CN104839378A - Tea pesticide residue removing process - Google Patents
Tea pesticide residue removing process Download PDFInfo
- Publication number
- CN104839378A CN104839378A CN201510202340.7A CN201510202340A CN104839378A CN 104839378 A CN104839378 A CN 104839378A CN 201510202340 A CN201510202340 A CN 201510202340A CN 104839378 A CN104839378 A CN 104839378A
- Authority
- CN
- China
- Prior art keywords
- tea
- residual
- resin
- agriculture
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Tea And Coffee (AREA)
Abstract
The invention discloses a tea pesticide residue removing process which is characterized by taking finished tea, semi-finished tea or fresh tea leaves as raw materials; carrying out blending, low-temperature water extraction, membrane filtration, reverse osmosis membrane condensation, resin adsorption and disinfection on the raw materials to obtain a pesticide-residue-removed tea concentrated solution; and carrying out spray drying to obtain pesticide-residue-removed instant tea powders. The pesticide residues in the obtained tea concentrated solution and the instant tea powders are not detected; effective constituents, such as tea polyphenol, caffeine, tea polysaccharide and theanine and the like in the tea concentrated solution and the instant tea powders are reserved to the maximum degree; and the original tea color and fragrance are reserved fully. After the tea concentrated solution and the instant tea powders are diluted or dissolved, the tea is clear and transparent, is free of residues, and can be drunk directly. The process can realize industrialized production and has substantial economic and social benefits.
Description
Technical field
The invention belongs to the residual field of agricultural production pint agriculture, be specifically related to a kind of tealeaves and take off the residual technique of agriculture.
Background technology
As everyone knows, need to spray insecticide to prevent disease and pest in the planting process of tealeaves, and the use of agricultural chemicals will inevitably produce residual in plant.Although agricultural chemicals used is at present organophosphorus pesticide substantially, belong to the compound of easily degraded, often compare at the agricultural chemicals of tealeaves inner accumulation and be difficult to decompose, the tea concentrate made of these tealeaves and the agriculture of instant tea powder is residual often exceeds standard.
Extraction factory in, ozone is directly passed in tea extract and carries out oxidation reaction by people usually, removes residues of pesticides with this, but due to the solubility of ozone in water lower, this method poor effect; The most effectively prevent the residual super calibration method of tea extract agriculture from being pick up from source at present, Shaoshi agricultural chemicals, thus the agriculture controlling tea extract is residual.But no pesticide grown often causes the disease and pest of plant to increase, output reduces.So people begin one's study and reduce the residual method of agriculture in the product, but all cannot realize industrialization.
Summary of the invention
A kind of tealeaves is the object of the present invention is to provide to take off the residual technique of agriculture, residues of pesticides in obtained tea concentrate and instant tea powder do not detect, and keep the active ingredient Tea Polyphenols of tea concentrate and instant tea powder to greatest extent, caffeine, tea polysaccharide and theanine etc., fully keep former dark brown fragrance.Tea concentrate and instant tea powder are clarified bright after diluting or dissolving, without residue, capable of direct drinking.This technique can realize suitability for industrialized production, possesses significant economic and social benefit.
For achieving the above object, the present invention adopts following technical scheme:
A kind of tealeaves takes off the residual technique of agriculture: to become to sample tea, semi-finished product tea or tea fresh leaves be for raw material,, low temperature water extraction, membrane filtration, reverse osmosis membrane assorted through raw material are concentrated, resin adsorption, sterilizing, obtain the tea concentrate that de-agriculture is residual, after spraying dry, obtain the instant tea powder that de-agriculture is residual.
