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Advanced treating device and treating method of salty domestic sewage in ships

A technology for domestic sewage and advanced treatment, applied in water/sewage multi-stage treatment, light water/sewage treatment, water/sludge/sewage treatment, etc. problems, to achieve the effect of reducing excess sludge production, increasing stability and reducing load

Inactive Publication Date: 2012-07-11
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, due to the lack of strict requirements on the discharge of domestic sewage generated by ships, some ships only installed simple sewage treatment or sewage collection devices, and even many ships did not install sewage treatment devices
[0003] Some existing ship domestic sewage treatment devices mainly use aerobic biodegradation of pollutants in the sewage, and use sedimentation tanks for mud-water separation. The disadvantages of this type of device are: large volume, occupying limited space on the ship; mud-water separation effect is affected Due to the influence of ship swaying, the quality of effluent water is unstable; the volume is heavy, which increases the energy consumption of the ship's operation

Method used

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  • Advanced treating device and treating method of salty domestic sewage in ships
  • Advanced treating device and treating method of salty domestic sewage in ships
  • Advanced treating device and treating method of salty domestic sewage in ships

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Treat 2 tons of domestic sewage every day, the influent COD is 300mg / L-500mg / L, and the pH value is 6-9. The domestic sewage generated in the bathroom and kitchen directly enters the solid-liquid separator, or is collected by the collection tank and then pumped Enter the solid-liquid separator, the large solid matter in the sewage is intercepted by the solid-liquid separator, and then the liquid enters the hydrolysis acidification unit, stays in this unit for 2.5 hours, enters the contact oxidation chamber, the effective residence time is 3 hours, and then the sewage enters The membrane bioreactor unit stays here for 2 hours, and the effluent from the membrane bioreactor enters the ultraviolet sterilizer for sterilization and disinfection. The sludge is returned from the membrane bioreactor to the hydrolysis acidification tank, and the return ratio is 60%-100%. The operation mode of the membrane module is to pump water intermittently, run for 8 minutes, stop for 2 minut...

Embodiment 2

[0037] 10 tons of domestic sewage are treated every day, the influent COD is 300mg / L-500mg / L, and the pH value is 6-9. The domestic sewage generated in the bathroom and kitchen directly enters the solid-liquid separator. The large solid matter in the sewage is intercepted by the solid-liquid separator, and then the liquid enters the hydrolysis acidification unit, stays in this unit for 2.5 hours, enters the contact oxidation chamber, and the effective residence time is 3 hours, and then the sewage enters the membrane bioreactor unit, The residence time here is 3 hours, and the effluent from the membrane bioreactor enters the ultraviolet sterilizer for sterilization and disinfection treatment. The sludge is returned from the membrane bioreactor to the hydrolysis acidification tank, and the return ratio is 60%-100%. The operation mode of the membrane module is to pump water intermittently, run for 8 minutes, stop for 2 minutes, when the suction pressure of the membrane module re...

Embodiment 3

[0039] 20 tons of domestic sewage are treated every day, the influent COD is 300mg / L-500mg / L, and the pH value is 6-9. The domestic sewage generated in the bathroom and kitchen directly enters the solid-liquid separator. The large solid matter in the sewage is intercepted by the solid-liquid separator, and then the liquid enters the hydrolysis acidification unit, stays in this unit for 1.5 hours, enters the contact oxidation chamber, and the effective residence time is 3 hours, and then the sewage enters the membrane bioreactor unit, The residence time here is 3 hours, and the effluent from the membrane bioreactor enters the ultraviolet sterilizer for sterilization and disinfection treatment. The sludge is returned from the membrane bioreactor to the hydrolysis acidification tank, and the return ratio is 60%-100%. The operation mode of the membrane module is to pump water intermittently, run for 8 minutes, stop for 2 minutes, when the suction pressure of the membrane module re...

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Abstract

The invention provides an advanced treating device and a treating method of salty domestic sewage in ships. The treating device comprises a solid-liquid separator, a hydrolysis acidizing pool, a biological immobilizing chamber, a membrane bioreactor, an ultraviolet sterilizer and water collecting pool which are successively connected in series between a sewage inlet and a treated water outlet. The treating method comprises the following steps: the sewage firstly enters the solid-liquid separator soaked on the upper part of the hydrolysis acidizing pool through a water inlet pipe; solid foreign matters with slightly solubility are captured in the separator; the residence time of the sewage in the hydrolysis acidizing pool is 2 to 3 hours; the residence time of the sewage in the biological immobilizing chamber is about 3 hours; and a film assembly is soaked in activated sludge mixed liquor to be subject to the sludge-water separation, and the residence time of the sewage is about 2 to 3hours. The device has the advantages of compact structure, ship swaying resistance, no excess sludge discharge in a long term, stable water quality of the discharged water and the like, and the device is suitable for the growth of salt-resistance microorganisms. The water quality of the discharged water can reach the Maritime Environment Protection Committee (MEPC). 159(55) discharging requirements revised by the maritime environment protection committee of the internal maritime organization on October, 2006.

Description

technical field [0001] The invention relates to a sewage treatment device, and the invention also relates to a sewage treatment method. In particular, a treatment device and method for treating salty domestic sewage from ships. Background technique [0002] With the development of ocean and river resources and the development of shipping industry, the pollution of receiving water by domestic sewage generated by ships has been paid more and more attention. In the past, due to the lack of strict requirements on the discharge of domestic sewage generated by ships, some ships only installed simple sewage treatment or sewage collection devices, and even many ships did not install sewage treatment devices. [0003] Some existing ship domestic sewage treatment devices mainly use aerobic biodegradation of pollutants in the sewage, and use sedimentation tanks for mud-water separation. The disadvantages of this type of device are: large volume, occupying limited space on the ship; mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/32
Inventor 赵方波乔英杰邱峰史凤娇
Owner HARBIN ENG UNIV
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