Efficient oily sludge stacking process

Abstract

The invention discloses an efficient oily sludge stacking process, and belongs to the technical field of oily sludge treatment. The process comprises the following steps: S1, adding auxiliary materials into oily sludge, and uniformly mixing a mixture of the oily sludge and the auxiliary materials to obtain an oil sludge mixture; s2, adding a nutrient solution into the oil sludge mixture, adjusting the water content of the mixed material, and piling to obtain an oil sludge mixture pile body; and S3, adding a compound microbial agent into the oil sludge mixture pile body, and then putting the oil sludge mixture pile body into a reaction device for microbial degradation treatment. The low-cost co-metabolism matrix organic auxiliary material is introduced, the nutrient solution is matched to stimulate microbial metabolism, then a high-concentration and high-activity functional flora ecological system is formed in an oil sludge mixture pile body, the composite microbial agent is introduced to strengthen the piling effect, the oil content and the water content of the oil-containing sludge are reduced, and the sludge treatment effect is improved. Therefore, harmlessness and reduction of the oily sludge are realized.

Description

Technical Field

[0001] This invention belongs to the field of oily sludge treatment technology, and specifically relates to an efficient oily sludge stockpiling process. Background Technology

[0002] Oily sludge is generated during the exploration, extraction, storage, transportation, refining, and treatment of oily wastewater in the oil and gas industry. With the rapid development of the petroleum industry, the production of oily sludge has been increasing year by year. Statistics show that China produces an average of over five million tons of oily sludge annually, with a market size of nearly 300 billion yuan. Oily sludge contains large amounts of heavy metals, sulfides, benzene compounds, and other substances. These toxic and harmful compounds have strong carcinogenic, teratogenic, and mutagenic effects, posing a serious threat to human health and causing incalculable damage to the ecological environment. In the revised National Hazardous Waste List of 2021, various petrochemical sludge products were identified as hazardous waste (HW08 category). Therefore, the reduction, harmless treatment, and resource-based disposal of oily sludge are imperative.

[0003] Oily sludge treatment technologies are mainly divided into physicochemical treatment and biological treatment. Commonly used physical technologies include incineration, mechanical separation, and pyrolysis, while chemical technologies include chemical cleaning, solvent extraction, and supercritical water oxidation. Biological technologies include land cultivation, bioreactors, and stockpiling. Physicochemical methods often suffer from high energy consumption, complex processes, high costs, and secondary pollution. Patent CN112939394A discloses a pyrolysis process for treating oily sludge. In this invention, the oily sludge is crushed and then fed into a pyrolysis device for pyrolysis. The temperature within the pyrolysis device is controlled within the range of 500-800 degrees Celsius. High-temperature flue gas directly contacts the oily sludge, and the pyrolysis time is controlled within the range of 60-120 minutes, generating compliant sludge residue and flue gas containing combustible gases. After dust removal by a dust removal device, the flue gas is introduced into a combustion chamber for combustion, producing high-temperature flue gas. The high-temperature flue gas is then cooled by a cooling device and introduced into a rapid cooling device to lower the temperature to 180-200 degrees Celsius, generating low-temperature flue gas. The low-temperature flue gas is then treated by a waste gas treatment device to generate compliant flue gas for discharge. This patented technical solution requires a large amount of energy to provide sufficient reaction temperature, and multiple treatment structures are needed to handle the various flue gases generated in the reaction to avoid secondary pollution, significantly increasing costs.

[0004] Compared to physicochemical methods, biological treatment offers advantages such as safety, reliability, cost-effectiveness, and ease of operation, demonstrating a significant advantage in treating low-oil-content oily sludge. Among these, the stockpiling method, due to its low cost, high efficiency, and wide applicability, was listed as the preferred technology for treating petroleum hydrocarbon solid waste in the "Catalogue of Contaminated Site Remediation Technologies (First Batch)" by the Ministry of Environmental Protection in 2014. However, the highest temperature achieved through traditional stockpiling is around 50 degrees Celsius, and the high-temperature period is short-lived, resulting in a long stockpiling cycle and low treatment efficiency. Biostocking refers to a traditional process where oily sludge, fertilizer, and expansion agents (straw, sawdust, wheat straw, and other organic materials) are piled into mounds, with aeration pipes or mixing equipment installed inside the mounds, utilizing bacteria for biodegradation. By adding conditioners to adjust the physicochemical properties of the stockpiled materials, various microorganisms within the stockpile, under aerobic conditions, further decompose the organic matter in the waste into water, carbon dioxide, heat, and humic substances through their own proliferation and metabolism.

