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Journal of Enviromental Engineering and Sustainable Technology

JEEST
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Published by Universitas Brawijaya

ISSN : 23563117 EISSN : 23563109 DOI : -

Core Subject : Social,

Environmental Science

JEEST is an interdisciplinary and refereed journal, addresses matters related to environmental engineering and sustainable technology. Its range of themes encompasses ecological studies, field research, empirical work and descriptive analyses on topics such as environmental systems, environmental policies and politics, environmental legislation, environmental impact assessment, air, water and land pollution, water and energy related issues, engineering innovations, development, technical solutions and sustainability technology. Other matters related to or which influence the international debate on sustainability will be also considered.

Arjuna Subject : -

Articles 124 Documents

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THERMAL COMFORT STUDY IN CONVERTING PROCESS OF PLASTICS MANUFACTURING INDUSTRY Sugiono Sugiono; Oyong Novareza; Ryan Fardian
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Thermal comfort is one of environment factors that can have a significant impact on workers performance. For a better thermal comfort, several factors that affect thermal conditions should be considered. Air temperature is a factor that give significant effect on thermal conditions. This paper is study about thermal comfort in a building for converting process at plastics manufacturing industry located in Malang. During the day, temperature on that building can reach as high as 36 °C. CFD (Computational Fluid Dynamics) simulations is use to determine the air properties inside the building. Thermal comfort experienced by workers through this study was based on PMV (Predicted Mean Vote) model and PPD (Predicted Percentage of Dissatisfied) model. The result of this study shows that thermal comfort in building of converting process can be increased by reduced heat sources on that building. Thermal comfort can be said increased when PMV and PPD value are decreased. After improvement recommendations is given, the PMV value for existing conditions in range 1.83 to 2.82 is decreased into range 1.63 to 2.18, while the PPD value for existing conditions in range 68.9% to 98% is decreased into range 58.2% to 84.2%.

PENENTUAN STATUS DAYA DUKUNG LINGKUNGAN BERBASIS KESESUAIAN LAHAN DAN KESEIMBANGAN LAHAN DI KOTA BATU, JAWA TIMUR, INDONESIA Bambang Rahadi Widiatmono; Novia Lusiana; Euis Elih Nurlaelih
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Alih fungsi lahan yang melebihi daya dukung lingkungan mengakibatkan penurunan kualitas lingkungan seperti banjir dan peningkatan sedimentasi. Sebagai upaya pengendalian terhadap pengembangan wilayah maka penerapan daya dukung lingkungan menjadi sangat penting untuk diperhitungkan. Penentuan daya dukung lingkungan meliputi daya dukung berbasis kemampuan lahan dan neraca lahan. Tujuan penelitian ini adalah 1) mengevaluasi penggunaan lahan terhadap daya dukung lingkungan berdasarkan dua basis untuk keadaaan saat ini (existing land use) tahun 2010, 2) Mengetahui dan memprediksi status daya dukung lingkungan pada 20 tahun yang akan datang (tahun 2030) berdasarkan perhitungan prediksi dan Rencana Tata Ruang Wilayah (RTRW). Metode analisis yang digunakan adalah deskriptif, dengan mendeskripsikan hasil perhitungan daya dukung melalui status daya dukung surplus dan defisit. Hasil penelitian menunjukkan bahwa luas penggunaan lahan eksisting yang tidak sesuai dengan kelas kemampuan lahan adalah sebesar 25,67%, sedangkan berdasarkan rencana penataan ruang luas penggunaan lahan yang tidak sesuai adalah 32,05%. Perhitungan neraca lahan yang menunjukkan hasil bahwa untuk Tahun 2012 dan prediksi Tahun 2031 masih berstatus surplus aman. Kata Kunci : Daya Dukung Lingkungan, Kelas Kemampuan, Kesesuaian, Neraca Lahan

COLLABORATIVE FILE SHARING SYSTEM USING JXTA P2P NETWORKING INFRASTRUCTURE – AN APPLICATION DEVELOPMENT Kasyful Amron
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

This work aims to develop a simple workflow based collaborative application running over peer to peer network. Basic features of the application are to support communication and coordination in a workflow-based document production. Its offer services for text chat and file sharing. Text chat has two features, group chat or conference and personal chat, while file sharing service supports both synchronous and asynchronous mode that implies a repository function. As this application is developed with the assumption that it will be applied within a close environment, it is complied with a general security mechanism. Design and development processes of this application are depicted in the form of UML diagrams and implemented using Java Programming Language.

