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Effect of the number of Cyperus rotundus and medium height on the performance of batch-constructed wetland in treating aquaculture effluent

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Chemosphere 2024年 353卷 141595页

作者： Imron, Muhammad Fauzul Hestianingsi, Wa Ode Ayu Putranto, Trisnadi Widyaleksono Catur Citrasari, Nita Abdullah, Siti Rozaimah Sheikh Hasan, Hassimi Abu Kurniawan, Setyo Budi Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Campus C UNAIR Jalan Mulyorejo Surabaya60115 Indonesia Department of Water Management Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 CN Delft 2628 Netherlands Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Bangi Selangor 43600 Malaysia Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Bangi Selangor 43600 Malaysia Laboratory of Algal Biotechnology Centre Algatech Institute of Microbiology of the Czech Academy of Sciences Opatovický mlýn Novohradská 237 Třeboň379 81 Czech Republic

Increasing aquaculture cultivation produces large quantities of wastewater. If not handled properly, it can have negative impacts on the environment. Constructed wetlands (CWs) are one of the phytoremediation methods that can be applied to treat aquaculture effluent. This research was aimed at determining the performance of Cyperus rotundus in removing COD, BOD, TSS, turbidity, ammonia, nitrate, nitrite, and phosphate from the batch CW system. Treatment was carried out for 30 days with variations in the number of plants (10, 15, and 20) and variations in media height (10, 12, and 14 cm). The result showed that aquaculture effluent contains high levels of organic compounds and nutrients, and C. rotundus can grow and thrive in 100% of aquaculture effluent. Besides that, the use of C. rotundus in CWs with the effect of numbers of plants and media height showed performance of COD, BOD, TSS, turbidity, ammonia, nitrate, nitrite, and phosphate with 70, 79, 90, 96, 64, 82, 92, and 48% of removal efficacy, respectively. There was no negative impact observed on C. rotundus growth after exposure to aquaculture effluent, as indicated by the increase in wet weight, dry weight, and growth rate when compared to the control. Thus, adding aquaculture effluent to CWs planted with C. rotundus supports the growth and development of plants while also performing phytoremediation. © 2024 Elsevier Ltd

关键词： Wetlands

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Rolling-Shutter Sensor-Based Visible Light Communication with Cross-Screen Filter: Communication and Positioning System Using a Commercial Camera 10

Rolling-Shutter Sensor-Based Visible Light Communication wit...

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10th IEEE Global Conference on Consumer Electronics, GCCE 2021

作者： Hamagami, Ritsuki Ebihara, Tadashi Wakatsuki, Naoto Maeda, Yuka Mizutani, Koichi University of Tsukuba Master's Program In Intelligent And Mechanical Interaction Systems Tsukuba Japan Faculty of Engineering Information And Systems University of Tsukuba Tsukuba Japan

ISBN: (纸本)9781665436762

We propose a visible light communication system using a commercial camera that achieves communication and positioning simultaneously, which is essential for intelligent transport systems (ITS). The transmitter (Tx) emits the data as fast-blinking light of the LED. The receiver (Rx) captures the signal using a rolling-shutter sensor with a cross-screen filter. Different from the previous system without a cross-screen filter, which can only achieve short-range and single-user communication, the proposed system can achieve long-range communication by diffusing the incoming light in a specific direction using a cross-screen filter. Furthermore, the proposed system has the potential to achieve multi-user communication and positioning, which used to require a high-speed camera, using a commercial camera. We evaluated the performance of the proposed system in indoor experiments. The experimental results suggest that the proposed system can improve communication range compared to the previous system. © 2021 IEEE.

关键词： Visible light communication

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mechanical properties of fly ash-based geopolymer concrete using variation in maximum size of coarse aggregate 1

Mechanical properties of fly ash-based geopolymer concrete u...

