Jurnal Ilmiah Rekayasa Pertanian dan Biosistem http://jrpb.unram.ac.id/index.php/jrpb <p style="text-align: justify;">Jurnal Ilmiah Rekayasa Pertanian dan Biosistem (e-ISSN: <a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1429152403&amp;1&amp;&amp;">2443-1354</a> and p-ISSN: <a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1340887333&amp;1&amp;&amp;">2301-8119</a>) contain research results related to agricultural engineering and biosystems. The accepted manuscripts are results of research that have not been previously published and are not under consideration for publishing in other publications. All of the authors&nbsp;are expected to have approved the submission of the manuscript to Jurnal Ilmiah Rekayasa Pertanian dan Biosistem and agree with the order of the author's names. The author is responsible for the contents of the text. Correspondence regarding the manuscript will be addressed to the correspondence author.</p> <p>For more information, kindly contact our admin through email: jrpb_pstep@unram.ac.id</p> en-US <p><strong>Copyright Notice</strong></p> <p><a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license"><img src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png" alt="Creative Commons License"></a><br>Jurnal Ilmiah Rekayasa Pertanian dan Biosistem is licensed under a&nbsp;<a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a>.</p> diahajengs@unram.ac.id (Diah Ajeng Setiawati) guyupmdp@unram.ac.id (Guyup Mahardhian Dwi Putra) Mon, 30 Sep 2019 23:39:38 +0800 OJS http://blogs.law.harvard.edu/tech/rss 60 Cover and Table of Contents http://jrpb.unram.ac.id/index.php/jrpb/article/view/153 <p>Sampul depan Jurnal Ilmiah Rekayasa Pertanian dan Biosistem</p> ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/153 Mon, 30 Sep 2019 22:43:16 +0800 Change in The Physical Properties of Tomato Fruit After The Transportation Process http://jrpb.unram.ac.id/index.php/jrpb/article/view/69 <p><em>During the activities of transportation of tomatoes can be damaged due to the vibration frequency of transport machinery and also the transport time. The presence of vibration during the transportation process of tomato fruit can affect change in texture of tomatoes. Optimization is used in this study in order to obtain optimum quality of tomato fruits after simulation transport. Optimization by using Response Surface Methodology (RSM) methods Central Composite Design (CCD) with two independent variables are the vibration frequencies (3 Hz, 6Hz, and 9Hz) and the duration of vibration (90, 120, and 150 minutes) as well as the texture of tomatoes as a response. The optimum conditions obtained in the vibration frequency of 2,32 Hz and transport simulation time 133,42 minutes with optimum texture value of tomatoes is 0,147768 with a value of desirability that 0,928.</em></p> <p><em>&nbsp;</em></p> Ida Ayu Widhiantari, Sandra Sandra, Gunomo Djoyowasito ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/69 Sat, 28 Sep 2019 00:00:00 +0800 Design of Coconut Shell Liquid Smoke Production Machine Based on Cyclone-Redistillation Technology http://jrpb.unram.ac.id/index.php/jrpb/article/view/113 <p><em>The higher of coconut crop production in Indonesia has positively correlated with the amount of coconut shell waste produced which is difficult to decompose by microorganisms. Therefore, the utilization of coconut shell waste into charcoal and liquid smoke has been carried out in recent years. During this time, the conventional process of coconut shell</em><em>-</em><em>liquid smoke (CS-LS) takes 3-5 days and produces grade C liquid smoke in low </em><em>volume</em><em>. Hence, this study aims to </em><em>design </em><em>CS-LS </em><em>production machine </em><em>based on cyclone-</em><em>re</em><em>distillation technology which which can increase the </em><em>volume</em><em> of liquid smoke produced. </em><em>I</em><em>n this study</em><em>, the method</em> <em>used was</em><em> engineering includes structural</em><em> and</em><em> functional design </em><em>also</em> <em>testing performance both apparatus and product</em><em>.</em> <em>The </em><em>performance</em><em> of CS-LS production </em><em>machine was</em><em> analyzed by </em><em>volume</em> <em>for each grades (grade A, B and C).