Garuda - Garba Rujukan Digital

p-Index From 2019 - 2024

1.756

P-Index

This Author published in this journals

All Journal Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development METANA JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Waste Technology Indonesian Journal of Biotechnology Jurnal Aplikasi Teknologi Pangan Indonesian Journal of Chemistry ASEAN Journal of Chemical Engineering Journal of Vocational Studies on Applied Research

Siswo Sumardiono

Department Of Chemical Engineering, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia

Author-ID : 391954

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Other

Published : 25 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3

PENGEMBANGAN PROSES MODIFIKASI CASSAVA DENGAN HIDROLISA ASAM LAKTAT DAN UV UNTUK SUBSTITUSI TERIGU DALAM PRODUK PANGAN Sumardiono, Siswo; Pudjihastuti, Isti
METANA Vol 11, No 02 (2015): Desember 2015
Publisher : Universitas Diponegoro

AbstrakÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Pati termodifikasi merupakan produk sangat prospektiv dalam industri makanan. Pertimbangan utama dari penelitian ini adalah meningkatnya volume permintaan import gandum dan kebutuhan akan pati termodifikasi. Metode penelitian yang dilakukan Â adalah dengan hidrolisis asam laktat dan reaksi fotokimia Â UV sebagai katalis terhadap Â tapioka untuk memodifikasi sifat sifat fisikokimia dan rheologi. Tujuan penelitian ini adalah mempelajari pengaruh konsentrasi asam, lama penyinaran lampu UV, dan waktu pengeringan dengan pengering sinar matahari. Variabel percobaan meliputi konsentrasi asam laktat (0,5; 1; 1,5; dan 2%), lama penyinaran dengan lampu UV (10, 15, 20, dan 25 menit) dan waktu pengeringan dengan sinar matahari 4 jam. Tapioka dilarutkan dalam larutan asam laktat pada reaktor tangki berpengaduk yang dilengkapi lampu UV dan kemudian disaring. Tepung tapioka terhidrolisis dikeringkan dengan sinar matahari. Sifat fisikokimia dan rheologi produk ditentukan dengan analisis viskositas, swelling power, kelarutan, daya kembang, hardnes dari roti muffin. Hasil optimum diperoleh 4250 dPa; 26,05; 2,25%; 3,75 ml / g, 160,02 gf, dan 300,35 gf untuk viskositas, swelling power, kelarutan, daya kembang, hardnes samping dan tengah roti muffin. Sifat fisikokimia dan rheologi berubah secara signifikan jika dibandingkan dengan tapioka asli dan gandum. Produk ini diharapkan dapat digunakan untuk substitusi gandum pada produk pangan.Kata kunci: swelling power, hidrolisis asam, UV, baking ekspansiÂ AbstractÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Modified starch is a very prospective conversion starch in the food industry. The main consideration of the research is the increasing volume of wheat import and industries demand of modified starch. The research method is by acid hydrolysis using lactic acid and UV photochemical and reaction as catalyst of tapioca in order to modify physicochemical and rheological properties. The purpose if this research to study the effect of acid concentration, UV lightening, and drying period using sunlight. The experiment variables are lactic acid concentration (0,5; 1; 1,5;and 2%), UV lightening period (10, 15, 20, and 25 minutes) and drying period using sunlight 4 hours. Tapioca was dissolved in lactic acid solution on agitated tank reactor which was lighted by UV lamp and then screened. The hydrolyzed tapioca was the dried by sunlight. The physicochemical and rheological properties of product were determined by viscosity analysis, swelling power, solubility, baking expansion, center and wall hardness of muffin. Optimum result was obtained 4250 dPaâ€™s; 26,05; 2,25%; 3,75 ml/g, 160,02 gf, andÂ 300,35 gf for viscosity, swelling power, solubility, baking expansion, center and wall hardness of muffin respectively. The physicochemical and rheological properties changed significantly compared to initial tapioca and wheat. Moreover, it was expected to use as food product substitution.Â Keywords: swelling power, acid hydrolysis, UV, baking expansion

