CN104962761A - Method for resource utilization of watermelon peel - Google Patents
Method for resource utilization of watermelon peel Download PDFInfo
- Publication number
- CN104962761A CN104962761A CN201510410103.XA CN201510410103A CN104962761A CN 104962761 A CN104962761 A CN 104962761A CN 201510410103 A CN201510410103 A CN 201510410103A CN 104962761 A CN104962761 A CN 104962761A
- Authority
- CN
- China
- Prior art keywords
- manganese
- semi
- watermelon
- oxide ore
- watermelon rind
- 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
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a new method for resource utilization of watermelon peels. The method comprises the following basic steps: (1) crushing naturally air-dried or heat-dried watermelon peels for use as reducing agent; (2) adding a certain amount of semi-oxidized manganese ore or electrolytic manganese anode slime into a reactor with an agitator, adding watermelon peels with a mass which is 0.06 to 0.20 time of the mass of semi-oxidized manganese ore or electrolytic manganese anode slime and concentrated sulfuric acid with concentration of 98 percent with a mass which is 0.8 to 1.5 time of the mass of semi-oxidized manganese ore or electrolytic manganese anode slime, and using water to regulate pulp liquid-to-solid ratio to 3:1 to 5:1; (3) leaching semi-oxidized manganese ore or electrolytic manganese anode slime at temperature of 70 to 98 DEG C and performing reaction for 2 to 6 hours under an agitating condition to obtain manganese sulfate solution, wherein the leaching rate of manganese reaches more than 90 percent. The new method for resource utilization of watermelon peels has the advantages that the waste watermelon peels are used as reducing agent, the wastes are turned into valuable things and the method has environmental and economic dual benefits; the leaching process conditions are mild, the operation is simple and convenient to perform and the amount of impurities brought into leachate is small.
Description
Technical field:
The present invention relates to a kind of method of recycling Watermelon rind, be particularly suitable in sulfuric acid medium, make with Watermelon rind the method that reductive agent leaches semi-manganese oxide ore or electrolytic manganese anode mud.
Background technology:
Watermelon rind is generally abandons skin, China growth of watermelon area 108hm when people eat watermelon
2annual production reaches more than 5,000 ten thousand tons, and Watermelon rind accounts for 1/3rd of watermelon total amount, along with the increase of the watermelon amount of eating raw and amount of finish, a large amount of Watermelon rind is directly abandoned as waste, adds the burden of environmental sanitation department, especially the time in full summer, process not in time, can go bad, smelly, become the breeding ground of mosquito, contaminate environment.The general water content of Watermelon rind reaches more than 95%, and be about 12.76g/Kg containing total glucides, protein is about 3.38g/Kg, titratable acid is about 1.21g/Kg, pectin about 2%, and the multiple nutritional components such as abundant Vc, Zn, Mo, Mn, Mg, EXOCARPIUM CITRULLI juice, pickled melon skin, preserved fruit, fruit vinegar, feed and fertilizers for potted flowers etc. can be made.And there is certain medical value, and can according to the nature and function of Watermelon rind, reasonable development Watermelon rind product.
Semi-manganese oxide ore is rhodochrosite (MnCO
3) be partly oxidized to Manganse Dioxide (MnO
2) mineral, be present in a large number in the transition layer of manganese oxide ore and rhodochrosite.MnCO in ore
3available sulfuric acid directly leaches, but MnO
2be insoluble to sulfuric acid, need deposit in case, by redox reaction MnO at reductive agent
2be reduced into Mn
2+and leached, Mn
2+combine with sulfuric acid and generate manganous sulfate.
Electrolytic manganese anode mud refers to high-purity sulfuric acid manganese solution in a cell in electrolysis production manganese metal process, is inevitably formed in anolyte compartment with MnO
2or the hydrous oxide of manganese is precipitated as main material, and black easily lumps, and wherein Fe content is up to 40% ~ 50%, but due to its main component be MnO
2, conventional acidleach also cannot leach manganese wherein, needs, when adding reductive agent, could generate manganous sulfate.
Manganous sulfate is that all kinds of manganese product of preparation is as the main raw material of electrolytic metal Mn, electrolytic manganese dioxide, manganous carbonate, trimanganese tetroxide etc.Because Watermelon rind procurement cost is low, simultaneously as a kind of biomass material, if the manganese in wherein effective constituent reducing leaching semi-manganese oxide ore or electrolytic manganese anode mud can be utilized, turn waste into wealth, realize the recycling of Watermelon rind, increase economic benefit, meet recycling economy development theory.
