Rancang Bangun Alat Ukur Konsentrasi Oksigen yang Dihasilkan oleh Fotobioreaktor Mikroalga Chlorella vulgaris Menggunakan Sensor SK-25F

Authors

  • Aminah Nurrrahmawati Jurusan Fisika FMIPA Universitas Andalas
  • Harmadi Harmadi Jurusan Fisika FMIPA Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.6.3.255-262.2017

Abstract

Telah dilakukan perancangan alat ukur konsentrasi oksigen yang dihasilkan oleh fotobioreaktor mikroalga Chlorella vulgaris. Rancangan alat menggunakan sensor SK-25F dengan penguat noninverting sebagai pengondisi sinyal, mikrokontroler Atmega328 sebagai pengolah data serta LCD sebagai piranti penampil. Besar sensitifitas alat adalah 0,478 dan R2 = 0,980. Persen error rata-rata yang didapatkan sebesar 1,383% dibandingkan dengan alat ukur acuan Gas Alert Microclip. Pengukuran dilakukan pada fotobioreaktor yang disuplai dan tidak disuplai karbondioksida. Fotobioreaktor menggunakan tiga jenis sumber cahaya yaitu lampu halogen, LED dan cahaya matahari serta pada kondisi tanpa cahaya (0 lux). Konsentrasi oksigen maksimum dihasilkan oleh fotobioreaktor yang disinari lampu halogen dengan intensitas cahaya 5000 lux dengan suplai karbondioksida sebesar 20,96%. Konsentrasi maksimum juga dihasilkan oleh fotobioreaktor yang disinari cahaya matahari dengan diberi suplai karbondioksida pada jam 15.00 WIB.

Kata kunci: fotobioreaktor, mikroalga Chlorella vulgaris, sensor SK-25F, konsentrasi oksigen.

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Published

2017-07-05

How to Cite

Nurrrahmawati, A., & Harmadi, H. (2017). Rancang Bangun Alat Ukur Konsentrasi Oksigen yang Dihasilkan oleh Fotobioreaktor Mikroalga Chlorella vulgaris Menggunakan Sensor SK-25F. Jurnal Fisika Unand, 6(3), 255–262. https://doi.org/10.25077/jfu.6.3.255-262.2017

Issue

Vol. 6 No. 3 (2017)

Section

Articles

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Copyright (c) 2017 Aminah Nurrrahmawati, Harmadi Harmadi

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