AI Article Synopsis
- Researchers identified a thermotolerant strain, Gordonia paraffinivorans N52, from sludge composting that can perform heterotrophic nitrification at high temperatures (60℃).
- The strain effectively utilized 51.8% of ammonium nitrogen, converting 25.5% into nitrification intermediates and 53.0% into intracellular nitrogen, while only losing 5.2%.
- Adding Gordonia paraffinivorans N52 to sewage sludge composting reduced ammonia emissions by 27.6% and improved nitrogen retention, suggesting it can enhance composting efficiency.
Article Abstract
A thermotolerant strain with heterotrophic nitrification capability obtained from sludge composting was identified as Gordonia paraffinivorans N52. Strain N52 utilized 51.8% of ammonium nitrogen (NH-N) at 60℃, and the nitrogen balance results indicated that 25.5% of the consumed NH-N was changed into nitrification intermediates, 53.0% to intracellular nitrogen, and only 5.2% was lost. The successful detection of enzymes related to nitrification and PCR amplification of functional genes further demonstrated nitrification ability of the isolated strain. Moreover, orthogonal test indicated that conditions for the optimal nitrification performance were C/N 15, 50℃, 150 rpm and pH 8. Compared with the control group, the addition of Gordonia paraffinivorans N52 to sewage sludge composting reduced 27.6% of ammonia emissions, accelerated the conversion from NH-N to nitrate nitrogen and decreased the total nitrogen loss. These results suggested that inoculation of Gordonia paraffinivorans N52 effectively controlled ammonia emissions and reduced nitrogen loss in composting.
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| http://dx.doi.org/10.1016/j.biortech.2022.127959 | DOI Listing |
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Article Synopsis
- Researchers identified a thermotolerant strain, Gordonia paraffinivorans N52, from sludge composting that can perform heterotrophic nitrification at high temperatures (60℃).
- The strain effectively utilized 51.8% of ammonium nitrogen, converting 25.5% into nitrification intermediates and 53.0% into intracellular nitrogen, while only losing 5.2%.
- Adding Gordonia paraffinivorans N52 to sewage sludge composting reduced ammonia emissions by 27.6% and improved nitrogen retention, suggesting it can enhance composting efficiency.
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