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All Journal Microbiology Indonesia Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung
NINA JULIANA ROBERTA TURNIP
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Engineering Immunology & microbiology Industrial & Manufacturing Engineering Medicine & Pharmacology

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The Effect Of Aeration Rate On The Growth Of Blue Green Microalgae in Buffalo Dung As Alternative Media EDWIN YONATHAN GURNING GURNING; AMOS IMANUEL; NINA JULIANA ROBERTA TURNIP; ADELINA MANURUNG
Microbiology Indonesia Vol. 13 No. 4 (2019): December 2019
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.686 KB) | DOI: 10.5454/mi.13.4.4

Abstract

The high demand of Arthrospiraplatensis as a veritable protein source encourages its mass production worldwide. Currently, mass production of Arthrospiraplatensis is hindered by the relatively high price of the growth media. Recently, it is discovered that Arthrospiraplatensis can be cultivated using buffalo dung as an alternative medium. Buffalo dung is an excellent source of nitrogen and phosphorus which are principal macronutrients for the growth of Arthospiraplatensis. In addition to nitrogen and phosphorus, carbon is also a macronutrient that is important to the growth of microalgae. The carbon source used by the microalgae is carbon dioxide, which is consumed through photosynthesis. Carbon dioxide can be derived directly from the atmosphere as atmospheric CO2 existing as much as 0.04%-v/v in air, which can be provided directly using an aeration pump into the growth medium microalgae. During the aeration process, CO2 mass transfer occurs from the gaseous phase into the liquid phase. This research aims to investigate the effect of the aeration rate on the growth of the blue-green microalgae Arthrospiraplatensisusing buffalo dung media as an alternative medium. Arthrospiraplatensis will be cultivated on buffalo dung media using various aeration rates to determine the effect of aeration on the specific growth rate (µ). The air will also be pumped into the growth medium without Arthrospiraplatensis at the specific aeration rates to determine the mass transfer coefficient (kLa) that occurs from the air leading to growth medium. Analysis of mass transfer coefficient (kLa) of carbon dioxide will be conducted using the sulfite method. Variation of aeration that used in this research are 0.2 vvm; 0.4 vvm; 0.6 vvm; 1.2 vvm; 2.4 vvm that has mass transfer coefficient dan specific growth rate are 0.005 min-1 and 0.1987 day-1; 0.009 min-1 and 0.2279 day-1; 0.012 min-1 and 0.2044 day-1; 0.034 min-1 and 0.1918 day-1; 0.035 min-1 and µ in 2.4 vvm can’t determine, respectively.
Studi Studi Potensi Mikroalga Termodifikasi Sebagai Biosorben Ramah Lingkungan Untuk Bioremediasi Logam Berat Nina Juliana Roberta Turnip; Shinta Mariboto Silvia Sinaga; Lestari; Sinaga, Fernando
Prosiding Seminar Nasional Ilmu Teknik Dan Aplikasi Industri Fakultas Teknik Universitas Lampung Vol. 8 (2025): Prosiding Seminar Nasional Ilmu Teknik dan Aplikasi Industri (SINTA) 2025
Publisher : Fakultas Teknik Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pencemaran logam berat seperti timbal (Pb), kadmium (Cd), dan merkuri (Hg) dari limbah industri tekstil, pertambangan, dan oleokimia menjadi ancaman serius bagi kesehatan dan lingkungan. Mikroalga berpotensi besar sebagai biosorben alami untuk bioremediasi, namun efisiensinya terbatas akibat rendahnya jumlah gugus aktif pada dinding sel. Kajian ini meninjau potensi mikroalga termodifikasi melalui studi pustaka dari berbagai penelitian nasional dan internasional. Modifikasi kimia seperti aktivasi asam, basa, dan esterifikasi terbukti meningkatkan densitas gugus fungsional (karboksil, hidroksil, amina, dan sulfat), sehingga memperkuat interaksi dengan ion logam. Chlorella vulgaris menunjukkan efisiensi penyerapan Pb(II) lebih dari 90% pada pH netral, sedangkan Spirulina platensis hasil esterifikasi mampu meningkatkan kapasitas adsorpsi Cr(VI) hingga 40%. Teknik imobilisasi dan komposit magnetik juga terbukti memperpanjang umur pakai biosorben hingga lima siklus regenerasi tanpa penurunan signifikan. Meskipun masih menghadapi tantangan teknis dan ekonomis, hasil studi menunjukkan bahwa mikroalga termodifikasi berpotensi sebagai solusi bioremediasi yang efisien, murah, dan berkelanjutan untuk pengelolaan limbah logam berat di Indonesia.
Co-Authors ADELINA MANURUNG AMOS IMANUEL EDWIN YONATHAN GURNING GURNING Fernando Sinaga Lestari Shinta Mariboto Silvia Sinaga