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All Journal Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development TEKNIK METANA Jurnal Ilmu Lingkungan Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Majalah Ilmiah MOMENTUM Jurnal Rekayasa Mesin Jurnal Teknologi Pangan Innovative: Journal Of Social Science Research Jurnal Profesi Insinyur Indonesia
Noer Abyor Handayani
Departemen Teknik Kimia Fakultas Teknik Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Transportation Veterinary Other

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PEMINDAHAN ION KALIUM (ION MELASSIGENIK) DARI LARUTAN GULA DENGAN PROSES ELEKTRODIALISIS Kusumawati, Miranti Budi; Handayani, Noer Abyor; Widiasa, I Nyoman
Jurnal Ilmu Lingkungan Vol 11, No 1 (2013): April 2013
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.11.1.30-35

Abstract

ABSTRAK Gula mentah perlu melewati proses penyisihan komponen anorganik terutama ion melassigenik sebelum memasuki tahap kristalisasi. Sekarang ini teknologi penyisihan komponen anorganik yang umum digunakan dalam industri gula adalah resin penukar ion. Tujuan penelitian ini adalah untuk mengembangkan teknologi elektrodialisis sebagai alternatif teknologi serta mengkaji perubahan konsentrasi ion (TDS), pH dalam diluat dan dalam larutan pencuci elektroda serta perubahan arus selama proses elektrodialisis. Stack ED yang digunakan memiliki satu kompartemen diluat, satu kompartemen anoda dan satu kompartemen katoda. Membran penukar kation komersial MC-3470 dan membran penukar anion MA-3475 digunakan sebagai lapisan perpindahan selektif untuk stack ED ini. Unit ED ini dioperasikan secara batch. Semua pengujian dilakukan pada temperatur kamar. Untuk setiap percobaan digunakan larutan gula segar dan larutan segar gula-KCl sesuai variabel. Tegangan diatur 15 volt. Pembelajaran menunjukkan bahwa terjadi perubahan perubahan konsentrasi ion (TDS), pH dalam diluat dan larutan pencuci elektroda serta perubahan arus selama proses Elektrodialisis. Dari penelitian yang dilakukan dapat disimpulkan bahwa dengan proses Elektrodialisis dapat disisihkan komponen anorganik (KCl) rata-rata sebesar 98.8%. Kata kunci : Elektrodialisis, ion Kalium, membran penukar ion, rafinasi gula
POTENSI MIKROALGA SEBAGAI SUMBER BIOMASA DAN PENGEMBANGAN PRODUK TURUNANNYA Noer, Abyor Handayani; Dessy, Ariyanti
TEKNIK Volume 33, Nomor 2, Tahun 2012
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (145.009 KB) | DOI: 10.14710/teknik.v33i2.4384

Abstract

The first use of microalgae by humans as food detected in the dates back 2000 years, but the development ofbiotechnology of microalgae just began in the middle of this century. Microalgae refer to biomass resourcecontain many useful components such as protein, carbohydrate, fatty acid, etc. Products based microalgae arediverse from human food and nutrition, animal feed and nutrition up to fine chemicals such as triglycerideswhich is able to be converted to biodiesel. Microalgae is a promising biomass resources, (i) microalgae isrenewable resources which has high biodiversity properties, (ii) production cost of converting process frommicroalgae biomass into its derivatives relatively low, (iii) product derivatives of microalgae have a highdemand in market. Based on above, microalgae can be developed further to be applied as raw material for food,energy and pharmacy. This paper described microalgae in general and the developing technology used toproduce commercial microalgae based product.
MODIFIKASI TEPUNG UBI JALAR UNGU (Ipomoea batatas L. Poir) DENGAN METODE HEAT MOISTURE TREATMENT (HMT) SEBAGAI BAHAN BAKU PEMBUATAN MI INSTAN Santosa, Herry; Handayani, Noer Abyor; Bastian, Hasbi Ashidqi; Kusuma, Ilga Mega
METANA Vol 11, No 01 (2015): Juli 2015
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (121.607 KB) | DOI: 10.14710/metana.v11i01.12580

