87results about How to "Solve disposal problems" patented technology

The invention relates to the technical field of harmlessness treatment of smelting wastes, and especially relates to a ceramsite prepared by using smelting wastes, and a preparation method thereof. The ceramsite comprises 10-90% of smelting waste powder, 5-40% of municipal sludge, 4-20% of fly ash, 0-20% of gangue and 0.1-10% of a curing agent. The preparation method of the ceramsite comprises the following steps: 1, crushing the smelting wastes by using a crusher to prepare the smelting waste powder; 2, weighing the smelting waste powder, the municipal sludge, the fly ash, gangue and the curing agent, mixing, and uniformly stirring to prepare ceramsite powder; 3, conveying the ceramsite powder to a ball forming granulation machine, and carrying out granulation molding to prepare ceramsite balls; 4, drying the ceramsite balls; and 5, calcining he dried ceramsite balls to prepare the finished ceramsite. The ceramsite prepared in the invention has the advantages of light weight, environmental protection and wide uses; and the preparation method recycles the smelting wastes, and has good economic and social benefits.

The invention belongs to the field of treatment and disposal of industrial waste salt, and particularly discloses a harmless treatment method of industrial waste salt containing organic matter. The harmless treatment method comprises the steps that firstly, the waste salt is dried to remove water and the low-boiling-point organic matter in the waste salt, the dried salt is crushed and sieved to the required particle size, and then fed into pyrolysis equipment, the organic matter in the salt is heated to be decomposed into a gas phase, the organic matter and fine salt particles are together discharged into a cyclone separator along with airflow, the particles and gas are separated to recover salt powder, and organic exhaust gas enters an exhaust gas treatment device to be treated and then discharged after reaching the standard. The water and the organic matter in the waste salt are fully removed through drying, crushing, sieving and fluidized bed pyrolysis technologies, the organic exhaust gas generated in the treatment process is subjected to standard treatment, finally, dry salt powder which is low in impurity content and meets product quality requirements is obtained, and can befurther recycled.

The invention discloses a solidification treatment method for sludge of urban sewage plants. The method comprises the following steps of (1) adding curing agent consisting of lime, sulfate aluminum cement, portland cement and fly ash in dehydrated sludge based on the weight of the dehydrated sludge, wherein the weight percentage of lime, sulfate aluminum cement, portland cement and fly ash in the curing agent are as follows: 1.2-1.9% of lime, 3.0-6.1% of sulfate aluminum cement, 3.0-3.7% of portland cement and 4.7-6.0% of fly ash; and (2) mixing the sludge added with the curing agent to form precursors of solidified blocks, piling the precursors up according to a height of 7 cm, and covering with waterproof membrane, maintaining the precursors for three days with a dry maintaining method, and forming sludge solidified blocks. The method provided by the invention has the advantages of efficiency, low cost, simple operation and the like.

The invention discloses a process method and a process system for preparing solid fuel through biomass and sludge. The method comprises the step of mixing biomass dried raw materials with sludge dried raw materials which are aired, ground and dried to obtain the solid fuel, wherein sludge airing energy is one or the combination of any two or three of solar energy, waste gas generated by drying sludge raw materials and high-temperature fume generated by combusting the solid fuel, and sludge raw material drying energy is high-temperature and high-pressure steam generated by combusting the solid fuel. The system comprises a raw material treatment system, a molding system and a boiler system, wherein the raw material treatment system and the boiler system transfer heat energy to each other through first, second and third gas delivery pipelines. According to the method, the cost is low, the effect is good, environmental protection is realized and the solid fuel is suitable for large-scale production. The system is resource-saving and stable to operate.

