Setyo S. Moersidik
Civil Engineering Department, Faculty of Engineering, University of Indonesia

Published : 8 Documents
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Sorption Analysis of 137Cs On Karawang’s Clay Samples Setiawan, Budi; Prihastuti, Suci; Moersidik, Setyo S.
Aceh International Journal of Science and Technology Vol 5, No 3 (2016): December 2016
Publisher : Graduate School of Syiah Kuala University

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Abstract

The objective of this work is to characterize the specific of distribution coefficient (Kd) values of 137Cs onto Karawang’s clay for radioactive waste disposal facility purpose. Sorption phenomena was affected by contact time, ionic strength and loaded concentration of CsCl.  Experiments were done in a batch method, with initial concentration was 10-8 M CsCl in the experiments of contact time and ionic strength effects. In the CsCl loading experiment, the concentration was varied from 10-8 to 10-4 M CsCl and 137Cs radioactive solution was used as a tracer. The solid-liquid ratio is 10-2 g/mL.  The results shown that obtained Kd values were 21,714 and 4035 mL/g after contacted for 8 days for Sample-1 and 2, respectively. The presence of K+ and Na+ ions in solution had reduced the Kd value Cs-137 where the effect of K+ is greater than Na+ on decreased the value of Kd.  The increasing of CsCl concentrations in solution had reduced the value of Kd.  In both samples of clay were closely fit to Freundlich isotherm and pseudo-second order kinetic model.  The results are very useful as the input of the safety assessment activity of site candidate for radioactive waste disposal facility in the future.
Pengaruh Limbah Organik dan Rasio N/P Terhadap Kelimpahan Fitoplankton di Kawasan Budidaya Kerang Hijau Cilincing Makmur, Murdahayu; Kusnoputranto, Haryoto; Moersidik, Setyo S.; Wisnubroto, Djarot S.
Jurnal Teknologi Pengelolaan Limbah Vol 15, No 2 (2012): Desember 2012
Publisher : BATAN

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Pengayaan bahan pencemar organik di perairan dipertimbangkan sebagai salah satu faktor pemicu pertumbuhan fitoplankton, dimana input bahan organik dari aktifitas antropogenik di daratan akan memicu ledakan alga. Penelitian ini akan melihat pengaruh limbah organik yang masuk ke perairan Cilincing melalui Sungai Cakung terhadap kelimpahan fitoplankton, dan mencari hubungan antara rasio N/P terhadap dominasi fitoplankton spesies tertentu. Analisis deskriptif dan korelatif dilakukan terhadap data series selama 5 tahun (2006–2010) pada Sungai Cakung, Muara Cilincing dan di perairan Cilincing, yang kemudian dibandingkan dengan data pemantauan langsung pada Januari-Pebruari 2011. Hasil analisis memperlihatkan bahwa pencemar organik di Sungai Cakung sudah melewati baku mutu, terutama untuk parameter oksigen terlarut (Dissolved Oxygen, DO), kebutuhan oksigen biokimia (Biochemical Oxygen Demand, BOD) dan amonia. Di perairan Cilincing, parameter temperatur, pH dan salinitas masih dalam kisaran baku mutu yang ditetapkan untuk perairan budidaya. Kandungan organik bervariasi di bawah dan di atas baku mutu dengan kelimpahan fitoplankton yang tinggi, termasuk kategori blooming. Tidak ada korelasi antara perubahan temperatur, pH dan salinitas terhadap kelimpahan fitoplakton, hal ini menunjukkan bahwa ketiga parameter tersebut bukan faktor utama dalam pertumbuhan fitoplankton. Rasio N/P berkisar dari 2–12,5/1, dengan rasio terbesar pada bulan Mei 2010, tetapi tidak ada data kelimpahan fitoplankton. Kelimpahan fitoplankton pada umumnya didominasi oleh diatom, dimana kelimpahan dinoflagelata berkisar dari 0,04-8,53% selama 5 tahun terakhir ini. Jika nilai rasio N/P turun, akan menyebabkan suksesi dari diatom ke dinoflagelata. Perlunya penguatan regulasi yang mengatur buangan pencemar organik yang masuk ke perairan, dan kegiatan monitoring lingkungan perairan sebagai tindakan pencegahan ledakan alga. Kata kunci: pencemar organik, kelimpahan fitoplankton, rasio N/P, Cilincing
KARAKTERISTIK DAN POTENSI BIOETANOL DARI NIRA NIPAH (Nypa fruticans) UNTUK PENERAPAN SKALA TEKNOLOGI TEPAT GUNA Hadi, Sopyan; Moersidik, Setyo S.; Bahry, Syaiful
Jurnal Ilmu Lingkungan Vol 7, No 2 (2013)
Publisher : Jurnal Ilmu Lingkungan

