CN106914484B - Ecological restoration method for rural solid waste polluted soil - Google Patents
Ecological restoration method for rural solid waste polluted soil Download PDFInfo
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- CN106914484B CN106914484B CN201710209182.7A CN201710209182A CN106914484B CN 106914484 B CN106914484 B CN 106914484B CN 201710209182 A CN201710209182 A CN 201710209182A CN 106914484 B CN106914484 B CN 106914484B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The present invention belongs toIn the technical field of soil remediation, in particular to an ecological remediation method for rural solid waste polluted soil, which comprises the following steps: (1) uniformly mixing and stirring fermented cow and sheep manures and modified zeolite according to a weight ratio of 2: 1.4-1.6 to obtain an ecological restoration material; (2) the obtained ecological restoration material is used for 80-90 kg/666.7m2Applying the soil to be repaired, wherein the application method can adopt ditching application or spaying application on a spacious soil surface; (3) watering 6-8 days after the ecological restoration material is applied every time. The ecological restoration method has good effects in the aspects of adjustment and improvement of the polluted soil, the respiration intensity of the polluted soil, the amylase of the polluted soil, the catalase of the polluted soil, the sucrase of the polluted soil, ammonia nitrogen of leachate of the polluted soil, leaching toxicity of the polluted soil and the like.
Description
Technical Field
The invention belongs to the technical field of soil remediation, and particularly relates to an ecological remediation method especially suitable for rural solid waste polluted soil in Huang-Huai-Hai area.
Background
In recent years, after the industrial pollution source is continuously and effectively controlled, the problem of non-point source pollution in vast rural areas is highlighted, and the method becomes one of the key fields of future environmental pollution control in China. The rural solid waste comprises rural domestic waste, agricultural waste, rural township enterprise production (such as various workshops), livestock breeding waste, forestry waste, fishery waste, rural building waste and the like. Rural solid waste is an important environmental pollution source and a disease transmission source, and pollutes the environment in the modes of solid substances, exuded liquid substances, released gaseous substances, transmitted diseases and the like, so that the health of human bodies is harmed. With the development of rural economy and the change of agricultural structure and cultivation mode, the rural solid waste has the tendency of increasing production, complicating components and exacerbating pollution degree. In the non-point source pollution load, the rural solid waste occupies an important proportion and is the most important pollution source for environmental pollution, soil pollution and rainwater runoff water body pollution. However, the research on the solid waste pollution control technology in rural areas in China is very late, the attention degree is not enough, the technology accumulation is not much, and the practical experience is not good. The solid waste pollution control system suitable for rural areas in China is still under exploration. China is developing new rural construction, and the technical research and development of the rural solid waste polluted ecological environment, the polluted soil and the polluted runoff water body are urgently needed.
The solid waste polluted soil has the following characteristics:
1. contains high-concentration organic pollutants, ammonia nitrogen, heavy metals and other pollution components;
2. the toxicity is high, and the biological agent has obvious toxic action on organisms;
3. the content of pathogenic viruses, bacteria and the like is high;
4. the polluted soil has great influence on the ecological environment and has serious influence on the production and survival of human beings.
At present, the polluted soil remediation technology can be roughly divided into three main categories, namely physical remediation, chemical remediation and biological remediation:
(1) physical repair: in general, the physical remediation technology is mainly based on the physical specificity of the pollutants, and the aim of separating or removing the pollutants from the soil is achieved through modification conditions, and the main technologies comprise: basic physical separation, electromagnetic separation and steam stripping.
