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Catalytic cracking of polyethylene terephthalate (PET) plastic waste and palm fibre mixtures using Ni-USY zeolite catalyst

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Journal of Physics: Conference Series 2020年第2期1567卷

作者： Nazarudin N Jayanti O Alfernando I G Prabasari Ulyarti R Sarip Chemistry Engineering Study Program Faculty of Engineering Universitas Jambi Indonesia Center of Energy and Nanomaterial Study Universitas Jambi Indonesia Agricultural Product Technology Study Program Faculty of Agricultural Technology Universitas Jambi Indonesia Chemistry Department Faculty of Science University of Malaya Malaysia

This research was carried out to produce fuel (Oil Liquid Poduct/OLP) from catalytic cracking of a mixture of Polyethylene Terephthalate (PET) and fiber waste from palm oil. USY zeolite was previously ion-exchanged by three levels of Ni-metal concentration (1%, 2%, 3%) before used as catalyst in the cacking process. The catalytic cracking was carried out at rasio of sample to catalyst was 6:1, three levels of temperature (400°C, 425°C and 450°C) and three levels of reaction time (10, 20 and 30 minutes).The SEM images and EDX spectra of Ni-USY zeolite catalysts showed that all catalysts were in crystalline form of FAU framework. The highest of OLP percentage, 24.5%, was produced by catalytic cracking at 450°C for 10 minutes using Ni-USY prepared by ion-exchange using 2% concentration of Nickel Nitrate solution.

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Updated Numerical Model of Mataloko Geothermal Field

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IOP Conference Series: Earth and Environmental Science 2021年第1期732卷

作者： Bambang Wahyu Jatmiko Heru Berian Pratama Sutopo Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung 40132 Indonesia PT PLN (Persero) Jalan Trunojoyo Blok M-1 No. 135 Jakarta Indonesia

Data collection and further geoscience studies have been carried out in the Mataloko area at the end of 2019. In general, the results of the study showed significant differences compared to previous studies. Therefore, it is necessary to update the Mataloko geothermal field's numerical model following the latest studies' data and analysis. In this research, numerical modeling will be performed using a TOUGH2 V.2 simulator and graphical interface software. The model will be built and validated at the natural state phase. It is expected that the model can complement existing geoscience studies and can be used by developers in planning field development.

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Physicochemical Characteristics of Artificial Rice from Composite Flour: Modified Cassava Starch, Canavalia ensiformis and Dioscorea esculenta 2

Physicochemical Characteristics of Artificial Rice from Comp...

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2nd International Conference on Energy, Environmental and Information System, ICENIS 2017

作者： Sumardiono, Siswo Pudjihastuti, Isti Handayani, Noer Abyor Kusumayanti, Heny Chemical Engineering Department Faculty of Engineering Diponegoro University Central Java Semarang Indonesia Vocational Program Study of Chemical Engineering Diponegoro University Central Java Semarang Indonesia

Indonesia is the third largest country on the global paddy rice production and also considered as a rice importer. Even, Indonesia has the biggest per capita consumption of paddy rice (140 kg of paddy rice per person per year). Product diversification using local commodities. Artificial rice is potential to be developed as a new value product using different types of grains. It is one of appropriate solutions for reducing imported rice rate. Artificial rice was produced using high nutrition composite flours (modified cassava starch, corn, Canavalian ensiformis, and Dioscorea esculenta). This study consists of three main stages, preparation of composite flour, formulation, and artificial rice production using hot extruder capacity 10 kg/day. The objectives of this studies were to investigate some formulation in compare with commercial paddy rice. Artificial rice has been successfully conducted using prototype of hot extruder with the temperature 95°C. Physical analyses (color and water absorption) were carried out to artificial rice product and commercial paddy rice. Chemical analyses (nutrition and amylose content) of product will be also presented in this study. The best formulation of artificial rice was achieved in 80% modified cassava starch, 10% Canavalian ensiformis, and 10% Dioscorea esculenta, respectively. © 2018 The Authors, published by EDP Sciences.

