87results about "Fixation/solidifcation sludge treatment" patented technology

The invention provides a biochar repairing agent for marine sediments and a preparation method of the biochar repairing agent, and belongs to the technical field of repairing agents. The preparation method comprises the following steps: carbonizing straws, modifying by phosphoric acid and concentrated nitric acid, depositing ferroferric oxide-titanium dioxide, loading UiO-66-(COOH) 2 on the surface, coupling cyclodextrin-MOF and chitosan, crosslinking, performing magnet separation, washing and drying to obtain the biochar repairing agent for the marine sediments. The biochar repairing agent for the marine sediments prepared by the invention has a relatively large specific surface area and a plurality of coordination groups, can better fix heavy metal ions in the marine sediments, also has a photocatalytic degradation effect on organic pollutants, and is good in mechanical strength, easy to store and transport, safe, environment-friendly and easy to separate; wide application prospects are realized.

The invention discloses a solid-waste-based dredged sludge high-strength curing agent, a preparation method and application, and relates to the technical field of dredged sludge curing utilization, the solid-waste-based dredged sludge high-strength curing agent comprises 5-30% of coal gangue micro powder, 10-70% of slag micro powder, 5-20% of red mud micro powder, 5-25% of desulfurized gypsum micro powder, 3-30% of an activator, and 1-15% of an inorganic reinforcing agent. The curing agent is low in cost and wide in application prospect, solid waste resource utilization can be achieved, a new green sustainable development mode is constructed, the activity of the solid waste and dredged sludge is improved by adding the activating agent, curing of the dredged sludge is accelerated, and the strength of a cured body is improved by adding the inorganic reinforcing agent.

The application discloses an environment-friendly and efficient solidification and stabilization agent for calcium fluoride sludge and a preparation method thereof, and comprises the following raw materials in parts by weight: a chemical stabilization agent 20-30 parts, an inorganic solidification agent 60-70 parts, a microwave dehydration aid 1-5 parts and a pH regulator 2-5 parts. The application has the advantages of good treatment effect, solves the problems that the existing calcium fluoride sludge treatment agent has poor treatment effect on calcium fluoride sludge in the preparation process, harmful substances and pollutants in the calcium fluoride sludge are easy to penetrate into underground water or soil, environmental pollution is caused, and the treated sludge cannot reach the environmental protection standard and is disposed or utilized, which leads to the problems of re-releasing harmful substances in the use process and forming secondary pollution.

The application provides a kind of slurry shield mud high-efficiency green zero-discharge construction method, relating to slurry shield technology field, and the construction method includes slurry bucket groove construction, high-quality mud mixing, slurry separation treatment, new slurry preparation, slurry emergency treatment, by screening treatment to waste mud, solid particles in mud can be separated, treated mud can be recycled, effectively avoiding the generation of waste mud; geotextile tube can handle waste mud when slurry treatment equipment fails or runs overload, when shield machine passes through risk source, ensure continuous tunneling of shield machine and rapid passing, improve the reliability of shield; by adopting assembled bucket groove structure, construction is convenient and material can be reused, avoiding the risk of slurry leakage; the application realizes efficient continuous uninterrupted tunneling of slurry shield in complex environment by combining module bucket groove structure + slurry green treatment process + geotextile tube treatment.

The application discloses a multi-cutter-plate rotary grouting stirring head, which comprises a support, the top end of the support is connected with a link plate, the link plate is connected with a link rod, one side wall of the support is connected with a driving mechanism, and the other side wall of the support is provided with a grout conveying mechanism; the input pipe conveys grout, the hydraulic pipe provides power for a hydraulic motor, the hydraulic motor drives a rotating shaft to rotate, the rotating shaft is connected with an in-shaft grout conveying pipe and forms an integrated whole, thus, the in-shaft grout conveying pipe rotates synchronously, the input pipe inputs the solidified grout into the in-shaft grout conveying pipe through a universal grout conveyor, and then the solidified grout is output into a bottom pipe through an outlet hole, so that the effect of spraying the solidified grout is realized; meanwhile, the rotating shaft drives the cutter plate body to rotate, the cutter plate body drives the cutter blades to cut and tumble the sludge, the sludge can be simultaneously input with the solidified grout and cut and stirred, the mixing effect of the solidified grout and the sludge is enhanced, and thus the solidification effect of the sludge is indirectly improved.