(2) Chemical remediation, namely, chemical remediation can be divided into in-situ chemical remediation and ex-situ chemical remediation, in-situ chemical remediation (a remediation technology without removing excavated soil, generally, chemical remediation agents are mixed into soil on site, then, the remediation agents react with pollutants in the soil in situ, and finally, the pollutants are eliminated, fixed or reduced in biotoxicity, generally, according to differences of adding modes of the chemical remediation agents, the chemical remediation agents are classified into four types, namely, ① ploughing method, through a ploughing or weeding mode, the remediation agents are mixed into the soil as uniformly as possible in a hooking mode in the process, ② spiral drilling method, through a municipal engineering mode, the remediation agents are mixed into the soil in a drilling mode, ③ irrigation method, the chemical remediation agents are dissolved into a solvent, the solution is added into the soil through a mode similar to agricultural irrigation, and ④ spraying method, and liquid chemical remediation agents or the solution are uniformly sprayed into the soil through a sprayer.
(3) Biological repair: bioremediation generally includes both microbial and phytoremediation categories.
The current microbial remediation technology which is applied in practice relatively more generally comprises ① ectopic remediation, generally excavating soil, putting the soil into a reactor to accelerate the biological reaction of the soil or artificially creating an environment which is beneficial to the microbial reaction to accelerate the degradation of the pollutants, and ② in-situ remediation, wherein the microbial community is promoted to more efficiently utilize the pollutants to carry out life activities and simultaneously degrade the pollutants by adding inorganic nutrition or oxygen.
Phytoremediation is a biological process that takes advantage of certain enrichment characteristics, typically specific to plants, to absorb, transform or immobilize contaminants. Some plants have stronger enrichment characteristic to heavy metal, and when heavy metal concentration is in certain extent in soil, can utilize these plants to absorb the heavy metal in the soil to the plant tissue body, and then through modes such as reaping, the plant residue that has richened the heavy metal handles in unison.
The soil remediation technology for single pollutants at home and abroad has been researched and applied more, but at present, the problems of high cost, difficult implementation and the like still exist. The current composite pollution problem formed by the comprehensive combination of various pollutants is quite serious, for example, the pollution sources with complex pollution components such as rural solid waste polluted soil and the like. The repair technology of a single pollutant cannot meet the comprehensive repair requirements of multiple pollutants, so that the development of a corresponding repair technology aiming at certain special composite pollution becomes a hotspot.
In summary, currently, a large amount of rural solid wastes in China cause serious pollution to soil through rainfall leaching, and meanwhile cause great harm to the ecological environment and the health of people in China, but an effective treatment or remediation technology is not available for soil pollution caused by vast rural wastes at present, and the research on ecological remediation technology for polluted soil has very urgent needs.
Disclosure of Invention
Aiming at the problems, the invention provides an ecological restoration method for rural solid waste contaminated soil, which has good effects in the aspects of contaminated soil adjustment and improvement, contaminated soil respiration intensity, contaminated soil amylase, contaminated soil catalase, contaminated soil sucrase, contaminated soil leachate ammonia nitrogen, contaminated soil leaching toxicity and the like.
In order to solve the problems, the invention is realized by the following technical scheme:
an ecological restoration method for rural solid waste polluted soil is designed, and comprises the following steps:
(1) uniformly mixing and stirring fermented cow and sheep manures and modified zeolite in a weight ratio of 2: 1.4-1.6 to obtain an ecological restoration material;
(2) the obtained ecological restoration material is used for 80-90 kg/666.7m2Applying the soil to be repaired, wherein the application method can adopt ditching application or spaying application on a spacious soil surface; preferably, the ecological restoration material is applied in 3 times of spring, summer and autumn, the specific time is 3 middle and last days of month, 5 middle and last days of month and 7 last days of month respectively, and the three times of application amount respectively accounts for 40%, 35% and 25% of the total amount;
(3) watering 6-8 days after the ecological restoration material is applied every time, wherein the irrigation quantity is 85-125 m3/666.7m2。
According to the invention, specific mineral materials and animal wastes are used as modifiers to be added into the polluted soil, so that the soil heavy metal or refractory organic matter is well fixed or removed; the adopted mineral materials or animal dung (especially cattle and sheep dung) and other natural repair materials can easily enter an ecological cycle chain to repair polluted soil, so that the risk of secondary pollution can be greatly reduced, and the mineral materials can promote the adsorption, chelation, redox and other effects of heavy metals to reduce the mobility of the heavy metals when entering the soil; the animal waste contains a large amount of easily degradable organic matters, can promote the activity of microorganisms and accelerate the degradation of difficultly degradable organic matters and toxic and harmful substances.