</em> <em>The</em><em> result showed that</em> <em>CS-LS</em><em> production</em><em> machine </em><em>based </em><em>on </em><em>cyclone-</em><em>re</em><em>distillation </em><em>has been production according to specifications, with the total dimension of machine was 132 cm length, 100 cm width and 145 cm height. The</em> <em>volume</em> <em>of grade A CS-LS production was 65 L, whereas the grade B and C volumes was 10 L and 25 L, respectively, with a shorter total production time than conventional methods in SMEs. Therefore, design of CS-LS production machine based on cyclone-redistillation technology</em><em> has great potentially applied in SMEs for producing liquid smoke in Indonesia to increase productivity and quality of </em><em>CS-LS</em><em>.</em></p> Muhammad Fathussalam, Angky Wahyu Putranto, Bambang Dwi Argo, Arta Harianti, Arsyika Oktaviani, Firda Pramesti Puspaningarum, Sellyan Lorenza Olanda Putri ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/113 Sat, 28 Sep 2019 23:54:26 +0800 Determination of Discharge Rating Curve on Rainy Season In Deli Watersheds http://jrpb.unram.ac.id/index.php/jrpb/article/view/117 <p><em>Discharge rating curve is a curve that shows the relationship between water level and river flow so that it can be used to predict the amount of discharge in the river. The purpose of this research was to find the equation of the discharge rating curve in the Deli watershed</em><em>. </em><em>This research was carried out by analyzing river water discharge and taking water level data using a water level logger with a minimum of twice a week. River water discharge</em><em> at the study location has a varied value</em><em> i.e 0,74 – 3,28 m<sup>3</sup></em><em>/</em><em>sec with an average of </em><em>1,06 </em><em>m<sup>3</sup>/sec. </em><em>The determination of the equation of the discharge rating curve uses several methods </em><em>namely linear, polynomial, </em><em>power function</em><em>, logarithmic, and exponential.</em><em> The results of the study show that the equation with the second order polynomial method has the best level of correlation (r) and RMSE with value r</em><em> 0.986 and RMSE 0.01</em><em>1.</em><em> The rating curve equation obtained was Q = 18,97 (h)<sup>2</sup> – 1,372(h) + 0.190.</em></p> Andi Setiawan, Edi Susanto ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/117 Sun, 29 Sep 2019 00:00:00 +0800 Analysis of Type and Length Axis Variations on Plant Growth in Hydroponic Systems http://jrpb.unram.ac.id/index.php/jrpb/article/view/124 <p>This study aims to observe the effect of type and length of axes on the rate of growth and development of mustard (Brassica Juncea L.) plants, analyzing the effect of water circulation on the growth and development of mustard plants. This study used two treatments, namely the type of axis and the length of the axis. Each treatment consisted of 12 repetitions, so there were 24 replications. In this study, we want to examine related parameters, namely air temperature, relative humidity, light intensity, evapotranspiration, and plant growth. The results of the observation showed that the highest light intensity in the T<sub>2 </sub>planting room, the highest evapotranspiration in the T<sub>2</sub>, then plant height were obtained in the T<sub>2</sub> planting area of coconut fiber axis with water circulation system.</p> Ansar Ansar, Guyup Mahardhian Dwi Putra, Opan Sopiandi Ependi ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/124 Sun, 29 Sep 2019 00:00:00 +0800 Physical Properties of Peanuts in Talam 1 Varieties, Talam 2 Varieties and Takar 2 Varieties http://jrpb.unram.ac.id/index.php/jrpb/article/view/127 <p>The physical properties of agricultural products are very important for designing tools and machines for processing products. The quality of peanuts is determined by physical properties. The physical properties that determine the quality of peanuts are the air content and physical quality of seeds (whole seeds, wrinkled seeds, and damaged seeds). The physical properties of peanuts must be considered the size of peanuts (area and volume), true&nbsp;density, bulk density, porosity, angle of friction&nbsp;used for drying and storage. On Measuring the Physical Properties of Peanuts Various Types of Variations Each of which Has Different Values. In the measurement of the average large dimension value of the Talam 2 variety has a number of 14.48 ± 0.97, the average width value required by Takar 2 and Talam 1 varieties is 8.55 ± 0.57 and. Measure 2 has an arithmetic mean diameter value, geometric mean diameter, surface area, and overall volume as a whole - 9.9 ± 0.56, 9.62 ± 0.36, 291.05 ± 22.07, 468 , 03 ± 52.59. This happens because the Takar 2 variety peanut has a larger seed shape and more containing seeds. Glass is a friction surface that has the highest coefficient of static friction.