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Circular economy of bio compost from coffee waste to support sustainable development goals in alleviating poverty in communities around the Sidoarjo coffee industry

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IOP Conference Series: Earth and Environmental Science 2021年第1期802卷

作者： K A Bimantara S F N Alauddin N Amalia N F Widialip N Citrasari S Hariyanto Program Study of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Indonesia Program Study of Biology Department of Biology Faculty of Science and Technology Universitas Airlangga Indonesia

In 2016-2021, coffee consumption in Indonesia was predicted to increase by 120,000 tons, impacting the increase of coffee waste. Several large coffee industries in Indonesia are located in Taman District, Sidoarjo Regency. The character of the coffee skin waste contains 44.87% organic C; N of 1.69%; P of 0.18%; K 2.49%, and C / N ratio 10-14. This value indicates that the waste can be used as compost because it meets the criteria in SNI 19-7030-2004 concerning Compost from Organic Waste. This narrative review aims to determine the circular economy of bio compost from the coffee industry solid waste to support SDGs point 1 in alleviating poverty in communities around the Sidoarjo coffee industry. The research results showed bio compost I and II is the alternative product in the circular economy (W11). The coffee waste, coffee ground, coffee skin, and coffee returned collects waste in the circular economy (W10). The raw material composition of Bio compost I such as 1.5 kg coffee ground: 1.35 kg of coffee returned:0.15 kg coffee skin+3mL of EM4 and Bio compost II such as 4.6 kg SCG's:0. 4 kg coffee skin+5 ml EM4. In practice, the circular economy of bio compost I and II can involve Farmer Groups or Youth Organizations around the industry in Taman District, Sidoarjo Regency. Based on data 2020, the total members are 113 people, producing compost of 72,435.5 kg/month with a sales profit of IDR 36,217,750. This practice can support the first point of the SDGs, namely poverty alleviation for communities around the coffee industry. However, studies on the exact circular economy pattern of coffee waste in the Sidoarjo Regency are still needed.

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Impact of infrastructure development jalur jalan lintas selatan (jjls) in Yogyakarta to change in land price

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IOP Conference Series: Earth and Environmental Science 2021年第1期683卷

作者： H Edy M Baiquni B Triatmodjo Doctoral Student in Environmental Sciences Doctoral Study Program Postgraduate School of Universitas Gadjah Mada Lecturer in Doctoral Program in Environmental Sciences Postgraduate School of Universitas Gadjah Mada and Lecturer in Regional Development Study Program at the Faculty of Geography Universitas Gadjah Mada Lecturer in Doctoral Program in Environmental Sciences Postgraduate School of Universitas Gadjah Mada and Lecturer in Civil Engineering Study Program Faculty of Engineering Universitas Gadjah Mada

The Southern Trans-Java Route (Jalur Jalan Lintas Selatan – JJLS) infrastructure development is a national program that goes through five provinces in the island of Java, namely the provinces of East Java, Central Java, Yogyakarta Special Region, West Java, and Banten. In Yogyakarta, the Southern Trans-Java Route (JJLS) cuts across three regencies, which are Gunungkidul Regency, Bantul Regency, and Kulonprogo Regency. This research selected locations in Jetis Village, Saptosari District, Gunungkidul Regency, Gadingsari Village, Sanden District, Bantul Regency, and Sindutan Village, Temon District, Kulonprogro Regency for its study. The aims of this research are to analyze price changes that occur. The research method employed in this study is the qualitative descriptive analysis method. The villages set as study locations were determined by purposive method and data collection was conducted through in-depth interviews with informants who understand the issues relevant to the research objectives. Based on the acquired study results, the highest change in land price took place in Sindutan Village. A significant increase in land price occurred.

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Monitoring System for Organic Fertilizer Plant Controller Using Solar Energy

Monitoring System for Organic Fertilizer Plant Controller Us...

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International Conference on Science and Innovated engineering 2018, i-COSINE 2018

作者： Mardiyanto, Arief Syamsul Azhar Electronics Study Program Faculty of Electrical Engineering Politeknik Negeri Lhokseumawe Jln. B.Aceh Medan Km.280 Buketrata24301 Indonesia

