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Gedung Teknik Kimia UNSYIAH Jl. Tgk. Syech Abdurrauf No. 7, Darussalam, Banda Aceh Propinsi Aceh, 23111, INDONESIA
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Jurnal Rekayasa Kimia & Lingkungan
Published by Universitas Syiah Kuala
ISSN : 23561661     EISSN : 14125064     DOI : https://doi.org/10.23955/rkl.v17i2.25520
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
The Journal of Chemical Engineering and Environment is an open access journal that publishes papers on chemical engineering and environmental engineering. The following topics are included in these sciences: a. Food and biochemical engineering b. Catalytic reaction engineering c. Clean energy technology d. Environmental and safety technology e. Fundamentals of chemical engineering and applied industrial engineering f. Industrial chemical engineering g. Material science engineering h. Process and control engineering i. Polymer and petrochemical technology j. Membrane technology k. Agro-industrial technology l. Separation and purification technology m. Environmental modelling n. Environmental and information sciences o. Water and waste water treatment and management p. Material flow analysis q. Mechanisms of clean development
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 251 Documents
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Produksi Pati Termodifikasi dari Beberapa Jenis Pati Cut Erika
Jurnal Rekayasa Kimia & Lingkungan Vol 7, No 3 (2010): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (360.173 KB)

Abstract

Starch is modified for three reasons. First, modified starch provides functional attributes in food applications that native starches normally cannot provide. Second, starch is abundant and readily available. Third, starch can provide an economic advantage in many applications. Process for the production of modified starch comprised the steps of (1) extracting starch from potato and sweet potato, and (2) modifying the starch to produced pre-gelatinized, acid modified, and cold water swelling starch. Tapioca gives the best performance when modified by pre-gelatinization and cold water swelling. The characteristic of the pre-gelatinized tapioca were swelling power 979,782%, water holding capacity 480,391%, moisture contents 8.48%, ash content 0,006%, dan yield 93,358%.Keywords: acid modified, cold water swelling starch, modified starch, pre-gelatinized
Metode-Metode Pengurangan Residu Pestisida pada Hasil Pertanian Bayu Refindra Fitriadi; Ayutia Ciptaningtyas Putri
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 2 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (603.535 KB) | DOI: 10.23955/rkl.v11i2.4950

Abstract

Penggunaan pestisida yang luas pada setiap tahap tanaman di Indonesia menyebabkan banyak residu pestisida yang tertinggal pada hasil pertanian maupun pada lingkungan pertanian. Residu pestisida yang terdapat pada hasil pertanian mempunyai dampak yang buruk bagi kesehatan manusia dan lingkungan. Berbagai macam metode telah dikembangkan untuk mengurangi residu pestisida yang terdapat pada hasil pertanian, baik pada tahap prapanen maupun pada tahap pasca panen. Metode prapanen meliputi penggunaan Agen Pengendali Hayati dan sistem pertanian Pengendalian Hama Terpadu, penggunaan pestisida non persisten, pengaturan waktu aplikasi pestisida, dan penggunaan arang aktif. Sedangkan metode pasca panen meliputi pencucian hasil pertanian, penggunaan ozon dan air terozonisasi, perendaman air panas, penggunaan radiasi ultrasonik dan pengaturan pH. Metode prapanen maupun pasca panen sama baiknya dalam menurunkan kadar residu pestisida pada hasil pertanian dengan memberikan hasil signifikan pengurangan residu pestisida antara 50 - 100%.
The Spatial Distribution of Bed Sediments at Krueng Cut Estuary: The Sieve Analysis Approach Muhammad Irham; Ika Fibriarista; Sugianto Sugianto; Ichsan Setiawan
Jurnal Rekayasa Kimia & Lingkungan Vol 12, No 2 (2017): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (622.752 KB) | DOI: 10.23955/rkl.v12i2.8486

Abstract

This research studied the characteristic of bed sediment in the estuary of Krueng Cut, Banda Aceh. Analyzing the field samples from different site of stations along the channel from upstream to estuary shows different pattern and profile of deposited bed sediment. Therefore, sorting the size of sediment is important spatially because pattern of its deposition and characteristic will illustrate how distribution patterns indicate the nature of the channel.  Hence, the study aims to determain the pattern of bed sediment distribution as well as its profile spatially. To implement the intended purpose, the coring method was employed by using purposive random sampling for 15 stations of taken sampling. The sample of sediment was proceeded by using a 2,5 cm diameter of PVC paralon at the depth of 25 cm from the bathymetry base. Sample was analyzed using wet sieve analysis method. The result informed that the dominant of bed sediment size are medium sand found around the mouth of the river, fine sand existed along the mixing area, and very fine sand occurred in the transition zone. Inthe region of coastal dynamic, the sediment was dominated by medium sand size, meanwhile in the area of river dominated flow, the sediment is subject to fine sand size.Thus, the fraction of very fine sand size of sediment was found in the zona of transition.
Sintesis Kemosensor Anion Senyawa 4-(2,6-difenil-Piridin-4-Il)-2-Metoksi-Fenol Dari Vanilin Arfiani Nur; Bambang Purwono
Jurnal Rekayasa Kimia & Lingkungan Vol 12, No 1 (2017): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.339 KB) | DOI: 10.23955/rkl.v12i1.4957

