cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kab. sleman,
Daerah istimewa yogyakarta
INDONESIA
ASEAN Journal of Systems Engineering
Published by Universitas Gadjah Mada
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
ASEAN Journal of Systems Engineering (AJSE) is published by Master Program of Systems Engineering, Faculty of Engineering, Universitas Gadjah Mada as a mean for publishing scientific works in form of research papers, literature study, or scientific review on published articles, about systems engineering especially in the field of energy, industry and environment. The journal is published twice a year (June and December), in both print and online versions.
Arjuna Subject : -
Articles 78 Documents
 1   2   3   4   5 
PENGARUH LEBAR SUDU TERHADAP KINERJA TURBIN VORTEKS Yusuf Randabunga; Adhy Kurniawan; Suryo Darmo
ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Vortex turbine is the one of turbines which meets those criteria. This turbine utilizes kinetic energy of vortex water and converts it into a shaft power. The objectives of this research were to obtain the torque that could be generated from the vortex  turbine by varying the width of turbine blades and to know  the output  power also the optimum efficiency obtained from this variation. This research was conducted by  using vortex pool in a laboratory scale with a diameter of 108 cm and 6 turbine blades on permanent rotation at 50 rpm, 60 rpm, and 70 rpm. Turbine blades were made from flat rectangular steel with a length of 40 cm sized 1/6, 2/6, 3/6, 4/6 and 5/6 times to radius of vortex pool.The results of the research showed the torque as 1.40 Nm at rotation is 50 rpm. The maximum power is obtained from blade with width of 3/6 times  radius of the pool, that is  8.60 Watts at head 0.362 m and discharge 11.83  l/s or  0.01183 m3/s at rotaion shaft is 70 rpm. This experiment also generated and turbine efficiency of 16.46% at rotation of shaft is 70 rpm.
UJI EKSPERIMENTAL SEMEN PAPAN PARTIKEL BERBAHAN BAKU LIMBAH FLY ASH BATU APUNG SEBAGAI BAHAN PEREDAM SUARA Apip Amrullah
ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

By the development in technology especially in architecture and industry with its noise activity, encourage us to do some efforts to solve noise problem. One might done is utilize pumice as noise absorber. Raw material used in this reaserch is pumice ash. Mixing compotsition variation between cement composition, pumice ash as sand subtitution, with comparison mixing composition at 1 : 6 (1 cemen : 6 ash), 1 : 8 (1 cement : 8 ash :), 1 : 10 (1 cement : 10 ash). Sound absorbtion coefisien are measured by standing wave tube apparatus. The result of the research indicates that mixing composition affects the sound absorbtion coefisien. Reaserch shows taht 1 : 6, 1 :8 and 1 : 10 sound absorbtion coefisien which is 0.96, 0,86 and 0.89 in 8000 Hz frequency. Comparison at 1 : 6, 1 : 8 and 1 : 10 (cement : sand ) has the best absorbtion coefisien at comparation 1 : 10 which is 0.98 with 4000 Hz frequency (middle level frequency).
PEMANFAATAN LIMBAH CAIR INDUSTRI AREN DI DUKUH BENDO, DESA DALEMAN, KEC. TULUNG, KAB. KLATEN SEBAGAI PUPUK ORGANIK CAIR (POC) DENGAN METODE PENGOLAHAN AEROBIK Jovita Irene Pongoh; Sarto -; Muhammad Sulaiman
ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

These days, a lot of solid and liquid waste produced from aren powder indutry, and one of the area for this industry located in Bendo Subvillage, Klaten District, Central Java. The liquid waste is the unwanted product from of the aren powder during the screening and precipitation process.. The liquid waste produced by the industry at Dukuh Bendo is containing  high of BOD and COD and this is became an environmental disaster as most of the liquid waste did not through the waste treatment process, and sent directly to water stream so there is a need to overcome or minimize this whole problem, and the making of liquid organic fertilizer from the liquid waste of this industry is one of the solution. The usage of liquid organic fertilizer also can reduce the usage of chemical fertilizer and also can help repair the soil condition and minimize the environmental destruction caused by liquid waste from this industry.During the research, for the liquid waste treatment aerobic proces in the aeration pond is used with the addition of bacteria and varoius dilution composition; VAR1 the composition between liquid waste and water 50:50 with bacteria added, VAR2 the composition between liquid waste and water 80:20 with bacteria added, VAR3 the composition 100% liquid waste with bacteria added, VAR4 100% liquid waste with no bacteria added. From the laboratory test found that the liquid waste from aren industry contains 686 mg/l BOD and 5800 mg/l COD. The research was done in some stages; preliminary test to understand the characteristic of the liquid waste from aren powder industry, specially the BOD and COD levels,treatment in the aeration pond, and the result from the process ( liquid organic fertilizer) and it tested to cornstalk in this research and the height and the leaves growth are recordedThe result from aeration process with bacteria added are : the BOD with the efeective retention time for VAR2 is in day 4, with BOD level at 3.2 mg/l which is 98.8% reduced from the original level ( 686 mg/l). The COD with effective retention time for VAR2 is in day 4 with COD  level at 120 mg/l which is 96.98% reduced from the original level ( 5800 mg/l. The maximum nitrogen level is in day 5 at 0.07629%, phospor level at 0.0199% and potassium level at 0.0169%the positif growth of the cornstalk recorded during the period of the time showing that the nutrient absorbed properly.
HYBRID POWER SYSTEM MODELING FOR ELECTRICITY SYSTEM IN SUMBAWA DISTRICT (HYBRID POWER SYSTEM MODELING) sumartono -; Ahmad Agus Setiawan; Bertha Maya Sopha
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1190.425 KB)

