预臭氧在臭氧生物活性炭深度处理工艺中的优化和协同作用

预臭氧通常位于净水处理工艺的最前端,其对后续工艺的协同和优化作用值得探讨。通过中试,研究预臭氧在臭氧生物活性炭深度工艺处理太湖水中的作用。试验表明,预臭氧具有助凝效果,但对混凝去除有机物的帮助有限。研究发现,预臭氧可有效提升砂滤去除可生物降解有机物(BDOC)的效果,并与臭氧投加量有密切关系。预臭氧投加量为1.5 mg/L时,常规处理(混凝沉淀-砂滤)去除有机物的效果最好。预臭氧还可促进生物活性炭去除BDOC。在本试验中,最佳的预臭氧投加量对整个深度工艺去除有机物为1.5 mg/L,砂滤起到关键的作用。

Effects of pre-ozonation of optimization and synergy on O_3-BAC advanced treatment process

Pre-ozonation is usually located at the front of water purification treatment process, which is worth exploring for subsequent synergy and optimization processes. The effect of pre-ozonation on ozone biological activated carbon(BAC) of advanced process for treatment of Taihu Lake was investigated through pilot experiment. The experimental results show that pre-ozonation could help to remove turbidity but had limited contribution on removing organics. It was found that pre-ozonation could increase removal of biological dissolved organic compound(BDOC) in sand filtration, which was closely related to ozone dosage. When ozone dosage was 1.5 mg/L, conventional process(coagulation-sedimentation-sand filtration) removed organics best. It was also found that pre-ozonation could promote removal of BDOC in BAC. The optimate pre-ozonation dosage for advanced treatment to removal of organics was 1.5 mg/L and sand filtration played a key role.