Some articles on trickling filters, trickling filter:
... Wastewaters from a variety of industrial processes have been treated in trickling filters ... Such industrial wastewater trickling filters consist of two types Large tanks or concrete enclosures filled with plastic packing or other media ... plastic tower packings has led to their use as trickling filter beds in tall towers, some as high as 20 meters ...
Famous quotes containing the word filters:
“Raise a million filters and the rain will not be clean, until the longing for it be refined in deep confession. And still we hear, If only this nation had a soul, or, Let us change the way we trade, or, Let us be proud of our region.”
—Leonard Cohen (b. 1934)