</p> Isnaini Puspitasari, Sandra Sandra, Yusuf Wibisono ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/127 Sun, 29 Sep 2019 00:00:00 +0800 Design and Performance Test of a Bamboo Construction ERK Type Mole Tobacco Dryer http://jrpb.unram.ac.id/index.php/jrpb/article/view/128 <h1><a name="_Toc1978428"></a><em>ABSTRACT</em></h1> <p><em>Tobacco plants are one of the leading commodities of plantations in Sumedang Regency. The processing process in tobacco which influences the quality of tobacco is the drying and condensation process. Currently the drying process of tobacco mole produced in Sukasari District still uses solar energy which is strongly influenced by weather conditions and is very vulnerable to being contaminated by other materials during drying. The drying process using solar energy requires 7-14 days depending on the weather. To speed up the drying process, it is necessary to design a bamboo construction ERK type mole dryer. The purpose of this research is to design and test the performance of ERK type tobacco mole dryer construction, so that it can speed up the drying process of tobacco in large quantities. The research method uses engineering methods through several stages of the activity process, namely: designing ERK type dryers, functional mixtures, structural designs, technical analysis and performance tests. ERK type mole tobacco dryer bamboo construction that has been made has an overall length of 5 m, a width of 3 m and a height of 2.5 m. Construction of dryers using betung and tie bamboo, walls as coatings for dryers using 6% UV plastic. Based on the analysis using Ansys software, it was found that the </em><em>shear stress was still below the recommended threshold of 20.42 Pa, while the threshold of petung bamboo was </em><em>177 MPa. In the no-load test using an exaust fan, the temperature obtained after 24 hours of data collection in the ERK dryer is equal to 14ᵒC - 46ᵒC and while the temperature outside the ERK dryer is 16.4 - 30.5ᵒC. Decrease in the water content of tobacco produced by this dryer is 66% for 5 days, while outside the dryer is 71% for 14 days. Thermal and drying </em><em>efficience this dryer is 17,24% and 55,79%.</em></p> <p><em>&nbsp;</em></p> <p><em>Key word: Design, Performance Test, ERK Dryer, Tobacco Mole</em><em>, Bamboo</em></p> Wahyu Kristian Sugandi, Ahmad Thoriq, Asep Yusuf, Arif Purwonugroho ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/128 Mon, 30 Sep 2019 00:00:00 +0800 Analysis of Physical Properties and Nutritional Contents of Milk Cream using Centrifugation Technology http://jrpb.unram.ac.id/index.php/jrpb/article/view/130 <p><em>Milk contains complete nutritional components such as fat, protein, calcium, vitamins and other minerals. To produce skim milk and cream, centrifugation technology is needed. Centrifugation is a method that uses the principle of sedimentation, where centripetal acceleration is used to separate substances that have different densities. By centrifugation it is possible to break down the emulsion and separate the dispersion of fine liquid droplets, although in this case the suspended phase is in the form of liquid droplets which will coalesce after separation. The purpose of this study were to analyze the effect of temperature and rotational speed of centrifugation on the physical properties and nutritional content of milk cream. This study uses two parameters, namely centrifugation speed and temperature. The variation in temperature used are 30, 40 and 50 ° C and the centrifugation speed are 6000.G, 7000.G and 8000.G. The results showed that centrifugation using the conical disc centrifuge was able to separate fat from fresh milk. The highest fat content is 20.42% and the highest protein is 1.577% at 6000.G centrifugation speed. Increasing temperature and rotation speed will increase yield, density, water content and conductivity of milk cream. On the other hand, it can shorten the processing time, reduce the viscosity and boiling point of milk cream.