UPAYA PERBAIKAN SIFAT FISIKOKIMIA TEPUNG UBI KAYU MELALUI PROSES FERMENTASI SAWUT UBI KAYU DENGAN STARTER BAKTERI ASAM LAKTAT LACTOBACILLUS CASEI DAN PEMANFAATANNYA SEBAGAI BAHAN BAKU SNACK TRADISIONAL PILUS DAN ROTI MUFFIN Kusumaningrum, Annisa; Sumardiono, Siswo
METANA Vol 8, No 02 (2012): Desember 2012
Publisher : Universitas Diponegoro

Cassava is one of the biggest commodity in Indonesia which is the total amount of its production is 24,080,000 ton/year. This huge amount of cassava can be used as cassava flour so that it could have similar characteristics with wheat flour. Therefore, in this research the cassava is being modified by fermentation method using the lactic acid bacteria starter,i.e Lactobacillus casei. While the cassava grate is being fermented, the enzyme that could destroy the cassava cell is produced by bacteria so it cause the degradation of starch granula. This condition changes of the physiochemical characteristic of cassava flour produced. The purpose of this research determines the best condition from the variables concentration of lactic acid bacteria starter and fermentation time of the cassava grate to physiochemical characteristic of cassava flour. The best conditions of cassava flour is fermentation time of 48 hour and 6% v/v Lactobacillus casei concentration. Physiochemical characteristic of cassava flour best treatment is the swelling power of 14.13, level of expand â€œpilusâ€ snack 596.399%, baking expansion 2.28 cm /g and hardness of 3 muffin cake was 620.262 gf. Keywords: cassava fermentation, Lactobacillus casei, physiochemical characteristic, fermentation time, concentration of lactic acid bacteria starter

Effect of Organic Waste Addition into Animal Manure on Biogas Production Using Anaerobic Digestion Method Arifan, Fahmi; Abdullah, Abdullah; Sumardiono, Siswo
International Journal of Renewable Energy Development Vol 10, No 3 (2021): August 2021
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2021.36107

One biomass form with a high potential to replace fossil fuels is biogas. Biogas yield production depends on the raw material or substrate used. This research was aimed to investigate aÂ biogas production technique using an anaerobic digestion process based on a substrate mixture of a starter, cow dung, chicken manure, tofu liquid waste, and cabbage waste.Â The anaerobic digestion is a promised process to reduce waste while it is also producing renewable energy.Â Moreover, the process can digest high nutrients in the waste. The anaerobic digestion results showed that the combination producing the highest biogas amount was 200 mg starter mixed with a ratio of 70% cow dung, 15% chicken manure, and 15% tofu liquid waste. The larger the amount of cabbage waste, the lower the biogas production. The quadratic regression analysisÂ was obtained for the variable with the highest yield andÂ the estimated kinetic parameters based on the Gompertz equations revealed that the value of Pâˆž = 2,795.142 mL/gr.Ts, Rm = 113, 983.777 mL/gr.Ts, and t = 10.2 days. The results also concluded that the use of tofu liquid waste produced more biogas than cabbage waste. This study also successfully showed significant development in terms of the amount of biogas produced by adding organic waste to animal manure as the substrate used.

Kajian Sifat Morfologi dan Mekanis Biofoam dari Tepung Tapioka dan Serat Limbah Batang Jagung Sumardiono, Siswo; Pudjihastuti, Isti; Amalia, Rizka
METANA Vol 17, No 1 (2021): Juni 2021
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v17i1.37911