Concrete steps are as follows:
1) raw material enters factory and detects that agriculture is residual waits physical and chemical index, carries out sensory review simultaneously, by assorted for the product of separate sources use, and the physical and chemical index of stable prod and organoleptic indicator from source;
2) low temperature water extraction once: material-water ratio 1:10 ~ 25, water temperature 40.0 ~ 70.0 DEG C, extraction time 10.0 ~ 30.0min;
3) membrane filtration: with aperture be the milipore filter of 0.10 ~ 0.50 μm or ceramic membrane for filter medium, pressure differential is 2.0 ~ 4.0kg/cm
2, feed temperature is 5.0 ~ 20.0 DEG C;
4) reverse osmosis membrane concentrates: pressure differential is 15.0 ~ 20.0kg/cm
2, temperature 15.0 ~ 25.0 DEG C, concentrate concentration is 10.0 ~ 15.0Bx;
5) resin adsorption: the model DK110 resin of resin to be the model of Rhom and Hass be AMBER XAD16HP macroporous absorbent resin and Anhui Samsung resin Science and Technology Ltd., post is filled by using wet method after two kinds of mixed with resin and pretreatment, the blade diameter length ratio of adsorption column is 1:5 ~ 8, flow velocity is 1 ~ 4BV/h, the tea concentrate that after post, get Tuo Nong is residual excessively;
6) sterilizing: by tea concentrate through ultra high temperature short time sterilization, temperature 110.0 ~ 140.0 DEG C, time 3 ~ 30s;
7) spraying dry: the temperature importing hot blast is 165 ~ 200 DEG C, controlling leaving air temp is 90 ~ 98 DEG C.
Remarkable advantage of the present invention is:
1) residues of pesticides in tea concentrate and instant tea powder do not detect.
2) the active ingredient Tea Polyphenols of tea concentrate and instant tea powder is kept to greatest extent, caffeine, tea polysaccharide and theanine etc.
3) the former dark brown fragrance of tea concentrate and instant tea powder is fully held.
4) macroporous absorbent resin is used, the water-soluble and fat-soluble residues of pesticides in absorption millet paste.
5), after tea concentrate and instant tea powder dilute or dissolve, clarify bright, without residue, capable of direct drinking.
6) technique can realize suitability for industrialized production, possesses significant economic and social benefit.
Detailed description of the invention
technological process:
1. raw material is checked and accepted: raw material enters factory and detects physical and chemical index such as agriculture residual grade, carries out sensory review simultaneously, according to raw material condition, selects suitable extraction and absorbing process parameter.
2. raw material is assorted: by assorted for the product of separate sources use, the physical and chemical index of stable prod and organoleptic indicator from source, and steady production technique, finally stablizes physical and chemical index and the organoleptic quality of finished product.
3. water at low temperature is extracted: 40.0 ~ 70.0 DEG C of low temperature extract, and material-water ratio 1:10 ~ 25 are extracted once, extraction time 10.0 ~ 30.0min.
4. membrane filtration: membrane filtration with the pressure differential of film both sides for driving force, with milipore filter or ceramic membrane for filter medium, with 2.0 ~ 4.0kg/cm
2pressure differential be driving force, when the feed liquid that temperature is 5.0 ~ 20.0 DEG C flows through film surface, film surface apertures is the micropore of 0.10 ~ 0.50 μm, water and small-molecule substance is only allowed to pass through and become permeate, thus reach clarification millet paste and retain the macromolecular agriculture of part residual, the material that in stoste, volume is greater than film surface micropore footpath is then trapped within the liquid feeding side of film, finally drains.
5. reverse osmosis membrane concentrates: by 15.0 ~ 20.0kg/cm
2pressure as driving force, make water in feed liquid by reverse osmosis membrane separation out, concentration process temperature keeps 15.0 ~ 25.0 DEG C, without phase transformation in whole concentration process, retains the heat-sensitive ingredients in millet paste, thus the quality of maintenance millet paste.Controlling concentrate discharge concentration is 10.0 ~ 15.0Bx.
6. resin treatment: resin employing Rhom and Hass model is the resin of AMBER XAD16HP macroporous absorbent resin and Anhui Samsung resin Science and Technology Ltd. model DK110, two kinds of resins are mixed according to a certain percentage with pretreatment after use wet method to load, adsorption column specification blade diameter length ratio 1:5 ~ 8, according to the residual detection case of tealeaves agriculture, the technological parameter crossing post of adjustment adsorption column, flow velocity is 1 ~ 4BV/h, and the material crossed after post is sloughs the residual concentrate of agriculture.
7. sterile filling: by the concentrate after mistake post through the instantaneous process ultra high temperature short time sterilization of superhigh temperature, sterilizing parameter 110.0 ~ 140.0 DEG C, 3 ~ 30s, then sterile filling, manner of packing is sterile aluminum foil bag, and concentrate can be preserved by normal temperature for a long time.
