Method for processing toxic matter-containing water and processing device
A technology of harmful substances and treatment methods, which is applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of poor sludge sedimentation, achieve excellent sedimentation, and improve fluorine removal. Excellent effect, excellent fluorine removal effect
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Embodiment 1
[0100] pass Figure 4 The shown treatment system treats fluoridated water as follows. First, fluorine-containing water (fluorine concentration: 20 mg / L) was introduced into the addition tank 10 , and polyaluminum chloride was added so that the aluminum concentration in the water became 240 mg / L. On the other hand, all the sludge separated in the solid-liquid separation tank 40 was returned to the second addition tank 20, where 1 g / L of magnesia was added to 1 L of fluorine-containing water. This sludge was introduced into the reaction tank 30, mixed with polyaluminum chloride-added fluorine-containing water, stirred for 30 minutes, and reacted at a temperature of 20° C. for 30 minutes. After the reaction, sodium hydroxide was added as a pH regulator to adjust the pH to 8.5 to 9.5, and the generated slurry containing sludge was introduced into a solid-liquid separation tank 40 (concentration tank) and left to stand for 20 hours to make the sludge settlement. In addition, 2 m...
Embodiment 2
[0107] pass image 3 In the shown treatment system, the fluoride-containing water is treated as follows. First, fluorine-containing water (fluorine concentration: 20 mg / L) was introduced into the addition tank 10 , and aluminum sulfate was added so that the aluminum concentration in the water became 240 mg / L. This is introduced into the reaction tank 30 . On the other hand, all the sludge separated in the solid-liquid separation tank 40 is returned to the reaction tank 30 . Then, 1 g / L of magnesium oxide was added to 1 L of fluorine-containing water in the reaction tank 30 , mixed with the fluorine-containing water to which aluminum sulfate was added, stirred for 30 minutes, and reacted at a temperature of 20° C. for 30 minutes. After the reaction, sodium hydroxide is added as a pH regulator to adjust the pH to 8.5 to 9.5, and then the slurry containing the generated sludge is introduced into the solid-liquid separation tank 40 (concentration tank) and left to stand for 20 h...
Embodiment 3
[0114] pass Figure 4 In the shown treatment system, water containing harmful substances including fluorine and heavy metals is treated as follows. First, water containing harmful substances (the concentration of harmful substances in raw water is described in Table 5) was introduced into the addition tank 10, and polyaluminum chloride was added so that the aluminum concentration in the water became 240 mg / L. This is introduced into the reaction tank 30 . On the other hand, all the sludge separated in the solid-liquid separation tank 40 was returned to the second addition tank 20, where 1 g / L of magnesium oxide was added to 1 L of water containing harmful substances. The sludge was returned to the reaction tank 30, mixed with water containing harmful substances to which polyaluminum chloride was added, stirred for 30 minutes, and reacted at a temperature of 20° C. for 30 minutes. After the reaction, sodium hydroxide was added as a pH regulator to adjust the pH to 8.5 to 9.5,...
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