Method for degrading heavy metals in sludge by microorganisms, product and application

• Main Authors: TAO RUNZHI, SHI YANG, FENG ZEJUAN
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; MANUFACTURE THEREOF; METALLURGY; MICROBIOLOGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS; MUTATION OR GENETIC ENGINEERING; ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE; PROCESSES USING MICROORGANISMS; SPIRITS; VINEGAR; WINE

The invention discloses a method for degrading heavy metals in sludge by microorganisms, a product and application, and relates to the technical field of microbial engineering. The method comprises the following steps: firstly, mixing crushed straws with sludge, then adding cellulase and bacillus subtilis to obtain a stacked mixture, and then carrying out high-temperature drying treatment on the stacked mixture to obtain a dried mixture; primary fermentation: uniformly mixing the dry mixture with pichia kudriavzevii, and fermenting for 2-5 days under the conditions that the humidity is 50-75% and the temperature is 30 DEG C to obtain a primary fermentation product; and secondary fermentation: mixing the dry mixture with the primary fermentation product to obtain a secondary raw material, adding thiobacillus ferrooxidans, and fermenting for 2-5 days to obtain a final fermentation product. According to the present invention, the obtained fermentation product can be used as the organic fertilizer to improve and