8. spraying dry: the hot blast importing temperature 165 ~ 200 DEG C at drying tower top, feed liquid is delivered to top of tower simultaneously, the very large misty liquid droplets of specific area is sprayed into by atomizer (centrifugal type atomizer or pressure atomizer), after contacting with high-temperature hot-air, moisture evaporates rapidly, just dry products is become within the extremely short time, for ensureing product quality, need control leaving air temp is 90 ~ 98 DEG C.
Embodiment 1
A kind of tealeaves takes off the residual technique of agriculture: to become to sample tea, semi-finished product tea or tea fresh leaves be for raw material,, low temperature water extraction, membrane filtration, reverse osmosis membrane assorted through raw material are concentrated, resin adsorption, sterilizing, obtain the tea concentrate that de-agriculture is residual, after spraying dry, obtain the instant tea powder that de-agriculture is residual.
Concrete steps are as follows:
1) raw material enters factory and detects that agriculture is residual waits physical and chemical index, carries out sensory review simultaneously, by assorted for the product of separate sources use, and the physical and chemical index of stable prod and organoleptic indicator from source;
2) low temperature water extraction once: material-water ratio 1:10, water temperature 40.0 DEG C, extraction time 10.0min;
3) membrane filtration: with aperture be the milipore filter of 0.10 μm or ceramic membrane for filter medium, pressure differential is 2.0kg/cm
2, feed temperature is 5.0 DEG C;
4) reverse osmosis membrane concentrates: pressure differential is 15.0kg/cm
2, temperature 15.0 DEG C, concentrate concentration is 10.0Bx;
5) resin adsorption: the model DK110 resin of resin to be the model of Rhom and Hass be AMBER XAD16HP macroporous absorbent resin and Anhui Samsung resin Science and Technology Ltd., post is filled by using wet method after two kinds of mixed with resin and pretreatment, the blade diameter length ratio of adsorption column is 1:5, flow velocity is 1BV/h, the tea concentrate that after post, get Tuo Nong is residual excessively;
6) sterilizing: by tea concentrate through ultra high temperature short time sterilization, temperature 110.0 DEG C, time 3s;
7) spraying dry: the temperature importing hot blast is 165 DEG C, controlling leaving air temp is 90 DEG C.
Embodiment 2
A kind of tealeaves takes off the residual technique of agriculture: to become to sample tea, semi-finished product tea or tea fresh leaves be for raw material,, low temperature water extraction, membrane filtration, reverse osmosis membrane assorted through raw material are concentrated, resin adsorption, sterilizing, obtain the tea concentrate that de-agriculture is residual, after spraying dry, obtain the instant tea powder that de-agriculture is residual.
Concrete steps are as follows:
1) raw material enters factory and detects that agriculture is residual waits physical and chemical index, carries out sensory review simultaneously, by assorted for the product of separate sources use, and the physical and chemical index of stable prod and organoleptic indicator from source;
2) low temperature water extraction once: material-water ratio 1:25, water temperature 70.0 DEG C, extraction time 30.0min;
3) membrane filtration: with aperture be the milipore filter of 0.50 μm or ceramic membrane for filter medium, pressure differential is 4.0kg/cm
2, feed temperature is 20.0 DEG C;
4) reverse osmosis membrane concentrates: pressure differential is 20.0kg/cm
2, temperature 25.0 DEG C, concentrate concentration is 15.0Bx;
5) resin adsorption: the model DK110 resin of resin to be the model of Rhom and Hass be AMBER XAD16HP macroporous absorbent resin and Anhui Samsung resin Science and Technology Ltd., post is filled by using wet method after two kinds of mixed with resin and pretreatment, the blade diameter length ratio of adsorption column is 1:8, flow velocity is 4BV/h, the tea concentrate that after post, get Tuo Nong is residual excessively;
6) sterilizing: by tea concentrate through ultra high temperature short time sterilization, temperature 140.0 DEG C, time 30s;
7) spraying dry: the temperature importing hot blast is 200 DEG C, controlling leaving air temp is 98 DEG C.
Embodiment 3
A kind of tealeaves takes off the residual technique of agriculture: to become to sample tea, semi-finished product tea or tea fresh leaves be for raw material,, low temperature water extraction, membrane filtration, reverse osmosis membrane assorted through raw material are concentrated, resin adsorption, sterilizing, obtain the tea concentrate that de-agriculture is residual, after spraying dry, obtain the instant tea powder that de-agriculture is residual.
