Process for treating chemical fluorine-containing wastewater by combining micro-electrolysis, Fenton and lime coagulation
A combined treatment and micro-electrolysis technology, applied in the direction of flocculation/sedimentation water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the level and requirements of industrial production application, harmful and difficult to meet standards and other issues to achieve the effect of improving the efficiency of wastewater treatment
Inactive Publication Date: 2020-08-07
LIAONING TECHNICAL UNIVERSITY
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Among them, the chemical precipitation method is widely used in industry, but the treatment depth is not enough, and it is difficult to meet the standard. The rest of the methods are only in the laboratory for exploration and research because they have not reached the level and requirements of industrial production and application.
[0004] Fluorine-containing organic wastewater contains complex, toxic, harmful, biodegradable organic matter and high concentrations of fluorine, making it difficult to treat
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[0037] The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing, and it is as a part of this specification, and the principle of the present invention is illustrated through the embodiment, and other aspects, features and advantages of the present invention will become clear at a glance through this detailed description. In the figures referred to, the same or similar parts in different figures are denoted by the same reference numerals.
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Abstract
The invention discloses a process for treating chemical fluorine-containing wastewater by combining micro-electrolysis, Fenton and lime coagulation. The process comprises an iron-carbon-Fenton combined experiment and a lime defluorination coagulation experiment, wherein the iron-carbon-Fenton combined experiment comprises an iron-carbon micro-electrolysis experiment and a Fenton oxidation experiment carried out on the basis of iron-carbon micro-electrolysis; the influence of different pH values, reaction time, aeration rate and filler dosage on the CODcr removal effect is studied by the iron-carbon micro-electrolysis experiment, and the CODcr removal effect is studied by different H2O2 dosage, pH and reaction time by the Fenton oxidation experiment; the lime defluorination coagulation experiment comprises the steps: performing lime method defluorination on water subjected to iron-carbon micro-electrolysis defluorination, wherein the F<-> removal effect is achieved by different additionamounts and reaction time; because the lime method defluorination precipitation is fine and the precipitation speed is slow, the influence of different pH values, PAC addition amounts and PAM addition amounts on the removal effect needs to be studied in cooperation with coagulation reaction defluorination and coagulation experiment parts. Under the optimal process conditions, the comprehensive removal rate of COD can reach 88.7%, and the comprehensive removal rate of F<-> can reach 99%.
Description
technical field [0001] The invention belongs to the technical field of chemical fluorine-containing wastewater treatment, and in particular relates to a micro-electrolysis-Fenton-lime coagulation combined process for treating chemical fluorine-containing wastewater. Background technique [0002] For a long time, the production capacity of fluorine-containing polymer materials in the world has grown rapidly and simultaneously with consumer demand. A large amount of fluorine-containing organic wastewater is produced in the production process of fluorine chemical products. The composition of pollutants in chemical fluorine-containing organic wastewater is complex, and the water quality and quantity vary greatly. The concentration of harmful pollutants is high, the chroma is high, and the biodegradability is low. It is a kind of wastewater that is difficult to treat in industry. The characteristics of fluorine chemical production wastewater in my country are that there are many ...
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IPC IPC(8): C02F9/06C02F101/14
CPCC02F9/00C02F1/461C02F1/722C02F1/725C02F1/583C02F1/5245C02F1/5236C02F1/56C02F2101/14
Inventor 范荣桂刘娜
Owner LIAONING TECHNICAL UNIVERSITY
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