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INDONESIA
Jurnal Rekayasa Lingkungan
Published by Badan Pengkajian dan Penerapan Teknologi
ISSN : -     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 589 Documents
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PENCAHAYAAN RUANG ARSITEKTUR DENGAN FIBER OPTIC SEBAGAI ALTERNATIF PENCAHAYAAN ALAMI DAN PEMANFAATAN ENERGI TERBARUKAN Anggoro, Suryo
Jurnal Rekayasa Lingkungan Vol 4, No 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Natural daylighting methods for building commonly used windows and facade openings to let sunlight inside the interior of building. Hence, light quality received sometimes inadequate and unoptimal which caused natural lighting being replaced by artifi cial (electric) lighting that lead into dependency of electrical lighting. Fiber optic has a capability of transmitting optical wave including sunlight which already collected throught concentrating sunlight collector. Through fi ber optic sunlight transmitted inside building with better intensity and improved quality than artifi cial produced light.Key words: daylighting, fi ber optic
KARAKTERISTIK FISIK DAN TINGKAT BAHAYA EROSI TANAH ULTISOL sudaryono, Sudaryono
Jurnal Rekayasa Lingkungan Vol 5, No 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Soil erosion is a major factor leading to cause land damage in the upstream region. Therefore, erosion control should be done in the preservation of land resources and the environment can be maintained and the welfare of farmers can be improved. Land Ultisol widespread in many Kalimatan Islands, ultisol soil types other than guilty of fertility, soil types have the property ultisol easy erosion. As a result of coal mining activities carried out by PT KPC lead to peeling layers of top soil to the depth of rock. This stripping has directly changed the soil condition. Ultisol soil physical conditions in Kalimanan (available water capacity, density lumps, texture, structure, pore space and permeability of the soil) are relatively low, so they need to improve theaddition of organic materials, and lime. The process of reclamation of former coal mining PT. KPC has been done very well. The analysis of fertility levels and the amount of potential soil erosion occurs indicates that the post-miningrehabilitation revegetation way to post-mining land with the procedure referred. It can be seen from the parameters of soil fertility and erosion rates of post-mining land have been rehabilitated (56.5614 erosion rates tons/hectare/year) with areas of pristine forests (erosion rates 52.175 tons/hectare/year) were not show significant changes.Keywords: ultisol, rehabilitation, physical soil, erosion
PENINGKATAN NILAI NUTRISI LIMBAH LUMPUR MINYAK SAWIT SEBAGAI PAKAN TERNAK Akhadiarto, Sindu
Jurnal Rekayasa Lingkungan Vol 6, No 2: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Indonesia is the largest country that has oil palm plantations, covering 7.3 million ha area (2009), with production of 19.4 million tonnes of crude palm oil (CPO) which is expected to palm oil sludge waste as much as 1.94 million tons/year. Palm oil sludge waste is one alternative to potential animal feed ingredients. The low nutritional value and high fiber content causes palm oil sludge requires special treatment before given to animal. The fermentation process is able to increase the nutritional value of the palm oil sludge, such as increasing levels of crude protein and energy metabolism, and also may reducing content of coarse fiber. This fermentation product can be stored at room temperature for 12 weeks without experiencing significant changes in nutritional value. The usage limit of palm oil sludge which is recommended for poultry is 15%. The optimum limit of palm oil sludge in the diets of goats and sheep is 47% and 40% for cows (in concentrate). The use of rice bran on ruminants can be replace entirely by the palm oil sludge. Fermentation techniques can be done to improve the nutritional value of the palm oil sludge, but this technique needs to be studied economically, such as: during the drying process (because of the high content of LMS), and the quite expensive fermentation. Another technique to minimize costs has been done, for example by utilizing the available energy sources in the plant oil.Keywords: palm oil sludge, nutritive values, ruminant, poultry, fermentation.
JURNAL REKAYASA LINGKUNGAN Lingkungan, Jurnal Rekayasa
Jurnal Rekayasa Lingkungan Vol 11, No 1 (2018): Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

