Comprehensive Treatment Of Dyeing Wastewater Containing Pva

Biodegradability of desizing wastewater PVA is minimal.BOD5/COD less than10%.Always this wastewater is discharged into the sewage treatment factories after mixed with other waste after printing section. Then current biochemical treatment is difficult to work.Resulting in waste water is difficult to achieve national emission standards.lt is difficult to degrade into water bodies.It accumulates in the environment.And the water becomes stank.Thal cause serious water pollution.In recent years, continued extensive research in nanotechnology. nano fiber membrane materials prepared by electrospinning technique has aroused great attention has also been systematically studied. Electrostatic spinning apparatus using high voltage electrostatic field generated tensile force to prepare a polymer solution or melt reliable way to fine fibers. The obtained fibers finer than conventional spinning method of fiber diameter, the diameter usually between ten nanometers to fifty microns. The resulting electrospun fibers were woven general shape, no rules piled up. a higher ratio of surface area and porosity, has broad application prospects in the filter material and carbon nanotubes, etc.This article develop a reasonable PVA quantitative measurement parameters through rational experiment.It compared the linear relationship between PVA and CODAnalysis the IR spectra of the PVA before and after the experiment.It shows that the experiment meet the purpose of the experiment reuse.It determine to use the hydrophobic PVDF ultrafiltration membrane as an experimental film by the test.We electrospin PVDF membrane. Studying various spinning conditions on the apparent performance of the spinning membrane.lt shown that the ideal conditions, is drawn in15KV, accepting distance10cm, the temperature is24～25℃, humidity48%, the number of the syringe4, the injection volume8ml, an injection speed of2.5ml/h, roller speed20r/min.The. Experiments show that ideal experimental spun PVDF membrane can be achieved and the requirements for commercial membrane performance.The flux increased slightly. Experiments provide new ideas for the new ultrafiltration membranes.Screening the commercial membrane by Ultrafiltration cup.Filtering effect of electro-spun fiber PVDF membranes by preliminary experimental tests.In order to found the electro-spun nanofiber PVDF membrane water flux.we test the operating pressure during the pulse, temperature factors.Analysis of its structure by electrospun nanofibers PVDF membrane SEM characterization.Recovery of1%PVA solution by electrostatically spun nanofiber membrane PVDF membrane concentration.Analyze the three factors produced of the operating pressure, the pulse cycle, the temperature at which.Comparison of PVA solution and pure water flux flux changes.Comparison of different time filter changes in the concentration of PVA water.The results show O.1MPa pulse and80℃is good to the actual conditions favorable to large experiments. Analysis of the commercial ultrafiltration membrane performance and parameters.Research membrane fouling and cleaning.. In order to increase the cleaning effect we use ultrasonic cleaning method.Study the membrane fouling resistance. We found that temperature40℃, the frequency of40kHz, power150W, the membrane surface perpendicular to the direction of propagation and cleaning time6min is the fitful condition. Select the pH value of13NaOH solution and0.2mol/L solution of H3BO3as cleaning agent. Then cleaning effect can be obtained without affecting reused performance of the membrane.We select material, configure,equipment and design the optimize for the whole film.We draw processing equipment drawings according to the actual situation of enterprises related to the design of the device and based on a small sample uptake parameters calculated...