Enhanced granulation and methane recovery at low load by downflow sludge circulation in anaerobic treatment of domestic wastewater

Enhanced granulation and methane recovery at low load by downflow sludge circulation in anaerobic... Bioresource Technology 249 (2018) 851–857 Contents lists available at ScienceDirect Bioresource Technology journal homepage: www.elsevier.com/locate/biortech Enhanced granulation and methane recovery at low load by downflow sludge circulation in anaerobic treatment of domestic wastewater Yangyang Liu, Lihui Huang , Guihua Dong, Gaofeng Liu, Xueyuan Wu, Chuang Wang, Xiaowei Liu, Lisha Wang School of Environmental Science and Engineering, Shandong University, Jinan 250100, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: The effects of downflow sludge circulation on granulation and methane recovery at low load were investigated Downflow sludge circulation for domestic wastewater treatment in a modified anaerobic reactor. Compared with conventional upflow Granulation anaerobic reactors, enhanced granulation with shortened start-up time was achieved and stable granules were Mass transfer successfully cultivated only after 58 days operations. The introduction of downflow sludge circulation resulted in Methane recovery reverse wastewater-sludge flow and uniform sludge distribution in the reaction zone, which contributed to Microbial community enhanced wastewater-sludge mass transfer and satisfactory performance with a high soluble chemical oxygen demand (SCOD) removal efficiency of 94.8% at hydraulic retention time (HRT) 6 h. Besides, enhanced liquid-to- gas mass transfer caused a lower dissolved CH saturation index of 1.11 and a higher CH recovery efficiency http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bioresource Technology Elsevier

Enhanced granulation and methane recovery at low load by downflow sludge circulation in anaerobic treatment of domestic wastewater

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0960-8524
D.O.I.
10.1016/j.biortech.2017.10.091
Publisher site
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Abstract

Bioresource Technology 249 (2018) 851–857 Contents lists available at ScienceDirect Bioresource Technology journal homepage: www.elsevier.com/locate/biortech Enhanced granulation and methane recovery at low load by downflow sludge circulation in anaerobic treatment of domestic wastewater Yangyang Liu, Lihui Huang , Guihua Dong, Gaofeng Liu, Xueyuan Wu, Chuang Wang, Xiaowei Liu, Lisha Wang School of Environmental Science and Engineering, Shandong University, Jinan 250100, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: The effects of downflow sludge circulation on granulation and methane recovery at low load were investigated Downflow sludge circulation for domestic wastewater treatment in a modified anaerobic reactor. Compared with conventional upflow Granulation anaerobic reactors, enhanced granulation with shortened start-up time was achieved and stable granules were Mass transfer successfully cultivated only after 58 days operations. The introduction of downflow sludge circulation resulted in Methane recovery reverse wastewater-sludge flow and uniform sludge distribution in the reaction zone, which contributed to Microbial community enhanced wastewater-sludge mass transfer and satisfactory performance with a high soluble chemical oxygen demand (SCOD) removal efficiency of 94.8% at hydraulic retention time (HRT) 6 h. Besides, enhanced liquid-to- gas mass transfer caused a lower dissolved CH saturation index of 1.11 and a higher CH recovery efficiency

Journal

Bioresource TechnologyElsevier

Published: Feb 1, 2018

References

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