FIRE DISASTER MODEL FOR CAMPUS BUILDING, A CASE STUDY OF BRAWIJAYA UNIVERSITY Heru Sufianto; Agung Murti Nugroho; Satya Aditama
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

ABTSRACTFires in buildings have significant impact on communities both socially and economically. In education facilities, fire incidents have potential impact on academical activities and research products. Fire authorities, practitioners and relevant bodies have been addressed this issue partially on the points of physical aspects and management addressed to fire safety. This study seeks the importance element of a framework that should be implemented comprehensively increasing campus building fire protection around the clock. Number of buildings in University of Brawijaya were used as the sample study. Assessment on fire protection tools of buildings have been performed to seek potential fire risk, a questionnaire has been dirtributed online throughout building occupants seeking level of awareness and knowledge toward fire incidents. Meanwhile, existing fire disaster models implemented in some campus buildings been reviewed. The study found 4 elements of the fire disaster model to be taken into account, including: occupant’s knowledge and awareness, quality infrastructure of the building, insentives, and control.Keywords: fire safety management, fire protection, building occupants, fire safety awareness.

APPLICATION OF TAGUCHI EXPERIMENT FOR THE COMPOSITION OPTIMIZATION OF RAW MATERIAL IN MAKING OF TERRAZO CHAIR Oyong Novareza
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Sentra Sanitair Karang Besuki is one of the Small Medium Enterprises that develops in Malang city. One of the products that become observations object in this research is the terrazzo materials seat. One of the problems is the absence of raw material composition standard used for producing terrazzo materials seat. To determine the raw material composition standard, experiment is done using taguchi method. Based on the reference, compression strength should be at least comply with the standard rules by the Indonesian reinforced concrete regulation (pbi 1971 n.i.-2) that is 2nd grade of concrete with k175 standard. There are four factors that considered has impact on the compression strength of terazzo material seat, that is cement, crushed rocks, grit, and mill. The orthogonal array design used in this experiment is L9 (34). The optimal setting obtained from this experiments is 3rd level for A factor (cement: 30%), 2nd level for B factor (Crushed rocks: 22.5 %), 1st level for C factor (grit: 37.5%), and 3rd level for D factor (mill: 10%). The confident interval obtained in this taguchi experiment is 177.24+2.61 for the average value and 32.41+3.71 for the variance (SNR). While the confidence interval in the confirmatory experiments is 165.9+15.65 for the average value and 34.48+4.03 for the variance (SNR). So it is concluded that the optimal setting level of the terrazzo materials seats is acceptable because the confident interval of the confirmatory experiment is still in the optimal interval results.

FAULT DETECTION AND PROTECTION METHOD ON LOW VOLTAGE DC MICRO-GRID SYSTEM Sholeh Hadi Pramono; Eka Maulana; Hadi Suyono; Akhmad Zainuri
Journal of Environmental Engineering and Sustainable Technology Vol 5, No 1 (2018)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

ABSTRACTMicro-grid architecture is designed for small scale model in Brawijaya University area in order to change conventional AC-based electricity system previously. Low voltage direct current (LVDC) levels are proposed and charactized to obtain the optimal design of the DC grid system. Some parameters related to the electrical phenomenon of voltage, current and power which occur in distributed-generation, distribution grid, and load sites were also analyzed. Detailed model of photovoltaic (PV) and PMSG was implemented with operational analysis and simulated with study case modes to achieved the power and system efficiency. DC bus is conducted to accommodate the distribution power between PV generation, battery and super capacitor for energy sorage element, distributed-load and other grid utilization.Various condition and operation have been characterized toward stability performance of the voltage and current of 12-36 volts and 0-20 A DC, respectively. This architectural design can be utilized to develop an actual design and small scale implementation of the LVDC smart micro-grid system.Keywords: Fult Detection Protection Micro-grid Low Voltage DC

DENTAL DISEASE IDENTIFICATION USING FUZZY INFERENCE SYSTEM Andi Maulidinnawati A K Parewe; Wayan Firdaus Mahmudy
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

In the field of dentistry there are many types / variants of dental diseases emerging that make doctors and medical students may face difficulty to identify of dental diseases. In this study, a computers application is developed as a tool for doctors and medical students to identify various types of dental disease accurately. Fuzzy inference system is used an identification method. The method uses symptoms of dental disease as input parameters. Dental disease identification system using Fuzzy Inference System with Minmax. The parameters used to limit the fuzzy membership functions based on expert opinion. The accuracy of the system is calculated by comparing the output system with expert judgment. Experimental results show that the system is built to produce 85% accuracy.

