%0 Journal Article %T 乳酸作为EBPR进水碳源的可行性研究 %A 龙建兵 %A 顾向阳 %J 南京农业大学学报 %D 2015 %R 10.7685/j.issn.1000-2030.2015.01.013 %X [目的]探索乳酸作为强化生物除磷(EBPR)进水碳源的可行性.[方法]首先采用厌氧-好氧型序批式生物反应器,以乳酸为唯一进水碳源驯化EBPR污泥(SBR-2),并与以乙酸为唯一进水碳源的EBPR污泥(SBR-1)对比;待SBR-2达到稳态运行后,在1个运行周期定期取样,测定混合液中化学需氧量(COD)、磷酸根、氨氮和硝氮等参数的周期变化,并与SBR-1比较;通过研究不同进水磷浓度对2个反应器除磷效率的影响,比较2种EBPR污泥的除磷能力.[结果]以乙酸为进水碳源的SBR-1和以乳酸为进水碳源的SBR-2分别经过8和31 d的驯化期实现了稳定的EBPR功能;与乙酸驯化的EBPR污泥类似,乳酸驯化所得的EBPR污泥也表现出典型聚磷菌(PAO)的代谢特征.以乳酸为碳源驯化而成的EBPR污泥其主要特征参数如有机酸吸收速率、磷释放速率和磷吸收速率均明显低于以乙酸为碳源驯化而成的EBPR污泥,但是由于其厌氧释放的磷浓度较低,结果仍可在相同的时间内完成磷的吸收.在进水磷酸根质量浓度小于等于12 mg？L-1时,以乳酸为进水碳源的反应器可以实现稳定高效的除磷效果,出水磷酸根质量浓度稳定在0.3 mg？L-1以下.[结论]采用乳酸作为EBPR的进水碳源是可行的.</br>[Objectives]Objective of the present study was to explore the feasibility of enhanced biological phosphorus removal(EBPR)by using lactic acid as the sole carbon source. [Methods]Acclimation of EBPR sludge was carried out in an anaerobic-aerobic sequencing batch reactor(SBR)by using lactic acid as influent carbon source(SBR-2)and compared with the control SBR, which received acetic acid as influent carbon source(SBR-1). Once steady state operation was achieved in SBR-2, a cyclic study for both reactors were initiated through periodic sampling and analysis of such parameters as chemical oxygen demand(COD), phosphate, ammonia and nitrate in the mixed liquor. EBPR sludge’s ability in phosphorus removal was compared between two SBRs through investigating the effects of influent P concentration on phosphate removal efficiency. [Results]In the present study, enhanced biological phosphorus removal was successfully established in both lactic acid-feed SBR-2 and acetic acid-feed SBR-1 after an acclimation period of 8 d and 31 d, respectively. Similar to acetic acid-feed EBPR sludge, lactic acid-feed EBPR sludge exhibited characteristic metabolic behavior typical to polyphosphate-accumulating organisms(PAOs). As compared to acetic acid-feed EBPR sludge, lactic acid-feed EBPR sludge was characterized by significantly lower values of such parameters as organic acid uptake rate, P-release rate and P-uptake rate. However this did not lead to any difference in the time period required for complete aerobic P-uptake between these two sludges and this could be attributed to significantly lower P-release observed in the lactic acid-feed SBR-2. When influent phosphate concentration was not more than 12 mg？L-1, nearly complete phosphorus removal could be achieved for the lactic acid-feed SBR-2 as indicated by low levels of effluent phosphate concentration below 0.3 mg？L-1. [Conclusion]EBPR could be achieved by using lactic acid as the sole carbon source %K 聚磷菌 %K 强化生物除磷 %K 乳酸 %K 碳源< %K /br> %K polyphosphate-accumulating organism(PAO) %K enhanced biological phosphorus removal(EBPR) %K lactic acid %K carbon source %U http://nauxb.njau.edu.cn/oa/darticle.aspx?type=view&id=201501013