TiO2 photocatalytic inactivation under simulated solar light of bacterial consortia in domestic wastewaters previously treated by UASB, duckweed and facultative ponds

Quimica nova

Pulgarin, Cesar¹  Rengifo-Herrera, Julián Andrés¹  Sanabria, Janeth²  Machuca, Fiderman² 

[1] Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland;Universidad del Valle, Cali, Colombia

关键词: photocatalysis;    TiO2;    domestic wastewaters disinfection.;   

DOI  :  10.1590/S0100-40422010000800003

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this work, TiO2photocatalysis was used to disinfect domestic wastewaters previously treatedby different biological treatment systems: Upward-flow Anaerobic Sludge Blanket(UASB), facultative pond, and duckweed pond. The microorganisms monitored wereE. coli, total coliforms, Shigella species, and Salmonellaspecies. Photocatalytic experiments were carried out using two light sources:a solar simulator (UV intensity: 68-70 W m-2) and black-light lamps(BLL UV intensity: 17-20 W m-2). Samples were taken after each treatmentstage. Results indicate that bacterial photocatalytic inactivation is affectedby characteristics of the effluent, including turbidity, concentration of organicmatter, and bacterial concentration, which depend of the type of biologicalpretreatment previously used.

【 授权许可】

CC BY