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All Journal Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development METANA JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Waste Technology World Chemical Engineering Journal 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 : 29 Documents Claim Missing Document

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Physicochemical and Rheological Properties of Sago (MetroxylonSagu) Starch Modified with Lactic Acid Hydrolysis and UV Rotary Drying Siswo Sumardiono; Rizki B Rakhmawati; Isti Pudjihastuti
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Modification of sago starch using acid hydrolysis will change some physicochemical and rheological properties. Sago is easy to grow in tropical areas of coastal areas, many found in eastern Indonesia has a simple ergonomic terms. Ingredients of sago starch is consist of 20-30% amylose and 70-80% amylopectin which make sago starch difficult to dissolve in cold water, easy to gelatinize, high viscosity, hard and not expands in baking process. This study will analyse modified sago using lactic acid hydrolysis method and use UV rotary drying for 20 minutes. The properties of modified sago starch were observed i.e. pH, density, solubility, swelling power, and baking expansion. Time variables hydrolysis is 10; 15; 20; 25; and 30 minutes with a rotation speed of 8 rpm at room temperature. The results showed that the solubility, swelling power and baking expansion was increase. The density results showed that the longer acid hydrolysis time can make the smaller in the density. Solubility and swelling power showed increasing significantly compared to native sago starch. Modification by using UV light changes significantly the properties characteristics of product.

Biogas Production from Solid Jamu Waste Production Traditional with Anaerobic Process Liquid State – Anaerobic Digestion (LS - AD) Method Siswo Sumardiono; Bakti Jos; Abdullah Farhan; Nearya Sondang; Heri Cahyono
Waste Technology Vol 10, No 2 (2022)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/10.2.50-57

Biogas is a flammable gas produced from the fermentation process of organic materials by anaerobic bacteria. The principle of making biogas is the anaerobic decomposition of organic matter (closed from free air) to produce gas, mostly methane (CH4) and carbon dioxide (CO2). One source of organic material that can be used as raw material for making biogas is the waste contents of the beef rumen. The anaerobic decomposition process is assisted by a number of microorganisms, especially methane-producing bacteria. The first generation of biogas is biogas produced by food derivatives and the process is still conventional. One of the agricultural wastes that can be developed into biogas is jamu waste. Jamu dregs contain high crude fiber, which is 39.72% of the dry weight. Where crude fiber is thought to help in the fermentation process. This research will examine the effect of time on biogas production with the composition of the raw material for jamu waste, the effect of pre-treatment of C/N ratio on biogas production and the effect of Total Solid Substrate on biogas production. Biogas production is carried out through hydrolysis, acidogenesis and methanogenesis stages. The total solid ratio are set in Liquid State condition with 3, 7, 11 and 15% variant of total solid content and the pretreatment of the nutrient ratio of the substrate C/N 20, 22, 24 and 26. The biogas formation process was carried out for 2 months, with a quantitative test response in the form of biogas volume and CODMn removal per 2 days.

Sustainable Batik Wastewater Treatment using Advanced PVDF/NiFe@SiO2 Nanocomposite Photocatalytic Membrane Kusworo, Tutuk Djoko; Budiyono, Budiyono; Sumardiono, Siswo
Waste Technology Vol 12, No 1 (2024)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/11.2.112-119

The primary concern associated with the Batik industry lies in the presence of pollutant dyes that contribute to environmental contamination. Addressing this issue involves exploring various wastewater treatment methods, with membrane technology being a viable approach. In this study, a photocatalytic material, NiFe@SiO2, synthesized through the sol-gel technique, was incorporated into a PVDF membrane. Characterization results from SEM surface, indicated that the PVDF/NiFe@SiO2 membrane displayed superior characteristics compared to other membranes. The addition of the NiFe@SiO2 photocatalyst increased membrane porosity, hydrophilicity, water absorption capacity, and affinity towards water molecules. The PVDF/NiFe@SiO2 membrane exhibited enhanced performance in terms of permeate flux, pollutant rejection, stability, recyclability, and durability. Notably, the fabricated photocatalytic membrane demonstrated superior antifouling performance and flux recovery capability when operating under UV radiation. The study also delved into the influence of wastewater pretreatment on antifouling membrane performance. The modified membrane successfully reduced fouling levels on the membrane by enhancing FRR from ~70% to ~90%. This insight into how pretreatment affects the antifouling properties of wastewater opens avenues for innovative solutions and enhanced design strategies to improve the efficiency and sustainability of wastewater treatment processes. Future research endeavors could focus on maximizing the potential of the bentonite adsorbent in wastewater pretreatment and exploring the full capabilities of the NiFe@SiO2 photocatalyst in enhancing the photocatalytic and antifouling performance of the membrane.

