Treatment method for analyzing waste liquid
A technology for analyzing waste liquid and treatment methods, which is applied in the treatment of waste liquid containing Cr6+, Cr3+, Fe3+, and in the field of waste liquid produced by COD analysis by potassium dichromate method, which can solve the problem of unsuitable separation of waste liquid, safety and harmlessness, and resources waste and other problems, to achieve the effect of enhancing the curing and stabilization effect, eliminating environmental pollution, and reducing treatment costs
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[0044] Example 1:
[0045] Please refer to figure 1 Shown is a process flow diagram of a preferred embodiment of the processing method for analyzing waste liquid of the present invention. 1000ml of analytical waste liquid produced by the potassium dichromate method for COD determination is placed in 1# sedimentation tank, and 3g of sodium chloride is added to the waste liquid. + It is converted into silver chloride precipitation and separated by filtration, silver chloride is recovered, and the waste liquid is transferred to 2# precipitation tank;
[0046] Adjust the pH value of the waste liquid in the 2# precipitation tank with sodium hydroxide solution to 2.5, and add 25g of ferrous sulfate hexahydrate, preferably stirring at a speed of 150 rpm for 30 minutes;
[0047] Adjust the pH value of the above waste liquid to 11 with sodium hydroxide solution, and add 10 mg of polyacrylamide, preferably stirring at a speed of 150 rpm for 2 min, and then at a speed of 50 rpm for 30 min, and...
Example Embodiment
[0053] Example 2:
[0054] Please refer to figure 1 Shown is the process flow diagram of the processing method for analyzing waste liquid of the present invention. 1000ml of analytical waste liquid produced by the potassium dichromate method for COD determination is placed in 1# sedimentation tank, and 2g of sodium chloride and 1.5g of ferrous chloride are added to the waste liquid. + It is converted into silver chloride precipitation and separated by filtration, silver chloride is recovered, and the waste liquid is transferred to 2# precipitation tank;
[0055] Adjust the pH value of the waste liquid in the 2# precipitation tank with sodium hydroxide solution to 3.0, add 15 g of ferrous sulfate hexahydrate and 25 g of sodium sulfite, preferably at a speed of 150 rpm for 30 min;
[0056] Adjust the pH value of the above waste liquid to 11.5 with sodium hydroxide solution, and add 5 mg of polyacrylamide, preferably stirring at a speed of 150 rpm for 2 min, and then at a speed of 50 r...
Example Embodiment
[0062] Example 3:
[0063] Please refer to figure 1 Shown is the process flow diagram of the processing method for analyzing waste liquid of the present invention. 1000ml of analytical waste liquid produced by the potassium dichromate method for COD determination is placed in 1# sedimentation tank, and 2.0 g of sodium chloride is added to the waste liquid, and it is allowed to stand after proper stirring. + It is converted into silver chloride precipitation and separated by filtration, silver chloride is recovered, and the waste liquid is transferred to 2# precipitation tank;
[0064] Adjust the pH value of the waste liquid in the 2# precipitation tank with sodium hydroxide solution to 2.85, add 10g of sodium metabisulfite and 30g of sodium sulfite, preferably stirring at a speed of 150 rpm for 30 minutes;
[0065] Adjust the pH value of the waste liquid to 11.8 with sodium hydroxide solution, and add 5 mg of polyacrylamide, preferably stirring at a speed of 150 rpm for 2 min, and t...
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