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Efficient treatment apparatus and method for sewage and wastewater

A treatment equipment and treatment method technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Water injection index requirements and other issues

Inactive Publication Date: 2014-02-26
HEILONGJIANG MINGFENG ENVIRONMENT PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ternary produced water contains a large amount of polymer (polyacrylamide) and petroleum sulfonate, which is much more difficult to treat than water flooded produced water, and oil-water separation is more difficult
Ternary wastewater from oilfields has complex water components, high salinity, a large amount of oil-containing polymer residue and other pollutants, and the water has high viscosity, polymer molecular weight, and complex structure. It is difficult to use conventional methods to break chains and reduce viscosity, resulting in ternary Water cannot be recycled, resulting in waste of water resources and serious environmental pollution
[0004] In the case of petroleum sulfonates and polymers in the water, conventional treatment methods and processes are difficult to meet the requirements of the reinjection water index; even if the treatment index requirements are met, there are problems such as large footprint and long treatment process; therefore, other methods are used Treatment process for advanced treatment of incoming water

Method used

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  • Efficient treatment apparatus and method for sewage and wastewater
  • Efficient treatment apparatus and method for sewage and wastewater
  • Efficient treatment apparatus and method for sewage and wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Screening, Identification, Cultivation and Preservation of Example 1 Bacterial Strain

[0072] Selective medium: polyacrylamide 1.5g, ammonium chloride 0.11g, potassium dihydrogen phosphate 0.09g, magnesium sulfate 0.13g, sodium bicarbonate 0.22g, calcium chloride 0.03g, distilled water 1000mL;

[0073] Solid medium for selective medium: polyacrylamide 1.5g, ammonium chloride 0.11g, potassium dihydrogen phosphate 0.09g, magnesium sulfate 0.13g, sodium bicarbonate 0.22g, calcium chloride 0.03g, agar 15g, distilled water 1000mL

[0074] Basal medium: 3g of beef extract, 10g of peptone, 1L of distilled water, 5g of NaCl, the pH value is 7.0-7.2, and the amount of agar added is 15g / L.

[0075] (1) Screening and identification of strains

[0076] The activated sludge from a sewage treatment plant in Daqing Oilfield was inoculated into polyacrylamide selective medium and cultured at 30°C for 2 days, and the mycelium was picked and streaked on the solid medium of selective me...

Embodiment 2

[0089] Efficient wastewater treatment equipment, see figure 1 , including a water inlet pump 12 , an oil collector 1 , a biological purification-oxidation device 2 , a filtering device 3 , a backwash tank 4 , and a backwash pump 13 connected in sequence. The biological purification-oxidation device 2 is a first biological purification device 5 , a first solid-liquid separation device 6 and a first oxidation device 7 connected in sequence.

[0090] The oil collection device 1 is a micro-air floating dispersed oil collection device; the bottom of the oil collection device 1 is provided with a first aeration device, the upper part is provided with a waste oil recovery port, the upper part of the side wall is provided with a water inlet, and the lower part of the side wall is provided with a water outlet . The biological purification device is a contact oxidation tank, the bottom of the biological purification device is equipped with a second aeration device, the interior is equi...

Embodiment 3

[0102] Efficient wastewater treatment equipment, see figure 2 , including a water inlet pump 12 , an oil collector 1 , a biological purification-oxidation device 2 , a filtering device 3 , a backwash tank 4 , and a backwash pump 13 connected in sequence. The biological purification-oxidation device 2 is a first oxidation device 7 , a first biological purification device 5 and a first solid-liquid separation device 6 connected in sequence.

[0103] The oil collection device 1 is a micro-air floating dispersed oil collection device; the bottom of the oil collection device 1 is provided with a first aeration device, the upper part is provided with a waste oil recovery port, the upper part of the side wall is provided with a water inlet, and the lower part of the side wall is provided with a water outlet . The biological purification device is a contact oxidation tank, the bottom of the biological purification device is equipped with a second aeration device, the interior is equ...

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Abstract

The invention provides an efficient treatment apparatus for sewage and wastewater. The apparatus comprises an oil-receiving device (1), a biological purification-oxidation device (2) and a filtration device (3) which are connected successively. The invention also provides a method for treating the sewage and wastewater efficiently by using the above apparatus. The apparatus is convenient for use, low in operation cost, good in treatment effect and high in treatment efficiency. Through combination of the oil-receiving device, the biological purification-oxidation device and the filtration device, pollutants in sewage such as ternary sewage, oil-containing sewage with high polymer-bearing concentration (higher than 500 mg / L) and high viscosity, oil-containing sewage with low polymer-bearing concentration (lower than 500 mg / L), an accumulating region waste liquid and chemical wastewater can be degraded and removed effectively, so that the sewage can be purified.

Description

technical field [0001] The invention belongs to the field of oilfield sewage and wastewater treatment, and in particular relates to a high-efficiency treatment equipment for sewage and wastewater, and also relates to a method for treating oilfield ternary sewage. Background technique [0002] Polymer flooding technology is a widely used oil recovery technology. High-quality polymer flooding can improve the oil-water mobility ratio and expand the swept volume, thereby improving oil recovery and effectively reducing oil recovery costs. It is of great significance to maintain high and stable oilfield production. However, with the large-scale industrialization of polymer flooding applications, oilfields consume more and more clean water, and at the same time cause a large amount of sewage to be discharged due to excess, especially similar polymer injection fluids and polymer flooding well waters that contain A large amount of pollutants such as oil-containing polymer residues, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 冯明良孙贤波冯子妍汪俊斌
Owner HEILONGJIANG MINGFENG ENVIRONMENT PROTECTION SCI & TECH
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