The invention discloses a method for preparing solid forming fuel with pig manure as raw material. The method comprises the steps as follows: firstly, drying the pig manure to enable the moisture content of the pig manure to be reduced to 10%-25%, then crushing the pig manure and adding the additive capable of desulfuration, deodorization and mold prevention via 2%-5% dry basis quality of the pig manure so as to form the dried pig manure raw material; uniformly mixing and stirring 20%-100% of the dried pig manure raw material, 0%-80% of biomass and 0%-20% of coal by dry weight to obtain the raw material mixture, and then utilizing forming machine to perform hot-pressing formation, so as to obtain the solid forming fuel. The method has the characteristics of simplicity, convenience, feasibility, energy conservation and environmental protection, high treatment efficiency, low production cost, and high convenience for large-scale industrialized production, and the solid forming fuel has no odor, is not easy to mildew, is convenient in transportation and storage and high in combustion efficiency and has fewer secondary pollutant emissions. Therefore, harmless treatment and resource utilization of the pig manure are realized, and the problem about treatment and disposal of the excessive pig manure can be effectively solved.

The invention relates to a desulfurization wastewater zero discharge device. In the prior art, desulfurization wastewater is discharged after being purified. The desulfurization wastewater zero discharge device provided by the invention consists of a desulfurization system, a two-section wastewater cyclone, an ultrasonic atomization nozzle, a dust remover, a wastewater pump and a wastewater delivery pump, wherein the two-section wastewater cyclone comprises a cyclone body, an overflow pipe and a filtering net; an inlet and an underflow orifice of the cyclone are connected with the desulfurization system; an overflow port is connected with the ultrasonic atomization nozzle; an inlet flue is arranged on the dust remover; the ultrasonic atomization nozzle is communicated with the inlet flue on the dust remover; the dust remover is connected with the desulfurization system. The desulfurization wastewater zero discharge device disclosed by the invention is reasonable in structural design, wastewater drainage is avoided, water resources are saved, the space and cost are also saved, and inorganic salt ions and heavy metal ions in the wastewater can be effectively removed.

The invention belongs to the field of sludge treatment, and particularly relates to a device and a method for treating sludge through earthworm cultivation. An earthworm cultivation device comprises abracket, a plurality of transporting and cultivating units, a feeding end and a discharging end; the plurality of transporting and cultivating units are arranged on the bracket at up-and-down intervals; the feeding end and the discharging end are arranged at the left side end and the right side end of the transporting and cultivating units correspondingly; each transporting and cultivating unit comprises a supporting net, chains, a gear and a motor; the supporting net is used for placing sludge and annularly closed in the left-and-right direction; the chains are arranged at the front end andthe back end of the supporting net and used for driving the supporting net to move; the gear is used for driving the chains to move; the motor is used for driving the gear; a supporting frame is arranged at the feeding end; a foldable transporting plate corresponding to each transporting and cultivating unit is arranged on the supporting frame. Compared with the existing equipment, the earthworm cultivation device adopts automation, is simple in structure, easy to operate and low in manpower demand, and greatly reduces labor cost. Moreover, the occupied area is reduced, the earthworm cultivation efficiency can be effectively improved, the cultivation time is shortened, the yield of the earthworms is increased, energy consumption is reduced and the cultivation cost is reduced.

The invention relates to a method for accelerating enzymolysis saccharifying of lignocellulose by utilizing sludge protein as an enzymolysis accessory ingredient. The method comprises the following steps: crushing, screening and soaking lignocellulose biomass and separating lignocellulose biomass powder; taking municipal sludge and adjusting pH value to 9-12; performing ultrasonic treatment and then cooling to room temperature; separating supernate and drying, thereby acquiring the sludge protein powder; adding citric acid-sodium citrate buffer solution into the lignocellulose biomass powder and uniformly mixing, thereby acquiring a mixed solution; adding cellulase and sludge protein powder into the mixed solution, thereby acquiring enzymatic hydrolysate; and performing enzymatic hydrolysis reaction for 25-48h at 35-50 DEG C, thereby completing the enzymolysis saccharifying of the lignocellulose by utilizing the sludge protein as the enzymolysis accessory ingredient. According to the method provided by the invention, the sludge protein is used as the enzymolysis accessory ingredient; the non-specificity absorption of the lignocelluloses to cellulase is reduced; the dosage of the cellulase is saved; the enzymolysis saccharifying of the lignocelluloses is enhanced; the resource utilization of the sludge is realized; the efficiency is higher.

