The present invention discloses a crystallization purification separation process of 2,4-dichloro-3,5-dimethylphenol. The crystallization purification separation process comprises: preparing a reaction liquid, wherein the content of the active substance 2,4-dichloro-3,5-dimethylphenol in the reaction liquid is more than 75%; neutralizing the reaction liquid, wherein the pH value of the reaction liquid is adjusted to 9-10 with a 10% sodium carbonate solution; carrying out phase splitting, wherein the neutralized reaction liquid is subjected t phase splitting so as to separate an oil phase A and a water phase A; carrying out heat exchange, wherein the oil phase A is heated to a temperature of 85-95 DEG C; and crystallizing, wherein the oil phase A being subjected to heat exchange is crystallized to obtain the finished product. According to the present invention, the process is smooth, the operation is simple, and the labor intensity of the operator is reduced; the light component A, the light component B and the crude product obtained in the crystallization process can be recycled, cannot be decomposed, cannot cause environmental pollution; the raw material utilization rate is high, and the organic tar waste cannot be generated; and the process further has advantages of environmental protection, high product yield, and production cost reducing.

Crystallization purification separation process of 2,4-dichloro-3,5-dimethylphenol

The invention discloses a method and a system for treating black water of green buildings. The method comprises the following steps: collecting domestic sewage treated by using a digestion tank; introducing the domestic sewage into a biological trickling filter, and carrying out primary treatment; and finally, conveying effluent obtained by virtue of the primary treatment to plant regions of the green building, and irrigating the plants. According to the method, different sewage treatment processes are organically combined and used, the setting of the method is reasonable, chemical substances are not additionally input in a treatment process, the sewage treatment is finished by virtue of a biological purification method, and the sewage is used as irrigation water for irrigating the plant regions of the buildings, so that the circulating utilization of the domestic sewage in a building system is realized, and the environment protection effect is good; and the method has a good application prospect.

Method and system for treating black water of green buildings

The invention discloses a biological treatment method t of high-salinity wastewater containing DCMX (2,4-dichloro-3,5-dimethylphenol) The method comprises steps as follows: (1) screening, domestication and identification: microorganisms obtained through screening in the high-salinity wastewater containing DCMX is subjected to salinity acclimation through DCMX, and screened strains are biologically identified; (2) degradation: DCMX degradation is performed in a dark place The degradation rate of DCMX can be 80% or above The problem that the actual treatment effect on low-concentration DCMX is poor with physical and chemical methods is solved; besides, the problem that the treatment effect on DCMX-containing wastewater is poor under the high-salinity condition with a biological method is solved Moreover, the method has the characteristics of being efficient, simple, easy, lower in cost, environment-friendly and the like and has great significance in environment protection, resource saving and cost saving

Biological treatment method of high-salinity wastewater containing DCMX (2,4-dichloro-3,5-dimethylphenol)

The invention relates to an integrated multi-medium soil technology reactor, and a sewage processing method thereof. A reactor main body of the integrated multi-medium soil technology reactor comprises an inner soil percolation reaction zone and an outer multi-medium soil layer technology reaction zone; a concentric cylinder structure is formed by the inner soil percolation reaction zone and the outer multi-medium soil layer technology reaction zone; the bottoms of the inner soil percolation reaction zone and the outer multi-medium soil layer technology reaction zone are provided with a supporting layer; an aeration device is arranged on the supporting layer; a filling material in the inner soil percolation reaction zone is composed of iron filling doped zeolite; the outer multi-medium soil layer technology reaction zone comprises water layers and soil layers; the water layers are composed of zeolite; the soil layers are composed of common sand, straw, charcoal, and iron filings; the surfaces of the soil layers are covered with coarse sand; and the water layers and the soil layers are arranged alternatively from bottom to top. According to the integrated multi-medium soil technology reactor and the sewage processing method thereof, double layer reaction zone structure optimization is adopted, so that a good aerobiotic/anaerobic environment is constructed in the system, and nitrogen and phosphorus removal process is enhanced.

Integrated multi-medium soil technology reactor, and sewage processing method thereof

The invention belongs to the field of organic fine synthesis, and relates to a method of synthesizing 4-chloro-3,5-xylenol in a continuous flow microtubule reactor. The method is that in a microtubule reactor with a certain controlled temperature, raw materials of 3,5-xylenol, a hydrochloric acid solution of copper chloride and hydrogen peroxide are simultaneously and continuously introduced in proportion to prepare the 4-chloro-3,5-xylenol. The method is simple and effects are good. Compared with conventional methods, the method changes batch reactions to continuous reactions and shorten the reaction time from a plurality of hours to about a hundred seconds.

