Disclosed in the present invention is an efficient sequencing-batch sludge drying device, comprising a housing, a driving electric motor, two stirring shafts arranged spaced apart from each other, and a plurality of blades arranged on each stirring shaft, wherein the stirring shafts and the blades arranged on the stirring shafts are each provided with a hollow inner cavity, and the hollow inner cavities are in communication with one another; tail ends of the stirring shafts are connected to a drainage device, such that steam introduced into the stirring shafts condenses into water and then flows into the drainage device; and the water in the drainage device is conveyed into a heating shell, which covers the housing. In the present invention, steam is inputted into the stirring shafts to indirectly heat sludge, and the water condensed from the steam is at a high temperature and is conveyed into the heating shell to heat the housing, such that the utilization of the water condensed from the steam is achieved, and not only is energy consumption saved on, but the drying efficiency for the sludge is also increased.
An organic waste anaerobic reactor, comprising a reactor tank body (1), a central stirrer (3) and a residue trap (2). The residue trap (2) surrounds the upper part of the inner wall of the reactor tank body (1) and is inclined in the circumferential direction. The lowest end of the residue trap (2) is connected to a top discharge port (6). The upper part of the reactor tank body (1) is circularly provided with multiple flushing pipes (10) which correspond to the residue trap (2). The lower part of the reactor tank body (1) is provided with multiple bottom residue outlets (9). The side wall of the reactor tank body (1) is provided with a feed inlet (4) and a bottom discharge outlet (5). A feed pipe passes through the feed inlet (4) and is vertically inclined inward at a certain angle in the reactor tank body (1). The central stirrer (3) is arranged inside the reactor tank body (1), and comprises a first blade (3-1) below the liquid level for stirring the material and a second blade (3-2) at the liquid level for cleaning scum.
A grease extraction device for an organic waste leachate and an extraction process. The extraction device comprises: a leachate receiving device, an impurity removal machine, a pipeline heater, a buffer tank, a horizontal centrifuge, and an oil-water separator which are connected in sequence. A residue outlet of the impurity removal machine and a residue outlet of the horizontal centrifuge are connected to waste residue barrels; a wastewater outlet of the horizontal centrifuge is connected to a wastewater pool; a grease outlet of the oil-water separator is connected to a crude oil tank; an oil-water outlet of the oil-water separator is connected to the buffer tank.
Disclosed are a permeable reactive wall and a restoration method. The present invention belongs to the technical field of the restoration of contaminated soil and underground water. The permeable reactive wall comprises a pre-reaction zone, a main reaction zone, and an effluent buffer zone, which are arranged in sequence in a water flow direction, wherein the pre-reaction zone and the effluent buffer zone are both filled with a filler and zerovalent iron; the main reaction zone is filled with zerovalent iron and an adsorbent; and the main reaction zone is provided with a monitoring hole, or the pre-reaction zone, the main reaction zone and the effluent buffer zone are all provided with a monitoring hole, for sampling and monitoring whether passivation and blockage occur and for adding a depassivation agent. In the present invention, after a reaction runs for a period of time, due to passivation of the zerovalent iron and the adsorbent, clogging, and activity reduction, a regeneration, activation and depassivation agent, such as hydrogen peroxide or an organic or inorganic acid salt, e.g. sodium oxalate or potassium chloride, is added to react with metal oxides and hydroxide precipitates on the surface of the zerovalent iron for depassivation, thereby increasing the specific surface area of the material, reducing the pH, and improving the restoration efficiency.
An enhanced anaerobic remediation reagent for a chromium-contaminated site, a preparation method, and a usage method. The enhanced anaerobic remediation reagent comprises: vegetable oil, an emulsifier, glycerin, lactate, lactate ester, vitamin B12, diammonium phosphate, and water. The preparation method comprises: adding an emulsifier and glycerin to part of water, and heating to dissolve same to form a solution A; adding lactate, lactate ester, vitamin B12, and diammonium phosphate to the remaining part of water, and mixing same to form a solution B; stirring vegetable oil, the solution A, and the solution B for emulsification, and standing for discharging. The usage method comprises: mixing 6%-10% by volume of an enhanced anaerobic remediation reagent with 90%-94% by volume of hydrogen-containing water, and then injecting same into the soil or groundwater. The remediation reagent is efficient, long in sustained release time, environmentally friendly, and easy in material acquisition.
