CN113185342A - Method and device for producing efficient organic liquid fertilizer by using waste vegetables - Google Patents
Method and device for producing efficient organic liquid fertilizer by using waste vegetables Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C11/00—Other nitrogenous fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/964—Constructional parts, e.g. floors, covers or doors
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/964—Constructional parts, e.g. floors, covers or doors
- C05F17/971—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material
- C05F17/986—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material the other material being liquid
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biotechnology (AREA)
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a method and a device for producing a high-efficiency organic liquid fertilizer by using waste vegetables, wherein the method comprises the following steps: s1, collecting the waste vegetables, pretreating, crushing and homogenizing to obtain a waste vegetable homogenate liquid; s2 enzymolysis: adding a complex enzyme dispersant into the tailed vegetable homogenate obtained in the step S1 for enzymolysis; s3, solid-liquid separation: separating insoluble substances in the tailed vegetable enzymolysis liquid in the step S2 to obtain a tailed vegetable enzymolysis stock solution without solid impurities; s4 production of liquid fertilizer: the waste vegetable enzymolysis stock solution is used as a raw material for producing the liquid fertilizer, and is freely mixed with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution and a medium-trace element mother solution according to different set formulas to obtain the waste vegetable formula liquid fertilizer with comprehensive nutrients suitable for different crops. The invention also provides a device for the method for producing the high-efficiency organic liquid fertilizer by using the waste vegetables. The invention has simple production process and low construction cost, and the produced liquid fertilizer has high content of nutrient components, comprehensive nutrients, flexible and reasonable formula and high degree of automation.
Description
Technical Field
The invention relates to the field of agricultural waste resource utilization, in particular to a method and a device for producing an efficient organic liquid fertilizer by using waste vegetables.
Background
As a traditional industry in China, vegetable planting plays an important role in rural economy and is one of important ways for increasing income and leading to wealth of farmers. The vegetable basket of citizens is enriched by large-area vegetable planting, the living requirements of people are met, and a large amount of tail vegetables, namely vegetable wastes, are generated along with the vegetable basket. The tail vegetables refer to roots, stems, leaves, rotten fruits and the like which are discarded in the process of harvesting and processing vegetable products and have no commodity value. According to the measurement and calculation: the annual production waste (stems, rotten fruits and the like) of the vegetable greenhouse per mu is about 3 tons, and the quantity is huge. In the centralized vegetable scale production area in China, since the crops for rotation are many, the production of the tailed vegetables is carried out all the year round. Meanwhile, since the production period of the tail vegetables is concentrated, a large amount of the tail vegetables are generally accumulated beside highways, country roads, fields, ditches, farmlands and the like. Due to high water content, the tail vegetables are not easy to be incinerated; meanwhile, since the content of organic components in the tailstocks is high, a large amount of percolate can be generated during stacking or landfill, and the soil and surface water in a stacking area are easily polluted. Especially in the high temperature period in summer, the coating is easy to rot, and causes the transmission of harmful pathogenic bacteria. The pollution and the disease are particularly prominent in the main vegetable production area, and the healthy development of the vegetable industry and the improvement of rural environment are seriously influenced. More and more attention has been paid to the rational utilization of vegetable wastes to reduce environmental pollution and improve the utilization rate of agricultural wastes as resources.
At present, the treatment modes of the tail vegetables mainly comprise compost (Liutao, Hedong orchid, Lixianhua, Cheng national military, left bang violence, left Wei), a method for preparing an organic fertilizer by utilizing the vegetable tail vegetables [ P ]. Hubei province: CN107445657B, 2020-09-11.), anaerobic fermentation (Broussonetia, Zhang Heyun, a tail vegetable ecological cycle treatment and utilization process [ P ]. Gansu province: CN111549078A, 2020-08-18.), anaerobic and aerobic fermentation combination and the like. The water content of the tail vegetables is generally about 90%, if the tail vegetables are treated in a composting mode, the water content of the tail vegetables needs to be reduced firstly, fluffy substances are added to increase the porosity, in addition, the composting period is generally longer, and the continuous pile turning needs to be carried out manually, so that the enthusiasm of vegetable growers for applying the tail vegetables to the composting is low. The second utilization mode of anaerobic fermentation can produce biogas as an energy source, but the process of anaerobic fermentation extremely depends on the performance of a high-efficiency reactor and is greatly limited by facilities and processes, and in addition, the final product of anaerobic fermentation can also generate a new pollution source of waste water and waste residues. The mode of combining anaerobic fermentation and aerobic fermentation needs to establish two sets of aerobic and anaerobic systems at the same time, so that the equipment investment and the operation cost are higher. In a comprehensive view, both composting and anaerobic fermentation require certain facility construction cost, the technical requirement is high, and the large-scale popularization and application are difficult to carry out in practical application.
