“…All date palm fractions had a lignin content higher than 25 g/100g DM, while for the rest of lignocellulosics the content ranged between 13.5 and 16.8 g/100g DM. This pattern indicated that the (Lu et al, 2010), b (Arhab et al, 2006) than 100 kg ethanol/t dry biomass (Pulp and Juice from S. sinus-persica (unwashed and washed), mangrove leaves, H. Uninervis, H. Ovalis, Ulva Sp., P. boergesenii, C. sinuosa, and dung from sheep, goat and cattle). Contributions of xylose and arabinose to bioethanol potential of most biomass and fractions were less than 50%, except pulp of unwashed and washed S. sinus-persica, unwashed and washed S. bigelovii, Ulva Sp., and mangroves stems and leaves.…”