CN100559951C - A kind of refrigerated fresh keeping method for daylily - Google Patents

A kind of refrigerated fresh keeping method for daylily Download PDF

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Publication number
CN100559951C
CN100559951C CNB2006100523743A CN200610052374A CN100559951C CN 100559951 C CN100559951 C CN 100559951C CN B2006100523743 A CNB2006100523743 A CN B2006100523743A CN 200610052374 A CN200610052374 A CN 200610052374A CN 100559951 C CN100559951 C CN 100559951C
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Prior art keywords
day lily
fresh keeping
keeping method
daylily
refrigerated
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Expired - Fee Related
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CNB2006100523743A
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CN1875726A (en
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茅林春
潘炘
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

The invention discloses a kind of refrigerated fresh keeping method for daylily, may further comprise the steps: (1) rinsing: day lily is soaked in aqueous solution of chlorine dioxide floated; (2) drain; Precooling: in 2~4 ℃ of precoolings; (3) ozone treatment: ozone concentration is 3~6mg/m 3, the processing time is 3~6 hours; (4) freshness protection package of packing into; (5) add antistaling agent: (6) are that 0.2~0.3% the antistaling agent of day lily is placed in the freshness protection package with weight; (7) storage: refrigerated storage temperature is 2~4 ℃.Adopt the inventive method, fresh day lily storage still kept fresh quality in 2 months.

