Aquatic Biopolymers by Ololade Olatunji

Author:Ololade Olatunji
Language: eng
Format: epub
ISBN: 9783030347093
Publisher: Springer International Publishing

8.6.2 Water Consumption

The extraction process is an aqueous one such that water serves as the solvent for extraction. Water is also used in the washing of the raw material during cleaning and pretreatment. Following extraction and separation of the gel, the water which contains impurities then needs to be treated before release into the environment. Depending on the level of treatment, this inevitably involves release with a level of contamination into the environment.

The amount of water used in the washing of the biomass was not specified in the said study (Tabarsa et al. 2018). Assuming a 1:10 ratio of dry biomass to tap water, such that 10 mL of water is required per gram for washing stage. For the main extraction, 20 mL of water is used per gram of Ulva. To therefore obtain the crude ulvan extract, a minimum estimated 30 mL of water (10 mL tap water and 20 mL distilled water) is used. Compared to more water-consuming process such as alginate extraction (see chapter on alginate), ulvan extraction consumed a fair amount of water.

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