535results about How to "Stabilization" patented technology

The invention discloses an ultrafiltration membrane chemical cleaning method and aims at an ultrafiltration membrane that is used for processing purified PTA waste water. The invention uses an acid lotion prepared by citric acid and sodium bisulfite for dissolving and eluting inorganic pollutants that are formed by cobalt and manganese ion hydroxide, deposited and absorbed on the surface of the ultrafiltration membrane, and uses an alkaline oxidative lotion that contains sodium hypochlorite for dissolving and eluting organic colloid pollutants that are deposited and absorbed on the surface of the ultrafiltration membrane. The ultrafiltration membrane chemical cleaning method can effectively elute the pollutants, recover the running flux and running pressure of the ultrafiltration membrane, and ensure stable running of the purified PTA waste water in an ultrafiltration process.

The invention relates to a two-stage countercurrent washing medicament addition stabilization combined restoration method of chromium polluted soil, comprising the following steps of: (1) pouring polluted soil into fist-stage washing equipment, stirring and washing the soil with a liquid-to-solid ratio of 10:1 and then carrying out solid-liquid separation; filling separated waste water into a water treatment system, and pouring dewatered soil into second-stage washing equipment; (2) using clearing water which is treated by the water treatment system and reaches the standard as the water of the second-stage washing equipment, stirring and washing the dewatered soil with a liquid-to-solid ratio of 10:1 and then carrying out solid-liquid separation; sending separated washing liquid to the first-stage washing equipment for recycling; (3) adding FeSO4 to the soil after second-stage washing to carry out stabilization treatment, wherein the addition quantity of the FeSO4 is 1-5 percent of the soil to further reduce the content of Cr6 in the soil and reduce the pH to 6-9 meanwhile; and (4) directly backfilling the stabilized soil. The invention has the advantages of thorough elimination of hexavalent chromium pollution, low price and easy obtain of medicaments, environmental security, use function recovery of restored soil, and the like.

A recycling treatment method for feces and wastewater in a large-scale livestock and poultry breeding farm includes the following steps: (1) pre-treating the feces and wastewater in the large-scale livestock and poultry breeding farm in a pretreatment unit to form slurry; (2) feeding the slurry into an energy recovery unit, and performing solid anaerobic digestion in a solid anaerobic reactor to obtain an energy gas, methane; (3) performing solid-liquid separation to the digested slurry to generate wastewater, which is then fed into a UASB reactor to perform further anaerobic fermentation to remove organic pollutants from the wastewater; (4) feeding the treated wastewater into a nitrogen and phosphorus removal unit to perform nitrogen and phosphorus removal treatment; (5) separating and purifying a precipitate, which is generated in the nitrogen and phosphorus removal unit and mainly includes magnesium ammonium phosphate, to obtain an organic fertilizer additive, wherein the nitrogen removal process is autotrophic nitrogen removal and can reduce aeration quantity by 62.5% without addition of any carbon sources, thus saving large quantity of operation cost; and (6) feeding the treated wastewater into a deep-treatment unit to remove bio-refractory substances and disinfect the wastewater so as to finally reach emission and recovery standards of wastewater.

The invention discloses a high-efficiency clean resource utilization method for quadratic aluminum dust. The method comprises the following steps: performing low-temperature roasting treatment on quadratic aluminum dust, removing harmful elements such as nitrogen, carbon and fluorine, pulping, washing, desalting and dehydrating the quadratic aluminum dust, removing sodium salt, potassium salt andother impurity components, washing brine and evaporating and crystallizing by utilizing flue gas waste heat. The purified quadratic aluminum dust can serve as a raw material to be directly utilized, and after the quadratic aluminum dust is mechanically mixed with auxiliary materials (calcium-based, silicon-based and magnesium-based), an aluminum based inorganic material is prepared at a high temperature, and the sintering exhaust gas realizes up-to-standard discharge by virtue of dust removal and dry defluorinated purification. According to the technology in the invention, the quadratic aluminum dust can be safely, cleanly and efficiently treated and converted into the high-value aluminum based inorganic material to the greatest degree, and environmental-friendly treatment and high-value resource utilization of the quadratic aluminum dust can be realized.

The method discloses a method for treating wastewater generated during the production of acrylic fibers. The method is to treat comprehensive wastewater generated during the production of acrylic fibers taking acrylonitrile as a first monomer by steps of uniform settlement, pH value adjustment, aerobic biochemical treatment and flocculation precipitation. The method adds iron ions, magnesian ion, calcium ion and other metallic ions during the biochemical treatment to react the ions with cyanogens, nitrile, amine and other substances in the wastewater to form chelate complexs, thereby preventing the substances form damaging enzymes of microorganisms, solving the problem of chelating poisoning of microorganisms during water treatment, improving activities of microorganisms and wastewater treatment effect, shortening treatment process, reducing treatment cost and having the characteristics of simpleness, practicality, stable treatment effect, high removal efficiency and wide application range, etc.

