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Renanda Baghaz Dzulhamdhani Surya Putra
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Direktorat Riset dan Pengabdian kepada Masyarakat (DRPM), Lantai 7, Universitas Brawijaya Jl. Veteran Malang, 65145, Jawa Timur, Indonesia
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INDONESIA
Journal of Environmental Engineering and Sustainable Technology
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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OIL SPILL TRAJECTORY SIMULATION AND ENVIRONMENTAL SENSITIVITY INDEX MAPPING : A CASE STUDY OF TANJUNG PRIOK, JAKARTA Fuad, M. Arif Zainul
Journal of Environmental Engineering and Sustainable Technology Vol 8, No 2 (2021)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2021.008.02.4

Abstract

Potential oil spills can be sourced from ship collisions, offshore oil drilling leaks, or refueling activities between ships. Tanjung Priok Port, Jakarta as the busiest port in Indonesia has the possibility of an oil spill disaster. Fuel oil could pollute the environment both in coastal and marine areas. As an anticipatory step, it is necessary to carry out an oil spill modeling simulation for contingency planning. Oil spill modeling was carried out using GNOME software using wind and ocean currents data as universal movers that move oil in the waters. The scenario used in this study is a spill occurred in March, the spill occurred during refueling between ships as much as 1500 barrels. The simulation results show that dominant oil spreads to the east and northeast and can reach sensitive areas in less than 4 days. Environmental sensitivity index mapping is carried out in areas that are predicted to be affected by an oil spill using ESI guidance from IPIECA. ESI map  shows that the research area can be categorized into 5 categories from less sensitive (1B) to very sensitive (10A). Sensitive area is an intertidal area which is a habitat for mangroves and aquaculture.
MAPPING OF SACRED AREA FOR BIRD DIVERSITY IN WESTERN AREA OF MT. SEMERU Ipango, Rahmi; Hakim, Luchman
Journal of Environmental Engineering and Sustainable Technology Vol 8, No 2 (2021)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2021.008.02.5

Abstract

Danyangan is A proof traditional conservation created by local wisdom. Knowledge of bioculture provides a facts play a role in understanding the ecological processes that occur and providing an overview local efforts in protecting the environment. The village’s. Danyangan has the form of a collection of large trees marked by the presence of sacred fig trees (Ficus sp.). Moreover, the fig tree become a habitat for several species of birds. The canopy’s cover reserves water, insects, and fruits as food for birds and creates an interesting relation as a microhabitats.The location of this study was carried out in the administrative district of Malang district in Tumpang, East Java in the area of the district located in Gubugklakah, Kunci, Drigu, Poncokusomo, Puthuk, Pandansari, Jajang, and Aran-aran. Bird observation is carried out using the point count or IPA method.The study recorded 636 individuals consisting of 31 species, 21 families and 9 orders. The birds identified were dominated by Passeriformes as many as 11 families. Based on the results, shows all locations in the danyangan area dominated by detailed Swallow (Collocalia linchii). Instead, The value of bird species abundance in all study locations is included in the high category of values ranging >4.
BIOLOGICAL ASPECTS OF FOURFINGER THREADFIN, ELEUTHERONEMA TETRADACTYLUM (SHAW, 1804) CAUGHT IN LEKOK WATERS, PASURUAN, EAST JAVA Lelono, Tri Djoko; Tumulyadi, Agus; Sari, Wahida Kartika; Ismaningsih, Indri Sari
Journal of Environmental Engineering and Sustainable Technology Vol 8, No 2 (2021)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2021.008.02.1

Abstract

Fourfinger threadfin Eleutheronema tetradactylum has a local name, namely laosan fish by the coastal community of Lekok Pasuruan District, a type of demersal fish that can swim in brackish waters. This research aimed to determine the biological aspects, namely the relationship of Length to Weight, sex ratio, and to determine the feasibility of catching based on the measurement results of the length of the first caught (Lc) and the length of the gonads first ripened (Lm). This research was conducted based on catches during Januari - March 2020 for total samples of as much as 450 fish, based on the catch of gill nets. The result informed that the length and weight relationship was negative allometric. The sex ratio between male and female was 1.00: 0.00. During the study, no female gonads were found because the fourfinger threadfin had spawned protandrous hermaphrodites. The value of length at first maturity (Lm) and length at first capture (Lc) was 20.99 ± 0.13 cm and 24.66 ± 0.046 cm. Lc > Lm's value proves that the fish caught is dominant gonad ripe fish so that the fish is suitable for catching and the fishing gear used selectively.
HYBRID OF ADABOOST ALGORITHM AND NAÏVE BAYES CLASSIFIER ON SELECTION OF CONTRACEPTION METHODS Faridah, Nurul; Dewi, Candra; Soebroto, Arief Andy
Journal of Environmental Engineering and Sustainable Technology Vol 8, No 2 (2021)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2021.008.02.6