In order to obtain a kind of method recycling Watermelon rind preferably, people have found out a lot of way, and we retrieved the document of some open reports, take passages as follows:
1. [Application Number (patent)] CNl03382230A[title] from the method for extracting pectin from watermelon peel [application (patent right) people] Jiangsu Hilly Ground Zhenjiang Agriculture Science Research Institute.The fresh cleaning of the Watermelon rind without corruption blends and dewaters by the method, add the water of 2 ~ 4 times again, acid adding adjustment pH to 2.0 ~ 3.0, be placed in ball grinder wet pulverization 0.5 ~ lh, centrifugal 15min under 8000rpm, adopts charcoal decolouring, concentrating under reduced pressure, alcohol system is processed, and 70 DEG C of oven dry are sieved obtained pectin product.
2. [Application Number (patent)] CNl03706629A[title] a kind of method [application (patent right) people] Sichuan Agricultural University utilizing Watermelon rind drip washing to remove Cadium In Polluted Soil.Watermelon rind is cleaned by the method, the post-drying that completes in baking oven is to weight, with pulverizer abrasive dust to crossing l mm sieve, then filter after 9 hours with the KCl solution lixiviate that concentration is 0.5%, obtained Watermelon rind leacheate, adds to this leacheate in the cadmium pollution soil of farmland, then its pH is regulated to be 4.0 ± 0.1 with sodium hydroxide solution and dilute hydrochloric acid, vibration drip washing, last centrifugation, cadmium drip washing clearance reaches more than 50%.
3. [Application Number (patent)] CN103382465A[title] method [application (patent right) people] Jiangsu Hilly Ground Zhenjiang Agriculture Science Research Institute of the L-Glutamic decarboxylase that extracts from Watermelon rind and extracting method and production γ-aminobutyric acid.The method is squeezed the juice fresh without rotten Watermelon rind is clean, residue is gone to add the citric acid solution of 1 ~ 3 times of pH 5.2 ~ pH 5.8, lixiviate 0.5 ~ 1 hour, multiple squeezing, mixes twice juice, adds cross-linked polyvinylpyrrolidone 0.05 ~ 0.12%, after mixing, leave standstill 30min, centrifugal 10 ~ 15min under 7000 ~ 1000rpm condition, obtain GAD enzyme liquid.
4. comprehensive utilization [author] Zhang Yanmin of [autograph] Watermelon rind, Korean phoenix, Qiu sprinkles the nutritive ingredient and medical value that wait [mechanism] Luohe Department of Food Engineering of food Professional School [periodical name] complete processing [digest] paper Watermelon rind, and the processing work techniques such as EXOCARPIUM CITRULLI juice, Watermelon rind pectin, pickled melon skin, watermelon peel jam, Watermelon rind preserved fruit, watermelon sugar sweet bar, Watermelon rind fruit vinegar and key points for operation are set forth, to reasonably developing Watermelon rind resource.
From above-mentioned literature search result, owing to containing the various materials such as abundant carbohydrate (glucose, fructose), pectin and Mierocrystalline cellulose in Watermelon rind, have broad application prospects.
Summary of the invention:
The object of this invention is to provide a kind of method of recycling Watermelon rind, it is characterized in that utilizing Watermelon rind for reductive agent, in sulfuric acid medium, leach the method for semi-manganese oxide ore or electrolytic manganese anode mud acquisition manganese sulfate solution.
Above-mentioned said Watermelon rind is the pericarp of watermelon, causes water content lower than the product of 10%, pulverized 60 mesh sieves with for subsequent use through natural air drying or heat drying.
Above-mentioned said semi-manganese oxide ore is rhodochrosite (MnCO
3) be partly oxidized to Manganse Dioxide (MnO
2) mineral, total Fe content is greater than 12%, wherein MnO
2content be greater than 8%.
Above-mentioned said electrolytic manganese anode mud refers to manganese sulfate solution in a cell in electrolysis production manganese metal process, is inevitably formed in anolyte compartment with MnO
2or the hydrous oxide of manganese is precipitated as main material, and wherein Fe content is up to 40% ~ 50%, MnO
2content be greater than 60%.
The present invention is achieved in that (1) by Watermelon rind natural air drying or heat drying to water content lower than after 10%, was crushed to 60 mesh sieves, and semi-manganese oxide ore or electrolytic manganese anode mud were crushed to 100 mesh sieves; (2) Watermelon rind adding semi-manganese oxide ore or electrolytic manganese anode mud quality 0.06 ~ 0.20 times in the reactor makes reductive agent, and add semi-manganese oxide ore or electrolytic manganese anode mud, then adding semi-manganese oxide ore or electrolytic manganese anode mud quality 0.8 ~ 1.5 times of concentration is the vitriol oil of 98%, is 3: 1 ~ 5: 1 by water modulation ore pulp liquid-solid ratio; (3) at 70 ~ 98 DEG C of temperature, leach semi-manganese oxide ore or electrolytic manganese anode mud, stirring reaction 2 ~ 6h obtains manganese sulfate solution, and manganese leaching yield reaches more than 90%; (4) by impurity such as the heavy metal ion in known chemical subtraction method removing solution and calcium, magnesium, silicon, the manganese sulfate solution obtaining refining is filtered.