[0005] For example, patent CN115677150A discloses a microbial treatment method for oily sludge, employing a biological approach to treat the oily sludge. The technical solution of this patent first pre-treats the oily sludge by removing impurities and adding 0.5-10% (by weight) of auxiliary materials. The oily sludge with added auxiliary materials is then crushed and mixed to obtain an oily sludge mixture for later use. Next, the oily sludge mixture is placed on a prefabricated bed and stacked into strip-shaped piles to obtain an oily sludge mixture pile. The oily sludge mixture pile is then treated using a dynamic strip stacking method: 3-10% (by weight) of a composite microbial agent is added to the oily sludge mixture pile, mixed evenly, and then stacked again. After stacking, the oily sludge mixture pile is continuously aerated and oxygenated. The dynamic strip stacking method involves high-temperature rapid... In the rapid degradation stage, after 15-30 days of biodegradation, the dynamic strip stacking method enters the stabilization stage, after which the ventilation and oxygen supply time is halved. Throughout the dynamic strip stacking process, the oil sludge mixture needs to be replenished with moisture to maintain a water content of 25-40%, and compound microbial agents need to be added to ensure a biomass of no less than 10⁸ CFU / g. After replenishing moisture or compound microbial agents, the oil sludge mixture must be mixed thoroughly and re-stabilized. After 40-80 days in the stabilization stage, the physicochemical parameters of the oil sludge mixture are tested to see if they meet the reuse requirements. If they do, the material is discharged directly; otherwise, the process is repeated until it meets the reuse requirements. This invention's technical solution requires a continuous processing time of 80 days or even longer to ensure the stacked material meets the discharge requirements, resulting in problems such as a long stacking cycle and low stacking efficiency.

[0006] To address the aforementioned problems, this invention provides an efficient oily sludge stockpiling process to solve the issues of high cost, complex process, long stockpiling cycle, and low stockpiling efficiency in existing oily sludge treatment technologies. Summary of the Invention

[0007] The main objective of this invention is to provide an efficient oily sludge stockpiling process to solve the problems of high cost, complex process, long stockpiling cycle and low stockpiling efficiency in existing oily sludge treatment technologies.

[0008] To achieve the above objectives, the present invention provides an efficient oily sludge stockpiling process, comprising the following steps:

[0009] S1, add auxiliary materials to the oily sludge, and then mix the oily sludge and auxiliary materials to obtain an oily sludge mixture;

[0010] S2, add nutrient solution to the oil sludge mixture, adjust the moisture content of the mixture and stack it to obtain an oil sludge mixture pile;

[0011] S3, add the compound microbial agent to the oil sludge mixture pile, and then place the oil sludge mixture pile in the reaction device for microbial degradation treatment.

[0012] Furthermore, the composite microbial agent includes thermophilic bacteria and petroleum-degrading bacteria.

[0013] Furthermore, the thermophilic bacteria are selected from the genus *Bacillus*; the petroleum-degrading bacteria are selected from one or more of the genus *Bacillus*, *Pseudomonas*, *Cladosporium*, or *Brucella*.

[0014] Furthermore, the mass ratio of the composite microbial agent to the volumetric mass of the oil sludge mixture is 2-5%.

[0015] Furthermore, the auxiliary material is selected from one or more of poultry and livestock manure, plant straw, or grain husks.

[0016] Furthermore, the nutrient solution is an extract of animal feces.

[0017] Furthermore, the moisture content of the mixture is 50-70%.

[0018] Furthermore, the microbial degradation treatment includes: continuously aerating and supplying oxygen to the reaction device, utilizing the microbial community in the oil sludge mixture pile for aerobic fermentation, and completing the microbial degradation process of the oily sludge.

[0019] Furthermore, the aeration rate during the aeration and oxygen supply process is 0.2–0.3 L / min / kg dry weight.

[0020] Furthermore, the aerobic fermentation temperature is 50–70°C, and the cycle is 20–50 days.

