Biological cleaning of liquid effluent containing detergents consists of aerobic treatment of water containing nonyl phenol and phosphorus and nitrogen salts

The biological cleaning of liquid effluent containing detergents comprises aerobic cleaning of water containing n = 10 degree of ethoxylated nonyl phenol, anionic detergents and eg. petroleum products and heavy metals with addition of phosphorus and nitrogen salts (100:5:1 CBO3:N:P ratio).The cleaner has a submerged bio filter with a volcanic tuff support. EMBODIMENT ­ Re-circulation and addition of a selected bacterial strain inoculant complete the process.