In this applied research, a solar energy powered process control monitoring system of inorganic fertilizer plant with capacity of 300 liters has been developed. The process control system consists of PLC with solar energy panel as its power source and a monitoring process system. The monitoring process system includes a Raspberry Pi minicomputer, an LCD touchscreen, level shifter converters, Arduino Nano, RS485 modules, four analog sensors, and one digital sensor. This system works by collecting temperature, humidity, and gas concentrations data and controlling the heater, exhaust fan, and aerator to maintain desired processing ***-22 digital sensor measures temperature and humidity, pH probe analog sensor measures pH values, MQ-4, MQ-7 and MiCS-2714 measures methane, carbon monoxide, and nitrogen dioxide gases respectively. Analog output sensor is read by PLC's analog to digital converter while digital output sensor is read by 1-wire bus by Arduino. The collected data is send over RS485 to Raspberry Pi. The plant temperature is set constant at 40°C. The heater is turned on at temperature of ≤ 38°C, when temperature reach ≤ 42°C the aerator, exhaust fan, and mixer will be on and will be switched off all together at 40°C. The temperature, humidity and PH are set as the reference of the control process. © Published under licence by IOP Publishing Ltd.

关键词： Solar energy

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Spatial distribution of soil water content in potato horizontal-ridge profile under various ridge dimensions 2

Spatial distribution of soil water content in potato horizon...

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2nd International Conference on Life and Applied Sciences for Sustainable Rural Development, ICLAS-SURE 2019

作者： Wijaya, Krissandi Hari Kuncoro, Purwoko Ardiansyah Arsil, Poppy Ary Ani, Hilda Study Program of Agricultural Engineering Department of Agricultural Technology Faculty of Agriculture Jenderal Soedirman University Jl. Dr. Soeparno Karangwangkal Purwokerto53123 Indonesia

Vertical (slopping)-ridge is generally applied to cultivate potato crop in tropical highland area with intensive use of non-organic fertilizer, by which the soil erosion as well as environmental degradation might be significantly accelerated. On the other hand, horizontal (contour)-ridge has been very effective to reduce the soil erosion in potato cropping field, but yet slightly ineffective to support the optimal crop production, due to the waterlogging in the ridge profile. Dimension of the horizontal-ridge is expected to affect water distribution as well as the waterlogged condition, on which a specific study need to be focused, in order to develop an appropriate drainage system on the ridge. This study was aimed to characterize the spatial distribution of soil water in the horizontal-ridge profile under various ridge dimensions. Totally 9-potato-plots of 300 x 300 cm2 with 5% slope were prepared in Serang village, Purbalingga with various dimensions and replications of the horizontal ridges: 30 x 30 x 30 cm3 (G30), 30 x 40 x 30 cm3 (G40), and 30 x 50 x 30 cm3 (G50). Of each plot, the dielectrically (volumetric)-water content of the horizontal-ridge soil within the grid of 80 x 80 cm2 at the depth of 5, 10, and 20 cm were measured every months using EC5 moisture sensors and EM50 data logger, and then averaged. Based on the given grid, the data were plotted in contour pattern and were then analysed using semivariogram (Gstat and GNUplot) to characterize the spatial distribution and variability, respectively. The results showed that the spatial distribution of dielectrically (volumetric)-water contents tended to be inter-correlated within each ridge dimension, and the data were increased with soil depth and ridge dimension increment. Accordingly, the data were spatially-correlated with sill (C, semivariance) ranged from 0.00084-0.00429 cm3 cm-3 and range of influence (a) ranged from 0.624-2.809 m, in which the G50 had most representative and stable trend of the spa

关键词： Crops

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Thermomagnetic anomalies in quantum magnon transport caused by tunable junction geometries in cold atomic systems

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Physical Review A 2025年第3期111卷 033312-033312页

作者： Yuta Sekino Yuya Ominato Hiroyuki Tajima Shun Uchino Mamoru Matsuo Interdisciplinary Theoretical and Mathematical Sciences Program RIKEN Wako Saitama 351-0198 Japan Nonequilibrium Quantum Statistical Mechanics RIKEN Hakubi Research Team RIKEN Cluster for Pioneering Research Wako Saitama 351-0198 Japan Waseda Institute for Advanced Study Waseda University Shinjuku-ku Tokyo 169-0051 Japan Department of Physics School of Science The University of Tokyo Tokyo 113-0033 Japan Faculty of Science and Engineering Waseda University Tokyo 169-8555 Japan Kavli Institute for Theoretical Sciences University of Chinese Academy of Sciences Beijing 100190 China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100190 China Advanced Science Research Center Japan Atomic Energy Agency Tokai 319-1195 Japan RIKEN Center for Emergent Matter Science Wako Saitama 351-0198 Japan

