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Method for treating petroleum industrial wastewater by using complex microbial inoculant

A compound bacterial agent, a technology of the petroleum industry, applied in sedimentation treatment, water/sewage treatment, natural water treatment, etc., can solve the problems of low microbial survival and reproduction rate, large changes in water quality, equipment and pipeline blockage, etc., to reduce sludge. Yield, simplified processing, effect of reduced usage

Pending Publication Date: 2020-12-15
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that the treatment effect is not very ideal, the treatment process can only degrade one or part of the petroleum components, and the treatment result is difficult to meet the national standard
However, due to the large changes in the water quality of petroleum wastewater and poor biochemical properties, the survival and reproduction rate of conventional microorganisms is low, it is difficult to adapt to incoming water, and the treatment effect is not ideal.
Furthermore, the oil in the water body and the high viscosity of the polymer agent will cause serious blockage of equipment and pipelines.

Method used

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  • Method for treating petroleum industrial wastewater by using complex microbial inoculant
  • Method for treating petroleum industrial wastewater by using complex microbial inoculant
  • Method for treating petroleum industrial wastewater by using complex microbial inoculant

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the method for the application of the compound bacterial agent of the present embodiment to treat petroleum industry wastewater specifically comprises the following steps:

[0038] (1) Mix various bacteria in proportion to form a microbial composite bacterial agent;

[0039] Bacteria name Percent content Lactobacillus 64％ Prevotella 20％ Acetobacter 5％ Candida boidinii 1.76％ Veillonella 1.49％ Rhodospirillum 0.25％ Phosphorus accumulating bacteria 2.5％ Photosynthetic bacteria (eg: Rhodopseudomonas, etc.) 5％

[0040] (2) Mix 1 part by weight of the composite bacterial agent with 5 parts by weight of molasses and 100 parts by weight of water to prepare a solution a; place the solution a in an anaerobic environment for sealed cultivation for 5 days to obtain the activated solution a;

[0041] Take 1 part by weight of activated solution a, 0.8 parts by weight of molasses, and 50 parts b...

Embodiment 2

[0052] The method for the application of compound bacteria agent of the present embodiment to treat petroleum industry wastewater specifically comprises the following steps:

[0053] (1) Mix a variety of bacteria in proportion to form a microbial composite bacterial agent

[0054]

[0055]

[0056] (2) Mix 1 part by weight of the composite bacterial agent with 5 parts by weight of molasses and 100 parts by weight of water to prepare a solution a; place the solution a in an anaerobic environment for sealed cultivation for 5 days to obtain the activated solution a;

[0057] Take 1 part by weight of activated solution a, 1 part by weight of molasses, and 50 parts by weight of water, mix evenly, and configure solution b; place solution b in an aerobic environment for 3 days, and aerate 1-7 times a day. Inhale for 3-8 minutes to obtain the activated solution b; place the activated solution b at 36.5°C for 30 hours at a constant temperature to obtain a compound bacterial agent...

Embodiment 3

[0069] The method for the application of compound bacteria agent of the present embodiment to treat petroleum industry wastewater specifically comprises the following steps:

[0070] (1) Mix various bacteria in proportion to form a microbial composite bacterial agent;

[0071]

[0072]

[0073] (2) Mix 1 part by weight of the composite bacterial agent with 6 parts by weight of molasses and 100 parts by weight of water to prepare a solution a; place the solution a in an anaerobic environment for sealed cultivation for 5 days to obtain the activated solution a;

[0074]Take 1 part by weight of activated solution a, 0.9 parts by weight of molasses, and 50 parts by weight of water, mix evenly, and configure solution b; place solution b in an aerobic environment for 4 days, and aerate 1-7 times a day. Gas for 3-8 minutes to obtain the activated solution b; place the activated solution b at 32°C for 30 hours at a constant temperature to obtain a compound bacterial agent diluti...

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Abstract

The invention relates to a method for treating petroleum industry wastewater by using a complex microbial inoculant. The method comprises the following steps: S1, preparing a complex microbial inoculant stock solution from the complex microbial inoculant, activating, preparing a complex microbial inoculant diluent from the activated complex microbial inoculant stock solution again, and sequentially activating and culturing; S2, carrying out sludge inoculation by utilizing the cultured complex microbial inoculant diluent through a high-concentration activated sludge process to obtain high-concentration activated sludge; S3, sequentially carrying out anaerobic treatment, hydrolytic acidification treatment, aerobic treatment and precipitation treatment on the petroleum industrial wastewater;wherein in the hydrolytic acidification treatment process, the high-concentration activated sludge is added, and in the aerobic treatment process, a cultured complex microbial inoculant diluent is added; and S4, treating the effluent subjected to sedimentation treatment through a secondary sedimentation tank, a sterilization tank and an adsorption tower in sequence, and then directly discharging the effluent. Aiming at the phenomenon that the temperature of petroleum wastewater raw water is relatively high, the limitation that a conventional biochemical treatment system cannot normally work athigh temperature is broken through.

Description

technical field [0001] The invention belongs to the technical field of sewage purification and treatment, and in particular relates to a method for treating petroleum industry wastewater by using a composite bacterial agent. Background technique [0002] Petroleum refining is a comprehensive production process that uses crude oil as the main processing raw material to produce gasoline, kerosene, lubricating oil, diesel oil, benzene, toluene, xylene, ethylene, propylene, butene and other petrochemical products. According to statistics, the average consumption of fresh water per ton of crude oil processing in petroleum refining and chemical enterprises is 1.08 tons. In terms of wastewater treatment, it is an industry that is under key monitoring by the state. Petroleum refining wastewater is wastewater produced during the process of refining electrode coke from petroleum. The composition of the wastewater is relatively complex, containing a variety of inorganic and organic pol...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/36C02F101/16C02F101/38
CPCC02F9/00C02F3/348C02F3/30C02F2001/007C02F1/283C02F2103/365C02F2101/16C02F2101/38
Inventor 孙芳芳杨柳杨勇
Owner HANGZHOU DIANZI UNIV
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