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A Novel Denitrifying Phosphorus Removal and Partial Nitrification, Anammox (DPR-PNA) Process for Advanced Nutrients Removal from High-strength Wastewater
Chemosphere ( IF 8.8 ) Pub Date : 2020-12-02 , DOI: 10.1016/j.chemosphere.2020.129165
Xingxing Zhang , Chaochao Wang , Peng Wu , Yunkang Xia , Ya Chen , Wenru Liu , Lezhong Xu , Fangnigbe Faustin

This study developed a novel DPR-PNA (denitrifying phosphorus removal, partial nitrification and anammox) process for sustaining high-strength wastewater treatment in a modified continuous flow reactor without external carbon source. After 259-days operation, a synchronous highly-efficient total inorganic nitrogen, PO43--P and CODcr removal efficiencies of 88.5%, 89.5% and 90.1% were obtained, respectively even influent nitrogen loading rate up to 3.2 kg·m−3·d−1. Batch tests revealed that denitrifying phosphorus accumulating organisms (DPAOs) using NO3--N as electron acceptors significantly enriched (74% in total PAOs), which emerged remarkable positive impacts on deep-level nutrient removal as the key limiting factor. Furthermore, the NO2--N inhibitory threshold value (∼20.0 mg·L-1) for DPAOs was identified, which demonstrated as an inhibitory component in excessive recycling NOx--N. From the molecular biology perspective, Dechloromonas-DPAOs group (18.59%) dominated the excellent dephosphatation performance, while Nitrosomonas-AOB (ammonia oxidizing bacteria) group (16.26%) and Candidatus_Brocadia-AnAOB (anammox bacteria) group (15.12%) were responsible for the desirable nitrogen loss process. Overall, the present work highlighted the novel DPR-PNA process for nutrients removal is a promising alternation for wastewater of high nitrogen but low carbon.



中文翻译:

一种新型的反硝化除磷和部分硝化厌氧氨氧化(DPR-PNA)工艺,用于从高强度废水中去除高级营养素

这项研究开发了一种新颖的DPR-PNA(脱氮除磷,部分硝化和厌氧氨氧化)工艺,用于在无外部碳源的改进型连续流反应器中维持高强度废水处理。运行259天后,即使进水氮负荷量高达3.2 kg·m ,同步高效的总无机氮,PO 4 3- -P和COD cr去除效率也分别达到88.5%,89.5%和90.1%。-3 ·d -1。批量测试表明,使用NO 3-可以消除磷累积生物(DPAO)的反硝化-作为电子受体的-N显着富集(占总PAO的74%),这对深层养分去除是重要的限制因素,产生了显着的积极影响。此外,确定了DPAOs的NO 2 -- N抑制阈值(〜20.0 mg·L -1),证明其是过量回收NO x -- N的抑制成分。从分子生物学的角度看,脱氯核苷酸-DPAOs组(18.59%)占了优异的脱磷性能,而亚硝化单胞菌-AOB(氨氧化细菌)组(16.26%)和假丝酵母(Candidatus_Brocadia)-AnAOB(厌氧细菌)组(15.12%)负责理想的氮损失过程。总的来说,本工作着重介绍了用于去除营养物的新颖DPR-PNA工艺,这对于高氮低碳废水是一种有希望的替代方法。

更新日期:2020-12-02
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