CN115136869A - Method for preparing landfill planting soil by utilizing mineralized refuse humus soil - Google Patents
Method for preparing landfill planting soil by utilizing mineralized refuse humus soil Download PDFInfo
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- CN115136869A CN115136869A CN202210873653.5A CN202210873653A CN115136869A CN 115136869 A CN115136869 A CN 115136869A CN 202210873653 A CN202210873653 A CN 202210873653A CN 115136869 A CN115136869 A CN 115136869A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
Abstract
The invention relates to a method for preparing planting soil of a landfill by utilizing mineralized refuse humus soil, which comprises the following steps: s1, excavating a waste landfill to obtain stale refuse, and sieving to obtain mineralized refuse humus soil; s2, detecting the pH value and the heavy metal content of the mineralized waste humus soil; s3, determining the using amount of clean soil required by preparation of the compound soil, and detecting the pH value and the heavy metal content of the clean soil; s4, mixing the clean soil and the mineralized garbage humus soil to obtain compound soil, and detecting the pH value, organic matters, hydrolyzable nitrogen, available phosphorus and quick-acting potassium of the compound soil and the clean soil; and S5, adjusting the pH value, organic matters, hydrolyzable nitrogen, available phosphorus and available potassium in the compound soil by using a soil testing and formula fertilizing technology to obtain the planting soil. The method can effectively and reasonably treat the humus to prepare the planting soil suitable for plant growth, effectively improve the fertility of the planting soil and greatly reduce the treatment cost of the landfill.
Description
Technical Field
The invention belongs to the technical field of ecological environment treatment, and particularly relates to a method for preparing landfill soil by utilizing mineralized refuse humus soil.
Background
The sanitary landfill is a main mode for disposing domestic garbage in China, and the sanitary landfill refers to the process of conveying the domestic garbage to a designated area and performing landfill, wherein the area is a garbage landfill site. The domestic garbage is gradually increased due to the improvement of living standard of people, so that a large amount of storage capacity of the landfill is saturated, secondary pollution is easily caused by the landfill, stink is generated in the peripheral area of the landfill and germs are transmitted and inserted to the periphery, the peripheral area of the landfill is not suitable for living and normal operation of people, and therefore the waste landfill needs to be treated urgently at present.
At present, the main components of the stale refuse in the landfill comprise light combustible substances, humus soil, brick and tile stones, metal, glass and other recoverable components, wherein the content of the humus soil accounts for more than 50% of that of the excavated refuse, the output of the humus soil is high, and the humus soil has good hydraulic transmission and physicochemical properties and is rich in nitrogen, phosphorus, potassium and other nutrient substances. The method for processing the landfill in the prior art mainly comprises the steps of carrying out other uses on excavated stale refuse through resale or other means, backfilling soil (clean soil for short) purchased from nearby construction sites or mining enterprises in the landfill for planting plants, and adding a large amount of nutrients into the clean soil as the clean soil contains less nutrients suitable for the growth of the plants, so that the invention provides the method for preparing the landfill planting soil by utilizing mineralized refuse humus.
Disclosure of Invention
The invention provides a method for preparing planting soil of a landfill site by utilizing mineralized refuse humus soil, which can prepare the humus soil with the heavy metal content meeting the specification into the planting soil suitable for plant growth by a reasonable and simple preparation method, effectively improve the fertility of the planting soil and greatly reduce the treatment cost of the landfill site.
The technical scheme adopted by the invention is as follows:
a method for preparing planting soil of a landfill by utilizing mineralized refuse humus soil comprises the following steps:
s1, excavating a waste landfill and obtaining aged refuse, and sieving the aged refuse to obtain mineralized refuse humus soil;
s2, extracting a soil sample from mineralized waste humus soil with each preset amount, and detecting the pH value and the heavy metal content in the soil sample, wherein the heavy metal content is required to meet the regulation of CJ/T340-2011-greening planting soil;
s3, determining the using amount of clean soil required for preparing the compound soil, wherein the mass ratio of the clean soil to the mineralized garbage humus soil is greater than or equal to 1, and detecting the pH value and the heavy metal content of the clean soil, wherein the pH value and the heavy metal content of the clean soil are in accordance with the regulation of CJ/T340-2011-greening planting soil;
s4, uniformly mixing clean soil and mineralized garbage humus soil to obtain compound soil, respectively detecting pH values, organic matters, hydrolyzable nitrogen, available phosphorus and quick-acting potassium in the compound soil and the clean soil, skipping step S5 when a detection result accords with the regulation of CJ/T340-2011-greening planting soil, and executing step S5 when the detection result does not accord with the regulation of CJ/T340-2011-greening planting soil;
and S5, according to the detection result of the compound soil and the total amount of the compound soil in the step S4, at least one of indexes of pH value, organic matters, hydrolyzable nitrogen, available phosphorus and quick-acting potassium in the compound soil is adjusted by using a soil testing and formulated fertilization technology, so that the indexes of the pH value, the organic matters, the hydrolyzable nitrogen, the available phosphorus and the quick-acting potassium in the compound soil meet the regulation of CJ/T340-2011-greening planting soil.
