Abstract
In this study, novel biocomposites of medium chain length polyhydroxyalkanoate (mcl-PHA) containing 75 mol% of 3-hydroxydecanoate (3-HD) incorporating torch ginger cellulose nanowhiskers (TGCN) were developed via solution casting. The result showed that the morphology and mechanical properties of mcl-PHA were not significantly affected by TGCN. However, addition of TGCN decrease the crystallization temperature and water vapour and oxygen permeability of mcl-PHA. Furthermore, this material was prepared as a filter for bacteria removal and water filtration. The efficiency of the filter was increased with an increase of film number. 90–92% of bacteria and yeast were removed when a stack of three mcl-PHA-based films was applied in the filter holder. However, the efficiency of the filter was lower than the World Health Organization standard. The filter was also used for domestic wastewater purification. The biological oxygen demand, solid content and total bacteria in wastewater were significantly decreased using mcl-PHA based filter. The parameters tested in this current study also passed water quality standards for domestic wastewater (Thailand). It can be summarized that mcl-PHA-based biocomposites are able to remove microorganisms from water. Moreover, they can be applied for water purification.
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