CN109938242B - Processing method for removing fishy smell of dead fish blocks - Google Patents
Processing method for removing fishy smell of dead fish blocks Download PDFInfo
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- CN109938242B CN109938242B CN201910182918.5A CN201910182918A CN109938242B CN 109938242 B CN109938242 B CN 109938242B CN 201910182918 A CN201910182918 A CN 201910182918A CN 109938242 B CN109938242 B CN 109938242B
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Abstract
The invention discloses a processing method for removing fishy smell of dead fish blocks, which comprises the steps of pretreatment, blending fishy smell removing liquid, microflow soaking, pH adjustment, flushing, air drying and the like. The invention can effectively react or combine with or inactivate or directly remove or mask odor generating substances; so as to achieve the purpose of removing fishy smell.
Description
Technical Field
The invention relates to a processing method for removing fishy smell of dead fish blocks, belonging to the technical field of food processing.
Background
The fish meat is a good source of high-quality protein, vitamins and mineral substances, is rich in nutrition, has fine and soft mouthfeel, is particularly suitable for the old and children, and has various health care functions on human bodies. According to FAO statistics, more than 75% of the total yield of world aquatic products is sold after being processed, and the fresh sale proportion accounts for less than 25% of the total yield. Because the raw material fish has the fishy smell which is different from the particularity of other meat, the fishy smell removal becomes a key technology in the processing of fish products, and the purpose is to eliminate the influence of the fishy smell on the quality of the fish products to the maximum extent.
The fishy smell is a peculiar smell generated by components such as trimethylamine oxide, delta-aminopentanoic acid, piperidine, aldehydes, ketones or fatty acids contained in fish, and is caused by the metabolism and putrefaction of fish protein and the culture environment. The odor belongs to a relatively complex mixed odor, and the bad odor is the odor shown by the mixture of various compounds. In the prior art, a fishy smell treatment technology is developed from an initial embedding, adsorption, acid-base salt and other physicochemical methods to a green natural fishy smell removing method of a natural product, a microbial fermentation biological method and the like, and due to the complex fishy smell components and different fishy smell compounds of different raw material fishes, the single fishy smell removing method has limitation in effect. In addition, the fishy smell of dead fish is relatively difficult to remove compared with the fishy smell of live fish.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a processing method for removing fishy smell of dead fish blocks, which has more reasonable process design.
In order to achieve the purpose, the invention adopts the technical scheme that: the processing method for removing the fishy smell of the dead fish blocks comprises the following steps:
(1) pretreatment: collecting still edible dead fish, intensively removing scales, heads and viscera, and then cutting into blocks for later use;
(2) preparing fishy smell removing liquid: preparing fishy smell removing liquid, namely, pressing bay leaves: coptis chinensis: mint: 3-5% of clear water: 8-10: 15-20: decocting for 1-3 hr at weight ratio of 80-100, cooling, adding 0.5-0.8 times of rice washing water, stirring, and adding salt to adjust salinity to 1%;
(3) micro-flow soaking: conveying the fish blocks treated in the step (1) into a special soaking device for soaking for 4-6h, injecting the fishy smell removing liquid prepared in the step (2) into the soaking device in advance, enabling the liquid in the soaking device to circularly flow at the temperature of 32-35 ℃ and the speed of 0.1-0.5m/s in the soaking process, and manually oxygenating to enable oxygen in a water body to be saturated;
(4) adjusting the pH value: after micro-flow soaking, adding quicklime into the fishy smell removing liquid in the soaking equipment, uniformly stirring, adjusting the pH of the fishy smell removing liquid to 12-14 by the addition amount of the quicklime, and soaking for 2-3 h;
(5) washing and air drying: and (4) washing the fish blocks treated in the step (4) with cold boiled water for 5-8min, and then air-drying.