Compared with solid fertilizers, the liquid fertilizer has the advantages of good water solubility, rapid absorption and uniform nutrient content, and the labor cost for applying the liquid fertilizer is relatively low. The tailed vegetable has high water content, rich nutrients and no toxicity except part of the tissues with diseases and pests. The waste caused in the drying process of other purposes can be avoided by producing the liquid fertilizer from the waste vegetable resources, adverse factors such as easy mildew and deterioration are avoided, and the resource utilization rate is greatly improved. Chinese patent CN109608242A discloses a method for producing fertilizer from Chinese cabbage tails, and Chinese patent CN111549078A discloses an ecological cycle treatment and utilization process for the Chinese cabbage tails, wherein in the prior art, after the Chinese cabbage is subjected to crushing pretreatment, the juice of the Chinese cabbage and the residue of the Chinese cabbage need to be separated by solid-liquid separation, then the residue of the Chinese cabbage needs to be subjected to solid fermentation to prepare organic fertilizer, and the juice of the Chinese cabbage needs to be fermented to prepare liquid fertilizer; since the solid-liquid separation is carried out on the crushed Chinese cabbage, the prepared liquid fertilizer does not contain nutrient elements in the Chinese cabbage residue, and the Chinese cabbage is not completely utilized; meanwhile, the separated Chinese cabbage juice needs to be added with other raw materials and then fermented by the liquid fertilizer, and the operation is complicated.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings of the prior art and provide a method for treating tail vegetables by utilizing the tail vegetables to produce high-efficiency liquid fertilizer. The method has the advantages that the uniform slurry of the tailed vegetables is obtained and then is subjected to direct enzymolysis, and solid-liquid separation is carried out after the enzymolysis is finished, compared with the prior art, the tailed vegetables are more thoroughly utilized, nutrient substances released after the enzymolysis are more sufficient, the nutrient substances of the liquid fertilizer are more comprehensive, meanwhile, a small amount of solid after the enzymolysis can be used for composting, the enzymolysis liquid of the tailed vegetables with a large proportion can be directly used for producing the liquid fertilizer, the loss of the nutrients can not be caused, the production can be completely automated, and the nutrient value and the marketability of the fertilizer are higher; the method has the advantages of easy operation, simple technology, high automation degree, and capability of producing liquid fertilizer with lower cost and realizing the resource utilization of the waste vegetables.
The first purpose of the invention is to provide a method for producing high-efficiency liquid fertilizer by using the waste vegetables.
The second purpose of the invention is to provide a device for the method for producing the high-efficiency organic liquid fertilizer by using the waste vegetables.
The above object of the present invention is achieved by the following technical solutions:
a method for producing a high-efficiency liquid fertilizer by using waste vegetables comprises the following steps:
s1, raw material pretreatment: collecting the waste vegetables, pretreating, crushing and homogenizing to obtain waste vegetable homogenate liquid;
s2, enzymolysis: adding a complex enzyme dispersant into the tailed vegetable homogenate obtained in the step S1 for enzymolysis;
s3, solid-liquid separation: separating insoluble substances in the tailed vegetable enzymolysis liquid in the step S2 to obtain a tailed vegetable enzymolysis stock solution without solid impurities;
s4, liquid fertilizer production: the waste vegetable stock solution is used as a raw material for producing the liquid fertilizer, and is freely mixed with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution and a medium-trace element mother solution according to different set formulas to obtain the waste vegetable liquid fertilizer with comprehensive nutrients suitable for different crops.
The method for producing the high-efficiency liquid fertilizer by using the waste vegetables comprises the following steps of S1 raw material pretreatment: after the regional tail vegetables are collected, preprocessing the regional tail vegetables, and crushing and homogenizing the regional tail vegetables by using a homogenizer to obtain tail vegetable homogenate liquid; step S2 enzymolysis: transferring the tailed vegetable homogenate obtained in the step S1 into an enzymolysis tank, adding a proper amount of complex enzyme dispersant for enzymolysis, degrading and liquefying the tailed vegetable homogenate to the maximum extent, and improving the fluidity of the tailed vegetable homogenate so as to utilize the tailed vegetable to the maximum extent; step S3 solid-liquid separation: filtering larger undecomposed insoluble substances through a three-stage separation tank, and connecting a solid-liquid separator to the lowest-layer separation tank to obtain a tail vegetable enzymolysis stock solution without solid impurities; step S4 liquid fertilizer production: the waste vegetable enzymatic hydrolysate is used as a raw material for producing the liquid fertilizer, and is freely mixed with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution and a medium-trace element mother solution according to different set formulas to obtain the waste vegetable liquid fertilizer with comprehensive nutrients suitable for different crops.