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Implemetasi underdeveloped research for large-scale production of energy self-sufficient villages and confined in a laboratory scale. The presence of mangrove forests alongthe palm beach peissir Indonesia is a potential independent village granaries Energy (DME)to produce local non-fossil energy resources, namely bioethanol as an energy mix throughthe substitution of fossil fuels in order to add and save energy nationwide. Exploration ofgreen energy production process Tempatan with scale appropriate technology is essential toknow the characteristics and potential of bioethanol and fuel substitution products will beproduced. The purpose of this study was to determine the characteristics of bioethanol frompalm sap processing to scale the application of appropriate technology and the potentialvalue of bioethanol FGE levels that would result in a 1 ha of mangrove forests nypa.Research using experimental and observational methodologies. Palm sap is used as thesubject of this study is the result of tapping mangrove palm bunches done processingfermentation, distillation and dehydration. Data collected includes data 1). Characteristic,among others: fermentation, Kadar Alcohol Distillation and Dehydration results TTG Tools,Redemen Bioethanol, Nipah Bioethanol Quality Testing Specifications for Substitute GradeFuel, Bioethanol Blending Testing FGE The substitution process to Fossil Fuels andCounting Bioethanol substitution needs to Biopremium octane FGE 92-95. And data 2). Thepotential value of Bioethanol and Biopremium Nipah. Furthermore, the data obtained andanalyzed, if there is a significant difference followed by Duncan test at 5% significance level.The results showed the characteristics of bioethanol from palm sap processing to scale the application of appropriate technology for fermentation derived average fermentation time isbetween 75.3 to 78 hours, or about 3 days, the average alcohol content of 81.3% obtained bydistillation and 93% as much as 2 times the process and result of dehydration reached 100%for the first time, redemen bioethanol by 8.1%, or a ratio of 12 Litre fermenting juice: 1 Literbioethanol FGE, quality testing specifications nypa fuel grade ethanol to substitute ethanolcontent nypa production equipment amounted to 99.56% TTG already qualified ISOstandards, testing FGE in the bioethanol blending into fossil fuel substitution showed ahomogeneous mixing and calculating FGE bioethanol substitution needs to biopremium 92octane produces a ratio of 1% use 95-octane bioethanol to produce ratio of 2% use ofbioethanol. Furthermore, the potential for the production of bioethanol from palm mangroveforest area of 1 ha with the highest value of 13179.43 liters / ha / year and the lowest value of2744.17 liters / ha / year. Biopremium production potential for the substitution of 10%obtained the highest value and the lowest value of 137,298.50 658,971,50 Liter.Keywords: bioethanol, nira nipah, technology
PENGOLAHAN AIR LIMBAH DOMESTIK DENGAN ANOKSIK-AEROBIK MOVING BED BIOFILM REACTOR (STUDI KASUS: PENYISIHAN AMONIA DAN KARBON DALAM AIR LIMBAH DOMESTIK) Ningtias, Berliana C.; Moersidik, Setyo S.; Priadi, Cindy R.; Said, Nusa Idaman
Jurnal Air Indonesia Vol 8, No 2 (2015): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

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Abstract

Domestic wastewater contains high organic carbon and ammonium concentration which can be treated by moving bed biofilm process. It is a biologycal hybrid between attached and suspended growth process. The purposes of this research were to determine the removal percentage of organic carbon and ammonium concentration in domestic wastewater, and to investigate optimum hydraulic residence time. Experiment was carried out in a laboratory scale to study the combine anoxic and an aerobic reactor condition. The treatment process is preceeded by a 4-week seeding process continued with variation of hydraulic residence time. Based on these results, the removal percentage of COD for each hydraulic residence time of 12, 16, and 20 hours were 75,7%; 83,7%; and 91,0%, the removal percentage of ammonium were 79,4%; 91,0%; and 92,3%. The optimum hydraulic residence time in removing organic carbon and ammonium concentration domestic wastewater using anoxic aerobic MBB is 20 hours. This biological hybrid treatment can be an alternative to remove organic carbon and ammonium in domestic wastewater. Keyword: domestic wastewater, ammonium removal, organic carbon removal, moving bed biofilm reactor
DEGRADASI LINGKUNGAN DI KAWASAN PENYANGGA SUAKA MARGASATWA BUKIT RIMBANG BUKIT BALING PROPINSI RIAU Moersidik, Setyo S.
Jurnal Ilmu Lingkungan Vol 8, No 2 (2014)
Publisher : Jurnal Ilmu Lingkungan

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The environmental conditions of Wildlife Sanctuary buffer zones Bukit Rimbang BukitBaling (SM BRBB) alleged to have been degraded by a variety of community activities.This research aims to determine the condition and degradation of SM BRBB bufferzone. The survey was conducted in the buffer zone of SM BRBB, especially located inthe district of Kuantan Singingi, Riau Province. The forest area in the buffer zone of SMBRBB is located in hilly areas, composed by primary forest and secondary forest. In2004 the forest buffer zones is amounted to 14539.98 ha, and shrinkage to 82.25% in2008. The major threats of SM BRBB buffer zone comes from illegal logging,Industrial Plantation Forest (IPF), farms and settlements. In the period of 2004-2008,there has been a vast increase of IPF amounted to 195.76% of the initial area amountedto 8198.39 ha, plantation area of 159.74% of the initial area 2300.89 ha, and theaddition of extensive settlement of 222.56% of the initial area of 29.97 ha.Keywords: Riau, Bukit Rimbang Bukit Baling, Buffer Zone, Degradation.
Study on Heat Island Effect Induced by Land Use Change Increased Temperature in Metropolitan Jakarta Lestari, Sopia; Moersidik, Setyo S.; Syamsudin, Fadli
Journal of Mathematical and Fundamental Sciences Vol 47, No 2 (2015)
Publisher : ITB Journal Publisher, LPPM ITB

