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El curso de desarrollo y la tendencia futura de la tecnología de membrana en la reutilización de recursos de aguas residuales

Tiempo: 2020-04-13 Hits: 47

A principios de 2000, el enfoque de la industria de tratamiento de aguas residuales comenzó a cambiar hacia la mejora de la calidad del agua, y la demanda de tecnología de membrana aumentó rápidamente. El gigante de la industria General Electric de los Estados Unidos gastó 760 millones de dólares en 2006 para adquirir Zenon Environment Inc. para obtener su tecnología de membrana de microfiltración / ultrafiltración e ingresar al mercado de tratamiento de aguas residuales. 3.2 millones de euros vendieron su negocio de tratamiento de agua a SUEZ.

 

Shuihuan Technology, un proveedor profesional de MBR en China, comprende firmemente la tendencia de desarrollo de la tecnología de membranas y ha logrado un rápido desarrollo de la empresa a través de la innovación tecnológica continua. Solo tomó diez años desde el establecimiento hasta la inclusión. En los últimos años, con la popularización del concepto global de reciclaje de aguas residuales y la introducción de plantas conceptuales de agua, la tecnología de tratamiento de aguas residuales ha dado paso a otra innovación y transformación. En esta innovación, la tecnología de membrana seguirá siendo la clave.

 


Descripción general del desarrollo de la tecnología de membranas

 

Since the discovery of infiltration by humans in 1784, membrane technology has been developing slowly for nearly two centuries. Until the 1950s, Hassler first proposed the application of membranes for desalination. With the development of materials science, membrane technology has been realized in the field of water treatment "Technology explosion". Membrane bioreactor (MBR) and reverse osmosis (RO) processes are rising rapidly in the world. Microfiltration membranes have replaced secondary sedimentation tanks, and reverse osmosis has gradually replaced traditional thermal methods as the mainstream process of seawater desalination.

 

However, after nearly 30 years of development, membrane technology has encountered bottlenecks, and problems such as membrane fouling, operating costs and membrane life have become prominent. In 2014, the first industrial-scale MBR municipal sewage treatment plant in the Netherlands chose to shut down after 8 years of operation, which caused shock in the industry. Cost and operation became the focus of the industry, and technological innovation was imminent.

 

At the same time, the concept of sewage treatment has changed in various countries. Sewage treatment plants have changed from traditional energy-consuming households to resource recycling stations, and water treatment enterprises have also transformed from original energy consumers to resource producers. Under this big trend, what kind of membrane technology can meet the demand? Perhaps it is a question that every membrane technology practitioner needs to think about.

 Three major application areas of membrane technology

 

Municipal wastewater treatment-membrane bioreactor (MBR) process

 

Microfiltration membrane (MF) and ultrafiltration membrane (UF) have been successfully widely used in MBR municipal sewage treatment process, the membrane pore size is between 0.02-0.4 μm, the membrane material is mainly PVDF, and the membrane configuration mainly uses hollow fiber membrane Or flat film. According to statistics, as of 2017, there are more than 200 MBR municipal sewage treatment plants with a capacity of more than 10,000 tons in China. It is expected that by the end of 2018, the cumulative treatment capacity of the MBR system in China will be as high as 14 million tons per day. In depth, this number is still growing rapidly.

 

MBR market suppliers mainly include SUEZ, Mitsubishi, Bishuiyuan, Asahi Kasei, Tianjin Membrane, etc. In the past ten years, Chinese companies represented by Bishuiyuan have paid attention to independent research and development, breaking through the technical barriers of a few developed countries, and have mastered the most advanced MBR membrane material preparation methods. With 24 MBR projects, it has become the company with the largest number of MBR projects in the world.


 

MBR membrane module