序批式膜生物反应器中同步除磷脱氮的比较

[Comparisons of simultaneous phosphorus and nitrogen removal in sequencing batch membrane bioreactors].

作者信息

Xiao Jing-Ni, Zhang Han-Min, Dai Wen-Chen, Yang Feng-Lin, Zhang Xing-Wen

机构信息

School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.

出版信息

Huan Jing Ke Xue. 2006 Nov;27(11):2233-8.

PMID:17326432

Abstract

Two SBMBRs run in AO and A2O mode were operated in parallel to compare their ability of simultaneous phosphorus and nitrogen removal. The results showed that the removals of COD and ammonium nitrogen were averaged over 90% and 95%, respectively. A2O MBR has the stronger anaerobic phosphorus release ability; its SPRR30 outdoes 47.5% compared to AO MBR. SPUR30 of A2O MBR was lower which may attribute to the higher effluent TP content. The ratio of DPAO was enhanced 57% compared to AO MBR. And when nitrate as the only electron accepter, the phosphorus uptake mass with unit electron transfer was 30% higher in A2O MBR. This two factors lead to the stronger denitrifying phosphorus removal ability of A2O MBR. Furthermore, the membrane fouling was mitigated in A2O MBR though the aerobic time was half to that of AO MBR. The membrane filter function made SBMBR's effluent free of the sludge settlement ability.

摘要

两个分别以AO模式和A2O模式运行的序批式膜生物反应器（SBMBR）并联运行，以比较它们同时去除磷和氮的能力。结果表明，化学需氧量（COD）和氨氮的去除率分别平均超过90%和95%。A2O膜生物反应器具有更强的厌氧释磷能力；与AO膜生物反应器相比，其30分钟的特定磷释放率（SPRR30）高出47.5%。A2O膜生物反应器的特定磷摄取率（SPUR30）较低，这可能归因于出水总磷（TP）含量较高。与AO膜生物反应器相比，A2O膜生物反应器中反硝化聚磷菌（DPAO）的比例提高了57%。并且当以硝酸盐作为唯一电子受体时，A2O膜生物反应器中单位电子转移的磷摄取量高出30%。这两个因素导致A2O膜生物反应器具有更强的反硝化除磷能力。此外，尽管A2O膜生物反应器的好氧时间仅为AO膜生物反应器的一半，但其膜污染得到了缓解。膜过滤功能使SBMBR的出水没有污泥沉降能力。