Isolation of a marine-derived yeast with potential applications in industrial nitrite utilizing.

The nitrite efficient utilization microorganism RZWP01 was identified. Using nitrite and ammonium as the sole nitrogen source, the nitrogen removal rate of RZWP01 was 97.4% and 87.1%, respectively. RZWP01 grew well in the nitrite medium with glucose or xylose as the only carbon source. However, the RZWP01 cannot live on the nitrite medium with lactose, citric acid, and methanol as the only carbon source. The maximal cell concentration occurred in the nitrite medium with glucose as the only carbon source at a C/N ratio of 20 for 48 h, reaching 8.92 × 10 cell mL. RZWP01 was the first reported yeast that can efficiently utilize nitrite. The isolation and identification of RZWP01 enriched the microbial resources of nitrite-degrading microorganisms and provided functional microorganisms for the water treatment of sustainable aquaculture.