According to the research of the inventor for many years, the use amount of the fermented cow and sheep manure is proper, and the improvement effect on the ecological restoration of the polluted soil cannot be achieved when the amount of the fermented cow and sheep manure is too much or too little, particularly, the improper dosage of the modified zeolite can cause the soil alkalinity to be too strong, so that the inhibition effect on the life activities of microorganisms is generated.
Preferably, the fermented cow and sheep manure is prepared by the following steps:
a. mixing materials: adding 1kg of organic fertilizer fermentation powder into every 5 tons of cow and sheep manure (the initial water content is 12-15 wt%, wherein the weight ratio of the cow manure to the sheep manure is 1: 3-3.5), and uniformly mixing.
Preferably, the number of effective active bacteria in the organic fertilizer fermentation powder is not less than 100 hundred million/g, and the dominant bacteria group comprises: lactobacillus plantarum, enterococcus faecalis, protease, corn protein powder, whey powder, lactose and the like, and the organic fertilizer leavening agents in the market at present have many types, such as: such as special bacteria for fermentation of gold organic fertilizer and cow dung leaven of Beijing Huiminda scientific and technological development center。The organic fertilizer fermentation powder needs to be mixed with rice bran, wheat bran or corn flour according to the proportion of 1: 10, and then adding the mixture into cow and sheep manures.
b. Material stacking: controlling the water content of the obtained material to be 62-68%, preparing the material into a fermentation pile with the height of 1.5-2 meters, the width of 2 meters and the length of 2-4 meters, and having a good fermentation effect; too small and too short a pile can not be made, which can affect fermentation; preferably, the method for controlling the water content of the material comprises the following steps: when the water content is too high, the crop straw or the mushroom residue is added, and when the water content is too low, the water is added. Too high and too low water content is not beneficial to fermentation, too little water is used, and the fermentation is slow; too much water can lead to poor ventilation, slow temperature rise, and odor generation. The method for quickly judging whether the water content is proper or not comprises the following steps: the hand grips a handle of material tightly, the finger seams can see the watermark but does not drip water, and the material is preferably scattered when falling to the ground.
c. Fermentation management: starting a fermentation reaction at a temperature of not less than 15 ℃, turning the reactor when the temperature is raised to over 75 ℃ (the temperature is too high and has influence on nutrients), controlling the temperature to be 62-68 ℃, and finishing the fermentation when the whole material is black brown and the temperature is reduced to the normal temperature.
Preferably, the modified zeolite is prepared by the following steps:
a. soaking clinoptilolite with the diameter of 1-2 mm in 6wt% NaCl aqueous solution for at least 1 hour to meet the requirement of ion exchange modification;
b. filtering the clinoptilolite, placing the clinoptilolite in a microwave oven, and treating the clinoptilolite by using microwaves (the wavelength is 120-130 mm) with 960W power for 10-15 min;
c. and (3) putting the clinoptilolite into sufficient distilled water, uniformly stirring and soaking for 20-30 min, then filtering out the clinoptilolite, and drying at 105 ℃ to constant weight to obtain the modified zeolite.
