Reverse Osmosis Membrane Recovery of Industrial Waste Water

The Ulp31 - 4040 Reverse Osmosis membrane was an ultra-low pressure composite membrane developed by Times Wharton. It has an ultra-low operating pressure, and under the ultra-low operating pressure, it can achieve the same high water flux and high rejection rate as the conventional low-pressure membrane. Its operating pressure is about 2/3 of the operating pressure of the conventional low-pressure composite membrane. The membrane is suitable for the desalination of surface water, underground water, tap water, municipal water and other water sources with a salt content of less than 2000pm. It is mainly used in various fields such as pure water, boiler feed water, food processing and pharmaceutical manufacturing industries. The Huitong membrane should have the following characteristics: it should have a high-efficiency desalination rate at high flow rates; it should have high mechanical strength and service life; it can function under low operating pressure; it can withstand the influence of chemical or biochemical effects; it is less affected by factors such as the pH value and temperature; the raw materials for making the membrane are easy to obtain, the processing is simple, and the cost is low. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The industrial Reverse Osmosis device was a device that used a semi-transparent membrane to produce pure water from saltwater under the effect of a pressure difference. Its principle was the opposite of natural infiltration, and it was also known as reverse infiltration. It could achieve the purpose of separation, extraction, purification, and concentration by reverse infiltration, which was greater than the permeate pressure, according to the permeate pressure of different materials. The industrial Reverse Osmosis device can remove more than 97% of dissolved salt and more than 99% of colloid, microorganisms, particles, and organic matter in water. It is the best equipment for modern pure water, high-purity water, and space water (ultra-pure water) projects. It has the characteristics of low energy consumption, no pollution, simple process, high water quality and easy operation and maintenance. In industrial applications, the raw water will first be pre-treated by fine filter, particle activated carbon filter, compressed activated carbon filter, etc., and then pumped with a small pore size.(1/10000 um) Reverse Osmosis membrane, which can turn high-concentration water into low-concentration water, and at the same time isolate industrial impurities, heavy metals, bacteria, viruses and other impurities mixed into the water, so that the produced water can meet the physical and chemical indicators and hygiene standards of relevant drinking regulations, or meet the needs of industrial production (such as electronics, medicine, food, light textile, chemical, power generation, etc.) for high-purity water. During the operation, all kinds of raw water contained a certain concentration of suspended substances and dissolved substances, which may cause membrane contamination. For example, there were biological particles such as mineral salt, colloid, microorganisms, algae, etc. in suspended matter, easily dissolved salt (such as chloride-based), hardly dissolved salt (such as carbonate-based, sulfate-based, and silicite-based), metal oxide-based, acid and base, etc. in dissolved matter. Membrane pollution will lead to deterioration of system performance. For example, suspended particles deposited on the membrane will block the intake passage and increase the friction resistance (pressure drop); when the indissolvable salt exceeds the saturation limit, it will form scale on the membrane surface, reducing the flux of the membrane, increasing the operating pressure and pressure drop, and causing the product water quality to decline. In order to reduce membrane pollution, it is necessary to pre-treat the water. The effect of the pre-treatment is reflected in the reduction of the absolute value of the water quality indicators of TSS, Toc, Sludge, Bod, LSi, iron, Mn, aluminum, Si, Ba, Stronghold, and so on. In addition, it is necessary to reduce the PDI as much as possible (the ideal PDI (15 minutes) value should be less than 3). In addition, in order to improve the operational performance of the reverse infiltration system, chemicals such as acid, base, disinfectant, scale inhibition agent, and dispersing agent can also be added to the feed water. For example, adding acid (commonly used sulfuric acid or sulfuric acid) can reduce the ph and prevent the scaling of calcium carbonate; adding base (commonly used soda) can increase the ph and improve the removal rate in the secondary ro system; adding dechlorination agent can eliminate residual chlor, etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Reverse Osmosis system membrane cleaning agents include acidic cleaning agents, basic cleaning agents, and many other types. An acidic cleaner such as the RO-membrane cleaning agent was mainly composed of a weakly acidic organic acid. It could remove iron dioxide silt and also had a good removal effect on light scale such as calcium dioxide. However, before using it, it was necessary to ensure that the organic matter in the membrane tube had been removed. For example, MC103, which is suitable for aromatic polyamide-based reverse infiltration membranes, hollow fiber membranes, nanofiltration (HF), and ultrafiltration-based membranes. It can dissolve metal whiskers, calcium carbonates, and other types of scaling. The excellent cleaning effect can extend the service life of the membrane. Alkaline cleaners such as MC511, product features include the best effect when used with cleaner MC103 and disinfectant MC881, especially effective in removing oil and other organic matter, and good removal of biological mucus. It is a liquid formula with a high pH value. It is mainly used to remove organic matter, sludge, and other particles attached to the surface of