[0021] Furthermore, the reaction device includes a reactor, the interior of which is provided with a support plate with apertures. The bottom of the reactor is provided with an air inlet and a leachate outlet. The air inlet is connected to an air pump through an air inlet pipe, and the air pump is used to aerate and supply oxygen to the oil sludge mixture. The leachate outlet is connected to a leachate outlet pipe, and the leachate outlet pipe is used to discharge leachate containing oil sludge after microbial degradation.

[0022] Furthermore, the top of the reactor has two holes for inserting a thermometer and collecting gas; a flow controller is installed on the air inlet pipe between the air inlet and the air pump to regulate the aeration rate; the support plate is covered with a nylon mesh to prevent oil sludge particles from clogging the air vents.

[0023] Compared with the prior art, the present invention has the following beneficial effects: The present invention introduces low-cost co-metabolism matrix organic auxiliary materials and combines them with nutrient solution to stimulate microbial metabolism, thereby forming a high-concentration and highly active functional microbial ecosystem in the oil sludge mixture pile. At the same time, the introduction of compound microbial agents (thermophilic bacteria and petroleum-degrading bacteria) enhances the stacking effect, thereby achieving a dual reduction in the oil content and water content of oily sludge, and simultaneously achieving the harmlessness and volume reduction of oily sludge. Attached Figure Description

[0024] Figure 1 A schematic diagram of the reaction apparatus for an efficient oily sludge stockpiling process according to one embodiment of the present invention is shown.

[0025] Figure 2 The diagram shows the change in moisture content of oily sludge in the efficient oily sludge stockpiling process of Embodiment 1 of the present invention;

[0026] Figure 3 The diagram shows the change in oil content of the oily sludge in the efficient oily sludge stockpiling process of Embodiment 1 of the present invention;

[0027] Figure 4 The diagram shows the change in moisture content of oily sludge in the efficient oily sludge stockpiling process of Embodiment 2 of the present invention;

[0028] Figure 5 The diagram shows the change in oil content of the oily sludge in the efficient oily sludge stockpiling process of Embodiment 3 of the present invention.

[0029] The above-mentioned figures include the following reference numerals: 1. Reactor; 2. Support plate; 3. Air pump; 4. Flow controller. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Furthermore, regarding the numerical ranges in this invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each smaller range between any stated value or intermediate value within a stated range, and any other stated value or intermediate value within said range, is also included within this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range. The invention will now be described in detail with reference to embodiments.

[0031] Embodiments of the present invention provide an efficient oily sludge stockpiling process, comprising the following steps:

[0032] S1, add auxiliary materials to the oily sludge, and then mix the oily sludge and auxiliary materials to obtain an oily sludge mixture;

[0033] S2, add nutrient solution to the oil sludge mixture, adjust the moisture content of the mixture and stack it to obtain an oil sludge mixture pile;

[0034] S3, add the compound microbial agent to the oil sludge mixture pile, and then place the oil sludge mixture pile in the reaction device for microbial degradation treatment.

[0035] Existing technologies for treating oily sludge through pyrolysis require significant energy consumption to provide sufficient reaction temperatures. Furthermore, handling the various flue gases generated during the reaction necessitates multiple treatment structures to prevent secondary pollution, greatly increasing costs. Current biological methods for treating oily sludge require 80 days or longer to ensure the stockpiled material meets discharge requirements, necessitating further technological improvements to shorten the stockpiling cycle and enhance efficiency. Therefore, this invention introduces a low-cost co-metabolism matrix additive, combined with nutrient solution, to stimulate microbial metabolism, thereby forming a high-concentration, highly active functional microbial ecosystem within the stockpile. This efficiently shortens the degradation time cycle and increases the degradation rate. Simultaneously, the introduction of composite microbial agents (thermophilic bacteria and petroleum-degrading bacteria) enhances the stockpiling effect, achieving a dual reduction in oil and water content. After 21 days of stockpiling degradation, the oil removal rate of the oily sludge can reach over 78%, solving the problems of long stockpiling cycles, low efficiency, high costs, and complex processes inherent in existing sludge treatment technologies. This achieves the harmlessness and volume reduction of oily sludge.

