Effect of different flocculants on the flocculation performance of microalgae, Chaetoceros calcitrans, cells
By Z. Harith, F. Yusoff, M. Mohamed, M. Din, A. Ariff. 2009
101 citations recorded by the source corpus.
The possibility of using flocculation technique for the separation of microalgae, Chaetoceros calcitrans, biomass from the culture broth was investigated. The flocculation experiments were conducted in 500 mL beaker using culture broth obtained from 10 L photobioreactor. The harvesting efficiency of 90 and 60% was obtained in flocculation without flocculants conducted for 10 days at 27oC (in light and dark) and 4oC (dark), respectively. Harvesting efficiency higher than 90% with short settling time was achieved by adjusting the culture pH to 10.2 using either sodium hydroxide (NaOH) or potassium hydroxide (KOH). Improved cell viability (> 80%) and settling time with a slight improvement of flocculation efficiency was achieved by the addition of polyelectrolytes flocculant (Magnafloc® LT 27 and LT 25). However, the flocculants were only functioned when the pH of the microalgae culture was pre-adjusted to a certain value that promotes cells entrapment and surface charge neutralization prior to flocculation process. The flocculation efficiency and cell viability obtained in flocculation with Magnafloc® (LT 25 and LT 27) was comparable to that obtained in flocculation with chitosan. When chitosan and Magnafloc® (LT 25 and LT 27) were used as flocculants, the highest flocculation efficiency of C. calcitrans cells was observed at pH 8 and 10.2, respectively. Substantial increased in sedimentation rate was observed with increasing flocculants dosage though the flocculation efficiency and cell viability were not significantly varied.
Subfields: Industrial and Manufacturing Engineering, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/0df3db1d59c4984a8499a345238e8d2a958351c0
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Effects of flocculants on lipid extraction and fatty acid composition of the microalgae Nannochloropsis oculata and Thalassiosira weissflogii (2011, background): “[13] Harith ZT, Yusoff FM, Mohamed MS, Din MS, Ariff AB.”
- Industrial polymer effluent treatment by chemical coagulation and flocculation (2013, methodology): “In the third step, pH was adjusted to 8 using lime 155 as Magnafloc155 tends to work best in the pH range of 6 to 10 [39] which was also suggested by 156 the manufacturer, Goldcrest Chemicals Limited, UK.”
- A review of the harvesting of micro-algae for biofuel production (2013, background): “Dosages of non-organic flocculants can be high at 1 g l-1 (Papazi et al. 2010) and although aluminium sulphate flocculated micro-algae have been used for aquaculture feed inorganic flocculants can be toxic (Harith et al. 2009).”