摘要
采用外循环UASB／SBBR工艺处理高浓度禽畜养殖废水，经过103d的连续运行，系统性能达到稳定。在进水COD为7464～12241mg／L的条件下，出水COD稳定在204．3～386．4mg／L，平均去除率达到97．3％，UASB、SBBR的负荷分别为12．2和1．4kgCOD／（m^3·d）；在进水NH4^＋ -N为276．2～393．2mg／L的条件下，出水NH4^＋ -N稳定在2．1～15．6mg／L，平均去除率为97．4％，实现了对有机物及NH4^＋-N的有效去除。整个试验过程中，SBBR反应器在室温下运行，硝化阶段的溶解氧控制在0．8～1．4mg／L，稳定运行后出水NO2^- -N占N02-N的比例达74．9％，平均硝化率和反硝化率分别维持在97．4％和93．6％，对总氮的去除率为89．6％，实现了以短程硝化反硝化为主的生物脱氮。
The combined process of up-flow anaerobic sludge blanket （UASB） and sequencing biofitm batch reactor （SBBR） was used to treat high strength livestock wastewater. A stable UASB/SBBR process performance was achieved after continuous operation for 103 d. When the influent COD concentration ranged from 7 464 to 12 241 mg/L, the effluent COD concentration was between 204.3 and 386.4 mg/L, with an average removal rate of 97.3%. The maximum organic loading rates for UASB and SBBR were 12.2 and 1. g kgCOD/（ m^3· d）, respectively. When the influent ammonia nitrogen changed from 276, 2 to 393.2 mg/L, the effluent ammonia nitrogen varied from 2.1 to 15.6 mg/L, with an average removal rate of 97.4%. COD and ammonia nitrogen were effectively removed. The SBBR was operated at room temperature during the whole test, the dissolved oxygen was kept between 0.8 and 1.4 mg/L, the effluent NO2^- - N accounted for 74.9% of NOx^- - N, and the average nitrification rate, denitrification rate and TN removal rate were 97.4%, 93.6% and 89.6%, respectively. Biological nitrogen removal by shortcut nitrification and denitrification was achieved.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第9期21-26,共6页
China Water & Wastewater
基金
北京市科技计划项目(Z121100001512008)
环境模拟与污染控制国家重点联合实验室专项经费资助项目(13K06ESPCT)
