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Journal of Environmental Engineering and Sustainable Technology

jeest
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Published by Universitas Brawijaya

ISSN : 23563109 EISSN : 23563117 DOI : https://doi.org/10.21776/ub.jeest

Core Subject : Science, Social, Engineering,

Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Environmental Science Mechanical Engineering

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 : Ilmu Lingkungan (semua ketegori) - Ilmu Lingkungan (Lain-Lain)

Articles 156 Documents

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TORSION STRENGTH OF ROUND BAR A6061 FRICTION WELD JOINT INFLUENCED BY FRICTION TIME, UPSET FORCE AND ONE-SIDE CONE GEOMETRY Yudy Surya Irawan; Wahyono Suprapto; Tjuk Oerbandono
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2017.004.02.3

ABSTRACTEffect of friction time, upset force and one-side cone geometry on torsion strength of A6061 round bar friction weld joint was studied. Round bar commercial A6061 was friction welded with initial compression force of 2.5 kN on stationary part and the rotated part had revolution speed of 1600 rpm with variation of friction time of 45, 50 and 55 minutes. In the upset stage, the variation of upset force of 5 kN, 7.5 kN and 10 kN with the same upset holding time of 110 seconds. The stationary part of the specimen had friction area with variation of cone geometry that represented with ratio of upper diameter, D1 and lower diameter, D2, D1/D2. It was found friction time and the ratio of D1/D2 affected torsion strength in the upset force below 10 kN. In case of the higher upset force of 10 kN, the upset force more dominant to affect torsion strength of the continuous drive friction weld (CDFW) joint. The specimen with maximum torsion strength has more precipitates in grains of microstructures compared to that of specimen with lower torsion strength. Keywords: Continuous drive friction welding, aluminum, friction time, upset force, one-sdie cone geometry, torsion strength.

GREEN STRUCTURAL LIGHTWEIGHT CONCRETE UTILIZING MEDIUM-K BASALTIC ANDESITIC PUMICE AND SCORIA Agoes Soehardjono; Hendro Suseno; I Nyoman Gede Wardana; Arief Rahmansyah
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

ABSTRACTThis study presented observations of the suitability of medium-K basaltic andesitic pumice and scoria as a coarse aggregate on structural lightweight concrete that was environmental friendly and energy saving. Testing results indicated that this typical pumice and scoria fulfilled the requirements as a coarse lightweight aggregate. The mix design of specified compressive strengths yielded a lower proportion of Portland Pozzolan Cement (PPC) than previous studies. Testing results of fresh concrete showed a satisfactory workability at determined slump values without segregation and excessive bleeding. Testing results of hardened concrete showed that the density reduction was about 20 %, but there was a density of scoria lightweight concrete that exceeded slightly the requirements. All compressive strengths complied with the requirement but there was a pumice lightweight concrete that did not reach the specified compressive strength. The modulus of elasticity and splitting tensile strength were relatively low compared to normalweight concrete as control, whereas drying shrinkage was lower than in previous studies.KEYWORDS : green lightweight concrete, pumice, scoria, environmental friendly, energy saving.

ONE DIMENSIONAL SIMULATION OF DC BIASED ARGON PLASMA USING COMSOL MULTIPHYSICS Dionysius Joseph Djoko Herry Santjojo
Journal of Environmental Engineering and Sustainable Technology Vol 5, No 1 (2018)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

The character of a argon plasma in a DC biased reactor was simulated using 1-dimensional model. The model and simulation was carried out using COMSOL multiphysics software. Results of the simulation show that the model and can be used to predict the character and state of the Ar plasma such as distribution of electron density and Ar+ ion, electron temperature, and electric potential in the plasma space. Furthermore, the model predicts that the argon plasma is formed near the cathode (r<0.5 cm) at the end of the simulation. And, the higher the pressure the higher the plasma density produced at pressures less than 100 Pa.