Abstract

Abstrak Mi instan merupakan makanan yang cukup popular di Indonesia. Selain praktis dan murah, mi instan memiliki kandungan gizi yang cukup sebagai pengganti makanan pokok seperti beras. Pada umumnya,  mie instan dibuat dari bahan baku tepung gandum. Namun, tidak semua orang dapat mengonsumsi mi instan dengan bahan baku tepung gandum ini. Oleh karena itu, tepung ubi jalar merupakan alternatif sebagai bahan baku pembuatan mi instan. Tujuan dari penelitian ini adalah karakterisasi tepung ubi jalar ungu, menentukan waktu dan suhu modifikasi paling baik. Penelitian dilakukan melalui tiga tahap; 1.Tahap pembuatan tepung ubi jalar ungu; 2.Tahap karakterisasi tepung ubi jalar ungu; 3.Tahap modifikasi tepung ubi jalar ungu dengan menggunakan metode modifikasi Heat Moisture Treatment (HMT). Dari tahap karakterisasi diketahui bahwa tepung ubi jalar ungu memiliki nilai swelling power sebesar 3,1 g/g; solubility sebesar 2,8 %, yang masih berada di bawah nilai swelling power dan solubility tepung gandum, sehingga diperlukan tahap modifikasi. Waktu modifikasi dan suhu modifikasi berpengaruh positif pada sifat fungsional tepung ubi jalar ungu yaitu swelling power dan solubility. Untuk mendekati swelling power dan solubility dari tepung gandum, modifikasi lebih baik dilakukan pada suhu 60 ºC selama 5 jamKata kunci : tepung ubi jalar ungu, Heat Moisture Treatment, Mi instan, Swelling power, solubility  Abstract Instant noodle is a well-known food in Indonesia. Aside of it’s simplicity and cheap, instant noodle have enough nutrition as a substitute for main food like rice. Usually, instant noodle is made from wheat flour as material. But, not every people could use this instant noodle as their daily meal.. Therefore, purple sweet potato could be an alternative as a substitute material of instant noodle. The purposes of this study is to examine functional properties of the purple sweet potato flour, and determining best time and temperature modification. To achieve the purposes, this study is done through three stages; 1. Production stage of the purple sweet potato flour; 2.Characterization stage of the purple sweet potato flour; 3.Modification stage of the purple sweet potato flour using Heat Moisture Treatment (HMT) modification method. From the characterization stage is known that the purple sweet potato flour has swelling power 3,1 g/g; solubility 2,8 % so it is necessary to be modified. Time modification and temperature modification giving a positif effect to functional properties of the purple sweet potato flour that is swelling power and solubility. In order to closing the swelling power and solubility with wheat flour, modification is better be doing at 60 ºC for 5 hours long. Keywords: Purple Sweet Potato Flour, Heat Moisture Treatment, Instant Noodle, Swelling power, solubility  
MIKROALGA SEBAGAI SUMBER BIOMASA TERBARUKAN: TEKNIK KULTIVASI DAN PEMANENAN Ariyanti, Dessy; Handayani, Noer Abyor
METANA Vol 6, No 02 (2010): Desember 2010
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (198.5 KB) | DOI: 10.14710/metana.v6i2.3431

Abstract

Abstract   For millennia, aquatic environment has been a source of food, minerals, and natural products to fulfill human’s need. In order to resolved problem due to increment of population, the development of product microalgae based which is one of renewable resource absolutely needed.   There are two important processes in biotechnology of microalgae, microalgae cultivation and harvesting. Common cultivation methods used in growing microalgae are open raceway pond system and closed photobioreactor system. While harvesting methods used is flocculation, centrifugation and filtration. This paper described briefly the methods used in cultivation and harvesting of microalgae.   Keywords: microalgae, cultivation, harvesting
Penentuan Proses Pretreatment untuk Pemanfaatan Limbah Kulit Singkong sebagai Bahan Baku Bioetanol melalui Hidrolisa Enzimatis menggunakan Aspergillus spp. Ariyanti, Dessy; Purbasari, Aprilina; Kusumayanti, Heny; Handayani, Noer Abyor
METANA Vol 15, No 1 (2019): Juni 2019
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (785.67 KB) | DOI: 10.14710/metana.v15i1.22965

