Biological Process Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering, University of São Paulo (EESC/USP), Av. João Dagnone, 1100-Santa Angelina, 13.563-120, São Carlos, SP, Brazil.
J Environ Manage. 2018 Jun 1;215:358-365. doi: 10.1016/j.jenvman.2018.03.074.
A novel horizontal mixed anoxic-aerobic fixed-bed reactor configuration based on nitrification coupled with autotrophic denitrification using hydrogen sulfide as an electron donor was developed. The nitrification removal efficiency (RE) reached values greater than 99% but was slightly affected by the accumulation of dissolved sulfur species in the liquid phase. The denitrification RE reached 99% with a HS inlet load of 28.6 g S m h, although the use of aluminum polychloride (PAC) as a sulfur coagulant in the anoxic zone affected the buffering capacity of the system and resulted in a decrease in the RE. The performance of the reactor was primarily affected by the buffering capacity of the system, and this effect could be controlled with an increase in the NaHCO concentration. The recovery of biogenic elemental sulfur was possible using PAC as a coagulant, although the solid collected at the bottom of the settling tank contained only 1.5% S.
开发了一种基于硫化氢作为电子供体的硝化耦合自养反硝化的新型水平混合缺氧-好氧固定床反应器构型。硝化去除效率（RE）达到了大于 99%的值，但受液相中溶解硫物种积累的影响较小。在 HS 入口负荷为 28.6 g S m h 的情况下，反硝化 RE 达到了 99%，尽管在缺氧区使用聚合氯化铝（PAC）作为硫凝结剂会影响系统的缓冲能力，从而导致 RE 下降。反应器的性能主要受系统缓冲能力的影响，可以通过增加 NaHCO 浓度来控制这种影响。使用 PAC 作为凝结剂可以回收生物成因元素硫，但在沉降罐底部收集的固体仅含有 1.5%的 S。