XYLANASE, AN ENVIRONMENTALLY FRIENDLY BLEACHING AGENT FOR PULP AND PAPER: CHARACTERIZATION AND STABILIZATION STUDY OF BACILLUS LICHENIFORMIS I-5 CRUDE XYLANASE Wahyuntari., dkk, Budiasih
Jurnal Rekayasa Lingkungan Vol 7, No 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Isolate I-5 was isolated from Ciseeng hot spring, West Java and was identified as Bacillus licheniformis I-5. The isolate produces extracellular xylanolytic enzymes on Oatspelt containing Luria broth agar medium. Optimal activity of the crude enzyme was  observed at 50ºC and pH 7. The effect of sodium dodecyl sulphate, b-mercaptoethanol and Triton-X100 were observed. Incubating the crude enzyme in 1.5% SDS and 1.5% b-mercaptoethanol at 50oC for 90 minutes then adding Triton-X100 at final concentration of 3.5% for 45 minutes only reduced 5.75% of the initial enzyme activity. SDS/PAGE and zymogram analysis showed that at least two xylanolytic enzymes presence in the crude enzyme. The molecular weight of the enzyme was estimated about 127 and 20kD. The enzyme hydrolysed xylan into xylobiose, xylotriose and other longer xylooligosaccharides. Thermal stability of the crude enzyme was observed at 50, 60, and 70oC and pH 7 and 8. The results showed that the half time of the crude enzyme incubated at 50, 60, and 70oC pH 7 was 2 hours 55 minutes; 2 hours 33 minutes and 1 hour 15 minutes respectively. The half time at 50, 60 and 70oC, pH 8 was 2 hours 48 minutes; 1 hour 22 minutes and 1 hour 9 minutes respectively.keywords: Xilanase, Bacillus licheniformis I-5, thermal stability
AKLIMATISASI BENUR UDANG WINDU (PENAEUS MONODON) SEBAGAI UPAYA BUDIDAYA DI LUAR LINGKUNGAN HIDUPNYA: SEBUAH KASUS DI KABUPATEN LAMONGAN Maryadi, Maryadi
Jurnal Rekayasa Lingkungan Vol 4, No 2: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Penaeus monodon or tiger prawn is the most prominent farmed crustacean product in international trade and has driven a signifi cant expansion in aquaculture in many developing countries in Asia. Market prices during its early development were quite good due to little competition and strong demand from the international markets, mainly Japanese market. Culture technology in inland areas has been improved using a very minimal amount of seawater (only 2-3ppt) and closed systems to prevent salinization offreshwater resources. The model of culturing commercial tiger prawn on minimal amount of seawater in Lamongan Regency was applied since 1987.Key words : benur udang windu, Peneaeus Monodon
APPLICATION OF BIOFILTER TECHNOLOGY FOR THE TREATMENT OF OFFICE BUILDING DOMESTIC WASTEWATER ikbal, Ikbal
Jurnal Rekayasa Lingkungan Vol 9, No 2 (2016): Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

KAJIAN AIR TANAH DENGAN TEKNOLOGI GEOLISTRIK DI DESA PAD ANG KABUPATEN TANAH LAUT Prayogo, Teguh
Jurnal Rekayasa Lingkungan Vol 5, No 2: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Groundwater is water that located beneath surface. The water moves down into the ground because of gravity, passing between particles of soil, sand, gravel, or rock until it reaches a depth where the ground is fi lled, or saturated, with water. Groundwater is stored in the ground in materials like gravel or sand. To meet a demand of drinking water in the Padang Area, groundwater is one ofsolution to overcome a problem of the need of drinking water, because the availability of surface water is not suffi cient. In this paper, it will be discussed concerning characteristic and condition of ground water by applying geoelectrical technology in Padang Area, Tanah Laut district, South Kalimantan Province. Based on the result of survey in fi eld, data processing, and modeling, it can be interpretated that the existence of potential aquifer in Padang area is occupied between 15 ? 40 meter and above 130 meter depth.Keywords : Groundwater, geophysical technology
PENGEMBANGAN PROTOTIPE TEKNOLOGI BUDIDAYA IKAN NILA UNGGUL TERINTEGRASI DI LINGKUNGAN PERAIRAN TAMBAK Aliah, Ratu Siti; Sachoemar, Suhendar I
Jurnal Rekayasa Lingkungan Vol 10, No 1 (2017): Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Ikan nila unggul monosex jantan ?GESIT (Genetically Supermale Indonesian Tilapia) dan turunannya (GMT = Genetically Male Tilapia)? yang dihasilkan BPPT bekerjasama dengan IPB dan DKP merupakan produk unggulan yang telah di luncurkan (lauching)  oleh Menteri Kelautan dan Perikanan pada bulan Desember 2006. Ikan nila unggul ini dapat diandalkan untuk dimanfaatan pada lahan tambak terbengkalai yang luasnya tidak kurang dari 1,2 juta ha dan baru dimanfaatkan sebesar 37,5 %. Dengan memanfaatkan Teknologi Budidaya Terintegrasi bersama udang, kekerangan dan rumput laut Glacilaria, kapasitas produksi ikan nila unggul dan produtivitas lahan tambak terbengkalai dapat ditingkatkan secara berkelanjutan (sustainability). kata kunci : prototipe teknologi budidaya ikan nila unggul terintegrasi, lingkungan perairan tambak
JURNAL REKAYASA LINGKUNGAN Lingkungan, Jurnal Rekayasa
Jurnal Rekayasa Lingkungan Vol 11, No 2 (2018): Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Page 34 of 59 | Total Record : 589

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