The invention relates to the technical field of sludge purification treatment, in particular to an efficient sludge drying treatment device based on a fluidized bed and rotary suspension, which comprises a shell, a drying support unit is obliquely arranged in the shell, the drying support unit comprises a main mounting plate, a plurality of groups of drying units are movably mounted in the main mounting plate, and a plurality of groups of drying units are movably mounted in the main mounting plate. A total feeding port is formed in the shell, a total discharging port is formed in a port of one end, far away from the total feeding port, of the shell, a plurality of component feeding ports with the same number as the drying units are formed in the total feeding port, during working, even if one or more groups of drying barrels break down or need to be maintained, the drying work is not affected, and the drying efficiency is improved. The height of the end, close to the drying feeding port, of the discharging channel is larger than that of the other end of the discharging channel, the width of the end, close to the drying channel, of the discharging channel is larger than that of the other end of the discharging channel, and therefore sludge can be automatically and flatly laid, heat is evenly collected, mutual accumulation is avoided, and the drying effect is improved while the continuity is improved.

The PFAS capturing system 10 comprises a structuring reactor 20 including a reaction tank 21 and a pressurized floating separation apparatus 30 including a circulation device 40, wherein into a contaminated water with a PFAS-containing aqueous mixture stored in the reaction tank 21 of the structuring reactor 20, structural agents 1 and 2 are fed from the feeding section 22, the structural agent 1 is including a water-soluble cationic polymeric flocculant (A) capable of forming a high order structure containing high molecular weight carbon chains as a main structural agent, the structural agent 2 is including a water-soluble cationic polymer flocculant (B) as a main structural agent with a smaller cationic value than the water-soluble cationic polymer flocculant (A) which contains a positive charge and has a higher cationic value than the water-soluble cationic polymeric flocculant (A), which including at least one of an inorganic agent containing polyiron, ferric chloride, ferrous sulfate, ferric sulfate, polyaluminum chloride, sulfate band, and zinc chloride. By feeding the structural agent 1, a structure 1 is formed in contaminated water, and PFAS with anionic properties are adsorbed on the structure 1, and further, on the PFAS adsorbed on the structure 1, made of iron cation, aluminum cation etc., with hydrophobic carbon chains is formed by the structural agent 2, PFAS is held stably in a sandwich-like state between the structure 1 and the structure 2 so that it can be separated from the water. The PFAS is then formed in a pressure floating separation tank 32 of the pressurized floating separation apparatus 30, where a jet of pressurized ultrafine bubble containing water is formed in the contaminated water, and the contaminated water is circulated in the tank 32, and the structure 1 and the captured PFAS are made to float by the ultrafine bubbles and taken out as flotation scum, and the rest is made into PFAS reduced water, thus enabling the separation and capture of 30% or more of PFAS that are difficult to capture in the contaminated water.

The invention discloses a material treatment method for synchronously recycling acid and iron ions in acid mud, belongs to the technical field of solid waste treatment, and is used for solving the technical problem that in the prior art, acid and iron ions in acid mud are difficult to efficiently separate and recycle. The recycled iron oxide is obtained. The method comprises the following steps: synthesizing a cationic flocculant and pretreated silica fume, adding the pretreated silica fume and the cationic flocculant into acid mud diluted slurry to coagulate and settle impurities and metal ions, carrying out suction filtration to obtain filtrate and fluorine-containing silicon filter residues, and carrying out extraction and reverse extraction on the filtrate by using an organic extraction agent to realize efficient separation of acid and metal ions. The method comprises the following steps: recycling acid sludge to obtain recycled acid liquor, adjusting the pH value, carrying out fractional precipitation and calcining metal ions to prepare high-purity recycled iron oxide, and realizing synergistic and efficient recycling of acid and iron ions in the acid sludge.

