Pub Date : 2020-08-20DOI: 10.12962/j20882033.v31i2.5581
Nur Aini Febriyana, A. Masduqi
The production of drinking water for the needs of rural communities generally stilldepend on natural water sources. Communities in rural areas usually use groundwaterfor their daily needs. The water supply in Sampang Regency, East Java Provincehas groundwater problem, i.e. the amount of iron and chloride in the water supplyexceed the maximum amount allowed by PERMENKES No. 492/2010. Therefore,this study proposes a method for drinking water treatment using diffused aeration,as pretreatment, and followed by filtration processing. This pretreatment is meantfor reducing iron. The filtration process is carried out in stages with an advancedfilter of low continuous discharge. The filter media uses resin activated carbon andmicrofiltration to remove suspended and dissolved ions. The results of aeration andfiltration processing (AAF) shows that the preprocessed water have Cl-removal of98.39%, TDS-removal of 97.394%, and iron-removal of 97.41%
{"title":"Aeration - Advanced Filtration (AAF) Treatment for Reducing Iron and Chloride in Natural Groundwater","authors":"Nur Aini Febriyana, A. Masduqi","doi":"10.12962/j20882033.v31i2.5581","DOIUrl":"https://doi.org/10.12962/j20882033.v31i2.5581","url":null,"abstract":"The production of drinking water for the needs of rural communities generally stilldepend on natural water sources. Communities in rural areas usually use groundwaterfor their daily needs. The water supply in Sampang Regency, East Java Provincehas groundwater problem, i.e. the amount of iron and chloride in the water supplyexceed the maximum amount allowed by PERMENKES No. 492/2010. Therefore,this study proposes a method for drinking water treatment using diffused aeration,as pretreatment, and followed by filtration processing. This pretreatment is meantfor reducing iron. The filtration process is carried out in stages with an advancedfilter of low continuous discharge. The filter media uses resin activated carbon andmicrofiltration to remove suspended and dissolved ions. The results of aeration andfiltration processing (AAF) shows that the preprocessed water have Cl-removal of98.39%, TDS-removal of 97.394%, and iron-removal of 97.41%","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73432484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-20DOI: 10.12962/j20882033.v31i2.5643
P. Gayatri, E. Pandebesie
Sarbagita Regional Landfill is a regional landfill which is located in Denpasar. At this time, there were closure and landfill arrangement in Sarbagita Regional Landfill. The utilization of ex-landfill land used as green open space requires leachate and gas handling due to the process of waste decomposition is still ongoing. Analysis of gas and leachate potential is needed for further management so that the surrounding environment is not polluted. Analysis of potential gas generation using a triangular method and analysis of leachate generation potential using the Thornwaite method. The maximum gas production occurs in 2023 at 43.367.678,25 m3/year. Gas production gradually declined until it’s estimated to run out in 2034. The number of gas pipe points needed is 19 points. Treatment methods that can be considered are the gas conversion to electricity method and the flaring method. The results of the calculation from leachate potential is 3.84 liters/second. The result will be used to planning a leachate processing installation. Processing system through 4 processing stages, namely processing in anaerobic ponds, facultative ponds, aerobic ponds, and biofilter ponds. Besides considering the technical aspects of technology selection, we also considered the Regional Government’s capability and commitment as the manager.
{"title":"Leachate Production Analysis and Arrangement of Gas Vent Pipelines in Ex-Landfill Sarbagita Regional Landfill","authors":"P. Gayatri, E. Pandebesie","doi":"10.12962/j20882033.v31i2.5643","DOIUrl":"https://doi.org/10.12962/j20882033.v31i2.5643","url":null,"abstract":"Sarbagita Regional Landfill is a regional landfill which is located in Denpasar. At this time, there were closure and landfill arrangement in Sarbagita Regional Landfill. The utilization of ex-landfill land used as green open space requires leachate and gas handling due to the process of waste decomposition is still ongoing. Analysis of gas and leachate potential is needed for further management so that the surrounding environment is not polluted. Analysis of potential gas generation using a triangular method and analysis of leachate generation potential using the Thornwaite method. The maximum gas production occurs in 2023 at 43.367.678,25 m3/year. Gas production gradually declined until it’s estimated to run out in 2034. The number of gas pipe points needed is 19 points. Treatment methods that can be considered are the gas conversion to electricity method and the flaring method. The results of the calculation from leachate potential is 3.84 liters/second. The result will be used to planning a leachate processing installation. Processing system through 4 processing stages, namely processing in anaerobic ponds, facultative ponds, aerobic ponds, and biofilter ponds. Besides considering the technical aspects of technology selection, we also considered the Regional Government’s capability and commitment as the manager.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86030510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-20DOI: 10.12962/J20882033.V31I2.5585
Oxsy Giandi, I. Irawan, R. Ambarwati
The development of communication and information technology has touched the marketing and sales industry. In recent years, there have been many market places in Indonesia, where people buy and sell without meeting face to face. This study investigates the influence of people's intention on the use of behavior to buy at the market place in Indonesia. The market, which becomes the research object is Bukapalak. The data were obtained using the questionnaire. This study obtained 210 respondents, and the data were processed by the method of partial least square. There is a positive and significant influence of behavioral intention from Bukalapak’s consumer on the use (usage) behavior. The dominant determinant indicator in this study is the degree of the purpose of using the market place.
