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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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ISOLATION AND PROFILLING OVIDUCT SPECIFICT GLYCOPROTEIN IN OVIDUCTAL FLUID OF KACANG GOAT (Capra aegagrus hircus) Herlina Pratiwi
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Frozen semen supplemented by Oviduct Specific Glycoprotein (OVGP) is a new way to solve the decrease of in vitro fertility on goats caused by polyspermy and to increase the efficiency of artificial insemination on goats. Oviduct Specific Glycoprotein has associated with zona pellucida and localized in perivitelline space. The existence of Oviduct Specific Glycoprotein in perivitelline space may be linked to a mechanism that blocks polyspermic through vitelin block. Oviduct Specific Glycoprotein can be found in the fluid that was secreted by the oviduct (oviductal fluid). This study was aimed to determine Oviduct Specific Glycoprotein profile in the oviductal fluid of Kacang goats Malang district, West Java Province, Indonesia. Oviduct Specific Glycoproteins were collected from an oviductal liquid of kacang goats and samples were loaded to 12% SDS-PAGE to determine the weight of the molecule of Oviduct Specific Glycoprotein, further confirmed by western blot. The result of this study showed that molecule weight of Oviduct Specific Glycoprotein been collected from oviductal liquid was approximately 55-65 kDa. After being confirmed by western blotting the molecule weight of Oviduct Specific Glycoprotein was 65 kDa.

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.

THE USE OF CITRIC ACID MODIFIED BACTERIAL CELULLOSE AS AN ENVIROMENTALLY FRIENDLY ADSORBENT Diah Mardiana; Ani Mulya Suryani; Budi Kamulyan; Nur Lailatul Rahma
Journal of Environmental Engineering and Sustainable Technology Vol 5, No 1 (2018)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

AbstractThe use of nata de coco as an ester cellulose raw material through esterification using various of carboxylic acids has been widely conducted. In this study, it was used citric acid with three carboxyl groups. This aim research were to determine the optimum reactant composition and to compare the cellulose citrate properties toward bacterial cellulose and commercial ester cellulose. Esterification at mass ratio of nata : citric acid were 1 : 1 up to 1 : 9 were conducting at temperature of 150oC. The optimum ester cellulose produced, were then characterized based on the FTIR spectrophotometry, hydrophobicity and degree of crystallinity. Furthermore, the surface area has been determined in order to find out its potency as an adsorbent .The result revealed that reaction using citric acid has affect on chemical structure and hydrophobicity. The increase of hydrophobicity and degree of crystallinity was influenced by citric acid added. On the other hand, it was obtained that cellulose citrate could be develop as an adsorbent.Keyword: cellulose, esterification, citric acid, adsorbent

EFFECT OF VENTURI DIAMETER OF CARBURETOR ON PERFORMANCE OF SIX-STROKE 125 CC COMBUSTION ENGINE Eko Siswanto; Agung Sugeng Widodo; Nurkholis Hamidy; Denny Widhiyanuriyawan; Gilang Rausan Fikri Noor
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Performance of six stroke single power combustion engine affected by venturi diameter of carburetor is presented. This study is to begin on development of six-stroke single power of combustion engine (CE). Developing of this six stroke CE is based on addition of duration on both mass- and thermal diffusion, and on mixing time before the combustion. Evaluation of the six-stroke CE performance is done via enlarge venturi diameter of carburetor. Selected venturi diameters are 18 (mm) and 20 (mm). Fuel of the CE is gasoline-based using research octane number (RON) of 92. Interval of each ascending rotation speed is 400 (rpm), and observation was done using a constant throttle aperture 30 (%). The observed performances of the 125 (cc) six-stroke CE is then compared using a convensional four-stroke 125 (cc), as well. It informs that diameter 20 (mm) can increase average of about 21(%) on torsion, 21 (%) on power, 16 (%) on specific fuel consumption (SFC), and 23 (%) on thermal efficiency to that of the diameter 18 (mm). If compared to four-stroke CE, the six-stroke CE has lower in SFC and thermal efficiency, however, it has higher in average value of torsion, power, and engine speed, respectively about 15 (%).

