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Oily sludge treatment method

A sludge treatment and sludge technology, which is applied in biological sludge treatment, dewatering/drying/concentrating sludge treatment, and oxidation treatment of sludge, etc., can solve problems such as inability to effectively treat oily sludge, and achieve oil removal efficiency. High, short processing cycle, stable operation effect

Pending Publication Date: 2022-07-01
GUANGZHOU SINOVAST ENERGY ENVIRONMENT GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problem that the prior art cannot effectively treat oily sludge, the object of the present invention is to provide a treatment method for oily sludge

Method used

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Embodiment 1

[0048] Taking the cleaning sludge and floor sludge of a branch of Sinopec as the treatment object, it is preliminarily determined that the oil content of the mixed sludge of the cleaning sludge and the floor sludge is between 25% and 35%. After that, the salinity of the mixture is between 10% and 25%. with attached figure 2 The process flow shown is for oily sludge treatment.

[0049] Take 2 tons of oily sludge and clean water / recycled water in a volume ratio of 1:3 after removing large debris and homogenizing, and uniformly mix them in an aerobic tank for aerobic treatment, and add 10% of the treated oily sludge to the ocean. Oil-tolerant bacteria, marine oil-tolerant bacteria are mainly composed of Acinetobacter venetianus, Bacillus pumilus, Marinobacter hydrocarbonoclasticus, Alcanivorax sp., marine oil-tolerant bacteria were purchased from marine microorganisms in China Culture Collection Management Center (MCCC), the MLSS in the aerobic tank is controlled at 0.5-1.0g / L...

Embodiment 2

[0056] Taking the cleaning sludge and floor sludge of a branch of Sinopec as the treatment object, it is preliminarily determined that the oil content of the mixed sludge of the cleaning sludge and the floor sludge is between 25% and 35%. After that, the salinity of the mixture is between 10% and 25%. The treatment process is attached figure 2 , using conventional aerobic activated sludge instead of marine oil-tolerant bacterial agent for technical comparison.

[0057] Take 2 tons of oily sludge and clean water / recycled water in a volume ratio of 1:3 after removing large debris and homogenizing, and uniformly mix them in an aerobic tank for aerobic treatment, according to 10%-20% of the treated oily sludge volume Add oxygen activated sludge, the aerobic activated sludge is the sludge in the aerobic tank of the rural domestic sewage treatment plant. The environmental factors such as MLSS, pH, water temperature, DO in the aerobic tank are the same as those in Example 1, and th...

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Abstract

The invention discloses an oily sludge treatment method which comprises the following steps: (1) carrying out aerobic treatment on oily sludge to obtain a sludge-water mixture; (2) carrying out air flotation treatment on the mud-water mixture to obtain oily mud water and oily wastewater; part of the oily muddy water flows back to the step (1), and the remaining oily muddy water is subjected to chemical oxidation treatment to obtain oil-removed sludge; the oily wastewater is subjected to Fenton oxidation treatment, part of the oily wastewater subjected to Fenton oxidation flows back to the step (1), and the remaining part of the oily wastewater is discharged; in the step (1), offshore oil tolerant bacteria are added in the aerobic treatment process. An aerobic treatment and chemical oxidation coupling process is adopted, the method is applied to a high-oil-content and high-salt-content environment, harmless treatment of the oil sludge and recovery of petroleum resources are achieved, and the whole process is stable in operation, easy and convenient to operate, short in treatment period, high in oil removal efficiency and good in environmental tolerance.

Description

technical field [0001] The invention relates to the technical field of solid waste, in particular to a method for treating oily sludge. Background technique [0002] Oily sludge is a solid or semi-solid stable emulsion system composed of petroleum hydrocarbons, water, solid particles and other substances (such as heavy metals), mainly from crude oil extraction, oil and gas storage and transportation, and refinery crude oil storage and transportation. sewage treatment process. Oil sludge not only contains a large amount of crude oil, wax, asphaltene, colloid and other substances, but also contains benzene series, phenols, anthracene, pyrene and other toxic and harmful substances, and the harmful microorganisms symbiotic in the sludge are mostly pathogenic bacteria. Due to the complex composition of sludge, the difficulty of dehydration, and the presence of flammable and explosive substances, the choice of treatment process needs to be very careful. [0003] At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F11/06C02F11/12
CPCC02F11/02C02F11/06C02F11/12
Inventor 梁晓晖刘晓永陈燕娜袁芳吴栋颢陈琴
Owner GUANGZHOU SINOVAST ENERGY ENVIRONMENT GRP
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