The invention discloses a device and a method for coupling micro-alkaline and micro-aerated anaerobic fermentation of sludge with SBR nitrogen and phosphorus removal and sludge reduction, and belongsto the field of low-C/N urban sewage treatment and sludge reduction. The method comprises the following steps: pumping the residual sludge into an anaerobic fermentation micro-alkali micro-aeration device for anaerobic fermentation of sludge to extract an internal carbon source; meanwhile, forming struvite precipitates by NH4<+>-N and PO4<3->-P generated during fermentation and Ca<2+> to remove NH4<+>-N and PO4<3->-P in a fermentation product so as to purify the fermentation product; performing sludge-water separation on the fermentation product in a secondary precipitation tank; pumping supernatant into a fermentation liquid tank; mixing and pumping the fermentation liquid and domestic sewage into an SBR nitrogen and phosphorus removal device. According to the invention, the anaerobic fermentation of sludge is performed under micro-alkali micro-aeration conditions to extract the internal carbon source; the fermentation product is used as an external carbon source; the SBR nitrogen andphosphorus removal device is used to realize deep nitrogen and phosphorus removal of low-C/N urban sewage; the residual sludge of the SBR nitrogen and phosphorus removal device is used in the anaerobic fermentation micro-alkali micro-aeration device to achieve a purpose of sludge reduction while reducing treatment cost of the residual sludge.

The invention provides a preparation method of sludge ceramsite used for medium and low concentration ammonia nitrogen wastewater treatment. The preparation method comprises the following steps: immersing fly ash in a 3-6% NaOH solution at 20-30DEG C for 3-4d, washing the immersed fly ash with deionized water, and drying the washed fly ash at 100-110DEG C; drying excess sludge and clay at 100-110DEG C; drying above three raw materials, crushing the dried three raw materials, and sieving the crushed three raw materials for later use; fully mixing, by mass, 30-60% of the preprocessed fly ash, 30-60% of the preprocessed excess sludge and 10% of the preprocessed clay to obtain a dry material; adding a proper amount of deionized water to the dry material, uniformly stirring to prepare a 1-3mm blank, placing the blank in a tray, and drying the tray in a 110DEG C oven until the surface of the blank has no water; putting the dried blank in a muffle furnace, heating the blank to 350-500DEG C, preheating the blank for 10-40min, heating the blank to 800-1100DEG C, sintering the blank for 10-25min, cooling the obtained product in the furnace to 180-200DEG C, and taking out the cooled product to obtain the sludge ceramsite. The sludge ceramsite prepared in the invention has the advantages of low price, economical property, high efficiency, environmental protection, and suitableness for treatment of medium and low concentration ammonia nitrogen wastewaters.

The invention discloses a heat pump coupled adsorption type closed system for drying sludge. The structure of the system comprises three closed loops, namely a heat pump system refrigeration working medium circulation loop, an adsorption system regenerated air circulation loop and an air circulation loop for drying sludge. The heat pump system refrigeration working medium circulation has the effects of dehumidifying and heating the air for drying sludge, so that the air continuously performs circulation of a sludge drying process, a dehumidifying process and a heating process. A heat pump system utilizes the recovered condensation heat to heat the air for drying sludge. An adsorption system adopts a fixed bed, rotating wheel or moving bed adsorption device to dehumidify the air for dryingsludge for the second time so as to enhance the efficiency of the sludge drying process, and utilizes regenerated air to perform desorption treatment on the adsorption device saturated with water, thereby realizing continuous and uninterrupted operation of the adsorption system. The adsorption system adopts a cooling mode to dehumidify the high-humidity regenerated air, and simultaneously utilizesthe waste heat of the heat pump system as a unique heat source for heating the dehumidified regenerated air, so that the regenerated air continuously performs circulation of an adsorption device desorption process, a dehumidifying process and a heating process. The device is of a fully-closed structure, and both the adsorption system regenerated air circulation loop and the air circulation loop for drying sludge do not discharge any gas.