Triple Batch Digesters in Series Method to Analyze Biogas Potential from Bioethanol Vinasse Syaichurrozi, Iqbal; Budiyono, Budiyono; Sumardiono, Siswo
World Chemical Engineering Journal VOLUME 1 NO. 1 JUNE 2015
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i1.198

The purpose of this study was to investigate biogas production from bioethanol vinasse using the simple method which was triple batch digester in series mode. Three digesters (A, B, C) were used in laboratory scale and carried out in 30 days respectively. The fresh rumen was added in substrates before that were put into each digester (A, B, C). Ratio of COD/N in substrat was adjusted in variation of 1436/7, 400/7, 500/7, 600/7, 700/7. The results showed that in digester A, biogas was produced in large amount a first time of fermentation. In digester B, biogas generated was less than that in digester A. Meanwhile, in digester C, biogas was not produced again. Ratio of 500/7 and 600/7 generated the most biogas volume which was 9,322 and 9,168 mL. Keywords: Bioethanol, Biogas, Series Method, Triple Batch, Vinasse,

The Effect of Solid-State Anaerobic Disgestion (Ss-Ad) and Liquid Anaerobic Disgestion (L-Ad) Method in Biogas Production of Rice Husk Budiyono, Budiyono; Sumardiono, Siswo; Fofana, Fadillah Fathir Mahmud; Fauzi, Ihwan; Hadiyarto, Agus
Journal of Vocational Studies on Applied Research Volume 1, Issue 1, Year 2019 (April 2019)
Publisher : Vocational College of Universitas Diponegoro

Rice husk is one of the agricultural waste from rice crop residue which has high potential to be processed into biogas. The purpose of this research is to study the effect of solid state anaerobic digestion and liquid anaerobic digestion on biogas production from rice husk waste. The anaerobic digestion laboratory scale used in this experiment is operated in a batch system and at room temperature. This method is added with chemical and biological pretreatment that was NaOH and microbial consortium. Total solid (TS) was varied from 5%, 7%, 9%, 11% which is L-AD and 17%, 19%, 21%, 23% are SS-AD. Biogas results were measured using the water displacement method every two days to determine daily production. The results showed that with the addition of NaOH the total volume of biogas obtained by L-AD method (TS 9%) and SS-AD (TS 23%) were 1254 ml and 1397 ml. Production of biogas per unit of TS for L-AD method is 46,44 ml / grTS and for SS-AD is 20,246 ml / grts, while biogas production per reactor volume unit for L-AD method is 6,26 ml / ml reactor and for SS-AD method is 4.64 ml / ml reactor. The kinetics constant of biogas production with L-AD method obtained A, U, and λ respectively were 50,53 ml / grTS, 1.23ml / grTS.day, 11,71 day, while for SS-AD method obtained A, U , and λ respectively 21.07 ml / grTS, 0.6 ml / grTS.day, 6.2 days.

Optimisation of Tapioca Oxidative Reaction by Ozone Treatment: Effect of pH, Process Time and Temperature Sumardiono, Siswo; Pudjihastuti, Isti; Supriyo, Edy; Siswanto, Anggun Puspitarini
Journal of Vocational Studies on Applied Research Volume 2, Issue 1, Year 2020 (April 2020)
Publisher : Vocational College of Universitas Diponegoro

Modification of cassava starch was produced by oxidation using ozone treatment. The oxidized starch is used in the paper processing in the pulp and paper industries. The aim of this research was to determine the effect of reaction conditions (pH and temperature) in produced oxidized starch. The oxidative reaction of cassava starch was using ozone as an oxidator while the operating condition was at temperatures of 30, 35, 40 and 45 oC in atmospheric pressure. The fixed variables were weight of cassava starch 80 grams, and volume of aquadest 200 ml. The change variables are reaction time (15, 30, 45 and 60 minutes) and pH solution (6, 7, 8 and 9). The product of oxidized starch was analyzed for carboxyl group according to JEFA method, swelling power according to Leach method and solubility according to Kainuma method. The result of this research shows with an increasing of pH reaction and reaction time, the carboxyl group and solubility increased, but swelling power decreased. The best condition was obtained at the pH of 9 with 60 minutes of reaction time.

Physico-Chemical Properties of Calcium-Fortified Analog Rice from Composite Flour (Cassava, Corn, and Snakehead Fish) for Osteoporosis Prevention Sumardiono, Siswo; Pudjihastuti, Isti; Supriyo, Edy; Amalia, Rizka
Journal of Vocational Studies on Applied Research Volume 2, Issue 2, Year 2020 (October 2020)
Publisher : Vocational College of Universitas Diponegoro

In this study, composite flour made from cassava and corn flour were processed for producing analog rice. To meet the calcium needs for the elderly andto optimize the potential of cassava, corn, and snakehead fish, the analog rice will be fortified with calcium from cork fish. The aim of this work are to study the effect of composite flour composition and the extruxtion temperature on the physico-chemical properties of calcium-fortified analog rice. The parameter process studied were mocaf flour:snakehead fish flour (MF/SFF) mass ratio (100:0; 97:3; 94 6; 91:9; and 88:12) and extrusion temperature ranging from 50oC, 70oC, and 90oC. The physico-chemical properties including bulk density, cooking time, proximate, calcium levels and its organoleptic were analyzed. The results showed that at 91:9 MF/SFF mass ratio and the extrusion temperature at 70oC obtain the best effect on the nutrient content of analog rice which contain 14.34% of water, 0.85% of ash, 71.829% of carbohydrate, 11.236% of protein, 1.12% of fat , 1,113 ppm of calcium, and 2.427% of dietary fibre.

