3 results about "Geosmin" patented technology

The application belongs to the technical field of water quality safety intelligent monitoring, and discloses a single smell substance intelligent detection and self-checking system based on an electronic nose sensor array and multi-source information cooperation, which comprises an electronic nose sensor array module (containing a geosmin specificity sensor, a dimethyl isochroman specificity sensor and a dimethyl trisulfide specificity sensor), a multi-parameter monitoring module, a machine learning data processing module and a result output module; the multi-parameter monitoring module collects the dissolved oxygen consumption rate, pH value, conductivity and water temperature of water bodies in real time; and the machine learning data processing module establishes a dynamic correlation model of the single smell substance concentration and characteristic parameters through a machine learning algorithm. The application effectively solves the false positive misjudgment problem under the interference of a complex matrix, improves the detection accuracy to more than 95%, and has a concentration prediction error of less than or equal to 5%, thereby providing reliable technical support for the prevention and control of single smell pollution in drinking water, surface water and other water bodies.

The application discloses a method for rapidly detecting geosmin-producing Streptomyces in Daqu samples, and relates to the technical field of liquor brewing microbial detection, and comprises the following steps: selectively culturing target Daqu samples to obtain Streptomyces enrichment culture solution; extracting nucleic acids from the Streptomyces enrichment culture solution and performing probe method fluorescence quantitative PCR amplification to obtain Streptomyces specificity fluorescence signal determination results; performing pretreatment to obtain a to-be-tested sample extract; performing quantitative analysis to obtain geosmin and its content data; and integrating the data to obtain the final determination results of geosmin-producing Streptomyces. The application combines the enrichment, probe method fluorescence quantitative PCR and GC-MS quantification, realizes integrated detection of Streptomyces identification and geosmin quantification in Daqu, and greatly improves the detection integrity and efficiency. The specific probe method qPCR combined with the optimized HS-SPME-GC-MS condition significantly improves the specificity and sensitivity of target bacteria and odor-causing substance detection, and effectively avoids false positives and matrix interference.

The application discloses micro-polluted water smell targeting composite biological filter material and preparation and application thereof, the filter material is a spherical particle, and sequentially comprises a high-density manganese sand core accounting for 75% of the diameter, an amino-chitosan biological affinity layer accounting for 15%-20%, and a COF-graphene hybrid adsorption layer accounting for 5%-10%; the three-layer structure cooperatively realizes selective adsorption, electrochemical activation and biological mineralization of geosmin, 2-MIB and other odor-causing substances; the outer layer is rich in easily degradable nutrients for metabolism of the middle-layer indigenous bacteria, the inner layer delta-MnO2 and graphene construct an electron transfer channel, and oxidation degradation is strengthened; the filter material has excellent sedimentation, mechanical strength and self-sustaining ecological functions, and significantly improves long-term, stability and impact resistance of smell removal, and is suitable for deep treatment of drinking water.