139 results about "Environmental technology" patented technology

The invention relates to the fields of environmental technology and the breeding and processing of microalgae, in particular to a method for producing feed additive from livestock and poultry breeding wastewater and purifying breeding wastewater to reclaimed water. The method is characterized by comprising the following steps that: wastewater enters an acidification adjusting tank through a grille, and the acidified wastewater enters an anaerobic biochemical reactor for treatment and then enters an aerobic biochemical reactor; after the aerobic biochemical treatment, the obtained biogas slurry enters a settling tank for settling, the supernatant enters a membrane bioreactor for further aerobic treatment and is filtered by an ultrafiltration membrane, the generated ultrafiltration clear liquid is sterilized and neutralized and then enters a photobioreactor, algae are added into the photobioreactor to perform microalgae cultivation, and the algae liquid is discharged from the photobioreactor and then enters a flocculation and settling tank; and after flocculation and settling, the supernatant is used for water recycling, the concentrated algae liquid at the bottom enters a filter, and the separated microalgae slurry enters a fermentation / enzymolysis pot (tank) to perform fermentation / enzymolysis to be used as the feed additive. The invention has the advantages of high economic adaptability, zero discharge and the like.

The invention provides a farmland soil heavy metal pollution restoration method through coupling activating and passivating, belonging to the technical field of environmental technology. According to a technical scheme adopted by the invention, the farmland soil heavy metal pollution restoration method comprises the following steps: a step I, planting heavy metal hyper-accumulation plant, applying a heavy metal activator into the soil, collecting plant which is enriched with heavy metals; a step II, applying a heavy metal passivator into the soil, planting and harvesting crops with heavy metal content reaching the safety standard. By two different coupling technologies in the two government stages, on one hand, the concentration of heavy metals in the farmland soil is lowered with high efficiency, on the other hand, the farmland can be put into safety production as early as possible, so that the heavy metal pollution farmland soil restoration efficiency is improved generally, and the method can be applied to farmland soil with large-area heavy metal pollution.

A concentrated opposite blowing multiple classification NOx combustion method of the protection environmental technology area. The invention is that along the furnace height direction fall into the main combustion chamber, reducing area and burnout area, in the main area the wind fall into two shades in a level direction by firebox , a strong wind rip into the furnace burning side, after the promotion is reversed to change, and the secondary wind cut into the furnace, joint with light wind and form rotary stability aerodynamic field, so most of the wind pulverized coal is led to the furnace central region, ultimately in the heater form a light wind wrap a strong wind, a second air parcels light wind, and wind wrap powder situation, a second wind and light wind in the near wall region of water wall form oxidizing atmosphere, away from water wall region the pulverized coal burning. The invention achieves ultra-low NOx emission, while the burning area prevents to slag and ensure the high combustion efficiency etc. characteristics.

This invention relates to a method to reduce ammonia nitrogen pollution during the modification process of zeolite. The method comprises, in the process, exchanging sodium in the zeolite with potassium compounds, and then exchanging zeolite with ammonium salts. The ratio of potassium compounds to zeolite is 0.01~0.5, reaction temperature is 5-100DEG C, and the reaction time is 0.1-6 hours. The method will not increase the modification cost and can reduce ammonium salt use by 50%, therefore reducing ammonia nitrogen pollution and the burden of ammonia nitrogen wastewater treatment process and investment. It is an environmental technology for zeolite modification. The prepared zeolite catalyst has lower sodium content with catalytic activity basically unchanged or increased.