</em></p> <p><em>&nbsp;</em></p> <p><em>&nbsp;</em></p> La Choviya Hawa, Anang Lastriyanto, Anggi Akhmad Ervantri ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/130 Mon, 30 Sep 2019 21:56:17 +0800 The Study of Process and Characteristics of Woven Fabric from Plant Fibers of Lidah Mertua (Sansevieria trifasciata P.) http://jrpb.unram.ac.id/index.php/jrpb/article/view/137 <p><em>Sansevieria or known as tongue-in-law plant is an ornamental plant that is quite popular in Indonesia. This plant is very easily cultivated, easy to grow in areas with </em><em>less water and sunlight</em><em>. </em><em>This plant contains potential natural fibers used as raw material requirements for textile industry</em><em>, specifically in fabric making. </em><em>The aims of this research were to determine</em><em> the production process consisting and analyzing the characteristics of woven fabrics from the leaves of the tongue-in-law plant. </em><em>The method of fibers extraction used the</em><em> mechanical decortication process </em><em>and making woven fabric is done using ATBM. </em><em>The research method used is descriptive method</em><em>. </em><em>Based on the results of the study, it is known that the woven cloth of tongue-in-law has color characteristics with a value of L* 69.73; a* 1.86; b* 17,38; H 83,88. Besides that, it is known the mechanical characteristics of the tongue-in-law woven fabric, the tensile strength of the fabric, the weft&nbsp; direction of 46.05 kg and the warp direction of 19.96 kg; weft direction stretch 22% and </em>stretch direction of the warp of <em>55.20%; weft direction tear strength 19.17% and wrap direction 4.60%; and air penetrating power 116.2 cm<sup>3</sup>/cm<sup>2</sup>/s.The value of the tensile strength of the tongue-in-law woven fabric produced in the warp direction does not meet the standards of SNI 08-0056-2006 woven fabric quality requirements for suit.Therefore, woven fabric produced is intended as a craft material.</em></p> Lisa Oktavia Br Napitupulu, Asri Widyasanti, Ahmad Thoriq, Asep Yusuf ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/137 Sun, 29 Sep 2019 00:00:00 +0800 Performance of Proximate Analysis of Moringa (Moringa oleifera Lam) Seeds on Various Seed Drying Techniques http://jrpb.unram.ac.id/index.php/jrpb/article/view/138 <p>One of the advantages of <em>Moringa</em> is the proximate component of seeds, which can be seen as a source of further planting material and also as an industrial processed base material, whose quality is largely determined by how to process the seeds. This study aims to determine the performance of the proximate component of <em>Moringa</em> seeds in various ways of drying seeds. The drying technique are drying using an oven at 60 ± 3 <sup>O</sup>C and at 105 ± 3 <sup>O</sup>C, drying with sunlight, and drying with wind flow (dry wind). 250 g of seed samples were used in each drying technique with three replications. Proximate analysis of <em>Moringa</em> seeds was carried out using the standard method by AOAC (2000). The results showed that the drying technique had a significant effect on the proximate component of <em>Moringa</em> seeds due to differences in drying temperatures. There was a decrease in the fat and protein content of the seeds as drying temperatures increased, especially in oven drying techniques (60 <sup>O</sup>C and 100 <sup>O</sup>C). Wind drying techniques and sun drying were better techniques for drying <em>Moringa</em> seeds</p> Bambang Budi Santoso, IGM Arya Parwata, Jayaputra Jayaputra ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/138 Sun, 29 Sep 2019 00:00:00 +0800 Prediction of Rice Harvest using Unmanned Aircraft http://jrpb.unram.ac.id/index.php/jrpb/article/view/139 <p><em><span style="font-weight: 400;">Prediction of agricultural products is needed in terms of planning and decision making as well as in policy making for national food security. One strategic commodity that needs special attention is rice. This study aims to predict rice yields using unmanned aircraft. The results of image acquisition are processed by multi thresholding method to separate leaf objects, rice panicles, and background. Furthermore, the results of sorting objects are used as input in making predictions of rice crop models using artificial neural networks. To compare the results of predictions, we weighed the weight of rice harvest on each block. The results showed that between predictions and actual correlations were very strong with R</span></em><em><span style="font-weight: 400;">2</span></em><em><span style="font-weight: 400;"> = 0.88, MSE (Mean Square Error) = 0.169 and MAPE (Mean Absolute Percentage Error) values ​​were -0.006. These results indicate that the prediction model of rice yields can be used for estimation purposes.