the membrane. It is suitable for use in aromatic polyamide-based reverse infiltration membranes, hollow fiber membranes, nano-membranes, and ultra-membranes. The excellent cleaning effect can extend the operation time of the membrane. From the perspective of environmental protection, when choosing a reverse infiltration membrane cleaner, in addition to considering the cleaning ability, it was also necessary to pay attention to whether it was environmental friendly. Traditional reverse infiltration agents may contain substances harmful to the human body and the environment, such as heavy metals, toxic organic substances, etc., which are prone to secondary pollution. High-quality environmental cleaning agents should comply with environmental pollution control standards and use standards, do not contain harmful substances, and do not produce secondary pollution during use. At the same time, different materials and characteristics of the reverse infiltration membrane had different requirements for the agent. The cleaning agent had to have good compatibility to avoid excessive damage to the membrane and affect the system performance. During the use process, one also had to pay attention to factors such as the stability and concentration control of the medicine. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The industrial secondary reverse infiltration equipment consisted of a two-stage Reverse Osmosis device, a cleaning system, and a middle water tank. The working principle was that after the first level of purified water passed through the water to adjust the PH value, the second level of high-pressure water pump was sent to the second level of reverse infiltration system to obtain the water. Different processes were selected for different raw water quality. It can remove more than 98% of dissolved salt and more than 99% of colloid, microorganisms, particles and organic matter in water. It is the best equipment for modern pure water and space water (ultra-pure water) projects. It has the advantages of low energy consumption, small equipment volume, simple process, convenient operation and maintenance, no pollution, strong adaptability, wide application range, etc. The two-stage reverse infiltration equipment (namely, the two-stage reverse infiltration equipment) system includes a pre-treatment part (a pressurizing pump, a precision Quartz sand filter, a high-quality activated carbon absorption filter, and a 5-um security filter), and a reverse infiltration part (an equipment electric control, a first-stage high-pressure water pump, a first-stage RO-component, a second-stage high-pressure water pump, a second-stage RO-component, and a control sensor). The RO-pure water enters the pure water tank for backup, and then the pure water is transported to the water point by the pure water pump. It is suitable for users with poor water quality or high water quality requirements. When the temperature is above 25 degrees Celsius, the water conductivity can be guaranteed to be within 2us/cm, the equipment utilization rate exceeds 75%, and the water conductivity reaches 98%. The process was as follows: raw water pressurizing pump, multi-media filter, activated carbon filter, water softening device, security filter, first-stage reverse infiltration machine, second-stage reverse infiltration machine, water storage tank, pure water delivery pump, and water point. Different grades of water have different water standards, such as grade 1 water>10M Omega; grade 2 water>1M Omega; grade 3 water> 0.2 M Omega, etc.(other indicators such as the PH range (25 ° C) of 5.0 - 7.5). The application fields include the preparation of pure water and ultra-pure water in electronics, medical treatment, food, boiler feed water and other industries, the preparation of space water and distilled water, the purification of beer and beverage water, the pre-desalt treatment of high-pressure boiler feed water, the desalt and desalt of seawater and brackish water, the separation, concentration and liquid color removal processes in pharmaceutical, textile, chemical, food and other industries, and the recovery and application of useful substances in water solutions in industrial production. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The Tao Reverse Osmosis membranes were widely used in seawater desalination, drinking water treatment, industrial waste water treatment, food and beverage production, medicine, and biotechnology. In terms of drinking water treatment, it can effectively remove suspended substances, bacteria, viruses, heavy metals, drug residue, organic matter and other impurities in the water to provide safe and clean drinking water. In industrial production, the water quality requirements are usually very high. It can be used to treat industrial waste water, circulating cooling water, boiler feed water, etc. to remove dissolved solid, ion substances, and microorganisms in the water to ensure that the water quality meets the production requirements. In the field of seawater desalination, it was one of the main technologies. By driving seawater through a reverse infiltration membrane, the salt and impurities in seawater could be removed to obtain fresh water for irrigation, industrial water, or drinking water replenishment. In the fields of medicine and biotechnology, it is used to prepare purified water and Deionized water to meet the needs of drug production and laboratory research. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

