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Hydrochloric acid and sulfuric acid can be added to the influent water to reduce the pH. Sulfuric acid is more commonly used than hydrochloric acid because it is cheap, does not emit smoke and corrodes surrounding metal components, and the membrane has a higher removal rate of sulfate ions than chlo...

1. What is COD (chemical oxygen demand)? Chemical oxygen demand (COD) refers to the amount of oxygen required by the oxidizable substances in the wastewater when they are oxidized by chemical oxidants, in mg/L of oxygen. It is the most commonly used method to determine the content of organic matter...

Membrane separation technology is a high and new technology that has risen rapidly in the past 40 years. It has developed into an industrialized high-efficiency energy-saving separation process and an advanced unit operation process. At present, technologies such as microfiltration, ultrafiltratio...

Troubleshooting of RO RO RO purified water equipment The switch is on, but the device does not start. ① Electrical circuit fault, such as broken fuse, wire falling off ② The thermal protection element is not reset after protection ③ Waterway undervoltage, check insurance, check wiring ② Thermal...

The battle for environmental protection is still raging. I hope that this year's haze control will be effective. Water is not only the source of life, but also extremely important to human beings, and the pollution is so severe. Long-term drinking of poor water quality can lead to poor physical...

1 What are the pretreatment equipment you know? A: Pretreatment equipment includes: mechanical filter, high-efficiency fiber filter, activated carbon filter, precision filter, ultrafiltration, microfiltration, sodium ion softener, iron and manganese removal filter, dosing device, raw water tank, ae...

The pore size of RO reverse osmosis membrane is as small as nanometer (1 nanometer=10 * - 9 meters). Under certain pressure, water molecules can pass through the RO membrane, while inorganic salts, heavy metal ions, organics, colloids, bacteria, viruses and other impurities in the source water canno...