关键词： Water absorption

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The Need of Catering Food Materials using Lotting Technique

The Need of Catering Food Materials using Lotting Technique

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International Conference on Informatics, engineering, Science and Technology, INCITEST 2018

作者： Robecca, J. Sudrajat, D. Study Program of Industrial Engineering Faculty of Engineering and Computer Science Universitas Komputer Indonesia Jl. Dipatiukur no. 112-116 Bandung Indonesia

The purpose of this study is to Minimize the purchase cost for each food from the catering menu. Therefore, raw material inventory control method is needed to plan arrival schedule, order schedule, and the amount of ordering of each foodstuff. The technique of determining the amount of ordering (lotting technique) used there are three, namely the least unit cost technique, the lot for lot technique and the least total cost technique. The results of this study indicate that the company can Minimize the cost of purchasing food based on lead time, storage time limit, and optimal lotting techniques. Lead time is the period between the order to the delivery time, the storage time limit is how long the best time required for the quality of foodstuffs are maintained, while the lotting technique is the optimal size of order quantity. The lotting technique chosen for each type of food material is different. The cost of purchasing the food consists of the price of the foodstuff, the ordering fee for the type of material and the storage cost for the type of foodstuff. There are 16 types of foodstuffs with the cost of purchasing the smallest raw material with the lot for lot techniques. There are 29 types of foodstuffs with the cost of purchasing the smallest raw materials using the least unit cost techniques. And 10 types of foodstuffs with the least total cost technique as a lotting technique with the purchase of the smallest raw material. Of the 55 types of food raw materials, the company was able to save the cost of purchasing groceries of 33,006,371.75 IDR per month. Of course, in order to apply this planning, the company must provide facilities in order to extend the life of the foodstuff in accordance with predeterMined lead time and to ensure the quality of the foodstuff is guaranteed. © Published under licence by IOP Publishing Ltd.

关键词： Costs

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Effect of papaya gum ratio per solvent volume and sonication time in bio-insecticide production using NaDES solvents with ultrasonic waves

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AIP Conference Proceedings 2020年第1期2255卷

作者： Tania Surya Utami Ahmad Tibrizi Meizka Sungkar Gibranadhi Tenggoro Rita Arbianti Heri Hermansyah 1Bioprocess Engineering Study Program Department of Chemical Engineering Faculty of Engineering Universitas Indonesia UI Campus Depok 16424 Indonesia

As an agricultural country, Indonesia has considerable agricultural potential towards development of the national economy. However, the potential itself must be followed by the improvement quality of the agriculture. Armyworm (Spodoptera sp.) is one of the pests that damages various kinds of plants and leads to harm the agricultural sector. One of the ways to control armyworm pests is to provide organic pesticides (bio-insecticides) which are biodegradable and safe for human health. The papain enzyme is one the enzymes obtained from the gum of papaya which functions as a bio-insecticides. The gum of papaya itself comes from waste papaya skin which its availability is abundant in Indonesia. The method that can be used to get the papain enzyme from papaya's gum is the extraction through the help of ultrasonic waves. Natural Deep Eutectic Solvents (NaDES) was chosen as a solvent because its environmentally friendly, to extract the enzyme papain which later will be made into a bio-insecticides. The sonication time of 10, 20, and 30 minutes and the mass ratio of gum per volume of solvents 20, 40, and 60 mg/mL were varied to obtain the optimum conditions in the extraction process which were seen from the results of protein concentration test, enzymatic activity test, and efficacy test. The result of the study showed that 20 minutes and a concentration of 20 mg/mL were the optimum conditions for the extraction process of the papain enzyme. In addition, the use of NaDES solvents compares to ethanol solvents as commonly used solvents, showed that the extraction results with NaDES solvents were better than the results of ethanol solvents.