Preferably, the pretreatment in step S1 is to wash the tail vegetables to remove impurities and pesticides.
Further preferably, in step S1, the cleaning is to add a commercially available vegetable cleaning agent to remove impurities and pesticides.
Preferably, the complex enzyme dispersant in step S2 comprises complex biological enzyme and dispersant, wherein the complex biological enzyme comprises methyl-p-phospho-sulfur hydrolase, lipase, pectinase and cellulase, and the dispersant comprises corn starch and rice hull powder.
Preferably, the mass ratio of the composite biological enzyme to the dispersing agent in the step S2 is 1: 10.
Preferably, the mass ratio of the methyl-p-phospho-sulfur hydrolase, the lipase, the pectinase and the cellulase in the step S2 is 20-30: 15-35.
Further preferably, the mass ratio of the methyl-p-phospho-sulfur hydrolase, the lipase, the pectinase and the cellulase in the step S2 is 30:20:15: 35.
Further preferably, the mass ratio of the corn starch to the rice hull powder in the step S2 is 1: 1.
Preferably, the addition amount of the complex enzyme dispersant in the step S2 is 0.2-1.0% of the rape homogenate.
Further preferably, the addition amount of the complex enzyme dispersant in the step S2 is 0.2% of the rape homogenate.
Preferably, the enzymolysis condition in step S2 is 5-9 days at normal temperature.
Further preferably, the enzymolysis condition in step S2 is 7-9 days at normal temperature.
Preferably, the separation in step S3 is a three-stage filtration separation.
Preferably, in step S3, the separated enzymolysis solution of the tail vegetable is processed by a communicated solid-liquid separator to remove impurities such as solid insoluble substances remaining in the enzymolysis solution of the tail vegetable, so as to obtain an enzymolysis stock solution of the tail vegetable without solid impurities; the solid matters separated from the bottom of the separation tank and the solid-liquid separator can be collected for composting.
Preferably, the separated enzymolysis liquid of the waste vegetables in the step S3 is filtered by a disc filter, the precision of the disc filter is 200 μm, and fine solid impurities are removed, so that the produced liquid fertilizer meets the requirements of various irrigation facilities.
The device for the method for producing the high-efficiency organic liquid fertilizer by using the waste vegetables comprises a cleaning component, a conveying component, a refiner, an enzymolysis separation tank, a solid-liquid separator, a disc filter, a first centrifugal pump, a first valve, a waste vegetable liquid raw material tank, a plurality of mother liquid tanks, a second valve, a second centrifugal pump, a finished product mixing tank and a terminal control component; the cleaning assembly is connected with a refiner through a conveying assembly, and the refiner is arranged above the enzymolysis tank; a discharge port of the enzymolysis separation tank is connected with a feed port of the solid-liquid separator; the inlet of the first centrifugal pump is connected with the discharge port of the solid-liquid separator through a disc filter, the outlet of the first centrifugal pump is connected with the feeding port of the tail vegetable liquid raw material tank through a feeding pipe, and a first valve is arranged on the feeding pipe; the discharge gate of tail dish liquid head tank passes through the trunk line and connects finished product blending tank, and a plurality of mother liquor jar passes through the small transfer line and links to each other with the trunk line, is equipped with second valve and second centrifugal pump on the trunk line, installs the valve on every small transfer line respectively, and the terminal control subassembly is through the play liquid measure of each jar of body of each valve control.
Preferably, the cleaning assembly is a bubble cleaning machine.
Preferably, the refiner is a tissue crushing refiner, and the tail vegetables are subjected to harmless treatment by the refiner.
Preferably, the enzymolysis separation tank comprises a first-stage enzymolysis tank, a second-stage separation tank and a third-stage separation tank, wherein the first-stage enzymolysis tank, the second-stage separation tank and the third-stage separation tank are sequentially communicated from high to low, and the three are separated by a screen.
Preferably, the mother liquid tank comprises a medium trace element liquid tank, an organic solution tank, a nitrogen solution tank, a phosphorus solution tank and a potassium solution tank; each tank body is provided with a branch pipeline connected with the main pipeline.
Preferably, an agitator is arranged in the mixing tank.
Preferably, the mixing tank is provided with a weighing device to control the addition amount of different raw materials.
Preferably, the terminal control assembly can automatically calculate the required usage amount of different raw material fertilizer liquids according to field data collected by an agronomic engineer.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a method for producing a high-efficiency organic liquid fertilizer by utilizing a tailed vegetable enzymolysis stock solution, wherein fresh tailed vegetables are subjected to enzymolysis after being crushed and homogenized, the tailed vegetables do not need to be dehydrated, and the tailed vegetable stock solution is obtained through enzymolysis and multi-stage filtration, so that the utilization rate of the tailed vegetables is improved to the maximum extent; the waste vegetable treatment liquid-containing liquid compound fertilizer can increase the crop yield, promote the growth and the quality of crops, and respectively increase the yield, the plant height, the soluble protein, the soluble sugar and the vitamin C of lettuce by 13.4 percent, 30.21 percent, 12.57 percent, 17.86 percent and 31.53 percent.
