37results about How to "Reduce pollution concentration" patented technology

The invention provides a method for animal and plant-biochar synergistically restoring of petroleum-heavy metal polluted soil. Biological carbon base fertilizer is applied into the petroleum-heavy metal polluted soil and mixed evenly, and seasoning is conducted; earthworms are placed in the petroleum-heavy metal polluted soil to be bred after the seasoning is completed, then castor-oil plants are planted, and the castor-oil plants are removed overall after the harvesting of fruits of the castor-oil plants is completed; after the castor-oil plants are removed overall, the biological carbon base fertilizer is applied into the petroleum-heavy metal polluted soil again and mixed evenly, and seasoning is conducted; after the seasoning, earthworms are placed in the petroleum-heavy metal polluted soil to be bred, and then willows are planted; and the steps are executed circularly and repeatedly until the content of heavy metal in the soil is up to the safety standard. According to the method, the soil remediation effect is good; the combination of the biochar, animals and plants reinforces compound restoration and the effect is very obvious. In addition, secondary pollution to the soil is avoided.

The invention relates to the technical field of plant remediation of oil-contaminated soil, in particular to a method for treating and remediating oil-contaminated soil by using gaillardia aristata pursh flower plants. The method is to plant gaillardia aristata pursh in oil-contaminated soil. When the total petroleum hydrocarbon concentration of the soil is 10,000mg / kg, the growth amount of the plants is not inhibited basically, and the gaillardia aristata pursh can effectively degrade the total petroleum hydrocarbon in the oil-contaminated soil through the combined functions of the developed roots and root microbes to reduce the total petroleum hydrocarbon content in the contaminated soil. When the gaillardia aristata pursh is planted for 90 days, the degradation rate of the total petroleum hydrocarbon content in the contaminated soil can reach 56.63 percent which is nearly 4 times a blank natural degradation rate which is 15.49 percent. This proves that the gaillardia aristata pursh has high oil contamination resistance and high total petroleum hydrocarbon degradation capability. Thus, the total petroleum hydrocarbon in soil can be effectively removed by planting the gaillardia aristata pursh in the oil-contaminated soil, and removing all plants and well treating the plants in a centralized manner after the plants are mature.

The present invention discloses a reusing treatment method for printing and dyeing wastewater. The innovation point is that the method comprises the following step: sequentially feeding the printing and dyeing wastewater into an adjusting pool, a coagulative precipitation tank, a compound aerating activated sludge reaction tank, a hydrolysis acidification pool, a contact oxidation pool, a secondary sedimentation tank, a membrane biological reaction tank and a reverse osmosis reaction tank for recovery processing. The reusing treatment method for printing and dyeing wastewater disclosed by the present invention guarantees stable operation of an advanced treatment system, particularly a reverse osmosis system. Pretreatment by a set coagulating sedimentation process is necessary. The wastewater is purified in the coagulative precipitation tank, and the pollution concentration of effluent is greatly reduced, so that the operation load of subsequent biochemical treatment facilities can be alleviated. An MBR process is added based on conventional secondary bio-treatment, and the quality of the discharging effluent is greatly improved through an efficient interception effect of a membrane on suspended solids and organic matters in the wastewater, so that the recovery of the wastewater by virtue of the reverse osmosis treatment is relatively reliable.

The invention discloses an air inlet flow control method and device, and an air treating device. The air inlet flow control method comprises the following steps that the pollution ingredients in indoor air and the pollution concentrations of the pollution ingredients are obtained; and the air inlet flow of the air treating device is adjusted according to the pollution ingredients and the pollutionconcentrations so as to improve the air quality of the indoor air. According to the technical scheme, the health and comfort of the air treating device are improved.