The invention relates to detection on hydrogen peroxide, and specifically discloses mimic enzyme test paper for detecting hydrogen peroxide, and preparation and application thereof. The mimic enzyme test paper is a surface modified cellulosic material loaded with an iron-based compound and a color developing agent, wherein the load amount of the iron-based compound is 1%-30% of the mass of the surface modified cellulosic material; the load amount of the color developing agent is 0.1%-20% of the mass of the surface modified cellulosic material; the color developing agent is 3, 3', 5, 5'-tetramethyl benzidine (TMB). According to the test paper provided by the invention, the color developing agent and the iron-based compound are loaded on the cellulosic material (such as filter paper, cotton and cotton cloth), the test paper simulates enzymatic decomposition of hydrogen peroxide and detects hydrogen peroxide, the mimic enzyme test paper is used in chemical industry, spinning, environment protection, medical treatment and food processing, and the application belongs to detection on hydrogen peroxide in the range of food safety, medical treatment, public health and environmental technology.

The invention belongs to the field of environmental technology and water treatment and specifically relates to a preparation method of a catalyst for photocatalytic degradation of antibiotic, a catalyst prepared by the method and application of the catalyst for photocatalytic degradation of antibiotic. The catalyst is anatase-phase banded-structure nanocrystal titanium dioxide exposing the crystal face {100}, and is synthesized by a homogeneous hydrothermal reaction and a calcination technology. The catalyst shows outstanding photocatalytic degradation performance on the photocatalytic degradation of broad-spectrum antibiotic medicines such as oxytetracycline, tetracycline hydrochloride, amoxicillin, norfloxacin and enrofloxacin. The catalyst has the characteristics of high activity, stable performance, easiness in separation, no toxicity and the like; the synthesis technology is pollution-free; the catalyst has a broad application prospect while the antibiotic medicine pollution is increasingly severe.

The invention discloses a reduced graphene oxide supported nano Fe3O4 / Mn3O4 composite and preparation and application thereof and belongs to the field of material preparation and environmental technology. In the composite, a mass ratio of reduced graphene oxide to Fe3O4 / Mn3O4 is (1:20) to (1:1), and a mass ratio of Fe3O4 to Mn3O4 is (1:3) to (3:1). A preparation method comprises the steps of preparing nano Mn3O4 particles by means of polyol forced hydrolysis, preparing graphene oxide supported nano Fe3O4 / Mn3O4 composite by using Massart hydrolysis among co-precipitation methods with graphene oxide as a support, and reducing with hydrazine hydrate to obtain the reduced graphene oxide supported nano Fe3O4 / Mn3O4 composite.

The invention relates to an ultrasonic algal-removing boat used for water bloom emergency treatment. The boat is loaded with an ultrasonic algal-removing device, adopts the sedimentation function of ultrasound on the blue-green algae of water to sedimentate the blue-green algae to the water bottom, is applied in the emergency treatment when the water bloom in the lake outbreaks and can reach the effect of removing floated blue-green algae on the surface of the lake. The boat of the invention comprises a catamaran (1) with an algae-laden water drainage channel (3), an ultrasonic transmitter array (2) and other parts, wherein the ultrasonic transmitter array (2) is arranged in the algae-laden water drainage channel (3) of the catamaran (1); and the ultrasonic transmitter array (2) radiates the ultrasound to act on the blue-green algae of water in the algae-laden water drainage channel (3) and ensure that the blue-green algae loses the floatability and is discharged and sedimentated to the water bottom under the action of a boat-pushing propeller (5), thus achieving the aim of removing the blue-green algae. The system is an environmental technology which adopts the ultrasonic technology to remove the blue-green algae of water body in water head site safely and economically.

The invention relates to a preparation method of a composite adsorption material for removing chlorine ions in water, and belongs to the technical field of materials and environment. In the invention, solid magnesium salt raw material and aluminum salt are prepared into metal salt solution and mixed with molecular sieve, and a precipitating agent is added to load hydrotalcite formed by magnesium and aluminum on the surface of molecular sieve. The invention can effectively remove high-concentration chloride ions in waste water, and the composite material can be regenerated and reused. The preparation method of the composite material in the invention is simple, the source of raw materials is wide, the price is low, the process flow is simple, the equipment investment is small, there is no environmental pollution, and the chlorine removal efficiency is high.