More than 40 kinds of zeolites are found in the world at present, but the characteristics of various kinds of zeolites have certain differences. Through a large number of comparative tests and long-term research, clinoptilolite is selected, the zeolite can adsorb ammonia nitrogen in sewage containing calcium and magnesium ions with high selectivity, the ammonia nitrogen in soil can be reduced from 45mg/kg to 1mg/kg, and the adsorption efficiency of natural zeolite on ammonia nitrogen can be improved remarkably after the zeolite is modified by the method; through detection, the modified product has the boiling content of more than 70 percent, the ammonia absorption of more than 166.02mmol/100g, and contains various elements such as calcium Ca, magnesium Mg, potassium K, sodium Na, phosphorus P, manganese Mn, zinc Zn, copper Cu, boron B, molybdenum Mo, iron Fe, cobalt Co and the like, and the ion exchange property and the exchange selectivity of the modified product have obvious effects of improving the activity of enzymes in organisms, promoting metabolism and enhancing the disease resistance of the organisms.
The invention has the following positive and beneficial technical effects:
(1) the raw materials for repairing the polluted soil are environment-friendly and low-price materials, and the selected materials have wide sources and have the potential of large-scale standardized application. And a scientific raw material decomposing and modifying treatment method is provided based on theoretical analysis and scientific experiments.
(2) The invention provides a reasonable combination of fermented cow and sheep manure and modified zeolite, discloses a fertilizing amount and a fertilizing method for ecological restoration of contaminated soil, solves the problems of raw material price and secondary pollution after restoration of the conventional ecological restoration method, and has good effects in the aspects of adjustment and improvement of contaminated soil, respiratory strength of the contaminated soil, amylase, catalase, invertase, ammonia nitrogen in leachate of the contaminated soil, leaching toxicity of the contaminated soil and the like.
Drawings
Fig. 1 shows the situation of compound row pollution in the northern bank of the Heihe river, which benefits the tributary of Huaihe river.
Detailed Description
The following examples are given to facilitate a better understanding of the invention, but do not limit the invention.
Example 1: the experiment site of the example selects Xinglong county, Yudong water conservancy test station, and occupies 50 mu of land, the land is located on the northern bank of the Huijian river, which is a main drainage river of Zhengzhou and Kaifeng city, and almost accepts the whole sewage discharge of the Kaifeng city, the experiment land utilizes the Huijian river water for irrigation, and serious composite row pollution is caused, as shown in figure 1, and the soil pollution components are shown in table 1.
TABLE 1 soil pollution ingredient Table
Ecological restoration is carried out on the polluted farmland soil by adopting the following specific steps:
(1) uniformly mixing and stirring fermented cow and sheep manures and modified zeolite according to a weight ratio of 2:1.5 to obtain an ecological restoration material;
(2) the obtained ecological restoration material is added at a ratio of 85kg/666.7m2Applying the soil to be repaired, wherein the application method can adopt ditching application or spaying application on a spacious soil surface; the ecological restoration material is applied in spring, summer and autumn for 3 times, wherein the specific time is 3 middle and last days of month, 5 middle and last days of month and 7 last days of month, and the three times of application amount respectively account for 40%, 35% and 25% of the total amount;
(3) watering 7 days after each application of the ecological restoration material, wherein the irrigation quantity is 100m3/666.7m2Other management measures are consistent with local planting habits.
The fermented cow and sheep manure is prepared by the following steps:
a. mixing materials: adding 1kg of organic fertilizer fermentation powder into every 5 tons of cow and sheep manure (the initial water content is 12wt%, wherein the weight ratio of the cow manure to the sheep manure is 1: 3), and uniformly mixing; the organic fertilizer fermentation powder is a cow dung leavening agent purchased from Beijing Huiminda scientific and technological development center, the number of effective active bacteria is not less than 100 hundred million/g, and the organic fertilizer fermentation powder and rice bran, wheat bran or corn flour are mixed according to the proportion of 1: 10, then adding the mixture into the cattle and sheep manure;
b. material stacking: controlling the water content of the obtained material to 658%, and making into fermentation pile with height of 1.8 m, width of 2m, and length of 3 m;
c. fermentation management: starting fermentation reaction at 20 ℃, turning when the temperature is raised to over 75 ℃ (the nutrient is influenced by too high temperature), controlling the temperature at 65 ℃, and finishing fermentation when the whole material is black brown and the temperature is reduced to normal temperature.
