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All Journal Journal of Fundamentals and Applications of Chemical Engineering
Juliastuti, Sri Rachmania
Departement of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS-Keputih-Sukolilo, Surabaya, 60111, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering

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The Effect of Using Glucomannan Flour and Carageenan on The Manufacture of Jelly Candy Juliastuti, Sri Rachmania; Meliyati, Hartinah; Machmud, Glenn Mochamad Rayhan
Journal of Fundamentals and Applications of Chemical Engineering Vol 5, No 1 (2024)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2964710X.v5i1.18896

Abstract

Indonesia is one of the countries that produces porang tubers in the world The biggest benefit of cultivating porang plants is to obtain the tubers. The harvested porang tubers can be sliced or chipped and then dried. Porang slices or chips can then be processed into konjac flour or konyaku. From konjac flour, glucomannan can be obtained. The aim of this research is to make jelly candy from porang flour which will be purified first by an extraction process using ethanol. The research method used was to extract 70 g of porang flour using foodgrade ethanol with a concentration of 50% as much as 560 ml by stirring on a hotplate at 30 ℃, stirring speed of 600 rpm and stirring time ( 30 minutes, 60 minutes, 90 minutes) which will then be filtered to obtain porang flour precipitate then in the oven for 12 hours with a temperature of 90 ℃. From the research results, it was found that the best glucomannan content was at a stirring speed of 600 rpm for 60 minutes, namely 81,52 %. Then, the best results of glucomannan flour were applied by being used as an ingredient for making jelly candy added to carrageenan.
Effect of Sidoarjo Mud Inoculant and Bacillus subtilis on The Degradation of Tofu Liquid Waste in Microbial Fuel Cell Continuous Series Reactors Juliastuti, Sri Rachmania; Pramoryza, Michellia; Darmawan, Raden
Journal of Fundamentals and Applications of Chemical Engineering Vol 6, No 1 (2025)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2964710X.v6i1.22839

Abstract

The tofu industry in Indonesia generates large amounts of liquid waste with high BOD and COD, causing significant environmental impact. Microbial Fuel Cells (MFC) offer a sustainable solution for treating organic waste while generating electricity. Effective treatment of tofu liquid waste is essential. This study explores the use of Sidoarjo mud and Bacillus subtilis as inoculants in MFC systems, integrated with an advanced reactor design for improved degradation of pollutants. A Continuous Series Reactor was employed, equipped with an auto dosing pump for precise substrate feeding, optimizing microbial activity. The system was monitored using an Arduino Mega data logger and an ESP01 module for remote data transmission. The effectiveness of Sidoarjo mud and Bacillus subtilis was tested by measuring BOD, COD, and protein removal, with different inoculant combinations compared to a control group. The control group achieved BOD and COD removal rates of 70.43% and 47.92%, respectively. Sidoarjo mud alone improved these to 94.30% and 91.84%, while combining Sidoarjo mud with Bacillus subtilis increased removal rates to 94.70% and 92.55%. Protein degradation also improved by 79.79% with Bacillus subtilis. Sidoarjo mud and Bacillus subtilis effectively enhance waste degradation in MFC systems, providing a sustainable solution for tofu waste treatment.
Co-Authors Darmawan, Raden Machmud, Glenn Mochamad Rayhan Meliyati, Hartinah Pramoryza, Michellia