Detailed text transcripts for TV channel - DW - 20190107:08:54:00
The second uses activated carbon granules in early trials it was much more effective thats because the compounds left over after as a nation and here are readily to their uneven surface but this system has a drawback after two years that the latest the activated carbon particles are covered completely they cant absorb any more so the filters have to be swapped out and cleaned which is complicated and expensive. thats why the researchers have high hopes for a new activated carbon process that har...
Source: archive.org