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Marine platform domestic wastewater grading treatment method

A technology for offshore platforms and domestic sewage, applied in water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of unfulfilled water resource utilization, excessive discharge, and unstable treatment effect etc. to achieve the effect of easy cleaning, effective handling and high mechanical strength

Pending Publication Date: 2020-03-31
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing treatment scheme has not realized the full utilization of water resources, and the treatment effect is unstable, and there are cases of excessive discharge

Method used

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  • Marine platform domestic wastewater grading treatment method
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Embodiment 1

[0030] For a fixed facility in the Bohai Sea, the volume of black water is 18-24m3 / d, and the volume of gray water is 29-34m 3 / d, the source of black water for toilet flushing is sea water, the COD concentration is between 650-720mg / L, the suspended solid concentration is between 300-480mg / L, the gray water COD is 132-1251mg / L, and the suspended solid concentration is 26~ between 45mg / L; using the present invention "a method for the separation and treatment of domestic sewage on offshore platforms", the residence time of black water in the collection tank is 1.5 hours, the diameter of the filter screen is 0.5mm, and the residence time in the three-dimensional electrocatalysis is 25 minutes , the effluent COD≤125mg / L, BOD5≤25mg / L, SS≤15mg / L, the number of heat-resistant coliforms≤100 / L, to achieve discharge standards. After the kitchen gray water passes through the oil skimmer and the shower gray water passes through the hair filter, it enters the gray water collection tank af...

Embodiment 2

[0032] For a fixed facility in the South China Sea, the volume of black water is 9-10.5m3 / d, and the volume of gray water is 18-25m3 / d, the black water flushing source is sea water, the COD concentration is between 560-810mg / L, the suspended solid concentration is between 260-390mg / L, the gray water COD is 116-958mg / L, and the suspended solid concentration is 19~ between 34mg / L; using the present invention "a domestic sewage separation treatment method on offshore platforms", the residence time of black water in the collection tank is 1 hour, the diameter of the filter screen is 0.5mm, and the residence time in the three-dimensional electrocatalysis is 23 minutes , effluent COD≤125mg / L, BOD 5 ≤25mg / L, SS≤15mg / L, and the number of heat-resistant coliforms ≤80 / L, achieving emission standards. After the kitchen gray water passes through the oil skimmer and the shower gray water passes through the hair filter, it enters the gray water collection tank after confluence. After stayi...

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Abstract

The invention discloses a marine platform domestic wastewater grading treatment method for grading treatment of black water and ash water generated from a marine platform, wherein the black water is sent to a black water collection tank in which a filter screen is mounted, so that suspending substances are blocked thereby, and filtered water self-flows into a three-dimensional electrocatalytic reactor for degrading organic substances, qualified water being discharged after reaching standard; sludge generated from the black water is dehydrated, and the dry sludge is transported to land for treatment at fixed period, and a filtrate is fed back to the black water collection tank; the kitchen ash water is skimmed to remove oil dirt by a skimmer and is fed to an ash water collection tank, bathash water is treated through a hair filter and is fed to the ash water collection tank, wherein the two ash water flows are homogenized and mixed in the ash water collection tank and is treated by anelectrolytic reactor to remove organic substances and to be disinfected; the output water is treated through a superfiltering device to remove the harmful substances until recycling standard is reached. Through the grading treatment, reliability of qualified emission of the wastewater is improved, and reasonable utilization of water source is achieved.

Description

technical field [0001] The invention belongs to the field of environmental engineering sewage treatment, and in particular relates to a method for separating and treating domestic sewage on an offshore platform. Background technique [0002] Domestic sewage on offshore platforms includes black water and gray water, of which black water comes from toilet flushing water and sewage from medical offices, and gray water comes from sewage from bathrooms, washrooms, kitchens and laundry rooms. At present, the domestic sewage generated by manned platforms / FPSOs in all sea areas is basically treated according to the requirements of the sea area where they are located, and then discharged into the sea after reaching the standard. "Electrolysis" or "biochemical" devices are mostly used in domestic sewage treatment systems in the Bohai Sea area, and "biochemical" treatment devices are mostly used in domestic sewage treatment systems in the South China Sea / East China Sea / Beibu Gulf. row...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/001C02F1/46C02F1/40C02F1/444C02F1/4674C02F2103/005C02F2103/002
Inventor 赵慧谢陈鑫滕厚开钱光磊任春燕雷太平李旗周立
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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