The substantive distinguishing features that the present invention gives prominence to and significant progress are:
(1) Watermelon rind is as solid waste, simultaneously as a kind of biomass, belongs to renewable raw materials, directly utilizes its effective constituent as reductive agent, in acid condition by the MnO in semi-manganese oxide ore or electrolytic manganese anode mud
2reducing leaching, greatly reduces the leaching cost of semi-manganese oxide ore or electrolytic manganese anode mud, and compared with existing reductive agent, leaching cost can reduce by more than 10%.
(2) compared with the technology of current recycling Watermelon rind, technological process is simple, and flow process is short, and speed of response is fast, and utilize the waste residue produced in process few, Watermelon rind utilization ratio is high.
Therefore, utilizing the reducing substances reducing leaching semi-manganese oxide ore in Watermelon rind or electrolytic manganese anode mud, is a kind of good method of Watermelon rind recycling.
Embodiment:
Embodiment 1
Semi-manganese oxide ore was crushed to 100 mesh sieves (forming as shown in table 1), Watermelon rind through natural wind in after, be crushed to 60 mesh sieves (forming as shown in table 3), add the Watermelon rind of semi-manganese oxide ore quality 0.06 times in the reactor, and add semi-manganese oxide ore, then adding semi-manganese oxide ore quality 1.5 times of concentration is the sulfuric acid of 98%, modulating ore pulp to liquid-solid ratio with water is 4, at 98 DEG C of temperature, stirring reaction 4h obtains reacting leach liquor, and in semi-manganese oxide ore, the leaching yield of Mn reaches 96.52%.
The composition analysis of table 1 semi-manganese oxide ore
The composition analysis of table 2 electrolytic manganese anode mud
Table 3 Watermelon rind composition analysis (butt) wt%
Embodiment 2
Semi-manganese oxide ore was crushed to 100 mesh sieves (forming as shown in table 1), Watermelon rind is after natural air drying, be crushed to 60 mesh sieves (forming as shown in table 3), add the Watermelon rind of semi-manganese oxide ore quality 0.10 times in the reactor, and add semi-manganese oxide ore, then adding semi-manganese oxide ore quality 0.8 times of concentration is the sulfuric acid of 98%, modulating ore pulp to liquid-solid ratio with water is 3, at 70 DEG C of temperature, stirring reaction 6h obtains reacting leach liquor, and in semi-manganese oxide ore, the leaching yield of Mn reaches 90.67%.
Embodiment 3
Semi-manganese oxide ore was crushed to 100 mesh sieves (forming as shown in table 1), Watermelon rind is after natural air drying, be crushed to 60 mesh sieves (forming as shown in table 3), add the Watermelon rind of semi-manganese oxide ore quality 0.20 times in the reactor, and add semi-manganese oxide ore, then adding semi-manganese oxide ore quality 1.2 times of concentration is the sulfuric acid of 98%, modulating ore pulp to liquid-solid ratio with water is 3, at 90 DEG C of temperature, stirring reaction 2h obtains reacting leach liquor, and in semi-manganese oxide ore, the leaching yield of Mn reaches 91.84%.
Embodiment 4
Electrolytic manganese anode mud was crushed to 100 mesh sieves (forming as shown in table 2), Watermelon rind is after natural air drying, be crushed to 60 mesh sieves (forming as shown in table 3), add the Watermelon rind of electrolytic manganese anode mud quality 0.20 times in the reactor, and add electrolytic manganese anode mud, then adding electrolytic manganese anode mud quality 1.5 times of concentration is the sulfuric acid of 98%, modulating ore pulp to liquid-solid ratio with water is 5, at 90 DEG C of temperature, stirring reaction 5h obtains reacting leach liquor, and in electrolytic manganese anode mud, the leaching yield of Mn reaches 98.48%.
Claims (2)
1. the method for a recycling Watermelon rind, it is characterized in that making reductive agent with the Watermelon rind of semi-manganese oxide ore or electrolytic manganese anode mud quality 0.06 ~ 0.20 times, be the vitriol oil of 98% by semi-manganese oxide ore or electrolytic manganese anode mud quality 0.8 ~ 1.5 times of concentration, modulating ore pulp liquid-solid ratio with water is 3: 1 ~ 5: 1, semi-manganese oxide ore or electrolytic manganese anode mud is leached at 70 ~ 98 DEG C of temperature, stirring reaction 2 ~ 6h obtains manganese sulfate solution, and manganese leaching yield reaches more than 90%.
