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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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KAJIAN KARAKTERISTIK PERAIRAN TELUK SEMARANG UNTUK MENDUKUNG RENCANA PEMBANGUNAN DAM LEPAS PANTAI Wibowo, Mardi
Jurnal Rekayasa Lingkungan Vol 11, No 1 (2018): Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

aat ini pesisir Teluk Semarang mengalami berbagai permasalahan yang sangat kompleks. Permasalahan tersebut adalah rob dan banjir, penurunan muka tanah, dan abrasi pantai. Untuk mengatasi permasalahan tersebut telah banyak konsep diusulkan dan yang paling mengemuka adalah konsep dam lepas pantai dan sabuk/ tanggul pantai sepanjang garis pantai. Untuk merencanakan pembangunan dam lepas pantai ataupun sabuk/ tanggul laut diperlukan data dan informasi terkait kondisi dan karakteristik perairan laut padahal data dan informasi terkait hal tersebut masih sangat terbatas. Oleh karena itu diperlukan survei dan kajian kondisi karaktersitik perairan laut di Teluk Semarang. Metodologi kajian ini adalah dengan mempelajari data hasil penelitian terdahulu, melakukan survey lapangan dan pengambilan sampel sedimen dasar dan sedimen layang serta melakukan analisis di laboratorium. Berdasarkan hasil kajian ini diketahui bahwa kualitas air laut di Semarang secara umum memenuhi baku mutu untuk kegiatan pembangunan pelabuhan, sedangkan untuk kegiatan wisata terdapat beberapa parameter yang melebihi baku mutu terutama yangberada di dekat muara sungai. Kondisi hidro-oseanografi perairan laut di Semarang adalah kecepatan arus kurang 50 cm/dt dengan arah dominan ke barat dan barat daya, kedalaman kawasan kajian mencapai -17 m, tipe pasang surut campuran dominan ke harian ganda. Konsentrasi sedimen melayang di peraiaran laut lepas berkisar 0,028 ? 0,063 gr/l dan di sekitar muara berkisar antara 0,036 ? 0,079 gr/l. Sedimen dasar tergolong pasir halus dengan d50 berkisar antara 0,1 ? 0,23 mm.kata kunci : dam lepas pantai, kualitas air laut, hidrooseanografi
EXERGY ANALYSIS OF GEOTHERMAL POWER PLANT KAMOJANG 68, 3 MW IN CAPACITY Aziz, Amiral
Jurnal Rekayasa Lingkungan Vol 7, No 2: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

The importance of exergy analysis in preliminary design of geothermal power has been proven. An exergy analysis was carried out and the locations and quantities of exergy losses, wastes and destructions in the different processes of the plan were pinpointed. The obtained results show that the total exergy available from production wells KMJ 68 was calculated to be 6967.55 kW. The total exergy received from wells which is connected during the analysis and enter into the separator was found to be 6337.91 kW in which 5808.8 kW is contained in the steam phase. The overall exergy efficiency for the power plant is 43.06% and the overall energy efficiency is 13.05 %, in both cases with respect to the exergy from the connected wells. The parts of the system with largest exergy destruction are the condenser, the turbine, and the disposed waste brinekeywords: exergy, irreversibility, geothermal power plant, KMJ 68
STUDI LINGKUNGAN TEMPAT PEMROSESAN AKHIR SAMPAH GALUGA KECAMATAN CIBUNGBULANG KABUPATEN BOGOR PROVINSI JAWA BARAT Suciati, Fuzi; Aviantara, Dwindrata B
Jurnal Rekayasa Lingkungan Vol 12, No 2 (2019): JURNAL REKAYASA LINGKUNGAN
Publisher : BPPT

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Abstract

Tempat pemrosesan akhir (TPA) sampah Galuga merupakan areal controlled landfill untuk sampah domestik penduduk Kota dan Kabupaten Bogor. Areal seluas 54 ha tersebut 92% diperuntukkan bagi sampah domestik Kota Bogor. Sebanyak 500 ton/hari sampah domestik Kota Bogor serta 600 ton/hari sampah domestik Kabupaten Bogor dibuang pada fasilitas penimbusan akhir tersebut. Fasilitas TPA Galuga yang telah beroperasi lebih dari 30 tahun tersebut dilengkapi pula dengan unit proses pengomposan sampah open windrow. Namun laju perolehan produk akhir kompos belum mampu mengimbangi laju penambahan sampah domestik yang masuk ke areal tersebut. Dari sekitar 1100 ton per hari sampah yang masuk ke TPA galuga sekitar 250 ? 300 ton per hari sampah yang berupa plastik maupun kertas dapat disisihkan oleh pemulung. Walaupun TPA Galuga merupakan controlled landfill namun belum terkelola dengan baik. Hal tersebut menimbulkan persoalan lingkungan bau sampah serta mutu lindi yang fluktuatif. Terobosan teknologi tampaknya diperlukan untuk menanggulangi persoalan sampah di TPA Galuga.     kata kunci : sampah domestik, tempat pemrosesan akhir, penimbusan akhir, kualitas lingkungan
POTENSI DAN KENDALA PENGEMBANGAN SAGU SEBAGAI BAHAN PAKAN, PANGAN, ENERGI DAN KELESTARIAN LINGKUNGAN DI INDONESIA Santoso, Arif Dwi
Jurnal Rekayasa Lingkungan Vol 10, No 2 (2017): Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

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
PERFORMANCE TESTS OF COMPOST AND PADDY SOIL MEDIA BED ON GHG (CH4 & CO2) ELIMINATION IN LANDFILL Purwanta, Wahyu
Jurnal Rekayasa Lingkungan Vol 8, No 1: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