The invention discloses a system and a method for separating and treating the pollutant sources of a large-scale pig farm. The system comprises a pollutant source separation hog house, an excrement conveying device, an excrement fermenting device, a liquid conveying device, a fecaluria liquid fermenting device, a fence washing water SBR reactor and an ecological wetland, wherein the pollutant source separation hog house adopts the structure that short beams running through the whole hog house in the length direction are established in a hogcote, transverse beams and longitudinal beams are established between the short beams, a slatted floor is paved on the transverse beams and the longitudinal beams, every two short beams and a V-shaped bottom surface form a U-shaped excrement groove, the higher ends of the U-shaped excrement grooves are connected to an excrement collection pool, the lower ends of the U-shaped excrement grooves are connected to a liquid collection pool, and an excrement scrapping system is arranged in each U-shaped excrement groove. The separation of fecaluria from rainwater, drinking residual water and fence washing water and the separation of excrement from fecaluria liquid in advance are realized, so that the problem of difficult solid-liquid separation in subsequent procedures is solved, and the resource utilization and pollution treatment effect is good.

The invention provides a method for recovering acid-heavy metal contaminated soil. The method includes the steps that biological activated carbon base fertilizer is applied to the acid-heavy metal contaminated soil, mixed evenly and aged; after aging is finished, earthworms are placed in the soil to be cultured, and castor oil plants are planted and completely removed after fruits of the castor oil plants are harvested; after the castor oil plants are completely removed, earthworms are placed in the soil to be cultured again; after the earthworms are introduced into the soil normally, willows are planted, and the willows are completely removed after a period of time; the steps mentioned above are cyclically and repeatedly executed till the content of heavy metal in the soil reaches the safety standard. The method for recovering the acid-heavy metal contaminated soil has the extremely remarkable beneficial effects that a restoration period is short and the soil cannot be secondarily contaminated.

The invention discloses a method for synchronously removing and stepwise recovering sulfoacid dye and heavy metal ion through resin, and belongs to the field of resourceful treatment of dye-heavy-metal composite wastewater. The method comprises the following steps: (1) synchronous absorbing: adjusting the pH (Potential of Hydrogen) of the composite wastewater containing sulfoacid dye and heavy metal ion to 3 to 6, and then pumping the composite wastewater into an adsorption column filled by absorption resin; (2) recovery of heavy ion: desorbing the absorption resin through common inorganic acid desorption solvent at the first time after accomplishing step (1), and stopping the first desorption after no heavy ion is inspected in the output water; and (3) recovery of dye: desorbing the absorption resin through common inorganic alkali desorption solvent at the second time after accomplishing step (2), wherein the completely reproduced resin can be recycled after being washed to reach neutral by clean water. By adopting the method, the pollution concentration of the sulfoacid dye and heavy metal ion can be greatly reduced, and high-purity sulfoacid dye and high-purity heavy metal ion can be stepwise recovered and can be applied to resource reclamation.

The invention discloses a formaldehyde remover and a safe removal method of formaldehyde pollution in a newly decorated classroom. The formaldehyde remover comprises 20-60 parts of tea extract, 20-60 parts of grape seed extract, 1-5 parts of sodium dodecylsulfate, 1-10 parts of dispersing agent, 0-100 parts of nano negative ion powder, 0-400 parts of water-based polyurethane resin and 958-365 parts of water. The invention also discloses a safe removal method of formaldehyde in a newly decorated classroom. The method comprises the following steps: spraying the specific-formula formaldehyde remover according to the air-wall-desk and chair-carpet-curtain sequence; and after finishing spray, closing the doors and windows, keeping the indoor space closed for 20-40 minutes, and ventilating. After being used for treating the newly decorated classroom, the formaldehyde remover can efficiently remove formaldehyde and remove the peculiar smell pollution, is capable of continuously releasing negative ions beneficial to the human body, effectively lowers the PM2.5 and other pollutants in the classroom, and is safe with no residue.

