【摘要】 采用将硫自养反硝化与生物活性炭相结合的方式处理硝酸盐废水。以颗粒活性炭作为硫自养反硝化菌的载体,形成用于处理硝酸盐废水的生物活性炭系统,与不加炭粒的厌氧污泥系统相比,提高了对NO3--N的去除率。在进水NO3--N负荷为0.04～0.08 kg/(m3.d)的条件下,普通厌氧污泥系统对NO3--N的去除率仅为80%左右,而生物活性炭系统的去除率则在90%以上,且该系统在0.96 kg/(m3.d)的负荷下仍能维持90%以上的NO3--N去除率,而没有发生NO 2--N的积累。运行177 d后对反应器中的污泥以及颗粒活性炭表面进行了扫描电镜(SEM)观察,发现其中的细菌以杆菌为主,并且活性炭上的菌密度远高于絮状厌氧污泥中的菌密度。更多还原

【Abstract】 A combined system of sulphur-based autotrophic denitrification and biological activated carbon(BAC) was used to treat nitrate wastewater.Granular activated carbon(GAC) was used as a carrier of sulphur-based autotrophic denitrification bacteria,forming the combined system.Compared with the system without GAC,the combined system has an obvious higher NO-3-N removal efficiency.At the nitrogen loading rate(NLR) of 0.04 to 0.08 kg/(m3·d),the system without GAC removes only 80% of the nitrate,while more than 90% of the nitrate is removed in the combined system and the removal rate remains stable even at the NLR of 0.96 kg/(m3·d) without the accumulation of NO-2-N.After 177 days of running,SEM observation verifies that the rod-shaped bacteria predominate in the reactor,and that much denser bacterial population is on the surface of GAC than in the flocculent sludge.更多还原