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Method and device for treating leachate MBR effluent through combination of ozone-catalyzed oxidation and aeration biological filter towers

A technology of ozone catalytic oxidation and aerated organisms, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Problems such as component fouling and clogging can be achieved to achieve high-efficiency utilization, improve aeration efficiency, and achieve comprehensive utilization

Active Publication Date: 2018-03-06
NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

[0003] (1) The membrane advanced treatment process will produce a certain amount of membrane concentrate, which is about 20% of the influent scale. At present, the concentrate treatment is the main bottleneck in the leachate treatment process
[0004] (2) Due to the poor water quality, the subsequent advanced treatment membrane elements are seriously fouled, resulting in a greatly reduced system water production rate and serious deterioration of the water quality.
[0005] (3) Membrane elements are replaced frequently, resulting in a further increase in operating costs

Method used

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  • Method and device for treating leachate MBR effluent through combination of ozone-catalyzed oxidation and aeration biological filter towers

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Embodiment 1

[0060] Taking the MBR effluent from a landfill as the treatment object, the water quality indicators are CODcr 620mg / L, pH 7.8, conductivity 15.1ms / cm, and water volume 2m 3 / h. First, the built-in MBR effluent of the landfill digestion tank is sent to the leachate MBR effluent storage tank 1. cr The mass ratio is controlled at 14:1; the mass ratio of hydrogen peroxide dosage to ozone oxygen dosage is controlled at 1:100. The circulation ratio of the control circulation pump is 40%. The height ratio of the defoaming zone in the ozone catalytic oxidation tower to the ozone catalytic oxidation tower is 1:10, and the defoaming zone is filled with wire mesh defoaming packing; the height ratio of the first catalytic zone to the catalytic oxidation tower is 1:4, and the catalyst loaded is granular Noble Palladium Nickel Metal and MnO Supported on Polysilicic Clinoptilolite 2 The active component has a particle size of 4mm; the height ratio of the second-stage catalytic zone to th...

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Abstract

The invention provides a method for treating leachate MBR effluent through combination of ozone-catalyzed oxidation and aeration biological filter towers. The method comprises carrying out gas-liquidmixing on leachate MBR effluent and ozone according to a reaction ratio through an injector, mixing the gas-liquid mixture and a circulation fluid, mixing the mixture and hydrogen peroxide according to a reaction ratio through a static mixer, feeding the final mixed liquid into an ozone-catalyzed oxidation tower through a lower water inlet, feeding the tail gas discharged through a top tail gas outlet into an ozone decomposing device, carrying out treatment, carrying out gas-liquid mixing through the injector, feeding the gas-liquid mixture into a biological filter tower through a low water inlet, and carrying out treatment through the biological filter tower so that the product water can stably satisfy the municipal solid waste landfill pollution control standard (GB 16889-2008) in the fig 2. The method realizes full treatment on leachate MBR, solves the problem that the prior art is difficult to treat a thick membrane liquid and realizes the efficient and comprehensive utilization ofozone.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for synergistically treating leachate MBR effluent by ozone catalytic oxidation and aerated biological filter tower. Background technique [0002] Membrane bioreactor (MBR) has the advantages of small footprint, good effluent quality, and low sludge production. In recent years, with the deepening of its research and the expansion of its application, the MBR process has been gradually applied to the treatment of landfill leachate. . However, since landfill leachate is a kind of wastewater with complex components and high concentration of organic matter, and contains a large amount of refractory biodegradable substances, it is still difficult to achieve satisfactory treatment results by relying solely on the biochemical treatment centered on the MBR process, so additional follow-up treatment is still needed measures to meet emission standards. In China, nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 刘军蔡其行杨云军康善娇戴昕孙少龙
Owner NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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