The invention discloses a curing method for inhibiting drying shrinkage cracking of cured sludge, and belongs to the technical field of crack prevention of cured sludge in geotechnical engineering. The artificial fine aggregate for inhibiting the cured sludge from drying shrinkage cracking is prepared from the following raw materials in parts by mass: 60 to 70 parts of gypsum powder, 20 to 30 parts of blast furnace slag, 2 to 10 parts of calcium carbide dust, 4 to 8 parts of cement and 0.5 to 1 part of sodium dodecyl benzene sulfonate. After the artificial fine aggregate disclosed by the invention is mixed into sludge, not only can the grading of the sludge be improved, but also the curing hydration reaction can be promoted to be continuously carried out by adsorbing free water through the porous structure, so that the dry shrinkage deformation of the cured sludge is compensated, and the dry shrinkage cracking resistance and the anti-seepage performance of the cured sludge can be improved. According to the invention, the artificial fine aggregate is prepared from a large mixing amount of industrial waste residue, and is mixed into the sludge to be cured, and the dry shrinkage deformation of the cured sludge is inhibited through grading improvement, free water adsorption, self volume expansibility and strength increase.

The present application relates to the field of sludge treatment, in particular to an environment-friendly sludge treatment equipment. The equipment comprises a sludge suction pump and a dehydration mechanism connected with the sludge suction pump. The dehydration mechanism comprises a treatment box and a pipeline. A rotating screen cylinder is arranged in the pipeline. The dehydration mechanism further comprises a filter pressing assembly and a disturbance assembly arranged in the treatment box in sequence from top to bottom. A linkage is arranged between the filter pressing assembly and the disturbance assembly. A medicament nozzle for spraying a solidifying agent is arranged on the treatment box opposite to the disturbance assembly. A discharge passage is arranged on the treatment box below the disturbance assembly. The present application realizes efficient dehydration of sludge and formation of sludge cake through the synchronous operation of the conveying belt and the pressure belt and the pressure roller. The linkage drives the disturbance assembly to uniformly disturb the sludge cake, which improves the mixing effect of the solidifying agent, thereby completing the continuous operation of dehydration and stabilization treatment.

The present invention relates to a method for combined recovery of phosphate and nitrogen from sewage sludge. The core objective of the present invention is to recover phosphorus from sewage sludge ash and convert phosphorus into NP fertilizer diammonium phosphate using steam from sewage sludge drying and nitrogen from liquid manure.

The invention discloses a sludge homogenization treatment system and a treatment method, which are applied to the field of sludge solidification technical engineering, the sludge homogenization treatment system comprises a vibration filtering device, a stirring device, a water adding adjusting device, sensors and a central controller, the sensors comprise a density sensor, a weight sensor and a flow sensor; impurities and large particles in the sludge can be screened out through the vibration filtering device, so that the sludge becomes uniform; the weight, the concentration and the water adding amount of the sludge can be monitored through the sensor, and the concentration of the sludge is controlled within the design range through the stirring device; the central controller is used for collecting and analyzing sensor data and controlling the vibration filtering device and the stirring equipment, so that the automation degree is high, the stirring efficiency is high, the sludge homogenizing effect is good, the use amount of curing materials is reduced, and the sludge curing effect is improved.

