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All Journal Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis INTEK: Jurnal Penelitian Al-Ard: Jurnal Teknik Lingkungan Jurnal Ilmu Pengetahuan dan Teknologi (IPTEK) Journal of Bioresources and Environmental Sciences Journal of Bioresources and Environmental Sciences International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN
Linda Aliffia Yoshi, Linda Aliffia
Institut Teknologi Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Performance and Techno-Economic Analysis of Scaling-up A Single-Chamber Yeast Microbial Fuel Cell as Dissolved Oxygen Biosensor Christwardana, Marcelinus; Yoshi, Linda Aliffia
International Journal of Renewable Energy Development Vol 9, No 3 (2020): October 2020
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2020.29980

Abstract

The Microbial fuel cells (MFCs) are electrochemical devices that can be utilized as biosensors, specifically Dissolved Oxygen (DO) biosensors. In this research, performance and techno-economic of MFC-based DO biosensors with two sizes, small and large, were evaluated and analysed to determine whether it is more economical to use a small or large reactor. MFC-based DO biosensors were also applied to an irrigation canal. When MFC immersed into distilled water with several variations of DO, the correlation between DO and current density produced equation with R2 values around 0.9989 and 0.9979 for SYMFC and LYMFC, respectively. The power density for SYMFC and LYMFC was 3.48 and 10.89 mW/m2, respectively, in DO 6. Higher power densities are correlated with the electrode surface area, especially the larger cathodic surface area. When applied to the irrigation canal, DO values measured using SYMFC and LYMFC have errors of around 3.39 and 4.42%, respectively, when compared to DO values measured using DO meters. LYMFC requires a capital cost of around $ 234.22 or 2.57 times higher than SYMFC, although it generates almost similar cost per mW/m2, $ 21.51 and $ 26.23 for LYMFC and SYMFC, respectively. The results concluded that yeast MFC -based DO biosensors with smaller sizes can achieve more economical compared to larger sizes.
Outstanding Photo-bioelectrochemical Cell by Integrating TiO2 and Chlorophyll as Photo-bioanode for Sustainable Energy Generation Christwardana, Marcelinus; Septevani, Athanasia Amanda; Yoshi, Linda Aliffia
International Journal of Renewable Energy Development Vol 11, No 2 (2022): May 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.41722

Abstract

Photosynthesis is a technique for converting light energy into chemical energy that is both efficient and sustainable. Chlorophyll in energy-transducing photosynthetic organisms is unique because of their distinctive structure and composition. In photo-bioelectrochemical research, the chlorophyll's quantum trapping efficiency is attractive. Chlorophyll from Spirulina platensis is demonstrated to communicate directly with TiO2-modified Indium Thin Oxide (ITO) to generate electricity without the use of any mediator. TiO2-modified ITO with a chlorophyll concentration of 100 % generated the greatest power density and photocurrent of approximately 178.15 mW/m2 and 596.92 mA/m2 from water oxidation under light among all the other materials. While the sensitivity with light was 0.885 mA/m2.lux, and Jmax value was 1085 mA/m2. Furthermore, the power and photocurrent density as a function of chlorophyll content are studied. The polarizability and Van der Waals interaction of TiO2 and chlorophyll are crucial in enhancing electron transport in photo-bioelectrochemical systems. As a result, this anode structure has the potential to be improved and used to generate even more energy.
Energy Harvesting from Sugarcane Bagasse Juice using Yeast Microbial Fuel Cell Technology Marcelinus Christwardana; Linda Aliffia Yoshi; J. Joelianingsih
Reaktor Volume 21 No. 2 June 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (636.167 KB) | DOI: 10.14710/reaktor.21.2.52-58

Abstract

This study demonstrates the feasibility of producing bioelectricity utilizing yeast microbial fuel cell (MFC) technology with sugarcane bagasse juice as a substrate. Yeast Saccharomyces cerevisiae was employed as a bio-catalyst in the production of electrical energy. Sugarcane bagasse juice can be used as a substrate in MFC yeast because of its relatively high sugar content. When yeast was used as a biocatalyst, and Yeast Extract, Peptone, D-Glucose (YPD) Medium was used as a substrate in the MFC in the acclimatization process, current density increased over time to reach 171.43 mA/m2 in closed circuit voltage (CCV), maximum power density (MPD) reached 13.38 mW/m2 after 21 days of the acclimatization process. When using sugarcane bagasse juice as a substrate, MPD reached 6.44 mW/m2 with a sugar concentration of about 5230 ppm. Whereas the sensitivity, maximum current density (Jmax), and apparent Michaelis-Menten constant (????????????????????) from the Michaelis-Menten plot were 0.01474 mA/(m2.ppm), 263.76 mA/m2, and 13594 ppm, respectively. These results indicate that bioelectricity can be produced from sugarcane bagasse juice by Saccharomyces cerevisiae.Keywords: biomass valorization, biofuel cell, acclimatization, maximum power density, Michaelis-Menten constant
Studi Tekno Ekonomi Desalinasi Air Laut Skala Kecil Dengan Sistem Reverse Osmosis Linda Aliffia Yoshi; I Nyoman Widiasa
Reaktor Volume 16 No.4 Desember 2016
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (290.433 KB) | DOI: 10.14710/reaktor.16.4.218-224