Method of synthesizing 4-chloro-3,5-xylenol in continuous flow microtubule reactor

The invention discloses a method for treating 2, 4-dichloro-3, 5-dimethylphenol (DCMX) waste water. The method comprises the following steps: (1) extracting DCMX: acidifying DCMX waste water, then adding a complexing extraction agent tributyl phosphate-kerosene, uniformly stirring, carrying out the extraction, extracting the DCMX into an organic phase, after the extraction is ended, standing, carrying out the layering to obtain the organic phase containing the DCMX; (2) re-extracting and recovering DCMX: adding sodium hydroxide into the organic phase containing the DCMX, converting the DCMX to sodium salt of the DCMX, transferring the sodium salt of the DCMX into a water phase from the organic phase, and recovering the pure sodium salt solution of DCMX. By adopting the method, more than 82 percent of DCMX in the waste liquid can be recovered, the waste of resources in avoided, an extraction agent can be recycled, and fewer agents are consumed. The method has advantages of high treatment efficiency, simplicity in operation, moderate conditions, easiness in control and the like; moreover, the extraction agent can be reused, so that the cost is reduced, and the sodium salt of the DCMX in the waste water also can be used as a resource to be recycled.

Extraction treatment method for 2, 4-dichloro-3, 5-dimethylphenol waste water

The invention belongs to the field of distributed treatment of sanitary sewage, and relates to a sewage treatment system with separate nitrification and denitrification phases. The sewage treatment system comprises a front-section vertical flow biological trickling system and a rear-section horizontal flow multi-medium soil infiltration system arranged below the front section, wherein the front section comprises a water distribution gravel layer, a natural zeolite packing layer, a drainage gravel layer and a drainage false floor. The rear section comprises a rear-section intake pond, an intake grating, a water distribution gravel layer, a natural zeolite infiltration layer, a soil template layer, a sealing soil layer, a drainage gravel layer, a drainage grating, a rear-section delivery tank and a delivery tank water outlet; the vertical interval of the front section and the rear-section intake pond is 30-50cm. Compared with the traditional two-stage multi-medium soil infiltration system, the rear section of the system adopts a horizontal flow method, the hydraulic retention time is effectively improved, the effluent is submerged by the horizontal flow, the anaerobic environment is improved, and total nitrogen removal is facilitated. Therefore, the system is ideal in overall treatment effect, not easy to block, and low in construction and operation costs.

Sewage treatment system employing vertical flow biological trickling and horizontal flow multi-medium soil infiltration

The invention relates to the technical field of wastewater purification, and especially relates to an adsorbent for Pb (II) ions in wastewater. The adsorbent is used by using a biomembrane residual on a filler after the removal of volatile organic matters from a biotrickling filter. The application of the adsorbent for Pb (II) ions in wastewater comprises the following steps: putting the adsorbent in wastewater containing Pb (II) ions, adsorbing under a certain pH value at a certain temperature for a certain time, filtering after the adsorption, adjusting the obtained filtrate to neutrality, and discharging. The adsorbent for Pb (II) ions in wastewater has the advantages of high adsorption capacity, direct filtration removal after the adsorption process, low cost, and simple process, and can be directly filtered and separated from water after the use, can be burned or further processed, and is of great significance to solve the environmental pollution and promote waste recycling.

Preparation method and application of adsorbent for Pb (II) ions in wastewater

The present invention belongs to the technical field of biological filtration of volatile organic waste gas, and discloses a reinforced removing method for hydrophobic n-hexane in waste gas through a biological drop filter. According to the method, active sludge in sewage treatment plant oxidation ditch is used to inoculate a biological drop filter, low concentration n-hexane gas is used to carry out acclimation on microorganisms in the device, the n-hexane concentration is increased to a certain range after the successful acclimation, and an anionic surfactant sodium dodecyl sulfate (SDS) is added to a nutrition solution, wherein the solubilization effect of the surfactant is used to promote the mass transfer process of the hydrophobic organic pollutants between the gas and the liquid or between the gas and the biological membrane so as to enhance the bioavailability of the hydrophobic organic waste gas and improve the degradation efficiency. According to the present invention, in the case of no change of the biological drop filter device and the operation conditions thereof, the degradation efficiency of the biological drop filter on the hydrophobic n-hexane in the waste gas can be improved, and characteristics of low operating cost, simple operation, environmental protection, easy operation and maintenance, and the like.

Reinforced removing method for hydrophobic n-hexane in waste gas through biological drop filter

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