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MODIFIKASI TAPIOKA DENGAN KOMBINASI PROSES HIDROLISA ASAM LAKTAT DAN OKSIDASI HIDROGEN PEROKSIDA UNTUK MENINGKATKAN DAYA KEMBANG Siregar, Devi Marietta; Sari, Desti Permata; Sumardiono, Siswo
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 1, Nomor 1, Tahun 2012
Publisher : JURNAL TEKNOLOGI KIMIA DAN INDUSTRI

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Abstract

Indonesia is one of the largest wheat importer. Wheat is consumed by most of Indonesian. Nowadays, the government is trying to find alternative material to substitute wheat with local material named cassava. Cassava is chosen because it has good potential to be developed in Indonesia. Native starch requires long time in reacting and cooking. Hence, the native starch with high purity can be readily modified by physical, chemical and enzyme process to many diversified products to improve the starch functionality and, consequently, encourage more industrial application. On this research, cassava starch modification is produced by combination lactic acid hydrolysis and oxidation using hydrogen peroxide. The results of this research are expected to be a food innovation in small and medium industries.The conclusion that we get is combination lactic acid hydrolysis and oxidation using hydrogen peroxide can increase the expansion of starch. The highest values for the sum of carbonyl dan carboxyl occured at pH 5, hydrogen peroxide concentration 2 %, temperature 40oC, and baking expansion 3,03 cm3/gr. The condition of oxidation that presented the carbonyl and carboxyl content of starch similar to the sun-dried cassava starch. The oxidation with H2O2 provides after hydrolisis cassava starch and produces more homogenous product. Optimal composition of the use of tapioca starch modification bread is 25% of modified tapioca and 75% of wheat flour which has baking expansion 3,03 cm3/gr.
PENGEMBANGAN PRODUKSI BIOGAS DARI LIMBAH PEMBUATAN BIODIESEL JARAK PAGAR (Jatropha curcas seed cake) Yufidani, Y; Jos, Bakti; Sumardiono, Siswo
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 3, Tahun 2013
Publisher : JURNAL TEKNOLOGI KIMIA DAN INDUSTRI

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Abstract

Biogas is a fermentation process using anaerobic bacteria to convert organic compounds into gas with high composition of methane. Use of jatropha curcas as a biodiesel’s resources remains a problems, seed cake of jatropha curcas contains phorbol esters that is toxic. This research focused on getting an optimum yield of biogas production from jatropha curcas seed cake using additive material to reach optimum C/N ratio. Optimum C/N ratio on biogas production was range 20-30, but jatropha curcas seed cake had C/N ratio about 9/1, so it needs to be added carbon source in order to achieve optimum C/N ratio. Carbon sources that added were paddy straw and tapioca wastewater as a solvent. Process of biogas production in this research use 3 variables, that are the number of jatropha seed cake total solid, the addition of paddy straw, and using tapioca wastewater as solvent. The result showed that the optimum composition in biodigester was jatropha seed cake 6% w/v, paddy straw 3% w/v, ruminant bacteria 10% v/v, and water as solvent. The yield of biogas reached 0,163 m3/kg total solid.
STUDI EKSPERIMENTAL ALAT PENGERINGAN GABAH SISTEM RESIRKULASI KONTINYU TIPE KONVEYOR PNEUMATIK Riska, Listiyana; Arlanta S, Rahim; Sumardiono, Siswo
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 2, Tahun 2013
Publisher : JURNAL TEKNOLOGI KIMIA DAN INDUSTRI

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Abstract

Drying paddy by using conventional method is irrelevant to used nowadays. The need of grain increasing each year is one of the main factor that pushes scientist to invent new methods of drying paddy grain. The old method is unusefull since it takes up space, needed the sun as the drying media which causes a long drying time. One of the alternative of drying paddy grain is by using mechanic dryer. By using this type of dryer, the process of drying takes faster comparing to the old method and the distribution of grain is supplied continuously. The dryer which uses pneumatic conveyor can be one of the solution due to its less energy consumption, a better drying result and high drying capacity. The variable used to identify drying performance is temperature and loading weight. From the experiment, it is resulted that the best temperature for drying paddy grain is 60 C with the weight loading of 150 gram.
MODIFIKASI TAPIOKA DENGAN KOMBINASI PROSES HIDROLISA ASAM LAKTAT DAN OKSIDASI HIDROGEN PEROKSIDA UNTUK MENINGKATKAN DAYA KEMBANG Sari, Desti Permata; Siregar, Devi Marietta; Sumardiono, Siswo
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 1, Nomor 1, Tahun 2012
Publisher : JURNAL TEKNOLOGI KIMIA DAN INDUSTRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (87.926 KB)