Disclosed is a self-propelled, self-positioning and self-locking precise aeration device. A aerator is connected to a fan, the aerator is provided at the bottom of a floating foundation carrier to aerate water, a dissolved oxygen meter is provided at the bottom of the floating foundation carrier to acquire dissolved oxygen parameters of the water, a radar image positioning system acquires a radar distance and image information around an aeration device body, an integrated control box is connected to the fan and the aerator, so as to control the propelling displacement and the propelling direction of the aeration device body, a sub-locking block is fixed at a corner of the floating foundation carrier, and the sub-locking block and a main locking block lock each other when the sub-lock block arrives at the position of the main locking block along with the floating foundation carrier. The technical solution of the present invention achieves the self-propelling, self-positioning and self-locking of the aeration device, achieves the real-time interlocking and precise control of an aeration amount, enhances the aeration and oxygenation effects and the biological degradation effect of the water, and improves the convenience of maintenance and the operational economy.
Disclosed are an agent for in-situ remediation of a contaminated site and a construction method for same, wherein the agent for in-situ remediation of a contaminated site comprises an oxidant and a curing agent, and the construction method for the in-situ remediation of a contaminated site comprises uniformly mixing, in situ, the agent for in-situ remediation of a contaminated site with contaminated soil or an aquifer, and carrying out in-situ remediation on the contaminated site by means of coupled in-situ chemical oxidation and in-situ curing processes. By means of coupling the in-situ chemical oxidation process with the in-situ curing process and by using the curing agent as an activating agent for the oxidant, the amount of the agent used is reduced, the concentration of sulfate in a remediation region after oxidation is reduced, curing and encapsulation of organic contaminants absorbed into soil or aquifer particles is realized, and organic substances treated by means of in-situ chemical oxidation are prevented from rebounding; in addition, the oxidant used is conducive to a curing reaction and can reduce the addition of the curing agent.
Disclosed are a seepage-proof structure for use in emergency site construction and a construction method for the seepage-proof structure. The seepage-proof structure comprises: a leveled and compacted foundation layer, a compacted clay layer, a composite seepage-proof layer, an upper protective layer, and a fine sand cushion layer provided in an upward sequence; the composite seepage-proof layer comprising a GCL cushion and an HDPE geomembrane provided in an upward sequence. The construction method comprises: compacting a foundation layer of an existing site to form a leveled and compacted foundation layer; laying and compacting clay on the leveled and compacted foundation layer to form a compacted clay layer; sequentially laying a GCL cushion and an HDPQ geomembrane on the compacted clay layer to form a composite seepage-proof layer; laying a protective layer on the composite seepage-proof layer; and laying fine sands on the protective layer to form a fine sand cushion layer. The geotechnical raw materials employed by the present invention are available from a wide variety of sources, are convenient to acquire, satisfy special requirements on raw material formulations in "emergency" cases such as a medical one, and provide strong pertinence; moreover, the structure provided is quick to construct and provides improved seepage-proof effects, thus further expanding applications of conventional geotechnical raw materials in the field of special seepage prevention.
E02D 31/00 - Dispositions de protection pour les fondations ou ouvrages réalisés par des techniques de fondationMesures dans le cadre des techniques de fondation pour protéger le sol ou l'eau du sous-sol, p. ex. prévention ou neutralisation de la pollution par le pétrole
9.
COMPOSITE HDPE MEMBRANE-BASED PREVENTION AND CONTROL SYSTEM FOR EMERGENCY FACILITY BASE, AND CONSTRUCTION METHOD
Disclosed are a composite HDPE membrane-based prevention and control system for an emergency facility base, and a construction method. The system comprises: selection to a modular composite HDPE membrane-based prevention and control material: the composite HDPE membrane-based prevention and control material comprises two pieces of geotextile and one membrane which are compounded on site, and the two pieces of geotextile and one membrane refer to an enhanced HDPE geomembrane and widened geotextile; a quick assembly process: the quick assembly process comprises a welding process for the enhanced HDPE geomembrane and an overlapping process for the widened geotextile; a welding seam detection process: the welding seam detection process comprises a through welding seam primary pressurization and depressurization detection method; and a universal patch component: the universal patch component is formed by extruding and welding double layers of HDPE membranes. According to the present invention, by means of said design, finished product protection, quick connection and detection of the prevention and control system can be upgraded, and efficient contamination prevention and control for an emergency facility base is finally achieved; the present invention has the advantages of a high standard, high efficiency, a short construction period, high practicability, and easiness in base quality control.
