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Endosulfan insecticide removal planning with bioaugmentation-landfarming bioremediation method

IOP Conference Series: Earth and Environmental Science 2021年第1期894卷

作者： A Pipit Ratnaningsih A Rinanti Environmental Engineering Study Program Faculty of Landscape Architecture and Environmental Technology Universitas Trisakti Jakarta Indonesia

Endosulfan is a toxic organochlorine insecticide and is persistent in the environment. Endosulfan residue can be accumulated underground and lower soil quality, pollute water sources, and create bioaugmentation. This research aims to gather required information and study the potential of bacteria consortium consists of Bordetella sp., Bordetella petrii, and Achromobactery xylosoxidans to remediate endosulfan polluted soil. Bioremediation on laboratory scale conducted in a soil reactor, the pH level of 7, 20% humidity, and adjusted temperature to field temperature. Endosulfan was added into a reactor with a concentration of 2mg/g. The bacteria consortium utilized endosulfan as a nutrient source to decently grow up until this research was finished on the 30th day. Maximum removal occurred on upper layer soil with 99% of alpha-endosulfan and beta-endosulfan removal rates. Pilot-scale removal can be implemented with landfarming bioremediation. Two (2) processing beds were prepared with 15m of length, 7.5m of width, and 0.5m of height. This method was able to remove 99% of endosulfan in just 457.75 hours. This research can be implemented to remediate endosulfan polluted soil through the bioremediation method by utilizing bacteria consortium.

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Multi-parameter prediction of oil palm fruit quality through near infrared spectroscopy combined with chemometric analysis

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Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy 2025年 343卷 126505页

作者： Nanda, Muhammad Achirul Amaru, Kharistya Rosalinda, S. Novianty, Inna Park, Tusan Department of Agricultural and Biosystem Engineering Faculty of Agro-Industrial Technology Universitas Padjadjaran Sumedang45363 Indonesia Computer Engineering Technology Study Program College of Vocational Studies IPB University Bogor16680 Indonesia Department of Smart Bio-Industrial Mechanical Engineering Kyungpook National University Daegu41566 Korea Republic of Department of Applied Biosciences Kyungpook National University Daegu41566 Korea Republic of Smart Agriculture Innovation Center Kyungpook National University Daegu41566 Korea Republic of

Early information concerning water, oil, and free fatty acid (FFA) content in palm fruit on-site is crucial in determining the commercial value of fresh fruit bunches (FFB) and maintaining oil palm quality. Conventional methods are destructive, labor-intensive, single-target, costly, and time-consuming. Therefore, this study aimed to develop a method for the multi-parameter prediction of oil palm fruit quality using near-infrared (NIR) spectroscopy. Empirical Wavelet Transform (EWT) and Gaussian Process Regression (GPR) were implemented as a novel chemometric method. A total of 750 fruit samples of the Tenera variety (Elaeis guineensis Jacq. var. tenera) with various maturity levels were collected from the Cikabayan Oil Palm Plantation. Each sample was scanned using an NIR instrument at 1000–1500 nm wavelengths to obtain absorbance data. The EWT was applied to decompose the NIR spectra into empirical modes, and GPR was used to build a regression model for fitting. Based on numerical analysis, the combination of EWT and GPR produced the root mean square error (RMSE) values of 2.877 ± 0.900 % (R2 = 0.955 ± 0.018), 1.256 ± 0.543 % (R2 = 0.942 ± 0.030), and 0.065 ± 0.04 % (R2 = 0.964 ± 0.044) for water, oil, and FFA content, respectively. The results showed that the model could accurately predict the internal quality of oil palm fruit without the need for solvents or reagents, supporting environmental sustainability. These were expected to enhance oil palm production management by improving quality control, optimizing harvest timing, and promoting sustainability across the value chain. © 2025 Elsevier B.V.

关键词： Near infrared spectroscopy

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The kinetics of Fe2+ heavy metal adsorption by microalgae Desmodesmus sp. beads

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IOP Conference Series: Earth and Environmental Science 2021年第1期894卷

作者： D A Widyaningrum A Rinanti R Hadisoebroto Environmental Engineering Study Program Faculty of Landscape Architecture and Environmental Technology Universitas Trisakti Jakarta Indonesia

