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All Journal MEDIA PETERNAKAN - Journal of Animal Science and Technology Matematika: Jurnal Teori dan Terapan JURNAL PETERNAKAN Jurnal Sains dan Teknologi Reaksi
R Ridwan
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology Mathematics

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Pengaruh Penambahan Dedak Padi dan Lactobacillus plantarum 1BL-2 dalam Pembuatan Silase Rumput Gajah (Pennisetum purpureum) R Ridwan; S Ratnakomala; G Kartina; Y Widyastuti
Media Peternakan Vol. 28 No. 3 (2005): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.908 KB)

Abstract

Silages making is a solution to overcome the shortage or excessive of forages in Indonesia. The objective of this study was to evaluate the effect of rice bran as carbohydrate source and Lactobacillus plantarum 1BL-2 addition on the quality of napier grass (Pennisetum purpureum) silages. The concentrations of rice bran and Lactobacillus plantarum 1BL-2 added were 0%,1%, 3% and 5 % (w/w) and incubated for 30 days. The results showed that the addition of 1%-5% rice bran significantly affected (P
Quality of Vegetable Waste Silages Treated with Various Carbohydrate Sources W D Astuti; Y Widyastuti; R Ridwan; E Yetti
Media Peternakan Vol. 36 No. 2 (2013): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1947.185 KB) | DOI: 10.5398/medpet.2013.36.2.120

Abstract

The aim of this research was to evaluate the quality of vegetable waste silages, using rice bran, onggok (cassava flour waste) and pollard as carbohydrate sources. Vegetable waste was collected from local traditional market, consisted of corn husk, chinese cabbage and cabbage. Research was held in randomized block design consisted of six treatments with 3 replications. Treatments were (T1) vegetable waste + rice bran, (T2) vegetable waste + rice bran + rice straw, (T3) vegetable waste + onggok, (T4) vegetable waste + onggok + rice straw, (T5) vegetable waste + pollard, (T6) vegetable waste + pollard + rice straw. Lactobacillus plantarum 1A-2 was used as innoculant. The quality of silages was evaluated by measuring pH, temperature, population of lactic acid bacteria and lactic acid production. Nutrient characteristic was determined by proximate and fiber analysis. Results showed that pH of silages were not affected by treatments, but silage treated with rice bran, with or without rice straw addition, had higher temperature compared with others (29 oC or 28.3 oC). The highest population of lactic acid bacteria (1.65 x 109 cfu/g) was found in silage using rice straw and onggok (T4), but the highest lactic acid production (0.41%) was measured in silage using rice straw and rice bran (T2). In general, the use of rice bran as carbohydrate sources gave the highest lactic acid production followed by pollard and onggok. Different carbohydrate source gave different nutrients characteristic. Although the result was not significantly different, silage with highest protein content was measured in silage with pollard as carbohydrate source, followed with rice bran and onggok. The result showed that all carbohydrate sources used in this experiment can be used as silage ingredient resulting in good vegetable waste silage.
Rumen Fermentation and Milk Quality of Dairy Cows Fed Complete Feed Silages K Komalasari; D A Astuti; Y Widyastuti; R Ridwan
Media Peternakan Vol. 37 No. 1 (2014): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (311.124 KB) | DOI: 10.5398/medpet.2014.37.1.38