Concrete steps are as follows:
1) raw material enters factory and detects that agriculture is residual waits physical and chemical index, carries out sensory review simultaneously, by assorted for the product of separate sources use, and the physical and chemical index of stable prod and organoleptic indicator from source;
2) low temperature water extraction once: material-water ratio 1:20, water temperature 55.0 DEG C, extraction time 20.0min;
3) membrane filtration: with aperture be the milipore filter of 0.30 μm or ceramic membrane for filter medium, pressure differential is 3.0kg/cm
2, feed temperature is 10.0 DEG C;
4) reverse osmosis membrane concentrates: pressure differential is 18.0kg/cm
2, temperature 20.0 DEG C, concentrate concentration is 12.0Bx;
5) resin adsorption: the model DK110 resin of resin to be the model of Rhom and Hass be AMBER XAD16HP macroporous absorbent resin and Anhui Samsung resin Science and Technology Ltd., post is filled by using wet method after two kinds of mixed with resin and pretreatment, the blade diameter length ratio of adsorption column is 1:6, flow velocity is 2BV/h, the tea concentrate that after post, get Tuo Nong is residual excessively;
6) sterilizing: by tea concentrate through ultra high temperature short time sterilization, temperature 125.0 DEG C, time 15s;
7) spraying dry: the temperature importing hot blast is 180 DEG C, controlling leaving air temp is 94 DEG C.
Product checking
GB2763-2014 viewpoint of Chinese food safety national standard Pesticide MRL
Conclusion: in the product after this PROCESS FOR TREATMENT, all agricultures are residual does not all detect, the superiority of visible present invention process, and can be applicable to suitability for industrialized production, possesses significant economic and social benefit.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (2)
1. a tealeaves takes off the residual technique of agriculture, it is characterized in that: to become to sample tea, semi-finished product tea or tea fresh leaves be for raw material,, low temperature water extraction, membrane filtration, reverse osmosis membrane assorted through raw material are concentrated, resin adsorption, sterilizing, obtain the tea concentrate that de-agriculture is residual, after spraying dry, obtain the instant tea powder that de-agriculture is residual.
2. tealeaves according to claim 1 takes off the residual technique of agriculture, it is characterized in that: concrete steps are as follows:
Raw material enters factory and detects that agriculture is residual waits physical and chemical index, carries out sensory review simultaneously, by assorted for the product of separate sources use, and the physical and chemical index of stable prod and organoleptic indicator from source;
Low temperature water extraction is once: material-water ratio 1:10 ~ 25, water temperature 40.0 ~ 70.0 DEG C, extraction time 10.0 ~ 30.0min;
Membrane filtration: with aperture be the milipore filter of 0.10 ~ 0.50 μm or ceramic membrane for filter medium, pressure differential is 2.0 ~ 4.0kg/cm
2, feed temperature is 5.0 ~ 20.0 DEG C;
Reverse osmosis membrane concentrates: pressure differential is 15.0 ~ 20.0kg/cm
2, temperature 15.0 ~ 25.0 DEG C, concentrate concentration is 10.0 ~ 15.0Bx;
Resin adsorption: the model DK110 resin of resin to be the model of Rhom and Hass be AMBER XAD16HP macroporous absorbent resin and Anhui Samsung resin Science and Technology Ltd., post is filled by using wet method after two kinds of mixed with resin and pretreatment, the blade diameter length ratio of adsorption column is 1:5 ~ 8, flow velocity is 1 ~ 4BV/h, the tea concentrate that after post, get Tuo Nong is residual excessively;
Sterilizing: by tea concentrate through ultra high temperature short time sterilization, temperature 110.0 ~ 140.0 DEG C, time 3 ~ 30s;
Spraying dry: the temperature importing hot blast is 165 ~ 200 DEG C, controlling leaving air temp is 90 ~ 98 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202340.7A CN104839378A (en) | 2015-04-27 | 2015-04-27 | Tea pesticide residue removing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202340.7A CN104839378A (en) | 2015-04-27 | 2015-04-27 | Tea pesticide residue removing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104839378A true CN104839378A (en) | 2015-08-19 |
Family
