Articles
<![CDATA[IDENTIFIKASI HYPOXIA DI TELUK HURUN LAMPUNG ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Teknologi Lingkungan Vol. 6 No. 2 (2005): JURNAL TEKNOLOGI LINGKUNGAN ]]>
Publisher : <![CDATA[Center for Environmental Technology - Agency for Assessment and Application of Technology ]]>
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DOI: 10.29122/jtl.v6i2.340
<![CDATA[This study was carried out to describe the characteristics of hypoxia in the tropical coastal sea. The general oceanographic surveys were conducted two times in Hurun Bay, 5-7 February and 17-19 February, 2003. And also, a day-night survey (25 hours survey) and the continuous monitoring of water temperature, current and meteorology were carried out. The monitoringdata of water temperature indicated that the seasonal variation and the spatial in temperature in Hurun Bay were small. The difference in temperature between the surface and bottom water was less than 1.3 oC. The water temperature increased from February and the highest in April.It gradually decreased to late June and a sudden decrease occurred in the early July. The lowest temperature was observed in September and then it increased again. The seasonal variation in the thermal stratification was not happened. Instead of the weak thermal stratification, a sharp picnocline was formed around 20m in the dry season. The water below the picnoline was colder and more saline and contained less DO than the overlaying water. The cold water mass which has high salinity and lower DO was situated along bottom deeper than 20m on 17-19 July. The lowest DO in this water mass was 0.4 mg/l. Such a cold water mass appeared in early July and it propagated from offshore to the coast. The oxygen consumption rate of the water column was about 0.1 mgO2/L/hour in Hurun Bay. Comparing these oxygen consumption rates and the DO of water, if the oxygen supply was restricted, the water in Hurun Bay could become hypoxic easily.]]>
<![CDATA[PEMANTAUAN HIDROGRAFI DAN KUALITAS AIR DI TELUK HURUN LAMPUNG DAN TELUK JAKARTA ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Teknologi Lingkungan Vol. 6 No. 3 (2005): JURNAL TEKNOLOGI LINGKUNGAN ]]>
Publisher : <![CDATA[Center for Environmental Technology - Agency for Assessment and Application of Technology ]]>
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DOI: 10.29122/jtl.v6i3.349
<![CDATA[The present study, which was performed in Hurun Bay Lampung and Jakarta Bay, Indonesia, aimed to present the similar method using digital device Chlorotec, type AAQ1183, Alec Electronics for describing the characteristics of tropical coastal hydrography and water quality. The reason of selecting these two locations was to obtain a representation of different dissolved oxygen, temperature and turbidity levels. Jakarta Bay receives large amounts of nutrient-enriched waters, Hurun bay Lampung has moderate or small level of nutrient inputs of organic-polluted waters. The advantage of this method is the observation of field study able to hold with simply and accurately.]]>
<![CDATA[KUALITAS NUTRIEN PERAIRAN TELUK HURUN, LAMPUNG ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Teknologi Lingkungan Vol. 7 No. 2 (2006): JURNAL TEKNOLOGI LINGKUNGAN ]]>
Publisher : <![CDATA[Center for Environmental Technology - Agency for Assessment and Application of Technology ]]>
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DOI: 10.29122/jtl.v7i2.375
<![CDATA[Some rivers that flow into Hurun Bay waters, agriculture, fishery andhuman settlement and floating cage and oysters faming could benegative impact to waters organisms. Waters fertility is one of somefactors that support the action of determining waters quality. Somenutrient chemistry parameters (anmonia, nitrite, nitrate and phosphate)were analyzed base on specific methods for the parameters. Thenutrient concentrations were variated, for the parameters respectively,ammonia between 4.38 – 23.91 μg/L, nitrite 0.24 – 6.34 μg/L, nitratebetween 1.11 – 7.81 μg/L, and phosphate between 2.17 – 5.75 μg/L.At that moment, the nutrients concentrations were still good for marinewaters category. The environment condition at waters surrounding(river flow, agriculture, human settlement and fishery industry) did notinfluenced to nutrient concentrations.]]>
<![CDATA[KANDUNGAN ZAT HARA FOSFAT PADA MUSIM BARAT DAN MUSIM TIMUR DI TELUK HURUN LAMPUNG ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Teknologi Lingkungan Vol. 8 No. 3 (2007): JURNAL TEKNOLOGI LINGKUNGAN ]]>
Publisher : <![CDATA[Center for Environmental Technology - Agency for Assessment and Application of Technology ]]>
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DOI: 10.29122/jtl.v8i3.426