Abstract

Include the provision of energy management, utilization and enterprise shall be done justice, sustainability and so can not give optimal benefits for the greater welfare of the people. Sumbawa has a variety of potential sources of renewable energy such as; water energy, solar energy, wind energy, geothermal energy and biomass. From a variety of renewable energy potential can be made a model of hybrid power system design for the electrical system in Sumbawa is based on renewable energy in the region.             The purpose of this study was to determine the magnitude of the potential of renewable energy for power generation, knowing large share of renewable energy to the electrical energy needs and design a model of hybrid power system for electrical system in Sumbawa by using HOMER (Hybrid Optimisation Model for Electric Renewables).             The results of this study recommend a model of hybrid power system that is optimum for a total net present cost (NPC) US $ 144,954,400, operating cost of US $ 1,801,515 / year, the cost of electric (COE) US $ 0.090 / kWh of excess electricity and 99,072,760 (kWh / year) and the contribution of each component of the capacity modeling results are; PV Array 4.4%; wind turbine 20.3%; hydro turbine 74.4%; biomass generator 0.8%; G1 and G2 diesel generator as a back-up system by 0.1%. The results of model simulations also show that the model of hybrid power system that is recommended to have much lower levels of emissions than conventional systems where there is a reduction in the level of emissions into the environment by 99.75%. Thus the hybrid power system for electrical system in Sumbawa considered feasible as an alternative solution to meet the electrical energy needs in Sumbawa
GREYWATER MANAGEMENT OF PANTAI BARU PANDANSIMO KABUPATEN BANTUL FOR CREATING ZERO WASTE ZONE Agung Eka Saputra; Arif Kusumawanto; Siti Syamsiah
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.807 KB)

Abstract

The beach which is experiencing the current developments in the districts of Bantul is Pantai Baru Pandansimo. This area is an area that has been declared by the Bantul regent as zero waste zone. The development of Pantai Baru Pandansimo will give some impact. Thing that can arises is the environmental pollution from trading activity at restaurants around Pantai Baru Pandansimo. Every restaurant produce washing waste (greywater) had only absorbed into the ground or yard restaurants because do not have access to treatment plant.          The main objective of this research is plan alternative system management for greywater that corresponding to Pantai Baru Pandansimo area so can creating sustainable zero waste zone. The results of the analysis obtained that alternative management unit greywater that appropriate and can be used at Pantai Baru Pandansimo is subsurface constructed wetland  because easy to understand society and easy maintenance. Application of processing units that had been planned to reduce the BOD load in the amount of 41% depending on the extent of the unit to be used and reduce greywater is discharged into the environment 60% -80% of waste. From calculations obtained, wetland unit dimensions used by the average discharge within one week of 276.25 liters / day is 1 x 0.5 x 0.8 m3 with detention time (td) 0,5 day. Wetland that is used can be used as a park around the culinary of Pantai Baru Pandansimo and can encourage people to be more aware of the concept of zero waste.
THE DETERMINATION OF LANDFILL (TPA) ALTERNATIVE LOCATION IN WEST TULANG BAWANG DISTRICT OF LAMPUNG PROVINCE Desy Renisita; Sunjoto Sunjoto; Sarto Sarto
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (746.233 KB)

