Generation of Microbubbles through Single Loop and Double Loop Fluid Oscillator for Photobioreactor Aeration

Abstract

Microbubbles are known for their many applications. Recently there has been new findings regarding the growth of susceptible microalgae through microbubble aeration. There are three methods used to generate microbubbles for this microalgae strain. Unfortunately, for some methods, the cost of generating microbubbles is still high. However, fluidic oscillators can be used to produce microbubbles at a reasonable cost. There are two types of fluid oscillators: single loop and double loop. This study determined the bubble size produced with these oscillators. Bubble size data was recorded using a high-speed camera at air flow rates of 6 LPM, 9 LPM, 12 LPM, and 15 LPM, and utilized 10 µm microporous shafts as the diffuser. The data were processed using ImageJ software. The results showed that the size of the bubble using a single loop fluid oscillator was smaller than that of the double loop fluid oscillator. The smallest bubble size was obtained in a single loop fluid oscillator with an airflow of 6 LPM.

Effect of Lens Aperture for Analysis of Bubble Image Size Microbubble Generator Aeration System

“…Microbubble diameter 50 -150 μm with MotionBLITZ high speed camera EoSenseCube 7 [25]. Rizaldi et al [26] a Nikon D5200 camera with aperture lens f 1/4000 1030 (2022) 012011 IOP Publishing doi:10.1088/1755-1315/1030/1/012011 2 produces a 1 -4 mm bubble. However, the use of high-speed cameras and lens aperture speeds still produce bubbles above standard.…”

Effect of Power Pump and Nozzle Diameter Microbubble Generator to Increase Oxygen Concentration in Aquaculture

“…This technology is better known as microbubble generators (MBG or MBGs) (Afisnaa et al, 2017;Alfarraj et al, 2020;Basso et al, 2018;Juwana et al, 2019;Liew et al, 2020). MBG can produce micro-sized bubbles (Deendarlianto et al, 2015;Rizaldi et al, 2019) and accelerate to increase DO concentration (Jeon et al, 2018;Rahmawati et al, 2021), and save energy (Parmar & Majumder, 2013). There are various methods for generating a microbubble technology: Using venturi (Dey et al, 2020;Huang et al, 2021;Wilson et al, 2021;Yadav et al, 2019), using Nozzle (Alam et al, 2018;Ferrando et al, 2021;Khan et al, 2020;Kim & Lee, 2021;Lee et al, 2019;Lin et al, 2018;Wu et al, 2021), using Orifice (Basso et al, 2018;Daskiran et al, 2019;Deendarlianto et al, 2015;Juwana et al, 2019;Kataoka et al, 2020;Liew et al, 2020;Miao et al, 2021;Morito & Makuta, 2018;Rizaldi et al, 2019;Sadatomi et al, 2012), and used DAF Kiuru, 2001).…”

Biomass Production and Synthesis of Biodiesel from Microalgae Synechococcus HS-9 (Cyanobacteria) Cultivated Using Bubble Column Photobioreactors

“…A potential environmentally friendly biofuel is biodiesel derived from microalgae (the third generation). It is primarily a sustainable, clean fuel that is environmentally friendly, non-toxic and free of harmful sulfur 7,8) . Biodiesel, also known as the fatty acid methyl ester (FAME), is a renewable fuel which is considered an attractive replacement for conventional diesel fuels 9) .…”