2. The device is simple and convenient, is particularly suitable for industrial and large-scale production of the high-efficiency organic liquid fertilizer in areas where the waste vegetables are concentrated, and can improve the comprehensive utilization benefit of the waste vegetables.
3. The method for preparing the liquid fertilizer from the waste vegetables has reasonable production process and low construction cost, and the steps from the raw materials to the finished liquid fertilizer are relatively simple and practical. Can realize the highly automatic production of the full-nutrient liquid fertilizer without the dehydration step of the fresh tailstocks. The method provides an effective utilization way for realizing the cyclic utilization of agricultural waste resources, fundamentally solves the problem of utilization of the waste vegetables, and realizes the change of waste into valuable and efficient utilization.
Drawings
FIG. 1 is a flow chart of the device used in the method for producing the high-efficiency organic liquid fertilizer by using the waste vegetables.
FIG. 2 shows the difference of COD content in the waste vegetable liquid of different addition amounts of the enzymolysis dispersant.
FIG. 3 shows the difference of solid content after the complex enzyme fermentation for 7 days according to different mass ratios.
Detailed Description
The invention is further described with reference to the drawings and the following detailed description, which are not intended to limit the invention in any way. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Unless otherwise indicated, in the reagents and materials used in the following examples
The raw material sources are as follows: the methyl-p-thiophosphoryl hydrolase is a self-made enzyme preparation of methyl-p-thiophosphoryl hydrolase genes purchased in laboratories, and the enzyme activity is 15 ten thousand U/g;
lipase: jiangsu Ruichi Biotechnology Limited, enzyme activity is 10 ten thousand U/g;
and (3) pectinase: wuhanbo Juxin Biotechnology GmbH, enzyme activity 50 ten thousand U/g;
cellulase: shenzhen topology Biotech Limited, enzyme activity 20 ten thousand U/g.
Example 1 apparatus for use in a method for producing a highly efficient organic liquid fertilizer from waste vegetables
A device used in a method for producing a high-efficiency organic liquid fertilizer by using waste vegetables is composed of a cleaning machine 1, a conveyor belt 2, a crushing and homogenizing machine 3, an enzymolysis separation tank 4, a solid-liquid separator 5, a disc filter 6, a first centrifugal pump 7, a first electromagnetic valve 8, a waste vegetable liquid raw material tank 9, a medium trace element liquid tank 10, an organic solution tank 11, a nitrogen solution tank 12, a phosphorus solution tank 13, a potassium solution tank 14, a second electromagnetic valve 15, a second centrifugal pump 16, a finished product mixing tank 17, a stirrer 18 and a terminal control system 19. Wherein the enzymolysis separation tank 4 comprises a first-stage enzymolysis tank 4-1, a second-stage separation tank 4-2 and a third-stage separation tank 4-3.
The cleaning machine 1 is connected with a crushing and homogenizing machine 3 through a conveyor belt 2, the crushing and homogenizing machine 3 is arranged above a primary enzymolysis tank 4-1, the primary enzymolysis tank 4-1, a secondary separation tank 4-2 and a tertiary separation tank 4-3 are sequentially communicated from high to low, and the three are separated by a stainless steel screen; the solid-liquid separator 5 is directly connected with a discharge hole of the third-stage separation tank 4-3; the inlet of the first centrifugal pump 7 is connected with the solid-liquid separator 5 through a disc filter 6, the outlet is connected with the feeding port of a tail vegetable liquid raw material tank 9 through a feeding pipe, and a first electromagnetic valve 8 is arranged on the feeding pipe; the discharge of the tail vegetable liquid raw material tank 9 is connected with a finished product mixing tank 17 through a main pipeline, and a stirrer 18 is arranged in the mixing tank 17; the medium trace element liquid tank 10, the organic solution tank 11, the nitrogen solution tank 12, the phosphorus solution tank 13 and the potassium solution tank 14 are connected with a main pipeline through branch pipelines, a second electromagnetic valve 15 and a second centrifugal pump 16 are arranged on the main pipeline, and each branch pipeline is respectively provided with a pneumatic valve; the terminal control system 19 controls the liquid outlet amount of each tank body by controlling each valve.
