Integral composite catalytic oxidation-membrane separation wastewater treatment method and device

A catalytic oxidation and wastewater treatment technology, applied in the direction of oxidized water/sewage treatment, anaerobic digestion treatment, water/sewage treatment, etc., can solve the problems of slow biological treatment speed, unstable effluent, large treatment space, etc., and achieve improvement The effect of catalytic oxidation efficiency, prolonging membrane replacement cycle, and increasing degradation rate

Pending Publication Date: 2017-05-24
中节能工程技术研究院有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biological method has a slow treatment speed, requires a large treatment space, and has high requirements for the influent water, and the effluent water is not stable enough, and has low removal efficiency for some refractory organic substances; the coagulation method has low removal efficiency for hydrophilic pollutants and small molecular organic substances;

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  • Integral composite catalytic oxidation-membrane separation wastewater treatment method and device
  • Integral composite catalytic oxidation-membrane separation wastewater treatment method and device

Examples

Experimental program
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Example Embodiment

[0037] Example 1:

[0038] A composite catalytic oxidation-membrane separation treatment method for refractory wastewater, see figure 1 , The equipment used includes gas-liquid mixer 3, composite catalytic oxidation reactor 6, energy field generator 7, ceramic membrane filter 8;

[0039] The liquid outlet of the gas-liquid mixer 3 is connected to the composite catalytic oxidation reactor 6, the energy field generating device 7 is arranged on the composite catalytic oxidation reactor, and the waste water outlet of the composite catalytic oxidation reactor 6 is connected to the ceramic membrane filter 6;

[0040] The ceramic membrane filter is provided with a concentrated water outlet and a standard waste water outlet, the concentrated water outlet is connected to a circulating water tank 2, and a circulating water tank level gauge 17 is arranged in the circulating water tank; the standard waste water outlet is connected to a buffer through a backwash pipeline Tank 9 and water outlet...

Example Embodiment

[0047] Example 2

[0048] The composite catalytic oxidation-membrane separation integrated device of Example 1 is used to treat the biochemical effluent of coking wastewater, and the conditions are as follows: the inlet water flow rate is 10L / h, the raw water CODCr=112mg / L, pH=7.4, the catalyst is powdered activated carbon, and the catalyst is added The volume is 0.5g / L wastewater, the output power of the capacity field generator is 25W (the power of ultrasonic is 10W, the power of microwave is 15W), the mixed gas flow is 0.2L / min, and it enters the ozone / oxygen gas mixture of the gas-liquid mixer. The ozone concentration is 4.3mg / L, and the addition amount of hydrogen peroxide is 30mg / L.

[0049] The ceramic membrane filter is a tubular ceramic membrane. The average pore size of the ceramic membrane is 0.05μm, the transmembrane pressure difference is 0.3MPa, the air backwash pressure is 0.5MPa, the backwash cycle is 5min, the backwash time is 10s, and the exhaust The time is 5s. ...

Example Embodiment

[0051] Example 3

[0052] The above-mentioned composite catalytic oxidation-membrane separation integrated device is used to treat the biochemical effluent of papermaking wastewater, and the conditions are as follows: raw water COD Cr =232mg / L, pH=7.4, SS=115mg / L, coagulation, precipitation and quartz sand filtration pretreatment before entering the above disposal device, the experimental conditions are as follows: add 500mg / L polyaluminum chloride and 2mg / L L polyacrylamide, coagulation reaction for 5 minutes, precipitation for 30 minutes.

[0053] The water quality indicators after filtration are as follows: COD Cr =105mg / L, pH=6.9, SS=12mg / L, the wastewater after the above pretreatment enters the composite catalytic oxidation-membrane separation integrated device, the inlet water flow is 10L / h, the catalyst is powder γ-alumina, and the catalyst is added The capacity is 2 / L wastewater, the output power of the capacity field generator is 50W (ultrasonic power 25W, microwave power ...

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Abstract

The invention provides an integral composite catalytic oxidation-membrane separation wastewater treatment method which comprises the following steps: S1, introducing wastewater with a suspension catalyst, a mixed gas of ozone and oxygen and hydrogen peroxide into a gas-liquid mixer; S2, introducing the wastewater into a composite catalytic oxidation reactor, and inputting into an energy field through an energy field generation device; S3, filtering the wastewater by using a ceramic membrane filter, performing up-to-standard emission on effluent, emptying the treated gas, and feeding back membrane concentrated water which does not pass through the ceramic membrane filter and contains the suspension catalyst to the step S1. Devices used in the method provided by the invention comprise one gas-liquid mixer which can generate micro-nano bubbles, so that the apparent solubility of ozone and oxygen in the wastewater can be effectively improved, and the catalytic oxidation efficiency can be improved. Due to adoption of the energy field generation device, microwaves, ultrasonic waves, the catalyst and an oxidant have synergic effects in a composite catalytic oxidation reactor, so that the degradation velocity of pollutants by the oxidant can be increased.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a treatment method and a treatment device for refractory waste water. Background technique [0002] With the rapid development of modern industry, especially coal chemical industry, petrochemical industry, fine chemical industry, textile printing and dyeing, pharmaceutical pesticide, pulp and paper making and other industries, various refractory organic wastewaters are increasing, and these wastewaters generally have high pollutant concentration, toxicity It is characterized by large size and poor biodegradability, which seriously pollutes the water environment and endangers human health. After this type of industrial wastewater undergoes conventional physical, chemical and biochemical secondary treatment, the wastewater still contains a large amount of toxic and biodegradable organic pollutants, and further advanced treatment is required to meet discharge standar...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F9/14
CPCC02F9/00C02F1/36C02F1/302C02F1/001C02F2001/007C02F3/28C02F1/56C02F1/54C02F1/5236C02F1/44C02F3/02C02F1/78C02F1/727C02F1/725C02F1/722
Inventor 李海涛刘杰孔祥西邹结富邱明建
Owner 中节能工程技术研究院有限公司
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