Abstract

Ketergantungan terhadap bahan bakar fosil ini menjadi masalah besar yang sangat mendesak untuk segera diselesaikan. Salah satu langkah solusi yang bisa dilakukan adalah memanfatkan bioetanol lignoselulosa dari limbah kulit singkong sebagai alternatif pengganti. Permasalahan utama yang menghambat penggunaan kulit singkong sebagai bahan baku utama pembuatan bioetanol adalah belum adanya proses pretreatment dan hidrolisa yang terbukti efektif secara teknis maupun ekonomis untuk mengkonversi lignoselulosa yang terkandung dalam kulit singkong menjadi bentuk gula sederhana. Penelitian ini dilaksanakan untuk mengetahui efektifitas proses pretreatment dan hidrolisa untuk mengkonversi lignoselulosa yang terkandung dalam kulit singkong menjadi bentuk gula sederhana. Metode pretreatment asam (H2SO4) dan organosolv (Etanol + CH3COONa) terbukti dapat meningkatkan yield gula tereduksi hingga 50% dibandingkan dengan proses hidrolisa tanpa pretreatment. Yield hingga 78% dapat diperoleh pada proses pretreatment asam suhu 30oC, waktu 30 menit yang dilanjutkan dengan hidrolisa enzimatik dengan Aspergillus niger selama 48 jam. Peningkatan yield pada proses pretreatment organosolv (optimum 74% pada suhu 30oC, waktu 90 menit) masih dapat dilakukan dengan meningkatkan waktu operasi dan meningkatkan suhu operasi. Namun peningkatan suhu maupun penambahan waktu operasi berpengaruh terhadap analisa teknis dan ekonomis dari proses. Secara teknis, pretreatment organosolv lebih mudah dilakukan terutama pada proses dengan kondisi operasi atmosferik dibandingkan dengan pretreatment asam karena sifat bahan kimia yang digunakan dan penanganannya. Secara ekonomis, pretreatment asam lebih baik untuk diaplikasikan dibandingkan pretreatment organosolv, hal ini dikarenakan yield yang dihasilkan lebih tinggi pada kondisi proses atmosferik. Lignocellulose material derived from cassava peel can be utilized as raw material for bioethanol production. The utilization of this material can be part of solution in order to maintain Indonesia’s energy security which still majority covered by the fossil fuel. The main problem of lignocellulose conversion into bioethanol is their crystalline structures those make them really difficult to be converted into monomeric sugar prior fermentation to produce ethanol. The objective of this research is to find out the effectiveness of pre-treatment process prior enzymatic hydrolysis of lignocellulose contained on cassava peel. The result shows pre-treatment methods both acid (H2SO4) and organosolv (Etanol + CH3COONa) proved to be effective in order to increase the yield of total reducing sugar (TRS) until 50% after enzymatic hydrolysis compared to the sample without pre-treatment. Highest yield 78% can be achieved by applying acid pre-treatment under temperature 30oC and 30 minutes of process prior enzymatic hydrolysis by Aspergillus niger under temperature 35oC for 48 hours. Further optimization in organosolv pre-treatment can be conducted by increasing the temperature and prolong the process into certain extent. It should be noted that the above action could influence the feasibility of the organosolv pre-treatment technically and economically. From technical point of view, organosolv pre-treatment can be more feasible compared to acid pre-treatment (under atmospheric condition) as the reagents are easy to handle in terms of safety consideration. However, from economic side acid pre-treatment is more preferable as higher yield of the process and lower volume of chemical can be used in order to achieve the same amount of product. 
Potency of Solar Energy Applications in Indonesia Handayani, Noer Abyor; Ariyanti, Dessy
International Journal of Renewable Energy Development Vol 1, No 2 (2012): July 2012
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.1.2.33-38

Abstract

Currently, 80% of conventional energy is used to fulfill general public's needs andindustries. The depletion of oil and gas reserves and rapid growth in conventional energyconsumption have continuously forced us to discover renewable energy sources, like solar, wind,biomass, and hydropower, to support economic development in the future. Solar energy travels at aspeed of 186,000 miles per second. Only a small part of the radiant energy that the sun emits intospace ever reaches the Earth, but that is more than enough to supply all our energy demand.Indonesia is a tropical country and located in the equator line, so it has an abundant potential ofsolar energy. Most of Indonesian area get enough intensity of solar radiation with the average dailyradiation around 4 kWh/m2. Basically, the solar systems use solar collectors and concentrators forcollecting, storing, and using solar radiation to be applied for the benefit of domestics, commercials,and industrials. Common applications for solar thermal energy used in industry are the SWHs, solardryers, space heating, cooling systems and water desalination.
Biofixation of Carbon dioxide by Chlamydomonas sp. in a Tubular Photobioreactor Hadiyanto, H; Sumarno, S; Nur Rostika, Rufaida; Abyor Handayani, Noer
International Journal of Renewable Energy Development Vol 1, No 1 (2012): February 2012
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.1.1.10-14

