Fenton oxidation wastewater treatment method and system
A technology for oxidizing wastewater and treatment method, applied in the direction of oxidizing water/sewage treatment, etc., can solve the problems of high maintenance cost, long residence time, low treatment efficiency, etc. Effect
Inactive Publication Date: 2014-02-05
SHANDONG ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology
Without combining the water quality characteristics and treatment requirements of wastewater, reasonably determining the dosage of chemicals and reaction conditions, and creating conditions conducive to the formation of iron oxide particles, resulting in long residence time of Fenton oxidation equipment, high maintenance costs, and low treatment efficiency. situation
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[0017] Fenton oxidation wastewater treatment method of the present invention is according to H 2 o 2 The relationship between the molar concentration ratio of the dissolved COD in the wastewater to be removed (the difference between the dissolved COD content in the wastewater and the dissolved COD content in the treated effluent) is 0.8-1.0 to determine the H in the wastewater 2 o 2 dosage, and then according to H 2 o 2 The relationship between the molar concentration ratio of ferrous sulfate and ferrous sulfate is 0.6-0.9 determines the dosage of ferrous sulfate in wastewater. This is because the Fenton oxidation technology mainly passes through the Fe(OH) in the system 3 Coagulation mechanism and OH oxidation mechanism to remove pollutants in wastewater, theoretically 1molH 2 o 2 Produces 1 mol of oxygen, and ideally completely mineralizes the removed COD and H through oxidation 2 o 2 The molar ratio is 1:1. Most of these removed pollutants are dissolved organic matt...
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The invention discloses a Fenton oxidation wastewater treatment method and system. The wastewater treatment method comprises the following steps: determining the addition amount of H2O2 in wastewater according to the relation that the molar concentration ratio of the H2O2 to resolvable COD (Chemical Oxygen Demand) in the wastewater needing to be treated is 0.8-1.0, and determining the addition amount of ferrous sulfate in the wastewater according to the molar concentration ratio of the H2O2 to the ferrous sulfate of 0.6-0.9; firstly, regulating the pH value of the wastewater to be 5.5-6.5, then, dividing the wastewater to be two spurts, respectively adding the ferrous sulfate and the H2o2 into the two spurts, and respectively and adequately mixing; and thirdly, introducing the two spurts of the wastewater to mix together to perform a Fenton oxidation reaction. The system comprises a main body, wherein the upper part in the main body is provided with a separation area, the bottom of the main body is provided with a water distribution area, and an oxidation reaction area is formed between the separation area and the water distribution area. By adopting the Fenton oxidation wastewater treatment method and system, the addition amount of a Fenton regent can be reasonably determined, so that the mixing effect of Fe<2+> and the H2O2 is enhanced, the use efficiency of the H2O2 is improved, the yield of chemical sludge is little, the addition amount of the agent is reduced and the oxidation reaction time is shortened.
Description
technical field [0001] The invention relates to a Fenton (Fenton) oxidation method for wastewater treatment, belonging to the technical field of wastewater treatment. Background technique [0002] Fenton (Fenton) oxidation technology is a kind of advanced oxidation technology. Compared with other advanced oxidation technologies, it has the advantages of simple operation, low investment and operation costs, and has been widely used in sewage treatment. There are two types of existing Fenton oxidation reaction systems, one is the traditional homogeneous reaction system, this type of technology mainly uses dissolved Fe 2+ as a catalyst. Due to the many side reactions in the Fenton reaction, when H 2 o 2 and FeSO 4 Insufficient mixing and improper reaction time will reduce the reaction efficiency, increase the amount of dosing, and produce more iron sludge, which not only wastes raw materials but also increases the cost of iron sludge treatment, which brings a heavy burden...
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Inventor 于军李刚陆建接孙洪涛翟桂元高磊徐宝刚贺波王家国
Owner SHANDONG ACAD OF ENVIRONMENTAL SCI