[0036] In a preferred embodiment of the present invention, the composite microbial agent comprises thermophilic bacteria and petroleum-degrading bacteria. The thermophilic bacteria are selected from the genus *Brevibacillus*, and the petroleum-degrading bacteria are selected from one or more of the genus *Bacillus*, *Pseudomonas*, *Chelatococcus*, or *Brucella*. The *Brevibacillus* agent may, for example, be selected from *Brevibacillus sp. b* and / or *Brevibacillus sp. d*; the *Bacillus* agent may, for example, be selected from *Bacillus sp. H*; the *Pseudomonas* agent may, for example, be selected from *Pseudomonas sp. HT-5*; the *Chelatococcus* agent may, for example, be selected from *Chelatococcus sp. HT-6*; and the *Brucella* agent may, for example, be selected from *Brucella sp. YS-7*.

[0037] The composite microbial agent of this invention includes thermophilic bacteria and petroleum-degrading bacteria. The thermophilic bacteria maintain high activity even at high temperatures (above 50°C), while the petroleum-degrading bacteria catalyze the degradation of hydrocarbons in petroleum into smaller molecules, which then serve as the carbon and energy source for microbial growth. Through the synergistic effect of these two types of bacteria, the stacking efficiency can be effectively improved, and the stacking time cycle can be shortened. More preferably, the mass ratio of the composite microbial agent to the volumetric mass of the oil sludge mixture stack is 2-5%.

[0038] In some optional embodiments of the present invention, the excipients are selected from one or more of poultry and livestock manure, plant straw, or grain husks. Using these organic excipients not only enhances the activity of microbial degradation but also enables waste utilization and reduces environmental pollution. The nutrient solution is an animal manure leachate, which can be, for example, selected from cow manure leachate, sheep manure leachate, etc. Adding the nutrient solution to the oil-sludge mixture of the present invention can provide carbon and nitrogen sources to further stimulate microbial growth.

[0039] In a preferred embodiment of the present invention, the moisture content of the mixture is 50-70%. Controlling the mixture within this range achieves superior biocomposting results, providing an optimal environment for microbial growth and reproduction. High moisture content (>70%) reduces oxygen permeability in the composted mixture, thus inhibiting the growth of aerobic microorganisms. Conversely, low moisture content (<50%) leads to microbial dehydration, affecting nutrient transport during composting and inhibiting microbial activity, resulting in an unstable composting process.

[0040] In a preferred embodiment of the present invention, the microbial degradation treatment includes: continuously aerating and supplying oxygen to the reaction device, utilizing the microbial community in the oil sludge mixture pile for aerobic fermentation, and completing the microbial degradation process of the oily sludge. More preferably, the aeration rate during the aeration and oxygen supply process is 0.2–0.3 L / min / kg dry weight (where the dry weight is the dry weight of the oil sludge mixture pile); the temperature of the aerobic fermentation is 50–70°C, and the cycle is 20–50 days.

[0041] This invention precisely controls the aeration rate. Excessive aeration (greater than 0.3 L / min / kg dry weight) leads to overly dry stockpiles, reducing microbial activity and slowing the decomposition process. Conversely, insufficient aeration (less than 0.2 L / min / kg dry weight) can cause oxygen deficiency, producing foul odors and further slowing the decomposition process. Maintaining appropriate aeration is crucial for ensuring an efficient and odorless stockpiling process. Temperature control is also critical during stockpiling. Excessively high temperatures can kill key microorganisms, and high temperatures (greater than 70°C) cause excessively rapid evaporation of moisture from the stockpiled material, making it overly dry. Conversely, lower temperatures (less than 50°C) result in incomplete decomposition of organic matter, slowing microbial activity and hindering the stockpiling process. Effective temperature management helps optimize the stockpiling process and improve the quality of the stockpiled material.

[0042] In a specific embodiment of the present invention, the efficient oily sludge stockpiling process of the present invention employs a reaction device with the following structure for stockpiling, such as... Figure 1 As shown, the reaction device includes a reactor 1, with a perforated support plate 2 inside. The bottom of the reactor 1 has an air inlet and a leachate outlet. The air inlet is connected to an air pump 3 via an air inlet pipe, which aerates the oil-sludge mixture. The leachate outlet is connected to a leachate outlet pipe, which discharges leachate from the microbial degradation of the oil-sludge. The top of the reactor 1 has two holes for inserting a thermometer and collecting gases (such as ammonia produced during decomposition). A flow controller 4 is installed on the air inlet pipe between the air inlet and the air pump to regulate the aeration rate. The support plate 3 is covered with a nylon mesh to prevent oil-sludge particles from clogging the air holes.