{"title":"Determinants of Behavior Intention and Use Behavior among Bukalapak’s Consumers","authors":"Oxsy Giandi, I. Irawan, R. Ambarwati","doi":"10.12962/J20882033.V31I2.5585","DOIUrl":"https://doi.org/10.12962/J20882033.V31I2.5585","url":null,"abstract":"The development of communication and information technology has touched the marketing and sales industry. In recent years, there have been many market places in Indonesia, where people buy and sell without meeting face to face. This study investigates the influence of people's intention on the use of behavior to buy at the market place in Indonesia. The market, which becomes the research object is Bukapalak. The data were obtained using the questionnaire. This study obtained 210 respondents, and the data were processed by the method of partial least square. There is a positive and significant influence of behavioral intention from Bukalapak’s consumer on the use (usage) behavior. The dominant determinant indicator in this study is the degree of the purpose of using the market place.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84526301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-20DOI: 10.12962/J20882033.V31I2.5641
Mas Odi, E. Suryani
Technological developments have changed the system of the government. The EastJava Provincial Government utilizes Information and Communication Technologyfor the procurement of goods and services. This study aims to measure the level ofacceptance of technology in the system and the satisfaction of applications for thegoods and services procurement in East Java Province. The results of this study canbe used to improve the system that has been made. This study uses the TechnologyAcceptance Model (TAM) method in measuring using (5) aspects, namely Perceptionof Ease of Use, Benefits of Use, Attitudes toward behavior, Interest in Behavior, andBehavior. This study used 90 respondents. The results showed that from the regres-sion test on the variable Perception of Ease of Use with Benefits of Use of 13.5%,Perception of Ease of Use with Attitudes Against Behavior amounted to 38.7%. Ben-efits of Using Attitudes Against Behavior was 23.9%, Benefits of Use with InterestBehavior amounted to 11.5%, Attitudes toward Behavior were Large with Interest inBehavior at 22.2%. Benefits of Use with Behavior amounted to 10.1%, and Interestsin Behavior with Behavior were 13.2%. The study results show that the user’s easeand attitude have the highest value and interest in behavior. Therefore the East Javaprovincial government can maintain the procurement application.
{"title":"Acceptance Analysis of The East Java Province E-Procurement System Using TAM Method","authors":"Mas Odi, E. Suryani","doi":"10.12962/J20882033.V31I2.5641","DOIUrl":"https://doi.org/10.12962/J20882033.V31I2.5641","url":null,"abstract":"Technological developments have changed the system of the government. The EastJava Provincial Government utilizes Information and Communication Technologyfor the procurement of goods and services. This study aims to measure the level ofacceptance of technology in the system and the satisfaction of applications for thegoods and services procurement in East Java Province. The results of this study canbe used to improve the system that has been made. This study uses the TechnologyAcceptance Model (TAM) method in measuring using (5) aspects, namely Perceptionof Ease of Use, Benefits of Use, Attitudes toward behavior, Interest in Behavior, andBehavior. This study used 90 respondents. The results showed that from the regres-sion test on the variable Perception of Ease of Use with Benefits of Use of 13.5%,Perception of Ease of Use with Attitudes Against Behavior amounted to 38.7%. Ben-efits of Using Attitudes Against Behavior was 23.9%, Benefits of Use with InterestBehavior amounted to 11.5%, Attitudes toward Behavior were Large with Interest inBehavior at 22.2%. Benefits of Use with Behavior amounted to 10.1%, and Interestsin Behavior with Behavior were 13.2%. The study results show that the user’s easeand attitude have the highest value and interest in behavior. Therefore the East Javaprovincial government can maintain the procurement application.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"31 1","pages":"127-138"},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49497650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-20DOI: 10.12962/j20882033.v31i2.5582
Afif Fajar Zakariya, I. Defiana, Teddy Badai Samodra
Many residential areas are in the street class with high noise, including the apartment. Noise is often overlooked when it will have an impact on the health of residents. The balcony design in apartments can capture and even reduce noise, so this needs to be further investigated; the most widely used balcony in the apartment is a loggia type balcony. To find out the noise level of a place from a particular source such as traffic noise can be done by direct measurement. Knowing the noise level ratio, the method taken is field measurement, simulation, and mathematical calculations. The method of measuring the field using the Gunawangsa Manyar Apartment object by measuring noise levels carried out for 24 hours on the apartment's balcony, the noise level simulation method was carried out with I-Simpa, and the calculation method used a mathematical model. The results obtained are two types of noise on the apartment balcony, namely vehicle noise is steady, and vehicle noise is impulsive with noisy air-conditioner. The comparison of field measurements with simulation methods and calculations shows a high relationship so that the I-Simpa simulation method and calculation can be used to predict the desired noise level on a particular floor.
