A treating method of fluorine-containing waste water
A treatment method and wastewater technology, applied in the directions of water/sewage multi-stage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult molecular sieve production enterprises, achieve convenient operation management, improve removal Effect of fluorine efficiency and flexible operation
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Embodiment 1
[0062] This example is used to illustrate the treatment method of fluorine-containing wastewater provided by the present invention.
[0063] Production of fluorine-containing wastewater by PSRY molecular sieve: F - Content: 1441mg / L; SO 4 2- Content: 16704mg / L; Al 3+ Content: 3001mg / L; pH: 3.37.
[0064] Add 5000mg / L of aluminum chloride to 1000mL of PSRY molecular sieve production wastewater, and use NaOH aqueous solution (mass percentage concentration: 35% by weight) to adjust the pH value of the wastewater to 6.5, and stir for 20 minutes;
[0065] Then add 1000mL of the described effluent sludge to the waste water, stir and react for 20min; carry out sludge dehydration afterwards to obtain 1800mL filtrate; get the filtrate to measure F - The content is 9.1mg / L.
[0066] The filtrate is sent to the coagulation and sedimentation unit of the fluorine-free wastewater generated during the treatment of the catalyst production wastewater, mixed evenly with the coagulant (PAM ...
Embodiment 2
[0068] This example is used to illustrate the treatment method of fluorine-containing wastewater provided by the present invention.
[0069] Production of fluorine-containing wastewater by PSRY molecular sieve: F - Content: 2223mg / L; SO 4 2- Content: 24700mg / L; Al 3+ Content: 4441mg / L; pH: 2.96.
[0070] Add 2000mg / L polyaluminum chloride to 1000mL of PSRY molecular sieve production wastewater, and use NaOH aqueous solution (mass percentage concentration: 35% by weight) to adjust the pH value of the wastewater to 6.1, and stir for 15 minutes;
[0071] Add 2000mL of said effluent sludge to the waste water subsequently, stir and react for 20min; carry out sludge dehydration afterwards to obtain 2700mL filtrate; get the filtrate to measure F - The content is 6.3mg / L.
[0072] The filtrate is sent to the coagulation and sedimentation unit of the fluorine-free wastewater generated during the treatment of the catalyst production wastewater, mixed evenly with the coagulant (PAM ...
Embodiment 3
[0074] This example is used to illustrate the treatment method of fluorine-containing wastewater provided by the present invention.
[0075] Production of fluorine-containing wastewater by PSRY molecular sieve: F - Content: 2036mg / L; SO 4 2- Content: 22200mg / L; Al 3+ Content: 4075mg / L; pH: 3.28.
[0076] Add 5000 mg / L polyaluminum chloride to 1000 mL of PSRY molecular sieve production wastewater, and use NaOH aqueous solution (mass percentage concentration: 30% by weight) to adjust the pH value of the wastewater to 7.1, and stir for 30 minutes;
[0077] Then add 3000mL of said effluent sludge to the waste water, stir and react for 15min; carry out sludge dehydration afterwards to obtain 3600mL filtrate; get the filtrate to measure F - The content is 7.2mg / L.
[0078] The filtrate is sent to the coagulation and sedimentation unit of the fluorine-free wastewater generated during the treatment of the catalyst production wastewater, mixed evenly with the coagulant (PAM with a...
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