Abstract

West Tulang Bawang is one of the new regencies in Indonesia which was a new expanded area that continues to grow. It is followed by population growth rates resulting in increased volume of waste. The landfill (TPA) is an important component of any waste management system. A good waste has several characteristics. To ensure the appropriate selected land, a systematic process must be developed and followed.The study of the selection of the landfill (TPA) is aimed at finding feasible area as the location of the landfill, so that the allocation of the new landfill will be in accordance with local policies in regional spatial planning and meet the criteria of ISO No. 19-3241-1994. The role of Geographic Information System (GIS) in the management of solid waste is important because many aspects of planning and operations are highly dependent on the spatial data. The landfill selection process consists of three stages of filtering, i.e., the feasibility of the environment by utilizing Geographic Information System (GIS) to map the location of viable landfill, regional filtering phase based on the regional policy and the elimination filtering using SNI 19-3241-1994.The results of the study showed that with an estimated population in 2033 which is 330 807 people, the amount of waste that will go to the landfill through the 3R principle reached 309.36 m3 / day or 61.87 tons / day so that the area of the required land for the sanitary landfill pattern with a 20 year planning is 17.70 Ha. The alternative location was selected by with a priority level which is located on the Panaragan Jaya Utama of Central Tulang Bawang sub-district with a land of 99.68 hectares, Tulang Bawang village districts Panaragan Central with a land area of 136.26 ha and the Kagungan Ratu village of Tulang Bawang sub-district of 74 , 65 Ha.
STUDY OF CHARACTERISTICS OF GASIFICATION PROCESS OF VARIOUS BIOMASS IN A DOWNDRAFT GASIFIER Agus Aktawan; Agus Prasetya; Wahyu Wilopo
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (492.264 KB)

Abstract

Biomass gasification is an endothermic reaction process for converting biomass into syngas, occurs at high temperatures with limited oxygen. Knowing the temperature profile of biomass gasification wood charcoal, coconut shell charcoal and coconut shell, rice husk and woodchip and seek optimal results from gasification of biomass are the purpose of the research.The equipment in this research consisted of; gasifier as the main tool with 4 temperature sensors, two cyclones for tar and dust separator, cooler to refrigerate and filter containing biomass as a catcher of dust and tar from the syngas. Research start by ignite the biomass in the gasifier, the air flows by blower and the syngas came out after the filter. Research variabel are variation of biomass types mentioned above and variation of shell and coconut shell charcoal mixing. Observations were made up until the biomass in the gasifier did not produce syngas, characterized by gas results could not burn.The results of the temperature profile of gasification of various types of biomass shows that the syngas appeared in the early minutes (2 minutes until the 5th) on the gasification, such as gasification coconut shell, woodchip, rice husk. Syngas of coconut shell charcoal is 2,825% w/w of biomass and can burn for 19 minutes and resulted in 1,92% ash and 29,57% charcoal. Syngas of mixture 25% shell and 75% coconut shell charcoal is 5,013% w/w of biomass and can burn for 30 minutes and resulted in 1,61% ash and 5,1% charcoal.
INFLUENCE OF EFFECTIVE SIZE AND LEVEL OF SUPERNATANT LAYER IN SLOW SAND FILTER PERFORMANCE Agustina Kiky Anggraini; Stephan Fuchs; Adriana Silva
ASEAN Journal of Systems Engineering Vol 2, No 2 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (428.956 KB)

Abstract

Slow sand filtration has been admitted as an old method of water treatment and has been widely used in the world. This type of sand filter is prominent in its simplicity, low cost, and effectiveness. The term effectiveness refers to the performance on removing particulate matter and microorganisms. There are some significant factors should be considered in the system of slow sand filtration, such as grain size distribution of media, sand type, bed depth, operation mode of filter, and filtration rate. This study focuses on the influence of different effective size of media and operation mode in slow sand filtration especially on removing turbidity. Grain size distribution is represented by the effective size (d10) and uniformity coefficient (Cu). In regard to the operation mode, both sizes were operated under intermittent operation mode and were compared in two different level of supernatant layer: decreasing level and constant level. Laboratory scale experiments were conducted using four filter columns. Two filter columns were filled up with Rhein sand in different effective size of d10 0.075 mm and d10 0.50 mm. Uniformity coefficient Cu 2.5 and curvature coefficient Cc 1 were the same for both d10. Every column was fed with the same concentration of artificial raw water. The artificial raw water was created from Heilerde (clay from Germany) which passed 0.063 mm sieve opening mixed with tap water. Fine grain size tends to be easier to be controlled in regard to filtration rate, and vice versa for the coarse grain size. Surprisingly, the coarse grain size was able to remove turbidity as good as the fine grain size. Permeability of column was also tested and it decreased along with the addition of Heilerde.
MAPPING POTENTIAL FOR WIND ENERGY IN COASTAL MARINE SENGGIGI FOR RENEWABLE ENERGY DEVELOPMENT SUPPORT Muliadi -; Eliza Ruwaidah; Akhmad Asyari
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (336.11 KB)