The invention provides a leaf collection environmental protection machine capable of rapidly degrading leaves, and relates to the technical field of environmental protection. The leaf collection environmental protection machinery that can degrade leaves rapidly includes an environmental protection robot body and a support plate. One end is fixedly connected with a universal roller, and the inner bottom wall of the environmental protection robot body is fixedly connected with a riser. The leaf collection and environmental protection machine that can degrade leaves quickly, drives the crushing blade to rotate through the second rotating shaft on the second motor, and crushes the collected leaves, which accelerates the degradation of leaves and effectively solves the problem of using the leaf collection and environmental protection robot for cleaning. The leaves on the road, and the current leaf collection environmental protection robot is difficult to degrade the collected leaves, most of the collected leaves are concentrated and burned, which violates the principle of environmental protection, and it is difficult to solve the problem of waste utilization.

The invention discloses an environment-friendly garbage smashing device, and relates to the technical field of environmental technology. The problem that an existing device is not thorough in smashing is solved. The device comprises a device main body, a hydraulic cylinder, a first filter plate, a storage box body, a feeding conveying belt and a second motor; a feeding box is arranged on the right side of the top of the device main body, the upper end of the right side of the feeding box is connected with a driving wheel through a sliding plate, the driving wheel is arranged on a first motor, the driving wheel is connected with a driven wheel through a feeding conveying belt, the second motor is arranged in the feeding box, the rear end of the second motor is fixedly connected with the inner surface of the rear wall of the device main body, a bearing plate is arranged in the device main body, the garbage can be effectively smashed, the smashing effect is good, triple smashing is achieved, the problem that garbage needs to be lifted to the high position to be put into a garbage box, and fatigue is generated is avoided, and the device is suitable for popularization.

The invention belongs to the field of environmental technology, and specifically relates to a high-performance glass ceramic prepared by compounding steel slag and red mud and a preparation method thereof. The glass ceramic prepared by compounding steel slag and red mud is prepared from the following raw materials in parts by weight: 30-65 parts of steel slag, 20-60 parts of red mud and 5-15 parts of river sand. The preparation method comprises the following steps of: uniformly mixing the steel slag, the red mud and the river sand; preparing base glass by a high-temperature melting method; and performing thermal treatment on the base glass to obtain the glass ceramic. According to the glass ceramic and preparation method provided by the invention, the glass ceramic is prepared by taking the steel slag and red mud as main raw materials, the waste steel slag and red mud are utilized, the land cost and the storage yard construction and maintenance cost for stacking the steel slag and red mud are reduced, and the pollution to the surrounding land environment, water sources and air caused by the steel slag and red mud is avoided, thereby being favorable for saving land resources and protecting the environment.

Belonging to the environmental technology field, the invention provides a micro-explosion soil remediation method, which enables a soil remediation agent to rapidly and fully disperse into polluted soil. Commonly used soil remediation chemicals include oxidizing agents and reducing agents, like potassium permanganate, low concentration hydrogen peroxide, a Fenton reagent, iron powder, surfactants and a variety of composite remediation agents. The micro-explosion soil remediation method aims to enhance the dispersion sufficiency and dispersion speed of chemicals in soil, enable rapid and full dispersion of chemicals into polluted soil and achieve a high degree of dispersion. The remediation method is especially suitable for conditional in-situ soil remediation engineering.