Abstract

Telah dilakukan sintesis kemosensor anion senyawa 4-(2,6-difenil-piridin-4-il)-2-metoksi-fenol (DPMF). Sintesis senyawa target DPMF dilakukan melalui senyawa antara kalkon dengan rendemen reaksi 77%. Uji sebagai sensor anion dilakukan dalam pelarut DMSO-air terhadap anion F-, Cl-, Br-, CN- dan H2PO4-. Senyawa DPMF ini menghasilkan perubahan warna dari tidak berwarna menjadi kuning pada penambahan anion CN-. Analisis spektrofotometer UV-vis pada senyawa DPMF menghasilkan perubahan λmak = 320 nm ke λmak = 370 nm pada penambahan anion CN-. Limit deteksi terhadap anion CN- sebesar 4,11x10-6M. Senyawa ini juga dapat berperan sebagai kemosensor fluoresen dengan sistem “ON-OFF”. 
Performance of Mixed Matrix Membrane Adsorbers for Lysozyme Separation Saiful Saiful
Jurnal Rekayasa Kimia & Lingkungan Vol 8, No 1 (2011): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.152 KB)

Abstract

An application of EVAL based mixed matrix membrane adsorbers containing a strongcation exchange resins (Lewatit SP 112 WS) for capturing of Lysozyme (LZ) has been investigated.The preparation and performance of the mixed matrix membrane adsorbers is studied with 1-octanol as additive. The membranes in this study are prepared by immersion precipitation out of a DMSO solution containing 14% EVAL and with or without 14% 1-octanol. All membranes contain 65% resin based on dry solids. The morphology of the membranes are characterized using scanning electron microscopy.The membrane structure demonstrated open and interconnected porous structure with large resin particles are distributed in membrane structure. The MMM adsorber proved high adsorption capacity for capturing and concentrating LZ in feed solution. The Mixed matrix membranes (MMM) concept was anticipated as a moderate process with an increasedcapacity and a maximum adsorption capacity of 166 mg LZ/g membrane. The MMM act in protein separations both as protein purifier and concentrator and is an attractive alternative for packed bed systems because of its high capacity, high throughput, robustness, and ease of scaling up.Keywords: Mixed Matrix Membrane (MMM), Lysozyme (LZ), Adsorption, Membrane adsorber
Pengaruh Rasio Aditif Polietilen Glikol Terhadap Selulosa Asetat pada Pembuatan Membran Selulosa Asetat Secara Inversi Fasa Cut Meurah Rosnelly
Jurnal Rekayasa Kimia & Lingkungan Vol 9, No 1 (2012): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (216.367 KB)

Abstract

Preparation of cellulose acetate (CA) membranes with ultrafiltration process had be done by phase inversion using dimethylformamide (DMF) as solvent. Poliethylene glycol (PEG) 1450 Da, as additive, was added with 10, 20, and 30% rasio of celluose acetate. The thin film of polymer solution was immersed on water bath coagulation at room temperature. The analysis of membrane morphology structure by Scanning Electron Microscope (SEM) JSM – 5310 LV, Jeol-Japan showed the asymetric of membrane. The addition of PEG can improve the performance of the membrane. In resulting flux is higher than membranes without PEG. Increasing of PEG/CA ratio resulted in the higher flux with lower of rejection. The higher fluxes of water, dextran, and BSA are 146, 114, and 96 L/m2hr with 52,938 and 75,716% rejection for dextran and BSA.Keywords: cellulose acetate membranes, polyethylene glycol, ultrafiltration
The Study Effect of Fill and React Period Change on the Performance of the Sequencing Batch Reactor Azwar Azwar
Jurnal Rekayasa Kimia & Lingkungan Vol 7, No 1 (2009): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.341 KB)