IDENTIFICATION OF PATCHOULI LEAVES QUALITY USING SELF ORGANIZING MAPS (SOM) ARTIFICIAL NEURAL NETWORK Kartika Purwandari; Candra Dewi; Imam Cholissodin
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

One of the essential oil export commodities from Indonesia is patchouli oil. However, the price of patchouli todays is unstable caused by the low quality of the oils, which has high levels of acid and lower alcohol content. One part of patchouli that is widely used to obtain essential oils is the leaf. The better quality of leaves will produce oil with grade quality. The quality of the leaves can be identified by its physical characteristics. Leaves that have a good quality are small leaves, thick and slightly yellowish red color. This identification process can be done visually, but, it will be easier if it can be done automatically using computer applications. Therefore, this paper performs automatic identification of leaves utilizing image of patchouli leaves and artificial neural network algorithm Self Organizing Maps (SOM). Identification was done to distinguish the leaves with good quality and poor. From the test results using the initial learning rate 0.1, 0.3 deduction learning rate, the minimum rate learning 0.0001, 40 training data and testing the data 60 obtained an average accuracy of 82.82%.

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.

AKTIVITAS ANTIOKSIDAN DAN ANTIMIKROBA MINYAK JERUK PURUT (Citrus hystrix DC.) DAN KOMPONEN UTAMANYA Warsito Warsito; Noorhamdani Noorhamdani; Sukardi Sukardi; Suratmo Suratmo
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Kaffir lime oil (C. hystrix DC.) is consist of a complex mixture of hydrocarbons terpenoids and terpenoids which contain oxygen are distributed in every part of the plant. In this research tested the antioxidant and antimicrobial activity, both against kaffir lime oil from twigs, leaves and rind including the main components citronellal. The antioxidant was evaluated by testing its ability to catch DPPH radical. Antimicrobial activity is measured by its ability to inhibit the growth of gram-negative bacteria, Escheria coli. Gas chromatography-mass spectrometry (GC-MS) is used to analyze chemical composition of kaffir lime oil. Value of IC50 of kaffir lime oil obtained was 6,43 (mL/mL); 6,83 (mL/mL); 9,48 (mL/mL) and 10,1 (mL/mL), consecutive to kaffir lime oil from rind, leaves, twig-leaf mixture and citronellal. Compared to the other kaffir lime oil and major components citronellal, kaffir lime oil from rind show the most vigorous activity in inhibiting growth of Escheria coli bacteria, by MIC values of 12,5 (mL/mL). GC-MS analysis showed that citronellal and citronellol as major component on kaffir lime oil from leaves and twig-leaf mixture, while the major component of kaffir lime oil from rind is b-pinene, limonene, citronellal dan terpinen-4-ol. Keywords: kaffir lime oil, citronellal, citronellol, antioxidant, antimicrobial

EXHAUST EMISSIONS OF 4 STROKE SPARK IGNITION ENGINE WITH INDIRECT INJECTION SYSTEM USING GASOLINE-ETHANOL FUEL Mega Nur Sasongko
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Gasohol can be replaced in the spark ignition engine (SI engine) as gasoline substitution having lower emissions exhaust gas, making it more environmentally friendly. The aim of study was to investigate the effect of gasoline- ethanol ratio on the gas exhaust emission of SI engine injection system. In this study, it was used the 4-stroke gasoline engine injection system by using the injector as a fuel input device. The engine had a 124.8 cc single-cylinder engine with compression ratio of 9.3:1. The variations of gasohol were gasohol E0, E10, E20, E30, E40, E50, E60, E70, E80, E90 and E100 with range of speeds; 1500 rpm, 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, 4000 rpm, 4500 rpm and 5000 rpm. The research was run by rearranging the standard ECU to obtain the AFR stoichiometric of each gasohol mixture. The exhaust emissions were measured by using the Stargas-898. The results show that the addition of ethanol content was able to increase the CO2 emissions , however, it would decrease the CO and HC levels. Compare to the gasoline fuel, gasohol has a lower emission of CO, HC and higher of CO2 and O2 emissions.

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Renanda Baghaz Dzulhamdhani Surya Putra

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jeest@ub.ac.id

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+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

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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