Extraction and Application of Fruit Waste (Citrus Maxima) in Microalgae Harvesting

Harvesting microalgae has been increasingly relevant due to its potential as a biofuel
source. Apparently, the coagulation-flocculation method is known as the most
effective and convenient microalgae harvesting technique. However, human health
and environmental concerns aroused when the inorganic coagulants are being
excessively used in the conventional coagulation-flocculation process. Subsequently,
the natural coagulants have emerged as an alternative to alleviate the problem. This
proposed research specifically study the application of biopolymer (pectin) extracts
from Citrus Maxima (pomelo)’s peel by hot sulphuric acid and ethanol precipitation
in microalgae harvesting. Nevertheless, only the flavedo (green) of the pomelo skin is
being used in the extraction process. After that, some physico-chemical properties of
the extracted pectin were tested such as zeta potential and functional groups. The
biopolymer is found negatively-charged and hence act as a coagulant aid in reducing
sole dependency on inorganic coagulant.