The modified zeolite is prepared by the following steps:
a. soaking clinoptilolite with the diameter of 1-2 mm in 6wt% NaCl aqueous solution for at least 1 hour to meet the requirement of ion exchange modification;
b. filtering the clinoptilolite, placing in a microwave oven, and treating with 960W microwave (wavelength of 122 mm) for 15 min;
c. putting the clinoptilolite in sufficient distilled water, stirring uniformly, soaking for 25min, then filtering out the clinoptilolite, and drying at 105 ℃ to constant weight to obtain the modified zeolite.
The restored soil is measured by a graphite furnace atomic absorption spectrophotometry, and monitoring proves that after combined restoration, the farmland soil can reach or exceed the two types of standards, and the individual value reaches the one type of soil standard. The method is mainly suitable for planting in general farmlands, vegetable fields, tea garden orchards, pastures and the like, and the soil quality basically does not cause harm and pollution to plants and the environment. The repair experiment starts from 2016, 4 and 15 days, and the monitoring values of 2016, 6 and 15 days to 10 and 15 days are shown in Table 2.
TABLE 2 Hubei test station restored soil test value (mg/kg)
Example 2: an ecological restoration method for rural solid waste polluted soil comprises the following steps:
(1) uniformly mixing and stirring fermented cow and sheep manures (same as in example 1) and modified zeolite (same as in example 1) in a weight ratio of 2:1.4 to obtain an ecological restoration material;
(2) the obtained ecological restoration material is added at a ratio of 80kg/666.7m2Applying the soil to be repaired, wherein the application method can adopt ditching application or spaying application on a spacious soil surface; specifically, the ecological restoration material is applied in spring, summer and autumn for 3 times, wherein the specific time is 3 middle and last ten days of month, 5 middle and last ten days of month and 7 last ten days of month, and the three application amounts respectively account for 40%, 35% and 25% of the total amount;
(3) watering 8 days after each application of the ecological restoration material, wherein the irrigation quantity is 125m3/666.7m2。
Example 3: an ecological restoration method for rural solid waste polluted soil comprises the following steps:
(1) uniformly mixing and stirring fermented cow and sheep manures (same as example 1) and modified zeolite (same as example 1) in a weight ratio of 2: 1.6 to obtain an ecological restoration material;
(2) the obtained ecological restoration material is added at a ratio of 90kg/666.7m2Applying the soil to be repaired, wherein the application method can adopt ditching application or spaying application on a spacious soil surface; specifically, the ecological restoration material is applied in spring, summer and autumn for 3 times, wherein the specific time is 3 middle and last ten days of month, 5 middle and last ten days of month and 7 last ten days of month, and the three application amounts respectively account for 40%, 35% and 25% of the total amount;
(3) watering 6 days after each application of the ecological restoration material, wherein the irrigation quantity is 85m3/666.7m2。
Experiments show that the fermented cow and sheep manure organic fertilizer and modified zeolite combined remediation of the polluted soil has the following effects:
(1) effect of Combined remediation on the pH of contaminated soil
The combined remediation of the fermented cow and sheep manure organic fertilizer and the modified zeolite can obviously improve the acid-base environment of soil, so that the soil is in a range suitable for living of organisms. The combined remediation experiment proves that the pH value of the combined remediation polluted soil is in the range of 7.0-8.5 on day 38, and the combined remediation polluted soil belongs to the range suitable for the life activities of microorganisms.
(2) Effect of combined remediation on respiration intensity of contaminated soil
Soil respiration intensity generally includes soil microbial respiration, soil root respiration, soil animal respiration, and chemical oxidation of carbonaceous minerals. The respiratory intensity of polluted soil can be enhanced by the combined restoration of the fermented cattle and sheep manure organic fertilizer and the modified zeolite, the fermented cattle and sheep manure organic fertilizer can supplement nutrient substances necessary for soil microorganisms, balance the proportion of nutrient elements of the soil and improve the acid-base buffer capacity of the soil, and the modified zeolite can improve the porosity of the soil and adsorb toxic components such as ammonia nitrogen in the soil. On the 38 th day of combined remediation, the soil respiration intensity is improved to 1.3g/m from the original 1.052.h, 23.8% improvement.
