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ASEAN Journal of Systems Engineering
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Core Subject : 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.
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Articles 42 Documents
THE PERFORMANCE OF JUICER MACHINE ON VEGETABLE MILK PRODUCTION FOR SMALL AND MEDIUM INDUSTRIES Karyani, Uli; Mulyono, Panut; Miasa, I Made
ASEAN Journal of Systems Engineering Vol 3, No 2 (2015): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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Abstract

The purpose of this research is to make juicer machine to produce vegetable milk for small and medium-scale industries, and the machine has been able to be made with a juicer machine dimensions 90 cm X 40 cm X 114 cm. With ½ HP motor power and motor speed 1420 r / min so as to grind soy beans, green beans and corn with a production capacity of each of the milk is on average 15 liters, 12 liters and 12 liters.The first study is to design and create a juicer machine to produce vegetable milk based soy bean, green beans and corn by using some filter size is 60 mesh, 80 mesh and 100 mesh to obtain a best filter size for each type of vegetable milk. And organoleptic test to determine the level of preference for vegetable milk and obtained the most preferred type of vegetable milk is soy milk with a 100 mesh filter.Anti-E.coli test result on vegetable milk as product quality standards, not found any E. coli in each sample tested. While the feasibility of vegetable milk production  using a juicer machine is feasible to use in the business of making the three types of vegetable milk because it can give the advantage of 1.20-fold for each unit of the issued capital, the benefits outweigh the effort of making industrial scale vegetable milk usual household. And in terms of the market, producing vegetable milk is still a promising business seen from vegetable milk organoleptic test average of 60% is still loved and considers it important to consume vegetable milk.
STUDY OF THE USE OF BIOFILTER REACTOR FOR GREYWATER PROCESSING IN THE AREA OF FLOATING SETTLEMENT KELURAHAN MARGASARI KOTA BALIKPAPAN TOWARD THE CONCEPT OF ZERO WASTE Supriyanto, Jen; -, Sarto; Sulaiman, Muhammad
ASEAN Journal of Systems Engineering Vol 3, No 2 (2015): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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Abstract

The floating settlement in Margasari is one of the settlements in Kota Balikpapan which is known as a Beach City. PDAM (State Water Company) as the main resource of clean water fulfillment in Balikpapans, needs to needs to be used efficiently. One of the ways is by processing the Greywater which can be reused for toilet flushing in order to support the concept of Zero Waste.The purpose of this research is to obtain the composition and the potential data of Greywater which is appeared from the data and reusable for the citizens, to find out the effectiveness of the use of Biofilter Reactor as an alternative processing unit of Greywater towards the parameters of pH, BOD, COD, TSS, and NH3-N, and also to identify the citizens? role potential in processing the Greywater towards the concept of Zero Waste in terms of processing domestic liquid waste.The Greywater level in Margasari Floating Settlement of Balikpapan with the parameters of BOD of 520,1?840,1 mg/l, COD of 1.562,5?2.450,0 mg/l, TSS of 297,0?1.047,0 mg/l, and NH3-N of 0,0002-16,257 mg/l is still very high. Margasari Floating Settlement of Balikpapan consists of 6.546 people and 1.198 buldings with an average of Greywater potential of each house of 393,42 l/day or 14.139.360 l/month for the whole area, while the average need for toilet flushing in each house is about 264,03 l/day atau sebesar 9.489.081,60 l/month for the whole area. The Biofilter Reactor can be used to process the Greywater for the whole area. The Biofilter Reactor which has an effective volume of 247 liter, has a diameter of the gravel media of 2,5?4 cm with an optimum effectiveness towards the BOD parameter of 86,54%, COD of 82,27%, TSS of 84,60%, and  NH3-N of 19,99%. It can be used to process the greywater from a house consisted of 5 people with a Greywater debt of 0,36 m3/day, average BOD debt of 686,77 mg/l and average TSS of on Margasari Floating Settlement.
CHARACTERISTICS OF PYROLYSIS OIL BATCH POLYETHYLENE AND POLYSTHYRENE PLASTIC WASTE AT VARIOUS TEMPERATURES Kusuma Dewi, Indah Noor Dwi; Prasetya, Agus; -, Supranto
ASEAN Journal of Systems Engineering Vol 3, No 2 (2015): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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Abstract

Efforts are being carried out in order to utilize polyethylene (PE) and polystyrene (PS) plastic waste by converting them into fuel or oil. One technology that can be used is pyrolysis. This study aims to (1) determine the quantity and the characteristics of oil from the results of pyrolysis polyethylene (PE) and polystyrene (PS) plastic waste at various temperatures which include characteristics of physics (specific gravity, heating value, flash point, pour point, and kinematic viscosity) and chemical characteristics (composition compounds in oil), (2) determine the optimal conditions of process pyrolysis related to the quality and quantity of oil by pyrolysis, and (3) determine the potential treatment of PE and PS plastic waste by pyrolysis method.The materials used in this study were the type of polyethylene (plastic bags) and polystyrene/styrofoam (for fruits or vegetables) plastic waste. The selected temperature variations are T = 400oC, 450oC, and 500oC. Pyrolysis oil was weighed and measured its volume to obtain v/wo and yield.The results showed that the quantity of pyrolysis oil from polyethylene (PE) plastic waste at temperatures of 400, 450, and 500oC based on v/wo (ml/g) respectively were 0.3429 ml/g; 0.5129 ml/g; and 0.199 ml/g while the results of polystyrene (PS) plastic waste at temperatures of 400, 450, and 500oC respectively were 0.89 ml/g; 0.905 ml/g; and 0.915 ml/g. The results of pyrolysis oil based on yield of polyethylene (PE) plastic waste at temperatures of 400, 450, and 500oC respectively were 33.33 wt%; 38.61 wt%; and 15.55 wt% while polystyrene (PS) plastic waste at temperatures of 400, 450, and 500oC respectively were 80.94 wt%; 79.79 wt%; and 80.14 wt%. While the characteristics shown by the results of pyrolysis oil from PE plastic with a temperature of 400oC were closer to kerosene while at temperatures of 450 and 500oC were closer to the characteristics of diesel fuel. As for pyrolysis oil results of PS plastic with temperatures of 400, 450, and 500oC were closer to the characteristics of gasoline. Optimal conditions of pyrolysis oil related to the quantity of pyrolysis of PE plastic at a temperature of 450oC was obtained when the highest of v/wo and yield respectively were 0.5129 ml/g and 38.16 wt%, while for the pyrolysis of PS did not have any optimal conditions. For, oil produced was relatively constant despite the increasing temperatures. Based on technical analysis, handling PE and PS plastic waste using pyrolysis methods provides benefits to society making it feasible to do.
UJI EKSPERIMENTAL SEMEN PAPAN PARTIKEL BERBAHAN BAKU LIMBAH FLY ASH BATU APUNG SEBAGAI BAHAN PEREDAM SUARA Amrullah, Apip
ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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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 Pongoh, Jovita Irene; -, Sarto; Sulaiman, Muhammad
ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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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; Setiawan, Ahmad Agus; Sopha, Bertha Maya
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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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 Saputra, Agung Eka; Kusumawanto, Arif; Syamsiah, Siti
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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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 Renisita, Desy; Sunjoto, Sunjoto; Sarto, Sarto
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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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 Aktawan, Agus; Prasetya, Agus; Wilopo, Wahyu
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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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 Anggraini, Agustina Kiky; Fuchs, Stephan; Silva, Adriana
ASEAN Journal of Systems Engineering Vol 2, No 2 (2014): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

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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.