Abstract

Indonesia is one of the largest wheat importer. Wheat is consumed by most of Indonesian. Nowadays, the government is trying to find alternative material to substitute wheat with local material named cassava. Cassava is chosen because it has good potential to be developed in Indonesia. Native starch requires long time in reacting and cooking. Hence, the native starch with high purity can be readily modified by physical, chemical and enzyme process to many diversified products to improve the starch functionality and, consequently, encourage more industrial application. On this research, cassava starch modification is produced by combination lactic acid hydrolysis and oxidation using hydrogen peroxide. The results of this research are expected to be a food innovation in small and medium industries.The conclusion that we get is combination lactic acid hydrolysis and oxidation using hydrogen peroxide can increase the expansion of starch. The highest values for the sum of carbonyl dan carboxyl occured at pH 5, hydrogen peroxide concentration 2 %, temperature 40oC, and baking expansion 3,03 cm3/gr. The condition of oxidation that presented the carbonyl and carboxyl content of starch similar to the sun-dried cassava starch. The oxidation with H2O2 provides after hydrolisis cassava starch and produces more homogenous product.  Optimal composition of the use of tapioca starch modification bread is 25% of modified tapioca and 75% of wheat flour which has baking expansion 3,03 cm3/gr.
KONVERSI ASAM SIANIDA MENJADI PROTEIN DALAM TEPUNG UBI KAYU DENGAN FERMENTASI MENGGUNAKAN Rhizopus oligosporus Ardhianto, Ferry Nanda; Pawitra, Mayang Gitta; Sumardiono, Siswo
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 2, Tahun 2013
Publisher : JURNAL TEKNOLOGI KIMIA DAN INDUSTRI

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Abstract

Tepung ubi kayu merupakan salah satu alternatif tepung yang dewasa ini sering ditemukan di pasaran. Tepung ubi kayu adalah hasil fermentasi dengan bahan baku ubi kayu yang diolah lebih lanjut menjadi tepung. Namun, tepung ubi kayu umumnya mempunyai residu glukosa siaongenik yang tinggi yaitu sebesar 62 mg (Adindu, M.N, 2003) yang memiliki kecenderungan sebagai racun. Pada penelitian ini, sianida terikat dikurangi kadarnya dengan mengkonversikannya menjadi protein dengan bantuan kapang Rhizopus oligosporus. Sedangkan sianida terlarut di hilangkan dengan bantuan perendaman dengan larutan  garam serta larutan buffer. Selain itu, larutan buffer juga mengontrol pH menjadi kisaran netral, karena pada range ini sianida terikat menjadi lebih mudah untuk terkonversi. Tujuan penelitian ini adalah untuk mengetahui seberapa besar pengaruh perlakuan kombinasi perendaman dengan garam, perendaman dengan larutan buffer serta fermentasi dengan Rhizopus oligosprus terhadap kadar asam sianida dan kadar protein yang tersisa di dalam tepung ubi kayu. Variabel yang dipelajari antara lain %berat Rhizopus oligosporus, lama waktu fermentasi (12 jam sampai 72 jam) dan perbedaan bentuk ubi kayu saat fermentasi yaitu chips dan parutan. Dari penelitian didapat hasil bawah kadar sianida terendah diperoleh dari fermentasi selama 72 jam pada media ubi kayu parut. Sedangkan kadar protein tertinggi diperoleh dari fermentasi dengan media ubi kayu chips.
ORGANIC FERTILIZER PRODUCTION FROM CATTLE WASTE VERMICOMPOSTING ASSISTED BY LUMBRICUS RUBELLUS Sumardiono, Siswo; Murwono, R.P. Djoko
International Journal of Science and Engineering Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12777/ijse.2.1.9-12

Abstract

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
PENGERINGAN GABAH DENGAN MENGGUNAKAN PENGERING RESIRKULASI KONTINYU TIPE KONVEYOR PNEUMATIK Gunawan, Ivan Aditya; Majid, Aulia Rahman; Sumardiono, Siswo
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : JURNAL TEKNOLOGI KIMIA DAN INDUSTRI