Abstract

This study was conducted to evaluate the rumen fermentation and milk quality of Friesian Holstein (FH) cows given complete feed silages during lactation. Twelve FH cows in 5th mo lactation were offered four dietary treatments in a completely randomized design with three replications. The treatments were, control diet (NS) containing 50% concentrate, 45% elephant grass and 5% sun flower meal; grass complete feed silage (GS) containing 50% concentrate, 45% elephant grass and 5% sunflower meal; rice straw complete feed silage (RSS) containing 50% concentrate, 30% elephant grass, 15% rice straw and 5% sunflower and palm oil frond complete feed silage (PKS) containing 50% concentrate, 30% elephant grass, 15% palm oil frond, and 5% sunflower meal. Ensilage was done with addition of Lactobacillus plantarum 1A-2 and cellulase enzyme. Analysis of variance and Duncan test were applied to compare the different among the means of treatments. Complete feed silages had range of pH between 3.89-4.44, temperature of 28.0-29.67 oC and lactic acid bacteria of 0.54-1.50 x 108 cfu/g. Crude protein intake of  RSS was  the highest among treatments. Acetate concentration in rumen liquor was more than 70%. Milk yield and protein were not different among treatments. GS gave the highest milk fat (5.66%). The conclusion was that both complete feed silages, using rice straw or palm oil frond can be used as alternative rations for lactating dairy cows. Key words: complete feed, silage, Friesian Holstein, palm oil frond, rice straw
KUALITAS FISIK SILASE AMPAS KECAP DENGAN ADITIF TANIN AKASIA (Acacia mangium Wild.) DAN ADITIF LAINNYA Sadarman Sadarman; M Ridla; Nahrowi Nahrowi; R Ridwan; R P Harahap; R A Nurfitriani; A Jayanegara
Jurnal Peternakan Vol 16, No 2 (2019): September 2019
Publisher : State Islamic University of Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jupet.v16i2.7418

Abstract

Tannin is one of plant secondary metabolites that could protect proteins from various microbes, both in feed material and in rumen. Tannin can be used as an additive in the silage production process, especially high-protein feed material. The study aimed to evaluate the physical quality of soy sauce by-product silage treated with Acacia mangium Wild. tannin (AT; condensed tannin). This study used the fresh soy sauce by-product, tannin of acacia and chestnut (CT; hydrolysable tannin), BAL and propionate acid (PA). Soy sauce by-product was fermented in silo with a capacity of 1.3 Kg. This experiment was arranged in a complete randomized design with 6 treatments and 3 replications. The treatments were (R1) fermented soy sauce by-product, (R2) R1 + BAL, (R3) R1 + 2% AT, (R4) R1 + 2% CT, (R5) R1 + 0.5% PA and (R6) R1 + combination of 1% AT, 1% CT and 0.5% PA. The observed variables were the loss of dry matter (%), temperature (⁰C), smell, color and emerged fungus on silage. Analysis of variance was performed by SPSS version 23. For any significant difference between treatments was evaluated by DMRT at level of confident 5%. The result showed that AT suppressed the loss of dry matter up to 0.91%, and produced no smell with black color such as soybean color. The silage temperature was relatively similar for about 28.9-29.4 ⁰C, no emerged fungus, and did not able to maintain the normal silage temperature. Nevertheless, the use of acacia tannin could produce a good quality soy sauce by-product silage.
Efektifitas Load Balancing Dalam Mengatasi Kemacetan Lalu Lintas Erwin Harahap; Andri Suryadi; R Ridwan; Deni Darmawan; Rakhmat Ceha
Matematika Vol 16, No 2 (2017): Jurnal Matematika
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jmtm.v16i2.3665

Abstract

Abstrak. Kemacetan jalan raya merupakan permasalahan umum di setiap kota yang memerlukan penanganan serius. Pemecahan permasalahan kemacetan jalan raya tidak hanya dapat diselesaikan dengan hanya meningkatkan kualitas dan kuantitas infrastruktur, namun juga manajemen lalu lintas. Pada artikel diusulkan suatu metode untuk mengurangi kemacetan lalu lintas, yaitu dengan menyeimbangkan beban ke berbagai ruas jalan yang disebut dengan load balancing. Melalui metode ini diharapkan beban lalu lintas terbagi secara merata ke berbagai jalur alternatif sedemikian sehingga antrian panjang kendaraan dapat dihindari. Evaluasi efektifitas dari metode load balancing ini dilakukan melalui simulasi dengan mengimplementasikan salah satu bidang ilmu Matematika, yaitu teori Antrian. Simulasi dibuat dengan menggunakan toolbox SimEvents yang dijalankan pada software MATLAB.Kata Kunci: load balancing, kemacetan, lalu lintas, sim-events, matlabAbstract. (the effectiveness of load balancing in reducing the road traffic congestion) Road congestion is a common problem in any city that needs serious handling. The solution of the road congestion problems can not only be solved by simply improving the quality and quantity of infrastructure, but also the traffic management. In this article, we proposed a method to reduce the traffic congestion by balancing the vehicle loads to a various road segments, called as load balancing. Through this method, it is expected that the traffic load is evenly distributed to various alternative routes, such that, long queues and traffic jam can be avoided. Evaluation of the load balancing’s effectiveness is performed through a simulation by implementing the Queueing Theory. Simulations are created using the SimEvents toolbox that runs on MATLAB software.Keywords: load balancing, road congestion, traffic, simevents, matlab.
Green Teknologi Sintesis Biodisel Dengan Menggunakan Metode Route Non-Alcohol Dengan Katalis Heterogen R Ridwan; E Elfiana; M Mukhsin; Aulia Fikri
Jurnal Sains dan Teknologi Reaksi Vol 20, No 02 (2022): Jurnal Sains dan Teknologi Reaksi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v20i02.3276

