Project Introduction
Electronic semiconductor wastewater treatment Project Introduction:
Semiconductor is a material with conductive properties between conductors and insulators at normal temperature, which is often used to produce electronic components. Its production wastewater mainly comes from the corrosion section in the semiconductor production process. For example, the copper wire on the circuit board is etched after the copper foil paper on the circuit board is coated with copper foil. Due to the use of a large number of hydrofluoric acid, ammonium fluoride and other reagents, the pollutant concentration is high. Such as fluorine, ammonia, etc., wastewater is generally strongly acidic.
Its organic wastewater pollutants are mainly conventional pollutants, COD is generally 200-3000mg/L. There are many kinds of metal ions in semiconductor production wastewater, mainly copper, nickel, chromium, tin, lead, silver, etc., and the general concentration is about dozens to hundreds of mg/L.
Requirements on wastewater treatment:
The electronics industry has much higher precision requirements, and in the washing water, the purity of the water is relatively high, so the water needs to be purified.
Problems existed in current treatment:
The wastewater produced by the electronic semiconductor industry is often treated by reduction precipitation, oxidation and cyanidation, chemical precipitation, neutralization, chemical gas float and other processes.
However, the effluent treated by these methods is difficult to reach the standard, and it is easy to cause secondary pollution to the sludge.
Advantages of Direct Cleaning Filtering System:
To use plant fiber as a filter material, not only to use its good filtration performance, but also to use its adsorption properties brought from its rich functional groups in the surface. Metal ions in electronic semiconductor wastewater is to intercepted and blocked by plant fiber. Compared with the existing physical treatment method, the filter material regeneration efficiency is high and the water quality after treatment is better and the whole process is more environmentally friendly.
After treatment, the filtrate can be directly into the membrane, which can effectively reduce the membrane pollution and extend the service life of the membrane.
