Method for recycling protein from fish soluble

Abstract

The invention discloses a method for recycling protein from fish soluble. The method comprises the following process stages: a first stage, regulating pH of the fish soluble, primarily flocculating protein in the fish soluble by adopting Arabic gum; a second stage, taking clear liquid after flocculation in the first stage, and adding sodium alginate and a ferric chloride flocculating agent for carrying out flocculation for the second time; a third stage, taking the clear liquid after flocculation in the second stage, and adding sodium alginate and chitosan for carrying out flocculation for the second time. The method for recycling the protein from the fish soluble adopts a natural polymer organic flocculating agent, no ingredient harmful to a human body is introduced, a process is simple, safe and reliable, operating cost is low, hierarchical flocculation is adopted, flocculation time is greatly shortened, protein in the fish soluble is recycled more effectively, and economic benefit and environmental benefit are obtained.

Description

technical field

[0001] The invention relates to a wastewater treatment method, in particular to a treatment method for rapidly recovering protein in wastewater. Background technique

[0002] In the process of fishmeal processing, every ton of fishmeal produced produces 2-3 tons of fish juice. The protein content in fish juice is as high as 8%, and the essential amino acids are complete, with high nutritional value. Discharging fish juice as wastewater not only wastes resources but also causes environmental pollution. At present, the protein recovery methods in fish juice mainly include membrane separation method and flocculation method. The cost of recovering protein in fish juice by membrane technology is relatively high, and the cost of recovering protein in fish juice by flocculation is low, but there are problems such as long flocculation time, easy deterioration of protein, long production cycle, and food safety hazards in chemically synthesized flocculants. . In pa...

Examples

Embodiment 1

[0031] Take the fish juice, adjust the pH with 1mol / L dilute hydrochloric acid, then add the gum arabic at a ratio of 30:1 between protein and gum arabic. Stir quickly for flocculation and let stand for 30 minutes. Centrifugal separation, take the supernatant for secondary flocculation, add sodium alginate and ferric chloride, carry out flocculation reaction, after standing for 30 minutes, filter and take the supernatant for tertiary flocculation, add sodium alginate and chitosan, Stir quickly to mix well, then stir slowly to flocculate and let stand for 20 minutes. The total process took less than three hours, and the three flocculated precipitates were collected and spray-dried. After determination, the protein recovery rate reached 83%.

Embodiment 2

[0033] Take the fish juice, adjust the pH with 1mol / L dilute hydrochloric acid, then add gum arabic at a ratio of 40:1 between protein and gum arabic, and fully dissolve the gum arabic in advance with a small amount of water. After adding, mix evenly, then slowly stir and flocculate, and let it stand for 30 minutes. Centrifuge, take the supernatant for secondary flocculation, add sodium alginate and ferric chloride, mix well, stir slowly for flocculation, and let stand for 30 minutes. Siphon the supernatant to carry out three-stage flocculation, add sodium alginate and chitosan, mix thoroughly, then stir slowly for flocculation, and let it stand for 30 minutes. The total process took less than three hours, and the three flocculated precipitates were collected and vacuum-dried. After determination, the protein recovery rate was 85%.

technical field

[0001] The invention relates to a wastewater treatment method, in particular to a treatment method for rapidly recovering protein in wastewater. Background technique

[0002] In the process of fishmeal processing, every ton of fishmeal produced produces 2-3 tons of fish juice. The protein content in fish juice is as high as 8%, and the essential amino acids are complete, with high nutritional value. Discharging fish juice as wastewater not only wastes resources but also causes environmental pollution. At present, the protein recovery methods in fish juice mainly include membrane separation method and flocculation method. The cost of recovering protein in fish juice by membrane technology is relatively high, and the cost of recovering protein in fish juice by flocculation is low, but there are problems such as long flocculation time, easy deterioration of protein, long production cycle, and food safety hazards in chemically synthesized flocculants. . In pa...

Examples

Embodiment 1

[0031] Take the fish juice, adjust the pH with 1mol / L dilute hydrochloric acid, then add the gum arabic at a ratio of 30:1 between protein and gum arabic. Stir quickly for flocculation and let stand for 30 minutes. Centrifugal separation, take the supernatant for secondary flocculation, add sodium alginate and ferric chloride, carry out flocculation reaction, after standing for 30 minutes, filter and take the supernatant for tertiary flocculation, add sodium alginate and chitosan, Stir quickly to mix well, then stir slowly to flocculate and let stand for 20 minutes. The total process took less than three hours, and the three flocculated precipitates were collected and spray-dried. After determination, the protein recovery rate reached 83%.

Embodiment 2

[0033] Take the fish juice, adjust the pH with 1mol / L dilute hydrochloric acid, then add gum arabic at a ratio of 40:1 between protein and gum arabic, and fully dissolve the gum arabic in advance with a small amount of water. After adding, mix evenly, then slowly stir and flocculate, and let it stand for 30 minutes. Centrifuge, take the supernatant for secondary flocculation, add sodium alginate and ferric chloride, mix well, stir slowly for flocculation, and let stand for 30 minutes. Siphon the supernatant to carry out three-stage flocculation, add sodium alginate and chitosan, mix thoroughly, then stir slowly for flocculation, and let it stand for 30 minutes. The total process took less than three hours, and the three flocculated precipitates were collected and vacuum-dried. After determination, the protein recovery rate was 85%.