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1st International Conference on Innovation in Research, ICIIR 2018

作者： Patrisia, Y. Coenraad, R. Inderawan, N.A. Elidad, E. Study Program of Building Engineering Education University of Palangka Raya Palangka Raya Indonesia Study Program of Mechanical Engineering Education University of Palangka Raya Palangka Raya Indonesia

The aim of this research was to study the mechanical properties (compressive strength and splitting-tensile strength) of fly ash-based geopolymer concrete using variation in the maximum size of coarse aggregate. The mode of study was laboratory research. Fly ash obtained from Asam-Asam Steam Power Plant, South Kalimantan, Indonesia. The maximum size of coarse aggregate was 10 mm, 20 mm and 30 mm. The geopolymer concrete proportion divided into 3 different mixtures and each contained 400 kg/m3 of fly ash. The alkaline activator used as sodium silicate and 10M sodium hydroxide in the ratio 2:1. The ratio of alkaline activator to fly ash was 0.4. Cylindrical specimens (size 100 mm x 200 mm) counted 10 pieces for each mixture proportion and cured at ambient condition. The test result showed that average of compressive strengths and splitting-tensile strengths for specimens with 10 mm, 20 mm, and 30 mm maximum size of aggregate at the age of 21 days were 11.04 MPa and 6.12 MPa, 10.82 MPa and 5.22 MPa, 10.06 MPa and 4.84 MPa respectively. In conclusion, the greater the maximum size of coarse aggregate, the smaller the value of compressive strength and splitting-tensile strength. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Fly ash

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Used cooking oil catalytic cracking using Cr-charcoal ion-exchanged catalyst 6

Used cooking oil catalytic cracking using Cr-charcoal ion-ex...

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6th International Conference on Mathematics, Science, and Education, ICMSE 2019

作者： Nazarudin Ulyarti Alfernando, O. Fitri, S. Chemistry Engineering Study Program Faculty of Engineering Universitas Jambi Indonesia Chemistry Education Study Program Faculty of Teacher Training and Education Universitas Jambi Indonesia Center of Energy and Nanomaterial Study Universitas Jambi Indonesia

Used cooking oil is the largest waste that can be converted into biofuel as a renewable alternative energy source with catalytic cracking process. In this study, used cooking oil was cracked using a Cr-Carbon catalyst. The charcoal was produced from solid waste (shell) of oil palm industry. Three different chromium concentrations (1, 2, and 3%) were used for the ion-exchange process of Cr-charcoal to produce the catalyst. These catalysts were used for the catalytic cracking of used cooking oil at three levels of temperature (450, 500, and 550°C). X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were used for catalyst characterization. SEM-energy dispersive X-ray spectroscopy (EDX) analysis indicates that Cr was successfully adsorbed into the catalyst. The highest oil fraction was obtained from catalytic cracking of used cooking oil at 450°C using Cr-charcoal catalyst synthesized using 1% Cr solution. © Published under licence by IOP Publishing Ltd.

关键词： Catalysts

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The treatment of Raw Water Sources of Drinking Water using Chitosan/Mg/Al-LDH Composites: Problem cases in Municipal Waterworks in Banjarmasin

The treatment of Raw Water Sources of Drinking Water using C...

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Joint International Conference on Civil, Environmental, and Geo engineering 2019, JIC-CEGE 2019

作者： Irawan, C. Ramadhan, M.W. Nata, I.F. Putra, M.D. Chemical Engineering Study Program Engineering Faculty Lambung Mangkurat University Banjarbaru South Kalimantan Indonesia

A study was done on treatment of raw water sources for drinking water using chitosan/Mg-Al LDH (CS/Mg/Al-LDH) composites by adsorption process. An analysis on the adsorbent characterizations of FTIR, SEM and XRF showed that the CS/Mg/Al-LDH had many different functional groups and a high specific surface area for adsorption processes. The CS/Mg/Al-LDH showed high adsorption uptake capacity and selectivity for iron (Fe), turbidity, and colour in the raw water sources for drinking water in Municipal Waterworks in Banjarmasin. Therefore, the CS/Mg/Al-LDH composites have the potential to be used as an adsorbent in water and wastewater treatment. © Published under licence by IOP Publishing Ltd.

