Combined type MBR (membrane bioreactor) sewage treating and recycling device for offshore platform

Abstract

The invention relates to a combined type MBR (membrane bioreactor) sewage treating and recycling device for an offshore platform, belonging to the technical field of environmental engineering. The combined type MBR sewage treating and recycling device for the offshore platform comprises three box bodies, wherein the box body I is an oil separation tank, wherein an oil retaining clapboard and an oil skimmer are arranged in the oil separation tank, and the oil separation tank is provided with a water outlet communicated with an adjusting tank; the box body II is internally provided with a septic tank and an adjusting tank at intervals, wherein the upper part of the septic tank is provided with a water outlet pipe communicated with the adjusting tank, a coarse grid and an overflow pipe are arranged in the adjusting tank, and the bottom of the septic tank is provided with a sewage submersible pump and a water outlet pipe; and the box body III is internally provided with a hydrolyzed acidification tank and an MBR tank at intervals, wherein the hydrolyzed acidification tank is internally provided with a fine grid, the upper part of the hydrolyzed acidification tank is provided with a water outlet pipe communicated with the MBR tank, an MBR membrane assembly is arranged in the MBR tank, a water collection pipe at the upper part of the MBR membrane assembly is communicated with a recycled water pump, and an aerator pipe at the bottom of the membrane assembly is communicated with a fan. The combined type MBR (membrane bioreactor) sewage treating and recycling device has the advantages of simple structure, high-efficiency energy saving, running continuity and stability, rapidness in assembly, control automation, convenience for operation, and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, in particular to a combined MBR sewage treatment and recycling device for offshore platforms. Background technique [0002] Offshore oil production platform groups generally have at least one staff life support system, and this system is embodied in the life module. The domestic sewage of the platform mainly has the following sources in the living module: 1. Toilet discharge water; 2. Bath discharge water; 3. Washing discharge water; 4. Kitchen discharge water; 5. Central air-conditioning discharge water. With the development of offshore oil, more and more attention has been paid to the pollution of marine environment by domestic sewage on offshore platforms. [0003] Traditional platform domestic sewage treatment methods are mainly divided into three categories according to different principles: physical chemical method, biochemical method and electrolytic method. At present,...

AI Technical Summary

Problems solved by technology

The physical and chemical method has small volume, small running and no-load quality, and convenient operation; but a large amount of chemicals are added, the operating cost is high, the device is easy to block, and it needs to be cleaned regularly

The biochemical method has low investment and low operating costs, and is the most widely used; however, the device is bulky, the platform after construction is inconvenient to install, the type of sewage to be treated is single, the impact load resistance is poor, and regular cleaning is required

The electrolysis method has the advantages of small size, small operation and no-load mass, comprehensive types of sewage treatment, system startup at any time, simple operation and maintenance, but large one-time investment and high operating costs

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