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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.

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Articles 9 Documents

Search results for , issue "Vol 3, No 2 (2016)" : 9 Documents clear

ETHANOL FERMENTATION POTENCY OF WILD YEAST ON BAMBOO RHYZOSPHERE Anton Muhibuddin
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Bamboo plant rhizosphere known as source of simbiotic useful microorganisms, including yeast. Wild yeast explored should be tested it’s adaptability to new ecology especially nutritional source availability. The research aim to get potential yeast which can work well during fermentation process in apple juice substrate.We were isolated yeast from three different locations: Ketawanggede District, Karangploso District, and Lowokwaru District. All locations was located around Malang city.Result showed that there were found 13 isolates yeast: Protomyces sp, Agaricostilbum sp1, Agaricostilbum sp2, Agaricostilbum sp3, Debaryomyces sp1, Debaryomyces sp2, Debaryomyces sp3, Trigonopsis sp1, Trigonopsis sp2, Udeniomyces sp1, Udeniomyces sp2, Ascoidea hylocieti, and Komagataella sp. Diversity index indicates medium category to low category and dominance index in all location indicates high category.Fermentation test showed improvements in observation variables at 24 and 72 hours including temperature, cells number, and alcohol percentage. The highest alcohol percentage were 11.6% and 10% that produced by the treatment of Agaricostilbum sp3 and Trigonopsis sp1 respectively.Keyword: Yeast, bamboo plant rhizosphere, apple juice, and fermentation.

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

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

AKTIVITAS FOTOKATALITIK BEADS TiO2-N/ZEOLIT-KITOSAN PADA FOTODEGRADASI METILEN BIRU (KAJIAN PENGEMBANAN, SUMBER SINAR DAN LAMA PENYINARAN) Sri Wardhani; Akhmad Bahari; Muhammad Misbah Khunur
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Photodegradation is the decomposition of the compound semiconductor with light. This study aims to determine the photocatalytic activity of TiO2-N / zeolite-chitosan granules by studying the effect of TiO2-N impregnation on zeolites, light source, and the effect of exposure time on the photodegradation of Methylene Blue (MB). Zeolites are activated with HCl 0.4 M. TiO2-N synthesized by the method of sonication with urea as N source, then TiO2-N impregnated into the zeolite. Beads photocatalyst TiO2-N/zeolite-chitosan synthesized by mixing chitosan / acetic acid with a photocatalyst then dripped by syringe pump into 0.4 M NaOH to form granules. The energy band gap of the photocatalyst was determined by Reflactance Diffuse Spectroscopy (DRS). Beads photocatalyst TiO2-N/zeolite-chitosan tested their activity by adding 0,1g beads photocatalyst TiO2-N/zeolite-chitosan with 25 mL MB 20 mg / L and irradiated with sunlight/UV for 1-5 hours. The characterization results DRS beads photocatalyst TiO2-N/zeolite-chitosan has an energy band gap of 2.4 eV. The results showed that impregnation on zeolites can increase photodegradation MB. Light source also affects the catalytic activity of TiO2-N / zeolite-chitosan beads, sunlight provides greater activity than UV rays. The longer the exposure to the sun for up to 5 hours, TiO2-N/zeolite-chitosan granules can degrade MB amounted to 55.08%.Keywords: beads, TiO2-N, Methylene Blue, zeolite, chitosan.

PENGEREMAN REGENERATIF MOTOR ARUS SEARAH TANPA SIKAT (BLDC) UNTUK MENGISI BATERAI PADA SEPEDA GOWES Soeprapto Soeprapto; Unggul Wibawa; Mahfudz Sidiq; Teguh Utomo; Sari Yuniarti
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

To improve the efficiency of electric bike, it takes a regenerative braking system to replace the mechanical braking system for regenerative braking can convert the kinetic energy to be dumped into heat through the brake into electrical energy that can be used to charge the battery.To realize this tool, it takes a bicycle, engine direct current brushless, three-phase uncontrolled rectifier, boost converter, a battery, and a controller. Braking torque on the engine influenced by the current output of the machine. The regenerative braking system is controlled by a microcontroller which will vary in value dutycycle boost converter so that the value of the input current boost converter is always directly proportional to the output current value of the machine can be changed.Based on test results obtained average energy of 0.0048360 Wh for the initial speed of 30 km / h and 0.0100300 Wh for the initial speed of 40 km / h with the engine inertia loads only. Keywords : Regenerative braking, direct current brushless machine, rectifier, boost converters, controllers, batteries, bicycles.

HYBRID POWER PLANT FEASIBILITY STUDY IN MANDANGIN ISLAND USING HOMER SOFTWARE Soeprapto Soeprapto; Unggul Wibawa; Mahfudz Shidiq
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

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In this research, a feasibility study of Diesel Power Plant (diesel) existing on the island Mandangin with hibrid using Renewable Energy (ET) in the form of photovoltaic (PV). HOMER is an optimization analysis software for power generation system design, seen from the value of the Net Present Cost (NPC) the lowest. HOMER itself is an abbreviation of Hybrid Optimization Model for Electric Renewable developed by the National Renewable Energy Laboratory (NREL) USA. The system design is based on data obtained from diesel Mandangin island. of the total power of 1500 kW able to be raised, but only used up to 400 kW. For design optimization was performed by adding a PV system as a source of renewable energy amounting to 300 kW. Analysis of the resulting HOMER, designs are made to meet the needs of 100% load with energy excess of 0.01%. Hybrid system configuration are made which have high initial costs, but the total NPC generated was reduced by $ 4,948,556. For the amount of fuel used, Hybrid system uses less fuel amount to a reduction of 184 565 L / year or a total of $ 180.931 per year compared with the existing diesel system. The amount of emissions released Hybrid system was also decreased with the decrease of 486.123 kg / yr of CO2 and 1,200 kg / yr of CO. In conclusion, HOMER is a software that can optimize power generation.

OPTIMIZATION OF MULTI-TRIP VEHICLE ROUTING PROBLEM WITH TIME WINDOWS USING GENETIC ALGORITHM Yusuf Priyo Anggodo; Amalia Kartika Ariyani; Muhammad Khaerul Ardi; Wayan Firdaus Mahmudy
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

This research studied the application of multitrip vehicle routing problem with time windows (VRPTW) on the problems of the tourist routes in Banyuwangi. The problems of ordinary VRPTW has only one route to the finish line that will be targeted with specific time limits while the multi-trip VRPTW has several tourist routes and one central point as the reference point for determining the route of the tour as well as the deadline for each tour. Genetic algorithm used to solve this problem because it can overcome the problem of combinatorial effectively and efficiently, moreover it can reach solutions globally so that it can produce the optimum solution. Chromosome on the Genetic Algorithm represents the permutation of the overall tour. After decoding there are three chromosome segments created, where each segment represents a visit of tourist attractions in one day. This research provides the optimal result i.e. a solution route with the shortest commute time and a fast computing time so it is very helpful in determining the route of the tourist trips with the closest mileage based on their places to stay (centre point).

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