Nitrogen removal characteristics and salt tolerance mechanisms of the novel bacterium Halomonas sp. W07 in saline wastewater treatment.

The extremely high osmotic pressure that frequently emerges in industrial wastewater will notably impact microorganisms' survival and nitrogen removal efficiency. A newly isolated Halomonas sp. strain W07 demonstrated the ability to efficiently remove nitrate and nitrite at an average rate of 4.68 and 5.56 mg/L/h, respectively, under an 8 % salinity condition. Whole-genome sequencing and nitrogen balance analysis revealed that W07 utilize the dissimilatory nitrate reduction to ammonium (DNRA) and ammonium assimilation pathways, including genes nap, nar, nasA, nir, glnA, gltBD, and gdhA2, to accomplish efficient nitrogen assimilation and removal in a high-salt environment. Furthermore, the expression of genes associated with salinity tolerance in W07 suggested that the strain can withstand osmotic stress by enhancing extracellular polymer secretion and facilitating the transport and synthesis of compatible solutes. The notable nitrogen removal efficiency and high salinity tolerance exhibited by strain W07 make it a promising candidate for nitrate removal under high-salt conditions.

• Publication year

  2025

• Venue

  Bioresource Technology

• Publication date

  2025-03-03

• Fields of study

  Biology, Medicine, Environmental Science

• Identifiers
  DOI 10.1016/j.biortech.2025.132338PMID 40044054
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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