Abstract

Penelitian ini bertujuan untuk mendapatkan desain dan keekonomian desalinasi air laut di Indonesia yang mempunyai suku bunga bank 12-14%, tarif listrik Rp 1.300-1.800 per kWh, dan pajak air bawah tanah. Penggunaan sistem desalinasi SWRO di Indonesia pada umumnya dibuat skala kecil. Studi ini berdasarkan studi kasus di Pulau Bali dengan tarif listrik adalah Rp 1.335,29/kWh dan pajak air bawah tanah adalah Rp 4.950/m3. Evaluasi tekno-ekonomi dianalisa untuk kapasitas 150-1000 m3/hari, recovery sistem 40% dengan salinitas air laut 32.000 ppm, suku bunga 13%, dan jangka waktu pinjaman 10 tahun. Harga jual air desalinasi pada tahun pertama 24,300/m3. Berdasarkan hasil evaluasi ekonomi yang meliputi NPV dan IRR  dapat disimpulkan bahwa investasi layak dilakukan.
Mathematical Modeling for Determination of Correlation Between Current Density and Dissolved Oxygen in Yeast Microbial Fuel Cell-Based Biosensor Marcelinus Christwardana; Linda Aliffia Yoshi
Reaktor Volume 20 No.3 September 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (339.949 KB) | DOI: 10.14710/reaktor.20.3.117-121

Abstract

Experiments were conducted to study the correlation between current density and dissolved oxygen (DO) and to develop a model for estimating the value of current density in yeast MFC based DO biosensors. A curve between current density and DO was made, and data analysis was performed using free-online data fitting, namely zunzun.com. One linear regression and nine different exponential models are used as an approach to determine the correlation between current density and DO. The higher DO, the current density will increase rapidly. The most suitable model was chosen to describe the correlation between the current density and the DO. The coefficient of determination (R2), the sum of square absolute (SSQABS), and root mean square error (RMSE) are used to determine goodness or quality of fit. The exponential model shows a better fit to illustrate the correlation between current density and DO, with R2, SSQABS, and RMSE values were 0.9975, 0.4745 and 0.3444, respectively.
TECHNO ECONOMY ANALYSIS A SMALL SCALE REVERSE OSMOSIS SYSTEM FOR BRACKISH WATER DESALINATION I Nyoman Widiasa; Linda Aliffia Yoshi
International Journal of Science and Engineering Vol 10, No 2 (2016)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (960.918 KB) | DOI: 10.12777/ijse.10.2.51-59

Abstract

This study aims to get the design process and the economics of small-scale desalination of brackish water in Indonesia which has interest in the range of 12-14%, electricity cost of  $0.09-0.13/kWh, and groundwater tax regulation. The use of BWRO desalination system in Indonesia has been generally done at small scale. This study based on Bali island with electricity cost at $0.1/kWh and water tax at $0.37/m3. Techo economy evaluation was analysed for plant capacity of 150-1,00 m3/day, recovery of 40% with brackish water water salinity of 5,000 ppm. Price of desalted water during first year a case study is $1.31/m3. It can be concluded that economic evaluation based on NPV and IRR shows that it is worthed.
Performance of Yeast Microbial Fuel Cell Integrated with Sugarcane Bagasse Fermentation for COD Reduction and Electricity Generation Marcelinus Christwardana; J. Joelianingsih; Linda Aliffia Yoshi
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 3 Year 2021 (September 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.3.9739.446-458

Abstract

The purpose of this analysis is to evaluate the efficiency of the Microbial Fuel Cell (MFC) system incorporated with the fermentation process, with the aim of reducing COD and generating electricity, using sugarcane bagasse extract as a substrate, in the presence and absence of sugarcane fibers. There is a possibility of turning bagasse extract into renewable bioenergy to promote the sustainability of the environment and energy. As a result, the integration of liquid fermentation (LF) with MFC has improved efficiency compared to semi-solid state fermentation (S-SSF). The maximum power generated was 14.88 mW/m2, with an average COD removal of 39.68% per cycle. The variation margin of the liquid fermentation pH readings remained slightly decrease, with a slight deflection of +0.14 occurring from 4.33. With the absence of bagasse fibers, biofilm can grow freely on the anode surface so that the transfer of electrons is fast and produces a relatively high current. Experimental data showed a positive potential after an effective integration of the LF and MFC systems in the handling of waste. The product is then simultaneously converted into electrical energy. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Pengaruh Keterbatasan Panjang Ruang terhadap Sistem Desain Desalinasi Reverse Osmosis pada Air Payau Kapasitas 500 m3/hari Linda Aliffia Yoshi
JURNAL ILMU PENGETAHUAN DAN TEKNOLOGI (IPTEK) Vol. 1 No. 2 (2017): Jurnal Ilmu Pengetahuan dan Teknologi (IPTEK)
Publisher : Institut Teknologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31543/jii.v1i2.121