(3) Effect of Combined remediation on contaminated soil Amylase
The fermented cow and sheep manure organic fertilizer can effectively improve the amylase level of the polluted soil, can simultaneously improve the soil fertility and the particle morphology, and has longer improvement effect duration. After the modified zeolite powder enters the soil, the modified zeolite powder quickly adsorbs mixed liquor consisting of organic matters, ammonia nitrogen, water and the like in gaps among soil particles, and after the adsorption process is neutralized, cations on the surface of the zeolite crystal begin to generate ion exchange reaction to promote soil enzyme metabolism. Experiments prove that on the 38 th day of combined remediation, the content of the amylase in the polluted soil is increased from 4.5mg/g to 5.2mg/g and is increased by 15.6%.
(4) Effect of combined remediation on contaminated soil Hydrogen peroxide
The combined repair of the fermented cow and sheep manure organic fertilizer and the modified zeolite can obviously enhance the catalase activity of the polluted soil. The accumulation of hydrogen peroxide in soil can produce toxic action on microorganisms, and catalase can effectively eliminate toxic effect. Experiments prove that on the 38 th day of combined restoration, the catalase is improved from the original 4.0mg/g to 6.3mg/g, and is improved by 57.5 percent.
(5) Effect of combined remediation on sucrase in contaminated soil
Sucrase activity is related to the organic content of the soil and is more dependent on the type of organic matter. The organic fertilizer for cattle and sheep can effectively improve the activity of soil sucrase, and promotes microorganisms to convert macromolecular organic matters into micromolecular organic matters due to the supplement of a large amount of nutrient substances, so that the sucrase is stimulated to be generated. The modified zeolite can quickly adsorb toxic component ammonia nitrogen, improve the pH value of soil, and promote the activity of sucrase under the condition of reasonable dosage. Experiments prove that on the 38 th day of combined remediation, the soil sucrase is improved to 55.0mg/g from the original 1.5mg/g by 35 times.
(6) Influence of combined remediation on ammonia nitrogen in leachate of polluted soil
The existence of a proper amount of ammonia nitrogen in the soil is beneficial, the soil fertility can be improved, and the existence of excessive ammonia nitrogen can generate toxic action on soil microorganisms on one hand and exceed the adsorption capacity of the soil to cause pollution by infiltrating underground water with rainwater or flowing into surface water. After the cow and sheep manure organic fertilizer is reasonably added into the polluted soil, the ammonia nitrogen leaching is reduced in the initial stage of culture, and is slightly higher than that in the control group in the final stage of culture. After the modified zeolite is added, the leaching of the ammonia nitrogen in the soil is obviously weakened due to the excellent adsorption performance of the modified zeolite. On the 38 th day of combined remediation, the ammonia nitrogen in the soil is reduced to 0.18mg/g from the original 0.55mg/g, and is reduced by 67%.
(7) Effect of combined remediation on Leaching toxicity of contaminated soil
The combined restoration of the cow and sheep manure organic fertilizer and the modified zeolite has an obvious effect on reducing the leaching toxicity of the polluted soil, and experiments prove that the leaching toxicity of the polluted soil is reduced from 53 percent to 38 percent and is reduced by 15 percent on the 38 th day of the combined restoration.