Industrial waste that contains high concentration of iron heavy metal (Fe2+) needs to be reduced into a safer limit for water ecosystem using an environmental-friendly, sustainable and low cost technology. This literature study was aimed to gather information on Fe2+ metal ion removal with biosorption method by mobilized beads-shaped Desmodesmus sp. green microalgae. Biosorbent beads are made of Desmodesmus sp. green microalgae powder binded with Na-alginate polymer. Desmodesmus sp. microalgae were cultivated in an Erlenmeyer flask with wastewater contains Fe2+ and Beijerinck growth media controlled in batch system. Analysis was conducted to study the influence of pH, size, beads, beads concentration, and Na-alginate concentration towards Fe2+ heavy metal removal efficiency on biosorption process. Research results revealed that Fe2+ heavy metal was effectively adsorbed by 1 mm beads up until 46% at maximum capacity on pH level of 6. These beads contain 8% gr/L of microalgae powder and 9% gr/L of Na-alginate. The involved function groups in Fe2+ sorption and the beads biosorbent morphology changes were analyzed by using FTIR and SEM. This biosorption research was following by analysis of Freundlich isotherm and reaction kinetics order two with linear approach. This was to shows the beads possess adsorption kinetics with optimum Fe2+ absorption capacity. Desmodesmus sp. beads are highly potential to be used as biosorbent since the heavy metal removal process was selectively conducted on wide pH level and temperature ranges, fast adsorption kinetics, and low operational cost. The smaller the beads size the wider the surface area, which leads to higher removal efficiency rate.

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The comparison of optimum heuristic and deterministic scheduling rules for job shop scheduling in the manufacture 8

The comparison of optimum heuristic and deterministic schedu...

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8th Annual International Conference 2018 on Science and engineering, AIC-SE 2018

作者： Fradinata, E. Kesuma, Z.M. Industrial Engineering Department Syiah Kuala University Banda Aceh Indonesia Statistics Study Program Faculty of Mathematics and Natural Science Syiah Kuala University Banda Aceh Indonesia

There are some types of scheduling problems in the production line of manufacturing. One of the most multiple usages of the operational machine for doing some jobs is job shop scheduling. The implementation of the job shop problem in this study uses the input of random order of eight job numbers. The raw materials for the job numbers to do the process and the five type machines are considered. The machines work in different functions to do the jobs for some materials. The materials have processed the work in process (WIP) before they are sent to the warehouse. The proposed of this study is to find the optimal condition of job shop scheduling heuristic and deterministic rules to minimize the makespan, tardiness with the heuristic and some deterministic rules in the Lekin software. The heuristic methods are General SBRoutine and the DASH (shifting bottleneck). The deterministic use Critical Ratio (CR) Rule, First come First Serve Rule (FCFS), Longest Processing Time (LPT), Shortest Processing Time (SPT), Weighted Shortest Processing Time (WSPT) and Machine Sequence (MS). The result shows that the minimum makespan is FCFS method with 47 minutes, the tardiness is 27, and for the machine no3. It produces the effective percentage of The contras deviation performance among the jobs of DASH, and compare to the FCFS is as follow, DASH, LPT, MS, SPT, WSPT are increasing 4.26%;31,91%;8.51%;4.26% and 12.77% respectively. © Published under licence by IOP Publishing Ltd.

关键词： Job shop scheduling

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Identification of changes in the morphological space structure of Bandar Lampung City using overlay geographic information system analysis

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IOP Conference Series: Earth and Environmental Science 2021年第1期739卷

作者： A B Ghazi H A Fitra Citra Persada Urban and Regional Planning Study Program Department of Infrastructure and Regional Technology Institut Teknologi Sumatera Architecture Study Program Department of Architecture Faculty of Engineering University of Lampung

Cities are developing due to population growth, socio-economic structure changes, technology and spatial interaction with its surroundings. 'Bagian Wilayah Kota (BWK) C' or so-called 'urban zone C' of Bandar Lampung municipality comprising districts of Sukarame, Tanjung Senang, and Way Halim is currently growing both internally and externally due to the development of Trans-Sumatera highway and Institute Teknologi Sumatera (ITERA). The dynamics of development and activities have caused a growing physical urban space, affecting the changes of urban structure directly. The current development in BWK C has been considered as unmanageable and potentially caused some problems in spatial plan in the future. To prevent the chaotic of spatial plan in the future, this study aims to identify the changes of urban structure in BWK C of Bandar Lampung municipality due to the internal and external development of its area. This study benefits in providing comprehensive standpoints about the process of urban structure changes based on urban activities so that city government could gain a systematic discourse of urban development which advantages in policymaking for spatial development in Bandar Lampung municipality in the future. This study conducted several analytical methods ranging from comparative analysis, spatial analysis, and hierarchical centrality index analysis. For data collection, this study applied secondary data survey and field work observation, using data from 2010 to 2016. The findings of this study reveal that the physical development in BWK C is getting compacted as its morphology changed from ribbon shaped city to octopus shaped city.

