5 results about "Paracoccus sp." patented technology

The invention relates to the technical field of environmental microbial resource development and sewage denitrification. The invention discloses an efficient denitrification strain Paracoccus sp.N21 with a flocculation characteristic, which is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.34710. The invention further discloses a preparation method of the efficient denitrification strain Paracoccus sp.N21. The strain obtained by the invention can completely remove ammonia nitrogen within 12 hours and thoroughly remove nitrate nitrogen within 48 hours, the removal rate reaches 100%, and ammonia nitrogen is preferentially degraded in a mixed nitrogen source. The method has the unique advantages that the flocculation rate in the nitrification process and the flocculation rate in the denitrification process exceed 93.9%, and the usage amount of a flocculating agent can be greatly reduced. When actual kitchen wastewater is treated, the ammonia nitrogen removal rate reaches 100%, and the removal rate reaches up to 7.51 mg / (L.h). The application of the strain can effectively reduce the volume of a reactor, reduce energy consumption and operation cost, provides a new solution for simplifying a biological denitrification process, is particularly suitable for treating high-ammonia-nitrogen kitchen wastewater, and has remarkable environmental and economic benefits.

This invention discloses a lipophilic yeast strain for synthesizing astaxanthin (Yersinia lipophila). Yarrowia lipolytica This invention relates to an engineered strain, its construction method, and its application. The engineered strain is a *Yersinia lipolytica* strain carrying CrtZ and CrtW. The invention utilizes genetic engineering methods to introduce a *Yersinia lipolytica* strain derived from *Rhodochophora* into a β-carotene-producing strain via genetic engineering. Haematococcus Pluvialis The β-carotene hydroxylase encoding gene (HpCrtZ) originates from the genus Paracoccus ( Paracoccus sp. The gene encoding β-carotene ketolase (PsCrtW) and the gene derived from Saccharomyces cerevisiae (Saccharomyces cerevisiae) Saccharomyces cerevisiae The method involves obtaining a genetically engineered *Yersinia lipolytica* strain that produces astaxanthin by constructing a fusion enzyme complex and fusing it with peroxisomes, endoplasmic reticulum, and lipid droplet-targeting signal peptides to obtain a *Yersinia lipolytica* strain with higher astaxanthin yield. The astaxanthin-producing genetically engineered strain constructed in this invention achieved an astaxanthin yield of 1.43 g / L in a 5 L bioreactor after pH control and continuous feeding optimization.

The invention relates to the field of microorganisms, in particular to a nitrophilic bacterium for wastewater treatment as well as a culture method and application of the nitrophilic bacterium. According to the present invention, the nitrophile is Paracoccus sp. HF-E2025009, and is preserved in the China General Microbiological Culture Collection Center (CGMCC) on December 8, 2025, and the preservation number is CGMCC No.36935; the strain can keep stable ammonia oxidation activity under the conditions of high ammonia nitrogen and high sulfate; the system can be started in a short time, the ammonia nitrogen removal effect is obvious, and synchronous nitrogen removal and partial organic matter and sulfate removal are realized; a large amount of organic carbon or expensive chemical reagents do not need to be added in the subsequent denitrification step, and the overall cost is reduced; the process is simple, large-scale transformation of the existing treatment device is not needed, and the method has a wide prospect in the aspect of wastewater treatment.

This invention relates to a method for treating high-concentration inorganic nitrogen wastewater using a mixed culture of *Paragonimus* strains wg2 and wg1, belonging to the field of resource and environmental microbiology. This invention utilizes the co-culture of strains wg2 and wg1 to treat simulated wastewater, primarily exploring the effect of the mixed strains wg2 and wg1 on NO2 under anoxic conditions. ‑ -N, NO3 ‑ The study investigated the nitrogen removal capacity of nitrite-nitrogen (N), the optimal ratio of mixed bacteria, and the nitrogen removal performance of the mixed bacteria in treating simulated wastewater. Results showed that *Paragonimus* strains wg2 and wg1 acted synergistically in a mixed culture system, effectively addressing both nitrite accumulation and efficient nitrate degradation, demonstrating high nitrogen removal capacity. This study provides important practical guidance for the development of biological nitrogen-removing agents that simultaneously remove nitrite and nitrate.

The present application relates to the field of microorganisms, in particular to a kind of nitrogen-loving bacteria for wastewater treatment and its culture method and application.The nitrogen-loving bacteria of the present application is Paracoccus Paracoccus sp. HF-E2025009, preserved in China General Microbiological Culture Collection Center on December 8, 2025, with the preservation number of CGMCC No.36935.The strain can maintain stable ammonia oxidation activity under high ammonia nitrogen and high sulfate conditions;the system can be started in a short period of time, the ammonia nitrogen removal effect is obvious, the simultaneous denitrification and partial organic matter and sulfate removal are realized;the subsequent denitrification step does not need a large amount of additional organic carbon or expensive chemical reagent, the overall cost is reduced;the process is simple to install, does not need large-scale modification of existing treatment device, and has broad prospects in wastewater treatment.