The invention relates to the field of plant remediation technology for soil contaminated by PAHs, specifically to a remediation method for soil contaminated by PAHs by using the gramineous plant Festuca arundinacea. The gramineous plant Festuca arundinacea is planted in soil contaminated by PAHs; in the process of germination, growth and maturation of the plant, PAHs in the soil are degraded, removed or substantially reduced through combined action of the growth process and root exudates of the plant. According to the method, the ornamental plant Festuca arundinacea is planted in the soil contaminated by PAHs for remediation of the soil contaminated by PAHs; compared with a traditional contaminated soil treatment method, the method provided by the invention has the advantages of small investment, small work amount, low technical requirements, etc. Moreover, as Festuca arundinacea is an ornamental and economic plant, planting of Festuca arundinacea enables PAHs contamination in environmental soil to be effectively degraded and contaminated plants not to enter into a food chain, thereby utmostly reducing ecological risks caused by treatment of the contaminated soil.

The invention provides an MBR integrated device for relieving membrane pollution. The MBR integrated device has the advantages that a settling tank and sludge backflow are not required to be additionally arranged on the device, and only a settling area is required to be additionally arranged inside a biological reaction tank, that is, the settling tank is arranged inside the biological reaction tank; sludge is effectively intercepted through a honeycomb inclined plate tube in the settling tank and flows back into the biological reaction tank, so that the high sludge concentration and the high processing capacity of the biological reaction tank can be effectively ensured; moreover, the quantity of the sludge flowing into a membrane tank is reduced, so that the membrane pollution is relived; and clear water in the membrane tank can be used for regular medicine washing, so that the running cost is reduced in the practical operation, and the land use space is saved.

The invention belongs to the field of sewage treatment, and particularly relates to a treatment process for hydrazine hydrate wastewater. The treatment process comprises the following steps: enablingwastewater to sequentially pass through a collection tank, an evaporation system, a catalytic reaction tank, a multi-medium filter, an ultrafiltration system, a reverse osmosis system and an oxidationtank, discharging or recycling the wastewater after the wastewater reaches the standard, enabling reverse osmosis concentrated water to pass through an ion exchange system to adsorb a catalyst and regenerate, and allowing catalyst-containing regenerated liquid to flow back to a catalytic reaction tank so as to realize cyclic utilization of the catalyst. On the premise that salt, CODcr and NH3-N in hydrazine hydrate wastewater are effectively removed and effluent meets first-grade standard requirements prescibed in Integrated Wastewater Discharge Standard (GB 8978-1996), the dosage of chemicals is greatly reduced.

The invention relates to a road charging method considering traffic emission exposure of travelers and residents, and belongs to the technical field of traffic management. The method comprises the following steps: S1, selecting a road network, and determining OD pairs and traffic demand in the road network; s2, estimating the traffic emission pollutant concentration by using the integrated model; s3, quantifying traffic emission exposure of travelers and non-travelers; s4, constructing three road toll models with different management purposes based on the perspective of traffic managers; and S5, acquiring a charging standard of each road section in the road network, a travel path selection condition and traffic emission exposure conditions of travelers and non-travelers under different management purposes. According to the method, different road network flow distribution schemes and change conditions of traffic emission exposure of travelers and non-travelers are obtained by analyzing the road charging schemes under three different management purposes, and the research results can provide reliable theoretical basis and reference methods for a traffic management part when the road charging schemes are formulated.

The invention belongs to the technical field of energy-saving processes for circulation water for processing production and cleaning systems of tuber crops and particularly relates to a water circulation system for processing of tuber crops. The system is characterized by comprising a water tank, wherein a water pump is arranged in the water tank and communicated with a stone removal device, the stone removal device is communicated with a cleaning machine, the cleaning machine is communicated with at least one vibrating sieve connected and communicated in series, and a terminal vibrating sieveis communicated with the water tank. Each vibrating sieve comprises a support, a water channel is arranged below the support, spring support devices are fixed on the support, a sieve frame is connected to the spring support devices, a sieve is connected to the sieve frame, waterproof fences are arranged on the periphery of the sieve frame, a residue outlet is formed in one waterproof fence, and the sieve frame is connected with a water distributing device. Water resources are saved, the water changing time can be prolonged, the pressure of a sewage treatment station is reduced, impurities insewage have been screened out, the sewage treatment difficulty is reduced and the treatment time can be saved.