Abstract

The biogas production from anaerobic digestion is a potential fuel for power generators application, if biogas can be upgraded to the same standards as fossil natural gas by CO2, H2S, and other non-combustible component removal. Microalgae Chlamydomonas sp. has potency to biofix the carbon dioxide and can be used as an additional food ingredient. The variations of flow rate and carbon dioxide concentration in the process resulting different value of biomass production and carbon dioxide biofixation. Biomass production at 40% carbon dioxide concentration obtained 5.685 gr/dm3 at 10% carbon dioxide concentration obtained 4.892 gr/dm3. The greatest value of carbon dioxide absorption occurs at a 40% concentration amounting to 12.09%. The rate of growth and productivity of microalgae tend to rise in 10% and 20% (%v) carbon dioxide concentration, but began started a constant at 30% and 40% (%v) carbon dioxide concentration. Biomass production tends to increase in light conditions while a constant in dark conditions. This study used Chlamydomonas sp. as media culture and performed on bubble column and tubular reactor with 6 litres of culture medium at a temperature of 28oC and atmospheric pressure.
FORTIFIKASI INORGANIK ZINK PADA TEPUNG UBI JALAR UNGU SEBAGAI BAHAN BAKU BUBUR BAYI INSTAN Noer Abyor Handayani; Herry Santosa; Bunga Profegama; Aditya Yuna
Reaktor Volume 15, No.2, OKTOBER 2014
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.042 KB) | DOI: 10.14710/reaktor.15.2.111-116

Abstract

Fortifikasi zink pada bubur instan bayi berbahan dasar tepung ubi jalar ungu diharapkan mampu memberikan inovasi produk yang dapat mengatasi permasalahan defisiensi zink pada balita. Penelitian ini bertujuan untuk mengkaji pengaruh konsentrasi fortifikan inorganic (ZnO) terhadap sifat fisik (penampilan fisik, densitas kamba, dan daya rehidrasi) dari produk instan. Bubur bayi instan yang dihasilkan melalui tahap pembuatan tepung, fortifikasi zink, dan tahap pembuatan bubur bayi instan. Bubur bayi instan tanpa fortifikan digunakan sebagai variabel kontrol. Hasil penelitian menunjukkan bahwa konsentrasi zink pada bubur bayi instan berhasil meningkat, namun tingkat efektifitas dari fortifikasi sangat rendah. Fortifikasi inorganik zink dapat menurunkan 27,6% nilai densitas kamba dan mampu menaikkan 15% daya rehidrasi dibandingkan dengan bubur bayi instan tanpa fortifikan. Terdapat perubahan warna dari bubur bayi instan setelah mengalami proses fortifikasi zink.
Encapsulation of Lemongrass Extract (Cymbopogon citratus) Coated Alginate/Chitosan Using Gelation Method Aji Prasetyaningrum; Sadam Arrois; Fitri Lafifa; Aat Zaki Mubarok; Fadlillah Fani; Noer Abyor Handayani; Ratnawati Ratnawati; Bakti Jos
Reaktor Volume 21 No. 3 September 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (489.034 KB) | DOI: 10.14710/reaktor.21.3.124-132

