Aguas residuales 13 Calidad del agua 13 Conservacin̤ del agua 13 Sewage 13 Tratamiento del agua Wastewater Water conservation more ... Water quality Water treatment 13 Aguas usadas 12 Aguas negras 11 Purificacin̤ de aguas residuales 4 Waste water treatment 4 Desinfeccin̤ del agua 3 Water disinfection 3 Biodegradacin̤ de aguas residuales 2 Biodegradation of sewage 2 Environmental impact 2 Impacto ambiental 2 Industria textil 2 Photo-oxidation 2 Purificacin̤ del agua - Oxidacin̤ 2 Textile industry 2 Water purification - Oxidation 2 <U+00cd>ndices de eficiencia tčnica 1 Absorcin̤ atm̤ica 1 Activated carbon 1 Adsorcin̤ 1 Adsorption 1 Advance oxidation processes 1 less ...