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Open AccessArticle

Intermittent Aeration in a Hybrid Moving Bed Biofilm Reactor for Carbon and Nutrient Biological Removal

1
Faculty of Engineering and Architecture, University of Enna “kore”, Cittadella Universitaria, 94100 Enna, Italy
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Department of Engineering, University of Palermo, Viale delle Scienze ed.8, 90128 Palermo, Italy
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College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Yangpu District, Shanghai 200092, China
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School of Environmental and Municipal Engineering, Tianjin Chengjian University, 26 Jinjing Road, Xiqing District, Tianjin 300384, China
*
Author to whom correspondence should be addressed.
Water 2020, 12(2), 492; https://doi.org/10.3390/w12020492
Received: 31 December 2019 / Revised: 7 February 2020 / Accepted: 9 February 2020 / Published: 12 February 2020
(This article belongs to the Section Water and Wastewater Treatment)
The paper presents an experimental study on a lab scale hybrid moving bed biofilm reactor with intermittent aeration. Specifically, a comparison between two different operating conditions was analyzed: continuous and intermittent aeration. Both continuous and intermittent aeration were monitored and compared in order to get the best operational conditions. The intermittent aeration campaign was sub-divided in three phases with different duration of alternation of aerobic and anoxic times and organic and nitrogen loading rates. The efficiency of N-removal improved by 70% during the intermittent aeration. The best condition was observed with 40 min of aeration and 20 min of no-aeration, an organic loading rate of 2.2 kgCODm−3day−1 and a nitrogen loading rate of 0.25 kgNm−3day−1: under these operational conditions the removal efficiencies for carbon and nitrogen were 93% and 90%, respectively. The derived results provide the basis for WWTP upgrade in order to meet stricter effluent limits at low energy requirements.
Keywords: advanced wastewater treatment; intermittent aeration; SND; kinetic tests advanced wastewater treatment; intermittent aeration; SND; kinetic tests
MDPI and ACS Style

Di Bella, G.; Mannina, G. Intermittent Aeration in a Hybrid Moving Bed Biofilm Reactor for Carbon and Nutrient Biological Removal. Water 2020, 12, 492.

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