Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

DISRUPTING AND HARVESTING OF MICROALGAE CELLS USING OZONE BUBBLES

JIE QIAN, LOH (2017) DISRUPTING AND HARVESTING OF MICROALGAE CELLS USING OZONE BUBBLES. IRC, Universiti Teknologi PETRONAS.

[img] PDF
Restricted to Registered users only

Download (1340Kb)

Abstract

Harvesting microalgae for biodiesel production has been a difficult process due to its small cell size. In the present study, harvesting process of Chlorella vulgaris was carried out by using ozonation to determine the optimized conditions for ozonation process, the effectiveness of ozonation in harvesting microalgae and plausible disruption of microalgae cell walls. The optimized ozonation conditions were found as follows: ozone concentration of 100% (45 g/m3), pH 6.0, ozonation for 30 minutes, ozone flowrate of 7.0 L/min and temperature of 40˚C. By utilizing the optimized conditions, it was found a 20% increment in overall sedimentation efficiency for microalgae at absorbance 1.5. In addition, the lipid yield attained was 38.5% higher than the conventional gravity sedimentation method. However, the optimized conditions did not produce a significant result for both sedimentation efficiency and lipid yield when microalgae with absorbance of 3.15 was used. Apart from that, zeta potential analysis showed that microalgae after ozonation claimed to have lower zeta potential value, resulting in instability and higher coagulation rate. SEM analysis was carried out to observe the cell morphology. Cell wall disruption and microalgae cell coagulation after ozonation were illustrated for both absorbance 1.5 and 3.15 in the SEM micrographs. The experimental data was found to be a good fit with pseudo-second-order kinetics model and an activation energy of 112.27 kJ/mol was determined using Arrhenius equation plot.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Separation Process
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Ahmad Suhairi Mohamed Lazim
Date Deposited: 01 Aug 2018 09:32
Last Modified: 01 Aug 2018 09:32
URI: http://utpedia.utp.edu.my/id/eprint/18052

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...