{"title":"Noise Characteristics and Sound Pressure Level Prediction of Loggia Balcony in Apartment","authors":"Afif Fajar Zakariya, I. Defiana, Teddy Badai Samodra","doi":"10.12962/j20882033.v31i2.5582","DOIUrl":"https://doi.org/10.12962/j20882033.v31i2.5582","url":null,"abstract":"Many residential areas are in the street class with high noise, including the apartment. Noise is often overlooked when it will have an impact on the health of residents. The balcony design in apartments can capture and even reduce noise, so this needs to be further investigated; the most widely used balcony in the apartment is a loggia type balcony. To find out the noise level of a place from a particular source such as traffic noise can be done by direct measurement. Knowing the noise level ratio, the method taken is field measurement, simulation, and mathematical calculations. The method of measuring the field using the Gunawangsa Manyar Apartment object by measuring noise levels carried out for 24 hours on the apartment's balcony, the noise level simulation method was carried out with I-Simpa, and the calculation method used a mathematical model. The results obtained are two types of noise on the apartment balcony, namely vehicle noise is steady, and vehicle noise is impulsive with noisy air-conditioner. The comparison of field measurements with simulation methods and calculations shows a high relationship so that the I-Simpa simulation method and calculation can be used to predict the desired noise level on a particular floor.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82382898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-20DOI: 10.12962/j20882033.v31i2.5607
Rizvanda Ryan, Savero, G. N. Antaryama, B. Soemardiono, Kampus Its Sukolilo Gedung Arsitektur
This research reviews the theories and design of energy-saving office buildings that apply evaporative cooling concepts to inhibit solar heat and improve natural cooling. The limited land in urban areas forces the building orientation facing East-West to increase building heat gain in tropical regions. This research is interesting because evaporative cooling is rarely found in office building design, especially in tropical areas. The method used is literature searching (theory, journal, and president) related to the energy-saving building (passive design) and passive cooling with evaporative cooling techniques. A review of design strategies can be used as a reference for general criteria applied at the design stage of office building architectural design. As a limitation, questions are needed to find related theories such as (1) what are the factors of building heat control and the criteria required in designing energy-saving office building (2) how to apply evaporative cooling techniques to design the energy-saving office building. Solar heat is a key factor in building heat gain. So it must be noticed to control building heat to protect heat transfer into buildings. The results of the design energy saving office buildings in the tropical region have required the application of passive designs such as building orientation, building core placement, shading elements, cross ventilation, natural lighting, producing shape, and application of evaporative cooling with consideration of wind direction and hottest side due to solar radiation
{"title":"Review on Design Strategies of Energy Saving Office Building with Evaporative Cooling in Tropical Region","authors":"Rizvanda Ryan, Savero, G. N. Antaryama, B. Soemardiono, Kampus Its Sukolilo Gedung Arsitektur","doi":"10.12962/j20882033.v31i2.5607","DOIUrl":"https://doi.org/10.12962/j20882033.v31i2.5607","url":null,"abstract":"This research reviews the theories and design of energy-saving office buildings that apply evaporative cooling concepts to inhibit solar heat and improve natural cooling. The limited land in urban areas forces the building orientation facing East-West to increase building heat gain in tropical regions. This research is interesting because evaporative cooling is rarely found in office building design, especially in tropical areas. The method used is literature searching (theory, journal, and president) related to the energy-saving building (passive design) and passive cooling with evaporative cooling techniques. A review of design strategies can be used as a reference for general criteria applied at the design stage of office building architectural design. As a limitation, questions are needed to find related theories such as (1) what are the factors of building heat control and the criteria required in designing energy-saving office building (2) how to apply evaporative cooling techniques to design the energy-saving office building. Solar heat is a key factor in building heat gain. So it must be noticed to control building heat to protect heat transfer into buildings. The results of the design energy saving office buildings in the tropical region have required the application of passive designs such as building orientation, building core placement, shading elements, cross ventilation, natural lighting, producing shape, and application of evaporative cooling with consideration of wind direction and hottest side due to solar radiation","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66432132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-20DOI: 10.12962/j20882033.v31i2.5642
