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

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 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 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 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.