A kind of gentamicin fermentation waste liquid solid-liquid separation treatment method

Abstract

The invention discloses a solid-liquid separation treatment method for gentamicin fermentation waste liquid. After conditioning and modifying the gentamicin fermentation waste liquid, the filtration specific resistance of the fermentation waste liquid is reduced, and then filtered through a plate and frame. It can effectively intercept suspended solids (SS), increase the filtration speed of fermentation waste liquid, and prevent suspended solids in fermentation waste liquid from entering the water treatment biochemical system and causing serious impact on the biochemical system. The key technology of conditioning modification is to add lovastatin fermented bacteria residue, which belongs to the waste of fermented raw materials, and has the characteristics of large particle size, light weight after drying, and water swelling. The water content of the fungus residue obtained after filtration in the invention can reach below 70%, which reduces the amount of residue produced and is beneficial to the subsequent drying and incineration of the fungus residue. At the same time, the filtered filtrate is clarified, free of SS, and COD can be reduced by 50%, which is beneficial to the subsequent entry into the biochemical treatment system.

Description

technical field

[0001] The invention relates to a solid-liquid separation treatment method for gentamicin fermentation waste liquid. The invention belongs to the technical field of industrial wastewater treatment. Background technique

[0002] The production process of gentamicin is biological fermentation, and the fermentation waste liquid contains a large amount of mycelium, residual medium, sugars that are not fully utilized by microorganisms, inorganic salts, proteins, bacterial micelles and other microbial metabolites. Its characteristic is that the solid content of the fermentation suspension is low, generally about 1-3%, and most of the suspension is water. The suspended particles are small, the relative density is not much different from that of the liquid phase, and the liquid phase has a high viscosity, which is a non-Newtonian fluid. It is unstable in nature and changes with time and temperature. The solid-liquid separation of Qingda fermentation waste liquid i...

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