Abstract

Lemongrass (Cymbopogon citratus) is a medicinal plant with various biological activities such as antibacterial, antifungal, antiprotozoal, anti-inflammatory, and antioxidant. This study aimed to encapsulate lemongrass bioactive in alginate/chitosan complex by enhancing the properties of CaCl2 crosslinked incorporated with tween 80 by ionic gelation method. The hydrogel was prepared by mixing alginate solution (2% w/v) and chitosan solution (1% w/v) with a ratio (1:1 v/v). Tween 80 (2% v/v) was added as a dissolution enhancer and CaCl2 as a crosslinker agent. The formulation varying by concentration of CaCl2 (0.1M to 0.3M) and lemongrass extract (2% to 12%). Encapsulation lemongrass with alginate-chitosan beads is characterized to determine encapsulation efficiency, swelling study, morphology, functional groups, and release study. The results showed that encapsulation efficiency ranged from 74.81% to 83.07%. Encapsulation efficiency increased with the addition of CaCl2 and lemongrass extract concentration. The swelling ratio ranged from 27.29 to 37.81, it will decrease with the addition of CaCl2 and lemongrass extract concentration. The Scanning Electron Microscopy (SEM) analysis of hydrogel beads shows a polyhedral shape, porous, and rough surface which indicates bioactive of lemongrass trapped on the beads. The Fourier Transform Infrared Spectroscopy (FTIR) results show new peaks at 1734 cm-1 as carbonyl stretch vibrations in ketones, aldehydes, and carboxylic acids, indicating the addition of lemongrass extract. Bioactive of lemongrass extract loaded alginate-chitosan beads was successfully released as much as 87.12% at pH 6.8. This study suggested the strong potential alginate-chitosan beads as an encapsulating agent for lemongrass extract using the ionic gelation method, and it has potential as a drug delivery system.Keywords: encapsulation; lemongrass; alginate; chitosan; CaCl2
Fortifikasi Seng (Zn) pada Beras Analog Berbahan Dasar Tepung dan Pati Ubi Ungu Noer Abyor Handayani; herry santosa; aprilina purbasari; heny kusumayanti; dessy ariyanti
Reaktor Volume 16 No.4 Desember 2016
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (536.366 KB) | DOI: 10.14710/reaktor.16.4.183-188

Abstract

ZINC FORTIFICATION OF ARTIFICIAL RICE FROM PURPLE SWEET POTATO FLOUR AND STARCH. Zinc deficiency is believed to be as common as that of iron, with equally negatives consequences. Fortification of artificial rice with zinc is a cost-effective method that can be used to solve this problem. In the present study, artificial rice made from purple sweet potatoes flour and starchwere evaluated as food vehicles for fortification with zinc. This study consists of four main stages, preparation of flour and starch of purple sweet potatoes, zinc fortification, and artificial rice production. Zinc sulphate and zin acetate were used as the fortificant, and added at a level 50, 75, 100, and 125 ppm. Artificial rice fortified with zinc has been successfully carried out. Zinc concentrations in fortified artificial rice are higher than unfortified rice. Artificial rice has a porous structure, in order to improve the rehydration capacity.      Keywords : Artificial rice, Zinc (Zn) fortification , Purple weet potato flour, Purple sweet potato starch,  Defisiensi seng dipercaya telah meluas dan memiliki pengaruh negatif yang sama dengan defisiensi besi. Fortifikasi seng pada beras analog dipercaya dapat mengatasi permasalahan tersebut. Berdasarkan penelitian dengan variasi penambahan konsentrasi Zn pada beras analog ubi ungu. Penelitian ini menggunakan beras analog yang terbuat dari tepung dan pati ubi ungu sebagai food vehicle. Penelitian ini terdiri dari 4 tahapan utama, pembuatan tepung dan pati ubi ungu, tahap fortifikasi seng, dan proses pembuatan beras analog. Seng sulfat dan seng asetat ditambahkan pada konsentrasi 50, 75, 100, dan 125 ppm. Beras analog terfortifikasi seng memiliki konsentrasi seng yang lebih tinggi bila dibandingkan dengan beras analog tanpa fortifikan. Beras analog terfortifikasi seng juga memiliki struktur berpori sehingg dapat meningkatkan kemampuan rehidrasi.   Kata Kunci : Beras analog, Fortifikasi Seng (Zn), Pati ubi ungu, Tepung ubi ungu
Co-Authors Aat Zaki Mubarok Adina, Alifia Rizki Aditya Yuna Aditya Yuna Adristy, Vania Zulfa Aji Prasetyaningrum Ananta, Reza Aprilina Purbasari Ariyanti Dessy Bakti Jos Berlian Arswendo Adietya Bunga Profegama Bunga Profegama Denis Denis Dessy Ariyanti Dessy Ariyanti Diah Susetyo Retnowati Faadhilah, Hilmi Rifaa Fadlillah Fani Fitri Lafifa H Hadiyanto Hargono Hargono Harles, Hendra Hasbi Ashidqi Bastian, Hasbi Ashidqi Heny Kusumayanti Herry Santosa Herry Santosa I Nyoman Widiasa Ilga Mega Kusuma, Ilga Mega Kristinah Haryani Kristinah Haryani Kristinah Haryani Miranti Budi Kusumawati Naniek Utami Handayani Nita Aryanti Putri, Sheila Amanda Ratnawati Ratnawati Rufaida Nur Rostika S Sumarno Sadam Arrois Sulardjaka Sulardjaka Yuliani, Sari