2. method according to claim 1, it is characterized in that Watermelon rind be through natural air drying or heat drying to water content lower than 10%, be crushed to the product of 60 mesh sieves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510410103.XA CN104962761A (en) | 2015-07-14 | 2015-07-14 | Method for resource utilization of watermelon peel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510410103.XA CN104962761A (en) | 2015-07-14 | 2015-07-14 | Method for resource utilization of watermelon peel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104962761A true CN104962761A (en) | 2015-10-07 |
Family
ID=54216845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510410103.XA Pending CN104962761A (en) | 2015-07-14 | 2015-07-14 | Method for resource utilization of watermelon peel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104962761A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539239A (en) * | 2018-04-04 | 2018-09-14 | 广州大学 | A kind of watermelon peel catalyst, the preparation method and microbiological fuel cell of Catalytic Layer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884099A (en) * | 2006-07-07 | 2006-12-27 | 广西大学 | Method for preparing manganese sulfate by reduction leaching of manganese ore using discard molasses and sulfuric acid |
| CN101886168A (en) * | 2010-07-14 | 2010-11-17 | 广西大学 | Extract technology of semi-manganese oxide ore |
| CN102531142A (en) * | 2012-01-13 | 2012-07-04 | 河南科技大学 | Method for treating chromium-containing waste water by utilizing banana skin |
| CN103706629A (en) * | 2013-12-20 | 2014-04-09 | 四川农业大学 | Method for removing cadmium in contaminated soil through watermelon peel leaching |
| CN103991910A (en) * | 2014-05-22 | 2014-08-20 | 桂林电子科技大学 | Method for preparing nano trimanganese tetroxide |
-
2015
- 2015-07-14 CN CN201510410103.XA patent/CN104962761A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884099A (en) * | 2006-07-07 | 2006-12-27 | 广西大学 | Method for preparing manganese sulfate by reduction leaching of manganese ore using discard molasses and sulfuric acid |
| CN101886168A (en) * | 2010-07-14 | 2010-11-17 | 广西大学 | Extract technology of semi-manganese oxide ore |
| CN102531142A (en) * | 2012-01-13 | 2012-07-04 | 河南科技大学 | Method for treating chromium-containing waste water by utilizing banana skin |
| CN103706629A (en) * | 2013-12-20 | 2014-04-09 | 四川农业大学 | Method for removing cadmium in contaminated soil through watermelon peel leaching |
| CN103991910A (en) * | 2014-05-22 | 2014-08-20 | 桂林电子科技大学 | Method for preparing nano trimanganese tetroxide |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539239A (en) * | 2018-04-04 | 2018-09-14 | 广州大学 | A kind of watermelon peel catalyst, the preparation method and microbiological fuel cell of Catalytic Layer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE10327954B4 (en) | Improved processes for the production of ethanol and methane from cereals | |
| CN103910569B (en) | One planting fruit-trees special bio fertilizer and preparation method thereof | |
| CN102174121B (en) | Process for extracting pectin from citrus peel | |
| CN104957448B (en) | A kind of method of cadmium in molten combination fermentation removing rice of acid | |
| CN103525870A (en) | Microbial flocculant as well as preparation method and application thereof | |
| CN100515945C (en) | Low sodium salt of botanic origin | |
| CN101229984A (en) | Biological potassic fertilizer produced by using low-grade potassium-bearing rocks and production method thereof | |
| CN104355806B (en) | Folium Agaves Sisalanae waste residue produces the method for Caulis Sacchari sinensis compound fertilizer | |
| CN105967436A (en) | Method for biodegradation of organic phosphorus pesticide wastewater | |
| CN103238819A (en) | Plant salt and preparation method of plant salt | |
| CN106245397A (en) | A kind of method that Cotton Stalk high value is comprehensively refined | |
| CN101589760B (en) | Industrial hempseeds isolated protein powder and preparation method thereof | |
| CN106616005A (en) | Method for producing fish feed by using filtered sludge from sugar factory | |
| CN101258922B (en) | Comprehensive utilization aloe skin processing method | |
| CN102524740B (en) | Nitraria plant salt and preparation method thereof | |
| CN104789227B (en) | A kind of soil heavy metal passivant being applied under waterflooding environment and its application | |
| CN105996039A (en) | Comprehensive utilization method of fructus momordicae | |
| CN104962761A (en) | Method for resource utilization of watermelon peel | |
| CN107867929A (en) | Bio-organic fertilizer special suitable for salt-soda soil and preparation method thereof | |
| CN110584071A (en) | Method for extracting suaeda salsa plant salt | |
| CN107216199A (en) | A kind of preparation method of granular soil conditioner | |
| CN215440255U (en) | System for large-scale tail dish production environmental protection ferment and feedstuff | |
| CN105418301A (en) | Organic compound fertilizer and preparation method thereof | |
| CN104355805B (en) | Folium Agaves Sisalanae waste residue produces the method for Oryza sativa L. fertilizer | |
| CN102826874A (en) | Method for producing potash magnesium sulphate fertilizers with unsaturation brine serving as flotation medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151007 |