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The effect of time cultivation in production of AA and EPA from Aspergillus oryzae with three-stage fermentation strategy

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AIP Conference Proceedings 2020年第1期2230卷

作者： Tania Surya Utami Rita Arbianti Cindyara Nayanda Andi Nuraliyah Anondho Wijanarko 1Bioprocess Engineering Study Program Department of Chemical Engineering Faculty of Engineering Universitas Indonesia UI Campus Depok 16424 Indonesia

Cardiovascular disease is the second biggest killer in Indonesia. The percentage risk of stricken by this disease is so high in community. Which are actually this disease can be prevent with dietary consumes of omega 3 and omega 6 such as AA and EPA. Omega 3 and omega 6 is often found in fish oil. However, the fish availability and the quality of Indonesia’s ocean that tainted with heavy metals can be dangerous and also become the biggest problems of production omega 3 and omega 6 from fish. With the problem above the alternative sources of omega 3 and omega 6 is needed. Whereas the source must be able to produce oil in large number without taking a large amount of land and also economic. In this research, the fermentation of Aspergillus oryzae process with three-stage fermentation strategy with variation of time culture. This fermentation method divided into three stage where the first stage focused in cell propagation and second stage focused in lipid biosynthesis and the last stage for production of AA and EPA. In each stage the medium was design to be specific with the purpose. The time culture variation run in second and third stage. The most optimal cultivation time that run in second stage was 2 days with 17.2% lipid productivity or equal to 0.1341 g, on the other hand the most optimal cultivation time that run in third stage was 1 days with 54.51% Unsaturated fatty acid and 36.73% saturated fatty acid. The composition of unsaturated fatty acids is 29.1% oleic acid, 25.4% linoleic acid, 0.01% AA and 0.01% EPA.

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Stability Analysis and Fault Changes on Wind Turbine Effect in Multi Machine Power System

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IOP Conference Series: Materials Science and engineering 2020年第1期875卷

作者： B A Ashad A Siswanto I C Gunadin Yusran Electrical Engineering Engineering Faculty Hasanuddin University Makassar Indonesia Electrical Engineering Study Program University of 17 Agustus 1945 Cirebon Indonesia

This study presents stability analysis using a new approach to model the disturbances that occur in multi-machine systems connected with wind turbines. Consideration of stability and operability of conventional electric power systems planning and developing facing problems with the integration of installations in wind power plants (WPP) is needed because the current system is connected with renewable energy. This study highlighting the effects of WPP connected to a multi-engine 9 bus system from the effect of changes in disturbances occurring on several buses when operating. Disruption in multi-machine systems connected with wind turbines can affect system stability. The noise changes from bus to bus in the voltage drop effect on the system bus. The effect of wind turbine when a fault has a small moment of inertia can make the system unstable on the bus. The results of simulations carried out using ETAP to observe system stability have been carried out. The simulation results show that a system disruption that occurs in a multi engine system connected to the wind turbine does not result in a decrease in the bus near the fault then the stability decreases.

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The Effect of Aloe vera Extract Variation in Electrospun Polyvinyl Alcohol (PVA)-Aloe vera-Based Nanofiber Membrane 8

The Effect of Aloe vera Extract Variation in Electrospun Pol...

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8th International Conference on Theoretical and Applied Physics, ICTAP 2018

作者： Hikmawati, D. Rohmadanik, A.R. Putra, A.P. Siswanto Aminatun Physics Study Program Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya61110 Indonesia Biomedical Engineering Study Program Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya61110 Indonesia

Electrospinning technique is a method to produce nanofiber with high potential difference. Several main parameters in the electrospinning process are solution parameter, such as viscosity, surface tension and conductivity. Those parameters affect the morphology of nanofiber membrane produced by the electrospinning process. This study used 10% PVA in aquadest with several Aloe vera concentration (0, 2.5, 5, 7.5 and 10 % w/v). The viscosity of the solution increased when the concentration of the Aloe vera increased. SEM image of the nanofiber membrane showed that the diameter of the nanofiber increased with the increase of the Aloe vera concentration, with the highest diameter of 379.80 nm on the membrane with Aloe vera concentration of 10% w/v. The result of DSC test showed that there were shifts on the glass transition (Tg) and melting point (Tm) value along with the addition of Aloe vera in the PVA solution. This results was also emphasized with the result of FTIR test which showed the shift on the wavenumber absorbance due to the crosslinking between PVA and Aloe vera. The degradation test indicated that the presence of crosslinking could maintain the nanofiber structure, thus the membrane was not easily degraded. © Published under licence by IOP Publishing Ltd.