Abstract

Stunting is a growth failure in children. Stunting can be avoided by adjusting birth spacing or implementing a Family Planning program by using appropriate contraception. Therefore, it is necessary to develop appropriate and rapid contraceptive selection techniques to assist family planning programs. This study develops a model for determining contraceptive methods using a Naïve Bayes Classifier. In addition, an Adaboost algorithm was used to handle the independent between attributes on Naïve Bayes. The performance evaluation of model was measured by combining k-fold cross validation and confusion matrix. Based on the results testing was obtained an optimal parameter of learning rate was 0.1 and the number of iterations was 50. The evaluation using optimal parameters produce the best accuracy of 87.5%, precision of 87.6%, recall of 87.5%, and f1-measure of 87.5%. This result was better than applying the Naïve Bayes without implementing Adaboost, which had 70% accuracy. The used of Adaboost was proven to increase the accuracy of Naive Bayes by 17.5%.
SHARE WAVE VELOCITY MODEL TO A DEPTH OF 30 METER (Vs30) USING HORIZONTAL VERTICAL TIME FREQUENCY ANALYSIS (HVTFA) METHOD Ridha, Syawaldin; Syafitri, Meta; Maryanto, Sukir; Martha, Agustya Adi
Journal of Environmental Engineering and Sustainable Technology Vol 9, No 01 (2022)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2022.009.01.1

Abstract

A share wave velocity model to a depth of 30 meter (vs30) can be used to find the type of the ground as a preventive action against earthquake disaster mitigation. Vs30 is obtained from the inversion of ellipticity curve using HVTFA method. HVTFA method is a method that can minimize the love curve in the ellipticity curve. Therefore, a more reliable share wave velocity can be obtained. It is necessary to find reliability of a model in a further research. The objectives of this research were to find the reliability of HVTFA and HVSR methods and determine the reliability of vs30 model from the result of inversion of Rayleigh-wave ellipticity curve using HVTFA method with duration of microtremor measurement of 0.5 hour, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours and 6 hours. Data used in this research were microtremor data. The microtremor data were processed using HVTFA and HVSR method in Geopsy software to find the ellicpticity curve. Next, the inversion of ellipticity was carried out in dinver software to obtain the share wave velocity model. After that, the error value from the model was calculated using vs%Miss, Boun%Miss, Ev, and Eb. The error value of HVTFA method still met the requirement of reliable model, but not the error value of HVSR method. The high error value in HVSR method was found in Bound%Miss and Eb. It meant that the share wave velocity of HVSR method had a high error value in the estimation of surface depth and thickness. Therefore, HVTFA method produced a more reliable vs30 model than HVSR method. In addition, the velocity model of HVTFA method from microtremor data with duration of 0.5 hour, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours and 6 hours also had reliable model. 
PRELIMINARY STUDY ON OXYGEN TRANSFER FOR LEACHATE WASTEWATER TREATMENT Septiariva, Iva Yenis; Suhardono, Sapta; Sari, Mega Mutiara; Suryawan, I Wayan Koko
Journal of Environmental Engineering and Sustainable Technology Vol 9, No 01 (2022)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2022.009.01.2

Abstract

Leachate is one of the results of the waste degradation process that can pollute the environment. Leachate is usually treated by biological processes, including aerobic processes that require sufficient oxygen. Oxygen transfer by aeration process is one way to consider gas transfer coefficient (KLa). This study aims to determine the gas KLa kinetics in leachate. This study used a chemical oxygen demand (COD) concentration limit of 100 mg/L. The oxygen flow rates used in this study were 1 L/minute and 1.5 L/minute. The main parameter measured in this study is dissolved oxygen (DO) which is measured by a DO meter every minute. The final DO in this study can be as high as 4 to 6 mg/L. The KLa values in this study show values at the flow of 1 and 1.5 L/min, respectively 0.0095/min and 0.017/min. These results also show that the detention time required for 1 and 1.5 L/min flow rates is 1.75 hours and 0.96 hours. This indicates that the greater the flow rate is given to the oxygen transfer process, the greater the flow rate the KLa value will increase. This will also affect the volume required for the oxygen transfer process. In addition, further research is needed with more diverse variations to further determine the appropriate detention time in leachate processing.
NUTRITION ESTIMATION OF LEFTOVER USING IMPROVED FOOD IMAGE SEGMENTATION AND CONTOUR BASED CALCULATION ALGORITHM Adinugroho, Sigit; Sari, Yuita Arum; Maligan, Jaya Mahar; Sari, Kartika; Bihanda, Yusuf Gladiensyah; Nuraini, Nabila; Fatchurrahman, Danial
Journal of Environmental Engineering and Sustainable Technology Vol 9, No 01 (2022)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2022.009.01.5