Further, the mineralized refuse humus soil with preset amount in the step S2 is500m 3 。
Further, the heavy metal content detection comprises detection of Hg, cd, zn, cu, cr, pb, ni and As content.
Further, in step S5, the adjustment is performed by a fertilizer selected from at least one of a calcium magnesium phosphate fertilizer, urea and a commercial organic fertilizer.
Further, step S3 includes: the total amount of the clean soil and the mineralized refuse humus soil is = the total amount of the compound soil, and the total amount of the compound soil is the amount of the compound soil which needs to be backfilled to a designated area of a landfill.
Further, step S5 is followed by step S6,
and S6, backfilling the compound soil in a designated area of the landfill.
Compared with the prior art, the invention has the beneficial effects that:
1. mineralized waste humus soil in the planting soil is derived from a storage domestic waste landfill, the problems of soil hardening and plant growth inhibition caused by directly serving as a greening matrix can be avoided by proportioning other raw materials, on-site resource utilization of the humus soil can be realized, and the treatment cost of the waste landfill is saved.
2. The mineralized waste humus soil planting soil obtained by the invention can improve the storage amount of carbon in a carbon reservoir of the soil when being applied to the soil, and can provide nutrients for the growth of plants while improving the soil fertility and the soil structure.
3. The soil testing formula method adopted by the invention reasonably applies nitrogen, phosphorus, potassium and organic fertilizer according to the fertility characteristics of the planting soil and the nutrient requirement of the whole life cycle of the plant, coordinates the relationship of the three aspects of the nutrient requirement of the plant, the soil supply and the fertilization and supplementation, realizes the comprehensive and balanced supply of various nutrients required by the growth of the plant, and finally realizes the purposes of saving expenses, improving efficiency and having high quality.
Drawings
FIG. 1 is a photograph of a landfill excavation;
FIG. 2 is a photograph of mineralized waste humus soil obtained by sieving;
FIG. 3 is a photograph of a landfill after backfilling and planting;
FIG. 4 is a photograph of a plant grown one year after planting;
Detailed Description
In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.
A method for preparing planting soil of a landfill by utilizing mineralized refuse humus soil comprises the following steps:
s1, taking a waste landfill of a certain place as an object, excavating the waste landfill to obtain aged garbage, and screening the aged garbage by adopting garbage screening equipment to obtain mineralized garbage humus soil 1439m 3 (see FIGS. 1 and 2), the landfill has a floor area of about 5553.7m 2 Belongs to II-level protective forest land and country construction land, and the areas are 3146.08m 2 And 2402.28m 2 (ii) a Because the forest land needs to ensure the growth of vegetation for a long time, the construction land only needs to temporarily plant the turf to consolidate the backfilling effect so as to prevent water and soil loss, and plants cannot be planted for a long time subsequently, the forest land needs to be backfilled to 1m away from the ground by clean soil, and then 3146.08m is used 3 The compound soil is filled and leveled, and the construction land needs to be firstly backfilled to 0.2m away from the ground by utilizing clean soil and then is utilized to 480m 3 Filling and leveling the common planting soil.
