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Restu Utari Dewina
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Biochemistry, Genetics & Molecular Biology Materials Science & Nanotechnology

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Chromium Bioremediation Using a Combination of Two Indigenous Rhizobacteria In Vitro Wahyu Surakusumah; Nurul Ilma Apriliani; Diah Kusumawaty; Wijanarka Wijanarka; Achmad Dinoto; Restu Utari Dewina
Al-Kauniyah: Jurnal Biologi Vol. 19 No. 2 (2026): AL-KAUNIYAH: JURNAL BIOLOGI
Publisher : Department of Biology, Faculty of Science and Technology, Syarif Hidayatullah State Islami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/kauniyah.v19i2.44529

Abstract

Sukaregang, known for its leathercraft industry, faces chromium pollution from poorly managed tannery waste, affecting soil and water resources. The dynamic soil area influenced by plant roots, known as the rhizosphere, becomes a habitat for various microorganisms with unique metabolic capabilities that have significant potential as bioremediation agents for heavy-metal-contaminated environments. This study aims to evaluate the potential of indigenous bacterial consortia from the chromium-contaminated rhizosphere as bioremediation agents. Five bacterial genera: Pseudomonas, Citrobacter, Bacillus, Azotobacter, and Micrococcus, were identified as chromium-resistant in vitro. Compatibility tests showed that these bacterial combinations exhibited synergies without growth inhibition. Among the five consortia combinations tested (AB, BC, CD, DE, EA), consortium DE (Azotobacter and Micrococcus), exhibiting the most stable growth dynamics, characterized by a sustained stationary phase, suggesting a superior adaptive response to chromium-induced stress. Under chromium stress, the consortium EA (Micrococcus and Pseudomonas) achieved the highest chromium removal percentage at 30.78%. This study suggests that indigenous rhizobacterial consortia could be a practical approach to remediate chromium pollution in areas like Sukaregang.
Peningkatan kualitas air pada budidaya ikan nila menggunakan sistem filtrasi bertingkat Wahyu Surakusumah; Diah Kusumawaty; Restu Utari Dewina; Aisyah Belva; Fadya Oktavia; Kirey Qanita; Naneu Nurfarida; Siti Nabila
Jurnal Abmas Vol. 26 No. 1 (2026): Jurnal Abmas
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/abmas.v26i1.670

Abstract

Algal bloom in Nile tilapia (Oreochromis niloticus) culture systems based on Recirculating Aquaculture Systems (RAS) can degrade water quality and increase the risk of fish stress. This community service program aimed to implement a multi-stage filtration system as an eco-friendly and energy-efficient solution to control microalgae growth and improve water quality in Nile tilapia culture ponds. The program was conducted through a Biology Study Program consultancy project involving lecturers, students, and the Padasuka Nila Cimahi aquaculture partner. The filtration system combined mechanical and biological filtration using fishing nets, gravel, kaldness K1, filter brushes, coral stones, and zeolite. Water quality parameters, including pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and total ammonia, were evaluated before and after system implementation. The results showed that the filtration system reduced pH from 9.18 to 7.60, EC from 284 µS/cm to 212 µS/cm, TDS from 147 ppm to 115 ppm, and total ammonia from 0.5 mg/L to 0.18 mg/L. In addition, pond water became visually clearer, and microalgae growth decreased significantly. The multi-stage filtration system proved to be an effective, low-cost, and sustainable approach for improving water quality in small- to medium-scale Nile tilapia aquaculture systems.
Co-Authors Achmad Dinoto Aisyah Belva Diah - Kusumawaty Fadya Oktavia Kirey Qanita Naneu Nurfarida Nurul Ilma Apriliani Siti Nabila Wahyu Surakusumah Wijanarka Wijanarka