The present application relates to the field of dredging treatment, and discloses a sludge screening integrated treatment equipment and a treatment method. In the present application, movable support rods are welded between the outer surfaces of a filter pressing main body, a plurality of filter plates are movably connected between the upper surfaces of the movable support rods, filter frames are movably connected between the upper surfaces of the movable support rods corresponding to each filter plate, a hydraulic machine is fixedly connected between the outer surfaces of the filter pressing main body away from the filter plates, a sludge filling pipe is arranged on the outer surface of the upper side of the filter plate, a filtrate pipe is arranged on the outer surface of the filter plate corresponding to the hydraulic machine, and a guide-out pipe is fixedly connected to the outer surface of one side of a liquid collecting box. In use, the filter plate and the filter frame jointly constitute a group of filter chambers, the hydraulic machine cooperates with filter cloth to jointly form a filter pressing device main body through extrusion, the sludge residue is introduced into the sludge filling pipe until the filter chamber is filled, the filtrate passes through the filter cloth and the filter plate, the filtered tail water is filtered out through the filtrate pipe and then dripped into the liquid collecting box to be discharged from the guide-out pipe, and the sludge treated by the filter chamber is pressed into dry soil.

The invention relates to the technical field of sludge treatment, in particular to a pretreatment process for improving the compatibility of river and lake sludge in saline-alkali soil, the river and lake sludge is pretreated through salt leaching and alkali reduction, structure solidification and nutrient activation, and finally the river and lake sludge with good compatibility with the saline-alkali soil is obtained. The physical desalting effect is achieved through washing in the salt leaching and alkali reduction process, and then citric acid and an acidity regulator are used for further treatment to achieve chemical alkali breaking; in the structure curing process, the sludge is deodorized through the sludge modifier, the water-retaining property and the air permeability are improved, and the sludge has a relatively stable internal structure; in the nutrient activation process, various saline-alkaline tolerant microorganisms are adopted to further decompose organic matters in the sludge, so that the fertility of the sludge is improved, harmful bacteria in the sludge are eliminated, the pretreated sludge is rich in various beneficial microorganisms and sufficient in nutrient, the compatibility with the saline-alkaline land is further enhanced, and the application prospect is wide.

The invention discloses ecological breeding excrement treatment equipment which is characterized in that the ecological breeding excrement treatment equipment comprises a fixed base, a group of supporting seats are arranged at the top of the fixed base, a dry-wet separation mechanism is arranged on the supporting seats, a supporting frame is installed on one side of the fixed base, and a conveying pipeline is installed at the top of the supporting frame; the conveying pipeline is used for conveying materials into a feeding hopper at the top of the dry-wet separation mechanism, a set of fixing frames are arranged on the outer side of the supporting frame, a conveying rail frame is installed on the fixing frames and comprises a set of guide rail frames, and connecting covers are arranged outside the guide rail frames. The device has the advantages that the conditions of easy blockage, frequent manual intervention and uneven output can be solved, the separation hopper is used for crushing and homogenizing materials, the visual sensor can feed back according to actual conditions, high-quality solid granulated fertilizer with reduced moisture and uniform granularity can be produced, the operation cost is remarkably reduced, and the device has good practicability and economical efficiency.

The present application relates to the technical field of sludge treatment, and discloses a mobile modular sludge treatment integrated device, which comprises a sludge feeding module, one side of the sludge feeding module is connected with a concentration control module, the sludge feeding module comprises a feeding box, one end of the top of the feeding box is fixedly provided with a fixed filter plate, and one end of the bottom of the feeding box is provided with a feeding groove, the lifting frame at one end of the outer wall of the positioning lead screw is driven to lift the lifting frame, the lifting frame and the lifting filter plate, the sludge concentration in the sewage is kept low, the sewage is conveyed to the water treatment module through the first discharge pipe, the sewage is treated through the water treatment module, and the sludge with different concentrations is quickly pretreated before dehydration, so that the sludge concentration input into the dehydration and solidification module is facilitated to be controlled, the dehydration efficiency is improved, and the sewage with low concentration is directly treated, so that the hidden danger problem of resource waste in sludge treatment is reduced.