One method to reduce emissions of CH4 from municipal solid waste landfill is to modify the final cover layer. Methane (CH4) oxidation by methanotrophs bacteria in the soil cover layer can reduce the concentration of the CH4 emission to the atmosphere. Through field experiments, tested the effect of media bed thickness, moisture and nutrient content in the form of a media bed type that is compost and paddy soil. In general, the efficiency of oxidation by using compost media is higher than the use of paddy soil cover. For both media bed, moisture content 30% more efficient in the oxidation of CH4 compared to 20%. Moisture content determines the rate of gas diffusion between media bed with its gas phase (CH4 and O2). While for a thickness of 25 cm also produced a higher oxidation rate than the 15 cm because of the methanotrophs population.keywords: landfill gas; biofiltration; methane oxydation
UPAYA PENINGKATAN PRODUKTIVITAS LAHAN DENGAN SISTEM BUDIDAYA LORONG DAN PEMBERIAN KAPUR DOLOMIT DI KABUPATEN CIREBON, JAWA BARAT Mulyono, Daru
Jurnal Rekayasa Lingkungan Vol 5, No 1: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

The objective of the research is to know the effect of Alley Cropping to the land fertility, especially with the treatment of organic matter and combination between organic matter and dolomit, with regard to soybean production. The research used Complete Randomized Design with One Way Analysis of Variance, Regression, and Correlation in order to know the effect of treatment to the land fertility. The research was carried out in Cirebon Regency, West Java Province, during three planting seasons from 2007 to 2008. The results of the research showed that Flemengia congesta as a fence crop or hedgerows was signifi cant to land fertility through improvement of nutrients availability, increasing pH, decreasing availability of aluminium (Al). The effect of organic matter from prunning of the hedgerows into the soil to a high of 5,0 ton/ha will increase average soybean production from 13.974 kw/ha (dry grain) to 18.176 kw/ha or increase 30,07 %, whereas the effect of organic matter 5,0 ton/ha combined with dolomit 2,5 ton/ha will increase average soybean production from 13.974 kw/ha to 19.983 kw/ha or increase 43.00 %. The effect of organic matter 10,0 ton/ha combined with dolomit 2,5 ton/ha will increase average soybean production from 13.974 kw/ha to 21.966 kw/ha or increase 57.19 %.
KONSERVASI LAHAN DAN AIR DI HULU DAERAH ALIRAN SUNGAI (DAS) CITARUM MELALUI PENGEMBANGAN BUDIDAYA PERTANIAN SISTEM AGROFORESTRI Mulyono, Daru
Jurnal Rekayasa Lingkungan Vol 6, No 3: Jurnal Rekayasa Lingkungan
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Abstract

The area of Citarum Watershed is cover six regencies: Bandung, Sumedang, Cianjur, Purwakarta, Bogor, and Karawang, West Java. The role and function of upper Citarum Watershed tend to declining, where total of deforestation area reach to a high of 560,095 ha or about 78 % from the total area and part of them already become critical area reach to a high of 143.798 ha. The Debit Ratio of Citarum River or Qmax/Qmin reach to a high of 1,667, it is indicate that Citarum Watershed become very critical condition and need appropriate management especially in the upper watershed. One altervative of the watershed management is application of agricultural forestry system where it is done by integrated development among agriculture, forestry, and animal husbandry. The successful application of agricultural forestry system will lead to conserve land and water where it will support flood control, agricultural irrigation, fisheries development, electric generation, industrial development, etc.Keywords: agricultural forestry, land conservation, watershed
JURNAL REKAYASA LINGKUNGAN LINGKUNGAN, JURNAL REKAYASA
Jurnal Rekayasa Lingkungan Vol 12, No 1 (2019): JURNAL REKAYASA LINGKUNGAN
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Abstract

PERUBAHAN PARAMETER BIOGEOFISIK DAN LINGKUNGAN TPA SAMPAH LEUWIGAJAH PASCA BENCANA LONGSOR Purwanta, Wahyu
Jurnal Rekayasa Lingkungan Vol 4, No 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

This study is conduct to evaluate the changes of biogeophysical aspects of Leuwigajah Dumping Area (TPA) after the slidding event of municipal solid wastes in 2005. It is necessary to reuse the TPA in the future through rehabilitation and revitalitation.The study is important due to the detail engineering design (DED) of new TPA which is still in an on going process, whereas need some consideration from technical and non-technical aspects. The result of geological survey showed that there is no signifi cant changes in geological condition, whether the changes were found in groundwater and surface water quality, before and after the slidding event. At the other side, the result of existing solid waste material showed that a high heavy metals content was found in the bulk material. It isalso found that the quality of degraded material yet is closed to compost, with a C/N ratio between 12,04 to 15,74. This compost-soil is recommended for daily cover soil at the TPA. So, before operating a new TPA, landfi ll mining must be done as initial activity.To reduce or minimize environmental impact the new TPA has to apply sanitary landfi ll method.Key words : biogeophysical, post slidding , Leuwigajah dumping area
PENGGUNAAN AIR SUPER KRITIS PADA DEPOLIMERISASI NYLON-12 (BATCH PROCESS) Yusman, Mohamad
Jurnal Rekayasa Lingkungan Vol 5, No 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Water at the supercritical state is a new process for the chemical recycling. At this thermodynamic state i.e. Pc = 218 atmospheres and Tc = 374oC , water behaves very differently from its everyday temperament and it is a very good solvent for organic components. Experimental studies show that supercritical water can decompose hydrocarbons/polymers and produce useful products like 2-Azacyclotridecanone /lactam-1 from Nylon-12 (batch process). The decomposition process itself was carried out in batch reaction system in order to get more information about product distributions, time dependence, and scale-up possibilities.Keywords: supercritical water, decomposition, batch, polymer, hydrocarbon

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