光催化降解养虾废水中有机物及灭菌研究

 为了研究TiO₂光催化降解养虾废水中有机物及杀菌能力,文章以TiO₂二氧化钛为催化剂,并分别加入H₂ O₂和Fenton试剂作为助剂进行了光催化降解实验。结果表明：在300 W中压汞灯和太阳光下,Fenton试剂作为助剂的效果最好, COD-Cr去除率分别达到71.6%和13.0%,而空白实验对应的COD-Cr去除率几乎为0。养虾废水中细菌总数为2.6×10¹¹个/L,以TiO₂为光催化剂,经300 W中压汞灯照射30 min或太阳光照射3 h后,杀菌率为100%。

Photocatalytic Degradation of Organics and Germicidal Treatment of Shrimp Breeding Wastewater

In order to study the TiO₂ photocatalytic degradation of organics and antibacterial capacity in shrimp breeding wastewater treatment, experiments were carried out with TiO₂ powder and H₂ O₂ or Fenton agent added together with TiO₂ as catalyst. Results indicated that the optimal effect can be gotten with Fenton agent as assistant. COD-Cr removal rates were 71.6% with 300 W medium pressure mercury lamp and 13.0% with sunlight, while organics was almost not degraded in blank experiments. Total number of bacteria was 2.6×10¹¹ L^-1 in shrimp breeding wastewater. However, bacteria removing rate were 100% with 300 W medium pressure mercury lamp illuminating for 30 min or sunlight for 3 h with TiO₂ as photocatalyst.