E02D 31/00 - Dispositions de protection pour les fondations ou ouvrages réalisés par des techniques de fondationMesures dans le cadre des techniques de fondation pour protéger le sol ou l'eau du sous-sol, p. ex. prévention ou neutralisation de la pollution par le pétrole
B29K 23/00 - Utilisation de polyalcènes comme matière de moulage
B29L 7/00 - Objets plats, p. ex. pellicules ou feuilles
10.
WASTEWATER TREATMENT DEVICE AND TREATMENT PROCESS FOR ORGANIC CONTAMINATED SITE
Disclosed is a wastewater treatment device for an organic contaminated site, the device comprising: an air floatation device (1), used for carrying out a suspended particulate matter removal treatment on wastewater of an organic contaminated site, to obtain first treated wastewater; a photocatalytic oxidation reaction device (2), used for carrying out a photocatalytic oxidation treatment on the first treated wastewater, to obtain second treated wastewater; an activated carbon filtration device (4), used for filtering the second treated wastewater to obtain third treated wastewater, wherein if same reaches a standard, same enters a clean water tank (5) for reuse; a sludge concentration tank (6), used for carrying out a concentration treatment on sludge in the air flotation device (1) to obtain pretreated sludge; and a sludge dewatering device (7), used for carrying out a dewatering treatment on the pretreated sludge, wherein dewatered sludge is delivered out for centralized disposal. A wastewater treatment process for an organic contaminated site is further provided, and can perform treatment and reuse of organic wastewater, such as that containing chemicals, crude oil, dyes, and pesticides, in different types of organic contaminated sites.
C02F 9/08 - Traitement en plusieurs étapes de l'eau, des eaux résiduaires ou des eaux d'égout une étape au moins étant un traitement physique
C02F 11/147 - Traitement des boues d'égoutDispositifs à cet effet par déshydratation, séchage ou épaississement avec addition de produits chimiques utilisant des substances organiques
A detachable flexible floating cover, comprising single modules (1), a geomembrane cover body (2), an isolating pad (3), a sealing plate (4), and a gas collecting device (5). The single module comprises counterweight pipes (103), a geomembrane (101), and a foam plate (102); the foam plate (102) is wrapped by the geomembrane (101) and the foam plate (102) is welded to the geomembrane (101); the counterweight pipes (103) are fixed on the geomembrane (101) in a cross-connection manner; and a water collecting well (104) is provided at the lowest position of the single module (1). The gas collecting device (5) comprises a gas collecting patterned pipe (502), a gas collecting channel (503), and a gas outlet (504). The isolating pad (3) is provided on the geomembrane cover body (2), the single module (1) is connected to the geomembrane cover body (2) by means of the sealing plate (4), namely, the foam plate (102) on the single module (1) and the isolating pad (3) on the geomembrane cover body (2) are connected by means of the sealing plate (4), and the gas collecting channel (503) is formed. Each signal module (1) can collect rainwater and gas separately, the single module (1) can be conveniently replaced and repaired, and the cleaning of sludge in an adjusting tank can be completed.
Disclosed is an improved process for wet detoxification of a hexavalent-chromium-containing waste residue or hexavalent chromium polluted soil, comprising subjecting the hexavalent-chromium-containing waste residue or the hexavalent chromium polluted soil to a wet grinding treatment to obtain a residue slurry; delivering the residue slurry to a sulfuric acid-acetic acid mixed solution for an acidification treatment to obtain a material slurry; delivering the material slurry to a solution of a reducing agent for a reduction reaction, such that the hexavalent chromium in the material slurry is transformed into a trivalent chromium; and subjecting the trivalent chromium material slurry after the reduction reaction to solid-liquid separation, wherein the separated filtrate is partly recycled for the acidification treatment, and the separated filter cake is subjected to an external conditioning treatment. The generation of a calcium sulfate precipitate during the wet detoxification process is reduced by adding acetic acid, thus preventing the calcium sulfate precipitate from covering hexavalent chromium pollutant particles, and increasing the dissolution of the hexavalent chromium during the acid leaching stage; in addition, the acidified material slurry is gradually added to a solution of a reducing agent, thus promoting full contact between the hexavalent chromium pollutant particles and the reducing agent, and maintaining a microenvironment that is conducive to the occurrence of reduction reactions on a reaction interface.