Abstract

His form of energy self-sufficient villages throughout Indonesia is the government's goal in the field of energy. Utilization of wind energy as a renewable energy source is an attempt to answer the problem for change and the natural environment is also one of the conservation of conventional energy sources. The purpose of this research study is to get the wind potential in accordance with the site characteristics such as speed and direction as a basis for planning SKEA. Potential awakened power of the wind potential and value of the benefits to be derived based on economic analysis if the potential energy is utilized for the generation of renewable energy on the grid system. The method used is the method of distribution. The results of the analysis of wind energy potential in Selaparang in 2011 until 2013, increased in 2011 the potential energy of 278, 5 KW KW rose to 562.5 in 2012 and in 2013 to 522, 4 KW wind speed has increased so the potential for increased power. Increased wind speed at the beginning of the year and the end of the rainy season occurred. The magnitude of the potential of wind energy can be used for supplying the electricity needs of the population about the number of households 500. The potential of wind energy in Kediri in 2011 until 2013, the image can be seen that the energy per year decline in 2011 the potential energy of 1751.33 KW dropped to 636 , 96 KW in 2012 and declined in 2013 to 44.954 KW wind speed so that the lower the potential for wind power down. Economic analysis produces BCR value of 1.4. Wind speed in Kediri greater than in Senggigi same year, but increased wind speeds in Senggigi and in Kediri decreased.
PENGARUH JENIS ARANG AKTIF AMPAS TEBU, TATAL KAYU DAN TEMPURUNG KELAPA TERHADAP KEMAMPUAN PENJERAPAN WARNA AIR SUNGAI SAMBAS Winda Apriani; Indra Perdana; Sri Puji Saraswati
ASEAN Journal of Systems Engineering Vol 2, No 2 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (246.297 KB)

Abstract

The availability of clean water still poses problems in Indonesia. The need of clean water for Sambas City people still depends on river water. This river water comes from Sambas River which has bright yellow color (73.6 TCU), exceeding the allowed maximum level for clean water in accordance with the Regulation of Health Affairs No.416/MEN.KES/PER/IX/1990, which is 50 TCU, with low turbidity (23.3 TCU) and low pH (4.34). The characteristics of this river water indicate that the water color of Sambas River is true color. Level of this type of water color can be degraded by adsorption process using activated charcoal. It is easy to find raw materials of activated charcoal from waste sources containing carbon in Indonesia, especially West Kalimantan, such as bagasse, wood chips and coconut shell. Therefore, this research was conducted to identify the influence of activated charcoal types of bagasse, wood chips and coconut shell which are used as adsorbent to adsorp the color of Sambas river water and to identify the optimum dosage and duration of the process.Activated charcoal was made of bagasse, wood chip and coconut shell through pyrolysis process at a temperature of 5000C for 3.5 hours followed by chemical activation process using H3PO4 5% for 24 hours. The water was from Sambas river, Tanjung Mekar Village, Sambas, West Kalimantan. The adsorption process employed various types of activated charcoal (bagasse, wood chips and coconut shell); dosage (1, 2, 3, 4 and 5%b/v); and contact time (10, 15, 30, 60, 90, 120 and 180 minutes).The results indicated that different types of activated charcoal material in the adsorption process give different color level. The best treatment of batch process with 500 ml of Sambas river water was from the adsorption using activated charcoal of bagasse with an optimum dosage of 2% b/v and optimum contact duration of 90 minutes. It produced water color level between 50.00-52.00 TCU (meeting the standard of the Regulation of Health Affairs No.416/MEN.KES/PER/IX/1990).

Page 3 of 8 | Total Record : 78

 1   2   3   4   5 

Filter by Year

2013 2025


Reset
Filter By Issues
All Issue Vol 9, No 2 (2025): ASEAN Journal of Systems Engineering Vol 9, No 1 (2025): ASEAN Journal of Systems Engineering Vol 6, No 2 (2022): ASEAN Journal of Systems Engineering Vol 6, No 1 (2022): ASEAN Journal of Systems Engineering Vol 5, No 2 (2021): ASEAN Journal of Systems Engineering Vol 5, No 1 (2021): ASEAN Journal of Systems Engineering Vol 4, No 2 (2020): ASEAN Journal of Systems Engineering Vol 4, No 1 (2020): ASEAN Journal of Systems Engineering Vol 3, No 2 (2015): ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering Vol 2, No 2 (2014): ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering Vol 1, No 2 (2013): ASEAN Journal of Systems Engineering Vol 1, No 1 (2013): ASEAN Journal of Systems Engineering More Issue