The invention discloses a waste acid purification mud cake resourceful treatment system and process, and the waste acid purification mud cake resourceful treatment system comprises a material crushing system used for crushing waste acid purification mud cakes; the pulping system is used for mixing the crushed waste acid purification mud cake with liquid to prepare uniform slurry; the slurry adjusting system is connected with an outlet of the slurry making system and is used for receiving slurry and adding an adjusting agent to improve the physical and chemical properties of the slurry; the loose filtering system is connected with an outlet of the slurry adjusting system and is used for performing low-pressure filtering on the adjusted slurry to form loose accumulated sludge particles; the purifying and washing system is connected with an outlet of the loosening and filtering system and is used for washing the loosely accumulated sludge particles to remove chloride ions; the sludge solidifying and dewatering system is connected with an outlet of the purifying and washing system and is used for extruding, dewatering and forming the purified sludge to prepare iron-making raw material blocks; by means of the technological process, harmless treatment and resource recycling are achieved.

The application discloses a kind of high-wrapping solidified silt and preparation method thereof, it is related to soil solidification technical field.The application utilizes solidified agent to solidify silt, can realize the efficient solidification effect of silt, obtain the silt solidification product with excellent mechanical property.The solidified agent of the application includes solid waste cementitious component and organic reinforcing component, wherein, solid waste cementitious component includes carbide slag, gypsum and mineral powder with mass ratio of 13-17:13-17:66-74, organic reinforcing component includes xanthan gum and casein with mass ratio of 1:0.8-1.2, and the mass ratio of solid waste cementitious component and organic reinforcing component is 7:2.5-3.5.The application solves the problems of high water content, low strength and poor stability of dredged silt through the organic synergistic effect of the composite cementing system of carbide slag, gypsum and mineral powder and xanthan gum, casein, realizes the efficient solidification and resource utilization of dredged silt, and promotes the development of low-carbon engineering materials.

Provided are a molding material that includes a biomass material and can be heated during molding at a higher temperature than molding materials of the related art, a molded article, and a method for manufacturing a molding material. The molding material according to the present embodiment includes, as a biomass material obtained from a water-containing organic matter, a biomass material having a moisture content of 20% or less, a bacterial count of mesophilic aerobic bacteria of 105 / g or less, and a maximum exothermic peak by a differential thermal analysis method of 300°C or higher. As described above, the molding material includes a biomass material having a temperature of a maximum exothermic peak detected by the differential thermal analysis method higher than that of biomass materials of the related art, and therefore can be heated during molding at a higher temperature than molding materials of the related art.

Liquid suspensions are disclosed that include superabsorbent polymer suspended within a non-aqueous liquid. The liquid suspensions are capable of being pumped and sprayed onto waste fluids for clean-up procedures. The liquid suspensions can be made by high shear mixing of the superabsorbent polymer with the non-aqueous liquid until the superabsorbent polymer is suspended within the non-aqueous liquid.

The invention relates to the technical field of sludge curing agents, in particular to a sludge curing agent synergistically excited by utilizing multi-source industrial solid waste, which comprises the following components: modified multi-source industrial solid waste, a synergistic exciting agent, an auxiliary curing agent and a modifier, according to the invention, the modified multi-source industrial solid waste, the synergistic activator, the auxiliary curing agent and the modifier are combined according to a scientific ratio, and through a preparation process of step-by-step stirring and mixing, all the components are ensured to be uniformly dispersed and fully contacted. On the whole, the modified multi-source industrial solid waste serves as a core base material, and sufficient active ingredients and framework support are provided; the reaction process is accurately regulated and controlled by the synergistic excitant, and the activity of the substrate is maximally excited; the auxiliary curing agent and the modifier are supplemented and improved from the aspects of structure filling, interface optimization, performance strengthening and the like. According to the technical scheme of multi-component cooperation, high-value utilization of multi-source industrial solid waste is achieved, and environmental pressure caused by industrial solid waste stacking and traditional curing agent production is reduced.

