English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Raw material pre-treatment becomes an important step in the bioetanol production from macroalgae. It’s help to breakdown sulfated groups and lignin, facilitate the hydrolysis process to increase reducing sugars.  Gelidium latifolium  and  Caulerpa racemosa  are red and green algae which used for bioethanol production in this study. The carbohydrate content was 23.81% and 30.54% respectively. The study aims to evaluate the effect of alkaline pre-treatment to the chemical characteristics of macroalgae, productivity of sugar and bioethanol. The alkaline used was sodium hydroxide (NaOH) with a concentration of 0.05 and 0.1 N, soaking time for 3 days at room temperature. From the result, it was known that water and alkaline pre-treatment increased cellulose content for both macroalgae, as well as yield of reducing sugars. The highest reducing sugar for  G. latifolium  was 5.26% w/v obtained from 0.1 N NaOH pre-treatment. While for  C. racemosa  it was 7.67% w/v obtained from the one which submerged on water.  G. latifolium  treated with 0.05 N NaOH has the highest ethanol content of 6.3 ml/L with 21.94% fermentation efficiency and 37.30% substrate efficiency. On the other hand, the highest ethanol production for  C. racemosa  obtained from water immersion of 7 ml/L with 17.26% fermentation efficiency and 15.41% substrate efficiency.

Alkaline Pre-Treatment of Gelidium Latifolium and Caulerpa Racemosa for Bioethanol Production