The invention relates to the technical field of printed circuit board processing, and particularly relates to a method for constructing an environmentally-friendly water-saving gum residue-removing electroless copper deposition line. According to the chemical characteristics of each chemical treatment cylinder, each of the different chemical characteristics or the same chemical characteristics adopts the principle that the same kind of acidic water washing and acidic water washing overflows are combined, the alkaline water washing and alkaline water washing overflows are combined, and the acidic water washing and the alkaline water washing are neutralized mutually, so that the pollution concentration of the water quality of sewage water can be effectively reduced, the problem of large water consumption and large sewage discharge amount can be effectively solved, the environmental pollutions can be reduced, and meanwhile, the role of protecting chemical potions in the latter stage through pre-impregnation can be played, the addition amount of chemical treatment potions can be reduced, and the stability and product quality of the chemical treatment potions can be improved; the chemical treatment potions are very stable, and the phenomenon of poor backlight of electroless copper deposition that is most easily caused by unclean gum removal and the pollution of other treatment stations can be completely solved; and the method is environmentally-friendly and economical, and also improves the quality of products.

The invention relates to a ventilation device for a blood disease patient ward. The ventilation device comprises a ward, a sickbed arranged in the ward, an air supply mechanism and an air exhaust mechanism, wherein the air supply mechanism comprises a first air supply outlet and a third air supply outlet which are formed in the top end of the ward, and a second air supply outlet and a fourth air supply outlet which are formed in the side wall of the ward, air supply assemblies are arranged on the first air supply outlet, the second air supply outlet, the third air supply outlet and the fourthair supply outlet, the air exhaust mechanism comprises a first air exhaust opening and a second air exhaust opening which are formed in the bottom of the ward, and air exhaust assemblies are arrangedon the first air exhaust opening and the second air exhaust opening. According to the ventilation device, the combined air supply mechanism and the air exhaust mechanism are adopted, indoor air flow is improved, a pollution source is located at the position close to the air exhaust openings, meanwhile, induced air flow is formed between the air supply openings and the air exhaust openings, indoorpolluted air can be removed easily, medical staff can be better protected, and the induced air flow formed by air supply can be used for conveying polluted air to the air exhaust openings to remove polluted air.

The invention discloses an intelligent smoke removal electronic control system of an ashtray. The system comprises a particle concentration sensor, a single chip microcomputer controller, an electromagnetic relay group, an anion generator group, a state indicator lamp and a power supply. The invention also discloses a control method of the intelligent smoke removal electronic control system of theashtray. According to the pollution concentration of particles in the environment, the working load and working time of anion generators are automatically controlled, and the pollution state of the particles in the environment is displayed in real time, so that the aims of quickly reducing the concentration of smoke dust in a smoking process and purifying air are achieved, and the good effects ofefficiently saving energy and intelligently removing smoke are achieved.

The invention provides an external air monitoring device which comprises a fixing block and a fixing column. A particle collecting body is of a cylindrical hollow structure, twelve air inlets are formed in the top of the outer end face of the particle collecting body, the air inlets are communicated with the interior of the particle collecting body, ten air outlets are formed in the bottom of theouter end face of the particle collecting body, the air outlets are communicated with the interior of the particle collecting body, the top of a top cover supporting column is installed on the end face of the bottom of a waterproof top cover, the bottom of the top cover supporting column is installed at the end face of the top of the particle collecting body, a particle collecting block is of a drawer type structure, a handle is installed on the particle collecting block, particles stopped inside the device are gathered and collected, and in the later period, a special device is used for detecting the collected particles, the characteristics and source places of the particles are judged, the places where the particles are generated are governed centrally, the particle discharge amount in air is lowered, and the air quality is improved.

