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Optimasi Kondisi Inkubasi Kultur (Suhu dan Agitasi) Terhadap Pertumbuhan dan Aktivitas Protease Ektraseluler Bakteri Bacillus firmus Asosiasi Sponge (Porifera: Demospongiae) dari Nusa Lembongan Bali Indonesia Muhammad Zainuddin; Delianis Pringgenies; Ocky Karna Radjasa; Haeruddin Haeruddin; Aninditia Sabdaningsih; Vivi Endar Herawati
Journal of Marine Research Vol 11, No 3 (2022): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v11i3.35001

Abstract

Perkembangan budidaya udang secara intensif, diikuti pula oleh permasalahan limbah organik sisa pakan. Salah satu cara untuk mengatasi permasalahan limbah organik adalah dengan bioremediasi menggunakan probiotik. Komponen utama limbah organik pakan ini adalah protein. Oleh sebab itu, konsorsium probiotik merupakan bakteri proteolitik. Bakteri Bacillus firmus yang bersimbiosis dengan sponge Chalinula pseudomolitba merupakan bakteri yang menghasilkan enzim protease ektraseluler yang dapat menghidrolisis protein menjadi senyawa yang sederhana. Bakteri Bacillus firmus memiliki potensi untuk dijadikan probiotik. Diperlukan informasi tentang kondisi suhu dan agitasi inkubasi yang optimal untuk mendapatkan biomassa sel bakteri Bacillus firmus dalam pembentukan probiotik. Tujuan penelitian ini adalah melakukan uji optimasi suhu dan agitasi dalam inkubasi kultur terhadap pertumbuahn dan aktivitas protease ekstraseluler bakteri Bacillus firmus. Penelitian menggunakan metode eksperimen laboratoris. Penelitian telah berhasil melakukan uji optimasi suhu dan agitasi inkubasi kultur. Hasil penelitian menunjukkan bahwa bakteri Bacillus firmus memiliki laju pertumbuah dan aktivitas protease terbaik pada kondisi kultur dengan suhu inkubasi 30 oC dengan nilai sebesar 0,194 c dan 34,660 d IU/ml. Selain itu juga memiliki laju pertumbuah dan aktivitas protease terbaik pada kondisi agitasi inkubasi 150 rpm dengan nilai sebesar 0,124 b dan 40,039 b IU/ml.The development of intensive shrimp farming is also followed by the problem of organic waste from feed residues. One way to overcome the problem of organic waste is bioremediation using probiotics. The main component of this feed organic waste is protein. Therefore, the probiotic consortium is a proteolytic bacteria. Bacillus firmus bacteria in symbiosis with Chalinula pseudomolitba sponge is a bacterium that produces extracellular protease enzymes that can hydrolyze proteins into simple compounds. Bacillus firmus bacteria have the potential to be used as probiotics. Information about optimal temperature conditions and incubation agitation is needed to obtain cell biomass of Bacillus firmus bacteria in the formation of probiotics. The purpose of this study was to test the optimization of temperature and agitation in culture incubation on the growth and activity of extracellular proteases of Bacillus firmus bacteria. The study used a laboratory experimental method. Research has successfully carried out the optimization test of culture incubation temperature and agitation. The results showed that Bacillus firmus had the best growth rate and protease activity in culture conditions with an incubation temperature of 30 oC with values of 0.194 c and 34.660 d IU/ml. In addition, it also has the best growth rate and protease activity at 150 rpm agitated incubation conditions with values of 0.124 b and 40.039 b IU/ml.
Optimasi pH Dan Salinitas Media Kultur Terhadap Pertumbuhan Dan Aktivitas Protease Ektraseluler Bakteri Bacillus Firmus Dari Ekosistem Padang Lamun Nusa Lembongan – Bali. Muhammad Zainuddin; Delianis Pringgenies; Ocky Karna Radjasa; Haeruddin Haeruddin; Aninditia Sabdaningsih; Vivi Endar Herawati
Journal of Tropical Marine Science Vol 5 No 2 (2022): Journal of Tropical Marine Science
Publisher : Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (895.882 KB) | DOI: 10.33019/jour.trop.mar.sci.v5i2.2862

Abstract

Sponges are sponges that live on the bottom of the water. Sponges have a symbiotic relationship with bacteria. Chalinula pseudomolitba is a type of sponge that lives in the waters of Nusa Lembongan Bali and has the symbiotic bacterium Bacillus firmus. Bacillus firmus has proteolytic activity by producing extracellular protease enzymes. These bacteria have the potential to be developed into probiotics in remediating protein in organic waste left over from shrimp pond feed. In an effort to produce Bacillus firmus bacteria for probiotics, it is necessary to optimize the pH and salinity of the culture media. The purpose of this study was to optimize the pH and salinity of Bacillus firmus bacterial culture media from the symbiont sponge Chalinula pseudomolitba which has proteolytic activity. The research used aboratory experimental method. Research has succeeded in conducting tests to optimize pH and salinity of culture media on the growth and activity of extracellular protease enzymes in bacteria. The results showed that Bacillus firmus had the best growth rate and protease activity under culture conditions with a pH of 8 with values of 0,174 and 31,763 IU/ml, respectively. In addition, it also has the best growth rate and protease activity at media salinity of 30 ppt with values of 0,186 and 35,278 IU/ml.