Preferably, the specially-made soaking equipment comprises a soaking cylinder, a hollow shaft is fixed at the center in the soaking cylinder, a plurality of fish block clamping plate assemblies are fixed on the hollow shaft through rotating bearings, each fish block clamping plate assembly is composed of a box-shaped bottom and a clamping cover matched with the box-shaped bottom in a matching manner, one end of the clamping cover is hinged with one end of the box-shaped bottom, the other ends of the clamping cover and the box-shaped bottom are buckled, a plurality of sliding grooves are formed in the inner bottom of the box-shaped bottom, the box-shaped bottom and the clamping cover are both of a net structure, filter screens matched with the box-shaped bottom and the clamping cover in size are fixed on the inner sides of the box-shaped bottom and the clamping cover, the hollow part of the hollow shaft is communicated with the space between the fish block clamping plate assemblies, and the box-shaped bottom in the fish block clamping plate assemblies is inclined downwards; the positions of the fish block clamping plate assemblies corresponding to different heights in the hollow shaft are respectively fixed with a swinging plate, the swinging plates are fixed on the hollow shaft through a supporting shaft, one end of the supporting shaft is fixed with the hollow shaft through a rotary bearing and a bearing seat, the other end of the supporting shaft extends out of the hollow shaft, a swinging rod is welded outside the wall of the soaking cylinder, fish blocks entering the hollow shaft are enabled to enter the corresponding fish block clamping plate assemblies in a directional mode through swinging of the swinging plates, and a blanking chute is fixed above the hollow part of the hollow shaft through a rack; the bottom of the hollow shaft is fixed on an output shaft of the rotating motor; a washing nozzle is fixed on the inner wall of the soaking cylinder above each fish block clamping plate component, all the washing nozzles are converged on the same water inlet pipe through a pipeline, and the water inlet pipe is connected with a pump.
Compared with the prior art, the invention has the beneficial effects that:
1. by using the fishy smell removing soaking solution, proper temperature and oxygen are kept, and the pH value is increased, so that the fishy smell removing soaking solution can effectively react with or combine with substances generating fishy smell or lose the activity of the substances or directly remove or mask the smell; so as to achieve the purpose of removing fishy smell. Can be widely applied to various aquatic products;
2. by utilizing the related fishy smell removing device, the hollow shaft can be slowly rotated at the speed of 0.1-0.5m/s when the fishy smell is removed by soaking, the hollow shaft drives the fish block clamping plate assembly to rotate to push the fishy smell removing liquid to form micro flow, and the fishy smell removing uniformity is improved by rotating the fish block clamping plate assembly by 90 degrees in the micro flow soaking process within the same fishy smell removing time, so that the fishy smell removing effect is optimized;
3. after the micro-flow soaking is carried out for a period of time, the discharge of fishy smell substances is further promoted by a pH adjusting method, and then the fishy smell substances are washed by warm boiled water and dried by air, so that the residual fishy smell in the process is more effectively removed;
4. the specially-made fishy smell removing device can realize feeding to the hollow part in the hollow shaft through the discharging chute at one time, the entering fish blocks enter the corresponding fish block clamping plate assembly under the action of the swinging plate, automatic feeding is realized, meanwhile, the fishy smell removing materials are effectively prevented from being deposited on the surfaces of the fish blocks due to the fact that the fish blocks are in the fish block clamping plate assembly, and the surface shapes of the fish blocks are guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is a top view of the structure of the present invention
Fig. 3 is a schematic structural view of the fish chunk clamp assembly of the present invention.
Detailed Description
The invention will now be further elucidated with reference to the drawing.
Example one
The processing method for removing the fishy smell of the dead fish blocks comprises the following steps:
(1) pretreatment: collecting still edible dead fish, intensively removing scales, heads and viscera, and then cutting into blocks for later use;
(2) preparing fishy smell removing liquid: preparing fishy smell removing liquid, and mixing the raw materials according to the weight ratio of salt: bay leaf, coptis, mint and clear water are 0.3: 10: 15: 100, decocting for 3 hours, cooling, adding 0.5-0.8 time of rice washing water, stirring uniformly, and adding salt to adjust the salinity to 1%;
(3) micro-flow soaking: the fish blocks processed in the step (1) are sent to a special soaking device for soaking for 4-6h, as shown in figures 1-3, the special soaking device comprises a soaking cylinder 1, a hollow shaft 2 is fixed at the center in the soaking cylinder 1, a plurality of fish block clamping plate assemblies 3 are fixed on the hollow shaft 2 through rotating bearings, each fish block clamping plate assembly 3 consists of a box-shaped bottom 31 and a clamping cover 32 which is matched with the box-shaped bottom 31 in a matching way, one end of the clamping cover 32 is hinged with one end of the box-shaped bottom 31, the other ends of the clamping cover 32 are buckled with the other end of the box-shaped bottom 31, wherein, the bottom in the box-shaped bottom 31 is provided with a plurality of sliding chutes 311, the box-shaped bottom 31 and the clamping cover 32 are both in a net structure, the inner sides of the box-shaped bottom 31 and the clamping cover 32 are both fixed with filter screens with sizes matched with the box-shaped bottom 31 and the clamping cover, the hollow part of the hollow shaft 2 is communicated with the space between the fish block clamping plate assemblies 3, and the box-shaped bottom 31 