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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 10 Documents

Search results for , issue "Vol 4, No 2 (2017)" : 10 Documents clear

PROFIT EVALUATION OF MILKFISH DOWNSTREAM SUPPLY CHAIN FOR LOCAL MARKETS: SYSTEM DYNAMIC APPROACH Ishardita Pambudi Tama; Agustina Eunike; Rahmi Yuniarti; Sugiono Sugiono
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Milkfish is an aquaculture product and has a role in supporting food security and nutrition in Indonesia. The reliability of milkfish farming will be able to increase the income of small and medium-scale farmers. Milkfish farmers in SMEs level experience problem of declining prices in the period of oversupply in farming. Moreover, the profit earning by the farmers tend to decrease time to time. This research was mapping the structure of milkfish downstream supply chain using system dynamic simulation. The first step in mapping process was identifying the actors in the milkfish downstream supply chain. The next stage was defining activities and variables that affect supply chain milkfish profit. The activities and variables were used to develop a causal loop diagram (CLD). Furthermore, stock and flow diagram was constructed based on CLD and used as system dynamic simulator of milkfish supply chain. The result of system dynamic simulation showed the profit obtained by each actor in milkfish supply chain and a total profit of the entire supply chain. The profit, gained by supply chain in the current configuration, during the period 2016-2020, is Rp72.615.608.004,00. According to the simulation result, the proposed scenario will be able to increase the profit of supply chain up to 27,58%.

VARIOUS VEGETATION MODIFIES THE DIVERSITY OF HERPETOFAUNA IN WONOSOBO AGRICULTURAL LANDSCAPE Nia Kurniawan; Bagyo Yanuwiadi; Bagus Priambodo; Andri Maulidi; Agung Sih Kurnianto
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Human population growth has rapidly conversed the natural environment into agricultural and plantation area in Indonesia. This phenomenon resulted a reduction and fragmentation habitats, and led to the loss of biodiversity. By exploring Wonosobo, we were able to analyse the herpetofauna composition on three different habitat, including river, salak plantation [Salacca zalacca (Gaert.) Voss], and paddy fields. We identified 17 species (60,7%) from river, 15 species (53,6%) from paddy field, and 13 species (46,4%) from salak plantation. Shannon-wiener index diversity (H’) categorized herpetofauna diversity in all three habitats as medium. Meanwhile, the evenness index (E) showed that herpetofauna community in river classified as unstabile (E=0.7302). River was predicted be functioned as transit area for herpetofauna to hunt. There were no herpetofauna species predominating all three habitats, and this indicating that the ecosystem balance was well preserved. This study revealed that agriculture and plantation area affected the herpetofauna composition, yet it still able to maintain the diversity well. In addition, the water bodies, including river and irrigation in agriculture and plantation area, should be maintained its quality as it plays an important part in herpetofauna conservation. Keywords: fragmentation, herpetofauna composition, habitat

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.

ENZYMATIC SYNTHESIS OF CELLULOSE PROPIONATE AND ITS POTENCY AS RAW MATERIAL FOR MEMBRANE Anna Roosdiana; Diah Mardiana; Ellya Indahyanti; Dyah Ayu Oktavianie
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

ABSTRACT Modification of bacterial cellulose through enzymatic esterification between cellulose and propionic acid has been carried out to produce cellulose propionate as raw material of dialysis membrane. The research aimed to characterize of cellulose propionate and assess its potency as raw material for membrane. The esterification was performed for 8 hours at 50 ⁰C with cellulose and propionic acid in mass ratio of 1:5. The physical chemical properties of resulted cellulose propionate were determined for functional group using FTIR, crystallinity index by XRD, swelling index by gravimetric method, specific gravity, maximum pore size diameter and membrane thickness. The cellulose propionate showed peak absorbance at wave number of 1743 cm-1 from C=O absorption and 1108 cm-1 and 1037 cm-1 from C-O absorption with degree of crystallinity of 61.56% and density of 1.39 g/cm3. Cellulose propionate membrane has maximum poressize of 2.25 ± 0.04 µm and thickness of 0.029 ±0.001mm, the swelling index of 153%. Diffusion equilibrium of uric acid was 3 hours at average diffusion rate of 1.48ppm/h.Keywords : Bacterial cellulose, cellulose propionate, characteristic, diffusion rate

THE EFFECT OF FECL3 AND LENGTH OF INCUBATION ON THE DEGRADATION OF LIGNOCELLULOSE FROM SENGON AND PINE WOODS USING SERPULA LACRYMANS Irnia Nurika; Nur Hidayat; Nur Lailatul Rahma; Sakunda Anggarini
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

ABSTRACTThe aim of this research is to determine the effect of FeCl3 affected to lignocelullosic degradation of Sengon and Pine wood residue by Serpula lacrymans during incubation. which was showed by the changing value of Total Soluble Phenols (TSP), Total Reducing Sugar (TRS), weight loss and pH extract. The experimental design used is a Factorial Block Randomized Design with three factors: the type of wood (K) (Sengon and Pinewoods), the concentration of FeCl3 (M) selected are 10, 30 and 50 µM and length of incubation (T): 0, 7, 14, 21, 28 and 35 days. The results revealed that the addition of FeCl3 on both types of woods during incubation did not give a significant impact on the value of TSP, TRS, weight loss and pH. The best treatment in TSP production is Sengon wood was incubated for 28 days (0.064 mg/g). While the greatest amount of total reducing sugars is Pinewood, incubated for 28 days in the amount of 36.58 mg/g. The best in percentage of weight loss is Pinewood, incubated for 28 days contains 33,98% with pH extract 4.14Keywords: biodegradation, lignocelullose, total soluble phenols, total reducing sugar.

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.

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 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.

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