Aerobic membrane bioreactor and process

Abstract

The invention discloses an aerobic membrane bioreactor and a technology thereof. The aerobic membrane bioreactor comprises an anoxic tank, an aerobic tank and a membrane tank. The anoxic tank is provided with an upper opening and a first upper overflow port. Liquid level of the anoxic tank is higher than that of the aerobic tank. An outlet is arranged on the bottom of the aerobic tank. The outletis respectively connected to the bottom of the anoxic tank and the bottom of the membrane tank. The membrane tank is provided with a second upper overflow port. Liquid level of the membrane tank is higher than that of the aerobic tank. A membrane component is arranged in the membrane tank. The membrane tank is connected to a clean water tank. According to the invention, the membrane tank is separated from the aerobic reaction tank. The aerobic membrane bioreactor is suitable for large-batch sewage processing, and is convenient to maintain. Liquid levels of the anoxic tank and the membrane tank are higher than that of the aerobic tank, and communications between the tanks are realized through overflowing. Sludge concentration in the membrane tank can be controlled effectively. According tothe invention, high accumulating density of the components can be maintained, quality of produced water is good, area occupied by the equipment is small, amount of discharged sludge is small, nitration capacity of the bioreactor is good, and the structure of the bioreactor is simple.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an aerobic membrane bioreactor and a process for the membrane bioreactor. Background technique [0002] Membrane technology, as one of the most promising high-tech technologies in the 21st century, is called "the third industrial revolution" by environmental industry experts at home and abroad. Membrane bioreactor (MBR) technology has been developed in the past 20 years and is widely used in wastewater treatment as an engineering technology. MBR has obvious technical advantages in the future activated sludge improvement process and can be used for municipal wastewater, domestic wastewater, various The advanced treatment of a variety of industrial wastewater and slightly polluted raw water, as well as the field of sewage reuse, has a huge market capacity. [0003] The MBR system and its process have many advantages, but there are the following disadvantages: ...

AI Technical Summary

Problems solved by technology

[0003] The MBR system and its process have many advantages, but there are the following disadvantages: 1) the system has a large oxygen demand and high energy consumption; 2) the membrane surface is easy to clog; 3) the membrane module is expensive

However, in practical engineering applications, hollow fiber membranes have several obvious technical defects: 1) the fiber filaments are easily broken during the vigorous stirring process; Density, so that the fiber filaments are easily blocked by the sludge in the reaction tank, and the blockage of the junction between the membrane filaments and the sealant at both ends of the membrane module is the most common sludge blockage

After clogging, the flux of the membrane drops sharply, and the water outlet is unstable, which may easily cause fiber breakage and increase the difficulty of cleaning

Images