Abstract

In pandemic conditions, awareness of keeping a healthy balance is necessary. One is considering food consumption and understanding its nutrition content to avert food waste. We have been developing a prototype to estimate the nutrition of leftover food, and the main problem lies in image segmentation. Therefore, we propose the Improved Food Image Segmentation (IFIS) and Contour Based Calculation (CBC) to measure the area of the segmented image instead of pixel-wise. First, the tray box image is acquired and broken down into compartments using an automated cropping algorithm. The first step of this proposed method is tray box image acquisition and dividing the compartment using an automatic cropping algorithm. Then each compartment is treated using IFIS, calculates the result of IFIS by CBC, measures the estimated leftover by Automatic Food Leftover Estimation (AFLE), and then predicts the nutritional content. The evaluation is applied by comparing the actual measurement from the Comstock method and leftover estimation by the proposed algorithm. The result shows that Root Square Means Error (RMSE) reaches 0.48 compared to the actual weighing scale and 96.67% accuracy compared to the Comstock method. Based on the results, the proposed algorithm is sufficient to be applied.
IN-VITRO INHIBITION TEST OF SINTRONG LEAVES (CRASSOCEPHALUM CREPIDIOIDES) CRUDE EXTRACT ON EDWARDSIELLA ICTALURI BACTERIA Nova, Jely; Suprastyani, Heny; Prajitno, Arief
Journal of Environmental Engineering and Sustainable Technology Vol 9, No 01 (2022)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2022.009.01.3

Abstract

Parasites, viruses, and bacteria contribute to the transmission of infectious diseases. Catfish Enteric Septicemia (ESM) is caused by the bacterium Edwardsiella ictaluri. Antibiotics are used to treat this disease. However, the continuous use of antibiotics will lead to antibiotic resistance in fish and the contamination of the environment. Therefore, it is vital to have an alternative containing natural antibacterial components, such as Sintrong Leaf (Crassocephalum crepidioides). The composition of sintrong leaves consists of flavonoids, alkaloids, saponins, and tannins. This study employed an experimental method with a completely randomized design (CRD), which included five treatments and three replications. Treatment dosages of 25 ppm, 50 ppm, 75 ppm, 100 ppm, and 125 ppm were utilized along with the positive control (doxycycline) and negative control (without treatment). The investigation revealed that a crude extract of sintrong leaf exhibited an inhibitory effect that was effective against E. ictaluri bacteria. The equation pattern indicated y = -0.0004x2 + 0.0716x + 6.933 with an R2 coefficient of 0.71 showing a quadratic graph as the outcome. The graph results show that the best dose of crude extract from sintrong leaves against E. ictaluri bacteria is 89.5 ppm.
OPTIMIZATION OF BIOGAS PRODUCTION FROM TOFU WASTEWATER Purwanti, Ani; Muchlis, Muchlis; Arbintarso, Ellyawan Setyo; Rahayu, Suparni Setyowati; Gusmarwani, Sri Rahayu; Pangestu, Muhammad Puri Dwi; Prayogo, Wisnu
Journal of Environmental Engineering and Sustainable Technology Vol 9, No 01 (2022)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2022.009.01.4

Abstract

The Seyegan tofu industry has increased the output of tofu wastewater, which has not yet been put to good use. Biogas can be created by mixing wastewater from the tofu business with waste from the cow feces industry. In this study, we measure the time of fermentation, the composition variation, and the rate of increase in gas pressure from the biogas generation process. Three versions with three repetitions each were used in this investigation. Three different variations were tested: one with a ratio of 20% cow excrement and 80% wastewater tofu industry, one with a ratio of 35% cow feces and 65% wastewater tofu industry, and one with a ratio of 50% cow feces and 50% wastewater tofu industry. Using a biogas reactor consisting of 120 L plastic drums, the experiment was conducted. Gas pressure (mm) was monitored with a water column and fermentation duration using a digital timer (hours). To ascertain the viscosity variance of each variation composition, a level test was conducted. By using the gravimetric approach, water. According to the study's findings, a 2.5 mm water column containing a mixture of 50% cow feces and 50% wastewater from the tofu business had the maximum gas pressure. The ideal ratio of mixed materials within 7 days has a significant impact on optimal biogas production.
A PROPANOL GAS MEASUREMENT SYSTEM USING A QUARTZ CRYSTAL MICROBALANCE AS A MASS SENSOR Budianto, Arif
Journal of Environmental Engineering and Sustainable Technology Vol 9, No 02 (2022)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2022.009.02.4

Abstract

Propanol gas is an alcohol compound classified as a volatile organic compound (VOC). This gas can be classified as air pollution with a harmful impact on human health. There is an urgent need to minimize the health impact by mitigating propanol gas concentration. There is limited information about propanol gas measurement. Therefore, developing a propanol gas measurement device with high sensitivity and selectivity is necessary. Hence, this study developed a propanol gas concentration measurement system based on a bare quartz crystal microbalance. This crystal was placed inside an experimental chamber and exposed to propanol gas. The crystal frequency shift was measured using a frequency counter. The results show that the propanol gas concentration is linearly correlated to the frequency shift resulting in the crystal with a regression coefficient of R2 > 0.75). The system can measure propanol concentrations <1 μg.L-1 with a sensitivity of 5 Hz.mg.L-1. It can be concluded that a gravimetry-based measurement system using a quartz crystal microbalance has the potential to measure the concentration of propanol gas.

Page 11 of 16 | Total Record : 156

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