Styrofoam atau polystyrene (PS) foam yang diolah, umumnya digunakan sebagai kemasan makanan. Rendahnya tingkat daur ulang pada polystyrene menyebabkan adanya polusi lingkungan yang merupakan ancaman serius terhadap kehidupan dan kesehatan manusia. Penggunaan styrofoam harus dihentikan dan dilakukan upaya alternatif bahan pengemas lain yang ramah lingkungan. Salah satu alternatif pengganti styrofoam adalah biofoam yang menggunakan bahan baku utama limbah batang tanaman jagung sebagai sumber serat utama dan tepung tapioka sebagai sumber pati. Penelitian ini bertujuan untuk mengembangkan inovasi produksi biofoam biodegradabel dari tepung tapioka dan limbah batang jagung sebagai pengganti styrofoam sintetis di pasaran. Pengaruh penambahan bahan baku limbah batang jagung, tepung tapioka, dan polivinil alcohol (PVA) terhadap sifat fisis produk biofoam telah dipelajari dalam penelitian ini. Berdasarkan hasil pengujian biofoam terbaik diperoleh dari komposisi pati tapioka 56,25 g, serat jagung 18,75 g dan PVA 25 g. Hasil pengujian SEM, menunjukkan bahwa bahwa permukaan biofoam tidak lebih rata dibandingkan styrofoam. Pada hasil foto SEM masih terlihat adanya sedikit granula pati utuh karena pada proses gelatinisasi mengalami pembengkakan (swelling) tetapi belum terdisintegrasi (breakdown). Namun, sebagian besar granula lain mengalami retrogradasi akibat gelatinisasi. Biofoam hasil penelitian memiliki nilai kekerasan yang lebih besar dibandingkan dengan Styrofoam komersial dengan nilai kuat tekan sebesar 14.162 MPa.

Optimization of solid‐state fermentation condition for crude protein enrichment of rice bran using Rhizopus oryzae in tray bioreactor Andhika Cahaya Titisan Sukma; Herawati Oktavianty; Siswo Sumardiono
Indonesian Journal of Biotechnology Vol 26, No 1 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.57561

Enhancement of crude protein content in rice bran with the solid‐state fermentation method in tray bioreactor using Rhizopus oryzae FNCC 6011 has been investigated. This research aimed to optimize the fermentation condition using the response surface methodology (RSM). The central composite design (CCD) with three independent variables, including substrate thickness (1 to 3 cm), fermentation temperature (28 to 32 °C), and nutrient concentration of KH2PO4 (2 to 6 g/L) used to determine the crude protein enrichment. The quadratic model has successfully described the effect of variable interactions on responses very well as indicated by the F value and p‐value are 11.20 and 0.0041, respectively. The multiple correlation coefficients (R2) of 0.9438 indicated that 94.38% of the model data has approached the actual data with a deviation of 5.62%. The interaction between the variable substrate thickness and the fermentation temperature is the most influential variable on the crude protein enrichment of rice bran, indicated by the highest F value of 24.08 and the lowest p‐value of 0.0027. The highest protein increase of 62.51% was obtained at 2 cm substrate thickness, fermentation temperature of 30 °C, and KH2PO4 concentration of 4 g/L.

Effect of Esterification on Cassava Starch: Physicochemical Properties and Expansion Ability Siswo Sumardiono; Listiyana Riska; Bakti Jos; Isti Pudjiastuti
Reaktor Volume 19 No. 1 March 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

In this study, the characteristic of cassava starch have been developed through esterification reaction using ethyl lactate. Commercial cassava starch was modified by using (0.5; 0.75; 1.00; 1.25; 1.50 % v/v) ethyl lactate solution with pH 6, 7, 8, 9 for 15, 25, 35, 45, 55 minutes and the drained starch was dried with sun drying. The cassava starch which has been esterified with 1.5% ethyl lactate for 15 minutes pH 6 gave highest volume expansion of 2,438.9 %. For swelling power, the highest value was 19.32 swelling power at variable concentrations of 1.5% ester, esterification period of 15 minutes, and pH 6. The lowest amylose content was 15.68 % in ester concentration of 1.5 %. From the scanning electron micrograph, shows that the cassava starch after and before modification has not changed since the modifications performed under the gelatinization temperature. FTIR spectra of native cassava starch and ester cassava starch shown shift of the carboxyl group of starch from 1072.37 to 1087.80 cm-1 and a decrease in the OH group is from 3452.53 to 3417.81 cm-1. Bond formed indicates that the esterification reaction occurs between cassava starch with ethyl lactate esters. Keywords: volume expansion, cassava starch, ester starch, ethyle lactate, modified starch

