紫外辐射下的生物降解及微生物群落的变化

分别采用一体式循环床紫外光/生物膜反应器（PCBBR）和气升式内循环的紫外光/生物膜反应器（ILPBR）,用于苯酚、2,4,6-三氯酚（TCP）和抗生素药物磺胺甲恶唑（SMX）的降解.结果表明,苯酚、TCP和SMX在紫外光解与生物降解的共同作用下,其去除速率分别达到0.65、0.11和0.17 mg.（L.min）–1...

Biodegradation Under UV Irradiation and Microbial Community Changes

Photolytic circulating-bed biofilm reactor (PCBBR) and internal loop photolytic-biological reactor (ILPBR) were respectively used for degradation of phenol, 2, 4, 6-trichlorophenol (TCP) and sulfamethoxazole (SMX). Experimental results indicated that the rates of phenol, TCP and SMX removal by coupled photolysis with biodegradation (P&B) reached at 0.65, 0.11 and 0.17 mg x (L x min)(-1), which was clearly higher than that by photolysis alone (P), biodegradation alone (B), except phenol removal rate by B,which was similar to the rates by P&B. The COD removal percentages of phenol and TCP were 99.5% and 72.1%, and TOC removal percentage of SMX was 57.3, which all were higher that by P and B. The biofilms under UV irradiation were taken as samples for molecular biological analysis to get the significant results that microbial communities in biofilms took great change compared with that without UV irradiation, but they still kept bioactivity degrading organic pollutants. That is significant results for technological innovation on recalcitrant organic wastewater treatment.