MBBR and oil refining wastewater treatment system

A reactor and wastewater technology, which is applied in natural water body treatment, water treatment parameter control, biological water/sewage treatment, etc., can solve the problems of increasing water treatment costs and reducing the economic benefits of water treatment processes, and achieves low operating costs and guarantees. The effect of stable effluent quality and strong decarbonization ability

Active Publication Date: 2021-06-29
青岛万慧源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the device in Patent Document 3 can improve the tolerance of the device to a certain extent, the high-efficiency suspension carrier will increase the cost of water treatment and reduce the economic benefits of the water treatment process

Method used

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  • MBBR and oil refining wastewater treatment system
  • MBBR and oil refining wastewater treatment system
  • MBBR and oil refining wastewater treatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this example, the treatment object is the oil refinery wastewater produced by a certain factory. In the oil refinery wastewater, COD Cr The concentration is 3000mg / L, BOD 5 The concentration of sulfide is 1050mg / L, the concentration of sulfide is 35mg / L, the concentration of petroleum substances is 3000-5000mg / L, the concentration of volatile phenolic substances is 50mg / L, the concentration of ammonia nitrogen is 70mg / L, and the concentration of SS is 700mg / L.

[0054] In this example, if figure 1 As shown, the pretreatment module includes a grid channel, a water collection tank, a regulating homogeneous tank, an advection oil separation tank, a vortex concave air flotation tank and a dissolved air flotation tank connected in sequence. The anaerobic treatment module is arranged at the water outlet of the pretreatment module, and the anaerobic treatment module in this embodiment is A pool. The aerobic treatment module is arranged at the water outlet of the A pool, a...

Embodiment 2

[0068] The basic content of this embodiment is the same as that of Embodiment 1, except that in this embodiment, the volume ratio of the front-end processing unit and the back-end processing unit is 3:1. Control the wastewater flow of the front-end treatment unit to 150m 3 / h, the average concentration of DO is 2mg / L; the wastewater flow rate of the post-processing unit is controlled to be 200m 3 / h, the average concentration of DO was 2.6mg / L. Adjust the reflux ratio of the sludge so that the sludge concentration in the MBBR tank is 3.1g / L, and the pH is about 7.1 at this time. In this embodiment, the dosage of COD-degrading bacteria is 100 g of bacterial agent per ton of wastewater, and the dosage of aerobic nitrifying bacteria is 0.7 g of bacterial agent per ton of wastewater. Adjuvants used in this example are shown in Table 3.

[0069] Table 3 Example 2 Adjuvant Addition Table

[0070] Composition index parameter Vitamin E 6000mg / L Vitamin B1 ...

Embodiment 3

[0076] The basic content of this embodiment is the same as that of Embodiment 1, the difference is that in this embodiment, the volume ratio of the front-stage processing unit and the rear-stage processing unit is 4:1. Control the wastewater flow of the front-end treatment unit to 140m 3 / h, the average concentration of DO is 1.5mg / L; the wastewater flow rate of the control post-processing unit is 200m 3 / h, the average concentration of DO was 2.3mg / L. Adjust the reflux ratio of the sludge so that the sludge concentration in the MBBR tank is 3.1g / L, and the pH is about 7.1 at this time. In the present embodiment, the dosage of COD degrading bacteria is to add 25g bacterial agent per ton of wastewater, and the dosage of aerobic nitrifying bacteria is to add 0.5g bacterial agent per ton of wastewater. The auxiliary agents used in the present embodiment are shown in Table 5 Show.

[0077] Table 5 Example 3 Auxiliary Addition Table

[0078] Composition index parame...

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Abstract

The invention belongs to the field of wastewater treatment, and particularly relates to an MBBR and an oil refining wastewater treatment system. The invention provides an MBBR. Dissolved oxygen concentrations of different treatment sections are controlled according to a specific DO curve, a bacterial colony structure is adjusted, and a front-section treatment unit is used for carrying out buffer adjustment on wastewater; the microorganisms in the rear-section treatment unit further reduce COD and BOD in the wastewater, so that stable effluent quality is ensured; based on the MBBR, the invention further provides a treatment system. An A+MBBR+O combined process is matched with an efficient microbial preparation to treat the oil refining wastewater. The treatment efficiency and the impact resistance of the system are improved, the stability of the effluent quality is ensured, the impact caused by water quality fluctuation is relieved, the operation stability is improved, meanwhile, the MBBR is used as a process combining a suspension growth activated sludge method and an adhesion growth biological membrane method, the occupied area is small, the system operation cost is further reduced, and the capital construction cost is reduced.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and more specifically relates to an MBBR reactor and an oil refinery wastewater treatment system. Background technique [0002] Refining wastewater is wastewater discharged during crude oil processing and refining, containing oil, sulfur, phenol, acetone, aromatics, naphthenates, unsaturated hydrocarbons, alkalis, acids, salts and other pollutants. Oil refinery wastewater is a type of industrial wastewater with a large amount of wastewater, which has the characteristics of many types of pollutants, complex components, high toxicity and serious hazards. [0003] The traditional treatment process of oil refinery wastewater is oil separation-air flotation-biological treatment, among which the activated sludge method is the most common biological treatment. For example: in Patent Document 1, acid neutralization treatment is first performed on the alkali slag wastewater from oil refinery, followed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/30C02F101/32C02F103/36
CPCC02F3/1268C02F3/302C02F2103/365C02F2209/08C02F2209/14C02F2209/10C02F2305/06C02F2209/06C02F2101/32Y02W10/10
Inventor 焦阳
Owner 青岛万慧源环保科技有限公司
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