| 序批式膜生物反应器同时脱氮除磷的比较研究 |
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| 中文关键词 序批式膜生物反应器(SBMBR) 脱氮除磷 反硝化除磷 膜污染 污水处理 |
| 英文关键词 sequencing batch membrane bioreactor (SBMBR) nitrogen and phosphorus removal denitrifying phosphorus removal membrane fouling wastewater treatment |
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| 中文摘要 |
| 对比了厌氧-好氧(AO)及厌氧-缺氧-好氧(A2O)2种运行模式序批式膜生物反应器(SBMBR)对模拟生活污水同时脱氮除磷的性能。结果表明,2种运行模式的SBMBR对有机物及氨氮的去除率分别可保持在90%及95%以上。A2O MBR具有更强的释磷能力，其SPRR30(前30min比释磷速率)比AO MBR高出47.5%；但SPUR30(前30min比吸磷速率)却比AO MBR低，这是导致前者膜出水中TP值较后者高的原因之一。2个系统内污泥均有反硝化除磷能力，A2O MBR中DPAO(反硝化聚磷菌)的比例比AO MBR提高了57%；硝酸盐为电子受体时单位电子转移所吸收的磷，前者比后者高30%。这两个因素双重作用的结果导致了A2O MBR反硝化除磷能力的提高。A2O MBR系统曝气时间减半并没有加重膜污染，反而该系统的膜污染相对较轻。膜对有机物有较好的过滤截留作用，污泥沉降性能对SBMBR出水水质影响很小。 |
| 英文摘要 |
| 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. |