The invention provides a low-temperature liquefied natural gas (liquefied natural gas) in a boil-off gas (boil-off gas, BOG) transport storage tank. Apparatus for reliquefaction of liquefied natural gas vapors, comprising a compressor for compressing methane in a storage tank for liquefied natural gas, a condenser for at least partial condensing of the methane compressed by the compressor, and nitrogen cycle equipment to supply heat and cold to the compressor from condensation The reliquefied vapor is returned from the compressor to the storage tank, and the vapor gas is compressed by the compressor in the pre-cooled condenser, so the advantage is that the temperature of the reliquefied vapor is maintained within a preset range even if the quantity or temperature of the reliquefied vapor changes. Further, the present invention incorporates a cooling device constituting a low temperature section in the device for reliquefied LNG in order to reduce the size of the device for reliquefied LNG and stably process a low temperature range of nitrogen gas without cold heat loss.

This heater is provided with: a long base section (11); a resistance heating wiring section (15) formed on the surface of the base section (11) or inside the base section (11), and formed in a state of electrical insulation from said base section, said resistance heating wiring section (15) having multiple parallel wires that electrically heat; and at least two power supply terminal sections (17) that, to supply power to the resistance heating wiring section (15), electrically connect one terminal section (17) and the other terminal section (17) via the resistance heating wiring section (15). The resistance heating wiring section (15) contains a material with a temperature coefficient of resistance of between 500 and 4,400 ppm/ DEG C, and the parallel wires contain a sloping rectangular pattern.

The invention relates to a ferro-manganese composite oxide catalyst and a preparation method thereof. The ferro-manganese composite oxide catalyst is granular and is prepared by calcining polyvinyl alcohol, sodium dodecyl benzene sulfonate (SDBS), ferrous sulfate, sodium carbonate and natural ferro-manganese ore after reaction. The catalyst can be used for advanced degradation of papermaking wastewater after biochemical treatment. The catalyst disclosed by the invention is changed to ferro-manganese composite oxide particles from conventional ferrous sulfate, can be reused after calcination, is low in chemical sludge output, can save sludge treatment cost, can reduce production of secondary pollution, and can easily realize solid-liquid separation.

The invention discloses a method for controlling an aeration biofilter of a sewage treatment plant. The method comprises the following steps of: S1, after performing data reconciliation and data mining on water quality index data by a data analysis module, transmitting the data to an intelligent control module; S2, generating an optimizing strategy by the intelligent control module, and transmitting the optimizing strategy to a control command module; S3, translating to form a control command by the control command module, and sending the control command to a control device; S4, controlling running equipment by the control device, and sending a detection signal to detection equipment by the running equipment; and S5, acquiring new water quality index data by the detection equipment, transmitting the new water quality index data to a historical data operating module and a data analysis module, and returning the step S1. The invention also discloses a system for implementing the method for controlling the aeration biofilter of the sewage treatment plant. The method and the system for controlling the aeration biofilter of the sewage treatment plant are regulated according to requirements, have a stable process, save energy and reduce consumption and are low in manual control cost.

The invention relates to the field of sludge treatment, and in particular to a sludge vitrifaction curing treatment process which comprises the following steps: dehydrating and drying sludge in sequence so as to reduce the water content of sludge; crushing and grinding the dried sludge till the crushed sludge can pass through the 100-mesh screen; sufficiently mixing the grinded sludge with silicate powder according to a mass ratio of 1:0.5 at the temperature of 25-50 DEG C at the rotation speed of 2400 r/min, so as to obtain mixed powder; performing high-temperature calcination on the mixed powder at 1700 DEG C to completely carbonize and decompose organisms in the sludge, and finally molding the residual inorganic substances into glass solid granules. By the adoption of the sludge vitrifaction curing treatment process, harmful substances such as heavy metals and arsenide which are hard to carbonize or decompose can be fixed in the glass solid granules. The result of a toxicity leaching test on a glass solid granule sample according to GB5805.3-2007 shows that the national environment-friendly requirements can be met, and the glass solid granule sample can be directly buried. The process provided by the invention requires lowly on sources of sludge and components of pollutant in the sludge, and is applicable to various types of sludge; harmlessness, reduction and stabilization treatment on sludge can be achieved.