Description

A kind of refrigerated fresh keeping method for daylily
Technical field
The present invention relates to the storage technique of vegetables, particularly a kind of can sterilization, absorb the long-time method for storing and refreshing of ethene.
Background technology
Day lily is nutritious, and vitamin, protein, sugar and content of mineral substances are higher, and has special health care and medicinal function, thereby is a kind of precious vegetables.Because it is fresh-keeping that day lily is difficult to, so preserve again and sell after the system of day lily dehydration is all the time done.In recent years, directly be subjected to consumer's favor with the mode of fresh day lily culinary art, the market demand of fresh day lily heightens.The picking time of day lily mainly mid or late May to early or mid October, the back of gathering just began brown stain and decay on the 2nd day under 25 ℃~30 ℃ temperature, the initial stage shows as the bud flavescence, flower bud appears out in the later stage, even rots, sense organ and edible quality descend.Existing refrigerated fresh keeping method for daylily is to preserve in freezer after day lily is packed with the common polythene bag film, and storage ﹠ fresh-keeping period generally about 20 days, also far can not adapt to the long-term needs of market to fresh day lily.
Summary of the invention
At the deficiencies in the prior art part, the invention provides a kind of can sterilization, absorb the long-time method for storing and refreshing of ethene.
Refrigerated fresh keeping method for daylily of the present invention may further comprise the steps:
(1) rinsing: day lily soaked in aqueous solution of chlorine dioxide float;
(2) drain;
(3) precooling: in 2~4 ℃ of precoolings;
(4) ozone treatment: ozone concentration is 3~6mg/m 3, the processing time is 3~6 hours;
(5) freshness protection package of packing into;
(6) add antistaling agent: with weight is that 0.2~0.3% the antistaling agent of day lily is placed in the freshness protection package;
(7) storage: refrigerated storage temperature is 2~4 ℃.
Soaking the time of floating in the described step (1) is 5~8 minutes, and the weight ratio of day lily and ClO 2 solution is 1: 5.
The proportioning of the aqueous solution of chlorine dioxide in the described step (1) is volume ratio 1: 500.
Precooling is 8~12 hours in the described step (3).
Ozone concentration is 4~6mg/m in the described step (4) 3
Freshness protection package in the described step (5) is the low-density polyethylene film dress of 0.03~0.05mm thickness.
Used antistaling agent serve as reasons inhale ethylene agent, sodium hydrogensulfite and silica gel by weight 2: 1: 1 mixed preparing form.
Antistaling agent encapsulates with the high tea bag paper of gas permeability.
The manufacture method of suction ethylene agent wherein may further comprise the steps successively:
(1) with sulfuric acid modulation pH value is 3 acidic aqueous solution;
(2) in acidic aqueous solution, add potassium permanganate, make the liquor potassic permanganate of 20~25% concentration;
(3) in liquor potassic permanganate, drop into activated carbon, become sticky shape to solution, in 45 ℃ of temperature, placed 20 minutes then, use 100 ℃ of hot blast dryings at last, become the suction ethylene agent.
Day lily preservation method of the present invention is on the basis of low temperature and freshness protection package packing, in conjunction with adopting ozone sterilization and absorbing the complex art of ethene, can slow down effectively the day lily bud brown stain, open flower bud, rotten.Adopt the inventive method, fresh day lily storage still kept fresh quality in 2 months.
The specific embodiment
The invention will be further described below in conjunction with embodiment.
The antistaling process flow process of fresh day lily is: and day lily gathers → rinsing → drain → and precooling → ozone treatment → day lily freshness protection package → interpolation antistaling agent → freshness protection package of packing into seals → refrigerates.The concrete operations main points are described below in order:
Pluck day lily, pick out disease and pest or damaged day lily; Day lily soaked in aqueous solution of chlorine dioxide (v/v 1: 500) float 5~8 minutes, the weight ratio of day lily and ClO 2 solution is 1: 5; Day lily is after the ClO 2 solution sterilization, and in pack into frame of plastic or other container, drop removes the rinsing liquid on surface; Day lily after draining was put into 2~Cool Room 4 8~12 hours, and day lily is opened the ozone generator in the freezer in freezer in the precooling, made that ozone concentration reaches 4~6mg/m in the storehouse 3, should seal freezer during the ozone treatment; Day lily is through after the pre-cold-peace ozone treatment, and the low-density polyethylene film of 0.03~0.05mm thickness of packing into is adorned freshness protection package, and the about 10kg of every packed amount is advisable; The ratios (addition is 0.2~0.3%) of placing 4~6 bag antistaling agents according to every 10kg day lily are placed in antistaling agent in the freshness protection package; Envelope is pricked fresh-keeping sack, and refrigerated storage temperature is 2~4 ℃.
Dirt to all right eccysis day lily surface of day lily sterilization; Precooling can reduce the body temperature of day lily rapidly in freezer, can quicken to get rid of simultaneously the moisture on day lily surface; Ozone not only has bactericidal action, also can eliminate the also generation of ethene suppressing, and the contraction of induced tissue epidermis pore, can reduce and organize moisture to reduce, and has sterilization and anticorrosion and the double action that prevents physiological aging; Should seal freezer during the ozone treatment, prevent the leakage of ozone, the personnel that prevent simultaneously enter freezer; Potassium permanganate in the antistaling agent is mainly used in absorbs the ethene that the day lily bud discharges, the breeding of day lily microbial pathogens during sodium hydrogensulfite is used for preventing to refrigerate; Too low temperature causes that easily damaging to plants caused by sudden drop in temperature appears in day lily, should note avoiding the fluctuation of temperature of ice house during refrigeration.
The computing formula of the available machine time of ozone generator is: the available machine time (h)=[ozone concentration (mg/m that needs 3) * storage capacity (m 3)]/[ozone output of ozone generator (mg/h)].
With the fresh-keeping day lily of said method, preserve after 2 months and still keep fresh outward appearance and edible quality.The inventive method has overcome the fresh-keeping difficult problem of fresh day lily effectively, has excellent application value and huge economic benefit.
Embodiment 1:
(1) plucks day lily, pick out disease and pest or damaged day lily.
(2) day lily 100kg being put into 500kg aqueous solution of chlorine dioxide (v/v 1: 500) soaks and floats 5 minutes.
(3) day lily is after the ClO 2 solution sterilization, and in the container of packing into, drop removes the rinsing liquid on surface.
(4) day lily after draining was put into 3 ℃ of freezers 12 hours.
(5) day lily is opened the ozone generator in the freezer in freezer in the precooling, makes that ozone concentration reaches 5mg/m in the storehouse 3, should seal freezer during the ozone treatment.
(6) day lily is through after the pre-cold-peace ozone treatment, and the low-density polyethylene film of the 0.04mm thickness of packing into is adorned freshness protection package, every packed amount 10kg, and freshness protection package wouldn't seal.
(7) every 10kg day lily is placed 5 bag antistaling agents, and antistaling agent is placed in the freshness protection package.
(8) refrigeration, temperature of ice house is 3 ℃.
Used antistaling agent preparation:
200g is inhaled ethylene agent, 100g sodium hydrogensulfite, 100g silica gel to mix.
Refrigerate after 2 months, day lily keeps fresh color and luster, does not obviously turn to be yellow or putrefactive phenomenon, and commodity rate reaches about 90%.
Inhale the preparation method of ethylene agent
(1) with sulfuric acid modulation pH value is 3 acidic aqueous solution;
(2) in the 100kg acidic aqueous solution, add 25kg potassium permanganate, make liquor potassic permanganate;
(3) in the 100kg liquor potassic permanganate, drop into the 20kg activated carbon, become sticky shape to solution, in 45 ℃ of temperature, placed 20 minutes then, use 100 ℃ of hot blast dryings at last, become the suction ethylene agent.
At last, it is also to be noted that what more than enumerate only is several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.