OPTIMIZATION OF FROZEN FOOD DISTRIBUTION USING GENETIC ALGORITHMS Widdia Lesmawati; Asyrofa Rahmi; Wayan Firdaus Mahmudy
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Nowadays, 30% of Indonesian consume frozen foods because it is more practical and efficient. The increase of demand requires a good distribution system. The distribution problem can be solved using genetic algorithms. Crossover method used in this study is one-cut point crossover, the mutation method used is reciprocal exchange mutation and the selection method used is elitism selection. The data used in this study is 15 of customers, 11 of product types, 5 vehicles and distance data between regions. From the tests, we found that optimal results are achieved using the population size of 1950, 700 generations, a combination of crossover rate (cr) = 0.5 and mutation rate (mr) = 0.6. The final result is a combination of the customer and vehicle order that distribute all products to all customers with the minimum total distance and cost.

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1249.811 KB)

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.

AUTOMATIC CLUSTERING AND OPTIMIZED FUZZY LOGICAL RELATIONSHIPS FOR MINIMUM LIVING NEEDS FORECASTING Yusuf Priyo Anggodo; Wayan Firdaus Mahmudy
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Forecasting of minimum living needs is useful for companies in financial planning next year. In this study, the firescasting is done using automatic clustering and optimized fuzzy logical relationships. Automatic clustering is used to form a sub-interval time series data. Particle swarm optimization is used to set and optimze interval values in fuzzy logical relationships. The data used as many as 11 years of historical data from 2005-2015. The optimal value of the test results obtained by the p = 4, the number of iterations = 100, the number of particles = 45, a combination of Vmin and Vmax = [-0.6, 0.6], as well as combinations Wmax and Wmin = [0, 4, 0 , 8]. These parameters values produce good forecasting results.Keywords: minimum living needs, automatic clustering, particle swarm optimization, fuzzy logical relationships

MICROENCAPSULATION OF Cytrus hystrix OIL AND ITS ACTIVITY TEST AS AN ANTIMICROBIAL AGENT Warsito Warsito; Noorhamdani Noorhamdani; Sukardi Sukardi; Rissa Dwi Susanti
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Microencapsulation Kaffir lime oil (C. hystrix DC.) has advantages such as capable of controlling the evaporation process, oxidation by air or oxygen and release the active ingredient is stable, thus providing a constant concentration over long periods of therapy. In this research microencapsulation of kaffir lime oil from leaves (MJP-D) and rind (MJP-KB) using chitosan to crosslinking with glutaraldehyde (ratio 2:1). Characterization of kaffir lime oil use Gas chromatography-mass spectrometry (GC-MS), characterization of microcapsule use FTIR and particle size analyzer, while analysis of essential oil content in the microcapsules with UV-Vis spectroscopy. Composition of MJP-D consist of citronellal (85,07%), lonalool (3,47%), citronelil acetate (2,77%) and sabinene (2,79%), while MJP-KB consist of citronellal (20,91%), terpinen-4-ol (11,93%), a-pinene (21,44%) and limonene (12,59%). Microcapsul MJP-D and MJP-KB has a distinctive absorption crosslinking results on 1558 cm-1 (-C=N) and particle size 340,43-404,90 nm. The effectiveness microcapsulation of MJP-D and MJP-KB 37,5% and 86,88% with each zone of inhibition against Pseudomonas aeruginosa bacteria is 12,8 mm and 17,1 mm. Keywords: microcapsul, kaffir lime oil, antimicrobial P. aeruginosa

EFFECT OF ADDITION OF SODIUM BENZOATES IN GREEN SUGAR CANE JUICE (Saccharum Officinarum L.) ON THE APPLICATION PULSED ELECTRIC FIELD (PEF) CONTINUOUS SYSTEM Dina Wahyu Indriani; Sumardi Hadi Sumarlan; Nurul Dwi Hidayani; Arie Febrianto Mulyadi
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Non-thermal pasteurization process using Pulsed Electric Field (PEF) today has been used particularly in processed food products are easily contaminated. One cause contamination of processed products is the high number of microbes in the product example is a green cane juice (Saccarum officinarum) and thus require proper handling process is to conduct non-thermal pasteurization using Pulsed Electric Field (PEF) continuous system. This study aims to reduce the total number of microbes and it maintains the physical and chemical qualities of green cane juice. In this study also added sodium benzoate which serves to inhibit microbial growth and increase shelf life of cane juice. This study uses a Randomized Complete Block design (RCB) with 2 factors that PEF continuous voltage (20, 30 and 30 kV) and the addition of sodium benzoate concentrations (200, 400, and 600 ppm) with 2 replications. Best research results at a voltage of 40 kV and a concentration of 600 ppm sodium benzoate. In this combination had a mean number of total microbes of 4.15 x 106 cfu / ml, TPT at 12.9 ° brix, total cave of 11.61%, a viscosity of 5.5 cp, the color on the brightness value (L *) of 24.1, redness (a *) of 7.1 and yellowness (b *) of 7. The color of the green cane juice controls had no significant difference it showed that PEF continuous system is able to maintain the color of the green cane juice.Keywords: Continuous; Green Cane Juice; Pulsed Electric Field; Sodium Benzoate

