Distribution Of Effective Resources During The Fresh Kelp Blanching

Kelp machining is one of the pillar industries of aquatic products processing, saltedkelp is an important part of China’s seaweed food processing. Recent years, as the saltedkelp processing volume increased, the use of effective resources in fresh kelp blanchingwater get more and more people’s attention. Fresh kelp blanching water is rich in iodine,mannitol, fucoidin and other effective resources that have important economic value,make full use of the resources has important significance in improving the comprehensiveutilization of resources of kelp, increasing the output of seaweed processing industry andreducing emissions of pollutants.This paper analyzes the distribution of iodine, mannitol, fucoidin in fresh kelpbleaching process by simulating the blanching process. Determine the maximum of eachcomponent can reach in different time, as well as the processed kelp mass for reaching thebalance point. That provides a theoretical basis that chooses the right kelp and blanchingwater proportions, as well as the timing of replacement of blanching water at the actualproduction. Explore the effect of adding the rinsing process optimization for theextraction of effective resources, by increasing rinsing process twice based on the originalthe blanching process.1. To track the change of effective resources in fresh kelp machining (early April-the end of July). The results of the experiment show that with kelp growth and maturationin fresh kelp machining period the iodine content in seaweed increased by270mg/kg to700mg/kg, the mannitol content increased by100g/kg to180g/kg. The content of iodineand mannitol is also stable in a corresponding value when kelp stops growing and mature,while the fucoidin content stable between47-49g/kg throughout all the process.2. The results of explore kelp growth and maturation of the blanching process showthat: with kelp growth and maturity, the maximum content of iodine and mannitol inblanching water increased, and when kelp stops growth the maximum content have stabilized; but the maximum content of fucoidin in blanching water decreased as kelpgrow.3. Determination of the distribution of effective components by simulating kelpblanching-the rinsing process, the results show that: the content of iodine, mannitol andfucoidin in blanching, rinse water increased, with the amount of treatment kelp increased.But up to a certain amount of kelp processing degree, the effective components inblanching, rinse water stabilized. The amount of kelp for reach the maximum of the threecomponents is slightly different.4．Study the ratio of extraction effective components of kelp found that the ratio ofextraction effective component of kelp decreased as the amount of kelp that the blanching,rinse water handled increased.5. The study of added twice rinsing process affect kelp effective componentsextracted showed that: the rinsing process can be more substantial upgrade the extractionratio of kelp iodine, mannitol and fucoidin, where iodine extraction ratio increased morethan15%, mannitol extraction ratio increased more than10%, fucoidin extraction ratiocan be increased to around6%, at the effective extraction stage.6. The sample simulation experiment proves that the distribution of the different kelpeffective component is consistent at the same blanching, rinsing conditions. As theblanching and rinse sufficient, the blanching water iodine and mannitol content is higherthan the rinse water, the rinse water higher than the remaining kelp; but the fucoidancontent is highest in the remaining kelp, and the blanching water is higher than the rinsewater.7. Explored the membrane concentrated effect of effective components in blanchingwater with different molecular weight cutoff (8000,2500,200), the results showed that:for iodine all three have no concentration effect; molecular weight cutoff of8000is thebest choice for fucoidin concentrate, only the membrane that molecular weight cutoff of200has concentration effect for mannitol.