</span></em></p> Abdul Holik, Riza Rahimi Bachtiar ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/139 Sun, 29 Sep 2019 00:00:00 +0800 Effects of Solvent Volume Ratio on Patchouli-Alcohol Crystallization in Patchouli Oil (Pogostemon cablin Benth) with Cooling Crystallization Method http://jrpb.unram.ac.id/index.php/jrpb/article/view/142 <p>Minyak nilam merupakan salah satu komoditas minyak atsiri andalan Indonesia yang sangat prospektif di pasaran. Untuk meningkatkan mutu minyak nilam yaitu dengan menghasilkan kandungan <em>patchouli alcohol</em> yang tinggi. Pada proses kristalisasi <em>patchouli alcohol</em> perlu dilakukan optimalisasi untuk mendapatkan rendemen dan mutu <em>patchouli alcohol</em> yaitu dengan menggunakan pelarut. Penelitian ini bertujuan untuk mengetahui pengaruh perbandingan pelarut dalam proses kristalisasi <em>patchouli alcohol</em> terhadap rendemen dan mutu kristal yang dihasilkan. Metode penelitian yang digunakan adalah metode deskriptif dengan analisis korelasi-regresi. Penelitian ini diawali dengan proses distilasi fraksinasi vakum minyak nilam untuk meningkatkan kadar <em>patchouli alcohol</em> dalam distilat. Pada proses kristalisasi digunakan lima kondisi variabel pelarut yaitu 10%, 20%, 30%, 40%, dan 50% dan satu perlakuan kontrol. Pengamatan yang dilakukan yaitu rendemen dan mutu kristal <em>patchouli alcohol</em> meliputi uji warna, <em>bulk density</em> dan <em>partikel density</em>, dan <em>melting point</em>. Nilai rendemen kristal dan <em>yield</em> terbesar pada perlakuan volume pelarut 10% yaitu 52,77% dan 87,93%. Perolehan mutu yang terbaik yaitu uji warna pada perlakuan volume pelarut 50% sebesar 100,0533, <em>bulk density </em>pada perlakuan volume pelarut 10% sebesar 0,4351 g/mL,<em> true density </em>pada perlakuan 30% sebesar 1,0011 g/mL, <em>melting point</em> pada perlakuan 40% sebesar 57℃.</p> Laily Rizki Safira, Asri Widyasanti, Sarifah Nurjanah ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/142 Mon, 30 Sep 2019 22:05:57 +0800 Design of Semi –Mechanical Tobacco Slicer Machine with Paddle Type http://jrpb.unram.ac.id/index.php/jrpb/article/view/144 <p>&nbsp;<em>Tobacco is a very promising export commodity for Indonesia. With a high selling price, tobacco can improve the economic level of the tobacco farming community. Problems that are often faced in the tobacco processing process are long and less efficient crafting processes. Therefore we need a tool to support an effective and efficient crafting process. The making of tools is done in Malang creative art welding workshop and tool testing is carried out in the power laboratory and agricultural machinery. The purpose of making this tool is to make the semi-mechanical tobacco chopper system paddle and test the performance of the chopper machine. The working principle of this machine is that the blade shaft that is connected to the pedaling pedal will rotate when the pedal is moved and will slice the leaves of tobacco that enter through the leaf input section. From the results of engine performance tests that have been made obtained the value of engine efficiency is 94% and the average capacity of 21.92 kg / hour and the power needed by the engine is 0.228 HP</em></p> Sandra Sandra, Yoga Aditya Pratama, Gunomo Djoyowasito, Ary Mustofa Ahmad ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/144 Mon, 30 Sep 2019 22:07:44 +0800 Effect of DC Voltage on Tomato Paste Dewatering using Electroosmosis Dewatering Method http://jrpb.unram.ac.id/index.php/jrpb/article/view/145 <p><em>Tomatoes are fruits that contain a number of important nutrients, such as carbohydrates, vitamin C, vitamin A, vitamin B1, vitamin B2, lycopene, iron, fiber, minerals, and so on. However, tomatoes include climatic fruit, which will rot if not consumed immediately. Under these conditions it’s necessary to process tomatoes into potential products such as tomato paste. Tomato