Experimental assessment and modelling of the proton production linked to phosphorus release and uptake in EBPR systems
Experimental assessment and modelling of the proton production linked to phosphorus release and uptake in EBPR systems
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DOI：
10.1016/j.watres.2009.03.003
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发表时间：
2009-05-01
期刊：
影响因子：
12.8
通讯作者：
Antonio Baeza, Juan
中科院分区：
文献类型：
--
作者：
Marcelino, Marcos;Guisasola, Albert;Antonio Baeza, Juan
强化生物除磷（EBPR）过程的建模是最近关注的焦点。pH值是EBPR建模的一个很有前途的输出变量，因为它对酸碱物质（如磷酸盐或VFA）的消耗或生产非常敏感。基于ph的EBPR模型基于磷被释放并以H2PO4-的形式被吸收的假设，但这一假设尚未在富集的EBPR生物量中得到实验证实。因此，本研究的目的是评估不同pH条件下磷的释放和吸收。用积累杆菌（约占总微生物的70 +/- 10%）的富集培养进行了几次批量实验。测量了总质子产量、无机碳、铵、磷酸盐和VFA，以评估厌氧p释放和好氧p吸收对总质子产量的滴定贡献。结果表明，在pH 6.5 ~ 8.5范围内，参与磷释放和磷吸收的唯一磷形态与H2PO4-的质子生成量相当。最后，对几个SBR循环的质子生成和pH进行了模拟，结果与实验结果吻合良好。2009爱思唯尔有限公司版权所有。
The modelling of the enhanced biological phosphorus removal (EBPR) process is a recent focus of interest. The pH profile is a promising output variable for EBPR modelling as it is very sensitive to the consumption or production of acid and base species (e.g. phosphate or VFA). pH-based EBPR modelling is based on the assumption that phosphorus is released and taken up as H2PO4-, but this assumption has not been experimentally confirmed yet with enriched EBPR biomass. Therefore, the objective of this work was to assess the species in which P is released and taken up under different pH conditions. Several batch experiments were performed with an enriched culture of Accumulibacter (around 70 +/- 10% of total microorganisms). The total observed proton production, inorganic carbon, ammonium, phosphate and VFA were measured to evaluate the titrimetric contribution of anaerobic P-release and aerobic P-uptake over the total observed proton production. The results show that the only phosphorus form involved in P-release and P-uptake is equivalent in terms of proton production to H2PO4- in the pH range of 6.5-8.5. Finally, proton production and pH in several SBR cycles were modelled and resulted in good agreement with the experimental profiles. (C) 2009 Elsevier Ltd. All rights reserved.