The invention discloses an environment-friendly tanning process for Tan sheepskin, which is characterized in that it adopts the following steps: 1) spraying water to return moisture; 2) beating wool; 3) soaking in water; 4) degreasing; 5) re-immersing in water; 6) degreasing again ;7) fleshing; 8) pickling; 9) tanning; 10) standing overnight; 11) water rejection; 12) brushing with fatliquoring agent; 13) standing overnight; 14) drying; 15) still damp; 16) Dry shoveling; 17) rinsing; 18) aluminum liquid brushing; 19) drying; 20) dry shoveling; 21) storage. The present invention aims at the hardening of the leather board, hair loss of needles or excessive free formaldehyde in the prior art. After analysis, it is because the traditional process of tanning the tanned surface or nitrating with formaldehyde or aldehyde and aluminum causes the leather surface of the leather board to be tanned. Unsatisfactory, high formaldehyde content and other problems. Now the skins are degreased and then pickled, tanned, brushed with fatliquoring agent, brushed with aluminum liquid, etc., so that the tanning process of Tan sheepskin is more reasonable, the product quality is greatly improved, and the use is increased.

The invention pertains to biological resources and environmental technology, in particular to a marine caphalopoda animal I collagen protein product and the preparation method thereof. The invention discloses the marine caphalopoda animal collagen protein, the collagen protein is extracted from the skin of marine caphalopoda animals, the collagen protein is white or white with the light brown and is the I type collagen protein, the molecular type is (Alpha 1)2Alpha2 type, the molecular weight of the main peptide chain is 300 to 330KD, the intrinsic viscosity is 12 to 18dL / g, the denatured temperature is 15 to 30 DEG C, and every 1000 amino acid residues contain 280 to 330 parts of glycine, 80 to 90 parts of proline and 60 to 70 parts of hydroxyproline respectively. The preparation method takes squid skin which is one of the processing waste of the seafood as raw material for preparing the I type collagen protein; an edible biochemical reagent, mild preparation conditions and simple physical method are adopted for carrying out the extraction of the collagen protein in the squid skin; the obtained collagen protein product dose not have the residue problem of the toxic and harmful reagents, which has very high safety; therefore, in addition to the general usages of the collagen protein, the marine caphalopoda animal I collagen protein product can also be directly applied in the industries of general foods, special foods, functional foods and biomedicine; the usage of the method for preparing the collagen protein is environmental-friendly, which does not discharge toxic and harmful substances to the environment and can avoid the new pollution to the environment of certain preparation methods.

This invention relates to a method to reduce ammonia nitrogen pollution during the modification process of zeolite. The method comprises, in the process, exchanging sodium in the zeolite with potassium compounds, and then exchanging zeolite with ammonium salts. The ratio of potassium compounds to zeolite is 0.01~0.5, reaction temperature is 5-100DEG C, and the reaction time is 0.1-6 hours. The method will not increase the modification cost and can reduce ammonium salt use by 50%, therefore reducing ammonia nitrogen pollution and the burden of ammonia nitrogen wastewater treatment process and investment. It is an environmental technology for zeolite modification. The prepared zeolite catalyst has lower sodium content with catalytic activity basically unchanged or increased.

The invention belongs to fields of energy utilization and environmental technology, and particularly provides a preparation method of Ni@SiO2 core-shell structure catalysts and application of Ni@SiO2core-shell structure catalysts in a methane and carbon dioxide reforming reaction. The catalyst is a core-shell structure catalyst with nickel nano-particles as cores and silicon dioxide spheres as shells. The mass percentage of nickel is 3-6 wt%, the size of nickel particles is 1-4 nm, the mass percentage of silica is 97-94 wt%, and the diameter dimension of silicon dioxide spheres is 25-35 nm. The catalyst has better performance in the dry reforming reaction of methane and carbon dioxide. The methane conversion rate can reach 88% at 750 DEG C, the carbon dioxide conversion rate can reach 93%, and the catalytic activity can be kept stable for 2,500 minutes or more. With non-precious metal nickel as an active center, the catalyst greatly reduces catalyst cost, and is easy to operate, and has a good development prospect in industrial production.