paste production is done by the evaporation process to remove some of the water content. But giving heat to evaporation can damage the nutritional content of the paste. Electroosmosis dewatering is method for reducing water content by placing colloidal suspensions between two electrodes. This method is an interesting to concentrate the suspension that is sensitive to heat. Based on this, research is needed to determine the effect of electroosmosis on reducing water content in tomato paste. In this study, the DC voltage variations used were 0 V, 4.5 V, 9 V, 18 V and 36 V with 100 minutes processing time. The parameters measured based on these variations are changes in DC current during the EOD process and water content of tomato paste. The results showed that DC electric current decreases with increasing processing time, and increases with increasing voltage. the electric current at the lowest voltage variation (4.5 VDC) is 41.40 mA - 59.7 mA, while the electric current at the highest voltage variation (36 VDC) reaches 231.86 mA - 776.67 mA. The increasing DC voltage, the tomato paste water content decreases, so the best stress for the dewatering process is 36 V.</em></p> <p>&nbsp;</p> Joko Prasetyo, Kamsiatun Eka Pratama, Anang Lastriyanto ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/145 Mon, 30 Sep 2019 22:17:20 +0800 Design of Hanjeli Grinding Machines http://jrpb.unram.ac.id/index.php/jrpb/article/view/146 <p><em>Food needs will continuous to increase along with population growth rate continuous to rise, so is needed the alternative foodstuff to be developed, one of is job’s tears. Before job’s tears is processed there are many process are shelling, polishing of aleuron layer, separating of job’s tears from bran, and milling.Job’s tears utilization as food as still constrained in shelling the outer leather because the leather is very hard, so is neededthe design of job’s tears shelling machine for easy in shelling before polishing. The research was conducted in </em><em>July - November</em><em> 201</em><em>8</em><em> on Repair Laboratory Metal Wood and Rattan, Faculty of</em><em>Agro-Industrial Technology</em><em>, Padjadjaran University.Research use engineering methode by doing an design activity. The result </em><em>is </em><em>a job’s tears </em><em>post-harvest machine including sheller unit, separator unit, and polisher unit </em><em>with the main components are framework, transmission system, hopper, sheller cylinder and output. This machine can use for shelling of stones job’s tears with none shelled job’s tears &lt;35%.</em></p> Asep Yusuf, Ahmad Thoriq, Zaida Zaida, Asri Widyasanti, Ganjar Dianugraha Alam ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/146 Sun, 29 Sep 2019 00:00:00 +0800 Lignin, Hemiselulosa, and Cellulose Contents of Zalacca Midrib in Physical, Chemical, and Biological Pretreatment http://jrpb.unram.ac.id/index.php/jrpb/article/view/148 <p>This research aimed to determine the content of lignin, hemicellulosa and salacca midrib cellulosa and physical chemical and biological pretreatment, to determine degradation of lignin, hemicellulose and cellulose. Physical treatment used the steam explosion, chemical treatment used the NaOH and biological treatment used the <em>Trichoderma reesei</em> FNCC 6012. Pretreatment using the steam explosion based on temperature consisting 120<sup>0</sup>C, 140<sup>0</sup>C, and 160<sup>0</sup>C. Pretreatment using NaOH based on concentration consisting 2%, 4%, and 6%. While the pretreatment using <em>Trichoderma reesei</em> based on fermentation time consisting 5 days, 10 days, 15 days. The pretreatment reduced the lignin content on salacca midrib. The parameters observed lignin, hemicellulose and cellulose content. The results showed that pretreatment using Steam Explosion with a temperature of 140<sup>0</sup>C and 160<sup>0</sup>C reduced lignin levels by 16.03% and 15.90%. Pretreatment using Steam exploision temperature 160<sup>0</sup>C and <em>Trichoderma reesei</em> 15 days increased hemicellulose content by 35.84% and 36.21%. Pretreatment using Steam Explosion at 160<sup>0</sup>C had the best effect on cellulose at 51.09%.</p> <p>&nbsp;</p> Devi Devi, Dwi Astutik, Muhammad Nur Cahyanto, Titiek F Djaafar ##submission.copyrightStatement## http://jrpb.unram.ac.id/index.php/jrpb/article/view/148 Sun, 29 Sep 2019 00:00:00 +0800