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All Journal G-Tech : Jurnal Teknologi Terapan
Rachmad Ramadhan Yogaswara
Universitas Pembangunan Nasional “Veteran” Jawa Timur, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering

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Pemanfaatan Kulit Buah Naga Merah Sebagai Bahan Baku Pembuatan Glukosa Cair dengan Proses Hidrolisis Enzimatis Awildan El Fath; Naufal Alkautsar Maulana; Rachmad Ramadhan Yogaswara
G-Tech: Jurnal Teknologi Terapan Vol 8 No 4 (2024): G-Tech, Vol. 8 No. 4 Oktober 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/gtech.v8i4.5151

Abstract

Red dragon fruit skin contains many beneficial nutrients. The carbohydrate composition of dragon fruit skin includes 11.5% of the whole, with details of lignin 37.18%, cellulose 9.25%, starch 11.07%, pectin 10.79%. This study aims to understand the effect of enzyme concentration used, namely α-amylase and β-amylase enzymes and also the effect of hydrolysis time, on the glucose content produced. The method used is a hydrolysis method that utilizes enzymes, namely the enzymatic hydrolysis method. The variables determined were the concentration of enzymes used and the length of time the hydrolysis was carried out. The process was carried out by mixing the solution with α-amylase and β-amylase enzymes into a glass beaker using various enzyme variations and hydrolysis times. Both variables were run in a waterbath at 65℃ and the pH of the solution was pH 5-6. The best condition was obtained at (1%:5%) α-amylase and β-amylase concentratiom  and 5 days of hydrolysis time with 62.2% glucose content, 37.15% water content and 0.25% ash content.
Reduction of Cu and Cr Metal Content in Electroplating Industrial Liquid Waste Using the Ion Exchange Method Tsabitah Nabilah Khairunnisa; Yesi Nabila Zahro Herazi; Rachmad Ramadhan Yogaswara; Mu’tasim Billah; Nurul Widji Triana
G-Tech: Jurnal Teknologi Terapan Vol 9 No 3 (2025): G-Tech, Vol. 9 No. 3 July 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i3.7374

Abstract

Electroplating industrial waste contains toxic chemicals that pose risks to health and environment, especially if they enter household wastewater systems. Therefore, treatment is necessary to reduce heavy metal content using the ion exchange method. This study utilized Amberlite IR 120Na resin as the ion exchange medium in electroplating waste. This study aims to reduce metal content in electroplating industrial wastewater using the ion exchange method by evaluating the effects of resin height and flow rate. The process was conducted with variations in flow rate (100 ml/min, 200 ml/min, 300 ml/min, 400 ml/min, 500 ml/min) and resin height (3 cm, 6 cm, 9 cm, 12 cm, 15 cm). The waste was passed through the ion exchange column, and the remaining Cu and Cr metal concentrations were measured. The results indicated that the optimal conditions occurred at a flow rate of 100 ml/min and a resin height of 15 cm, achieving a reduction of Cu metal by 90.16% and Cr metal by 83.36%. The Cu concentration after the process met quality standards under all conditions, while the Cr concentration met quality standards at resin heights of 12 cm and 15 cm. The ion exchange method proved effective in reducing heavy metal pollution.
Co-Authors Awildan El Fath Mu’tasim Billah Naufal Alkautsar Maulana Nurul Widji Triana Tsabitah Nabilah Khairunnisa Yesi Nabila Zahro Herazi