ID=53839678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510202340.7A Pending CN104839378A (en) | 2015-04-27 | 2015-04-27 | Tea pesticide residue removing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104839378A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105266170A (en) * | 2015-11-04 | 2016-01-27 | 无锡职业技术学院 | Automatic vegetable washing machine with pesticide absorption function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101849595A (en) * | 2010-02-03 | 2010-10-06 | 福建农林大学 | Method for reducing pesticide residue in instant tea by resin adsorption method |
| CN101880245A (en) * | 2010-04-27 | 2010-11-10 | 南京泽朗农业发展有限公司 | Method for purifying citrulline from watermelon |
| CN102001766A (en) * | 2010-10-29 | 2011-04-06 | 湖州欣格膜科技有限公司 | Defluorinating method of photovoltaic wastewater |
| CN103549070A (en) * | 2013-11-04 | 2014-02-05 | 无锡太阳绿宝科技有限公司 | Preparation method for instant tea powder without pesticide residues |
| CN103859084A (en) * | 2014-04-02 | 2014-06-18 | 湖南农业大学 | Low-fluorine Fuzhuan tea and making process thereof |
-
2015
- 2015-04-27 CN CN201510202340.7A patent/CN104839378A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101849595A (en) * | 2010-02-03 | 2010-10-06 | 福建农林大学 | Method for reducing pesticide residue in instant tea by resin adsorption method |
| CN101880245A (en) * | 2010-04-27 | 2010-11-10 | 南京泽朗农业发展有限公司 | Method for purifying citrulline from watermelon |
| CN102001766A (en) * | 2010-10-29 | 2011-04-06 | 湖州欣格膜科技有限公司 | Defluorinating method of photovoltaic wastewater |
| CN103549070A (en) * | 2013-11-04 | 2014-02-05 | 无锡太阳绿宝科技有限公司 | Preparation method for instant tea powder without pesticide residues |
| CN103859084A (en) * | 2014-04-02 | 2014-06-18 | 湖南农业大学 | Low-fluorine Fuzhuan tea and making process thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105266170A (en) * | 2015-11-04 | 2016-01-27 | 无锡职业技术学院 | Automatic vegetable washing machine with pesticide absorption function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105053174B (en) | A kind of Preparation method and use of plant source composite preservative | |
| TWI542396B (en) | The use of ultrafine bubble extraction method and its extract | |
| CN104082352A (en) | Biological pesticide | |
| TW201511695A (en) | A tobacco material and a method of making the same | |
| CN105309496A (en) | Chinese herbal medicine disinfectant | |
| Isailović et al. | Microencapsulation of natural antioxidants from Pterospartum tridentatum in different alginate and inulin systems | |
| CN103815103B (en) | A kind of method extracting low-caffeine high content tea polyphenol from fresh tea leaf in its | |
| Torun et al. | Concentration of sage (Salvia fruticosa Miller) extract by using integrated membrane process | |
| CN106490076A (en) | A kind of Farm chemical of Chinese berbs of preventing and treating grain storage pest and preparation method thereof | |
| CN105707221A (en) | Fruit and vegetable preservative paper | |
| CN104839378A (en) | Tea pesticide residue removing process | |
| CN104839411B (en) | A kind of method of caffeine in reduction instant tea | |
| CN103951736B (en) | A kind of bacillus amyloliquefaciens NCPSJ7 antibacterial protein product and preparation method thereof | |
| Vincze et al. | Concentration of sea buckthorn (Hippophae rhamnoides L.) juice with membrane separation | |
| Kalušević et al. | Microencapsulation of herbal extract by spray drying. | |
| CN103815587B (en) | A kind ofly harmful fine particulates is effectively stoped in air to suck and mouth mask with bacteriostasis and preparation method thereof | |
| CN106398873B (en) | preparation method of tea tree flower essential oil | |
| CN106433975B (en) | A method of utilizing the low As content tree moss absolute of molecular clock | |
| CN105123789B (en) | A kind of free anthraquinones extracted from rheum nano-emulsion preparation for being used to prevent and treat plant red spider disease | |
| Nogueira et al. | Aqueous extract of pomegranate peels (Punica granatum) encapsulated by spray drying. | |
| CN105478796B (en) | A kind of Nano silver solution for the method and its preparation that Nano Silver is prepared using tea tree ethereal oil | |
| KR20150106581A (en) | Method for removing chlorophyll from natural extract | |
| CN109329409A (en) | A kind of fruit antistaling agent | |
| Huynh et al. | Spray drying conditions of lime juice prepared by freeze-concentration | |
| CN107522721A (en) | A kind of technique of efficiently purification nimbin raw medicine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150819 |