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Surfactant waste water treatment method
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A surfactant and wastewater technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unsatisfactory COD removal effect in wastewater and no qualitative analysis
Inactive Publication Date: 2012-04-11
NANJING UNIV
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Problems solved by technology
[0011] Since there is no in-depth research on zinc-containing flocculants at home and abroad, the understanding of this flocculant has not been qualitative, and the wastewater COD removal effect is not ideal when using this flocculant to treat wastewater separately.
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Embodiment 1
[0037] According to the water quality of different wastewater, the verification of the removal rate of COD amount is carried out, and the experimental data are shown in Table 1. Select the four kinds of wastewater in Table 1, and use zinc-containing flocculant for surface active wastewater treatment. The component of zinc-containing flocculant is polyaluminum zinc chloride (PAZC), and the ratio of zinc to aluminum is 3:5.
[0038] Table 1 Experimental data of several kinds of wastewater treatment
[0039] beaker
[0040] From the above data, it can be concluded that the flocculant has an ideal effect when dealing with surfactants, especially in removing COD, which has a remarkable effect.
Embodiment 2
[0042] When the dosage of zinc-containing flocculant was fixed at 5‰ of the wastewater weight, different pH values, reaction time and reaction temperature were selected to investigate the COD of the effluent. The experimental data are shown in Table 2. The components of the zinc-containing flocculant are polyaluminum zinc chloride (PAZC) and microbial flocculant, wherein the weight ratio of polyaluminum zinc chloride (PAZC) and microbial flocculant is 1:1, and the flocculant substance produced by microorganisms is sugar Protein, mucopolysaccharide, protein, cellulose, relative molecular mass above 105.
[0043] Table 2 Experimental data of wastewater treatment
[0044] experiment
[0045] According to the experimental data, it can be seen that the optimum pH value is 6.
Embodiment 3
[0047]When the dosage of zinc-containing flocculant was fixed at 5‰ of the wastewater weight, different pH values, reaction time and reaction temperature were selected to investigate the COD of the effluent. The experimental data are shown in Table 3. The components of the zinc-containing flocculant are polyaluminum zinc chloride (PAZC) and microbial flocculant, wherein the weight ratio of polyaluminum zinc chloride (PAZC) and microbial flocculant is 3:1, and the flocculant substance produced by microorganisms is sugar Protein, mucopolysaccharide, protein, cellulose, relative molecular mass above 105.
[0048] Table 3 Experimental data of wastewater treatment
[0049] experiment
[0050] According to the experimental data, it can be seen that the optimum reaction temperature is 45°C.
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Abstract
The invention discloses a surfactant waste water treatment method, belonging to the waste water treatment field. The method includes the steps that: (1) flocculating agent containing zinc is prepared; (2) addition amount of flocculating agent containing zinc is 5-20 per mill, pH value is 4-12, after addition, reaction temperature is set to be 20-50 DEG C, and reaction time is 20-40min. The treatment effect of the flocculating agent containing zinc of the invention to surfactant waste water is obvious compared with effect to other waste waters, and COD removal rate can reach more than 85%; optimal reaction conditions for flocculating agent containing zinc to treat surfactant waste water include that: addition amount of flocculating agent containing zinc is 20 per mill, pH value is 6, reaction temperature is 45 DEG C, and reaction time is 20min; addition amount of flocculating agent containing zinc has the most important effect on the treatment technology, as zinc is heavy metal and has certain toxicity, maximum and optimal addition amount of flocculating agent containing zinc is determined to be 20 per mill.
Description
technical field [0001] The invention belongs to a wastewater treatment method, in particular to a surfactant wastewater treatment method. Background technique [0002] The source of surfactant LAS wastewater In addition to the large amount of LAS wastewater discharged during the production of synthetic detergents, LAS wastewater will be generated in washing, chemical, textile and other industries and in daily life. LAS in wastewater itself has certain toxicity, and has chronic poisonous effect on animals, plants and human body. LAS can also cause the rate of oxygen transfer in water to decrease, hindering the self-purification of water body. In addition, the foam produced by waste water will also affect the sanitation and aesthetics of the environment. At present, in addition to the original physicochemical and biochemical methods, there are new methods such as membrane separation and micro-electrolysis for the treatment of LAS wastewater, which have been applied to a certa...
Claims
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Application Information
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