S2, every 500m 3 Extracting a soil sample from the mineralized garbage humus soil, extracting 5 soil samples (containing 1 parallel sample and 1 quality control sample), and detecting the pH value and the heavy metal content in the extracted soil sample, wherein the heavy metal content is required to meet the regulation of CJ/T340-2011-greening planting soil;
s3, determining the clean soil dosage required by the preparation of the compound soil, wherein the clean soil dosage meets the following requirements: the total amount of clean soil plus mineralized refuse humus soil = the total amount of the compound soil, and the volume ratio of the clean soil to the mineralized refuse humus soil should be greater than or equal to 1, so that the required ratio of clean soil to mineralized refuse humus soil is 1.25, and the amount of clean soil is 1707m 3 (ii) a And further 480m is required 3 Cleaning soil to prepare common planting soil for backfilling construction land; detecting the pH value and heavy metal content of the clean soil byThe pH value and the heavy metal content of the clean soil both accord with the regulation of CJ/T340-2011-greening planting soil;
specifically, the heavy metal content detection comprises the detection of Hg, cd, zn, cu, cr, pb, ni and As content;
the detection results of the pH values and the heavy metal contents of the mineralized waste humus soil and the clean soil are shown in the table 1:
TABLE 1
S4, uniformly mixing clean soil and mineralized garbage humus soil to obtain compound soil, respectively detecting pH values, organic matters, hydrolyzable nitrogen, available phosphorus and quick-acting potassium in the compound soil and the clean soil, skipping step S5 when a detection result accords with the regulation of CJ/T340-2011-greening planting soil, and executing step S5 when the detection result does not accord with the regulation of CJ/T340-2011-greening planting soil;
wherein, the detection results of the pH value, organic matter, hydrolyzable nitrogen, available phosphorus and quick-acting potassium of the mineralized garbage humus soil and clean soil are shown in a table 2:
TABLE 2
S5, according to the detection result and the total amount of the compound soil in the step S4, adjusting one or more of the pH value, organic matters, hydrolyzable nitrogen, available phosphorus and quick-acting potassium of the compound soil by using a soil testing formula fertilization technology to ensure that the indexes of the pH value, the organic matters, the hydrolyzable nitrogen, the available phosphorus and the quick-acting potassium in the compound soil all accord with the regulation of CJ/T340-2011-greening planting soil;
in addition, according to the detection results in the table 2 and the amount of clean soil for preparing the common planting soil, one or more of a pH value, organic matters, hydrolyzable nitrogen, available phosphorus and quick-acting potassium are adjusted by using a soil testing formula fertilization technology, so that the indexes of the pH value, the organic matters, the hydrolyzable nitrogen, the available phosphorus and the quick-acting potassium in the common planting soil all accord with the regulation of CJ/T340-2011-greening planting soil;
specifically, in the step S5, at least one of calcium magnesium phosphate fertilizer, urea and commercial organic fertilizer is used for regulation;
therefore, referring to the detection results in the table 2, the organic matter content of the compound soil only does not meet the related requirements of greening planting soil (CJ/T340-2011), so that the organic matter content is increased only by adding commercial organic fertilizer. Based on economic applicability and nutrient requirements of planted plants, the target value of the organic matter content of the garbage site is about 25g/kg, the organic matter content of the forest land and the construction land of the garbage site is calculated to be about 50.7 tons and 12.2 tons respectively by adopting the principle of soil testing and formulated fertilization technology, and the organic matter content of the selected sheep manure commercial organic fertilizer is 49 percent, so that the sheep manure commercial organic fertilizer to be applied is about 103.5 tons and 24.9 tons respectively.
Wherein, the statistics of the materials used in the refuse landfill are shown in a table 3, and the treatment expense is shown in a table 4:
TABLE 3
TABLE 4
Because the purchase cost of clean soil is 40 yuan/m 3 And the purchase cost of the sheep manure organic fertilizer is 760 yuan/ton. As can be seen from Table 4, the compound soil has the advantages that the humus soil replaces part of clean soil to purchase cost, the humus soil contains higher organic matters, the organic fertilizer purchase cost is greatly saved, and compared with the common planting soil, the unit cost is 32.5 yuan/m less 3 The unit cost is reduced by about 41%.