The use method and principle of the device are as follows: directly dumping the collected waste vegetables into a feed inlet of a cleaning machine 1, directly putting the cleaned waste vegetables into a crushing refiner 3 through a conveyor belt 2, arranging the crushing refiner 3 above a first-stage enzymolysis tank 4-1, directly flowing the crushed and homogenized waste vegetable liquid into the first-stage enzymolysis tank 4-1, arranging stainless steel filter screens with different heights in the first-stage enzymolysis tank 4-1, a second-stage separation tank 4-2 and a third-stage separation tank 4-3, sucking the coarsely filtered waste vegetable enzymatic hydrolysate through a solid-liquid separator 7 after enzymolysis, secondarily filtering the waste vegetable enzymatic hydrolysate with larger solid residues through a disc filter 6 to ensure the fineness of the waste vegetable enzymatic hydrolysate as a production raw material, opening a first electromagnetic valve 8 to suck the waste vegetable enzymatic hydrolysate into a waste vegetable liquid raw material tank 9 through a first centrifugal pump 7 for standby, and controlling the waste vegetable liquid raw material tank 9 through a terminal control system 19, Opening and closing of electromagnetic valves above the medium trace element liquid tank 10, the organic solution tank 11, the nitrogen solution tank 12, the phosphorus solution tank 13 and the potassium solution tank 14 and operation of a second centrifugal pump 16, wherein a stirrer 18 is matched with the finished product mixing tank 17, so that uniform mixing of different raw materials and water can be guaranteed, meanwhile, the finished product mixing tank 17 is provided with a weighing device for controlling the adding amount of the different raw materials, and the required formula liquid fertilizer is obtained by continuously stirring for more than half an hour.
Example 2 difference of COD content of tail vegetable liquid with different addition amounts of enzymolysis dispersant
A method for producing a high-efficiency liquid fertilizer by using waste vegetables comprises the following steps:
(1) pretreatment of raw materials: and cleaning the tail vegetables by using a commercially available fruit and vegetable cleaning agent after the tail vegetables are collected, and crushing and homogenizing by using a tissue crushing and homogenizing machine to obtain tail vegetable homogenate.
(2) Enzymolysis: and (2) adding 0.2%, 0.5%, 0.8% and 1% of enzymolysis dispersing agent into the tailed vegetable homogenate obtained in the step (1) respectively for enzymolysis, and performing enzymolysis for 7 days at normal temperature, so that the tailed vegetable homogenate is degraded and liquefied to the maximum extent, and the fluidity of the tailed vegetable homogenate is improved. The composite biological enzyme and the dispersant in the composite enzyme dispersant are mixed in a mass ratio of 1: 10. The composite biological enzyme comprises methyl-p-phospho-sulfur hydrolase, lipase, pectinase and cellulase which are mixed according to the mass ratio of 30:20:15:35, and the dispersing agent comprises corn starch and rice hull powder which are mixed according to the mass ratio of 1: 1.
(3) Solid-liquid separation: separating larger undecomposed insoluble substances by the three-stage separation tank, and connecting the lowest-layer separation tank with a solid-liquid separator to obtain the tail vegetable enzymolysis stock solution without solid impurities.
(4) Production of liquid fertilizer: the waste vegetable enzymolysis stock solution is used as a raw material for producing the liquid fertilizer, and is freely mixed with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution and a medium-trace element mother solution according to different set formulas to obtain the high-efficiency liquid fertilizer with comprehensive nutrients suitable for different crops.
The specific operation steps of the determination of the enzymolysis liquid are that 3ml of the enzymolysis liquid diluted by 100 times is taken to be arranged in a digestion tube, 1ml of masking agent is accurately added by a liquid transfer gun to be mixed uniformly, 3ml of the digestion liquid and 5ml of catalyst are sequentially added, a sealing cover is screwed tightly and mixed uniformly, the digestion tube is arranged in a thunder magnetic COD detection device according to a certain sequence, digestion is carried out for 90min at 165 ℃, the absorbance is determined by a visible spectrophotometer at the wavelength of 600nm after natural cooling, and the COD value of the tailed vegetable enzymolysis liquid is calculated through a standard curve equation and the dilution multiple of fermentation liquid. The difference of COD content of the tail vegetable liquid with different addition amounts of the enzymolysis dispersant is shown in figure 2.
The COD value of the tail vegetable liquid obtained by adding 0.2%, 0.5%, 0.8% and 1% of the enzymolysis dispersing agent into the tail vegetable homogenate liquid for enzymolysis is detected, and the COD value of each treatment shows a trend of gradually increasing and then rapidly decreasing, reaches a maximum value on day 6 and then tends to be stable. On the whole, the trend that the increase of the dosage of the enzymolysis dispersing agent does not cause obvious influence on the COD content is considered, and the comprehensive cost is considered, the optimal addition amount of the enzymolysis dispersing agent is 0.2%, and the optimal enzymolysis period is 7-9 days.