in the fish block clamping plate assemblies 3 is inclined downwards; the positions of the fish block clamping plate assemblies 3 corresponding to different heights in the hollow shaft 2 are respectively fixed with a swinging plate 4, the swinging plates 4 are fixed on the hollow shaft 2 through supporting shafts, one end of each supporting shaft is fixed with the hollow shaft 2 through a rotary bearing and a bearing seat, the other end of each supporting shaft extends out of the hollow shaft 2, a swinging rod 5 is welded outside the wall of the soaking cylinder 1, fish blocks entering the hollow shaft enter the corresponding fish block clamping plate assemblies 3 in a directional mode through swinging of the swinging plates 5, and a blanking chute 6 is fixed above the hollow part of the hollow shaft 2 through a rack; the bottom of the hollow shaft 2 is fixed on an output shaft of a rotating motor 7; a washing nozzle 8 is fixed on the inner wall of the soaking cylinder 1 above each fish block clamping plate component 3 correspondingly, all the washing nozzles 8 are collected on the same water inlet pipe 9 through pipelines, and the water inlet pipe 9 is connected with a pump; the fishy smell removing liquid prepared in the step (2) is injected into the soaking equipment in advance, and the fishy smell removing liquid in the soaking equipment circularly flows at the speed of 3-5m/s through a rotating motor 7 in the soaking process; in the soaking process, the fish block clamping plate assembly 3 turns 90 degrees from the horizontal state to be vertical, and the fishy smell removing liquid is contacted with the maximum area of the fish block clamping plate assembly 3 while rotating and soaking, so that the fishy smell removing uniformity is improved;
(4) adjusting the pH value: after micro-flow soaking, adding quicklime into the fishy smell removing liquid in the soaking equipment, uniformly stirring, adjusting the pH of the fishy smell removing liquid to 12-14 by the addition amount of the quicklime, and soaking for 3 hours;
(5) washing and air drying: and (4) washing the fish blocks treated in the step (4) with cold boiled water for 8min, and then air-drying.
Example two
The processing method for removing the fishy smell of the dead fish blocks comprises the following steps:
(1) pretreatment: collecting still edible dead fish, intensively removing scales, heads and viscera, and then cutting into blocks for later use;
(2) preparing fishy smell removing liquid: preparing fishy smell removing liquid, and mixing the raw materials according to the weight ratio of salt: coptis root, mint and clear water are 0.5: 8: decocting for 3h at a weight ratio of 20: 100, cooling, adding 0.5 times of rice washing water, stirring, adding salt, and adjusting salinity to 1%;
(3) micro-flow soaking: the fish blocks processed in the step (1) are sent to a special soaking device for soaking for 4-6h, as shown in figures 1-3, the special soaking device comprises a soaking cylinder 1, a hollow shaft 2 is fixed at the center in the soaking cylinder 1, a plurality of fish block clamping plate assemblies 3 are fixed on the hollow shaft 2 through rotating bearings, each fish block clamping plate assembly 3 consists of a box-shaped bottom 31 and a clamping cover 32 which is matched with the box-shaped bottom 31 in a matching way, one end of the clamping cover 32 is hinged with one end of the box-shaped bottom 31, the other ends of the clamping cover 32 are buckled with the other end of the box-shaped bottom 31, wherein, the bottom in the box-shaped bottom 31 is provided with a plurality of sliding chutes 311, the box-shaped bottom 31 and the clamping cover 32 are both in a net structure, the inner sides of the box-shaped bottom 31 and the clamping cover 32 are both fixed with filter screens with sizes matched with the box-shaped bottom 31 and the clamping cover, the hollow part of the hollow shaft 2 is communicated with the space between the fish block clamping plate assemblies 3, and the box-shaped bottom 31 in the fish block clamping plate assemblies 3 is inclined downwards; the positions of the fish block clamping plate assemblies 3 corresponding to different heights in the hollow shaft 2 are respectively fixed with a swinging plate 4, the swinging plates 4 are fixed on the hollow shaft 2 through supporting shafts, one end of each supporting shaft is fixed with the hollow shaft 2 through a rotary bearing and a bearing seat, the other end of each supporting shaft extends out of the hollow shaft 2, a swinging rod 5 is welded on the wall of the soaking cylinder 1 after extending out of the hollow shaft 2, fish blocks entering the hollow shaft 2 directionally slide into the corresponding fish block clamping plate assemblies 3 through the swinging of the swinging rods 5, and a blanking chute 6 is fixed above the hollow part of the hollow shaft 2 through a rack; the bottom of the hollow shaft 2 is fixed on an output shaft of a rotating motor 7; a washing nozzle 8 is fixed on the inner wall of the soaking cylinder 1 above each fish block clamping plate component 3 correspondingly, all the washing nozzles 8 are collected on the same water inlet pipe 9 through pipelines, and the water inlet pipe 9 is connected with a pump; the fishy smell removing liquid prepared in the step (2) is injected into the soaking equipment in advance, and the fishy smell removing liquid in the soaking equipment circularly flows at the speed of 3-5m/s through a rotating motor 7 in the soaking process; in the soaking process, the fish block clamping plate assembly 3 turns 90 degrees from the horizontal state to be vertical, and the fishy smell removing liquid is contacted with the maximum area of the fish block clamping plate assembly 3 while rotating and soaking, so that the fishy smell removing uniformity is improved;
(4) adjusting the pH value: after micro-flow soaking, adding quicklime into the fishy smell removing liquid in the soaking equipment, uniformly stirring, adjusting the pH of the fishy smell removing liquid to 12-14 by the addition amount of the quicklime, and soaking for 2 h;
(5) washing and air drying: and (4) washing the fish blocks treated in the step (4) with cold boiled water for 5min, and then air-drying.