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Revealing the potential of extracted Tamarindus indica seed as a biocoagulant for aquaculture wastewater treatment: Effect of solvent type, concentration, dose, and toxicity assessment

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Results in engineering 2025年 27卷

作者： Setyo Budi Kurniawan Azzahra Aulia Haya Thin Soedarti Eko Prasetyo Kuncoro Łukasz Sługocki Kacper Nowakowski Peer Mohamed Abdul Muhammad Fauzul Imron Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Bangi Selangor 43600 Malaysia Research Center for Environment and Clean Technology National Research and Innovation Agency (BRIN) Jakarta Pusat 10340 Indonesia Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Campus C UNAIR Jalan Mulyorejo Surabaya 60115 Indonesia Department of Biology Faculty of Science and Technology Universitas Airlangga Campus C UNAIR Jalan Mulyorejo Surabaya 60115 Indonesia Department of Hydrobiology Institute of Biology University of Szczecin Wąska 13 Szczecin 71-715 Poland Center of Molecular Biology and Biotechnology University of Szczecin Wąska 13 Szczecin 71-715 Poland Sanitary Engineering Section Department of Water Management Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 CN Delft 2628 The Netherlands

Aquaculture wastewater contains high levels of organic matter and nutrients, which can be harmful to aquatic life if discharged improperly into surface water bodies. Coagulation-flocculation is currently the best practice for treating aquaculture effluent with biocoagulants, offering an alternative to metal-based coagulants. This study aims to investigate the potential of Tamarindus indica seeds as a biocoagulant for treating aquaculture wastewater, focusing on the optimal solvent extraction, concentration, and dose. This study also examines the toxicity of biocoagulants to aquatic organisms. Coagulation-flocculation study was conducted under jar test experiment with NaCl, NaOH, and HCl used as solvents; concentration of 0-10 g/L; and doses of 1-5 % v/v under 120 rpm (rotation per minute) rapid mixing for 1 min, 20 rpm slow mixing for 20 mins, and 60 mins sedimentation time. A characterization study showed that NaCl-treated T. indica has a positive zeta potential charge, attributed to the presence of hydroxyl, carbonyl, and amide functional groups. Under this optimum condition (NaCl-extract, 6 g/L, and 4 % v/v), the biocoagulant achieved high removal (>50 %) of turbidity, TSS (total suspended solid), and ammonia and considerably good removal of other parameters (TN [total nitrogen], BOD 5 [biological oxygen demand], COD [chemical oxygen demand]). The toxicity test revealed that no mortality was observed at a concentration of 1 g/L, whereas 10 g/L resulted in a 100 % mortality rate after 24 hours of exposure. Further toxicity analysis is suggested to be conducted using treated final effluent (not directly using biocoagulant substances) to observe the direct impact of the treated wastewater if discharged into the water bodies.

关键词： Aquaculture Biocoagulant Coagulation Effluent Environmental pollution Flocculation

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The effect of varying quenching media on cooling time and microstructures of leaf spring steel AISI 5160

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AIP Conference Proceedings 2021年第1期2363卷

作者： Anton Sudiyanto Eko Pujiyulianto 1Metallurgical Engineering Department of Mining Engineering Faculty of Mineral Technology Universitas Pembangunan Nasional “Veteran” Yogyakarta 55283 Indonesia 2Mechanical Engineering Study Program Institut Teknologi Sumatera (ITERA) South Lampung Lampung 35365 Indonesia

The mechanical properties of the material is affected by the microstructure, and the microstructure is determined by the cooling time. This research aims to evaluate the effect of varying quenching media on cooling time and microstructures of leaf spring steel AISI 5160. The leaf spring steel AISI 5160 was heat-treated at 850 oC for 30 minutes and was cooled in the varying quenching media. The quenching media were oil, water, water 1 L + soap 10 g, water 1 L + soap 15 g, water 1 L + soap 25 g, water 1 L + urea 10 g, water 1 L + urea 15 g, water 1 L + urea 25 g sand, air, and furnace. The cooling times were calculated by newton's law of cooling and heating equation, the microstructures were observed by an optical light microscope, and the percentages of martensite and retained austenite in the material were calculated by Optimas software. The results show that the fastest cooling time is 20.20 s cooled in water 1 L + urea 25 gr, and the longest cooling time is 82800 s cooled in the furnace. The microstructures of the material were martensite and retained austenite when the materials are cooled in a water and oil base quenching media. The microstructures were ferrite and pearlite when the materials are cooled in air, sand, and the furnace. The lowest percentage of the martensite is 78.4 % cooled in oil quenching media, and the highest percentage of the martensite is 94.4 % cooled in water + urea 25 g.

