The resulting structure alteration in boiling, steaming and ultrasonication pretreatment had caused the lignocellulosic
components in the water hyacinth biomass to be liberated and be-came more accessible for exploitation in the subsequent process. For this reason, sugar yield from acid hydrolysis of steamed, boiled and ultrasonicated sample
(Sample 4x, 5x, 7x–11x) was found to be higher compared to untreated sample (Sample 1)