palladium catalyst prepared by method and application thereof The invention discloses a preparation method of a palladium catalyst, the palladium catalyst prepared by the method and an application thereof, and belongs to the field of environmental technologies. The preparation method of the palladium catalyst comprises the following steps of: firstly carrying out acid pretreatment on a carbon carrier to prepare a pretreated carbon carrier; mixing palladium chloride, sodium citrate, glycol with the pretreated carbon carrier, carrying out oxidation reduction reaction, and loading reduction state palladium onto the pretreated carbon carrier after the reaction. The amorphous active metal component Pd prepared by the method is uniformly distributed on the surface of the carbon carrier. The particle size of the component Pd is distributed within 3 nm to 6 nm and the active metal component Pd has strong adhesion, high dispersity and high effective unitization rate. When the Pd catalyst is used as an electrochemical cathode, the greenhouse gas carbon dioxide is reduced into liquid fuel. The reduction efficiency of carbon dioxide is high; the yield of the liquid fuel is high; and the purpose of reducing carbon discharge is effectively achieved.

The invention belongs to the field of water treatment environmental technologies, and in particular relates to a method for purifying polder area multiple sewage by using a polder area ditch-pond ecological system. According to the process provided by the invention, by virtue of integration and optimization of ecological restoration combination technologies including a polder area ditch-pond form transformation technology, a polder area ditch-pond water system communication technology, a foundation base repair and transformation technology, an aquatic animal and plant restoration technology, an aquatic plant floating bed strengthening technology and the like, a polder area ditch-pond system water purification comprehensive improvement engineering, which takes water quality improvement as a basis and ecological restoration as a core and also gives attention to landscape promotion, is constructed. The method can significantly improve the environmental quality of polder area ditch-pond water to realize organic combination of water purification and landscape promotion, thereby not only effectively reducing wastes of polder area soil and water resources, but also significantly reducing material resource, money resource and manpower inputs on polder area environmental management by government. Moreover, the process provided by the invention aims at purifying the multiple sewage, which is polluted by agricultural surface sources, industrial point sources, town and rural lives and initial rainwater, in polder area ditches and ponds.

The invention relates to the field of environmental technology utilization and discloses a treatment method for improving the repair effect on cadmium-contaminated soil. According to the method, the combined effect of a chemical repair agent, sisal and bamboo reeds is adopted; after the repair agent is applied to the to-be-repaired cadmium-contaminated soil, the sisal and the bamboo reeds are interplanted; heavy metal cadmium is absorbed and accumulated by utilizing the flocculation effect of the chemical repair agent and the enrichment effect of the sisal and the bamboo reeds; and after outplanting in autumn every year, ashing processing is performed, so as to extract the heavy metal cadmium and achieve the purpose of repairing the soil. According to the treatment method, the combined effect of the chemical repair agent, the sisal and the bamboo reeds is adopted, because the biomass of the sisal and the bamboo reeds is large, the patience and the transfer volume to cadmium in the soil environment are large, the bamboo reeds are perennial plants and can be simply planted and managed, and processing is separated from food chains, the repair effect on the cadmium-contaminated soil and the safety of a subsequent process are greatly improved, secondary pollution is avoided, and the cadmium-contaminated soil can be preferably repaired.

The invention provides a sewage treatment device which is convenient for cleaning sundries, and relates to the technical field of environmental protection. The sewage treatment device for easy cleaning of sundries includes a box body, the bottom of the box body is fixedly installed with feet, the top left side of the box body is connected to a water inlet pipe, and the right side of the box body is connected to a water outlet pipe. The filter plate is fixedly installed inside. This sewage treatment device is convenient for cleaning sundries. The extension and contraction of the electro-hydraulic push rod drives the push rod to slide on the surface of the filter plate. The sieve hole of the filter plate is blocked by particles, which affects the filtering effect. The push rod drives the brush to push the sundries on the surface of the filter plate to the inside of the collection box, and the inner wall of the clamp plate is provided with a block, which reduces the friction between the collection box and the collection box. The gap between the plates prevents the dirt from flowing out through the gap between the pallet and the miscellaneous box. At the same time, the miscellaneous box can be pulled out to clean up the sundries, which helps to improve the efficiency of sewage treatment.

