Why do the seals in reverse osmosis equipment swell?Water treatment equipment in reverse osmosis equipment in order to achieve the membrane shell between the zones of sealing isolation, the membrane shell requires three types of sealing rubber ring. In order to reduce the installation resistance sys Read More

How do I know which cleaning method to use to clean my membrane system?In order to get the best cleaning results, it is important to choose the right cleaning agent and cleaning procedure, as incorrect cleaning can actually deteriorate the system performance.Why is the pH of the RO produced water lo Read More

What is the relationship between influent TDS and conductivity?When a feed water conductivity value is obtained, it must be converted to a TDS value so that it can be entered in the software design. For most water sources, the conductivity/TDS ratio is between 1.2 and 1.7. For ROSA design, a ratio o Read More

Question 1:‍What are the precautions for the preservation of membrane components?Do not remove the protective film of the membrane module package.When storing, it must be placed in a ventilated, dry place without corrosive gases.The suitable storage environment temperature range is 5~40℃.Membrane mo Read More

Treat high turbidity water with a membrane designed for greater solid tolerancesVeolia's（Suez） immersed ZeeWeed 500 membrane is specifically designed for difficult-to-treat water sources. Drinking water, wastewater, water reuse, and industrial applications can all benefit from Veolia's strongest Zee Read More

What is the maximum allowable downtime without system flushing?If the system uses scale inhibitor, when the water temperature is between 20 and 38°C, about 4 hours; below 20°C, about 8 hours; if the system does not use scale inhibitor, about 1 day.Can the reverse osmosis pure water system be started Read More

What kind of pretreatment is generally required for RO systems?The usual pre-treatment system consists of the following, coarse filtration (~80 microns) to remove large particles, addition of oxidants such as sodium hypochlorite, followed by precision filtration through a multi-media filter or clari Read More

What kind of separation capability does membrane technology have?Reverse osmosis is currently the most sophisticated liquid filtration technology, reverse osmosis membrane for dissolved salts and other inorganic molecules and molecular weight greater than 100 organic substances to play a retention r Read More

1、How often should the reverse osmosis system be cleaned?In general, when the standardized flux decreases by 10-15%, or the system desalination rate decreases by 10-15%, or the operating pressure and differential pressure between segments increases by 10-15%, the RO system should be cleaned.Cleaning Read More

Wastewater, usually the discharged water from domestic and production sources, is subject to some pollution. The main types of sewage are domestic sewage, industrial wastewater and initial rainwater. The main pollutants of sewage are pathogenic pollutants, oxygen-consuming pollutants, plant nutrient Read More

Hollow fibre membranes are membranes that are fibre-like in shape and self-supporting. Hollow fibre membranes are made from polysulfone and dimethylacetamide, which are processed into fibrous filaments with a hollow inner cavity, and then divided by a highly permeable polymer, which has selective pe Read More

The smallest unit of a membrane separation plant is called a membrane module, or in the case of rolled membranes, usually a membrane element.The design of the membrane module has to achieve two objectives.(i) To limit the occurrence of concentration polarisation (desalination membranes) and particle Read More

In recent years, the MBR process has been widely used, with water reuse going on, upgrading and renovation going on, and decentralised treatment also going on... As we all know, this is mainly due to its high load, long sludge age, high efficiency interception, occupying less land and other outstand Read More

In addition to nanomaterial-doped NF membranes, the preparation of high-performance polyamide NF membranes with an interlayer structure has received increasing attention in recent years. The interlayer structure of this membrane can be uniformly covered/deposited onto the substrate to form a multila Read More

Common nanocomposite NF membranes can be classified as surface coated NF membranes (SLN), polyamide layer nano-doped membranes (TFN) and nanomaterial hybrid matrix membranes (TFCn). The structure and main properties of these three types of membranes are shown in Table 2. SLN membranes can be obtaine Read More