Y. Pratiwi, I. Purwanti, J. Hermana
Blitar is one of the regencies in Indonesia that doesn’t have Septage Treatment Plant (STP). The high coverage of on-site wastewater system access as well as routine desludging needs in the Decentralized Wastewater Treatment Plant (DWWTP) requires further septage process of septage in the form of STP. However, almost 90% of STP in Indonesia was not working correctly due to poor effluent quality and inadequate operational and maintenance costs. This study referred to the current conditions of domestic wastewater management obtained from interviews and questionnaires to identify the real needs of establishing STP efficiently and sustain-ably. Furthermore, this paper contained the analysis of STP capacity, site selection, sludge treatment units, land requirements, capital costs, operational and maintenance costs. By considering the existing desludging activity, the capacity of STP in 2019 was 20.95 m3/day. Meanwhile, the capacity of STP at the end of the 20-year design period was 41.36 m3/day. Although site selection analysis was obtained three locations for STP, the selected location of STP was the one which was centrally located in one location, namely Sutojayan Sub-District. One location of STP was considered to be more efficient from land needs, operational 188,000/septic tank.
{"title":"The Needs for Septage Treatment Plant in The Urban Areas of Blitar Regency: A Research Study","authors":"Y. Pratiwi, I. Purwanti, J. Hermana","doi":"10.12962/j20882033.v31i2.5642","DOIUrl":"https://doi.org/10.12962/j20882033.v31i2.5642","url":null,"abstract":"Blitar is one of the regencies in Indonesia that doesn’t have Septage Treatment Plant (STP). The high coverage of on-site wastewater system access as well as routine desludging needs in the Decentralized Wastewater Treatment Plant (DWWTP) requires further septage process of septage in the form of STP. However, almost 90% of STP in Indonesia was not working correctly due to poor effluent quality and inadequate operational and maintenance costs. This study referred to the current conditions of domestic wastewater management obtained from interviews and questionnaires to identify the real needs of establishing STP efficiently and sustain-ably. Furthermore, this paper contained the analysis of STP capacity, site selection, sludge treatment units, land requirements, capital costs, operational and maintenance costs. By considering the existing desludging activity, the capacity of STP in 2019 was 20.95 m3/day. Meanwhile, the capacity of STP at the end of the 20-year design period was 41.36 m3/day. Although site selection analysis was obtained three locations for STP, the selected location of STP was the one which was centrally located in one location, namely Sutojayan Sub-District. One location of STP was considered to be more efficient from land needs, operational 188,000/septic tank.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78371204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.12962/J20882033.V31I2.6572
S. Adusei
Hibiscus Sabdariffa (Roselle) is renowned for its delicacy and healing properties. Thestudy aimed at evaluating the bioactive compounds (phytochemicals) and antioxidantactivity of leaf, stem, and calyx of roselle, extracted with methanol. Phytochemicalswere identified using numerous test methods and quantified with a UV-Vis spec-trophotometer. The screening test revealed a higher number of phytochemicals in thecalyx extract than the leaf or stem. With the quantification, the highest concentrationwas recorded in the calyx, followed by the leaf and then the stem. The antioxi-dant activity of the investigated plant was in the order of calyx>leaf>stem. Higherrecoveries, ranging between 90%-110%, was obtained for all compounds. Therefore,this study provides evidence that the leaf, stem, and calyces of roselle plants arethe probable source of antioxidants and many bioactive compounds, justifying theirethnopharmacological use in conventional medicines.