Methods and systems for purging an aircraft cabin and providing a safe reentry indication. Methods and systems are described for purging an aircraft cabin and providing an indication to provide a confidence that post-operation reentry into the cabin is safe. These methods and systems are based on utilizing outside air and / or filtered air to reduce the concentration of infectious agents inside the cabin. In some examples, a certain approach is performed after occurrence of a certain contamination event (e.g., the presence of a patient in flight) and / or as part of a periodic service (e.g., between two flights). The amount of time the system operates to introduce the compound into the nacelle is specifically calculated to reduce the proportion of remaining infectious agents below a desired level to reduce the initial concentration of the contaminant concentration within the nacelle. The purge duration is dependent on the nacelle volume and the intake air flow rate. For example, after 9 minutes of flow of the introduced air with 20 ventilations per hour, the remaining air proportion will be less than 5%.

The invention provides a petroleum hydrocarbon contaminated soil remediation method based on sodium percarbonate. The principle is as follows: a catechol ferrous complex is added into pretreated soil; the complexed ferrous ions can catalyze hydrogen peroxide released by sodium percarbonate to form Fenton reaction so as to remove petroleum hydrocarbon; H< + > generated in an aqueous solution and in the petroleum hydrocarbon degradation process can react with CO<3><2-> to generate CO2 and neutralize with OH <-> generated in the Fenton reaction to generate water, only catechol salt and Tween 80are reserved in the soil, Tween 80 is easy to biodegrade, and green and environment-friendly remediation of the contaminated soil is achieved.

The invention discloses a treatment device for Cr6+-containing contaminated soil. The treatment device comprises a wet type vibratory sorting machine, a hydrocyclone I, a stirrer, a hydrocyclone II and a vibratory water removal device. The wet type vibratory sorting machine is connected with the hydrocyclone I through a conveying pipeline. The hydrocyclone I is connected with the hydrocyclone II through the stirrer. The hydrocyclone II is connected with the vibratory water removal device. The hydrocyclone I and the hydrocyclone II are both connected with a pressure filtering machine through a settling tank. The vibratory water removal device is sequentially connected with a primary stirring machine and a secondary stirring machine. The wet type vibratory sorting machine is connected with a make-up water storage tank through a water pipe. The invention further discloses a treatment method for the Cr6+-containing contaminated soil, the composite technology of soil washing, chemical reduction and fixation is selected, the economical and effective soil purification conditions are adopted, and effective soil purification is achieved.

The invention relates to a treatment system for removing heavy metals in wastewater. The system comprises a heavy metal reaction tank (1), a solid-liquid separation tank (2), an anaerobic biological reaction tank (3) and a degassing tower (4) which are circularly connected, the system further comprises a gas storage tank (5) connected with the degassing tower (4) and a membrane tank (6) circularly connected with the anaerobic biological reaction tank (3), and the membrane tank (6) is connected with the gas storage tank (5) and the degassing tower (4). The heavy metal reaction tank (1) is provided with a wastewater inlet for introducing heavy metal-containing wastewater, an alkali liquor inlet for introducing an absorption liquid in the degassing tower (4) and a reaction liquid outlet for introducing a reaction liquid into the solid-liquid separation tank (2). Compared with the prior art, the method has the advantages that addition of sulfide is avoided, and heavy metal and organic matter COD are removed at the same time.

The invention aims to provide a skid-mounted type heat energy circulation combination device. According to the technical scheme, the skid-mounted type heat energy circulation combination device comprises a skid-mounted frame, two insulation buffer tanks, a booster pump, a control box, a filter, a purification input pipe, a purification output pipe and a constant-temperature storage tank. Each insulation buffer tank is provided with a liquid coming pipeline and a liquid coming conveying valve. The filter comprises a sewage accumulation tank, a purification storage tank, a liquid coming purification valve and two sewage discharge pipes. The skid-mounted frame is provided with a plurality of hanging rings. The mechanism is a combination device, skid-mounted type structural design is adopted,overall circulation mechanism transport, packaging and installation can be convenient, insulation of liquid heat can be conducted effectively, purification filtration is conducted, quality of the liquid heat energy is ensured, and heat energy circulation and recycling are achieved. The whole skid-mounted type heat energy circulation combination device is clear in structural thinking, simple and convenient to operate, full-sealed type structural design is adopted, thus the circulation effect is better, environment protection is achieved, service life is long, work efficiency is improved, and operation cost of enterprises is lowered.