Carrageenan Production

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An integrated method is developed to utilize to a maximum extent the fresh biomass of seaweeds such as Kappaphycus alvarezii that can be crushed to release sap and where the sap is useful as a potent liquid fertilizer after suitable treatment with additives and dilution while the residue is a superior raw material for extraction of κ-carrageenan, thereby enhancing the value of the seaweed. Other advantages of the invention include a reduced drying time and drying area to obtain the raw material for κ-carrageenan production in dry and storable form, a reduced cost of transporting and storing this raw material because of its lesser bulk, easier handling due to its free flowing granular nature, and its direct use for gel preparation in certain applications.Inventors: Karuppanan Eswaran, Pushpito Kumar Ghosh, Arup Kumar Siddhanta, Jinalal Shambhubhai Patolia,Chellaiah Periyasamy, Aditya Shantibhai Mehta, Kalpana Haresh Mody, Bharatkumar Kalidas Ramavat, Kamalesh Prasad, Mahesh Rameshchandra Rajyaguru, Singaram Kulandaivel Chennur Radhakrishna Reddy, Jayant Batukrai Pandya, Akhilesh Tewari Original Assignee: Council of Scientific & Industrial Research Primary Examiner: C. Sayala

Attorney: Foley & Lardner LLP
Current U.S. Classification: 71/23; 71/64.1
International Classification: C05F011/00

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Cited Patent| Filing date| Issue date| Original Assignee| Title| US3630710| Jan 31, 1969| Dec 2, 1971| | PRODUCTION OF METABOLIC DEMAND SEAWEED- TYPE FERTILIZER| US5201930| Sep 30, 1991| Apr 13, 1993| Aqua-10 Corporation| Plant growth product| Claims

1. A novel integrated process for the preparation of seaweed liquid fertilizer and free flowing phycocolloid-containing solid residue, said process consisting of steps performed in the order of: a. harvesting seaweed from the sea and removing silt and extraneous matter; b. homogenizing the seaweed in a grinder-cum-mixer to obtain a slurry; c. filtering the resultant slurry to obtain a powder residue and a sap separately; d. drying the wet powder residue till the moisture content is <25 weight %, e. extracting phycocolloid from dried powder residue by known methods or alternatively using it directly in certain applications; f. adding a suitable preservative into the sap and optionally concentrating the sap to reduce volume for lower packaging and transport cost, and optionally, g. diluting the sap and adding suitable wetting agent for seed and foliar spray applications as appropriate. 2. A process as claimed in claim 1, wherein in step (c) the filtering is done using a muslin cloth or a filter press. 3. A process as claimed in claim 1, wherein in step (d) solar drying of wet powder residue is carried out. 4. A process as claimed in claim 1, wherein in step (f) the sap is concentrated through a solar evaporation or membrane processes. 5. A process as claimed in claim 1, wherein the seaweed is selected from the class of red and brown seaweed. 6. A process as claimed in claim 1, wherein the sap from fresh seaweed is obtained by breaking cells of the seaweed with the help of mechanical action of a device, a grinder-cum-mixer, or sugar cane juice expeller. 7. A process as claimed in claim 1, wherein the sap can be separated by known methods of filtration, filtration through a muslin cloth or filter press or through the method of centrifugation. 8. A process as claimed in claim 1, wherein the filtered sap contains 0.1-2.0% K2O, micronutrients and growth promoting substances. 9. A process as claimed in claim 1, wherein the sap considered as 100% in concentration is diluted with water to a concentration (v/v) of 0.1-100%. 10. A process as claimed in claim 1, wherein a preservative, a buffering agent, formaldehyde, alcohol or sodium benzoate is added to the sap or its dilutions in the range of 0.1-5% w/v. 11. A process as claimed in claim 1, wherein the sap can be...
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