111 results about "Antibiotic degradation" patented technology

The invention discloses a degradation bacteria for sulfonamide antibiotics and an application thereof, wherein the bacteria is Sakaguchia cladiensis A5 and is preserved in Guangdong Center of Microbial Culture Collection at Jan. 26th, 2018, and is assigned the accession number of GDMCC No.60319. The bacterial strain has great degradation effect on sulfonamide antibiotics such as sulfamerazine, sulfamethoxazole and the like, and can be used for degradation treatment to sulfonamide antibiotics pollution to application objects comprising wastewater, waste residue, water environment, soil and thelike, which contain the sulfonamide antibiotics. The bacterial strain can reduce damage on ecological environmental safety due to the antibiotics, is energy-saving and environment-friendly, and has extensive application prospect.

The invention discloses a composting method capable of efficiently degrading antibiotics in livestock excrements. Degradation of a plurality of antibiotics, such as sulfonamides, tetracyclines, macrolides and fluoroquinolones, in a compost can be obviously promoted by adding an antibiotic degradation promoter with a specific using amount into a composting raw material and using specific composting steps, and meanwhile, available heavy metal content in the compost is reduced. The antibiotic degradation promoter consists of an activated carbon and an attapulgite, and can also be used with a biological activated carbon comprising the activated carbon and phanerochaete chrysosporium.

The invention discloses a composting method for adding auxiliary materials to quickly remove tetracycline antibiotics in biogas residue. The composting method comprises the following steps: mixing biogas residue with fresh pig manure, wheat dry straws and wood vinegar which is diluted by 500 times according to parts by weight, evenly stirring to obtain mixture, adding charcoal into the mixture, and evenly mixing to obtain composting raw materials, wherein the dry substance ratio of the mixture to the charcoal is (80-100):1; putting the composting raw materials in an aerobic fermentation tank to be subjected to aerobic composting to obtain a composting product of which the antibiotics are removed. According to the composting method, the auxiliary materials can be added to shorten compost body warming time and prolong a high temperature phase, antibiotic degradation in a biogas residue composting process is accelerated, antibiotic residues in the composting product can be lowered, and the subsequent utilization risk of the biogas residues is lowered.

The invention provides a photoelectrocatalysis and microbial fuel cell coupling system for treating antibiotics, and belongs to the technical field of difficult-to-degrade pollutant treatment and energy recovery and utilization. An electrogenesis biological anode of a microbial fuel cell (MFC) is coupled with a photoelectrocatalysis anode to form a coupled electrogenesis catalytic degradation antibiotic system; a photocatalysis anode of the system is of a net structure with a nickel net loaded with a hydrothermal TiO2 catalyst; the biological anode of the system is a carbon brush loaded with electrogenesis microorganisms; and a cathode of the system is a common carbon brush; the cathode and the anode are separated by an ion exchange membrane. The effect of the system in the degradation ofdifficult-to-degrade antibiotics by an anode is obviously superior to that of a traditional microbial fuel cell or a photoelectrocatalysis system; and degradation reaction of the traditional microbialfuel cell is carried out under the condition of the absence of light. According to the advantages of the device, the MFC system and the photocatalysis system are coupled, the problems that an existing MFC is low in degradation efficiency and low in power generation can be solved, and the degradation efficiency of the antibiotics is higher, and the degradation of the antibiotics is more thorough.

The invention discloses a method for degrading antibiotics in livestock manure. The method includes the steps: firstly, fermenting and degrading the antibiotics in the livestock manure for the first time by resistant bacillus pumilus, sphingomonas xenophaga, Aspergillus niger and trichoderma viride; secondly, further degrading the antibiotics into small molecule substances by the aid of algae decomposing agents and an infrared radiation technology; finally, inactivating microorganisms at high temperature generated by secondary fermentation. According to the method, the antibiotics in the livestock manure can be effectively degraded into small molecule non-toxic substances, worm eggs in the manure can be killed, harm of the antibiotics in the livestock manure to environments is fundamentally avoided, the livestock manure subjected to secondary fermentation can be prepared into organic fertilizers and recycled, and waste is turned into wealth.

The invention discloses immobilized laccase and a preparation method thereof, and application of the immobilized laccase in antibiotic degradation. The preparation method comprises the following steps: adding laccase into a solution containing copper ions, carrying out uniform mixing, then adding a trimesic acid solution, carrying out uniform mixing, performing centrifuging to remove a supernatant, conducting cleaning with a cleaning solution, and carrying out drying in vacuum to obtain the immobilized laccase. The method is simple to operate; the laccase can be coated in a carrier; and an organic framework structure provides shell protection for the laccase, and damage to the structure of the laccase due to external factors such as friction and shearing force in the use process is avoided. According to the invention, reduction in enzyme activity avoided, and the enzyme activity is greatly improved (the enzyme activity of the immobilized laccase obtained by the immobilization method is1.5-30 times of the activity of equivalent free laccase). The immobilized laccase disclosed by the invention has efficient catalytic degradation capability on antibiotics such as tetracycline, ampicillin, tetracycline derivatives and derivatives of ampicillin, can achieve an effect close to complete degradation in an extremely short time, and is good in reusability and free of secondary pollution.

The invention discloses a carbon quantum dot-nickel titanate compounded degradation agent for degrading antibiotics and a preparation method of the carbon quantum dot-nickel titanate compounded degradation agent. The preparation method comprises the steps that 1, nickel acetate, tetrabutyl titanate and sodium citrate are added into an organic solvent, the materials are mixed to be uniform, and a nickel titanate precursor solution is obtained; 2, ethidene diamine is added into the water solution of glucose, reacting is carried out at the temperature of 140 DEG C to 220 DEG after the materials are stirred to be uniform, the time ranges from 3 h to 8 h, and a carbon quantum dot solution is obtained; 3, the nickel titanate precursor solution obtained in the step 1 and the carbon quantum dot solution obtained in the step 2 are mixed, a hydrothermal reaction is carried out at the temperature of 120 DEG C to 150 DEG C after the materials are stirred to be uniform, the time ranges from 18 h to 24 h, centrifugation is carried out after the reaction is completed, sediment products are subjected to aftertreatment, and the carbon quantum dot-nickel titanate compounded degradation agent is obtained. The preparation method is simple in process and low in cost, and the prepared carbon quantum dot-nickel titanate compounded degradation agent is high in degradation efficiency on antibiotics and good in photocatalysis stability.