https://patents.google.com/patent/US20090200151A1/en
US20090200151A1 - Apparatus for Purification of Water - Google Patents
Apparatus for purification or water having an evaporation chamber ( 3 ), a roof ( 5 ) and a condensation chamber ( 8 ) and wind air inlet means ( 14, 15 ). The...
purification of waterapparatusgooglepatents
https://pubchem.ncbi.nlm.nih.gov/patent/EP-0357753-B1
Process and device for biological purification of water contaminated with nitrogen and phosphor...
EP-0357753-B1 chemical patent summary.
purification of water