Abstract

Saat ini riset mengenai sintesis biodiesel telah banyak dilakukan dengan cara transesterifikasi. Pembuatan biodiesel yang dilakukan secara transesterifikasi dengan reaktan methanol dan katalis basa memiliki banyak kelemahan diantaranya terjadinya reaksi penyabunan dan sulit dipisahkan karena katalis bersifat homogen. Penggunaan biokatalis di lingkungan beralkohol dengan proses transesterifikasi menyebabkan biokatalis terdeaktivasi secara cepat dan stabilitasnya akan menjadi buruk. Melalui Penelitian Diharapkan proses sintetis biodiesel dengan proses interesterifikasi melalui route non-alcohol mampu menjadikan alternatif bahan baku selain mudah didapatkan dan mempunyai manfaat tersendiri dari segi biodiesel yang akan dihasilkan. Dengan menggunakan Green Teknologi metode route non-alcohol menggunakan katalis heterogen Metil asetat KOH. Luaran yang ditargetkan adalah biodiesel dengan kualitas yang meningkatkan sesuai standar SNI, publikasi artikel ilmiah, buku laporan Green Teknologi Sintesis Biodiesel Dengan Menggunakan Metode Route Non- Alcohol Dengan Katalis Heterogen. Penggunaan metil asetat bertujuan sebagai pengganti pemakaian alcohol yang biasanya digunakan pada metode transesterifikasi biodiesel, oleh karena itu metode yang digunakan pada penelitian ini adalah Interesterifikasi biodiesel melalui rute non alcohol dengan menggunakan katalis heterogeny untuk menghasilkan biodiesel dengan kualitas sesuai SNI. Temperatur proses sangat mempegaruhi keberhasilan reaksi pembentuk biodiesel. Perolehan FFA (Free Fatty Acid) biodiesel dengan metode Interesterifikasi terbaik sebesar 2,8 % pada temperature 60℃ masih berada dalam range densitas biodiesel yang mengacu pada SNI 04-7182:2015. Perolehan dengan proses Interesterifikasi menghasilkan nilai angka setana terbaik sebesar 55,6 masih berada dalam range densitas biodiesel yang mengacu pada SNI 04-7182:2015. Pengujian kualitas biodiesel dalam penelitian ini menggunakan analisa GC-MS diperoleh bahwa terbentuknya senyawa metil asetat dan dapat diterapkan untuk pembentukan biodiesel.Kata kunci—  Biodiesel, Green teknologi, Heterogen, Interesterifikasi
Utilization Of Banana Kepok As Active Charcoal For The Process Of Purification Of Used Cooking Oil Using The Adsorption Method S Sariadi; Z Zulkifli; A Adriana; M Yunus; R Ridwan; S Salmyah; Een Setiawati; Isra Adelya Izzati
Jurnal Sains dan Teknologi Reaksi Vol 21, No 01 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i01.4195

