Effect of soluble microbial products on microbial metabolisms related to nutrient removal.
Effect of soluble microbial products on microbial metabolisms related to nutrient removal.
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DOI：
10.1016/j.watres.2006.01.047
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发表时间：
2006-05
期刊：
影响因子：
12.8
通讯作者：
O. Ichihashi;H. Satoh;T. Mino
中科院分区：
文献类型：
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作者：
O. Ichihashi;H. Satoh;T. Mino
研究了可溶性微生物产物(SMP)对活性污泥除磷脱氮代谢的影响。运行了两个厌氧-好氧活性污泥工艺，一个的水力停留时间(HRT)为48h(RunL)，另一个为6.4h(RunL)。延长RunL的HRT旨在促进培养上清液中SMPs的积累。利用两次运行的污泥和上清液，进行了上清液交换间歇试验(SEBES)，测定了厌氧条件下的醋酸盐吸收速率和磷释放速率以及好氧条件下的磷吸收速率，因为这些代谢与强化生物除磷有关。并对硝化速率进行了测定。对SEBES结果的统计分析表明，RunL的上清液对RunL污泥的厌氧醋酸盐吸收和硝化作用有抑制作用。其原因归因于RunL培养上清液中的SMPS。结果表明，SMPS对硝化作用和厌氧醋酸盐吸收有抑制作用。
In this study, the effect of soluble microbial products (SMP) on the metabolisms related to phosphate or nitrogen removal of activated sludge was investigated. Two anaerobic–aerobic activated sludge processes were operated, one with a hydraulic retention time (HRT) of 48h (RunL) and the other 6.4h (RunS). The longer HRT of RunL was intended to promote the accumulation of SMPs in the supernatant. With the sludge from RunS and the supernatant from both of the runs, supernatant exchange batch experiments (SEBEs) were conducted, in which the acetate uptake rate and phosphate release rates under anaerobic conditions and the phosphate uptake rate under aerobic conditions were measured as these metabolisms are related to enhanced biological phosphorus removal. The nitrification rate was also measured. The statistical analyses of the results from the SEBEs showed that the supernatant from RunL had an inhibitory effect on the anaerobic acetate uptake and nitrification of the sludge from RunS. The cause of which was attributed to SMPs in the supernatant from RunL. As a result, the inhibitory effect of SMPs on nitrification and anaerobic acetate uptake was confirmed.