State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2011 Apr;102(8):5244-7. doi: 10.1016/j.biortech.2011.01.049. Epub 2011 Feb 1.
Rapid formation of denitrifying sulfide removal granules is of practical interest to start up an expanded granular sludge bed reactor for wastewater treatment. This study demonstrates that methanogenic granules can be easily acclimated into DSR granules in one day, removing all 1.30 kg m(-3) d(-1) sulfide and converting >90% of 0.56 kg-Nm(-3)d(-1) nitrate into di-nitrogen gas. Under high loadings, reactor performance, however, declined. Under high loading rates, sulfide first inhibited the heterotrophic denitrifier (Caldithrix sp.), thereby accumulating nitrite in the system; the autotrophic denitrifier (Pseudomonas sp. C23) was then inhibited by accumulated nitrite, leading to breakdown of the entire DSR process.
快速形成反硝化除硫颗粒对于启动废水处理的膨胀颗粒污泥床反应器具有实际意义。本研究表明，产甲烷颗粒可以在一天内轻松适应 DSR 颗粒，去除所有 1.30 kg m(-3) d(-1)的硫化物，并将 >90%的 0.56 kg-Nm(-3) d(-1)硝酸盐转化为二氮气体。然而，在高负荷下，反应器性能下降。在高负荷率下，硫化物首先抑制了异养反硝化菌（Caldithrix sp.），从而使系统中积累亚硝酸盐；然后，积累的亚硝酸盐抑制自养反硝化菌（Pseudomonas sp. C23），导致整个 DSR 过程崩溃。