Example 3 influence of different proportions of the composite biological enzyme on the enzymolysis efficiency of the waste vegetables
A method for producing a high-efficiency liquid fertilizer by using waste vegetables comprises the following steps:
(1) pretreatment of raw materials: and cleaning the tail vegetables by using a commercially available fruit and vegetable cleaning agent after the tail vegetables are collected, and crushing and homogenizing by using a tissue crushing and homogenizing machine to obtain tail vegetable homogenate.
(2) Enzymolysis: and (2) adding an enzymolysis dispersing agent accounting for 0.2% of the tailed vegetable homogenate obtained in the step (1) into the tailed vegetable homogenate for enzymolysis, and performing enzymolysis for 7 days at normal temperature to degrade and liquefy the tailed vegetable homogenate to the maximum extent and improve the fluidity of the tailed vegetable homogenate. The composite biological enzyme and the dispersant in the composite enzyme dispersant are mixed in a mass ratio of 1: 10. The composite biological enzyme comprises methyl-p-phospho-sulfur hydrolase, lipase, pectinase and cellulase which are mixed, and the mixture ratio of different mass ratios is 25:25:25:25, 30:20:15:35 and 20: 30:35:15, and the dispersant comprises corn starch and rice hull powder which are mixed in a mass ratio of 1: 1. The difference of the solid content after the complex enzyme fermentation for 7d in different mass ratios is shown in figure 3.
(3) Solid-liquid separation: separating larger undecomposed insoluble substances by the three-stage separation tank, and connecting the lowest-layer separation tank with a solid-liquid separator to obtain the tail vegetable enzymolysis stock solution without solid impurities.
(4) Production of liquid fertilizer: the waste vegetable enzymolysis stock solution is used as a raw material for producing the liquid fertilizer, and is freely mixed with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution and a medium-trace element mother solution according to different set formulas to obtain the high-efficiency liquid fertilizer with comprehensive nutrients suitable for different crops.
The enzymolysis efficiency of the compound biological enzymes with different proportions can be reflected by detecting the solid content of the tailed vegetable enzymolysis liquid, and the detection finds that the solid content of the compound biological enzymes with the mass proportion of 30:20:15:35 is the lowest, so that the tailed vegetable enzymolysis liquid is more favorable for later separation, filtration and production. Meanwhile, the mass ratio of 30:20:15:35 shows that the tail vegetable liquid has lighter odor and is more favorable for being used as a raw material to produce commercial liquid fertilizer.
Example 4 production of high-efficiency liquid fertilizer from Doederia auriculata
A method for producing a high-efficiency liquid fertilizer by using waste vegetables comprises the following steps:
(1) pretreatment of raw materials: and cleaning the tail vegetables by using a commercially available fruit and vegetable cleaning agent after the tail vegetables are collected, and crushing and homogenizing by using a tissue crushing and homogenizing machine to obtain tail vegetable homogenate.
(2) Enzymolysis: and (2) adding an enzymolysis dispersing agent accounting for 0.2% of the tailed vegetable homogenate obtained in the step (1) into the tailed vegetable homogenate for enzymolysis, and performing enzymolysis for 7 days at normal temperature to degrade and liquefy the tailed vegetable homogenate to the maximum extent and improve the fluidity of the tailed vegetable homogenate. The composite biological enzyme and the dispersant in the composite enzyme dispersant are mixed in a mass ratio of 1: 10. The composite biological enzyme comprises methyl-p-phospho-sulfur hydrolase, lipase, pectinase and cellulase which are mixed according to the mass ratio of 30:20:15:35, and the dispersing agent comprises corn starch and rice hull powder which are mixed according to the mass ratio of 1: 1.
(3) Solid-liquid separation: separating larger undecomposed insoluble substances by the three-stage separation tank, and connecting the lowest-layer separation tank with a solid-liquid separator to obtain the tail vegetable enzymolysis stock solution without solid impurities.
(4) Production of liquid fertilizer: the waste vegetable enzymolysis stock solution is used as a raw material for producing the liquid fertilizer, and is freely mixed with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution and a medium-trace element mother solution according to different set formulas to obtain the high-efficiency liquid fertilizer with comprehensive nutrients suitable for different crops.
Comparative example 1:
(1) pretreatment of raw materials: after the tail vegetables are collected, cleaning the tail vegetables by using a commercially available fruit and vegetable cleaning agent, squeezing the tail vegetable juice by using a solid-liquid separator to obtain a large amount of tail vegetable residues, and collecting the obtained tail vegetable juice for later use.