Claims (8)

1, a kind of refrigerated fresh keeping method for daylily, its feature may further comprise the steps successively:
(1) rinsing: day lily soaked in aqueous solution of chlorine dioxide float;
(2) drain;
(3) precooling: in 2~4 ℃ of precoolings;
(4) ozone treatment: ozone concentration is 3~6mg/m 3, the processing time is 3~6 hours;
(5) freshness protection package of packing into;
(6) add antistaling agent: with weight is that 0.2~0.3% the antistaling agent of day lily is placed in the freshness protection package;
(7) storage: refrigerated storage temperature is 2~4 ℃.
2, a kind of refrigerated fresh keeping method for daylily according to claim 1 is characterized in that: soaking the time of floating in the described step (1) is 5~8 minutes, and the weight ratio of day lily and ClO 2 solution is 1: 5.
3, a kind of refrigerated fresh keeping method for daylily according to claim 1 is characterized in that: the proportioning of the aqueous solution of chlorine dioxide in the described step (1) is volume ratio 1: 500.
4, a kind of refrigerated fresh keeping method for daylily according to claim 1 is characterized in that: precooling is 8~12 hours in the described step (3).
5, a kind of refrigerated fresh keeping method for daylily according to claim 1 is characterized in that: ozone concentration is 4~6mg/m in the described step (4) 3
6, a kind of refrigerated fresh keeping method for daylily according to claim 1 is characterized in that: the freshness protection package in the described step (5) is the low-density polyethylene film dress of 0.03~0.05mm thickness.
7, a kind of refrigerated fresh keeping method for daylily according to claim 1 is characterized in that: used antistaling agent serve as reasons inhale ethylene agent, sodium hydrogensulfite and silica gel by weight 2: 1: 1 mixed preparing form;
The manufacture method of suction ethylene agent wherein may further comprise the steps successively:
(1) with sulfuric acid modulation pH value is 3 acidic aqueous solution;
(2) in acidic aqueous solution, add potassium permanganate, make the liquor potassic permanganate of 20~25% concentration;
(3) in liquor potassic permanganate, drop into activated carbon, become sticky shape to solution, in 45 ℃ of temperature, placed 20 minutes then, use 100 ℃ of hot blast dryings at last, become the suction ethylene agent.
8, a kind of refrigerated fresh keeping method for daylily according to claim 7 is characterized in that: antistaling agent encapsulates with the high tea bag paper of gas permeability.
CNB2006100523743A 2006-07-07 2006-07-07 A kind of refrigerated fresh keeping method for daylily Expired - Fee Related CN100559951C (en)

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CN100559951C true CN100559951C (en) 2009-11-18

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Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102885133A (en) * 2012-10-24 2013-01-23 江苏省农业科学院 Dried lily flower preservative as well as preparation method and application thereof
CN103129819B (en) * 2013-03-07 2015-02-11 国家农产品保鲜工程技术研究中心(天津) Air-controlled freshness protection bag for storing young garlic shoots and application thereof
CN103283819B (en) * 2013-04-19 2014-05-07 四川省宕府王食品有限责任公司 Processing method for vacuum freeze drying of Hemerocallis fulva L.
CN103284086A (en) * 2013-04-19 2013-09-11 四川省宕府王食品有限责任公司 Pretreatment method for raw materials used in processing of dried Hemerocallis fulva L.
CN103211006B (en) * 2013-04-24 2014-07-16 祁东县兴臣黄花菜种植专业合作社 Freshness retaining and de-enzyming agent for day lily
CN103315049B (en) * 2013-06-15 2016-09-07 徐州天马敬安食品有限公司 A kind of preparation method exporting fresh-keeping broccoli
CN103815212B (en) * 2014-03-20 2015-09-02 齐鲁工业大学 A kind of method reducing Colchicine Content in day lily
CN104430830A (en) * 2014-11-25 2015-03-25 贵州大自然科技有限公司 Fresh-keeping method for palm buds
CN104886233A (en) * 2015-06-03 2015-09-09 中国农业科学院果树研究所 A freshness retaining method to prolong Xueqing pear storage time
CN105341142A (en) * 2015-11-09 2016-02-24 中国农业科学院果树研究所 Red fragrant pear storage fresh-keeping method
CN106135386A (en) * 2016-06-22 2016-11-23 浙江省农业科学院 A kind of preservation method of Fructus Mori fresh fruit
CN106942358A (en) * 2017-04-24 2017-07-14 南京农业大学 A kind of preservation method of fresh-cut coriander
CN107343529A (en) * 2017-07-11 2017-11-14 贵州省苑博生态农业开发有限公司 A kind of Kiwi berry cold preserving method and preservation method
CN115886064A (en) * 2022-12-09 2023-04-04 宁夏黄河中药材有限公司 Low-cost fresh-keeping method for fresh broccoli

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