A method for preparing algae powder by drying cyanobacteria without peculiar smell

A technology with no peculiar smell and cyanobacteria, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as polluting the atmospheric environment and reducing the quality of algae powder, so as to reduce losses and reduce the production of cyanobacteria odorous molecules. Effect

Active Publication Date: 2019-03-19
JIANGNAN UNIV
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  • Abstract
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Problems solved by technology

The production of these odorous substances not only reduces the quality of algae powder, but also pollutes the atmospheric environment

Method used

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  • A method for preparing algae powder by drying cyanobacteria without peculiar smell
  • A method for preparing algae powder by drying cyanobacteria without peculiar smell
  • A method for preparing algae powder by drying cyanobacteria without peculiar smell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In order to obtain 1 ton of algae powder with a moisture content of 7%, the algae mud with a moisture content of 60%, 70%, 80%, and 90% were dried at a drying temperature of 280°C. After testing, it was found that the consumed The algae mud is 2.325t, 3.1t, 4.65t, 9.33t, the evaporated water is 1.325t, 2.1t, 3.65t, 8.33t, the material residence time is 6s, 15s, 25s, 50s, and the protein content is 48%. . After treatment, the measured odor concentration is 260, 950, 1200, 2000, and the tail gas is discharged through the 30m height exhaust pipe, which meets the GB14554-93 "Emission Standard of Odor Pollutants".

Embodiment 2

[0035] 10 tons of blue-green algae materials with a moisture content of 85% are pumped into the drying main machine for drying, and the hot flue gas is sent into the main machine by the blower. The drying temperature is set at 260 ° C, and the blue-green algae is dried, heat-transferred, and mass-transferred in it. , and finally, after being collected and dedusted by the first-stage cyclone fan and bag filter, the material enters the material cooling and packaging system through the closed fan, and the tail gas generated enters the biological deodorization system for treatment.

[0036] By setting the residence time of the material to be 30s, the moisture content is 8%, the protein content is 40%, and the ash content is 30% through testing the dried material.

[0037] For the tail gas measurement after drying, the dimethyl disulfide produced is taken as the detection item, and the concentration is 0.5kg / h in the 30m exhaust pipe. The gas emission standard complies with GB14554-...

Embodiment 3

[0039] Similarly, 10 tons of cyanobacteria with a moisture content of 85% were dried, the drying temperature was set at 240°C, and the material residence time was set at 100s. By testing the dried material, the moisture content was 10%, and the protein content was 25%. %, the ash content is 40%.

[0040] The tail gas produced after drying is also measured with dimethyl disulfide as the detection item in a 30m exhaust pipe. The concentration is 1.9kg / h, and the gas emission does not meet the GB14554-93 "Emission Standard of Odor Pollutants".

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Abstract

The invention discloses a method for preparing algae powder by drying no-odor blue algae, which belongs to the technical field of drying. The method of the invention is divided into a cyanobacteria drying part and a tail gas deodorizing part. According to the method of the present invention, the moisture content of the algae powder is not more than 10%, the protein content is not less than 30%, and the ash content is not more than 50%, which can remove geosmin, dimethyl disulfide, dimethyl isobutyrol, dimethyl Characteristic odor components such as trisulfide, phenol, and methyl indole. Compared with low-temperature and long-term drying, rapid drying can not only greatly reduce the production of cyanobacteria odorous molecules, but also ensure the quality of cyanobacteria dry powder and reduce the loss of protein content. Therefore, the present invention has the advantages of less energy consumption, low operating cost, and can effectively reduce the molecular weight of malodorous produced in the drying of blue-green algae.

Description

technical field [0001] The invention relates to a method for preparing algal powder by drying cyanobacteria without peculiar smell, and belongs to the technical field of drying. Background technique [0002] At present, the high-temperature evaporative drying process is widely used in industrial production, such as: spray drying in the yeast industry, high-temperature drying of products in the fertilizer industry, and drying of dregs in the pharmaceutical industry. The raw materials of organic matter are decomposed into volatile small molecule substances VOCs (volatile organic compounds) or SVOCs (semi-volatile organic compounds) under high temperature conditions, and the higher the temperature, the stronger the odor. [0003] Spirulina will also produce volatile odor compounds during the drying process. Most of the odor compounds are volatile secondary metabolites produced by algae. Sulfur-containing organic compounds produced by the decomposition of cyanobacteria are the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20B01D50/00B01D53/84B01D53/48B01D53/72
CPCB01D53/48B01D53/72B01D53/84C12N1/20B01D2257/90B01D2257/704B01D2257/306B01D50/20Y02A50/20
Inventor 杨海麟冯守帅王韬王武张玲
Owner JIANGNAN UNIV
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