We study magnon-driven spin and heat transport in a magnetic linear junction (MLJ) formed by two ferromagnets in optical lattices linked via linearly aligned bonds. Using the Schwinger-Keldysh formalism, we uncover that under weak effective Zeeman fields, where Bose-Einstein statistics of magnons dominate, magnonic criticality dramatically enhances spin and thermal conductances. These singular transport properties depend on the junction geometry, and the transport properties qualitatively differ between the linear junction in this paper and the point contact in our previous work. The quantum-enhanced conductances result in the breakdown of the magnonic Wiedemann-Franz (WF) law. In the classical regime at temperatures much lower than magnon energy gaps, we find that a magnonic Lorenz number becomes independent of temperature yet dependent on junction geometry, sharply contrasting with the universal WF law for Fermi liquids. We also find that the interface geometry of the MLJ decouples spin and heat relaxations between ferromagnets with decay times insensitive to temperature and effective Zeeman fields. These dynamics reveal junction-geometry-sensitive magnon transport distinct from Fermi liquids, paving the way for new avenues in thermomagnetic research leveraging the tunability of cold atomic systems.

关键词： Fermi liquids

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Assasment of flood hazard reduction in DKI Jakarta: Bendungan Hilir Village

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IOP Conference Series: Earth and Environmental Science 2022年第1期989卷

作者： S R Taufik M Yatrib A N Harman T N A Kesuma D Saputra M S B Kusuma Water Resource Mangement Master Program Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jawa Barat Indonesia Water Resources Engineering Research Group Institut Teknologi Bandung Jawa Barat Indonesia

Jakarta has an essential function for Indonesia, apart from being the capital city of the country, Jakarta is also the center of the nation's economy. However, the problem of flooding that occurs every year causes enormous material and immaterial losses. One of the metropolitan areas that is often hit by floods is Bendungan Hilir Village. This village is the meeting point between the Ciliwung River and the Krukut River. One of the causes of flooding is when the water level in both rivers is high, the water from the Krukut River cannot flow, so it overflows into the surrounding area. For this reason, this study will analyze the level of flood hazard and the effect of normalization of the Krukut River. The analysis was performed using the HEC-RAS, combining 1D and 2D modeling. In the upstream part, the Krukut watershed flood hydrograph is applied for a return period of 25 years with a peak discharge of 169 m3/s, and the normal depth will be used as the downstream boundary. The modeling is carried out in two conditions, they are the existing channel and the channel after normalization. Based on the model results it is found that normalization could reduce the flood hazard of Krukut river around 75%.

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Preparation of Superhydrophobic Zinc Oxide Nanorods Coating on Stainless Steel Via Chemical Bath Deposition 1

Preparation of Superhydrophobic Zinc Oxide Nanorods Coating ...

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1st International Conference on Design and Application of engineering Materials 2018, IC-DAEM 2018 in conjunction with 11th Seminar Nasional Metalurgi dan Material, SENAMM 2018

作者： Nuruddin, Ahmad Yuliarto, Brian Kurniasih, Santi Setiyanto, Henry Ramelan, Aditianto Engineering Physics Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung40132 Indonesia Analytical Chemistry Research Group Faculty of Mathematics and Sciences Institut Teknologi Bandung Bandung40132 Indonesia Materials Engineering Study Program Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Jalan Ganesha 10 Bandung40132 Indonesia

The stearic acid modified zinc oxide nanorod surface was coated with a stainless steel substrate to improve the contact angle and the sliding angle. Facilitated through ZnO seeding on the substrate, the ZnO nanorod was deposited via chemical bath deposition at different precursor concentrations. The surface hydrophobicity was modified by varying concentrations of stearic acid at and submmersion time. The contact angle was investigated in relation to the surface microstructure and modification. Results indicate that the density of ZnO nanorods on the substrate surface and stearic acid coverage are prerequisites for improving surface hydrophobicity. Superhydrophobic properties with a contact angle of 162° was obtained for ZnO deposited with 35 mM zinc nitrate and submerged in 8 mM stearic acid for 36 h, which allowed 5 μL water droplets to slide at 3.8°. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Stainless steel

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The addition of nutmeg (Myristica fragrans) essential oil to intensify the aroma as a replacement of rum considering halal supply chain for cookies that use durian (Durio zibethinus) seeds waste-based flour to create sustainable advantages

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IOP Conference Series: Earth and Environmental Science 2022年第1期956卷

作者： Z Mahyiddin Indani L Suhairi Z Ulya Z Munanda Department of PKK Teacher Training and Education Faculty Universitas Syiah Kuala Banda Aceh 23111 Indonesia Master Program of Global Supply Chain and Operations Management Berlin School of Economics and Law Berlin 10825 Germany Chemical Engineering Study Program Engineering Faculty Universitas Syiah Kuala Banda Aceh 23111 Indonesia

