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All Journal Jurnal Pengabdian Magister Pendidikan IPA Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Putri, Anni Zahara
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Earth & Planetary Sciences Education Engineering

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Utilization of domestic wastewater for the growth of microalgae Chlorella sp. Yolanda, Yuni; Hutasoit, Jenri P; Fitria, Laili; Anggamulia, Muh. Ilham; Putri, Anni Zahara; Pane, Fikryah Atikah; Nasution, Bagas Arya
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 3 (2025): SEPTEMBER 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.3.41376

Abstract

This study investigates the potential of using domestic wastewater as a growth medium for Chlorella sp. and examines how it affects water quality over a period of 24 days. The experiment was conducted using a Completely Randomized Design (CRD) with a single factor: four levels of domestic wastewater concentration0%, 25%, 50%, and 75%each tested in three replicates.The results showed that the highest biomass production occurred on day 8, reaching 0.337 mg/L in the 75% wastewater treatment (TR3), while the lowest was observed in the control group (C) at 0.210 mg/L. Statistical analysis using ANOVA followed by the Tukey test confirmed that the differences between treatments were significant (p 0.05). Correlation analysis showed a strong positive correlation between biomass and dissolved oxygen (DO, 0.949) and temperature (0.626), indicating that optimal light intensity and nutrient availability promote photosynthesis and biomass growth. In contrast, phosphate was negatively correlated with temperature (-0.738), suggesting that higher temperatures accelerate phosphate uptake by Chlorella sp. The study concludes that cultivating Chlorella sp. using domestic wastewater presents a sustainable solution for both biomass production and wastewater treatment. The microalgae help remove excess nutrients like nitrogen and phosphorus, enhancing water quality. However, as the algae decompose, they can also contribute to higher biological oxygen demand (BOD). This dual role underscores the promising potential of microalgae in promoting ecological wastewater management while supporting sustainable biomass production.Keywords:BiomassChlorella sp.Photobioreactorwastewater
Peningkatan Kompetensi Menggambar Teknik Digital Siswa SMK Melalui Pelatihan AutoCAD Berbasis Praktik Langsung Putri, Anni Zahara; Anggraini, Arrisha; Rizky Simanjuntak; Ummu Salamah; Heri Franata Sitorus; Hindra Karamah Putra Handana
Jurnal Pengabdian Magister Pendidikan IPA Vol 9 No 1 (2026): Januari - Maret 2026
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v9i1.14345

Abstract

Digital technical drawing competency based on AutoCAD proficiency represents an essential requirement for students pursuing construction-related vocational training to successfully transition into professional practice. This study reports on a community service intervention implemented at SMK Negeri 1 Lubuk Pakam, designed to systematically enhance students' competencies in digital technical drawing through hands-on AutoCAD training. The program engaged 26 Grade XI students specializing in Building Construction Engineering over a single training day. The instructional methodology integrated pre-assessment, instructor-led demonstration, structured laboratory-based practical training, and post-assessment evaluation. Comparative analysis of pre-test and post-test performance scores revealed substantive improvements in students' mastery of fundamental AutoCAD operations, 2D technical drawing procedures, layer organization protocols, and the application of technical dimensioning and annotation conventions. Qualitative feedback indicated that participants perceived the training as beneficial for their academic coursework completion and preparation for professional competency certification examinations. These findings substantiate the efficacy of intensive, hands-on AutoCAD training as a time-efficient and pedagogically sound intervention for advancing vocational students' technical competencies in digital drawing applications.
Co-Authors Anggamulia, Muh. Ilham Anggraini, Arrisha Fitria, Laili Hindra Karamah Putra Handana Hutasoit, Jenri P Nasution, Bagas Arya Pane, Fikryah Atikah Rizky Simanjuntak Sitorus, Heri Franata Ummu Salamah Yuni Yolanda