The invention belongs to the field of nuclear technology application and environmental technology protection, and discloses a method for facilitating removal of irradiation of organic pollutants in waste water by adding ferrous ions. The method is applied to treatment of sulfanilamide antibiotic waste water. The method applies an ionizing radiation technique, adds the ferrous ions, and combines a Fenton oxidation method, so that the generation quantity of .OH is increased, the reaction efficiency is improved, the absorption dose required by the removal of the irradiation of antibiotic is reduced, and the energy consumption is reduced greatly. In addition, the method utilizes H2O2 generated in a water radiation decomposition process, and additional addition is not required, so that the cost is lowered. The method is simple in technology, easy and simple to operate, low in energy consumption and low in cost; the method is high-efficiency, rapid, economically feasible, and free from secondary pollution when the method is used for treating the sulfanilamide antibiotic waste water; and the method has wide application prospects in waste water treatment and environmental protection.

The invention belongs to the field of resources and environmental technologies, in particular to an additive for low-volatile coal and a preparation method thereof. The additive for the low-volatile coal is characterized by comprising the following raw materials by weight percentage: 86-92% of oil shale, 3-4% of sodium chloride, 2-5% of potassium permanganate, 1-2% of sodium nitrate and 2-3% of potassium chlorate. The invention can improve the combustion efficiency of the low-volatile coal and have simple process and low cost.

The invention relates to a method for removing phosphorus from wastewater by utilizing coal ash, belonging to the field of environmental technologies. The method comprises the following steps: (1) providing phosphorus-contained wastewater containing at least one organic phosphorus, and adjusting the value of the wastewater to weak acidity; (2) adding the coal ash into the pH-adjusted wastewater, and carrying out heating under stirring and allowing the coal ash and the wastewater to react and adsorb; and (3) after the reaction is completed, separating the wastewater and the coal ash. The method provided by the invention utilizes the coal ash to remove most of inorganic phosphorus and a part of the organic phosphorus in the wastewater, and the total phosphorus-removal efficiency can reach more than 50%. After phosphorus removal, the coal ash solves the problem of stability due to high content of active calcium oxide in coal ash, and can be used as a raw material of a building material for utilization, so the effect of using wastes to treat the wastes is achieved.

The invention is applicable to the field of environmental technology and provides a mudflat ecology restoration method and device. The method comprises the steps that a remote sensing image of a mudflat is acquired, and spatial distribution of mudflat landscape pattern constitution elements is extracted according to the remote sensing image; the mudflat landscape pattern constitution elements include at least one of an ecological source region, an ecological corridor and ecological nodes; a mudflat landscape pattern model is established, and the mudflat landscape pattern model is verified according to spatial distribution information of the mudflat landscape pattern constitution elements to obtain impact factors impacting a mudflat landscape pattern; an evaluation index set for evaluating a mudflat ecotope environment is established according to the impact factors, wherein the evaluation index set comprises at least two groups of evaluation indexes and weights in one-to-one correspondence; and a corresponding manual intervention restoration model is established according to the evaluation index set and a mudflat type, and mudflat ecology is treated according to the manual intervention restoration model. Through the method, the overall landscape pattern of the mudflat region can be fully considered, and the comprehensive remediation effect on the whole mudflat is improved.

The invention relates to pollutant treating devices in the environmental technology, and discloses a novel gliding-arc plasma organism treating device in combination with catalysts. The gliding-arc plasma organism treating device is composed of a positive electrode, a negative electrode and a cylindrical sealing cavity, and the sealing cavity is composed of an upper insulation cover and a lower insulation cavity; the positive electrode comprises a central rotating shaft, at least three first protrusions in the same shapes radially extend out from the bottom end of the rotating shaft, and the top end of the rotating shaft penetrates through the insulation cover and is connected with an external high-voltage power source; the negative electrode is in a circular ring shape, is attached to theinner wall of the insulating cavity and is connected with the external high voltage power source, and second protrusions corresponding to the first protrusions of the positive electrode in position are arranged on the inner wall of the negative electrode; the sealing cavity is filled with the catalysts. The device is easy to operate and low in manufacturing cost; the length of electric arcs is developed by rotating the electrodes, and an unbalanced area is lengthened for sufficient reacting; meanwhile, due to the special arrangement mode of the electrodes, the catalysts can be in sufficient contact with the electric arcs, and the catalytic effect is maximized.

