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Method for deeply treating wasted paper pulping and papermaking waste water by adopting membrane separation method
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology for pulping and papermaking and advanced treatment, which is used in water treatment parameter control, water/sewage treatment, chemical instruments and methods, etc.
Inactive Publication Date: 2015-02-25
GUANGXI UNIV
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Problems solved by technology
In many cases, conventional wastewater treatment processes do not meet current discharge standards
Method used
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Embodiment 1
[0017] A method for advanced treatment of waste paper pulping and papermaking wastewater by membrane separation method:
[0018] 1. The indicators of the effluent after the waste paper pulping and papermaking wastewater is filtered by the inclined screen of the factory are that the total solid content is 5.485g.L -1 , COD Cr 2800mg.L -1 , biological oxygen demand BOD 5 1850mg.L -1 , pH value 7.14, color 850 times.
[0019] 2. Use ultrafiltration technology to treat the experimental water. The polyethersulfone PES flat membrane is selected, and the concentration rate is 80%, and the permeate solid content, chemical oxygen consumption COD Cr , Filtrationmembrane flux is the investigation index.
[0020] 3. The membrane pore size is 5k, the temperature is 30°C, the rotation speed is 0rpm, and the pressure is 0.1MPa.
[0021] The solid content of the filtrate was measured to be 0.816g.L -1 , COD Cr 415mg.L -1 , the filtrationmembrane flux is 6.297L.(m 2 .h) -1 . Com...
Embodiment 2
[0023] A method for advanced treatment of waste paper pulping and papermaking wastewater by membrane separation method:
[0024] 1. Same as Step 1 of Example 1.
[0025] 2. Same as Step 2 of Example 1.
[0026] 3. The membrane pore size is 100k, the temperature is 40°C, the rotation speed is 300rpm, and the pressure is 0.15MPa.
[0027] The solid content of the filtrate was measured to be 1.279g.L -1 , COD Cr 378mg.L -1 , the filtration membrane flux is 26.789L.(m 2 .h) -1 . Compared with raw water, various indicators have been greatly reduced, reaching the discharge standard.
Embodiment 3
[0029] A method for advanced treatment of waste paper pulping and papermaking wastewater by membrane separation method:
[0030] 1. Same as Step 1 of Example 1.
[0031] 2. Same as Step 2 of Example 1.
[0032] 3. The membrane pore size is 30k, the temperature is 60°C, the rotation speed is 100rpm, and the pressure is 0.25MPa.
[0033] The solid content of the filtrate was measured to be 1.248g.L -1 , COD Cr 493mg.L -1 , the filtration membrane flux is 12.888L.(m 2 .h) -1 . Compared with raw water, various indicators have been greatly reduced, reaching the discharge standard.
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Abstract
The invention discloses a method for deeply treating wasted paper pulping and papermaking waste water by adopting a membrane separation method. The method for deeply treating the wasted paper pulping and papermaking waste water by adopting the membrane separation method is characterized in that effluent obtained by filtering the wasted paper pulping and papermaking waste water by virtue of an inclined sieve in a factory is subjected to ultrafiltration membrane treatment, permeate solid content, chemical oxygen consumption CODCr and filtering membrane flux are taken as measurement indexes respectively, and influences of technological factors of membrane pore size, pressure, temperature, rotating speed and the like to an ultrafiltrationsystem are comprehensive surveyed. The method for deeply treating the wasted paper pulping and papermaking waste water by adopting the membrane separation method has the beneficial effects that the method disclosed by the invention is applicable to an ultrafiltration process of comprehensive wastewatersecondary treatmenteffluent, optimized ultrafiltration operating conditions are completely feasible, and economy and stability of a system can reach relatively ideal levels on the basis of meeting the discharge standard of the effluent.
Description
technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for advanced treatment of waste paper pulping and papermaking wastewater by a membrane separation method. Background technique [0002] In recent years, environmental pollution and pollution control have become global hot issues. With the rapid development of the paper industry, the discharge of papermaking wastewater is increasing year by year, which has become a major problem that directly threatens human health. According to statistics, in 2010, China's chemical oxygen demand (COD Cr ) emissions were 719,000 tons, accounting for 20.3% of the national industrial emissions, while paper mill pollutants accounted for 90% of the total pollutants. It is estimated that the paper industry is responsible for 50% of the pollutants dumped into rivers. If the papermaking wastewater cannot be effectively treated and discharged directly, it will cause a lot of environmen...
Claims
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