This invention relates to a method for disposing of backwash sludge from underground water treatment plants. It primarily addresses the problem of increased treatment costs and resource waste associated with existing methods of reusing large amounts of sludge generated during wastewater recovery at underground water treatment plants. The disposal method mainly includes the following steps: Step 1, solidifying the sludge; Step 2, adding the solidified sludge to a polyaluminum chloride product, followed by pressure filtration and sedimentation to obtain a compound product. This method for disposing of backwash sludge from underground water treatment plants can prepare a composite coagulant from the waste generated during production, which can then be reused in the coagulation and sedimentation process of domestic sewage treatment, saving resources and treatment costs.

The invention relates to the technical field of oil field sludge treatment, in particular to oil-containing sludge particles and an oil-containing sludge resource reutilization method. The preparation method comprises the following steps: mixing raw materials and granulating to obtain oily sludge particles, wherein the raw materials comprise the following components in percentage by mass: 36-40% of oily sludge, 45-50% of briquette coal, 3-7% of a curing agent and 3-7% of a composite additive; the curing agent is ordinary Portland cement or slag Portland cement; the composite additive comprises a sulfur-fixing agent, a combustion improver and a binder. According to the invention, through accurate proportioning and granulation, the problems of difficult conveying, non-uniform combustion and coking caused by high viscosity and high water content of the oily sludge are thoroughly solved, so that the combustion efficiency is effectively improved; the generation and migration risks of pollutants such as acid gas and heavy metal are controlled in advance, and when blending combustion is carried out in the fluidized bed boiler, flue gas emission is superior to the national standard; the resource reutilization of the oily sludge is effectively realized.

The application discloses a kind of biological induction solidification flow plastic soil preparation methods, comprising the following steps: step one, citric acid is added to high water content flow plastic soil in pumping process, stirring is carried out in incorporation process, and it is stationary after stirring;Step two, when the water content in flow plastic soil is higher than the liquid limit of soil body, first polyacrylamide is added to flow plastic soil, is fully stirred, and it is stationary after stirring Precipitation, the upper water of flow plastic soil is pumped away, and then mechanical pressure filtration dewatering is carried out;Step three, the mechanical pressure filtration dewatering mud cake is scattered using blade, and nutrient salt is added, and is fully mixed, and mixing is not less than 10min;Step four, microbial solidification agent is uniformly mixed into the mud soil body, and is cured until the soil body solidification.The application can solve the problems of high disposal cost and great utilization difficulty of current engineering flow plastic soil by using the above-mentioned biological induction solidification flow plastic soil preparation method, and is suitable for the solidification and engineering in-situ recycling of flow plastic soil.

The invention discloses a method for solidifying chromium-containing sludge based on coal gasification coarse slag, which comprises the following steps: fully drying the coal gasification coarse slag and the chromium-containing sludge, grinding and mixing according to a weight ratio of 1: (1-5), and calcining at high temperature in an air atmosphere. After calcination treatment, heavy metal chromium in the sludge is fixed and converted into a stable uvarovite microcrystalline phase, and meanwhile, the addition of the coal gasification coarse slag also inhibits the oxidation of Cr (III), so that the problem of formation of Cr (VI) which is high in toxicity, easy to migrate and carcinogenic and teratogenic in a sludge sintering product is solved. The method has the multiple technical advantages of large solid waste treatment capacity, no chemical reagent consumption, low treatment cost and excellent treatment effect. According to the leaching result of the solid waste leaching toxicity leaching method-acetic acid buffer solution method (HJ / T HJ / 300-2007), the requirements of the national standard of hazardous waste identification standard-leaching toxicity identification (GB5085.3-2007) are met, that is, the concentration of Cr (VI) is lower than 5 mg / L, the concentration of total chromium is lower than 15 mg / L, and waste treatment with waste and waste recycling are achieved.

