Enhanced biological nutrient removal in sequencing batch reactors operated as static/oxic/anoxic (SOA) process.
Enhanced biological nutrient removal in sequencing batch reactors operated as static/oxic/anoxic (SOA) process.
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DOI：
10.1016/j.biortech.2013.05.092
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发表时间：
2013-09
影响因子：
11.4
通讯作者：
Dechao Xu;Hong-bo Chen;Xiaoming Li;Qi Yang;Tian-jing Zeng;Kun Luo;G. Zeng
中科院分区：
文献类型：
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作者：
Dechao Xu;Hong-bo Chen;Xiaoming Li;Qi Yang;Tian-jing Zeng;Kun Luo;G. Zeng
开发了一种创新的静态/好氧/缺氧 (SOA) 活性污泥工艺，以静态阶段作为传统厌氧阶段的替代品，以增强生物营养物去除 (BNR)，R1 和 R2 反应器中的进水氨分别为 20 和 40 mg/L。结果表明，静态阶段可以起到常规厌氧阶段的作用。在R1中，较低的进水氨浓度促进了更多聚磷酸盐积累生物（PAO）的生长，但由于缺氧后NO x 消耗，发生了二次磷释放。然而，在R2中，反硝化除磷随着足够的NO x- 进行。 R1和R2同时发生硝化反硝化作用。利用糖原来驱动后反硝化，反硝化速率超过典型的内源腐烂速率。缺氧搅拌时间可从3 h缩短至1.5 h，以避免R1中的二次磷释放，且对R2中养分去除的不利影响较小。
An innovative static/oxic/anoxic (SOA) activated sludge process characterized by static phase as a substitute for conventional anaerobic stage was developed to enhance biological nutrient removal (BNR) with influent ammonia of 20 and 40 mg/L in R1 and R2 reactors, respectively. The results demonstrated that static phase could function as conventional anaerobic stage. In R1 lower influent ammonia concentration facilitated more polyphosphate accumulating organisms (PAOs) growth, but secondary phosphorus release occurred due to NO x-depletion during post-anoxic period. In R2, however, denitrifying phosphorus removal proceeded with sufficient NO x-. Both R1 and R2 saw simultaneous nitrification–denitrification. Glycogen was utilized to drive post-denitrification with denitrification rates in excess of typical endogenous decay rates. The anoxic stirring duration could be shortened from 3 to 1.5 h to avoid secondary phosphorus release in R1 and little adverse impact was found on nutrients removal in R2.