(2) Enzymolysis: and (2) adding a complex enzyme dispersing agent accounting for 0.2% of the waste vegetable juice into the waste vegetable juice obtained in the step (1) for enzymolysis, and performing enzymolysis for 7 days at normal temperature to fully perform enzymolysis on the waste vegetable juice to the maximum extent. The composite biological enzyme and the dispersant in the composite enzyme dispersant are mixed in a mass ratio of 1: 10. The composite biological enzyme comprises methyl-p-phospho-sulfur hydrolase, lipase, pectinase and cellulase which are mixed according to the mass ratio of 30:20:15:35, and the dispersing agent comprises corn starch and rice hull powder which are mixed according to the mass ratio of 1: 1.
(3) And (3) filtering: and (3) carrying out three-stage filtration on the tail vegetable juice subjected to enzymolysis to obtain the tail vegetable juice enzymolysis stock solution without impurities.
(4) Production of liquid fertilizer: the rape juice enzymolysis stock solution is used as a raw material for producing the liquid fertilizer, and is freely mixed with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution and a medium-trace element mother solution according to different set formulas to obtain the high-efficiency liquid fertilizer with comprehensive nutrients suitable for different crops.
Example 5 field application experiment for preparing liquid compound fertilizer by using waste vegetable liquid
(1) Test background
Test site: pinhancun, mountain and crane, Jiangmen, Guangdong province
Test time: 3/2020-6/2020
And (3) test crops: lettuce
Test soil: loam soil
Test protocol: the experiment is provided with three treatments of preparing a liquid compound fertilizer by the waste vegetable treatment solution prepared in the embodiment 1 of the invention, preparing a liquid compound fertilizer by the waste vegetable juice treatment solution prepared in the comparative example 1 and applying a conventional fertilizer. The conventional fertilization adopts macroelement water soluble fertilizer (N: P: K is 16: 16: 16) commonly adopted by local growers, namely 'Jiashili' of New City chemical industry Co.
The fertilization modes are drip irrigation;
the formula of the waste vegetable treatment liquid-containing liquid compound fertilizer is as follows: 10 parts of the waste vegetable treatment liquid obtained in the example 4, 8 parts of nitrogen solution, 2 parts of phosphorus solution, 5 parts of potassium solution and 0.1 part of medium-trace element liquid are fully and uniformly mixed, poured into a fertilizer dissolving pool, added with a proper amount of water, and injected into a field irrigation pipeline by using a fertilizer injection pump, and meanwhile, the EC value of the field fertilizer water is ensured to be about 2.5.
The formula of the liquid compound fertilizer containing the treatment solution of the tailed vegetable juice comprises the following components: 10 parts of the waste vegetable treatment liquid obtained in the comparative example 1, 8 parts of nitrogen solution, 2 parts of phosphorus solution, 5 parts of potassium solution and 0.1 part of medium-trace element liquid, fully and uniformly mixed, poured into a fertilizer dissolving pool, added with a proper amount of water, and injected into a field irrigation pipeline by using a fertilizer injection pump, and meanwhile, the EC value of the field fertilizer water is ensured to be about 2.5.
(2) The test results are shown in tables 1, 2 and 3.
TABLE 1 influence of tailed vegetable fertilizer and reference fertilizer on lettuce yield
The results in table 1 show that compared with the conventional macroelement water-soluble fertilizer, the application of the waste vegetable treatment liquid-containing liquid compound fertilizer by drip irrigation increases the yield of lettuce, the yield per mu is increased by 246.5kg, and the yield is increased by 13.4%; the drip irrigation application of the compound fertilizer containing the rape juice treating fluid of the comparative example 1 also increases the yield of lettuce, the yield per mu is increased by 75.3kg, and the yield is increased by 4.1 percent; the yield increase rate of the liquid compound fertilizer containing the waste vegetable juice treating fluid of the example 4 is obviously higher than that of the compound fertilizer containing the waste vegetable juice treating fluid of the comparative example 1.
Table 2: influence of tailed vegetable fertilizer and contrast fertilizer on lettuce growth
The results in table 2 show that compared with the conventional macroelement water-soluble fertilizer, the drip irrigation application of the waste vegetable treatment liquid-containing liquid compound fertilizer promotes the growth of lettuce, and the plant height, the leaf area and the fresh weight of the overground part are respectively increased by 30.21%, 6.49% and 10.55%; the growth promotion of the liquid compound fertilizer containing the waste vegetable treatment liquid in the embodiment 4 on lettuce is better than that of the compound fertilizer containing the waste vegetable juice treatment liquid in the comparative example 1, and meanwhile, the growth promotion effect is obvious compared with that of the conventional fertilizer, and the growth promotion effect is particularly expressed on the plant height; and the average fresh weight of the overground part of the tail vegetable fertilizer treatment is obviously higher than that of other treatments.
