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    Effect of Handwashing During COVID-19 Pandemic to Domestic Water Estimation: Case Study in Banda Aceh City, Indonesia
    (2023-02-01)
    Devianti
    ;
    Syahrul
    ;
    Afriza, Ridhofa Hafira
    ;
    Sitorus, Agustami
    ;
    Thamren, Dewi Sartika
    New normal routines have continued to campaign since the COVID-19 pandemic broke out in 2019. One of these new habits is to keep washing your hands after every activity. Hand washing can be done using hand sanitizer or soap and washed in running water. As a result, the need for water to meet the habit of washing hands is expected to affect domestic water needs in a certain area. Therefore, this study aims to estimate the increase in domestic water demand during the COVID-19 pandemic caused by the new routine of washing hands in the research area in the city of Banda Aceh, Indonesia. In addition, this study will also estimate domestic water needs until 2030 if the COVID-19 pandemic has not ended. Innovations in this research can help increase efficiency in water use and help prevent the spread of disease. This study uses a sampling method in several places in Banda Aceh city to obtain data related to the volumetric water used, handwashing time, and frequency of handwashing. Besides, data in water discharge from water supply companies in Banda Aceh city from 2018 to 2020 was also collected. Finally, data on the population of Banda Aceh city was also collected. The information and data are then analyzed using a statistical approach between supply and demand. Although it appears that there is a projected increase in domestic water demand of 1.89% per year due to the COVID-19 pandemic from 2021 to 2030, this is still 41.48% greater than the ability of water supply companies in the city of Banda Aceh to meet domestic water needs up to 2030. In conclusion, if the pandemic continues until 2030, with the expected increase in population, the domestic water needs in Banda Aceh city will still be fulfilled.
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    Influence of Biopores Infiltration Holes on the Level Erosion in Oil Palm Plantations Area
    (2022-04-01)
    Devianti
    ;
    Irwansyah
    ;
    Yunus, Yuswar
    ;
    Arianti, Nunik Destria
    ;
    Thamren, Dewi Sartika
    The extension of oil palm plantations in Indonesia has encroached on land with a slope of more than 15%, which impacts the possibility of erosion and landslides. However, conservation efforts to reduce erosion are yet to be fully established. Therefore, the present work studies the effect of biopores infiltration holes on erosion at oil palm plantations area with land slopes greater than 15%. Besides, surface runoff with erosion is modeled to find the relationship. The method used in this study is to combine mechanical conservation methods in the form of biopores infiltration holes in an area that already has cover crops, such as Mucuna Bracteata. Two experimental plots were designed, namely (i) plots without biopores infiltration holes and (ii) plots with biopores infiltration holes. The results showed that soil erodibility in the oil palm plantations area was of a high of 0.65. Applying biopores infiltration holes in the field reduced surface runoff and erosion rates by 31.81% and 29.66%, respectively. The relationship of surface runoff with erosion rates on the land shows a very close case where the coefficient of determination in each plot is 0.96 and 0.92.
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    LOW COST TELEMONITORING TECHNOLOGY OF SEMISPHERICAL SOLAR DRYER FOR DRYING ARABICA COFFEE BEANS
    (2022-01-01)
    Pramono, Eko Kuncoro
    ;
    Karim, Mirwan Ardiansyah
    ;
    Fudholi, Ahmad
    ;
    Bulan, Ramayanty
    ;
    Lapcharoensuk, Ravipat
    This study focusses on the development of a low-cost Internet of Things (IoT) system for semispherical solar dryers to dry arabica coffee beans. The temperatures and relative humidity (Rh) of a solar dryer room are measured using a DHT22 sensor module. The moisture content of hard arabica coffee beans is calculated by measuring the mass of the dried product using the load cell sensor module. All detected data are then sent using wireless networks and saved on a database cloud server. Tests are conducted to evaluate the uniformity of the DHT22 sensor module in a semispherical solar dryer, measure the temperature and Rh and reduce the mass of the dried coffee beans. The performance of the DHT22 sensor module at the uniformity testing stage shows promising results in terms of temperature and Rh, with standard deviations of 0.46 and 3.55, respectively. In addition, the performance of the semispherical solar dryer in relation to the drying kinetics of arabica coffee beans is evaluated. Arabica coffee beans are dried from 49.59% (w.b.) to 10% (w.b.) moisture content within 69 h. In addition, the drying kinetics of coffee arabica beans are investigated. Three models are compared with experimental data on arabica coffee beans dried in a semispherical solar dryer. The Page model is selected to represent the thin layer drying behaviour of arabica coffee beans.