A method for preparing flower ceramic particles with urban water supply sludge belongs to the field of environmental technology, and relates to the resource utilization of solid waste. Materials accounted by dry weight rate, including 30-50 percent of water supply sludge, 10-30 percent of coal slurry, 20-30 percent of flint clay, 5-7 percent of Chinese chestnut shell, 8-10 percent of waste glass and the like, are dried, grinded, mixed and uniformly agitated to be prepared into spheres 6-15 mm in particle diameter. The spheres are subjected to pre-heating torrefaction and cooling so as to form the high performance flower ceramic particles. The ceramic particles prepared by the method are light and have loose and porous surfaces, can absorb a considerable amount of water, and has proper ability to keep nutritious substances. Compared with soilless substrates such as sand and wood chips, the flow ceramic particles have the characteristics of cleanness, neatness, attractiveness in shape, lightness, no pollution, cleanable performance, durability, higher stability in chemical property and the like.

The invention discloses a method for evaluating an environmental technology based on a benchmarking method. Specifically, a three-dimensional index system is established; index benchmark values are extracted based on a technical database and an engineering case library constructed by literature research; technical single index evaluation is completed through a normalization algorithm and a hierarchical assignment method. Determining the weight of each index in combination with an entropy weight method and a subjective weighting method, calculating a comprehensive evaluation result of a singletechnology in each dimension through a weighting method, expressing the evaluation result in two forms of a single-dimensional radar map and a three-dimensional point position map, and objectively andcomprehensively evaluating the environmental technology; the method provided by the invention is a systematic and objective technology comprehensive evaluation method, and the method not only can realize dynamic evaluation of the technology, but also has strong operability.

The invention discloses a trenching device for urban road construction and relates to the technical field of resource and environmental technologies. The trenching device for urban road construction comprises a supporting slide rod; fixed supporting rods are symmetrically and fixedly connected to the two ends of the bottom of the supporting slide rod; fixed bases are fixedly connected to the bottoms of the fixed supporting rods; a first slide rod is arranged on the surface of the supporting slide rod in a sleeving mode; the surface of the supporting slide rod and the first slide block are in sliding connection; a first telescopic rod is fixedly connected to the bottom of the first slide block; a first outer frame is fixedly connected to the end, away from the first slide block, of the first telescopic rod; a first motor is fixedly connected to the top of an inner cavity of the first outer frame through a fixing block; and a first rotating shaft is rotationally connected to the rotatingend of the first motor. The trenching device for urban road construction achieves the purpose of reducing the trenching cost, the whole device is simple in structure and low in manufacturing cost, and trenches are uniform in size and specification.

An innocent treatment and resource utilization method for red mud. Red mud is a waste slag discharged from a production process of alumina treatment; and a large amount of strong alkali substances contained in the slag is a major cause of environmental pollution. A red mud treatment project belongs to the field of environmental technology, and studies on the subjects of environmental science and technology, environmental engineering and solid pollution control engineering. The red mud is roasted by high temperature and subjected to acid leaching treatment to separate metals with recycling value in the red mud, such as aluminum and iron; the remaining neutral red mud slag is added with coal gangue, and sintered at 950-1100 DEG C (or added with an adhesive); and an obtained brick has compressive strength reaching 1-15 MPa, and quality completely meeting requirements of ''sintering common brick'' in GB-5101-2003. The method is suitable for treatment of red mud discharged from different production processes.