The invention discloses a washing softening technology for MSWI (Municipal Solid Waste Incineration) fly ash. The technology comprises the following steps of performing primary washing on the fly ash; performing primary centrifugal dewatering on the washed fly ash after the washing operation is completed; adding a PAM (Polyacrylamide) solution into the separated filter liquor and uniformly blending; feeding the mixture into a first-level centrifugal machine B for performing secondary centrifugal dewatering; feeding the filter liquor separated from the first-level centrifugal machine B into a decalcified centrifugal machine for centrifuging after the filter liquor is subjected to hardness coarse-adjustment and heavy metal removal treatment; finely adjusting the hardness of the filter liquor separated from the decalcified centrifugal machine, sequentially precipitating and filtering the filter liquor, and adjusting the PH value of the filter liquor to be 7-8; finally feeding the filter liquor to an MVR (Mechanical vapor recompression) evaporator. According to the washing softening technology for the MSWI (Municipal Solid Waste Incineration) fly ash, the washing treatment effect is good, and the effluent quality is stable; a filter cake separated from the decalcified centrifugal machine is mixed with the filter liquor discharged by a second-level centrifugal machine A, and then the mixture is subjected to subsequent treatment, so that the mixture can be washed twice again, therefore the content of chloride ions in the filter cake is smaller than 0.5%, and the problem of high chlorine content in the filter cake is solved, and the cement quality is guaranteed.

Disclosed are a method for processing rubbish percolating water and its system. The processing technique realizes the procession by combining the procession, biological processing technology and ecological procession. The system mainly comprises of adjusting pool, biological coagulation pool, high effective biological filtration pool, comprehensive ecological pool and so on. Compared with the present technology, it has rapid processing speed, high quality of water processed which can reach the first-class drainage standard, and can realize naugh drainage of waste water in rubbish processing factory.

The invention relates to a stabilization treatment method for heavy metal, in particular to a P-alkalinity displaying stabilization treatment method for heavy metal containing heavy metal dust. Alkaline reagents and heavy metal fixing agents are added and mixed. The invention provides a stable and long-term treatment method for heavy metal containing heavy metal dust; in a test method of an acetic acid buffer solution method according to a People's Republic of China (PRC) HJT 300-2007 solid waste leaching toxicity leaching method, a standard value of household refuse landfill pollution control standard GB16889-2008 can be stably reached, the cost is low, and the environmental load can be lightened.

The invention discloses a liquid steel magnesium treatment process for ship plate steel and belongs to the field of clean steel smelting. The process comprises the following steps that firstly, the station and time for magnesium treatment are determined, wherein Mg-Al-Fe alloy core-spun yarn is added after an LF procedure alloy is slightly adjusted or after RH procedure vacuum treatment is carried out; secondly, according to the content of acid dissolved aluminum in steel, on the premise of guaranteeing the magnesium treatment effect of the Mg-Al-Fe alloy core-spun yarn, the aluminum feeding amount and the magnesium treatment wire feeding amount are coordinately configured; and next, magnesium treatment is carried out, wherein in the LF or RH procedure, a core-spun yarn feeding method is adopted to add the Mg-Al-Fe alloy core-spun yarn into liquid steel of the ship plate steel, and finally, the finished product liquid steel is obtained. The liquid steel magnesium treatment process for the ship plate aluminum deoxidizing steel is applied to the ship plate steel refining process, and the cleanliness of the ship plate steel and the ingredients, number, particle size and distribution of inclusions in the steel can be controlled; and by means of the method, the cleanliness of the ship plate steel and the control level of nonmetallic inclusions are improved, and therefore the mechanical performance and the stability of the ship plate steel are improved.

The invention discloses a landfill leachate treatment process system and method. The method includes the process steps: (1) enabling landfill leachate to automatically flow into a regulating tank andhomogenizing water in the regulating tank; (2) enabling waste water in the regulating tank to automatically flow into a coagulative precipitation tank; (3) enabling coagulative precipitation effluentto automatically flow into a three-dimensional electrolytic tank and performing oxidizing reaction on organic pollutants in the waste water; (4) adjusting the pH (potential of hydrogen) value of the waste water to be 6.8-7.2, enabling the waste water to be suitable for biochemical treatment, and then enabling the waste water to automatically flow into an A/O biochemical system; (5) setting three-dimensional electrolysis behind a biochemical system to take deep treatment measures. After the effluent is subjected to ultraviolet disinfection, various indexes can reach discharge standards. The system and the method have the advantages of high efficiency, economical efficiency, easiness in operation management and the like.

The present invention provides a method for treating waste liquid containing organic substances, which can treat waste liquid containing organic substances at high efficiency and high speed, produce not odor during the treatment, and obtain waste liquid containing organic substances that has water quality at least suitable for discharging to sewage system or public water areas; the present invention further provides a waste liquid treatment device, an additive for treatment of waste liquid containing organic substances, and bacteria that can decompose waste liquid containing organic substances. The method and device for treating waste liquid containing organic substances are characterized in: they can force activated sludge containing specific bacteria to contact with the waste liquid containing organic substances. The present invention further provides an additive that can be added to the active sludge in a treatment pond where specific bacteria exist to treat waste liquid containing organic substances, and specific bacteria that can decompose waste liquid containing organic substances.