Claims (7)
1. An ecological restoration method for rural solid waste polluted soil is characterized by comprising the following steps:
(1) uniformly mixing and stirring fermented cow and sheep manures and modified zeolite according to the weight ratio of 2: 1.4-1.6 to obtain an ecological restoration material for later use;
the modified zeolite is prepared by the following steps:
(a) soaking clinoptilolite with the diameter of 1-2 mm in 6wt% NaCl aqueous solution for at least 1 hour to meet the requirement of ion exchange modification;
(b) filtering the clinoptilolite, placing the clinoptilolite in a microwave oven, and treating the clinoptilolite by microwaves with 960W power for 10-15 min;
(c) putting the clinoptilolite into sufficient distilled water, uniformly stirring and soaking for 20-30 min, then filtering out the clinoptilolite, and drying at 105 ℃ to constant weight to obtain modified zeolite;
(2) the obtained ecological restoration material is added at a ratio of 80-90 kg/666.7m2Applying the soil to be repaired, wherein the application method can adopt ditching application or spaying application on a spacious soil surface;
(3) watering 6-8 days after the ecological restoration material is applied every time, wherein the irrigation quantity is 85-125 m3/666.7m2。
2. The ecological restoration method for rural solid waste polluted soil according to claim 1, characterized in that: the wavelength of the microwave in the step (b) is 120-130 mm.
3. The ecological restoration method for rural solid waste polluted soil according to claim 1, characterized in that: in the step (2), the ecological restoration material is applied for 3 times in spring, summer and autumn, the specific time is 3 middle and last ten days of month, 5 middle and last ten days of month and 7 last ten days of month, and the three times of application amount respectively accounts for 40%, 35% and 25% of the total amount.
4. The ecological restoration method for rural solid waste polluted soil according to claim 1, characterized in that: the fermented cow and sheep manure is prepared by the following steps:
(a) mixing materials: adding 1kg of organic fertilizer fermentation powder into every 5 tons of cattle and sheep manure, and uniformly mixing;
(b) material stacking: controlling the water content of the materials obtained in the previous step to be 62-68%, and preparing the materials into a fermentation pile with the height of 1.5-2 meters, the width of 2 meters and the length of 2-4 meters;
(c) fermentation management: starting a fermentation reaction at a temperature of not less than 15 ℃, turning when the temperature is raised to be more than 75 ℃, controlling the temperature to be 62-68 ℃, and finishing the fermentation when the whole material is black brown and the temperature is reduced to normal temperature.
5. The ecological restoration method for rural solid waste polluted soil according to claim 4, characterized in that: the initial water content of the cow and sheep manure is 12-15 wt%, wherein the weight ratio of the cow manure to the sheep manure is 1: 3 to 3.5.
6. The ecological restoration method for rural solid waste polluted soil according to claim 4, characterized in that: in the step (a), the number of effective active bacteria in the organic fertilizer fermentation powder is not less than 100 hundred million/g, and the organic fertilizer fermentation powder and rice bran, wheat bran or corn flour are mixed according to the ratio of 1: 10, and then adding the mixture into the cow and sheep manure.
7. The ecological restoration method for rural solid waste polluted soil according to claim 4, characterized in that: in step (b), the method for controlling the water content of the material comprises the following steps: when the water content is too high, the crop straw or the mushroom residue is added, and when the water content is too low, the water is added.
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| AU2020203535B2 (en) * | 2020-05-29 | 2023-01-19 | Vrm International Pty Ltd | A method for large scale biological hydrosynthesis, energy generation and storage, and/or topsoil restoration |
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| CN105732207A (en) * | 2016-03-10 | 2016-07-06 | 董万里 | Soil ecological restoration conditioner and preparation method thereof and soil ecological restoration method |
| CN106147778A (en) * | 2016-07-04 | 2016-11-23 | 河北省农林科学院农业资源环境研究所 | Passivator, preparation method and applications for repairing heavy metal in soil combined pollution |
| CN106396793A (en) * | 2016-08-30 | 2017-02-15 | 夏百庆 | Bio-organic fertilizer and preparation method thereof |
| CN106810407A (en) * | 2017-03-21 | 2017-06-09 | 淄博泰诚生物科技有限公司 | A kind of ecological organic fertilier and preparation method thereof |
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