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Abstract

Rice is one of the most important food commodities in the world. So we need to handle it seriously to reduce loss due to improper post-harvest handling. One of the post-harvest handling that noteworthy is the paddy grain drying process. Paddy grain drying process by conventional methods are often encounter many obstacles and no longer relevant to use. Therefore, required an innovative drying tool as an alternative to paddy grain drying.Recirculating paddy grain dryers with pneumatic conveyor could be an alternative, because it has several advantages that good quality dried grain and uniform, and easy to perform control during the drying process. The purpose of this study was to determine the effect of temperature and velocity of pneumatic air to the drying rate. The variables studied in this research isthe velocity of pneumatic airflow, and temperature of drying air. From the research we got that it will be running effectively at a temperature of 60 ° C and pneumatic air velocity of 20 m / s.
MODIFIKASI UBI KAYU DENGAN PROSES FERMENTASI MENGGUNAKAN STARTER Lactobacillus casei UNTUK PRODUK PANGAN Darmawan, Muchlis Riki; Andreas, Patrick; Jos, Bakti; Sumardiono, Siswo
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : JURNAL TEKNOLOGI KIMIA DAN INDUSTRI

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Abstract

Modification of cassava flour(MOCAF) is fermented cassava flour biomass with the help of microorganisms. Modification of cassava flour has a protein content and properties of the physicochemical better than regular cassava flour (without fermenting). Manufacture of modified cassava flour through several stages, namely the preparation of cassava (peeling, washing and cutting), fermentation, drying and the process of conversion chips dried into flour. Modified cassava flour can be produced by fermentation using a wide variety of microorganisms such as the culture of the Lactobacillus casei group of lactic acid.This research aims to know the influence of the concentration of a starter, a thick piece of cassava chips and the addition of nutrients to increased levels of protein as well as the changing nature of the resulting physicochemical. Fermentation is carried out using lactic acid cultures of Lactobacillus casei starter with a concentration of 1%, 3%, and 5% V and nutrients used is ammonium hydrogen phosphate 5% w. In the fermentation process used pieces of 2 mm thickness of chips, 4 mm and 6 mm.The fermentation process is carried out for 72 hours, with the room temperature. From the results obtained: improvement of the highest protein of 3.68% in 2 mm, 5% V variable,% solubility best of 1.63% at 2 mm, 5% V variable, swelling power best of 17.8% in 2 mm, 1% V variable,% carboxylic 0.4% on the largest variables 2 mm ,5% the best tensile strength in noodle products of 0,138 N/mm2 with ratio of 10% MOCAF and 90% of the flour, and pilus expand power of 261,71% on 5% V variable.
Biogas production from bioethanol waste: the effect of pH and urea addition to biogas production rate Budiyono, Budiyono; Syaichurrozi, Iqbal; Sumardiono, Siswo
Waste Technology Vol 1, No 1 (2013)
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463.532 KB) | DOI: 10.12777/wastech.1.1.1-5

Abstract

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
The effect of pH and operation mode for COD removal of slaughterhouse wastewater with Anaerobic Batch Reactor (ABR) Dyan, Maria Octoviane; Putra, Gita Permana; Budiyono, Budiyono; Sumardiono, Siswo; Kusworo, Tutuk Djoko
Waste Technology Vol 3, No 1 (2015)
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.332 KB) | DOI: 10.12777/wastech.3.1.7-13

Abstract

Disposal of industrial wastes in large quantities was not in accordance with todays standards of waste into environmental issues that must be overcome with proper treatment. Similarly, the abattoir wastewater that contains too high organic compounds and suspended solids. The amount of liquid waste disposal Slaughterhouse (SW) with high volume also causes pollution. The research aim to resolve this problem by lowering the levels of BOD-COD to comply with effluent quality standard. Anaerobic process is the right process for slaughterhouse wastewater treatment because of high content of organic compounds that can be utilized by anaerobic bacteria as a growth medium. Some research has been conducted among abattoir wastewater treatment using anaerobic reactors such as ABR, UASB and ASBR. Our research focuses on the search for the optimum results decline effluent COD levels to match the quality standards limbah and cow rumen fluid with biodigester ABR (Anaerobic Batch Reactor). The variables used were PH of 6, 7, and 8, as well as the concentration ratio of COD: N is 400:7; 450:7, and 500:7. COD value is set by the addition of N derived from urea [CO(NH2) 2]. COD levels will be measured daily by water displacement technique. The research’s result for 20 days seen that optimum PH for biogas production was PH 7,719 ml. The optimum PH for COD removal is PH 6, 72.39 %. The operation mode COD:N for biogas production and COD removal is 500:7, with the production value is 601 ml and COD removal value is 63.85 %. The research’s conclusion, the PH optimum for biogas production was PH 7, then the optimum PH for COD removal is PH 6. The optimum operation mode COD:N for biogas production and COD removal was 500:7