Abstract

The operation of the sequencing batch reactor (SBR) can be optimized by controlling the dissolved oxygen concentration, the dosage of external carbon, nitrification and denitrification, and the phase length of aeration (fills and react period). In this work, the analyses and tested with open loop identification the effect of fill and react period change on the performance of the SBR were studied. The process dynamic has been tested to determine the effect of Fill (tf) and React (tr)period changes on soluble substrate (Ss), soluble intermediate product (Ps), inert substrate (Si), particulate organics concentration (Xs), active biomass concentration (Xa), inert biomass concentration (Xi), the total biomass concentration (Xto) and the effluent chemical oxygen demand (COD) concentration in the SBR. In all simulations the total Fill and React time were set at 6 h, with the Fill time varied at 0.5 h, 1 h, 1.5 h, 2 h, 2.5 h, 3 h, and the corresponding react time set at 5.5 h, 5 h, 4.5 h, 4 h, 3.5 h, and 3 h, respectively.Keywords: fill time and reaction time, sequencing batch reactor, wastewater treatment
Optimization of Initial pH and Total Sugar Concentration Variables on Citric Acid Production from Pineapple Waste with Aspergillus niger Yeast by Using Response Surface Methodology Widayat Widayat; Abdullah Abdullah; H. Satriadi; M. Hadi
Jurnal Rekayasa Kimia & Lingkungan Vol 8, No 1 (2011): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (248.767 KB)

Abstract

Citric acid can be produced from pineapple waste by using fermentation process. This process is done in bubble column reactor with Aspergillus niger yeast. The objective of this research is to find the optimum conditions of initial pH and total sugar concentration. The optimization method used was response surface methodology. This research was carried out at a temperature of 30 oC, spore concentration of 1.23 x 109 spore/ml, total volume 2.0 liter, flow rate of air 58.07 cc/sec and a 5% antifoam concentration. The fermentation process lasted 7 days and the citric acid concentration was analyzed by High Pressure Liquid Cromatography (HPLC) method. Statistica 6 software was used for the data treatment. The mathematical model for the optimization citric acid fermentation in bubble column reactor is Y = 54.507 + 2.9851X - 8.987X12 - 2.581X2 - 15.446X22 - 7.989X1X2 The parameter of Y is citric acid yield, X1 is a coding initial pH and X2 is a coding total sugar concentration. The results has given an initial pH optimum 3.61 and total sugar concentration 19,285% w/v with optimum an yield of 55.03 % .Keywords: Bubble column bioreactor, Citric acid fermentation, Initial pH, Total sugar concentration, Response surface methodology
Sintesis dan Karakterisasi Membran Poliuretan dari Minyak Biji Karet dan Heksametilen-1,6-diisosianat Salfauqi Nurman; Marlina Marlina; Saiful Saiful; Sitti Saleha
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 4 (2015): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.334 KB) | DOI: 10.23955/rkl.v10i4.3772

Abstract

Minyak biji karet dapat dimanfaatkan untuk pembuatan membran poliuretan. Minyak biji karet memiliki bilangan hidroksi 40,33 mgKOH/g dan bilangan iod 154,05 gI2/g. Sintesis membran poliuretan menggunakan metode ikatan silang. Ikatan silang terbentuk dengan mereaksikan minyak biji karet sebagai sumber gugus -OH dengan heksametilen-1,6-diisosianat sebagai sumber gugus -NCO.  Membran poliuretan yang optimum dihasilkan pada komposisi 4,55:5 (g/g) memiliki sifat homogen, kering, elastis, berwarna kuning kecoklatan, bergelombang, fluks 0,544 L/m2.h.bar dan faktor rejeksi 100%. Hasil karakterisasi membran menunjukkan terbentuknya ikatan uretan pada bilangan gelombang 3480 cm-1, struktur morfologi membran padat, memiliki dua tahap dekomposisi pada 210 oC dan 392 oC, titik transisi gelas 65 oC, kekuatan tarik 1,03 kgf/mm2 dan elongasi 497,14%. Dari hasil karakterisasi membran poliuretan, membran tersebut dapat digolongkan pada tipe membran reverse osmosis.
The Performance and Characterization of Biodegradable Plastic from Tapioca Starch: Effect of Modified Chitosan Lia Ernita; Medyan Riza; Syaubari Syaubari
Jurnal Rekayasa Kimia & Lingkungan Vol 15, No 1 (2020): Jurnal Rekayasa Kimia & Lingkungan (June, 2020)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (678.004 KB) | DOI: 10.23955/rkl.v15i1.15441

Abstract

The performance and characterization of biodegradable plastic from tapioca starch was studied. Modified the chitosan was one of the ingredients for produce  the biodegradable plastics. The produced biodegradable polastic were thin sheet plastic, elastic and transparent. The biodegradable plastic performance had tensile strength between 2,26-3.73 Mpa, elongation ranges from 17.24 to 76.76%, and water absorption ranges from 30.81-268.9%. In antioxidant analyze, apples are wrapped in plastic and had significant mechanical properties changes on 8th day.Morphology scanning result showed that in the chitosan-polyNIPAM there were no cavities may caused high hydrophilicity in the biodegradable plastic.

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