Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
Bioresour Technol. 2015 Jan;176:196-202. doi: 10.1016/j.biortech.2014.10.141. Epub 2014 Nov 4.
Nizimuddinia zanardini macroalgae, harvested from Persian Gulf, was chemically characterized and employed for the production of ethanol, seaweed extract, alginic acid, and biogas. In order to improve the products yields, the biomass was pretreated with dilute sulfuric acid and hot water. The pretreated and untreated biomasses were subjected to enzymatic hydrolysis by cellulase (15FPU/g) and β-glucosidase (30IU/g). Hydrolysis yield of glucan was 29.8, 82.5, and 72.7g/kg for the untreated, hot-water pretreated, and acid pretreated biomass, respectively. Anaerobic fermentation of hydrolysates by Saccharomycescerevisiae resulted in the maximum ethanol yield of 34.6g/kg of the dried biomass. A seaweed extract containing mannitol and a solid residue containing alginic acid were recovered as the main byproducts of the ethanol production. On the other hand, the biogas yield from the biomass was increased from 170 to 200m(3) per ton of dried algae biomass by hot water pretreatment.
从波斯湾收获的 Nizimuddinia zanardini 大型藻类经过化学表征，可用于生产乙醇、海藻提取物、藻酸和沼气。为了提高产品产量，使用稀硫酸和热水对生物质进行预处理。将预处理和未预处理的生物质用纤维素酶（15FPU/g）和β-葡萄糖苷酶（30IU/g）进行酶解。未处理、热水预处理和酸预处理生物质的葡聚糖水解得率分别为 29.8、82.5 和 72.7g/kg。通过酿酒酵母对水解产物进行厌氧发酵，可得到最大的乙醇得率为 34.6g/kg 干生物质。乙醇生产的主要副产物是含有甘露醇的海藻提取物和含有藻酸的固体残渣。另一方面，通过热水预处理，生物质的沼气产量从每吨干藻生物质 170m³增加到 200m³。
