Emergency treatment method for sudden heavy metal pollution of drinking water
A technology for emergency treatment and sudden pollution, applied in the field of water treatment, can solve problems such as produced water not meeting drinking water sanitation standards, unsatisfactory treatment effect, and drinking water safety, so as to improve anti-pollution ability, guarantee removal, and slow down pollution effect
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Embodiment 1
[0037] The present embodiment is the embodiment of the emergency treatment method for sudden heavy metal pollution in drinking water of the present invention, comprising the following steps:
[0038] S10. Select the type of filter medium, ultrafiltration membrane and nanofiltration membrane, and build emergency treatment including heavy metal adsorption column 3, filter 4, ultrafiltration module 5, first nanofiltration membrane device 8, and second nanofiltration membrane device 9 system;
[0039]S20. Use the first water pump 2 to pump the polluted drinking water in the raw water tank 1 into the heavy metal adsorption column 3 to absorb and remove heavy metals to obtain the first produced water, and the first produced water enters the filter 4 to remove large particle colloids, suspended solids and macromolecules The second produced water is obtained after the organic matter, and the third produced water is obtained after the second produced water is intercepted by the ultrafi...
Embodiment 2
[0059] The present embodiment is the same as the first embodiment, except that in the present embodiment, the critical adsorption capacity of zeolite is 4.608 mg / g, the consumption of zeolite is 47 kg, the hydraulic retention time is 76 s, and the nanofiltration membrane adopts the model NF270-4040 composite membrane, The molecular weight cut off is 270Da, and the experimental results are shown in Table 3.
[0060] Table 3 The removal effect of heavy metal ions in Example 2
[0061]
[0062]As can be seen from the data in Table 3, this embodiment has a remarkable effect on the removal of heavy metal ions, and the removal rate of heavy metal ions reaches 96.74% to 99.76%, especially for copper ions. The removal effect is as high as 99.57%. The heavy metal removal effect is obvious, and the concentration of most heavy metals in the influent can be effectively controlled within 10mg / L, which can effectively guarantee the normal operation of the subsequent double-membrane (ultr...
Embodiment 3
[0064] The present embodiment is the same as the first embodiment, except that in the present embodiment, the critical adsorption capacity of zeolite is 5.332 mg / g, the amount of zeolite is 41 kg, the hydraulic retention time is 65 s, and the nanofiltration membrane adopts a tubular ceramic membrane with a molecular weight cut-off of 600Da, the experimental results are shown in Table 4.
[0065] Table 4 The removal effect of heavy metal ions in Example 3
[0066]
[0067]
[0068] As can be seen from the data in Table 4, this embodiment has a remarkable effect on the removal of heavy metal ions, and the removal rate of heavy metal ions reaches 93.60% to 99.79%, especially for copper ions. The removal effect is as high as 99.91%. The heavy metal removal effect is obvious, and the concentration of heavy metals in the influent can be effectively controlled at 10mg / L, which can effectively guarantee the normal operation of the subsequent double-membrane (ultrafiltration memb...
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