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All Journal JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI IJEMS (Indonesian Journal of Environmental Management and Sustainability)
Titisari Juwitaningtyas
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Energy Environmental Science Public Health

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Quality Analysis Of Low Quality Orthodox Black Tea At PT.Perkebunan Nusantara VIII Kebun Kertamanah Bandung, Jawa Barat Dinda Nofita Sari; Titisari Juwitaningtyas
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 10 No 3 (2022): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2022.v10.i03.p15

Abstract

The purpose of this research are (1) Find out the control limits of the implementation of quality control on PT.Perkebunan Nusantara VIII Kebun Kertamanah. (2) to determine the production of low quality black tea products under controlled conditions in PT.Perkebunan Nusantara VIII Kebun Kertamanah. (3) to determine the factors that cause low quality black tea products to not meet the standards in PT.Perkebunan Nusantara VIII Kebun Kertamanah. (4) to find out the percentage value of off grade low quality black tea in PT.Perkebunan Nusantara VIII Kebun Kertamanah. The basic method is descriptive with the implementation method is the case study. Data were analyzed using (1) check sheet (2) p chart (3) fishbone diagram. The results showed that (1) control limits of low quality black tea which are in the upper and lower control limits. (2) production of low quality black tea products under controlled conditions (3) factors that cause low quality black tea products to not meet standards (4) value Percentage off grade low quality black tea in PT.Perkebunan Nusantara VIII Kebun Kertamanah.
Analysis Of Tea Shoots Worth Processing (APLO) In The Raw Materials Of Orthodox Black Tea With Mechanical Picking Method At PT. Perkebunan Nusantara VIII Kebun Kertamanah Bandung, Jawa Barat AN-NISA IMANNIANTY; Titisari Juwitaningtyas
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 10 No 3 (2022): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2022.v10.i03.p11

Abstract

The aims of this study were (1) to identify the type and number of product defects in orthodox black tea raw materials at PT. Perkebunan Nusantara VIII Kebun Kertamanah (2) To find out the cause of defects in Orthodox Black Tea Raw Materials at PT. Nusantara VIII Plantation Kertamanah Plantation. The research method used is descriptive method with special study implementation methods. Data were analyzed using (1) analysis tables (2) Pareto diagrams (3) bar charts (4) cause-and-effect diagrams. The results obtained (1) the value of the percentage of tea shoots that are suitable for processing (2) the value of the percentage of shoots that do not meet the standards (3) the factors that cause the high percentage of shoots that do not meet the requirements at PT. Nusantara VIII Plantation Kertamanah Plantation
Evaluation of Stainless-Steel Mesh 304 Cathode Performance in a Microbial Fuel Cell for Tofu Wastewater Treatment Satar, Ibdal; Uswatun Khasanah; Titisari Juwitaningtyas; Edy Herianto Majlan; Waled Abdo Ahmed; Byung Hong Kim
Indonesian Journal of Environmental Management and Sustainability Vol. 9 No. 3 (2025): September
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2025.9.3.134-142

Abstract

Currently, tofu wastewater (TWW) is one of the major environmental issues that must be addressed. When discharged untreated TWW into natural water bodies or soil, it poses a serious threat to the environment. Therefore, effective treatment of TWW is crucial before to disposal. As an advanced bio-electrochemical technology, the microbial fuel cell (MFC) offers a promising approach to reduce pollutants while simultaneously generating electricity. However, the choice of cathode material is crucial for enhancing MFC performance. This study aims to evaluate the performance of an MFC using an SSM-304 cathode with TWW as the target substrate. Several characteristics of TWW including pH, chemical oxygen demand (COD), biological oxygen demand (BOD), total solids (TS), total dissolved solids (TDS), and total suspended solids (TSS), were analyzed before and after MFC treatment. Additionally, the performance of the MFC system was further evaluated based on voltage output (V), current density (J), coulombic efficiency (CE), and MFC efficiency (?MFC). The results show that COD and BOD were reduced by 69.56% and 64.00%, while TS, TDS, and TSS increased by 48.79%, 32.24%, and 45.15%, respectively. The MFC system with SSM-304 produced a voltage of 167 mV, a current density of 267.2 mA/m², a coulombic efficiency of 3.35%, power density of 27.89 mW, and MFC efficiency of 10.43%. Overall, this study demonstrated the potential of MFCs for simultaneous wastewater treatment and energy recovery.
Co-Authors AN-NISA IMANNIANTY Byung Hong Kim Dinda Nofita Sari Edy Herianto Majlan Hery Widijanto Satar, Ibdal Waled Abdo Ahmed