Potential application of Alcaligenes faecalis strain No. 4 in mitigating ammonia emissions from dairy wastewater

George M Neerackal; Pius M Ndegwa; Hung-Soo Joo; Xiang Wang; Craig S Frear; Joseph H Harrison; Marc W Beutel

doi:10.1016/j.biortech.2016.01.063

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Potential application of Alcaligenes faecalis strain No. 4 in mitigating ammonia emissions from dairy wastewater

Journal article

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Potential application of Alcaligenes faecalis strain No. 4 in mitigating ammonia emissions from dairy wastewater

George M Neerackal, Pius M Ndegwa, Hung-Soo Joo, Xiang Wang, Craig S Frear, Joseph H Harrison and Marc W Beutel

Bioresource technology, Vol.206, pp.36-42

04/2016

DOI: https://doi.org/10.1016/j.biortech.2016.01.063

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https://hdl.handle.net/2376/104157

PMID: 26845217

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https://doi.org/10.1016/j.biortech.2016.01.063View

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Abstract

Biological nitrogen removal

Nitrification-denitrification

Batch aeration

Nitrogen gas

Oxygenation

•A bioprocess for mitigating NH3 emissions from dairy wastewater is presented.•The bacterium A. faecalis strain No. 4 is viable for treating dairy wastewater.•Flushing reactor headspace with oxygen enhances this bioprocess.•Supplementing the wastewater with carbon also boosts this bioprocess. This research examined the potential mitigation of NH3 emissions from dairy manure via an enhanced aerobic bio-treatment with bacterium Alcaligenes faecalis strain No. 4. The studies were conducted in aerated batch reactors using air and pure oxygen. Aeration with air and oxygen removed approximately 40% and 100% total ammoniacal nitrogen (TAN), respectively. Intermittent oxygenation (every 2 or 4h) reduced oxygen consumption by 95%, while attaining nearly identical TAN removal to continuous aeration. The results revealed that adequate oxygen supply and supplementing dairy wastewater with carbon are essential for this bioprocess. Based on the nitrogen mass balance, only 4% of TAN was released as NH3 gas, while the majority was retained in either the microbial biomass (58%) or converted to nitrogen gas (36%). The mass balance results reveal high potential for environmentally friendly bio-treatment of dairy wastewater using A. faecalis strain No. 4 with respect to NH3 emissions.

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Title: Potential application of Alcaligenes faecalis strain No. 4 in mitigating ammonia emissions from dairy wastewater
Creators: George M Neerackal - Department of Biological Systems Engineering, Washington State University, PO Box 646120, Pullman, WA 99164, USA
Pius M Ndegwa - Department of Biological Systems Engineering, Washington State University, PO Box 646120, Pullman, WA 99164, USA
Hung-Soo Joo - School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-Gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
Xiang Wang - Department of Biological Systems Engineering, Washington State University, PO Box 646120, Pullman, WA 99164, USA
Craig S Frear - Department of Biological Systems Engineering, Washington State University, PO Box 646120, Pullman, WA 99164, USA
Joseph H Harrison - Department of Animal Sciences, Washington State University, 2606 West Pioneer, Puyallup, WA 98371, USA
Marc W Beutel - School of Engineering, University of California Merced, 5200 North Lake Road, Merced, CA 95343, USA
Publication Details: Bioresource technology, Vol.206, pp.36-42
Academic Unit: Animal Sciences, Department of; Biological Systems Engineering, Department of; Chemical Engineering and Bioengineering, School of
Publisher: Elsevier Ltd
Identifiers: 99900546710601842
Language: English
Resource Type: Journal article