关键词： Potable water

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The Use of Geogebra Software in Learning Geometry Transformation to Improve Students' Mathematical Understanding Ability 2

The Use of Geogebra Software in Learning Geometry Transforma...

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2nd International Conference on Computer, Science, engineering, and Technology, ICComSET 2019

作者： Ridha, Moch. Rasyid Pramiarsih, Euis Eka Widjajani Mathematic Study Program Faculty of Teacher Training and Education Universitas Langlangbuana Bandung Indonesia Economic Education Study Program Faculty of Teacher Training and Education Universitas Langlangbuana Bandung Indonesia Industrial Engineering Study Program Faculty of Engineering Universitas Langlangbuana Bandung Indonesia

This article reports the findings of one pretest-posttest design experiment with the control group and with GeoGebra software learning application to examine the mathematical understanding abilities and responses of students taking Geometry Transformation course. The subjects of this study were 24 students of mathematics education study program in Universitas Langlangbuana. The research instrument consisted of a mathematical comprehension ability test and a student response questionnaire. Based on data analysis using SPSS 2.0.0 and Microsoft Excel 2013, the study found that achievement and improvement in mathematical understanding skills and responses of students who received learning with GeoGebra software were better than achievement and improvement in student's ability who obtain conventional approach for the high, middle and low categories. The study also found a moderate relationship between mathematical understanding ability and student response. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Students

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Application of VLAB-Based STEM in the Direct Circuit Electricity Section 2

Application of VLAB-Based STEM in the Direct Circuit Electri...

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2nd International Conference on Computer, Science, engineering, and Technology, ICComSET 2019

作者： Rachmat, A. Jannati, E.D. Susandi, D. Kaniawati, I. Siahaan, P. Mechanical Engineering Study Program Universitas Majalengka Indonesia Industry Engineering Study Program Universitas Majalengka Indonesia Department of Physics Education Universitas Pendidikan Indonesia Bandung Indonesia

Our research aims to determine the results of student responses after applying VLAB-based STEM learning in the direct current electric circuit section. This study uses a qualitative method. Sampling using a purposive sampling technique. The sample consisted of 13 students of mechanical engineering study program at Universitas Majalengka. The sample consisted of 13 students of mechanical engineering study program at Universitas Majalengka.. Data collection techniques using student questionnaire responses. The results of the questionnaire were analyzed descriptively. Most students respond like VLAB-based STEM, the stages of learning provide learning experiences for students so students are motivated in learning. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Students

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Development of Color Detection Based on Camera Infrared Filter with Python Image Processing

Development of Color Detection Based on Camera Infrared Filt...

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Student Conference on Research and Development (SCOReD)

作者： Joshu Leonardy Nawal Zuhdaniel Aflah Mohd Rashidi Bin Salim Mohd Haniff Bin Ibrahim Hadi Bin Manap Wildan Panji Tresna Faculty of Electrical Engineering Universiti Teknologi Malaysia JohorBahru Malaysia Military Physics Study Program The Republic of Indonesia Defense University Bogor Indonesia Faculty of Electrical & Electronic Engineering Technology University Malaysia Pahang Al Sultan Abdullah Pekan Malaysia Research Center for Photonics National Research and Inovation Agency Indonesia South Tangerang Indonesia

ISBN: (数字)9798331510077

ISBN: (纸本)9798331510084

This research explores the use of a modified infrared (IR) camera equipped with a high-pass filter to distinguish between natural objects (vegetation) and artificial objects (synthetic military uniforms) in an environment where vegetation makes objects difficult to detect. In military operations, especially guerrilla warfare in tropical forests, detecting enemies camouflaged in vegetation makes it difficult to distinguish targeted objects. Visible light cameras usually struggle to distinguish between synthetic and natural colors. This methodology involves the use of Python programming and various libraries, such as Computer Vision (CV), to process images captured by modified cameras. A graphical user interface (GUI) was developed to analyze color values, focusing on the red, green, and blue spectra. The results show that the modified IR camera can more effectively separate synthetic and natural object color peaks compared to a standard visible light camera, offering potential applications in military reconnaissance and sniper operations. This research demonstrates how image processing can improve object detection in complex environments.

