UASB treatment of chemical synthesis-based pharmaceutical wastewater containing rich organic sulfur compounds and sulfate and associated microbial characteristics
UASB treatment of chemical synthesis-based pharmaceutical wastewater containing rich organic sulfur compounds and sulfate and associated microbial characteristics
复制标题
DOI：
10.1016/j.cej.2014.08.085
复制
发表时间：
2015-01-15
影响因子：
15.1
通讯作者：
Yang, Min
中科院分区：
文献类型：
--
作者：
Li, Weicheng;Niu, Qigui;Yang, Min
研究了上流式厌氧污泥床（UASB）处理含硫废水的可行性。投加硫酸盐后，废水中初始COD/SO_（4 ~（2-））为8的比值从5变化到1.5。在COD/SO 42-为8和5的条件下，尽管同时产生硫化物和硫化氢，但出水硫酸盐浓度高于进水。这是由于在该反应器中这些有机硫化合物降解期间以硫酸盐形式释放的硫。相反，在COD/SO 42-为1.5时，由于反应器中更多硫酸盐的还原，流入硫酸盐高于流出硫酸盐。在COD/SO_（42-）为8时，对于实际应用，最佳OLR为8 kg COD/m（3）/d，此时沼气中甲烷含量为63%时，COD降低近70%。在这一阶段，古菌和细菌群落的分布变化很大，改变OLR（伴随着延长的操作时间）。球形赖氨酸芽孢杆菌（Lysinibacillus sphaericus）、食纤维梭菌（Clostridium cellulovorans）等可能是反应器中某些有机硫化合物释放硫的部分原因。当COD/SO_（42-）= 1.5时，由于高浓度的硫化物（1212 SO_（42-）- S mg/L），硫酸盐负荷对甲烷生成的抑制作用较弱，而对硫化物生成的抑制作用不明显。(C)2014爱思唯尔有限公司版权所有。
The feasibility of treating of chemical synthesis-based pharmaceutical wastewater containing rich organic sulfur compounds and sulfate using an upflow anaerobic sludge blanket (UASB) was investigated. The initial COD/SO42- ratio of 8 in the wastewater varied from 5 to 1.5 after adding sulfate. Of interest that under the condition of COD/SO42- at 8 and 5, despite the simultaneous generation of sulfide and hydrogen sulfide, the sulfate concentration in the effluent was higher than in the influent. This is due to the sulfur release in the form of sulfate during the degradation of these organic sulfur compounds in this reactor. Conversely, at COD/SO42- of 1.5, influent sulfate was higher than effluent sulfate due to reduction of more sulfates in the reactor. At COD/SO42- of 8, for practical application, the optimum OLR was found to be 8 kg COD/m(3)/d, where a nearly 70% COD reduction occurred with biogas containing 63% methane. In this stage, the distribution of the archaea and bacterial community varied greatly with altered OLR (accompanied with prolonged operation time). Some species, such as Lysinibacillus sphaericus, Clostridium cellulovorans were expected to be partly responsible for S release from some organic sulfur compounds in the reactor. By increasing the sulfate loading at a COD/SO42- ratio up to 1.5 resulted in a light inhibition of methanogenesis due to the high sulfide concentration (1212 SO42- - S mg/L) with no obvious suppression of sulfidogenesis. (C) 2014 Elsevier B.V. All rights reserved.