ULTRAFILTRATION AS PRETREATMENT OF REVERSE OSMOSIS: LOW FOULING ULTRAFILTRATION MEMBRANE PREPARED FROM POLYETHERSULFONE–AMPHIPHILIC BLOCK COPOLYMER BLEND Heru Susanto; Luqman Buchori; Siswo Sumardiono; Berkah Fajar; Titik Istirokhatun; I Nyoman Widiasa
Reaktor Volume 12, Nomor 4, Desember 2009
Publisher : Dept. of Chemical Engineering, Diponegoro University

This paper demonstrates the preparation of polyethersulfone (PES) ultrafiltration (UF) membranes via wet phase inversion method using either poly(ethylene oxide)-b-poly(propylene oxide)-b- poly(ethylene oxide) (Pluronic®, Plu) or polyethylene glycol (PEG) as hydrophilic modifier. Their effects on membrane structure as well as the resulting membrane performance and their stability in membrane polymer matrix were systematically investigated. The investigated membrane characteristics include surface hydrophilicity (by contact angle), surface chemistry (by FTIR spectroscopy) and water flux measurement. Visualization of membrane surface and cross section morphology was also done by scanning electron microscopy. The membrane performance was examined by investigation of adsorptive fouling and ultrafiltration using solution of bovine serum albumin as the model system. The stability of additive was examined by incubating the membrane in water (40oC) for up to 10 days. The results show that modification effects on membrane characteristic and low fouling behavior were clearly observed. Further, amphiphilic Pluronic generally showed better performance than PEG.

Organic Fertilizer Production From Cattle Waste Vermicomposting Assisted By Lumbricus Rubellus Siswo Sumardiono; R.P. Djoko Murwono
International Journal of Science and Engineering Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

Composting is decomposition of compound in organic waste by specific treatment using microorganism aerobically. Natural composting for producing organic fertilizer from manure and market waste utilize long time processing and less equal to the market demand. Vermicomposting is a technique to produce high quality compos fertilizer from biodegradable garbage and mixture of red worm (Lumbricus Rubellus). In conventional compos production took 8 weeks of processing time, in vermicomposting only took half processing time of conventional technique. It is occurred by red worm additional ease cellulose degradation contain in manure which is could not decomposed with composting bacteria. The purposes of this research are to investigate the effect of manure comparison to red worm growth and to evaluate the effect of comparison between manure and market waste to red worm growth. This research was conducted by vary the weight of red worm (100 gr, 200 gr, 300 gr, 400 gr, 500 gr) and market waste addition (50 gr, 100 gr, 150 gr, 200 gr, 300 gr). Moreover, 3 kg of manure was mixed by various weight of red worm, while variation of market waste addition was involved 500 gr red worm and 3 kg manure mixture. Optimum increasing weight of red worm that was obtained by 100 gr red worm addition is 160 gr within 2 weeks. In added market waste variation, the highest increasing of red worm was resulted by 50 gr market waste addition, with 60 gr increasing weight of red worm. Production of casting fertilizer was highly effected by composition of used materials such as medium, manure and red worm comparison as well as market waste additional

Biogas Production Using Anaerobic Biodigester from Cassava Starch Effluent S. Sunarso; B. Budiyono; Siswo Sumardiono
International Journal of Science and Engineering Vol 1, No 2 (2010)
Publisher : Chemical Engineering Diponegoro University