Abstract

Aplikasi teknologi membran terutama membrane reverse osmosis lebih banyak digunakan untuk penyediaan air bersih. Sumber air yang layak dijadikan bahan baku adalah air payau dengan kandungan salinitas sekitar 1.000-10.000 ppm. Kelayakan dari pengolahan air payau lebih kepada sistem desain proses desalinasi. Tujuan dari penelitian ini untuk mengetahui pengaruh keterbatasan panjang ruang sistem desain desalinasi BWRO terhadap proses dan karakteristik produk yang dihasilkan. Penelitian disimulasikan menggunakan software CSM PRO 5,  kapasitas instalasi 500 m3/hari, dan recovery 75%.  Hasil penelitian menunjukkan bahwa terbatasnya panjang ruang, sistem desain dapat dirubah dari single stage ke double stage yang akan berdampak kepada besarnya tekanan High Pressure Pump (HPP) dan konsentrasi produk yang dihasilkan.
Upaya Penurunan Nilai COD Pada Limbah Tekstil Dan Batik Dengan Penambahan NaOCl Linda Aliffia Yoshi; Jessica Ambarwati Idat; Galuh Maulidyananda; Ratnawati
Al-Ard: Jurnal Teknik Lingkungan Vol. 6 No. 1 (2020): September
Publisher : Department of Environmental engineering, Faculty of Science and Technology, Islamic State University Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/alard.v6i1.954

Abstract

Batik and textile production produces liquid waste with a COD content above the environmental quality standard between 2,000-12,000 ppm. Efforts to reduce the value of COD are helped by the addition of NaOCl. This study aims to determine the pH and dose of NaOCl against COD reduction. Textile liquid waste used came from factory X while batik liquid waste came from factory Y; both factories are located in South Tangerang. In this study, the pH range, 5, 7, and 9 and NaOCl concentrations were added in 3000, 4000, and 5000 ppm. The study begins with the measurement of the actual COD value in the two wastewater. The best results for batik waste were obtained at pH 5 with the addition of 4000 ppm NaOCl which resulted in a decrease of 93%. Textile liquid waste shows the best results at pH 5 with an additional 5000 ppm NaOCl concentration which can reduce COD by 95%. The final result of the COD value has met the quality standard set by the government which is less than 250 ppm.
Evaluation of Total Hardness and Qualitative Analysis of Boiler Water at the Food Jam Industry, Tangerang, Indonesia Satrio Kuntolaksono; Imam Wicaksono; Febrianty Emilia; Enjarlis Enjarlis; Linda Aliffia Yoshi
Journal of Bioresources and Environmental Sciences Vol 1, No 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jbes.2022.15826

Abstract

Food industry is one of the most crucial and rapidly growing economic sectors in Indonesia. One of the examples is the food jam industry. This industry was located in Tangerang, Indonesia. The majority of the food jam industry uses its own source of water, so this part is also important to water producers in Indonesia. Water used in the food jam industry should meet the requirements of at least drinking water quality, so the factories need to treat the water. Good quality water is water that requires good physical, chemical, and bacteriology properties. Hard water is a term known for water that contains a high concentration of minerals such as Calcium (Ca) and Mag-nesium (Mg). Moreover, water with very high degrees of hardness is harmful to health. In this study, we want to evaluate and determine the pH, total hardness, and total dissolved solids (TDS) at three different times namely morning, midday, and afternoon. The results obtained in the range of pH analysis are 6.98 to 7.99 with all cover times. The total hardness in the boiler water and the TDS are around 252.6 to 388.2 mg/L and 310 to 406 mg/L, respectively. These results indicated that it has fulfilled the requirements for total hardness values under the Minister of Health Regulations (Permenkes) No. 492/Menkes/Per/IV/2010.
Co-Authors Agam Duma Kalista Wibowo Albana, Naufal Rozin Athanasia Amanda Septevani, Athanasia Amanda Daranova, Daranova E. Enjarlis Febrianty Emilia Fitria, Nadya Galuh Maulidyananda Handayani, Sri Hariansyah, Najwa I Nyoman Widiasa Imam Wicaksono Ismojo, Ismojo Jessica Ambarwati Idat Joelianingsih . Marcelinus Christwardana Nurhalizah, Fauziah Fitri Ratnawati Ratnawati Satrio Kuntolaksono Sri Handayani Surya Aji Wibawa