The invention relates to a method for preparing biodiesel by floating slag from an in-situ esterification sewage treatment plant. The method comprises the following steps: performing pretreatment on the floating slag to get sludge after drying; adding methanol and a sulfuric acid solution into the sludge after drying, performing a stirring reaction at appropriate temperature and performing in-situ esterification; and reducing a mixed solution after in-situ esterification to room temperature, adding an n-hexane solution, and performing mixed reaction-centrifugation-abandonment of solids-recovery of supernatant fluid-extraction-filtration to get the biodiesel. According to the method disclosed by the invention, the biodiesel is prepared by taking the floating slag from an urban sewage treatment plant as a raw material for in-situ esterification, the problem of treatment and disposal of the floating slag from the sewage treatment plant can be solved, and the productivity of the biodiesel can be more than 20%, which can be improved by at least 100% in comparison with the productivity of the biodiesel prepared from the sludge.

The invention relates to a photo-Fenton-positive permeation integrated device for treating organic wastewater difficult to biodegrade and a using method of the device. The device comprises a photo-Fenton unit and an immersed positive permeation unit. The method for treating the water by using the device comprises the photo-Fenton process and the positive permeation process, and while organic pollutants are effectively degraded or converted by using the photo-Fenton unit, the organic pollutants which are not completely degraded or converted in the photo-Fenton process are permselectively intercepted by using a positive permeation membrane. The immersed positive permeation unit adopts an immersed positive permeation structure, a water inlet end circulating pump or an inlet water tank is notneeded, the overall structure is compact, the energy consumption is low, and the photo-Fenton-positive permeation integrated device is easily combined with other technologies or devices. Active substances generated by the photo-Fenton unit are used up in the pollutant degradation and converting process and in the positive permeation unit migration process, the strong oxidizing property of the photo-Fenton unit cannot affect the stability of the membrane, the wastewater treatment efficiency is high, the wastewater treatment effect is good, and the device is suitable for application and popularization.

The invention discloses an in-situ dewatering method for sludge of sewage treatment plants. The method comprises the steps of injecting sludge dewatering agents into sludge by using a high-pressure jet-grouting pile machine and mixing and stirring the agents with the sludge evenly; and treating the treated sludge by using a conventional vacuum preloading method. The method can overcome difficulties of treatment of large-area sludge stacked places, the sludge is not needed to be excavated and treated in another place, problems of secondary pollution of stink, sewage and the like produced in the excavation and transport process are solved, and the in-situ dewatering method has advantages of short treatment period, low cost and the like compared with treatment methods of burning, compost and the like.

The invention discloses a method for producing sintered straight-through water-conveying water-permeable bricks by utilizing lithium tailings and steel slag tailings. The method comprises the following steps: performing homogenization treatment on the lithium tailings and the steel slag tailings, putting the processed lithium tailings, the processed steel slag tailings, a clay raw material and water into a ball mill according to a certain ratio, performing mixing fine grinding, performing sieving to remove iron, putting the iron-removed material in a mud pool, performing filter pressing to form a mud cake, performing mud refining to extrude mud sections, performing extrusion molding on the mud sections to obtain wet green sintered water-permeable bricks with uniformly-distributed straight-through water-conveying holes of 5-10 mm, cutting the wet green bricks, putting the cut wet green bricks on supporting plates, sending the supporting plates to a tunnel kiln, and performing drying; and performing high-temperature sintering on dry green bricks according to a certain firing system at temperature of 1100-1200 DEG C in an energy-saving double-layer tunnel kiln to prepare the water-permeable bricks. The water-permeable bricks disclosed by the invention have a plurality of functions such as very good water permeability and hydrophobicity, no pollution, high strength, strong corrosion resistance, good freeze-thaw resistance, long service life, climate adjustment, elimination of an urban heat island effect, and maintaining of surface water circulation, and meet the requirements ofenergy conservation and emission reduction, environmental protection and development of low carbon economy in China.

The invention provides a method for degrading atrazine in water by activating potassium peroxymonosulfate through iron-aluminum mud. The method comprises the steps of adding naturally-aired, crushed, ground, sieved and uniformly mixed iron-aluminum mud into an atrazine solution in a certain solid-liquid ratio, and adding a certain concentration of potassium peroxymonosulfate, so as to remove atrazine. The method for degrading atrazine in water by activating potassium peroxymonosulfate through the iron-aluminum mud has the beneficial effects that the operation is simple, the degradation effect is good, the degradation efficiency can reach 95% or above, and meanwhile, the treatment problem of the iron-aluminum mud can be solved.