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The influence of motorcycle behavior on saturation flow rate at signalized intersections with and without exclusive stopping space for motorcycle (ESSM)

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IOP Conference Series: Earth and Environmental Science 2021年第1期673卷

作者： I M Kariyana P A Suthanaya D M P Wedagama I M A Ariawan D Dissanayake Doctor of Engineering Study Program Udayana University Bali Department of Civil Engineering Faculty of Engineering Udayana University Bali School of Engineering Newcastle University Newcastle upon Tyne UK

Traffic in most developing nations is considered mixed or heterogeneous. Motorcycle and other vehicle's behavior at signalized intersections would not probably have a similar influence on intersection capacity and time of the traffic signals. In theory, the saturation flow rate is a basic parameter to estimate the intersection capacity and time of the traffic signals. This study, therefore, aims to analyze the influence of motorcycle behavior on the saturation flow rate at signalized intersections in Denpasar, Bali. Traffic flow data are observed at four signalized intersection approaches that have similar width and traffic characteristics. Two approaches have exclusive stopping space for motorcycles (ESSM) while the other two do not. The study results show that more than 50% of motorcycles tend to be distributed beside flow at signalized intersections with ESSM on either light or dense traffic flows. In contrast, at the signalized intersections without ESSM, motorcycles are found to be distributed inside flow during low traffic conditions, while distributed beside flow during dense traffic flow. Besides, the saturation flow rates of motorcycle inside flow are less than that of beside flow at signalized intersections both with and without ESSM. A new method to estimate saturation flow is proposed.

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The study of distribution of chicken manure fertilizer for papaya growth and production beneath unproductive palm oil

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IOP Conference Series: Earth and Environmental Science 2021年第1期637卷

作者： A T Maryani N M E Fathia F F Bahar Faculty of Agriculture Agronomy Study Program Jambi University Jambi Indonesia Faculty of Civil Engineering Jambi University Jambi Indonesia

The research was conducted in Naga Sari village, Muaro Jambi regency, from February 2020 to June 2020. The design applied was a group-randomized design with 2 treatment factors. The first factor was the California variety (V1) and ruby rise red variety (V2). The second factor was chicken manure distribution: without fertilizer distribution (P0), 50 g of (P1), 100 of (P2), 150 of (P3), and 200 of (P4). The result of this research showed that the distribution of 150 g has a real impact on the plant's height and stem diameter, and the number of fruits on 5 Months After Cultivating to 6 Months After Cultivating. Variety treatment doesn't have a real impact on the papaya observation parameter. The interaction among the varieties with a dose of chicken manure has a real impact on plant height, stem diameter, and a number of the leaf. Qualitative data from papaya varieties showed fruit color and taste experiment gets the real impact. The impact of papaya plants and chicken manure showed a good growth tendency on palm oil cultivated with ruby rise red papaya as the side plant. The organoleptic test shows that the variety of Ruby papaya is preferred.

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Development of solid waste of tofu industry immobilized on silica surface as adsorbent for the adsorption of Cd (II) using method of continuous flow column 1

Development of solid waste of tofu industry immobilized on s...

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1st International Conference on Science and Technology for Environmental Protection, ICSTEP 2018

作者： Darmokoesoemo, H. Kuncoro, E.P. Supriyanto, G. Manuhara, W. Wijaya, A.L. Department of Chemistry Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia Study Program of Environmental Engineering Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia Department of Biology Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia

The aim of this research is to determine the removal efficiency of Cd (II) based on the pH variation and the optimum pH on the batch method, the adsorbent height variation and flow rate in continuous flow column which using tofu solid waste industry which was immobilized silica as adsorbent, also to characterize and to identify functional groups of the absorbent using the FTIR analysis. The pH variation used was 2,3,4,5, and 6. Adsorbent height variation used was 2 cm and 4 cm. Then, variation of flow rate used was 5 ml/min and 10 ml/min. Determination of pH optimum was done using One-Way Anova analysis and continued with Duncan test and descriptive analysis based on the table and graphic. The analysis data of the removal efficiency of Cd (II) in continuous flow column was explained by the descriptive analysis. The pHPCZ was 8.4. The pH optimum was 6 with the removal efficiency 48.14%. The removal efficiency of Cd (II) in continuous flow column for the adsorbent height variation 2 cm and 4 cm which were 38,22% and 43,42% respectively. The removal efficiency of Cd (II) in continuous flow column for the flow rate 5ml/min and 10ml/min each by 38.22% and 39.01%. The result of FTIR analysis of the adsorbent conducted before the adsorption shown that there were functional groups of C=O (vibrate at 1651.07 cm-1), Si-O-Si (462.92 cm-1 and 1095.6 cm-1), O-H (3425.58 cm-1), and N-H (3749.62 cm-1). While, the result of the FTIR analysis after the adsorption shown that there were Si-O-Cd (956.72 cm-1) and Cd-N (412.78 cm-1). © 2019 IOP Publishing Ltd.

关键词： Adsorption

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