EFFECT OF CHAMBER PRESSURE ON ELECTRICAL IMPEDANCE OF A LOW-FREQUENCY NITROGEN PLASMA IN A MEDIUM VACUUM REACTOR Dionysius Joseph Djoko Herry Santjojo
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

The character of a low-frequency nitrogen plasma in a medium vacuum reactor was studied by determining the effect of chamber pressure on the electrical impedance of the plasma. The system understudied was a mini capacitive plasma reactor utilizing 40 kHz generator. The pressure was varied from 0.4 – 4.7 torrs. Results of this work indicated that the pressure in the range significantly affects the electrical impedance. The increase of the chamber pressure decreased the capacitive reactance while increased the resistance. The capacitive plasma indicates the plasma was controlled by excitation and ionization process, while the resistive plasma exhibits complex reactions due to collisions.

ASSESSMENT OF THE IMPACTS OF LAND USE ON WATER QUALITY OF BRANTAS UPSTREAM , BATU CITY, INDONESIA Bambang Rahadi Widiatmono; Fajri Anugroho; Euis Elih Nurlaelih; Akhmad Adi Sulianto; Novia Lusiana
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Unsuitability land uses have significant impact on conditions of many river basins along line from upstream to downstream through the cities in Indonesia. Water of Brantas upstream running along line through Batu City from Bumiaji Sub-District to Junrejo Sub-District may show varied concentrations of contaminants. The objective studies are (i) to evaluate the land use at existing-condition; (ii) to monitor the water quality parameters; (iii) to assess the water quality index and water pollution index of the Brantas upstream water. In this study, Pearson correlation of BOD and COD shown a very high positive correlations (r) of 0.8779. Meanwhile, high positive correlations were shown in TSS vs T-PO4 and T-NO3 vs T-PO4, whereas DO vs TDS, DO vs T-NO3, and DO vs T-PO4 have high negative correlations. Based on the four river water quality classifications in Indonesia, all stations shown the status of water pollution index at moderate level (Class I and II). Meanwhile, the water pollution index status of Class III were dominated by moderate level. In contrast, the status of water pollution index in Class IV was dominated by good level. Water pollution index in Category IV was relatively similar result to NSF-WQI status rather than other categories.Keyword: Brantas upstream watershed, land use, water pollution index, water quality parameters

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Contact Name
Renanda Baghaz Dzulhamdhani Surya Putra

Contact Email
jeest@ub.ac.id

Phone
+6285791322526

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jeest@ub.ac.id

Editorial Address
Direktorat Riset dan Pengabdian kepada Masyarakat (DRPM), Lantai 7, Universitas Brawijaya Jl. Veteran Malang, 65145, Jawa Timur, Indonesia

Location
Kota malang,

Jawa timur

INDONESIA

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Renanda Baghaz Dzulhamdhani Surya Putra

Contact Email jeest@ub.ac.id

Phone +6285791322526

Journal Mail Official jeest@ub.ac.id

Editorial Address Direktorat Riset dan Pengabdian kepada Masyarakat (DRPM), Lantai 7, Universitas Brawijaya Jl. Veteran Malang, 65145, Jawa Timur, Indonesia

Location Kota malang, Jawa timur INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Renanda Baghaz Dzulhamdhani Surya Putra

Contact Email
jeest@ub.ac.id

Phone
+6285791322526

Journal Mail Official
jeest@ub.ac.id

Editorial Address
Direktorat Riset dan Pengabdian kepada Masyarakat (DRPM), Lantai 7, Universitas Brawijaya Jl. Veteran Malang, 65145, Jawa Timur, Indonesia

Location
Kota malang,

Jawa timur

INDONESIA