关键词： Nanofibers

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Shallow-Water Bathymetry Estimation Using Single Band Algorithm and Green Band Algorithm

Shallow-Water Bathymetry Estimation Using Single Band Algori...

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IEEE Control and System Graduate Research Colloquium (ICSGRC)

作者： Nur Syahirah Hashim Wiwin Windupranata Saiful Aman Hj. Sulaiman Centre of Studies for Surveying Science and Geomatics Universiti Teknologi MARA Shah Alam Selangor MALAYSIA Geodesy and Geomatics Engineering Study Program Faculty of Earth Science and Technology Institute Technology of Bandung Indonesia Malaysia Institute of Transport (MITRANS) Universiti Teknologi MARA Shah Alam Selangor MALAYSIA

ISBN: (数字)9781728153131

ISBN: (纸本)9781728153148

The provision of more comprehensive bathymetric data, for not just apply to the modern marine application but also the development of national data infrastructure. This demand has created a series of development in bathymetric data acquisition throughout the year from the lead line, ship-borne sounding, to air-borne Lidar. However, it has pros and cons in each bathymetric data acquisition related to cost, time, manpower and accessibility. The integration idea drives from the successful of Satellite-Derived Bathymetry technique in solving the problem, moreover, this the way to achieve the data with a uniform resolution in acceptable time and cost. Therefore, this study conducted to generate bathymetric mapping at '`Pantai Tok Jembal'' using Single Band Algorithm (SBA) for two visible bands (Blue and Green) and Green Band Algorithm (GBA). Two comparative analysis conducted in this study first is between SBA-Blue and SBA-Green to evaluate the ability of each band to estimate bathymetry at '`Pantai Tok Jembal'' shallow-coastal water area and while second is between SBA-Green and GBA method to evaluate the ability of each statistical approach in computing absolute water depth. Further, the result evaluated using SBES ground truth data. The root mean square error (RMSE) and R-squared (R 2 ) computed between Single Beam Echo Sounding (SBES) data and Satellite-Derived Bathymetry (SBA and GBA), and the result shows that SBA-Green stand out in both analysis; moreover, this study successfully produces 49.69 km 2 area (Extended Area) bathymetric mapping at '`Pantai Tok Jembal'', Terengganu, Malaysia. However, to support marine application and national data infrastructure, it requires more comprehensive bathymetric data which is giving high in accuracy and reliability, further research needs to undertake to fulfil this support.

关键词： Reflectivity Remote sensing Earth Calibration Artificial satellites Meters Sea measurements

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Evaluating the availability of facilities in the elderly park in terms of environmental sustainability

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IOP Conference Series: Materials Science and engineering 2020年第3期830卷

作者： L S Akliyah F D M Solihin Urban and Regional Planning Program Study Faculty of Engineering Universitas Islam Bandung Bandung Indonesia

Bandung City has many thematic parks spread across several districts. One of them is Taman Lansia (Elderly Garden). Although according to Bandung City Government that parks are intended for all age groups, there should be a target for visitors based on different age groups in each park based on the theme. The elderly has physical and psychological limitations that cause the elderly age have special needs that are different from the productive and pre-productive age communities, so special facilities are needed for the elderly in Bandung. Based on observation, existing facilities in Taman Lansia had not been able to cover the elderly needs. So that, the purpose of the study was identifying visitor characteristics and analyzing the facilities needed at Taman Lansia according to the elderly characteristics. The data collection methods were getting observation and interviews. The variables must fulfill criteria for facility that the elderly needs, such as accessibility, security, and convenience. The analysis methods were descriptive analysis. This study indicated that Taman Lansia visitors were dominated by elderly residents. There were several types of facilities that have not been provided in accordance with the characteristics of the elderly such as ramp handrails. The available facilities did not consider the characteristics and needs of the elderly.

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