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Processing system and method for purifying organic wastewater

A technology of organic wastewater and treatment methods, applied in the direction of oxidized water/sewage treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of difficult regeneration, easy saturation of physical adsorbents, interference of AOP, etc., and achieve simple structure , the effect of taking up little space

Active Publication Date: 2016-05-25
宁磊
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, AOP has three major limitations, namely (1) the operating pH range is very narrow, 2.5-3.0, (2) hydrogen peroxide H 2 o 2 The optimal dosage depends on the concentration of pollutants to be oxidized, which must be known from experiments, (3) free radical scavengers, such as CO 2 HCO produced by dissolving in water 3 - with CO 3 2- ions, will consume OH and weaken the treatment effect
The present invention proposes a physical adsorption technology and two kinds of advanced oxidation technologies. The three are combined into one device and treatment process for treating organic wastewater with high COD content, which effectively solves the problem of AOP interference and also solves the problem of physical adsorption. The solvent is easily saturated and difficult to regenerate; in addition, a strong oxidant is added to assist OH to quickly and completely decompose COD into a harmless substance

Method used

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  • Processing system and method for purifying organic wastewater
  • Processing system and method for purifying organic wastewater
  • Processing system and method for purifying organic wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0083] Embodiment 1. Because leather wastewater contains animal fat and treatment chemicals, the concentration of organic and inorganic pollutants in the water is high, and the water is black and smelly. The waste water cannot be in direct contact with the ozone electrode, and the ozone gas must be pumped to the MAC filter tower by a vacuum pump, and the waste water and ferrous ion Fe flowing in from the EC electrolyzer 2+ Convergence, the organic / inorganic pollutants are recycled; that is, the leather wastewater is circulated between the MAC filter tower and the EC electrolytic cell for treatment until the scheduled treatment time (or reaches the standard). EC electrolyzer, MAC filter tower and EO 3 The composition and operating parameters of the electrolyzer are shown in Table 3:

[0084] .

[0085] The untreated leather waste water is pumped into the EC electrolytic cell by the water transfer pump. When the tank is full, the input of waste water is stopped, and the wast...

Embodiment 2

[0088] Embodiment two, processing cut off oil waste water, the main component of organic matter in water is: [alcohols (n-butanol, diethylene glycol), ethylene oxide, propylene oxide, polyethers (polyoxyethylene ether, polyoxyethylene propylene ether, triethanolamine)], the framework of the pretreatment process is based on distillation. Among them, the raw water COD is about 174,000mg / L. The water sample parameters after distillation are shown in Table 5:

[0089] .

[0090] Table 5 shows that the water sample after distillation is still high COD wastewater that can pollute the environment.

[0091] Put 9L of distilled cutting oil wastewater into the EC electrolyzer, and then carry out circular purification treatment on the wastewater. At regular intervals, water samples were taken from the bottom of the MAC filter tower to measure the COD value, and the results are shown in Table 6:

[0092] .

[0093] Cutting oil wastewater treated by the treatment system of the pre...

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Abstract

The invention discloses a processing system and method for purifying organic wastewater. The processing system comprises an EC electrolyzer, an EO3 electrolyzer and an MAC filter tower. The EO3 electrolyzer and a water tank form a cycle structure, and the EC electrolyzer and the EO3 electrolyzer are connected with the MAC filter tower respectively by a liquid outlet and an output port. The processing method comprises: generating a flocculant Fe<2+> by the EC electrolyzer to perform flocculation on the organic wastewater to generate sediment and scum, removing the sediment; the scum and organic wastewater and the flocculant Fe<2+> generate H2, O2 and O3 with the EO3 electrlyzer to together enter the MAC filter tower, and adsorbing the COD pollutants in the organic wastewater and the scum on the MAC surface, wherein, O3 generates .OH by MAC catalytic decomposition, Fe<2+> and O3 react to generate FeO<2+>, .OH and FeO<2+> degrade the COD pollutants and the scum adsorbed on the MAC. The EC electrolyzer, the EO3 electrolyzer and the MAC filter tower are smartly combined, a physical absorption technology and two types of advanced oxidation are combined, and the advantages of simple structure, small occupying space, high purifying efficiency and good purifying effect are realized.

Description

technical field [0001] The invention relates to a wastewater treatment system, in particular to a treatment system and method for purifying organic wastewater with high COD concentration. Background technique [0002] The ecology of the world's water bodies is deteriorating. With the increase of population and the rapid development of industry, the types and quantities of pollutants in water have increased exponentially, and the scarcity of available water has become increasingly widespread and serious, threatening human health and safety. Many emerging persistent pollutants make it more difficult for existing wastewater treatment technologies to reduce their toxicity, let alone completely decompose them into harmless substances. Among them, many wastewater containing high amounts of tenacious COD cannot be treated up to standard by a single chemical method, biological method, physical method or combined method. In 1894 AD, British chemist Henry Fenton (H.J.H.Fenton) publis...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F101/30
CPCC02F1/001C02F1/24C02F1/283C02F1/286C02F1/5245C02F1/72C02F1/78C02F9/00C02F2101/30C02F2209/08C02F2301/08
Inventor 薛立人宁磊
Owner 宁磊
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