“…Very few of the technologies that add value to rice husk have been tested in SSA. These include the use of rice husk as biofuel for the generation of heat and electricity (Sookkumnerd et al, 2005;Goyal et al, 2008;Lim et al, 2012a), biosorption of heavy metals from single and mixed metal solutions (Krishnani et al, 2008;El-Shafey, 2010), vermicomposting for the production of organic fertilizer (Lim et al, 2012b), as animal feed after physical, chemical, or biological treatment (Vadiveloo et al, 2009), and as a support for solid-state fermentation (Kapilan and Arasaratnam, 2011). Rice husk ash (RHA), a product of rice-husk combustion, is useful as a material for building and construction (Khan et al, 2012;Yuzer et al, 2013), glass ceramic tiles and whiteware (Prasad et al, 2001;Andreola et al, 2013), reinforcement of aluminum alloy (Saravanan and Senthil Kumar, 2013), production of silica powder, activated carbon, and carbon-silica composite (Kumagai and Sasaki, 2009;An et al, 2011).…”