The sources of aroma can be varied according to the food's type and it is part of the ingredients that has an important role to increase people interest in certain foods. However, the most popular source of aroma is rum which is not halal for Muslim community. In this research, the researcher wanted to see the effect of adding essential oil from nutmeg seeds to the addition of the aroma of cookies made from durian seed flour to see the acceptance of customers of the product innovation using nutmeg essential oil to increase the aroma of cookies or food products that usually using rum or non-halal products and seeing the long-term impact that could possibly create sustainability advantages by occupying the waste of durian seed in to flour to substitute wheat flour. This study uses an organoleptic test. The science that uses the human senses to measure the texture, appearance, aroma, and taste of a food product is called sensory or organoleptic evaluation. Assessment of appearance, taste, and texture describes consumer acceptance of a product. The results show that consumers acceptance for this product innovation well so that the control prescription that can be given for this product innovation can be continued. The second experiment got the highest response compared to the first and third experiments.

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Expanded Diameter of Coronary Metal Stent: Simulation and Experiment 2

Expanded Diameter of Coronary Metal Stent: Simulation and Ex...

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2nd International Conference on Bioinformatics, Biotechnology and Biomedical engineering - Bioinformatics and Biomedical engineering, BioMIC 2019

作者： Tontowi, Alva Edy Ramadhani, Ogy Satria Sukiman Dewi, Nurul Aulia Taufiq, Nahar Universitas Gadjah Mada Department of Mechanical and Industrial Engineering Yogyakarta55281 Indonesia Universitas Khairun Department of Mechanical Ternate97719 Indonesia Faculty of Engineering Department of Mechanical and Industrial Engineering Yogyakarta55281 Indonesia Universitas Gadjah Mada Biomedical Engineering Biotechnology Program Study Yogyakarta55281 Indonesia

ISBN: (纸本)9781728147116

Information of expanded-diameter of stent provided by manufacturer is important for cardiologists and required during percutaneous coronary intervention (PCI) procedure. The expanded diameter of the stent is experimentally obtained by inflating a balloon catheter at a certain pressure, from normal to burst pressures. For stent manufacturer view in which stent mass production was taken place, testing of huge number of stent by experiment would be costly and it would be less expensive by simulation. The aims of the present work therefore would investigate the correlation of inflated pressures to expanded diameters which would be done by simulation or numerical and experiment. Numerical work has been performed by software ABAQUS and experiment has been done by using hydraulic inflated device. Stent model was open cell type made of stainless steel 316. The inflated pressures of 0.8, 1.2 and 1.6 MPa were applied to both numerical and experiment works. Results on numerical and experimental show that expanded diameter increases proportionally to the increase of inflated pressures. However, at the inflated pressure of 0.8 MPa, there was significant gap between the outer diameter obtained by numerical and experiment. Numerical result depicted over estimate to that of experiment. The inflated pressure window for having inflated diameter of 4mm to 4.5mm was 0.8 to 1.1 MPa. Although, numerically the stent has been fractured due to the von Mises stress was already over the ultimate stress of the material, in fact there was no evident depicted by SEM image. © 2019 IEEE.

关键词： Stents

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Utilization of Spirulina platensis microalgae as edible coating to maintain quality of fresh strawberry (Fragaria sp.)

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AIP Conference Proceedings 2021年第1期2344卷

作者： Prayoga Byantara Dianursanti 1Bioprocess Engineering Study Program Department of Chemical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia

The fruit is an important element of daily food but undergoes rapid deterioration due to their high metabolic activity. The edible coating on fruit is one alternative that can be used to improve quality and prolong shelf life. The edible coating can come from microalgae with high protein content, which is Spirulina platensis. Other materials needed are glycerol as a plasticizer to increase flexibility and elasticity and surfactant, which is carboxymethyl cellulose (CMC) as a thickener, stabilizer, and emulsifier. Strawberry (Fragaria sp.) was a sample fruit in this study. The condition of storage temperature is at the fridge temperature of about ± 4-7 °C. This study aims to obtain the appropriate microalgae concentration as the main ingredient in making edible coating to prolong strawberry’s shelf life. In this study, what varied are the concentration of S. platensis microalgae, which are 0,5%, 0,75%, and 1% (w/v). There are three tests carried out: protein quantification on edible coating solution, physical properties (weight loss), and chemical properties (pH and vitamin C) on fruit. Based on this study, an edible coating that has the best effect on strawberries is 1% S. platensis with lower weight loss, pH level, and higher vitamin C content up to seven days of storage. With higher protein content, the use of 1% S. platensis with the temperature of ± 4-7 °C achieved the lowest weight loss at 5.21 ± 0.09%, the lowest pH value at 3.29 ± 0.06, and the highest vitamin C content at 37.51 ± 0.78 mg/100g in strawberries in the seventh day of storage.

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