IDENTIFICATION OF PATCHOULI PLANTS USING LANDSAT-8 SATELLITE IMAGERY AND IMPROVED K-MEANS METHOD Candra Dewi; Muhammad Syaifuddin Zuhri; Achmad Basuki; Budi Darma Setiawan
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

To maintain the availability of the patchouli plants required monitoring the spread of patchouli plantation. This study performed the identification of patchouli plant through Landsat-8 satellite imagery and Improved K-Means method. Improved was done on this study include the process of determining the initial cluster by specifying the closeness between the data and the determination of the number of cluster (K) by using the histogram equalization technique. The result of internal criteria testing shows that determining the number of clusters using the histogram is less effective because it produces the lower value of the silhouette. On almost all image data test found the best value of the silhouette's coefficient is 75.089% at K=2 and data in February. Furthermore, based on the results of testing the external criteria known the highest purity value in February data with a number of cluster 5 is 0.6829268. The test results also show that the use of the Improved K-Means on the Landsat-8 image has not been able to recognize the difference patchouli plants with other crops due to the limited resolution of imagery data and also the minimum number and variation of test data. But, visually the patchouli plant cluster is found for February data while the age of the rice crop surrounding the patchouli is still in the early phase of planting.

OCEAN CURRENTS ENERGY FOR ELECTRICITY GENERATION AND ITS POTENTIAL IN EAST JAVA WATER, INDONESIA Nurin Hidayati; Muhammad Mahmudi; Dhira Kurniawan Saputra; Muhammad Musa; Hery Setiawan Purnawali
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Electrical energy is one of the vital needs of the coastal communities, especially in coastal areas that are not affordable electricity network. To meet these needs energy diversification efforts are undertaken, such as the utilization of the energy potential of ocean currents. The aim of this study was to determine the seabed morphology and properties of hydro-oceanography as a reference the exact location in the utilization of the energy of ocean currents. Location of research in the territorial waters of East Java. Research methods such as measurement of currents, tidal observation, observation of meteorological parameters and conditions of the seabed morphology and the coastal area of research. The study was conducted to estimate the potential energy of ocean currents are spatially and temporally by utilizing a hydrodynamic model simulation results and the results of current data measurement in the field, and convert them into power unit. Which will ultimately produced maps of potential energy from ocean currents of East Java waters territory. In comparison, there are several advantages of ocean current energy utilization compared to other energy generation, such as the production of electricity generated by ocean currents each year tend to be stable and more environmentally friendly because without using fuel. Potential sites for power plants in East Java waters of the ocean currents are respectively Madura Strait Region, Southern Water of East Java, and Bali Strait water.Keywords: Ocean Currents, Energy, East Java

THE EFFECT OF CRYSTALLIZER ROTATION ON THE GAS HYDRATE PERFORMANCES Widya Wijayanti; Mega Nur Sasongko; Nurkholis Hamidy; Purnami Purnami
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

The performance of hydrate was shown by the hydrate formation rate, the hydrate stability, and the storage capacity. In the study, we investigated the hydrate performance by influencing the rotation of crystallizer that predicted to increase the agitation of the hydrate performance. The hydrate represent the bond of water molecules and gas absorbed by the water molecules. In the experiment, we used the 50% propane and 50% butane as the gas absorbed. The gas was injected in a crystallizer at 3 bar pressure, then the crystallizer was rotated by 100, 200, and 300 rpm. The results shows that the best performances of hydrate when the crystallizer was rotated at 300 rpm. The crystallizer rotation speed of 300 rpm had the highest the formation rate and the decomposition rate. The highest decomposition rate indicated the highest stability. Meanwhile, the highest hydrate storage capacity was also occured at the rotation of 300 rpm as 2809 V / V.

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