关键词： Image color analysis Vegetation mapping Object detection Reconnaissance programming Cameras Standards Research and development Graphical user interfaces Python

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Techno-Economic Analysis of Bioethanol Production from Sugarcane Bagasse in Indonesia

SSRN

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SSRN 2023年

作者： Aditiya, H.B. Riayatsyah, Teuku Meurah Indra Chitra, I.S.N. Ong, Hwai Chyuan Silitonga, A.S. Mahlia, T.M. Indra Department of Mechanical Engineering Faculty of Engineering Sampoerna University Jakarta Indonesia Sampoerna University Energy Research Center Pancoran Jakarta Selatan12780 Indonesia School of Civil & Environmental Engineering University of Technology Sydney 81 Broadway UltimoNSW2007 Australia Department of Mechanical Engineering National Yunlin University of Science and Technology Touliu Yunlin64002 Taiwan Program Study of Mechanical Engineering Department of Production and Industrial Technology Institut Teknologi Sumatera South Lampung 3536 Indonesia Future Technology Research Center College of Engineering National Yunlin University of Science and Technology Douliou Yunlin64002 Taiwan Centre for Technology in Water and Wastewater School of Civil and Environmental Engineering Faculty of Engineering and Information Technology University of Technology SydneyNSW2007 Australia Center of Renewable Energy Department of Mechanical Engineering Politeknik Negeri Medan Medan20155 Indonesia

The studies of bioethanol production are being intensively explored over the past years in the provision of biofuel. This has been long recognized as the best alternative for a renewable energy resource to overcome the problem of the depletion of fossil resources. Indonesia's main agricultural sector, sugarcane industry, has shown promise in supplying sugarcane bagasse (SCB) as a feedstock for the second generation of bioethanol production. In this study, the techno-economic analysis of the sugarcane bagasse from the bioethanol production plant was explored, and the viability of bioethanol production based on the biomass generated from a local sugarcane factory was evaluated. All the costs that will be incurred during a 20-year operating period for a 203 ktons bioethanol production plant from SCB is $231 million, with a payback period of 6.19 years. The potential amount of bioethanol produced from SCB of this plant is 30.19 ML/year with the production cost (levelized cost of bioethanol, LCOB) of $0.59 per liter of ethanol produced. Overall, SCB bioethanol still carries better competitiveness at lower selling price in comparison with the latest price regulation by the Indonesian government ($0.85/L). © 2023, The Authors. All rights reserved.

关键词： Life cycle

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Design of sustainable green supply chain management using house of risk

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AIP Conference Proceedings 2024年第1期2952卷

作者： Lolyka Dewi Indrasari Ana Komari Afiff Yudha Tripariyanto Heribertus Budi Santosa Eko Siswanto Pamadya Vitasmoro Johan Alfian Pradana Venus Khatta Salsabilah Industrial Engineering Study Program Faculty Engineering Universitas Kadiri Kediri Indonesia

The continued role of the green management supply chain has become a parameter of the company’s sustainability. The role that is realized is to provide effectiveness in terms of reducing risks arising from the supply chain. Risks that arise deserve to be identified by the achievement of reducing supply chain risks that occur. The purpose of this study is to model the risks of green supply chain management using the house of risk method. This method as an integration of FMEA-QFD. The product used as a case is snail chips from PT. QRP. Due to the ineffective supply chain, various risks arise where this risk in addition to harming the company also harms the snail material supply vendors. Identification of risks by occurrence and risk agents totaling 22 types. The findings serve as a basis for constructing potential risks modeled with a causal diagram. It was found that the highest case parameter was that there was poor communication with long responses, one of which was. As a result of this case, the prevention action indicator can be clearly known with consideration of 6M (man, machine, material, measurement, method and mother nature). That the preventive action relationship with 6M can create a green supply chain design according to existing conditions. The virtues of the design formed are considering 6M supported by the role of ISO.

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