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Amnan Haris
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Agriculture, Biological Sciences & Forestry Computer Science & IT Energy Engineering Environmental Science Other

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Pengaruh Laju Injeksi Karbondioksida terhadap Oksigen Terlarut dan Pertumbuhan Spirulina platensis Al Anshori, Aziz; Sri Ngabekti; Andhina Putri Heriyanti; Amnan Haris
Life Science Vol. 13 No. 2 (2024): November 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/unnesjlifesci.v13.i2.14327

Abstract

Indonesia has a high and continually increasing total greenhouse gas emission. Carbon dioxide absorption can be mitigated by utilizing the photosynthesis process of microalgae. Spirulina platensis was chosen as the sample to be cultivated in this study due to its ease of cultivation and its status as a large-scale carbon dioxide absorber. The objective of this research is to analyze the effect of varying carbon dioxide injection rates on dissolved oxygen and the growth of S. platensis. This research employed an experimental method involving semi-mass cultivation using a 12 L volume tube photobioreactor (PBR) as a container with three treatment variations. These variations included culture P0 (without injection/control), culture PA (0.5 L/minute), and culture PB (1 L/minute). The data analysis revealed that the variation with an increase in dissolved oxygen levels and enhanced growth of S. platensis was most optimal in culture PB (1 L/min). One-way ANOVA results showed significant differences between culture P0 (without injection) and classified data indicating that culture PB (1 L/min) fell into a high-level classification. The average dissolved oxygen value for culture PB (1 L/min) was 7.9 mg/L, with a cell density average of 0.651 cells/ml and a dry biomass weight of 3.8 grams. The conclusion drawn is that varying carbon dioxide injection rates significantly affect dissolved oxygen levels and the growth of S. platensis, as evidenced by cell density and biomass calculations. The effect on the S. platensis culture is a notable increase in both parameters. The application of varying carbon dioxide injection rates in the cultivation of S. platensis may serve as a reference for identifying the optimal carbon dioxide injection rate during semi-mass cultivation.
Optimalisasi Peran Pemuda Desa Peron dalam Pengembangan Social Entrepreneurship Berbasis Limbah Kopi Daffa Evan Pradama; Muhammad Agnaf Naufal; Aurelia Dias Nanda Revalina; Aira Trismadya Primagati; Rizqa Najwa; Farid Nur Hidayat; Amnan Haris
Jurnal Pengabdian Kepada Masyarakat ITK (PIKAT) Vol. 6 No. 2 (2025): PIKAT : Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Institut Teknologi Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/pikat.v6i2.8481824

Abstract

Peron Village is one of the local coffee centers that produces abundant post-harvest waste in the form of coffee grounds and husks. So far, this waste has not been optimally utilized and has the potential to pollute the soil, increase organic pollution, and reduce the quality of the rural environment. This condition calls for innovation based on the circular economy. The hypothesis of this study is that the involvement of young people through a social entrepreneurship approach in coffee waste management can create environmentally friendly innovations while strengthening local economic resilience. This study uses a descriptive qualitative method with in-depth interviews, observation, and documentation techniques, as well as validation through source and method triangulation. Research informants included members of the Karang Taruna youth organization, coffee farmers, community leaders, and micro-business actors in Peron Village. The results showed that young people played an active role in processing coffee waste into liquid organic fertilizer, cascara, and briquettes. These products not only reduce environmental pollution but also increase soil fertility, open up opportunities for functional food businesses, and provide environmentally friendly alternative energy. The involvement of young people demonstrates their strategic role as agents of change who integrate social, economic, and environmental benefits. The conclusion of this study confirms that coffee waste processing based on social entrepreneurship is an effective youth empowerment strategy, supporting the achievement of SDGs 7, 12, and 15, and has the potential to be replicated in other villages to promote sustainable development.
Co-Authors Aira Trismadya Primagati Al Anshori, Aziz Andhina Putri Heriyanti Aurelia Dias Nanda Revalina Daffa Evan Pradama Farid Nur Hidayat Muhammad Agnaf Naufal Rizqa Najwa Sri Ngabekti