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A progressive step-by-step reduction treatment method for oily sludge with micro-nano bubbles and ozone

A technology of micro-nano bubbles and treatment methods, which is applied in the direction of sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of environmental secondary pollution, etc., and achieve improved utilization rate, slow rising speed, The effect of increasing dwell time

Active Publication Date: 2020-12-22
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the excessive addition of rare earth metals and / or transition metals and flocculants in the actual application process will cause secondary pollution to the environment

Method used

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  • A progressive step-by-step reduction treatment method for oily sludge with micro-nano bubbles and ozone
  • A progressive step-by-step reduction treatment method for oily sludge with micro-nano bubbles and ozone
  • A progressive step-by-step reduction treatment method for oily sludge with micro-nano bubbles and ozone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0039] Two, embodiment 1-7, comparative example 1-3

Embodiment 1

[0041] A step-by-step reduction treatment method for oily sludge with micro-nano bubbles and ozone. The oily sludge produced during the sewage treatment process of a petrochemical company in Shanghai is concentrated by sedimentation and centrifugation, and the concentration of oily sludge is prepared as follows: 28g / L. The ozone condition of micro-nano bubbles in the separation section is that the aeration rate is 0.1m 3 / h, the ozone concentration is 5ppm, and the ozone is passed into the ozone oxidation tank in the form of micro-nano bubbles through the titanium aeration head of 0.45 μm, and the treatment time is 0.5h; the pH value of the oily sludge is adjusted to be reduced to 3.0, and then Carry out micro-nano bubble ozone treatment in the reduction section, the condition is that the aeration rate is 1.0m 3 / h, the ozone concentration is 90ppm, the ozone is passed into the ozone oxidation tank in the form of micro-nano bubbles through the 0.45μm titanium aeration head, an...

Embodiment 2

[0044] A step-by-step reduction treatment method for oily sludge with micro-nano bubbles and ozone. The oily sludge produced during the sewage treatment process of a petrochemical company in Shanghai is concentrated by sedimentation and centrifugation, and the concentration of oily sludge is prepared as follows: 20g / L. The ozone condition of micro-nano bubbles in the separation section is that the aeration rate is 0.1m 3 / h, the ozone concentration is 5ppm, and the ozone is passed into the ozone oxidation tank through the mode of micro-nano bubbles through the titanium aeration head of 0.45 μm, and the treatment time is 0.5h; the pH value of the described oily sludge is adjusted to be reduced to 3.0, and then Carry out micro-nano bubble ozone treatment in the reduction section, the condition is that the aeration rate is 1.0m 3 / h, the ozone concentration is 90ppm, the ozone is passed into the ozone oxidation tank through the 0.45μm titanium aeration head through the way of mi...

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Abstract

The invention discloses a micro-nano bubble ozone progressive sectional reduction treatment method for oily sludge and relates to the field of hazardous waste treatment. The method consists of two parts: 1, an oil-containing sludge separation section and a reduction section, wherein oily substances in the oily sludge are separated from the sludge through low-speed low-concentration micro-nano bubble ozone of the separation section, then upper-layer oil stains are removed; 2, the oily sludge enters the reduction section after the pH value is adjusted through the adjusting tank, so that sludge organic matter is oxidized through high-speed high-concentration micro-nano bubble ozone of the reduction section, and therefore the purposes of oil sludge separation and reduction are achieved. According to the invention, the ozone utilization rate and the sludge reduction effect are improved, the output sludge amount is reduced by more than 30%, and meanwhile, the total petroleum hydrocarbon in the treated oily sludge is less than 0.3%. Through two-phase progressive coupling, multiple effects of reduction, harmlessness and the like of the oily sludge can be achieved at the same time.

Description

technical field [0001] The invention relates to the field of hazardous waste treatment, in particular to a progressive stepwise reduction treatment method for oily sludge micro-nano bubble ozone. Background technique [0002] A large amount of oily sludge will be produced in oil extraction, transportation, refining and petrochemical wastewater treatment. Different from general municipal sludge, it has the characteristics of complex composition, sufficient emulsification, high viscosity and difficult dehydration, and contains hydrocarbons, Benzene series, phenols, anthracene and other substances. It is classified as hazardous waste (HW08 Waste Mineral Oil) in the National Hazardous Waste Catalog (2016 Edition). The disposal of oily sludge is mainly based on soil landfill. If the oily sludge is directly released to nature without effective treatment and disposal, it will destroy the repairability of the soil itself, and the volatile and toxic substances in the oily sludge wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/121
CPCC02F11/00C02F11/121C02F2303/06
Inventor 楼紫阳孙智毅袁海平朱南文王辉杨凯艳徐宇康
Owner SHANGHAI JIAOTONG UNIV
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