CD Skripsi

Pengukuran kapasitas carbon sink pada metabolisme spirulina platensis berbasis biosensor dissolved oxygen (do) dan sensor non dispersive Infrared (ndir)

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Carbon emissions in Indonesia continue to rise annually, contributing to global warming and ecosystem degradation. One promising solution for mitigating carbon dioxide (CO₂) emissions is the utilization of Spirulina platensis as a carbon sink. This microalga was selected due to its ability to absorb CO₂ during photosynthesis and convert it into dissolved oxygen (DO) and biomass. This study aims to analyze the reduction of CO₂ concentration in a photobioreactor and evaluate its effects on DO and culture pH. Experiments were conducted using a photobioreactor system with white LED lighting (400–700 nm) as a substitute for sunlight. CO₂ gas was injected into the reactor at a flow rate of 0.1 L/min with varying concentrations of 10%, 15%, 20%, and 25%. Measurements were taken simultaneously using a Clark sensor (DO) and a Non-Dispersive Infrared (NDIR) sensor (CO₂). The results showed that CO₂ concentration in the bioreactor decreased due to Spirulina platensis photosynthetic activity, accompanied by an increase in DO and a decrease in pH as the initial CO₂ concentration increased. The carbon sink capacities achieved were 10.27%, 13.58%, 22.60%, and 35.50%, respectively. Validation of the NDIR sensor using acid-base titration with 0.1 M NaOH yielded linear results of 6.82%, 16.25%, 29.18%, and 33.54%, while DO levels increased significantly to 170.90%, 203.88%, 230.01%, and 252.43%. The culture pH gradually decreased to 6.72, 6.65, 6.37, and 5.81. The Pt-Ag electrode sensor, based on an amperometric biosensor principle, detected minute changes in CO₂ concentration with a sensitivity of -0.0905 mV/ppm. Statistical ANOVA analysis indicated a significant difference among CO₂ concentration variations < 0.001. These findings demonstrate that Spirulina platensis has high potential as a carbon sink for CO₂ emission mitigation.
Keywords: Biosensor amperometric, Carbon sink capacity, CO₂ mitigation, Dissolved oxygen (DO), NDIR sensor, Spirulina platensis

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103134779

Penerbit

Pekanbaru : Universitas Riau FMIPA Fisika., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103134779

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia

Versi lain/terkait

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