From the reference materials, only the prices of Dupont US Dow-type Reverse Osmosis Membrane BW30 - 400IG reverse permeate membranes in Jiading District of Shanghai City were obtained, which were 3450.00 for 1 - 9 units and 3350.00 for 10 units and above. In the past three months, the wholesale price of water purifier filter element pure water machine Suer 75G reverse permeate membrane 10-inch Korean one-piece quick-connect Reverse Osmosis membrane filter element in Jiading District of Shanghai City was 46.55. No other information about the price of reverse permeate membranes in Jiading District of Shanghai City was obtained. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The non-oxidiser disinfectant can be used to protect the reverse permeate membrane in the membrane system. This type of disinfectant had many properties: 1. ** Bactericidal property ** - It has a special effect of high efficiency, broad spectrum, and fast speed. It can penetrate the cells of microorganisms, decompose and destroy the cells of microorganisms. It has a strong killing and inhibition effect on microorganisms such as bacteria, fungi, and algae. It also has a certain stripping effect on the mucus formed by bacteria. - For example, Fion's FN - 802 Non-Oxidative Reverse Osmosis Membrane Bactericide could quickly kill bacteria with a low dosage and had a broad-spectrum sterilization effect. 2. ** Harmonization and environmental friendliness ** - It is compatible with all membranes, suitable for a wide range of pH. It has good biodegrade properties, no pollution to the environment, and can be quickly degraded into relatively non-toxic products. For example, some non-oxidiser biochemicals are suitable for a variety of reverse permeate membranes, TFC membranes, and nanofilter membrane components such as Tao and Hyde. 3. ** The flexibility of usage ** - Can be added continuously, intermittently or used together with cleaning agents. It can be pulsed at any point in the membrane system and can also be used for chemical cleaning. - For example, continuous dosage, during the operation of the reverse infiltration system, the dosage is continuously added through the measuring pump. Generally, the dosage concentration is 1 - 6pm, and it is diluted 10 times with the de-salted water. Intermittent dosage, once every 1 - 2 days, each dosage is 30 - 60 minutes, and the dosage concentration is 300 - 400pm. Some products should be tested and analyzed when they are used, and the dosage should be determined according to the water quality test results, the type of membrane, and the working conditions of the equipment. The dosage point is recommended to pre-treat the back end of the raw water pump in the front section. The dosage method is to continuously add 3 - 10pm by the measuring pump. The dosage and dosage frequency are determined by factors such as the degree of microorganisms pollution and control requirements. It can also be diluted with the produced water of the Reverse Ion Refinement System or the de-salted water, and the diluted multiple should not exceed 10. The use of these non-oxidisers helps to protect the reverse infiltration membrane and prevent the membrane from being contaminated by microorganisms, thereby prolonging the life of the reverse infiltration membrane, improving the water yield and water quality of the membrane, prolonging the cleaning cycle of the membrane, and reducing the production cost of the enterprise. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Kunming's Reverse Osmosis Scale Inhibition Agents (such as MDC220) had good effects in many aspects. It could effectively control the scaling of calcium dioxide, calcium sulphoate, calcium sulphoate, and strontium-sulphoate. Even when the Langelier Saturation Index (SI) was as high as +3.0, it would not scale. The scale inhibition agent can be used for all the main reverse infiltration membranes. It can maintain the surface of the reverse infiltration membrane clean by dispersing the blocking particles, ensuring the stable operation of the reverse infiltration system under the designed water production, prolonging the system cleaning cycle, improving the service life of the membrane, and thus reducing operating costs. It is effective in the range of 5 - 9 for the incoming water, and has good tolerance to aluminum and iron compounds. It can be used together with Solisep? MPT150. When used in drinking water, the effect can be guaranteed if it is used according to the specified dosage (10g/L, diluted concentration 10%, diluted with the permeate of the membrane or Deionized water). The typical dosage was 2 - 6 milligrams per liter. However, if the dosage was too high or too low, it might cause membrane contamination. It was necessary to determine the appropriate dosage and dosage. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Ultrafilter water purifiers and Reverse Osmosis water purifiers had their own advantages and disadvantages, and they could be considered according to their own needs when choosing. Ultrafilter water purifiers were relatively cheap. The whole machine cost about 500 to 1,000 yuan. Its advantages were low cost, fast water output, and no need for electricity to operate. It could effectively remove harmful substances such as bacteria, colloid, and viruses contained in tap water. It could also filter out rust, silt, suspended matter, and a large number of particles in the water. However, the ultra-filter water purifier could not completely filter heavy metal ions. The filtered water was not pure water and could not be drunk directly. If one wanted to drink it directly, one needed to ensure that it was an ultra-filter water purifier and the water source was municipal tap water. The Reverse Osmosis water purifier was currently the most advanced water purification solution among household water purifiers. The purified water was basically pure water and could be directly consumed. It was suitable for household drinking water filtering. It could remove impurities, rust, silt, colloid, bacteria, viruses, radioactive particles harmful to the human body, organic matter, fluorescent substances, pesticides, water alkalium, and heavy metals. It ensured that the drinking water was healthy and would not have scale even if it was boiled. However, its disadvantages were that it required electricity, produced waste water, produced water slowly, and the replacement of filter elements and the treatment of concentrated water might trouble consumers. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>