S6, backfilling the forest land and the construction land respectively by utilizing the compound soil and the common planting soil, planting the grass on the two ground surfaces, and tracking and monitoring the growth characters of the grass for one year, wherein the result shows that the grass seeds in the area (construction land) planted by adopting the common planting soil have poor growth vigor and slow growth speed; in the areas (forest lands) planted by adopting the compound soil, the soil has high nutrient content, the soil structure is good, the plants grow well, and obvious phenomena of dead seedlings and pest disasters do not occur, as shown in figures 3 and 4.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A method for preparing planting soil of a landfill by utilizing mineralized refuse humus soil is characterized by comprising the following steps:
s1, excavating a waste landfill and obtaining aged refuse, and sieving the aged refuse to obtain mineralized refuse humus soil;
s2, extracting a soil sample from each preset amount of mineralized waste humus soil, and detecting the pH value and the heavy metal content in the soil sample, wherein the heavy metal content is required to meet the regulation of CJ/T340-2011-greening planting soil;
s3, determining the dosage of clean soil required for preparing the compound soil, wherein the volume ratio of the dosage of the clean soil to the dosage of the mineralized garbage humus soil is more than or equal to 1, and detecting the pH value and the heavy metal content of the clean soil, wherein the pH value and the heavy metal content of the clean soil are in accordance with the regulation of CJ/T340-2011-greening planting soil;
s4, uniformly mixing clean soil and mineralized refuse humus soil to obtain compound soil, respectively detecting pH values, organic matters, hydrolyzable nitrogen, available phosphorus and quick-acting potassium in the compound soil and the clean soil, skipping the step S5 when the detection result accords with the regulation of CJ/T340-2011-greening planting soil, and executing the step S5 when the detection result does not accord with the regulation of CJ/T340-2011-greening planting soil;
and S5, according to the detection result of the compound soil and the total amount of the compound soil in the step S4, at least one of indexes of pH value, organic matters, hydrolyzable nitrogen, available phosphorus and quick-acting potassium in the compound soil is adjusted by using a soil testing and formulated fertilization technology, so that the indexes of the pH value, the organic matters, the hydrolyzable nitrogen, the available phosphorus and the quick-acting potassium in the compound soil conform to the regulation of CJ/T340-2011-greening planting soil.
2. The method of claim 1, wherein the predetermined amount of the mineralized waste humus soil in step S2 is 500m 3 。
3. The method for preparing the planting soil of the landfill with the mineralized refuse humus soil according to the claim 1, wherein the heavy metal content detection comprises detection of Hg, cd, zn, cu, cr, pb, ni and As content.
4. The method of using humic soil of mineralized refuse to make planting soil for landfill as claimed in claim 1, wherein the step S5 is performed by using at least one fertilizer selected from calcium magnesium phosphate fertilizer, urea and commercial organic fertilizer.
5. The method for preparing the planting soil of the landfill with the mineralized refuse humus soil according to the claim 1, wherein the step S3 comprises: the total amount of the clean soil and the mineralized refuse humus soil is = the total amount of the compound soil, and the total amount of the compound soil is the amount of the compound soil to be backfilled to a designated area of a landfill.
6. The method for preparing the planting soil for the landfill site by utilizing the mineralized refuse humus soil as claimed in claim 1, wherein the step S5 is followed by a step S6,
and S6, backfilling the compound soil in the designated area of the landfill.
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Citations (6)
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| CN102180727A (en) * | 2011-01-17 | 2011-09-14 | 重庆交通大学 | Surface layer composite soil for ecological remediation of refuse landfill |
| CN108311531A (en) * | 2017-12-26 | 2018-07-24 | 广东宝汇环保科技有限公司 | A kind of house refuse agent, soil treatment method |
| CN108817024A (en) * | 2018-05-22 | 2018-11-16 | 北京建筑大学 | A kind of Mineralized Wastes in Landfill Site method of comprehensive utilization and system |
| CN108971197A (en) * | 2018-07-13 | 2018-12-11 | 北京广泰源合嘉环保工程有限公司 | A kind of storage sieving garbage comprehensive treatment method for recycling |
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| RU2738420C1 (en) * | 2020-03-26 | 2020-12-14 | Общество с ограниченной ответственностью "Экоцикл" | Method for elimination of solid waste landfill |
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- 2022-07-21 CN CN202210873653.5A patent/CN115136869A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180727A (en) * | 2011-01-17 | 2011-09-14 | 重庆交通大学 | Surface layer composite soil for ecological remediation of refuse landfill |
| CN108311531A (en) * | 2017-12-26 | 2018-07-24 | 广东宝汇环保科技有限公司 | A kind of house refuse agent, soil treatment method |
| CN108817024A (en) * | 2018-05-22 | 2018-11-16 | 北京建筑大学 | A kind of Mineralized Wastes in Landfill Site method of comprehensive utilization and system |
| CN108971197A (en) * | 2018-07-13 | 2018-12-11 | 北京广泰源合嘉环保工程有限公司 | A kind of storage sieving garbage comprehensive treatment method for recycling |
| CN109454091A (en) * | 2018-11-16 | 2019-03-12 | 长沙凯天工研院环保服务有限公司 | A kind of aerobic compost and microwave leaching technology combination handle aging refuse landfill method humous |
| RU2738420C1 (en) * | 2020-03-26 | 2020-12-14 | Общество с ограниченной ответственностью "Экоцикл" | Method for elimination of solid waste landfill |
Non-Patent Citations (1)
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