Claims (1)
1. A processing method for removing fishy smell of dead fish blocks comprises the following steps:
(1) pretreatment: collecting still edible dead fish, intensively removing scales, heads and viscera, and then cutting into blocks for later use;
(2) preparing fishy smell removing liquid: preparing fishy smell removing liquid, namely, pressing bay leaves: coptis chinensis: mint: 3-5% of clear water: 8-10: 15-20: decocting for 1-3 hr at weight ratio of 80-100, cooling, adding 0.5-0.8 times of rice washing water, stirring, and adding salt to adjust salinity to 1%;
(3) micro-flow soaking: conveying the fish blocks treated in the step (1) into a special soaking device for soaking for 4-6h, injecting the fishy smell removing liquid prepared in the step (2) into the soaking device in advance, enabling the liquid in the soaking device to circularly flow at the temperature of 32-35 ℃ and the speed of 0.1-0.5m/s in the soaking process, and manually oxygenating to enable oxygen in a water body to be saturated; the special soaking equipment comprises a soaking cylinder, a hollow shaft is fixed in the center of the soaking cylinder, a plurality of fish block clamping plate assemblies are fixed on the hollow shaft through rotating bearings, each fish block clamping plate assembly is composed of a box-shaped bottom and a clamping cover matched with the box-shaped bottom in a matching mode, one end of the clamping cover is hinged with one end of the box-shaped bottom, the other ends of the box-shaped bottom and the clamping cover are buckled, a plurality of sliding chutes are formed in the inner bottom of the box-shaped bottom, the box-shaped bottom and the clamping cover are both of a net-shaped structure, filter screens matched with the box-shaped bottom and the clamping cover in size are fixed on the inner sides of the box-shaped bottom and the clamping cover, the hollow part of the hollow shaft is communicated with the space between the fish block clamping plate assemblies, and the box-shaped bottom in the fish block clamping plate assemblies is inclined downwards; the positions of the fish block clamping plate assemblies corresponding to different heights in the hollow shaft are respectively fixed with a swinging plate, the swinging plates are fixed on the hollow shaft through a supporting shaft, one end of the supporting shaft is fixed with the hollow shaft through a rotary bearing and a bearing seat, the other end of the supporting shaft extends out of the hollow shaft, a swinging rod is welded outside the wall of the soaking cylinder, fish blocks entering the hollow shaft are enabled to enter the corresponding fish block clamping plate assemblies in a directional mode through swinging of the swinging plates, and a blanking chute is fixed above the hollow part of the hollow shaft through a rack; the bottom of the hollow shaft is fixed on an output shaft of the rotating motor; a washing nozzle is fixed on the inner wall of the soaking cylinder corresponding to the upper part of each fish block clamping plate assembly, all the washing nozzles are collected on the same water inlet pipe through a pipeline, and a pump is connected to the water inlet pipe;
(4) adjusting the pH value: after micro-flow soaking, adding quicklime into the fishy smell removing liquid in the soaking equipment, uniformly stirring, adjusting the pH of the fishy smell removing liquid to 12-14 by the addition amount of the quicklime, and soaking for 2-3 h;
(5) washing and air drying: and (4) washing the fish blocks treated in the step (4) with cold boiled water for 5-8min, and then air-drying.
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2019
- 2019-03-12 CN CN201910182918.5A patent/CN109938242B/en active Active
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