The Effect of Composite Flour Ratio (Cassava, Gembili, Koro Pedang, and Corn) and Extrusion Temperature on Analog Rice Production Sumardiono, Siswo; Novitasari, Arsy; Awaliyah, Fiky Zakiyatul; Meganingtyas, Wahyudita
Journal of Vocational Studies on Applied Research Volume 5, Issue 1, Year 2023 (April 2023)
Publisher : Vocational College of Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jvsar.v5i1.17610

The growing population affects an increasing number of Indonesian people, influencing their rice consumption and encouraging Indonesia to import rice. One of the alternatives is to use raw materials such as potential non-rice tubers. In this study, raw material composite flour was made from cassava (Manihot esculenta), gembili (Dioscorea esculenta), koro pedang (Canavalia ensiformis), and corn (Zea mays), which is the basic ingredient of rice maker analog. This research aimed to examine the influence of the raw material composition on the value of nutrients, the physical-chemical properties of analog rice compared to a rice paddy, and the best temperature of analog rice using organoleptic tests. The process of producing analog rice consists of several stages of research, including the manufacturing of composite flour, the cooking of dough with composite flour, the production of analog rice, and the drying of analog rice. Based on the results, samples of 5 (60% cassava flour, 5% gembili flour, 10% koro pedang, and 25% corn flour) as an analog of rice with the best formulations in various compositions. Based on a proximate analysis of the effect of temperature, a temperature of 75 °C is the optimum temperature for the extrusion process. The results of the physical analysis of the best analog rice in this study have a density of 0.46 g/mL, water absorption of 60.52%, and a cooking time is 46 minutes. The analog rice has the same texture, aroma, and appearance as rice in general, although the rice from the analog composite flour tends to have a savory flavor arising from koro pedang. According to the results of this study, the analog rice could be used as a substitute to lessen dependence on paddy rice.

Adsorption Photocatalytic Removal of Rhodamine B using Dodecyl Dimethyl Betaine (BS12) Intercalated Silver Tetratungstate-Bentonite composites: Effect of Ag and Surfactant Loading, pH, and its Subsequent Economic Feasibility Sumardiono, Siswo; Setiawan, Fajar Kasih; Jos, Bakti; Cahyono, Heri
Reaktor Volume 25 No.1 April 2025
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.25.1.%p

The potential of silver tetratungstate-doped bentonite intercalated with zwitterionic surfactant for removing Rhodamine B (RhB) was evaluated by comparing three composites, namely, AB (acid-activated bentonite), AB impregnated with Ag8W4O16 photocatalyst (Ag@AB), and Ag@AB intercalated with dodecyl dimethyl betaine (BS12) surfactant (Ag@OAB) with respect to their photocatalytic adsorption performance. The AB composite was prepared by treating natural bentonite with hydrochloric acid (HCl). Next, Ag@AB was synthesized by wet impregnation of Ag₈W₄O₁₆ onto AB. Lastly, the Ag@OAB was formed by intercalating the BS12 surfactant onto the Ag@AB composite. The morphology of the composite structures was characterized using Scanning Electron Microscopy (SEM). The addition of 4% Ag (w/w) tetratungstate W4O16 and 50% CEC BS12 to AB produced RhB removal percentages of 66% and 59%, respectively, compared to 65% for AB. The maximum removal percentage was achieved at pH 4 for the AB, Ag@AB, and Ag@OAB composites with RhB removal percentages of 67%, 71%, and 44%, respectively. The AB composite showed the highest regenerative ability compared to Ag@AB and Ag@OAB, with AB maintaining RhB removal at 70% after five regeneration cycles, while Ag@AB and Ag@OAB only reached four and three regeneration cycles. The total production cost of AB is fourteen to sixteen times lower than that of Ag@AB and Ag@OAB composites. In summary, the impregnation of the Ag₈W₄O₁₆ photocatalyst onto AB, resulting in the Ag@AB composite, increases the RhB removal efficiency compared to pristine AB. In contrast, the intercalation of the BS12 surfactant in Ag@OAB composite led to a decrease in RhB removal efficiency, resulting in the lowest performance among the three composites.

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

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