IKMs’ factory activity in Margoyoso produces liquid and solid wastes. The possible alternative was to use the liquid effluent as biogas raw material. This study focuses on the used of urea, ruminant, yeast, microalgae, the treatment of gelled and ungelled feed for biogas production, pH control during biogas production using buffer Na2CO3, and feeding management in the semi-continuous process of biogas production that perform at ambient temperature for 30 days. Ruminant bacteria, yeast, urea, and microalgae was added 10% (v/v), 0.08% (w/v), 0.04% (w/v), 50% (v/v) of mixing solution volume, respectively. The pH of slurry was adjusted with range 6.8-7.2 and was measured daily and corrected when necessary with Na2CO3. The total biogas production was measured daily by the water displacement technique. Biogas production from the ungelling and gelling mixture of cassava starch effluent, yeast, ruminant bacteria, and urea were 726.43 ml/g total solid and 198 ml/g total solid. Biogas production from ungelling mixture without yeast was 58.6 ml/g total solid. Biogas production from ungelling mixture added by microalgae without yeast was 58.72 ml/g total solid and that with yeast was 189 ml/g total solid. Biogas production from ungelling mixture of cassava starch effluent, yeast, ruminant bacteria, and urea in semi-continuous process was 581.15 ml/g total solid. Adding of microalgae as nitrogen source did not give significant effect to biogas production. But adding of yeast as substrate activator was very helpful to accelerate biogas production. The biogas production increased after cassava starch effluent and yeast was added. Requirement of sodium carbonate (Na2CO3) to increase alkalinity or buffering capacity of fermenting solution depends on pH-value

Biogas production from bioethanol waste: the effect of pH and urea addition to biogas production rate Budiyono Budiyono; Iqbal Syaichurrozi; Siswo Sumardiono
Waste Technology Vol 1, No 1 (2013)
Publisher : Diponegoro University

Anaerobic treatment is a good choice to treat bioethanol waste due to the high concentration of COD content for producing biogas as renewable energy. The purposes of this study were to study the effect of addition nitrogen source and pH control to biogas production. The laboratory scale-anaerobic digestions used in this experiment were operated in batch system and at room temperature. In determination of optimum pH, bioethanol waste and rumen fluid fed into digesters with initial pH 6.0; 7.0 and 8.0. Influent COD : N ratio (in form of urea) used in this study was 700:7 in compare to control. The results showed that initial pH 7.0 produced the most biogas with total biogas 3.81 mL/g COD. While initial pH 6 and pH 8 had total biogas 3.25 mL/g COD and 3.49 mL/g COD respectively. At urea addition, biogas formed had 52.47% greater than that of at without urea addition (control variable). Controlled pH caused biogas was produced until 90-day investigation and might continue to be produced. Total biogas of control variable (without urea addition) and variable with ratio COD:N=700:7 influent were 11.07 mL/g COD and 11.41 mL/g COD respectively.Doi: http://dx.doi.org/10.12777/wastech.1.1.1-5Citation: Budiyono, Syaichurrozi, I. and Sumardiono, S. 2013. Biogas production from bioethanol waste: the effect of pH andurea addition to biogas production rate. Waste Technology 1(1):1-5. Doi: http://dx.doi.org/10.12777/wastech.1.1.1-5

Co-Authors A Abdullah Abdullah Abdullah Abdullah Farhan Andhika Cahaya Titisan Sukma Anggun Puspitarini Siswanto Annisa Kusumaningrum Annisa Kusumaningrum Aulia Rahman Majid B Budiyono Bakti Jos Bakti Jos Berkah Fajar Budiyono Budiyono Desti Permata Sari Devi Marietta Siregar Edy Supriyo Fadillah Fathir Mahmud Fofana Fahmi Arifan Ferry Nanda Ardhianto Gita Permana Putra Herawati Oktavianty Heri Cahyono Heru Susanto I Nyoman Widiasa Ihwan Fauzi Iqbal Syaichurrozi Isti Pudjiastuti Isti Pudjihastuti Ivan Aditya Gunawan Listiyana Riska Listiyana Riska Luqman Buchori Maria Octoviane Dyan Mayang Gitta Pawitra Muchlis Riki Darmawan Nearya Sondang Patrick Andreas R.P. Djoko Murwono Rahim Arlanta S Rizka Amalia Rizka Amalia Rizki B Rakhmawati Sunarso . Titik Istirokhatun Tutuk Djoko Kusworo Y Yufidani

Title

Found 25 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 25 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 25 Documents
Search