A pretreatment process and apparatus for sorting the organic matter of kitchen waste. The pretreatment process comprises the following steps: storing material in a storage tank (1) and filtering liquid; transporting the material to a crusher (3) by a grab crane (2); crushing the material by the crusher (3); conveying the crushed material to a drum screen (5); and sorting out oversize material such as waste paper, woven fabric, and plastic in the material by the drum screen (5) for outbound incineration or landfill, conveying the screened undersize material to a magnetic separator (8), and sorting and recovering the magnetic metal in the material by the magnetic separator (8), the material subjected to magnetic separation being organic matter and being conveyed to an organic matter storage tank (10) for subsequent fermentation in a dry anaerobic system. The process has the advantages of high material separation rate and simple system, and can satisfy the requirements of subsequent dry anaerobic fermentation of kitchen waste.
The present invention provides a method for transforming an arsenic sulfide slag and curing and stabilizing the resulting compound by means of microencapsulation, comprising the following steps: (1) preparing arsenic trioxide from the arsenic sulfide slag as a raw material; (2) preparing 4-hydroxy-3-nitrophenylarsonic acid from the arsenic trioxide as a raw material; (3) preparing an iron-manganese dinuclear cluster metal arsenate compound having a porous structure; (4) subjecting the iron-manganese dinuclear cluster metal arsenate compound having a porous structure to surface coating with silicon; (5) synthesizing a Fe(0)/Al-SBA-15 mesoporous composite stabilizer by a hydrothermal reaction; and (6) subjecting the silicon coated iron-manganese dinuclear cluster metal arsenate compound to curing and stabilizing treatment by means of microencapsulation. The present invention involves transforming the arsenic sulfide slag into 4-hydroxy-3-nitrophenylarsonic acid and finally into a metal arsenate compound having a porous structure, which has the characteristics of good stability and low toxicity in comparison to conventional arsenic compounds. Thus, the toxicity associated with arsenic compounds can be greatly reduced.
An integrated treatment system and a treatment method for organic exhaust gas from thermal desorption of contaminated soil. The system comprises a pretreatment separating unit (1), a condensation cooling unit (2), a vacuum supply unit (3), an organic exhaust gas removal unit (4), and a control unit (5) connected in sequence; the pretreatment separating unit (1) comprises a first steam separator (6); the condensation cooling unit (2) comprises a cooling heat exchange device and a second steam separator (8); the vacuum supply unit (3) comprises at least one vacuum pump or vacuum fan (11); the organic exhaust gas removal unit (4) comprises a pretreatment temperature and humidity adjusting device, an adsorption device, and a matched regenerating device; the control unit (5) is connected to the pretreatment separating unit (1), the condensation cooling unit (2), the vacuum supply unit (3), and the organic exhaust gas removal unit (4) separately, and is used for controlling automated operation of each unit. The system can achieve efficient treatment of exhaust gas from in-situ thermal desorption, and has good treatment effect and high removal rate of organic substance.
B01D 53/04 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p. ex. chromatographie préparatoire en phase gazeuse avec adsorbants fixes
B01D 53/00 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols
B01D 50/00 - Combinaisons de procédés ou de dispositifs pour la séparation de particules de gaz ou de vapeurs
B01D 49/00 - Séparation de particules dispersées dans l'air, des gaz ou des vapeurs par d'autres méthodes
A geomembrane construction method, which relates to the technical field of anti-seepage material construction methods. The geomembrane construction method comprises: S100, laying a geomembrane on a construction surface; S200, performing a test welding on the laid geomembrane; S300, detecting a result of the test welding; S400, when the result of the test welding does not satisfy set requirements, adjusting welding parameters again, and repeating step S200; and S500, when the result of the test welding satisfies the set requirements, performing a welding operation on the geomembrane, so as to weld the geomembrane to the construction surface. The present invention solves the problems that, when a geomembrane is constructed by means of laying, welding and testing, the construction quality of the geomembrane cannot be guaranteed and the anti-seepage effect of the whole project is affected due to lack of perfect construction methods and test standards. The laid geomembrane is first subjected to test welding, then the result of the test welding is detected, and the geomembrane is subjected to welding when said result satisfies the set requirements, ensuring the welding quality of the geomembrane, improving the anti-seepage effect of the geomembrane.