{"title":"Bioactive Compounds and Antioxidant Evaluation of Methanolic Extract of Hibiscus Sabdariffa","authors":"S. Adusei","doi":"10.12962/J20882033.V31I2.6572","DOIUrl":"https://doi.org/10.12962/J20882033.V31I2.6572","url":null,"abstract":"Hibiscus Sabdariffa (Roselle) is renowned for its delicacy and healing properties. Thestudy aimed at evaluating the bioactive compounds (phytochemicals) and antioxidantactivity of leaf, stem, and calyx of roselle, extracted with methanol. Phytochemicalswere identified using numerous test methods and quantified with a UV-Vis spec-trophotometer. The screening test revealed a higher number of phytochemicals in thecalyx extract than the leaf or stem. With the quantification, the highest concentrationwas recorded in the calyx, followed by the leaf and then the stem. The antioxi-dant activity of the investigated plant was in the order of calyx>leaf>stem. Higherrecoveries, ranging between 90%-110%, was obtained for all compounds. Therefore,this study provides evidence that the leaf, stem, and calyces of roselle plants arethe probable source of antioxidants and many bioactive compounds, justifying theirethnopharmacological use in conventional medicines.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"31 1","pages":"139-147"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49410771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-27DOI: 10.12962/J20882033.V31I3.6345
Rengga Sanditya, A. I. Juniani, H. N. Amrullah, Wiediartini Wiediartini
Argon Purification Unit is a processing unit to purify the crude argon using hydrogen gas through an automatic machinery process. Based on the hazardous material and its automatic machinery process, the argon purification unit needs to be assessed for risk control consideration and business performance. This research proposed risk assessment of argon purification unit based on the failure modes using Failure Modes, Effects and Criticality Analysis (FMECA) with Fuzzy Analytical Hierarchy Process (Fuzzy-AHP) approach to minimize the risks and losses. In this research, FMECA is used to identify the potential failure modes, failure mechanism (causes), potential failure effects for each unit component and evaluate the risk by determining risk priority number (RPN). The RPN is the product of severity, occurrence, and detection variables. Then, Fuzzy-AHP is used to determine the weight of each variable based on its hierarchy. The fuzzy-AHP approach aims to increase validity and decrease expert judgment subjectivity in the risk assessment process for each failure mode by considering variables’ weight. The result of RPN is gained by multiplying each failure mode’s variables by considering the importance of variables. This research results weight of severity is 0.43, which is the highest of all variables. The highest RPN is 8.76, shown by the leaked joint of the argon compressor. This research indicates that the application of the fuzzy-AHP approach in FMECA can identify and evaluate the potential risk of the Argon Purification Unit validly and objectively, which provides the different weight of RPN variables.
{"title":"Integrated Risk Assessment on Argon Purification Unit Based on FMECA and Fuzzy-AHP","authors":"Rengga Sanditya, A. I. Juniani, H. N. Amrullah, Wiediartini Wiediartini","doi":"10.12962/J20882033.V31I3.6345","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.6345","url":null,"abstract":"Argon Purification Unit is a processing unit to purify the crude argon using hydrogen gas through an automatic machinery process. Based on the hazardous material and its automatic machinery process, the argon purification unit needs to be assessed for risk control consideration and business performance. This research proposed risk assessment of argon purification unit based on the failure modes using Failure Modes, Effects and Criticality Analysis (FMECA) with Fuzzy Analytical Hierarchy Process (Fuzzy-AHP) approach to minimize the risks and losses. In this research, FMECA is used to identify the potential failure modes, failure mechanism (causes), potential failure effects for each unit component and evaluate the risk by determining risk priority number (RPN). The RPN is the product of severity, occurrence, and detection variables. Then, Fuzzy-AHP is used to determine the weight of each variable based on its hierarchy. The fuzzy-AHP approach aims to increase validity and decrease expert judgment subjectivity in the risk assessment process for each failure mode by considering variables’ weight. The result of RPN is gained by multiplying each failure mode’s variables by considering the importance of variables. This research results weight of severity is 0.43, which is the highest of all variables. The highest RPN is 8.76, shown by the leaked joint of the argon compressor. This research indicates that the application of the fuzzy-AHP approach in FMECA can identify and evaluate the potential risk of the Argon Purification Unit validly and objectively, which provides the different weight of RPN variables.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73241373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-27DOI: 10.12962/J20882033.V31I3.6367
Achmad Arif Alfin, R. V. Ginardi
Soil fertility has a significant role in the sugarcane plantation industry to maintain plant fertility so that optimal yield productivity is obtained. The management system that has been used by farmers only based on practices and estimation, so that it can not determine the exact needs of water, lime and fertilizers in each area of the plant. Therefore, we need a system that are able to provide a reference for giving water volume, lime content and fertilization according to the level of nutritional needs of sugarcane plants. This study aims to design a system that is able to provide recommendations for sugarcane needs, based on soil nutrient content using the fuzzy logic method. The first step in this method is the fuzzification process carried out on four types of data used as input parameters, namely soil moisture, soil pH, plant phase, and nutrient content. The next step is choosing the relevant criteria from each assessment to get best alternative. The next stage, a membership function is created to estimate the next process and defuzzification process. According to the result of the study found the value of cost efficiency, optimization of growth in stem height and plant tillers. The resulting cost efficiency is 30.05% compared to the factory method. While the level of optimization of plant growth compared to the factory method, tillering growth increased 8% but the growth of primary stem height was higher by the factory method of 3%.
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