Abstract

Used cooking oil or often referred to as used cooking oil is one of the needs for food processing for humans. Repeated processing of cooking oil in the frying process can reduce the quality of the cooking oil. Therefore, one of the efforts to process used cooking oil is adsorption using activated charcoal from kepok banana peels. The use of activated charcoal as an adsorbent can be beneficial because activated carbon can absorb some unwanted odors and reduce the amount of free fatty acids, thereby improving the quality of the oil. The purpose of this study was to study the addition of the amount of kepok banana skin size of activated charcoal (mesh) with adsorption time on the quality of used cooking oil. The variables used were varying the size of the activated carbon particles of 100 mesh, 120 mesh, 140 mesh and 160 mesh with adsorption times of 3 hours, 5 hours and 7 hours. The refined oil will be analyzed for oil density, fatty acid content in the oil, and water content. From the research results it is known that the best particle size is 160 mesh. The density value is 0.889 g/ml. The results obtained are that the density value still does not meet the SNI (2002) cooking oil quality standard requirements, namely 0.900 g/ml. FTIR analysis shows that there is an increase in wave number which is the peak of the OH (hydrogen bond) structure using purified chorcoal. The C=O (carboxylate) FFA molecule is shown around the wave number 1060 cm-1 increasing to 1070 cm-1. Keywords: Adsorption, activated charcoal, kepok banana, free fatty acid (FFA), water content, density
INCREASING THE MECHANICAL PROPERTIES OF BIODEGRADABLE PLASTIC BASED ON POLY LACTIC ACID (PLA) WITH THE ADDITION OF COCONUT COIL (COIR) AND CHITOSAN Dewi Silvia; R Ridwan
Jurnal Sains dan Teknologi Reaksi Vol 21, No 01 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i01.4231

Abstract

Petroleum-based plastics that are difficult to decompose have been used for years to become the biggest environmental polluter.The solution is to replace conventional plastics such as bioplastics with the same quality as conventional plastics so that they can replace the existence of petroleum-based plastics.The innovation of combining natural polymers (poly lactic acid) with coir-chitosan fillers is able to make polymers have good mechanical properties. This study aims to see the effect of mixing the natural polymer poly lactic acid (PLA) with coir (coconut coir) and chitosan fillers. With variations in fiber mass fraction3.8 grams; 3.9 grams; 4 grams; 4.1 grams; 4.2 grand mass variation of chitosan 0.36 gr; 0.38 gr; 0.4 gr; 0.42 gr; 0.44 gr. The addition of coir and chitosan fillers affects the mechanical properties and thermal properties of the material.The synthesized composites were tested for their mechanical strength to determine material characteristics and morphological observations. In the tensile test, the highest tensile strength value was produced by a material with a mass fraction of coir 19% (w/w) and 1.8% (w/w) chitosan, which was 44.23 MPa and the lowest tensile strength value was produced by a material with a mass fraction coir 21% (w/w) and chitosan 2.2% (w/w) of 31.48 MPa. Based on test results Differential Thermal Analysis sample with coir modification 20% (w/w) chitosan 2% (w/w) has the best thermal stability among other samples where the sample begins to degrade (on set) at 461.77 (oC) and stops experiencing degradation (end set ) at a temperature of 531.48 (oC). The results of the morphological test using the SEM tool show that the surface structure of the PLA79.2% sample is more homogeneous due to coir (coconut coir) and chitosan chains are well dispersed into the poly lacti acid (PLA) interlayer. Keywords : Bioplastics, Coir, Chitosan, Biodegradation, Natural Polymers. 
Co-Authors A Adriana Andri Suryadi Anuraga Jayanegara Aulia Fikri D A Astuti Deni Darmawan Dewi Silvia E Elfiana E Yetti Een Setiawati Erwin Harahap G Kartina Isra Adelya Izzati M Mukhsin M Yunus Muhammad Ridla Nahrowi Nahrowi R A Nurfitriani R P Harahap Rakhmat Ceha S Ratnakomala S Salmyah S Sariadi Sadarman Sadarman W D Astuti Y Widyastuti Yundari, Yundari Z Zulkifli