Li Wei, Zhao Qing-Liang, Liu Hao
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Huan Jing Ke Xue. 2008 Jul;29(7):1855-9.
By decreasing hydraulic retention times to increase substrates loading rates under anoxic conditions, an attached-growth bioreactor packed with porous sponges was started to treat the wastewater contaminated by sulfide, nitrate, nitrite and organic carbon. The influent concentrations of sulfide, nitrate-nitrogen, nitrite-nitrogen and TOC were 200 mg/L, 52.5 mg/L, 20 mg/L, 20 mg/L and relevant removal efficiencies were 99%, 99%, 95.5% and 80% respectively. The simultaneous removal of nitrogenous compounds, sulfide and organic carbon was achieved by the desulfurization and denitrification process. With increasing of the substrate loading rates, the adaptabilities of nitrate and nitrite to the influent shock load decreased. The adaptability of nitrate to the shock load was better than that of nitrite. Compared with the impact on the bioreactor brought by the increasing of the influent shock load, the destruction of anoxic environment had greater influence on the degradation of nitrate and nitrite. 60% of the removed sulfide was converted to sulfur by microorganisms. The dominant reaction of autotrophic denitrification occurred together with the heterotrophic denitrification whose percent was 21.76%.
通过在缺氧条件下缩短水力停留时间以提高底物负荷率，启动了一个填充有多孔海绵的附着生长生物反应器来处理受硫化物、硝酸盐、亚硝酸盐和有机碳污染的废水。硫化物、硝酸盐氮、亚硝酸盐氮和总有机碳的进水浓度分别为200mg/L、52.5mg/L、20mg/L、20mg/L，相应的去除效率分别为99%、99%、95.5%和80%。通过脱硫和反硝化过程实现了含氮化合物、硫化物和有机碳的同时去除。随着底物负荷率的增加，硝酸盐和亚硝酸盐对进水冲击负荷的适应性降低。硝酸盐对冲击负荷的适应性优于亚硝酸盐。与进水冲击负荷增加对生物反应器的影响相比，缺氧环境的破坏对硝酸盐和亚硝酸盐降解的影响更大。60%的去除硫化物被微生物转化为硫。自养反硝化的主要反应与异养反硝化同时发生，异养反硝化占比为21.76%。
