Infrared filter (passing) filters are commonly used in infrared photography to pass infrared light and block visible and ultraviolet light.  Dark black sections of processed film works to pass infrared light and is commonly used as a cheap alternative to expensive glass filters. Let's us see infrared filter of the features.

  1. Pollutant carrying capacity: usually 15 ~ 35kg/m3, ordinary sand filter is more than 4 times.
  2. Backwash water is low: less than the amount of backwash water treatment cycle, the amount of 1 to 2%.
  3. Low dosage, low operating costs: As the media filter bed structure and the characteristics of its own, flocculant dosage of the conventional technology 1 / 2 to 1 / 3. Increase water production cycle, tons of water also reduces operating costs.