[0043] The present application will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed in the present application.

[0044] Example 1

[0045] Using Daqing Oilfield's polymer-containing oily sludge as the object to be treated, the following steps were followed to treat the oily sludge. The amount of oily sludge to be treated was 250g, and its initial oil content was 6.99%.

[0046] (1) Add auxiliary materials (cow dung and rice husks, with a mass ratio of 3:1 to oily sludge) to oily sludge (250g), mix the oily sludge and auxiliary materials evenly to obtain an oily sludge mixture for later use.

[0047] (2) Add nutrient solution (cow manure leachate) to the oil sludge mixture obtained in step (1), adjust the moisture content of the mixture to 60%, and pile it up to obtain the oil sludge mixture pile.

[0048] (3) Add the compound microbial agent (a mixture of two thermophilic bacteria (Brevibacillus sp.b and Brevibacillus sp.d) and four petroleum-degrading bacteria (Bacillus sp.H, Pseudomonas sp.HT-5, Chelatococcus sp.HT-6 and Brucellasp.YS-7) in equal proportions) to the oil sludge mixture pile in step (2). The ratio of the mass of the bacterial solution to the volume mass of the oil sludge mixture pile is 3%. After completion, place the oil sludge mixture in the reaction device to carry out microbial degradation treatment on the oil sludge mixture pile, that is, continuously aerate and supply oxygen to the reaction device (aeration rate of 0.2L / min / kg dry weight), and use the bacteria in the oil sludge mixture pile to carry out aerobic fermentation (fermentation temperature of 70℃).

[0049] (4) After 21 days of stacking degradation, both the moisture content and oil content gradually decreased with the stacking time, such as Figure 2 As shown, the moisture content of the oil sludge mixture decreased from 60.65% to 10.2%, as... Figure 3 As shown, the oil content of the oil sludge mixture decreased from 2.69% to 1.48%, and the oil removal rate of the oily sludge reached 78.83%.

[0050] Its reaction apparatus, such as Figure 1 As shown, the reaction device includes a reactor 1. The top cover of the reactor is sealed with snaps to keep it warm and moist. The interior of the reactor 1 is equipped with a support plate 2 with perforations to ensure upward airflow. The support plate 3 is covered with a nylon mesh to prevent oil sludge particles from clogging the air vents. The bottom of the reactor 1 is equipped with an air inlet and a leachate outlet. The air inlet is connected to an air pump 3 through an air inlet pipe. The air pump 3 is used to continuously aerate and supply oxygen to the oil sludge mixture. A flow controller 4 is installed on the air inlet pipe between the air inlet and the air pump to regulate the aeration rate. The leachate outlet is connected to a leachate outlet pipe, which is used to discharge the leachate containing oil sludge after microbial degradation. The top of the reactor 1 has two holes for inserting a thermometer and collecting gas (ammonia).

[0051] Example 2

[0052] This embodiment sets up four experimental groups to compare the effects of different types of microbial agents on the oil removal efficiency of oily sludge. Group R1 did not add any microbial agent, Group R2 added thermophilic bacteria, Group R3 added petroleum-degrading bacteria, and Group R4 added both thermophilic and petroleum-degrading bacteria. The specific process of the oily sludge stockpile is the same as in Example 1, the only difference being the addition of microbial agents. The initial oil content of the oily sludge mixture stockpile in all four groups was 2.69%, and the amount of oily sludge treated was 250g. The specific oil removal results are as follows: Figure 4 As shown, the oil content decreased to 2.10%, 1.93%, 1.87%, and 1.82% at 5 days, respectively, indicating that the addition of microbial agents helps to better degrade oily substances in the stockpiled material. With the progress of stockpiling, the oil content finally decreased to 1.63%, 1.58%, 1.51%, and 1.44% at 21 days, respectively. Among them, the oil removal effect of group R4 was 17.92% higher than that of the control group, bringing the oil sludge removal rate to 79.40%, indicating that the continuous addition of thermophilic bacteria and petroleum-degrading bacteria can effectively improve the oil removal effect.

