active carbon and thiosulphide medium as a substrate, Thiobacillus thioparus as a single culture of sulphur bacteria, and Thiobacillus thioparus with sludge as a mixed culture of sulphur bacteria. The study of hydrogen sulphide reduction was conducted with continuous flow line process. The gas flow rate approximately 1.5 L/min with a fluctuate presence of Hydrogen sulphide (approximately 40 - 70 mg/L). The bio-filter system contains active carbon, thiosulphide medium, and single culture of T. thioparus appear as a good filter for hydrogen sulphide reduction. During 24 hours, the hydrogen sulphide reduction obtains 93% to 16%. When culture media added, the hydrogen sulphide reduction will increase almost 60% and then the reduction decrease to 4% after 20 hours. It is concluded that the bio-filter have potential to develop for sulphur reduction in natural gas."

"[Blowout dan muncul serta tersebarnya gas Hidrogen Sulfida merupakan bahaya khusus dari kegiatan pemboran (NIOSH, 1983). Sehingga dibutuhkan petugas khusus untuk penanganan bahaya paparan gas H2S yang disebut H2S engineer yang melakukan pekerjaan H2S Safety Monitoring. Pekerjaan ini berisiko tinggi sehingga H2S Engineer dituntut memiliki pengetahuan yang lebih mendalam tentang bahaya paparan gas H2S serta pengendaliannya. Tesis ini membahastentang evaluasi pengetahuan kerja H2S Engineer pada pekerjaan H2S safety monitoring di PT.DE. Tujuannya adalah untuk mengetahui dan mengevaluasi gambaran pengetahuan kerja H2S engineer pada pekerjaan H2S safety monitoring. Penilaian pengetahuan dilakukan dengan memberikan kuesioner tentang pengetahuan kerja h2s safety monitoring kepada 30 orang h2s engineer PT.DE. Berdasarkan hasil penelitian diketahui tingkat pengetahuan kerja H2S Engineer masuk dalam kategori tingkat pengethauan sedang, boleh dikatakan belummaksimal. Dengan adanya gambaran tingkat pengetahuan kerja H2S Engineer diharapkan nantinya dapat dilakukan perbaikan yang dapat meningkatkan prestasi kerja perusahaan maupun H2S Engineer itu sendiri. Diperlukan pelatihan rutin, supervisi, serta penelitian-penelitian untuk mengetahui perkembangan pengetahuan kerja H2S Engineer secara berkala.;Blowout and H2S poison gas release both are specific hazard for drilling activities (NIOSH, 1983). Its important to required special personnel as a H2S Engineer to provide H2S Safety Monitoring work at drilling site. H2S Engineer must have a good working knowledge about H2S Safety Monitoring work related the high risk job. This thesis discusses the evaluation of H2S Engineer job knowledge in H2S safety monitoring work. Research conducted at PT. DE as a H2S safety monitoring services company. The objective is to describe the job knowledge of H2S Engineer. Assessment conducted by distributing questionnaires about H2S Safety Monitoring work to all of H2S Engineer PT.DE. Based on the results of research known levels of H2S Engineer working knowledge in the category of medium-level knowledge, arguably not maximized. The level of working knowledge H2S Engineer expected to improving company performance and H2SEngineer itself. Required regular training, supervision, and research to determine the development of H2S Engineer working knowledge regularly.;Blowout and H2S poison gas release both are specific hazard for drilling activities(NIOSH, 1983). Its important to required special personnel as a H2S Engineer toprovide H2S Safety Monitoring work at drilling site. H2S Engineer must have agood working knowledge about H2S Safety Monitoring work related the high riskjob. This thesis discusses the evaluation of H2S Engineer job knowledge in H2Ssafety monitoring work. Research conducted at PT. DE as a H2S safetymonitoring services company. The objective is to describe the job knowledge ofH2S Engineer. Assessment conducted by distributing questionnaires about H2SSafety Monitoring work to all of H2S Engineer PT.DE. Based on the results ofresearch known levels of H2S Engineer working knowledge in the category ofmedium-level knowledge, arguably not maximized. The level of workingknowledge H2S Engineer expected to improving company performance and H2SEngineer itself. Required regular training, supervision, and research to determinethe development of H2S Engineer working knowledge regularly;Blowout and H2S poison gas release both are specific hazard for drilling activities(NIOSH, 1983). Its important to required special personnel as a H2S Engineer toprovide H2S Safety Monitoring work at drilling site. H2S Engineer must have agood working knowledge about H2S Safety Monitoring work related the high riskjob. This thesis discusses the evaluation of H2S Engineer job knowledge in H2Ssafety monitoring work. Research conducted at PT. DE as a H2S safetymonitoring services company. The objective is to describe the job knowledge ofH2S Engineer. Assessment conducted by distributing questionnaires about H2SSafety Monitoring work to all of H2S Engineer PT.DE. Based on the results ofresearch known levels of H2S Engineer working knowledge in the category ofmedium-level knowledge, arguably not maximized. The level of workingknowledge H2S Engineer expected to improving company performance and H2SEngineer itself. Required regular training, supervision, and research to determinethe development of H2S Engineer working knowledge regularly, Blowout and H2S poison gas release both are specific hazard for drilling activities(NIOSH, 1983). Its important to required special personnel as a H2S Engineer toprovide H2S Safety Monitoring work at drilling site. H2S Engineer must have agood working knowledge about H2S Safety Monitoring work related the high riskjob. This thesis discusses the evaluation of H2S Engineer job knowledge in H2Ssafety monitoring work. Research conducted at PT. DE as a H2S safetymonitoring services company. The objective is to describe the job knowledge ofH2S Engineer. Assessment conducted by distributing questionnaires about H2SSafety Monitoring work to all of H2S Engineer PT.DE. Based on the results ofresearch known levels of H2S Engineer working knowledge in the category ofmedium-level knowledge, arguably not maximized. The level of workingknowledge H2S Engineer expected to improving company performance and H2SEngineer itself. Required regular training, supervision, and research to determinethe development of H2S Engineer working knowledge regularly]"