Table 3: influence of tailed vegetable fertilizer and contrast fertilizer on lettuce quality
The results in table 3 show that the tail vegetable fertilizer has the effect of improving the quality of the lettuce, and the content of soluble protein, soluble sugar and vitamin C in the treatment of the tail vegetable fertilizer is obviously higher than that in the treatment of the tail vegetable juice fertilizer and the conventional fertilizer. Compared with the conventional macroelement water-soluble fertilizer, the soluble protein, the soluble sugar and the vitamin C of the lettuce applied by drip irrigation with the waste vegetable treatment liquid-containing liquid compound fertilizer are respectively increased by 12.57%, 17.86% and 31.53%.
Therefore, the effect of the fertilizer prepared by homogenizing the waste vegetables, fermenting the homogenized waste vegetables and separating the fermented waste vegetables is better. Meanwhile, the treatment liquid containing the tailed vegetable is simple to prepare, the drip irrigation application of the liquid compound fertilizer containing the treatment liquid containing the tailed vegetable does not cause the fault of a field irrigation system, and the tailed vegetable fertilizer can better meet the requirements of modern green agriculture in the modern times that quality agriculture is more and more deeply concentrated. The application range of the waste vegetable treatment liquid-containing liquid compound fertilizer produced by the invention is greatly improved, and the marketability of the fertilizer is also greatly improved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A method for producing a high-efficiency organic liquid fertilizer by using waste vegetables is characterized by comprising the following steps:
s1, raw material pretreatment: collecting the waste vegetables, pretreating, crushing and homogenizing to obtain waste vegetable homogenate liquid;
s2, enzymolysis: adding a complex enzyme dispersant into the tailed vegetable homogenate obtained in the step S1 for enzymolysis;
s3, solid-liquid separation: separating insoluble substances in the tailed vegetable enzymolysis liquid in the step S2 to obtain a tailed vegetable enzymolysis stock solution without solid impurities;
s4, liquid fertilizer production: the waste vegetable enzymolysis stock solution is used as a raw material for producing the liquid fertilizer, and is freely mixed with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution and a medium-trace element mother solution according to different set formulas to obtain the waste vegetable liquid fertilizer with comprehensive nutrients suitable for different crops.
2. The method of claim 1, wherein the pretreatment in step S1 is washing the tail vegetables to remove impurities and pesticides.
3. The method of claim 1, wherein the complex enzyme dispersant in step S2 comprises complex biological enzyme and dispersant, wherein the complex biological enzyme comprises methyl-p-phospho-sulfur hydrolase, lipase, pectinase and cellulase, and the dispersant comprises corn starch and rice hull powder.
4. The method as claimed in claim 1, wherein the amount of the complex enzyme dispersant added in step S2 is 0.2-1.0% of the homogenate of the carrageen.
5. The method according to claim 1, wherein the enzymolysis condition in step S2 is 5-9 days at normal temperature.
6. The method of claim 1, wherein the separation of step S3 is a three-stage filtration separation.
7. The device for the method for producing the high-efficiency organic liquid fertilizer by using the waste vegetables is characterized by consisting of a cleaning component, a conveying component, a refiner, an enzymolysis separation tank, a solid-liquid separator, a disc filter, a first centrifugal pump, a first valve, a waste vegetable liquid raw material tank, a plurality of mother liquid tanks, a second valve, a second centrifugal pump, a finished product mixing tank and a terminal control component; the cleaning assembly is connected with a refiner through a conveying assembly, and the refiner is arranged above the enzymolysis tank; a discharge port of the enzymolysis separation tank is connected with a feed port of the solid-liquid separator; the inlet of the first centrifugal pump is connected with the discharge port of the solid-liquid separator through a disc filter, the outlet of the first centrifugal pump is connected with the feeding port of the tail vegetable liquid raw material tank through a feeding pipe, and a first valve is arranged on the feeding pipe; the discharge gate of tail dish liquid head tank passes through the trunk line and connects finished product blending tank, and a plurality of mother liquor jar passes through the small transfer line and links to each other with the trunk line, is equipped with second valve and second centrifugal pump on the trunk line, installs the valve on every small transfer line respectively, and the terminal control subassembly is through the play liquid measure of each jar of body of each valve control.
8. The device of claim 7, wherein the enzymolysis separation tank comprises a first-stage enzymolysis tank, a second-stage separation tank and a third-stage separation tank, the first-stage enzymolysis tank, the second-stage separation tank and the third-stage separation tank are communicated in sequence from high to low, and the three are separated by a screen.
9. The device according to claim 7, wherein the mother liquid tank comprises a medium trace element liquid tank, an organic solution tank, a nitrogen solution tank, a phosphorus solution tank and a potassium solution tank; each tank body is provided with a branch pipeline connected with the main pipeline.
10. The apparatus of claim 7 wherein an agitator is provided in said compounding tank.
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