Response of an aerobic granular and conventional flocculated reactors against changing feed composition from simple composition to more complex.,Chemosphere

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Response of an aerobic granular and conventional flocculated reactors against changing feed composition from simple composition to more complex.
Chemosphere ( IF 8.1 ) Pub Date : 2020-04-06 , DOI: 10.1016/j.chemosphere.2020.126694
Sunayna Dasgupta ₁ , Aditi Podder ₁ , Ramesh Goel ₁

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This research evaluated the effect of changing feed composition on the performances of a conventional activated sludge (CAS) and an aerobic granular sludge (AGS) reactor operated simultaneously. Both reactors were initially fed with 100% synthetic feed. In a stepwise manner, the feed composition was slowly changed to real primary effluent collected from a local wastewater treatment plant. After an initial stabilization period, both reactors could achieve more than 90% NH4+-N removal. However, PO43--P removal eventually reached to a maximum of 92% in the AGS and 88% in the CAS. COD removal in both reactors was least affected, with the lowest percent removal of 81 ± 3% achieved in AGS and 62 ± 4% in CAS respectively when fed with 100% real wastewater. Despite granule breakage the AGS reactor was able to remove the pollutants (COD, N, P). The abundance of Candidatus Accumulibacter, a polyphosphate accumulating organism, in the AGS system increased over the operational phases: II (6.2%), III (10.32%), and IV (11.9%). While in CAS, it increased from phase I to phase II (12.6%), but decreased in phase III to 9.9%. Genus-based classification revealed a successive increase in the relative abundance of Nitrospira to 11.05% during Phase III and 10.3% during Phase IV in the AGS. In contrast with its presence in the CAS, which was, 3.4% during Phase III and 9.5% during Phase IV.

中文翻译：

好氧颗粒和常规絮凝反应器对进料组成从简单组成到更复杂的响应。

这项研究评估了改变进料组成对同时运行的常规活性污泥（CAS）和好氧颗粒污泥（AGS）反应器性能的影响。最初给两个反应器进料100％合成进料。以逐步的方式，将进料组成缓慢改变为从当地废水处理厂收集的真实主要废水。经过最初的稳定期后，两个反应器均可实现90％以上的NH4 + -N去除率。但是，AGS中的PO43-P去除率最终达到最大值，而CAS中则达到88％。在两个反应器中对COD去除的影响最小，当喂入100％真实废水时，AGS和CAS中的去除率最低，分别为81±3％和62±4％。尽管颗粒破裂，AGS反应器仍能够去除污染物（COD，N，P）。在AGS系统中，聚磷酸盐累积菌（Candidatus Accumulibacter）的积累在整个运营阶段有所增加：II（6.2％），III（10.32％）和IV（11.9％）。在CAS中，它从第一阶段增加到第二阶段（12.6％），但是在第三阶段下降到9.9％。基于属的分类显示，AGS中硝化螺菌的相对丰度连续增加，分别在III期的11.05％和IV期的10.3％。与它在CAS中的存在相反，在第三阶段为3.4％，在第四阶段为9.5％。基于属的分类显示，AGS中硝化螺菌的相对丰度连续增加，分别在III期的11.05％和IV期的10.3％。与它在CAS中的存在相反，在第三阶段为3.4％，在第四阶段为9.5％。基于属的分类显示，AGS中硝化螺菌的相对丰度连续增加，分别在III期的11.05％和IV期的10.3％。与它在CAS中的存在相反，在第三阶段为3.4％，在第四阶段为9.5％。

更新日期：2020-04-06

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