[0053] Example 3

[0054] This embodiment is a scaled-up experiment based on Embodiments 1 and 2, increasing the amount of oily sludge to be treated to 7000g, with an initial oil content of 6.99%. The effect of the control group without added microbial agents on the oil removal efficiency of the oily sludge was compared with that of the experimental group with added thermophilic bacteria and petroleum-degrading bacteria. The specific process is the same as in Embodiment 1, except for the amount of oily sludge treated and the aeration rate during the aeration and oxygen supply process, which is 0.3L / min / kg dry weight.

[0055] The specific results of its oil removal effect are as follows: Figure 5 As shown, after 50 days of stockpiling, the oil content of the control group and the experimental group decreased to 1.55% and 1.22%, respectively, and the oil removal rates of the sludge were 77.83% and 82.55%, respectively. The oil content of the sludge in the experimental group had already decreased to 1.47% at 24 days, which was lower than the oil content of the control group at the final 50 days. This indicates that the addition of thermophilic bacteria and petroleum-degrading bacteria can significantly accelerate petroleum degradation and improve the removal efficiency of oily substances.

[0056] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. The present invention can also be implemented in other specific ways or forms without departing from its spirit or essential characteristics. Therefore, the described embodiments should be considered illustrative rather than limiting in any respect. The scope of the present invention should be defined by the appended claims, and any variations equivalent to the intent and scope of the claims should also be included within the scope of the present invention.

Claims

1. A highly efficient oily sludge stockpiling process, characterized in that, Includes the following steps: S1, add auxiliary materials to the oily sludge, and then mix the oily sludge and auxiliary materials to obtain an oily sludge mixture; S2, add nutrient solution to the oil sludge mixture, adjust the moisture content of the mixture, and then pile it up. A stockpile of oily sludge mixture was obtained; S3, add the compound microbial agent to the oil sludge mixture pile, and then place the oil sludge mixture pile in the reaction device for microbial degradation treatment.

2. The efficient oily sludge stockpiling process according to claim 1, characterized in that, The compound microbial agent includes thermophilic bacteria and petroleum-degrading bacteria.

3. The efficient oily sludge stockpiling process according to claim 2, characterized in that, The thermophilic bacteria are selected from the genus *Bacillus*; the petroleum-degrading bacteria are selected from one or more of the genus *Bacillus*, *Pseudomonas*, *Cladosporium*, or *Brucella*.

4. The efficient oily sludge stockpiling process according to claim 3, characterized in that, The mass ratio of the composite microbial agent to the volumetric mass of the oil sludge mixture is 2-5%.

5. The efficient oily sludge stockpiling process according to claim 1, characterized in that, The auxiliary materials are selected from one or more of poultry and livestock manure, plant straw or grain husks; the nutrient solution is animal manure leachate.

6. The efficient oily sludge stockpiling process according to claim 1, characterized in that, The moisture content of the mixture is 50-70%.

7. The efficient oily sludge stockpiling process according to claim 1, characterized in that, The microbial degradation treatment includes: continuously aerating and supplying oxygen to the reaction device, utilizing the microbial community in the oil sludge mixture for aerobic fermentation, and completing the microbial degradation process of the oily sludge.

8. The efficient oily sludge stockpiling process according to claim 7, characterized in that, The aeration rate during the aeration and oxygen supply process is 0.2–0.3 L / min / kg dry weight; The aerobic fermentation temperature is 50–70℃, and the cycle is 20–50 days.

9. The efficient oily sludge stockpiling process according to any one of claims 1 to 8, characterized in that, The reaction device includes a reactor, the interior of which is provided with a support plate with aperture. The bottom of the reactor is provided with an air inlet and a leachate outlet. The air inlet is connected to an air pump through an air inlet pipe. The air pump is used to aerate and supply oxygen to the oil sludge mixture. The leachate outlet is connected to a leachate outlet pipe. The leachate outlet pipe is used to discharge leachate containing oil sludge after microbial degradation.

10. The efficient oily sludge stockpiling process according to claim 9, characterized in that, The reactor has two holes at the top for inserting a thermometer and collecting gas; a flow controller is installed on the air inlet pipe between the air inlet and the air pump to regulate the aeration rate; the support plate is covered with nylon mesh to prevent oil sludge particles from clogging the air holes.

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