The invention discloses a method for whitening
agar under assistance of an enzymatic method.
Gracilaria verrucosa is taken, put in an alkaline solution and treated at the constant temperature for 2-5h, the alkaline solution is removed, and the
gracilaria verrucosa is blanched to be neutral; water and
oxalic acid are added, the pH is adjusted with acid to range from 4.5 to 6.5, complex
enzyme is added at the temperature of 45-60 DEG C, the
gracilaria verrucosa is treated at the constant temperature for 1-3 h, an
enzyme solution is removed, and the
gracilaria verrucosa is rinsed to be neutral;a
metal chelating agent is added,
metal ions are removed, and the gracilaria verrucosa is filtered and rinsed to be neutral; a
sodium hypochlorite solution is added, and the gracilaria verrucosa is treated for 20-60 min, filtered and rinsed to be neutral; water is added, and the gracilaria verrucosa is boiled to be completely molten and then filtered for residue removal; a gel solution is rapidlycooled, slit, subpackaged, subjected to oil-pressure
dewatering, dried, crushed and sieved, and
powder is collected. The method is applied to
agar extraction through biological
blanching under assistance of chemical
blanching, usage of
chemical agents is reduced, harm to body health is reduced,
pollution to the environment is reduced, the production cost is saved, and the method has great significance for
sustainable development of
agar production enterprises.