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The heat island (HI) effect in metropolitan Jakarta was studied using air temperature measurements at 9 meteorological stations in Jakarta, Tanjung Priok, Serang, Halim, Cengkareng, Pondok Betung, Curug, Bogor, Citeko during 1986-2008 and Serpong during 2008-2011 and 2013; land use for forest, industry, water, settlement, open/cleared land in 1997, 2004, 2009, 2012; and total number of industries and total number of vehicles during 1986-2011. Harmonic analysis was used to remove the seasonal component from the temperature time series data, which was filtered with the 30-day moving average technique to capture trends whose significance was tested with the Mann-Kendall method. The results show that industry was a major factor in land use change over Jakarta with an increasing growth/year of 502 ha (9.76%) concentrated in the eastern part of Jakarta from 1997 to 2012. Industry had a spatial cover change similar to deforestation and open/cleared land expansion, especially in Jakarta from 2009 to 2012: 38.8%/year (industry), 8.3%/year(deforestation), and 13.8%/year (open/cleared land). The HI effect increased the temperature trend rate/year in Jakarta, Tanjung Priok, Serang, Halim, Pondok Betung, Cengkareng, Curug, and Bogor about 0.051°C, 0.021°C, 0.018°C, 0.012°C, 0.006°C, 0.006°C, 0.005°C, and 0.004°C from 1986 to 2008, respectively, equivalent to average warming in the city, suburban, and mountainous areas of around 2.5°C, 0.6°C, and 0.4°C, respectively within 100 years from 2009.
KAJIAN KARAKTERISTIK MUARA CILIWUNG DENGAN MODEL BUDGET NITROGEN Suryono, Devi Dwiyanti; Moersidik, Setyo S.
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 22, No 1 (2015)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Perairan muara merupakan perairan yang mempunyai karakteristik yang khas karena dipengaruhi oleh faktor hidrodinamika dan pola musim, yaitu musim timur dan musim barat. Tujuan penelitian ini adalah untuk mengaplikasikan metode perhitungan biogeokimia berdasarkan pendekatan LOICZ pada perairan muara Ciliwung dan memperoleh informasi tentang karakteristik nitrogen pada perairan muara Ciliwung. Berdasarkan hasil analisis diketahui bahwa pada musim timur dan musim barat perairan muara Ciliwung berperan sebagai nitrogen. Pada musim timur perairan muara Ciliwung bersifat autotrofik, sedangkan pada musim barat perairan tersebut bersifat heterotrofik. Hal ini dicirikan melalui siklus nitrogen dengan laju fiksasi lebih besar daripada laju respirasi pada musim timur, sedangkan pada musim barat yang terjadi adalah sebaliknya, laju respirasi lebih besar dibandingkan dengan laju fiksasinya, sebesar 21,14 mg/hari. Normal 0 false false false EN-US X-NONE X-NONE   
POTENSI DAN OPTIMALISASI PRODUKTIVITAS NIRA NIPAH (Nypa fruticans) DARI METODA PENYADAPAN TRADISONAL KE TEKNOLOGI NON KONVENSIONAL Hadi, Sopyan; Thamrin, Thamrin; Moersidik, Setyo S.; Bahry, Syaiful
Bumi Lestari Vol 14, No 2 (2014)
Publisher : Udayana University

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Abstract

The utilization of non-timber forest products of mangrove palm (Nypa fruticans Wurmb) ofsap produced through the process of tapping,  is still made   by the traditional way with theamount of sap production is still small or limited for consumption purposes. Sap whichcontains sugar has a potency to be fermented  into ethanol which is a source of greenenergy. The problem is the amount of available sap as raw material obtained by traditionaltapping is still limited, therefore, more efforts to increase productivity are needed. Thepurpose of this study was to explore several methods of tapping palm from traditional waytowards  non-conventional technologies. This study used an experimental method examiningseveral factors including 1) Duration of pre-tap (10 days, 20 days, 30 days) 2). Pre-tappingstimulation (without and with stimulation) 3) Type of container (non-vacuum container(traditional), 1.5 L small vacuum container, 2L medium vacuum container  and 20L largevacuum containers). 4) The level of luxuriance palm leaf midrib (not dense 0-2 midrib, lessdense 3-4 midrib and dense > 4 midrib). Observed variables are sap volumes include volumesof palm sap/stem, sugar, tapping duration/stem. The result obtained from tapping processon mangrove forest in Lubuk Muda Village, Siak Kecil District, Bengkalis Regency RiauProvince showed that optimal productivity were obtained on 1). Pre-tapping stimulationat 30 days. 2) Treatment with pre-tapping stimulation. 3) Harvesting on the medium vacuumcontainer and 4) found in dense leaf midrib.