Nitrogen and residual organic matter removal from anaerobic reactor effluent in a fixed-bed reactor with biogas for denitrification
Nitrogen and residual organic matter removal from anaerobic reactor effluent in a fixed-bed reactor with biogas for denitrification
复制标题
在固定床反应器中用沼气反硝化去除厌氧反应器出水中的氮和残留有机物
DOI：
10.1002/jctb.4537
复制
发表时间：
2015
影响因子：
3.4
通讯作者：
E. Foresti
中科院分区：
文献类型：
--
作者：
Jorge Luis Rodrigues Pantoja Filho;M. Damianovic;D. Fonseca;E. Foresti
背景
采用固定床好氧/缺氧反应器（AAFBR）对升流式厌氧污泥床（UASB）反应器处理生活污水的出水进行后处理。这是一种新的反应器配置，包括上部好氧硝化室，其进料来自UASB反应器的流出物。硝化的流出物向下流到缺氧室，该缺氧室从底部进料合成生物气（CH 4、CO2和H2S）用于脱氮。
结果
水力停留时间为7.5和5.0 h时，AAFBR对有机物的去除率均在90%以上。在合成沼气中H2S过量的条件下，平均脱氮率高于70%。在HDT为5.0小时，合成沼气的组成相似的UASB反应器处理生活污水，平均氮去除率约为50%。在这些条件下，反应器实现了硫化氢和甲烷的去除效率分别为100%和60%。
结论
反硝化活性的测定结果表明，在缺氧室中，自养反硝化和异养反硝化共存。AAFBR作为气体净化系统表现出额外的能力。结果表明，AAFBR作为生活污水三级处理的替代方案的潜力。© 2014化学工业协会
BACKGROUND
This paper describes an evaluation of a fixed-bed aerobic/anoxic reactor (AAFBR) for the post-treatment of effluent from an up-flow anaerobic sludge blanket (UASB) reactor treating domestic sewage. This is a new reactor configuration comprising an upper aerobic nitrification chamber fed with effluent from the UASB reactor. The nitrified effluent flows downwards to an anoxic chamber that is fed synthetic biogas (CH4, CO2 and H2S) from the bottom for denitrification.
RESULTS
The AAFBR removed organic matter at efficiencies higher than 90% for hydraulic detention times (HDT) of 7.5 and 5.0 h. The average nitrogen removal efficiencies were higher than 70% under conditions of excess H2S in the synthetic biogas. At an HDT of 5.0 h and with synthetic biogas of a similar composition to that in UASB reactors treating domestic sewage, the average N removal was approximately 50%. Under these conditions, the reactor achieved hydrogen sulfide and methane removal efficiencies of 100% and 60%, respectively.
CONCLUSIONS
The results obtained for the denitrifying activity indicated the coexistence of both autotrophic and heterotrophic denitrification in the anoxic chamber. The AAFBR exhibited additional ability as a gas cleanup system. The results demonstrate the potential of AAFBR as an alternative for the tertiary treatment of domestic wastewater. © 2014 Society of Chemical Industry