The present application belongs to the technical field of ecological remediation of heavy metals in bottom mud, and discloses a device for heavy metal precipitation and solidification test of river and lake bottom mud, which comprises a test tank body, a power supply, a pressing plate, a backwater tank body and an EKG drainage plate, the inner side of the test tank body is provided with a filter screen and a geotextile, the pressing plate and the backwater tank body are provided with EKG plate hole grooves, the EKG drainage plate comprises a cathode and an anode, the EKG drainage plate is provided with a liquid inlet, the test tank body is connected with a water outlet pump and a liquid storage tank, the water outlet pump is connected with a water outlet pipe, the liquid storage tank is communicated with a liquid guide pipe and a liquid inlet pump, and the liquid inlet pump is connected with a liquid inlet pipe; the present application realizes the precipitation and solidification of heavy metals in bottom mud and the continuous drainage of bottom mud by electro-osmosis combined with pre-pressing and heavy metal chelating agents, shortens the precipitation period of heavy metal pollutants and the solidification period of bottom mud, and realizes the efficient precipitation and solidification of heavy metal pollutants in river and lake bottom mud.

A method for producing organomineral fertilizer is disclosed. A system for producing organomineral fertilizer is further disclosed.

The present application belongs to the technical field of soil engineering sludge solidification, and particularly relates to a vacuum electro-osmotic solidification and contaminated sediment repair integrated test system and method; the present application can monitor the change of the water content and the conductivity of the contaminated sediment in the electro-osmosis treatment process in real time, and can calculate the change of the pollution concentration of the contaminated sediment in real time according to the change of the water content and the conductivity, thereby solving the problems that the traditional test method needs sampling detection, the steps are complicated and the result cannot be obtained in real time, and the pollution concentration and the water content do not need to be measured by special equipment, thereby saving the cost; the pollutants in the contaminated sediment are discharged into the water collecting assembly with the sewage, thereby ensuring the decontamination effect; the contaminated sediment in the sludge inlet assembly is sucked into the vacuum container through the negative pressure assembly, thereby ensuring the uniformity of the contaminated sediment; with the test proceeding, the vacuum container compresses the contaminated sediment, thereby accelerating the vacuum electro-osmosis dewatering and decontamination process.

The application discloses a kind of petroleum sludge terminal disposal method, it is related to petroleum sludge processing technical field.The present application comprises the following steps: S1.pretreatment of petroleum sludge deoiling: using 6% to 12% sodium gluconate, trisodium citrate or L-arginine, petroleum sludge is deoiled pretreatment;S2.washing oil sewage electrochemical treatment: with Fe3O4, Fe-C, Al-Fe nanometer material as catalyst, through electrolytic process, the organic matter in the oily sewage produced in S1 processing process is decomposed;S3.deoiled sludge solidification / stabilization treatment.The present application first washes petroleum sludge with chemical agent, after liquid-solid separation, liquid is electrochemically degraded;The separated solid sludge is solidified with magnesium oxychloride cement, and products such as road bricks are formed, solid waste coal gangue and fly ash are used as admixture in this process, water glass solution is used instead of water, and magnesium oxychloride cement with fast solidification and good air hardening is used as solidifying agent, so that the green management of petroleum sludge is realized.

The application provides a phosphorus fixation agent, a preparation method and a sludge treatment method, and comprises the following steps: providing a polymeric ferric salt solution and a calcium solution respectively; adding the polymeric ferric salt solution into the calcium solution for reaction to obtain a mixed solution; performing solid-liquid separation on the mixed solution to obtain a filtrate and a filter residue; and sequentially performing drying and crushing treatment on the filter residue to obtain the phosphorus fixation agent; wherein the calcium solution contains Ca 2+ ; and the mass ratio of iron in the polymeric ferric salt solution to calcium in the calcium solution is 1:(2.5-7.4). The preparation method is simple and convenient to operate, realizes a passivation effect of reducing a phosphorus diffusion flux by more than 68%, and has engineering application potential.