<![CDATA[The result of phosphate analysis in Hurun Bay Lampung described thatconcentration phosphate in the West season was greater than in the East season. In the February 2003, phosphate concentration was 9.51±1.54 ì g/L while in July 2003 around 6.32±3.8 ì g/L. The phosphate dissociation and phosphate run-off from land through river may increase phosphate concentration in West season. The other result shows that phosphate concentration in the surface was higher than in the bottom layer in the all season.]]>
<![CDATA[TEKNOLOGI KONSERVASI DAN REHABILITASI TERUMBU KARANG ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Teknologi Lingkungan Vol. 9 No. 3 (2008): JURNAL TEKNOLOGI LINGKUNGAN ]]>
Publisher : <![CDATA[Center for Environmental Technology - Agency for Assessment and Application of Technology ]]>
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DOI: 10.29122/jtl.v9i3.465
<![CDATA[Indonesia’s rich supplies of corals and reef fish are endangered by destructive fishing practices. Cyanide and blast fishing are widespread throughout the archipelago even in protected areas. Indonesian reefs are also subject to various pressures from inland activities. Forestation and other land-use changes have increasedsediment discharge onto reefs, and pollution from industrial effluents, sewage, and fertilizer compounds the problem. Cumulatively, these pressures appear to have significantly degraded Indonesia’s reefs over time. Unfortunately, Indonesia has only limited monitoring. Few reefs are regularly studied, making the assessment of condition and change for the country quite difficult. Currently, most monitoringmindicates clearly that reef condition is declining. This article showed the status, biology, and monitoring-rehabilitation method of coral reef in Indonesia.]]>
<![CDATA[MICROALGAE FOR CO2 REDUCTION AND WASTEWATER TREATMENT APPLICATION IN INDUSTRIAL AREA ]]>
<![CDATA[Arif Dwi Santoso]]>;
<![CDATA[Rahmania A. Darmawan]]>;
<![CDATA[Joko P. Susanto]]>
<![CDATA[ Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 3 No. 2 (2011): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis ]]>
Publisher : <![CDATA[Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University ]]>
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DOI: 10.29244/jitkt.v3i2.7822
<![CDATA[The microalgae incorporated photobioreactor (PBR) is a highly efficient biological system for converting carbon dioxide (CO2) gases into biomass and treating wastewater. In this study, the freshwater microalgae Chlorella sp. was cultured in two unit photobioreactors which were connected to a boiler of dairy factory. The source of water for microalgae culture media (in the photobioreactors) are collected from the waste water treatment plant of the dairy factory itself. The objective of this microalgae photobioreactor activity were to reduce CO2, produce biomass and as a part of a waste water treatment in a dairy industry in Indonesia. Both photobioreactors were operated for 14 days culture interval in the semi continuous cultivation, with initial stocking rate of 2 x 105 cells/ml microalgae. Carbon dioxide concentration from the boiler stack was 10-11 % vol. The photobioreactors were injected with the specified CO2 concentration with flow rate of 2 l/min. and 1.5 l/min. The result showed that microalgae photobioreactors capability in CO2 absorption were 0.78 ± 0.25 and 0.92 ±0.36 g CO2/l media/day, respectively. Before and after utilized by the photobioreactors system, Nitrate and Phosphate concentration of the culture media (supplied from the waste water treatment plant) decreased from 3-4 mg/l to 0.05-0.1 mg/l. After 14 days cultivation, biomass concentration of microalgae which were injected with CO2 flow rate of 2 l/min. and 1.5 l/min. were 19 x 106 cells/ml and 15 x 106 cells/ml respectively. Results showed that microalgal photobioreactors operated in an industrial area could reduce CO2 concentration and produce biomass.Keywords: photobioreactor (PBR), Chlorella sp., CO2 flue gas emissions, wastewater]]>
<![CDATA[BAHAN ORGANIK TERLARUT DALAM AIR LAUT ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Rekayasa Lingkungan Vol. 6 No. 2: Jurnal Rekayasa Lingkungan ]]>
Publisher : <![CDATA[BPPT ]]>
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DOI: 10.29122/jrl.v6i2.1924
<![CDATA[Seawater contains high amounts of organic material and ions causing high salinity.The distribution of nutrients in the ocean is determined by ocean circulation, biological processes of uptake and mineralization, and subsequent regeneration of nutrients by migration of animals and by supply from the land.Topic related to sea water is important to discuss and to be a challenging with many researchers in Indonesia. In this paper, organic mater from sea water was learned in detail. The information contained of formulation history, justifi cation, distribution, advantages, and method of measure, type and effect to environment.Keywords: organic material, sea water, dissolved]]>
