【摘要】 采用硫自养反硝化法处理模拟低浓度硝酸盐废水,以颗粒活性炭和陶粒作为微生物的载体,分别形成生物活性炭系统(2#系统)和生物陶粒系统(3#系统),并与不加载体的絮状污泥系统(1#系统)对比。结果表明在进水NO-3-N浓度为13 mg/L的条件下,1#启动成功需40 d左右、2#需10 d左右、3#需30 d左右;1#系统的NO-3-N和TN去除率分别为82%和53%,脱氮效果不稳定,水力停留时间(HRT)为5~6 h;2#系统的最低HRT达到1 h,NO-3-N去除率接近100%,TN去除率达到83%,且无NO-2-N的积累;3#系统的去除效果与2#相近,NO-3-N去除率达到96%,TN去除率达到82%,也无NO-2-N的积累,并且HRT可以降至0.5 h。由此表明在硫自养反硝化过程中选用合适的载体可以缩短启动时间、大幅提高处理效率、降低运行费用。更多还原

【Abstract】 Sulphur-based autotrophic denitrification was applied to treat the low concentration nitrate-contaminated water in this paper.Granular activated carbon and biological ceramsite were used as the carriers,forming the biological activated carbon(2#) system and biological ceramsite(3#) system,respectively.The two systems were compared with anaerobic sludge(1#) system without carrier.When the low concentration nitrate-contaminated water was 13 mg / L,it took 40 days for system 1# to achieve successful start-up,10 days for system 2#,and 30 days for system 3#.In anaerobic sludge(1#) system only 82 % nitrate and 53 % TN were removed with unstable denitrification effect,and hydraulic retention time(HRT) remained as long as 5~6 h;while a high NO-3-N and TN removal rate of about 100 % and 83 % were achieved in biological activated carbon(2#) system without accumulation of NO-2-N,and the shortest HRT reached 1 h;in biological ceramsite(3#) system 96 % nitrate and 82 % TN were removed without any accumulation of NO-2-N,and the shortest HRT was 0.5 h.Therefore,choosing suitable carrier was necessary and beneficial for the autotrophic denitrification process to achieve higher treatment efficiency and lower running cost.更多还原