E02D 31/00 - Dispositions de protection pour les fondations ou ouvrages réalisés par des techniques de fondationMesures dans le cadre des techniques de fondation pour protéger le sol ou l'eau du sous-sol, p. ex. prévention ou neutralisation de la pollution par le pétrole
17.
COMPLEX DIAPHRAGM WALL FOR ENVIRONMENTAL PROTECTION OF LANDFILL IN SOFT SOIL AREA, AND CONSTRUCTION METHOD THEREFOR
Disclosed are a complex diaphragm wall for environmental protection of a landfill in a soft soil area, and a construction method therefor. The complex diaphragm wall comprises a flexible core wall arranged surrounding a landfill, wherein the depth of the flexible core wall is sufficient for the flexible core wall to extend from the earth's surface to be embedded in an impermeable layer; plastic wall bodies are respectively arranged on inner and outer sides of the flexible core wall; a support wall body is respectively arranged on an inner side of the internal plastic wall body and on an outer side of the external plastic wall body; a transition area is arranged between the internal support wall and the landfill; and an underground water pump-drainage well is arranged in the transition area. The present invention, according to certain procedures, i.e. constructing the support walls, vertically grooving, vertically installing the flexible core wall, preparing plastic concrete based on specific proportions and constructing the plastic wall bodies in an underwater pouring manner, and by means of the technical solution, can effectively isolate a hazardous waste landfill from accidental liquid leakage to protect soil and underwater on the premise of ensuring the stability of a surrounding embankment and a foundation of the landfill.
E02D 31/00 - Dispositions de protection pour les fondations ou ouvrages réalisés par des techniques de fondationMesures dans le cadre des techniques de fondation pour protéger le sol ou l'eau du sous-sol, p. ex. prévention ou neutralisation de la pollution par le pétrole
18.
PROCESS FOR REMEDIATION OF CONTAMINATED SOIL USING CHEMICAL ELUTION AND CHEMICAL REDUCTION IN COMBINATION
A process for remediation of contaminated soil using chemical elution and chemical reduction in combination, comprising the following steps: constructing a spray field (8); pretreatment and heaping of contaminated soil; providing a spray device; formulating an elution solution in a reagent tank (1); performing a spraying process using an acid, an alkali or a salt as an elution liquid, and determining whether the concentration of contaminants in the soil leachate satisfies a remediation target; and performing a spraying process using a reducing agent as an elution liquid, and determining whether the concentration of contaminants in the soil leachate satisfies a remediation target. The spraying process using water as the elution liquid is performed before the spraying process using an acid, an alkali or a salt as the elution liquid. The advantages of the chemical reduction stabilization technology and the chemical elution technology are combined by using a heaping and spray process, and the inevitable problems of these two technologies are solved. The use of the reducing agent solution circulating spray process makes the reduction of contaminants more thorough, and at the same time reduces a large amount of contaminant pollution, greatly reducing the use of the reducing agent and reducing environmental risks.
A pollution remediation device for use in single-layer or multi-layer in-situ injection, comprising: a depth gauge (4), a separation tube (3), an injection tube (1), an in-tube separator (7), blocking devices (8) and a salt solution injection tube (5), wherein the depth gauge is fixed to an outer side of a tube wall of the separation tube, the in-tube separator is a circular ring structure, a circular opening (10) is disposed on the circular ring of the in-tube separator, the injection tube penetrates the circular opening on the in-tube separator, and the in-tube separator is fixed in the separation tube; the blocking devices are rubber bladder structures sleeved on the outer side of the tube wall of the separation tube, the blocking devices correspond to the location of the in-tube separator, the separation tube and the blocking devices are disposed in an injection well (9), and the salt solution injection tube and the blocking devices are a communicating integrated structure. The present technical solution implements artificial layered injection of an entire screen that is in-situ injected, and simultaneously injects a liquid medicinal agent at different depths of a plurality of layers, thereby achieving the objectives of intensive treatment and precise treatment for different polluted strata and heavily polluted depths.
A stabilizing agent for treating chromium contaminated soil and an application thereof, the stabilizing agent comprises a crystal-volume expanding agent, a precipitating agent, a flocculating agent and a pH regulator, wherein the crystal-volume expanding agent is one of cement or clay materials or a combination thereof; the precipitating agent is one of sulfide, polysulfide, sulfite or pyrosulfite or a combination thereof, said agents can remarkably reduce the leaching concentration of chromium in the soil without damaging the property of the soil.
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