Zhan Xinmin, Healy Mark G, Li Jianping
Department of Civil Engineering and Environmental Change Institute, National University of Ireland, Galway, Ireland.
Bioprocess Biosyst Eng. 2009 Aug;32(5):607-14. doi: 10.1007/s00449-008-0283-8. Epub 2008 Dec 14.
The aim of this study was to examine nitrogen removal from slaughterhouse wastewater in a laboratory-scale sequencing batch reactor (SBR) operated at low dissolved oxygen (DO) levels under two aeration strategies: intermittent aeration (IA) and continuous aeration (CA). Under the IA strategy, during the aeration periods, the maximum DO was controlled at 10% saturation; under the CA strategy, in the first hour of the react phase, the DO was maintained at 10% saturation, and then it was kept at 2-3% saturation in the remaining react phase. Total nitrogen removals of up to 95 and 91% were achieved under the IA and CA aeration strategies, respectively. It is proposed that in situ measurement of oxygen utilization rates can be used to control the operation of SBRs for nitrogen removal.
本研究的目的是在实验室规模的序批式反应器（SBR）中，于低溶解氧（DO）水平下，通过两种曝气策略：间歇曝气（IA）和连续曝气（CA），考察屠宰场废水的脱氮效果。在IA策略下，曝气期间，最大溶解氧控制在饱和度的10%；在CA策略下，反应阶段的第一个小时，溶解氧维持在饱和度的10%，然后在剩余的反应阶段保持在2 - 3%的饱和度。IA和CA曝气策略下的总氮去除率分别高达95%和91%。建议采用原位测量氧利用率来控制SBR的脱氮运行。