<![CDATA[PEMANENAN MIKROALGA DENGAN METODE SEDIMENTASI ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Rekayasa Lingkungan Vol. 10 No. 1 (2017): Jurnal Rekayasa Lingkungan ]]>
Publisher : <![CDATA[BPPT ]]>
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DOI: 10.29122/jrl.v10i1.2116
<![CDATA[Peraturan Presiden No.5/2006 tentang Kebijakan Energi Nasional menargetkan penggunaan energi terbarukan yang berbahan bakar nabati (BBN) seperti bioetanol dan biodiesel adalah sebanyak 5% pada tahun 2025. Peraturan inilah yang mendasari upaya pengembangan BBN biodiesel terutama dari biomassa alga sebagai salah satu bahan biodiesel yang paling potensial. Pada proses produksi biodiesel alga, sub proses pemanenan memegang peranan yang penting. Proses pemanenan relatif sulit dan memakan biaya opersional yang tinggi. Pada paper ini akan diulas proses pemanenan alga dengan metode sedimentasi. Bahasan difokuskan pada uraian proses sedimentasi, peranan proses sedimentasi dalam sistem produksi biomassa dalam fotobioreaktor, dan faktor-faktor yang mempengaruhi proses sedimentasi. Hasil dari paparan makalah ini diharapkan akan menghasilkan informasi yang obyektif tentang proses pemanenan alga bagi para praktisi alga dan khalayak ramai.Kata kunci : Biomassa, mikroalga, sedimentasi, bahan bakar nabati (BBN)]]>
<![CDATA[POTENSI DAN KENDALA PENGEMBANGAN SAGU SEBAGAI BAHAN PAKAN, PANGAN, ENERGI DAN KELESTARIAN LINGKUNGAN DI INDONESIA ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Rekayasa Lingkungan Vol. 10 No. 2 (2017): Jurnal Rekayasa Lingkungan ]]>
Publisher : <![CDATA[BPPT ]]>
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DOI: 10.29122/jrl.v10i2.2852
<![CDATA[Instruksi Presiden No. 20 Tahun 1979 tentang Diversifikasi Panganmenargetkan adanya bahan pangan lain selain beras yang dapat memenuhikebutuhan karbohidrat nasional secara mandiri. Produk pangan yangberpotensi mengakomodasi inpres tersebut adalah sagu. Sagu merupakantanaman asli Indonesia yang mempunyai potensi besar sebagai penyuplaikebutuhan karbohidrat Indonesia sebagai pengganti beras. Potensinya yangbesar juga berlaku sebagai sumber pakan ternak, sumber bahan panganindustri, dan sumber energi. Sagu juga terkenal sebagai bahan panganmasa depan yang ramah lingkungan karena pembudidayaannya relatif tidakmerusak lingkungan. Namun pada kenyataannya adalah perkembangansagu masih lambat dibanding produk pangan lainnya. Paper ini akanmengulas tentang potensi sagu yang dapat dikembangkan untuk berbagaikepentingan serta mengulas hambatan-hambatan yang ditemui pada upayapengembangan sagu di lapangan. Hasil dari paparan makalah inidiharapkan akan menghasilkan informasi yang obyektif kepada masyarakat,para peneliti dan para pihak lain yang berkompeten terhadap sagu diIndonesia.kata kunci : sagu, pangan, potensi, hambatan, indonesia]]>
<![CDATA[PENERAPAN BIAYA LINGKUNGAN DALAM PERLINDUNGAN SUMBERDAYA ALAM DAN KELESTARIAN LINGKUNGAN ]]>
<![CDATA[Arif Dwi Santoso]]>
<![CDATA[ Jurnal Rekayasa Lingkungan Vol. 11 No. 1 (2018): Jurnal Rekayasa Lingkungan ]]>
Publisher : <![CDATA[BPPT ]]>
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DOI: 10.29122/jrl.v11i1.3002
<![CDATA[Pada dekade belakangan ini, perusahaan dituntut untuk ikut andil dalam perlindungan lingkungan dan bertanggung jawab terhadap kondisi sosial masyarakat di sekitar perusahaan. Dampak dari aktivitas produksi atau jasa suatu perusahaan dapat menimbulkan berbagai masalah lingkungan yang merugikan berbagai pihak. Hal ini merupakan suatu beban sosial, yang harus diatasi bersama secara serius. Tanggung jawab perlindungan lingkungan oleh perusahaan otomatis akan berdampak pada kinerja keuangan perusahaan akibat dengan bertambahnya biaya operasional. Pencatatan dan perhitungan biaya akibat pengelolaan lingkungan merupakan sebuah konsep yang membantu perusahaan dalam mengatur dan memperkirakan dampak-dampak bisnis dalam bentuk penyederhanaan unit moneter. Konsep ini dikenal dengan Akuntansi Manajemen Lingkungan yang memfokuskan pada bantuan perusahaan dalam permasalahan lingkungan dengan mencatat seluruh aktivitas produksinya untuk dilaporkan dalam laporan biaya lingkungan perusahaan. Makalah ini akan mengulas secara detail tentang pengelolaan akutansi manajemen lingkungan pada suatu perusahaan. Pembahasan akan mengupas tentang pengertian,model dan pengukuran dana lingkungan yang efektif.kata kunci: akutansi manajeman lingkungan, biaya lingkungan, perusahaan]]>
