I. Microfiltration (MF) membrane technology1、The basic principle of microfiltration (MF)Microfiltration membranes are capable of retaining particles between 0.1 and 1 micron. MF membranes allow large molecules and dissolved solids (inorganic salts) to pass through, but will retain suspended matter, Read More

Mbr membrane contamination refers to the membrane filtration process, the water particles, colloidal particles or solute macromolecules due to physical and chemical interactions with the membrane or mechanical action caused by adsorption on the membrane surface or membrane pore, deposition caused by the filter pore size becomes smaller or blockage, resulting in membrane flux decay phenomenon. At this time it is necessary to carry out a clearing of the mbr membrane. Read More

The MBR membrane method is becoming more and more widely used and is attracting a lot of attention for its stable and clear effluent, but its huge maintenance volume is also causing many users headaches; so to minimise the intensity of maintenance work in use, the following issues need to be taken into account during the design phase. Read More

In the field of wastewater treatment and water reuse, MBR, also known as Membrane Bio-Reactor, is a new type of water treatment technology that combines membrane separation units with biological treatment units. According to the structure of the membrane can be divided into flat membrane, tubular membrane and hollow fibre membrane, etc., according to the membrane pore size can be divided into ultrafiltration membrane, microfiltration membrane, nanofiltration membrane, reverse osmosis membrane, etc.. Read More

Membranes can be prepared from a wide range of materials and can be liquid, solid or even gas phase. The majority of separation membranes used are solid phase membranes. Depending on the pore size, they can be divided into microfiltration, ultrafiltration, nanofiltration and reverse osmosis membranes; depending on the material, they can be divided into inorganic and organic membranes, with the inorganic membranes being mainly microfiltration grade membranes. The membranes can be homogeneous or non-homogeneous and can be charged or electrically neutral. Membranes widely used in wastewater treatment are mainly solid phase asymmetric membranes prepared from organic polymeric materials. Read More

Compared to many conventional biological water treatment processes, MBR has the following key advantages. Read More

Entering the mid to late 1990s, membrane - bioreactors have entered the practical application stage in foreign countries. The Canadian company Zenon first introduced the ultrafiltration tubular membrane - bioreactor and applied it to municipal wastewater treatment. In order to save energy, the company also developed the immersion hollow fibre membrane module, which has developed a membrane - bioreactor has been applied in the United States, Germany, France and Egypt and more than a dozen places, the scale from 380m3 /d to 7600m3 /d. Japan's Mitsubishi rayon company is also a well-known provider of immersion hollow fibre membrane in the world, its application in the MBR has also accumulated many years of experience, in Japan and other countries with a number of actual MBR projects. Kubota Japan is another company that is competitive in the practical application of membrane - bioreactors, producing plate membranes with high flow rates, resistance to contamination and simplicity of proces Read More

Currently in water filtration, reverse osmosis membranes and nanofiltration membranes are the most commonly used membrane elements, but many users have a vague understanding of reverse osmosis membranes and nanofiltration membranes. Today Jun Xin will introduce to you what the differences between RO and NF membranes are, as well as the commonalities and differences. Read More

The microstructure and filtration mechanism of reverse osmosis (RO) membranes, the most efficient filter membranes for contaminant retention, has been a hot topic of research. So, is an RO membrane a porous or non-porous membrane? The knowledge and answer to this question will have a direct impact on the understanding of the filtration mechanism of RO membranes. The answer to this question is changing with the advancement of technology and the deeper analysis of the microstructure of RO membranes. Read More

Reverse osmosis membranes are now used in a wide range of industries, but do you know their origins and history? This article takes you through the history of reverse osmosis membranes. Read More

The invention and large-scale application of Reverse Osmosis (RO) is a landmark achievement in the development of modern water treatment technology. As an advanced membrane separation technology developed after the 1950s, RO has been widely used in desalination, brackish water desalination, domestic water purification and wastewater reuse, etc. In 2018, more than 11 billion tonnes of desalinated water were produced worldwide using RO technology, which could be used by 320 million people. Over the past 70 years, many important scientists, entrepreneurs and a large number of technology companies have joined forces to perform a fascinating history of the development of reverse osmosis technology. Read More

Reverse osmosis technology is currently the highest of all water production technologies mastered by mankind, through reverse osmosis components to improve the purity of water, cleanliness of almost 100%, to remove impurities and salt contained in the water. In the selection of reverse osmosis equipment, we are mainly concerned with two indicators: the desalination rate and the recovery rate, the former determines the quality of the water produced and the latter determines the utilisation rate of the water. Read More

Reverse osmosis membrane is the key equipment of the reverse osmosis system, the system for a long time in continuous operation, the water calcium and magnesium plasma will be constantly precipitated and attached to the surface of the reverse osmosis membrane, the formation of scaling blocking the membrane pores, which will affect the efficiency of the reverse osmosis system water, damage to the reverse osmosis membrane. As the reverse osmosis membrane is more expensive, so in the operation of the system, to increase a section of the dosing system, water treatment equipment in the water with reverse osmosis scale inhibitor, delay the precipitation of calcium and magnesium ions and membrane surface scaling. Read More

For each membrane unit, people want it to function to the maximum, hoping for the highest desalination rate, maximum water permeability and the longest possible life. A reasonable pre-treatment is essential for the long-term safe operation of the reverse osmosis plant. Read More

Photovoltaic power generation systems can be divided into grid-connected photovoltaic power generation systems and stand-alone photovoltaic power generation systems according to whether they are grid-connected or not. Grid-connected photovoltaic power generation systems mainly refer to photovoltaic systems that are connected to the grid and receive grid dispatch, such as various centralised or distributed photovoltaic power plants. Stand-alone photovoltaic power generation systems mainly refer to a variety of photovoltaic power generation systems that operate independently of the grid, such as solar street lights, rural household photovoltaic power supply, etc. Read More