Fenton process sewage treatment integrated device based on iron sludge reuse and method thereof

Abstract

The invention provides a Fenton process sewage treatment integrated device based on iron sludge reuse and a method thereof. The device at least comprises a Fenton reaction pond (1), a sludge storage pond (2), an iron sludge acidifying reaction pond (3), an ultraviolet hydrogen peroxide reactor (4) and an electrolytic reaction pond (5) which are successively connected. The Fenton process sewage treatment method capable of treating the iron sludge online provided by the invention comprises the following steps of: firstly implementing Fenton treatment; then discharging the iron sludge to the sludge storage pond (2); then performing a full acidification reaction in the iron sludge acidifying reaction pond (3); filtering the mixture with an immersed membrane assembly (17) to reduce the content of organic matters and the concentration of suspended solids; then performing secondary oxidization with the ultraviolet hydrogen peroxide reactor (4); and finally, reducing Fe<3+> into Fe<2+> through electrolysis to obtain a regenerated Fe<2+> catalyst. The method provided by the invention realizes online reuse of Fenton iron sludge, reduces discharge of the Fenton iron sludge by 70% above and reduces the dosage of a Fenton reaction catalyst by 50% above, so that the method has a wide application prospect and potential market value.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a Fenton sewage treatment device, in particular to a Fenton sewage treatment integrated device based on iron slime reuse, and also relates to a Fenton Fenton method capable of recycling iron sludge online using the device. methods of sewage treatment. Background technique [0002] Fenton oxidation is an effective advanced oxidation process, which is widely used in the treatment of various refractory industrial wastewater due to its simple equipment, strong oxidation capacity and high treatment efficiency. The mechanism of Fenton oxidation is Fe 2+ and H 2 o 2 Composition of Fenton's reagent, which constitutes an oxidation system, mainly has two effects: on the one hand, Fenton's reagent produces a large number of hydroxyl radicals (OH), which oxidizes refractory organic pollutants in sewage into CO 2 and H 2 O, on the other hand, Fe(OH) produced by Fenton's reagent 3...

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Problems solved by technology

[0007] The technical solution provided by the present invention is to solve the above-mentioned technical problems existing in the prior art, for example: some iron slime recycling methods turn iron slime into ferrous sulfate crystals, the energy consumption is high, and because the sources of sewage are different Lead to problems such as unstable quality of ferrous sulfate; some Fenton oxidation methods do not completely remove organic matter, resulting in the generation of iron sludge to absorb a large amount of organic matter. If the removal of this part of organic matter is not considered in the process of resource utilization, it will easily lead to secondary pollution , if activated carbon adsorption is used to transfer organic matter to activated carbon, additional consideration should be given to the treatment and disposal of activated carbon; Fenton iron slime is regenerated into Fe 2+ When the solution is used as a catalyst for the Fenton reaction, if the mixed solution containing mud is used directly, the efficiency of the Fenton reaction will be reduced and the quality of the effluent will be deteriorated.

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