Treatment method for comprehensive sewage of smelting
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A treatment method and technology for sewage, applied in water/sewage treatment, metallurgical wastewater treatment, adsorption water/sewage treatment, etc. Effect of settling time
Inactive Publication Date: 2020-04-10
河南菲迪泰环境科技有限公司
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Because heavy metals cannot be biodegraded, they will be deposited at the bottom of the water after physical and chemical reactions in the water body. However, with the increase of water temperature, pH changes and the absorption of aquatic organisms, the sediment will slowly release heavy metal components to the water body, and then cause lasting harm to water bodies
And as the pollution level continues to increase, the heavy metal components in the wastewater will migrate to the air and soil, and then accumulate in the food chain, causing great harm to humans in the food chain
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Embodiment 1
[0035] The relevant components and their contents in the sewage treated in this embodiment are shown in Table 3.
[0036] Table 3 Relevant components and their contents in the sewage treated by this embodiment
[0037] serial number project name unit value 1 pH dimensionless 3.2 2 COD mg / L 168 3 Ammonia nitrogen mg / L 32 4 Fluoride mg / L 103.5 5 As mg / L 7 6 Total Cadmium mg / L 16 7 Hexavalent chromium mg / L 67
[0038] The processing method of the present embodiment smelting comprehensive sewage, the detailed steps of this processing method are as follows:
[0039] a. First place the 1.1m 3 The comprehensive smelting sewage, that is, the raw water, is introduced into the wastewater regulating tank, and then 0.17 kg of calcium hydroxide is added to adjust its pH value to 7;
[0040] b. Lift the raw water adjusted in step a into the reduction reaction tank, add 0.088 kg of sodium pyrosulfite to carry...
Embodiment 2
[0049] The relevant components and their contents in the sewage treated in this embodiment are shown in Table 5.
[0050] Table 5 Relevant components and their contents in the sewage treated by this embodiment
[0051] serial number project name unit value 1 pH dimensionless 4.5 2 COD mg / L 188 3 Ammonia nitrogen mg / L 48.1 4 Fluoride mg / L 118.7 5 As mg / L 10 6 Total Cadmium mg / L 20 7 Hexavalent chromium mg / L 78
[0052] The processing method of the present embodiment smelting comprehensive sewage, the detailed steps of this processing method are as follows:
[0053] a. First set the 1.0m 3 The comprehensive smelting sewage, that is, the raw water, is introduced into the wastewater regulating tank, and then 0.2 kg of calcium hydroxide is added to adjust its pH value to 8;
[0054] b. Lift the raw water adjusted in step a into the reduction reaction tank, add 0.05 kg of sodium pyrosulfite to carry ...
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Abstract
The invention discloses a treatment method for comprehensive sewage of smelting. The method comprises the following steps: introducing the comprehensive sewage of smelting into a wastewater regulatingtank to regulate a pH value of the sewage; then lifting the comprehensive sewage to a reduction reaction tank, adding a reducing agent, and carrying out a reduction reaction; after the reaction, introducing the comprehensive sewage into a coagulation reaction tank, adjusting the pH value of the comprehensive sewage to 7, then adding a heavy metal remover, and carrying out treatment; introducing the treated sewage into an inclined-tube sedimentation tank for flocculating settling, enabling the obtained supernatant to enter a clean water tank, and treating the obtained sludge for refining of heavy metals or other treatment; introducing the obtained supernatant into an LEC electro-catalytic oxidation device for degradation of organic pollutants, and discharging the sewage after the sewage reaches the standard. When the method is used for treating the comprehensive sewage, high efficiency and low cost are achieved, environmental protection is facilitated, and certain social benefits and economic benefits are achieved.
Description
[0001] 1. Technical field: [0002] The invention belongs to the technical field of sewage treatment methods, and in particular relates to a treatment method for comprehensive smelting sewage. [0003] 2. Background technology: [0004] With the development of economy and society, my country's lead-zinc smelting industry has also developed rapidly, but at the same time we must also clearly see that heavy metal pollution incidents occur frequently, which in turn has caused serious harm to the living environment of human beings. In this case, the state has paid more attention to the treatment of metal wastewater, and has raised the requirements for the treatment process of metal smelting wastewater. In reality, if metal smelting wastewater is recycled, it can not only reduce the operating costs of enterprises, but also effectively save water resources, which has important economic value and practical significance, and should attract our full attention. [0005] In actual work, t...
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