Minden kategória

Szakmai hírek

Főoldal>Hírek>Szakmai hírek

A membrántechnika fejlesztési folyamata és jövőbeli tendenciái a szennyvízforrások újrahasznosításában

Idő: 2020-04 13- Találat: 12

In early 2000, the focus of the sewage treatment industry began to shift to the improvement of water quality, and the demand for membrane technology increased rapidly. Industry giant General Electric of the United States spent 760 million US dollars in 2006 to acquire Zenon Environment Inc. to obtain its microfiltration / ultrafiltration membrane technology and enter the sewage treatment market. 3.2 billion euros sold its water treatment business to SUEZ.

Shuihuan Technology, a professional MBR supplier in China, firmly grasps the development trend of membrane technology and has achieved rapid development of the enterprise through continuous technological innovation. It took only ten years from establishment to listing. In recent years, with the popularization of the global sewage recycling concept and the introduction of conceptual water plants, sewage treatment technology has ushered in another innovation and transformation. In this innovation, membrane technology will remain the key.

Overview of membrane technology development

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