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Journal : Jurnal Pembelajaran dan Biologi Nukleus

Pasteurization Effects on the Microbial Ecology of Functional Tempeh Developed from Black Rice Bran and Dual Rhizopus Strains Safrida, Safrida; Budijanto, Slamet; Nuraida, Lilis; Priosoeryanto, Bambang Pontjo; Syam, Nasrianti
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 2: Jurnal Pembelajaran Dan Biologi Nukleus June 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i2.7483

Abstract

Background: Black rice bran has the potential to be a functional food raw material due to its high content of bioactive compounds; however, it is susceptible to microbial contamination. This study aims to evaluate the effect of pasteurization on the microbiological quality of fermented rice bran tempeh using Rhizopus oligosporus and Rhizopus oryzae. Methodology: The study employed a comparative experimental approach, where fermented for 72 hours with R. oligosporus and R. oryzae, grown in PDA medium, with the addition of spore suspensions at 15% each (10⁶ spores/mL). After fermentation, the bran was divided into two groups: one group was steamed for 10 minutes, while the other group was not steamed. Both groups were freeze-dried for 24 hours and then stored at -18 °C for analysis of changes in the profiles of total microbes, total fungi, total enterobacteria, and total spores. The raw material of rice bran was also analyzed microbiologically as a control. Microbiological data were analyzed using the Generalized Linear Model (GLM) and further evaluated by Duncan Multiple Range Test (DMRT) at a 5% significance level, as determined by SPSS 22.0 software. Findings: The results showed the pasteurization on bran tempeh products was effective in reducing the total number of microbes, moulds, Enterobacteriaceae, and spores compared to those without pasteurization. However, bran tempeh with R. oligosporus culture between pasteurized and unpasteurized did not show a significant decrease (p>0.05), except for the results of the analysis of the total number of moulds which showed a significant decrease (p<0.05), which was <1 log CFU/g (pasteurization) and 3.52 log CFU/g (without pasteurization). It can be concluded that the 10 minutes pasteurization process is effective in reducing the number of Enterobacteriaceae, which are indicators of polluting and pathogenic bacteria. Contribution: this treatment has potential to be applied on a home industry and Micro, Small and Medium Enterprises (MSME) scale to improve safety and extend the shelf life of fermented food products based on bran.
Co-Authors . Setiadjit . Sukarno A.A. Ketut Agung Cahyawan W Adnan Engelen Afwa Nururrahmah Munawaroh Agus Setiyono Aini Auliana Amar Alfi Khatib Amalia Hana Arifa Anas Subarnas Antin Suswantinah Anton Apriyantono Ardiansyah Ardiansyah, Ardiansyah Ari Andika Aris Purwanto Arya Suryadilaga Ati Atul Quddus Azis Boing Sitanggang Aziz Boing Sitanggang Azizah Tsaniya Fasya Bambang Pontjo Bambang Pontjo Priosoeryanto Beti Elizabeth Silalahi Bram Koesbiantoro Budi Nurtama Budi Suarti C Hanny Wijaya Candytias Puspitasari DAHRUL SYAH DAHRUL SYAH Dahrul Syah Dede R. Adawiyah Dede R. Adawiyah Dedi Fardiaz Dewi, Fitriya Nur Annisa Dhania Sabilla Diana Ayu Nindita Dias Indrasti Dini Rizkyah Dody Dwi Handoko Dwyana Izza Augusta Elvira Syamsir Ema Hastarini Endang Prangdimurt Endang Prangdimurti Erliza Hambali Eti Indarti Fadhrizal Hafidi Wibowo Faleh Setia Budi Faqih Udin dan Jono M. Munandar Meivita Amelia Feri Kusnandar Florentina Florentina Friyuanita Lubis Hadi Munarko Handoko, Ari Hasti Wiaranti Heny Herawati Heny Herawati Hilka Yuliani Ho-Shing Wu Hunaefi, Dase I Ketut Suada Ika Amalia Kartika Ilham Marvie Indah Kurniasari Ineke Kusumawaty Inneke Kusumawaty Inneke Kusumawaty, Inneke Ira Dwi Rachmani Ira Mulyawanti Ira Mulyawanti Ita Zuraida Juliani - Kardinan, Selma Aprilla Kezia Grace Abraham Kiyat, Warsono El Kurniadi, Nadine Kurniati , Yeni Laila Apriani Hasanah Harahap Lilis Nuraida Masita Ardi Kumalasari Maya Indra Rasyid Maya Kurniawati, Maya Mojiono, Mojiono Muchtaridi Muchtaridi Muh. Yusram Massijaya Mulyorini Rahayuningsih Mutia Khonza Nadine Kurniadi Nancy D. Yuliana Nancy Dewi Yuliana Nanik Purwanti NASRIANTI SYAM, NASRIANTI nFN Setyadjit nFN Sukarno Nia Ariani Putri Normalina Arpi Nouverra Nadya Putri Nova Kushandita Noviasari, Santi Novriaman Pakpahan Nur Annisa Nur Fathonah Sadek Nur Wulandari Nuri Andarwulan Nurul Khumaida Palupi, Nurheni Sri Paradigma, Hening Prangdimurt, Endang Purwiyatno Hariyadi Putra, Imam Perdana Putri Novita Savitri Rahma, Cukri Ramadhan, Febiana Putri Reni Juliana Gultom Reza Widyasaputra Riezka Zuhriatika Rasyda Rifqi Ahmad Riyanto Rinawati Rinda Kusumawati Rista Fitria Anggraini Rokhani Hasbullah Rosulva, Indah Sadek, Nur Fathonah Safrida Safrida Safrida Safrida Safrida Santi Dwi Astuti Santi Noviasari Santi Noviasari Sapta Raharja SEDARNAWATI YASNI Setiadjit Setiadjit Sitanggang, S.TP, MSc, Azis Boing Siti Zakiyatul Khamidah Soewarno T. Soekarto Sri Widowati Sriani Sujiprihati Sugiyono . Sukarno Sukarno Sukarno Sukarno Sulusi Prabawati Suryani Suryani Sutrisno Sutrisno Tajuddin Bantacut Tatty Yuniati Tengku Mia Rahmiati Tien R. Muchtadi Tjahja Muhandri Tsaniyah Ayu Mauliasyam Tubagus Bahtiar Rusbana Tyas Hermala Anindita Wahyudi David Widara, Suba Santika Winda Nurtiana Winda Septiana Wita Murdiati Wita Murdiati Yane Regina Yane Regiyana Yane Regiyana Yanica Ivory Andri Yeni Kurniati Yeni Kurniati Yose Rizal Kurniawan Yuliyanti yuliyanti Yundari, Yundari Yuni Dwi Kartika Yustikawati Zita L. Sarungallo