@article{Hamouda_Hussein_El-Naggar_2018, title={Potential value of red and brown seaweed for sustainable bioethanol production}, volume={44}, url={https://www.banglajol.info/index.php/BJB/article/view/38571}, DOI={10.3329/bjb.v44i4.38571}, abstractNote={<p>Algae are renewable sources of feedstock for bioethanol that can be grown on non arable lands, non productive water sources and inexpensive culture systems. Red seaweed <em>Laurencia obtusa </em>and brown seaweeds <em>Cystoseira compressa</em>, <em>Colpomenia sinuosa </em>were analysed by determining sugar content by HPLC and converted into suitable fermentable feedstock by NaOH, H<sub>2</sub>SO<sub>4</sub>, HCl and H<sub>3</sub>PO<sub>4</sub> at concentrations 1, 2, 3, 4 and 5% at 21°C of 20 minutes. The efficiency of hydrolysis significantly improved by 5% HCl for <em>Laurencia obtusa </em>at 42.84 g sugar/100 g dry biomass. Pretreatment of <em>Cystoseira compressa </em>and <em>Colpomenia sinuosa </em>with 3 and 5% H<sub>3</sub>PO<sub>4</sub> gave higher sugar content of 30.51 and 41.34 g/100 g dry biomass, respectively. A relatively high level ethanol of 0.146 g/g dry biomass of <em>Laurencia obtusa </em>was produced<em>. </em>Results indicate that <em>Cystoseira compressa </em>and <em>Laurencia obtusa </em>can be good feedstocks for bioethanol production.</p>}, number={4}, journal={Bangladesh Journal of Botany}, author={Hamouda, Ragaa A and Hussein, Mervat H and El-Naggar, Noura El-Ahmady}, year={2018}, month={Oct.}, pages={565–570} }