Method for treating waste water by microbial directional produced enzyme

Abstract

The invention relates to a method for treating waste water by microbial directional produced enzyme. The method comprises the following steps and technical conditions of: 1) preparation of nutrition liquid for culture: the nutrition liquid for culture comprises 1 to 10 percent of organic nutrition, 0.5 to 2 percent of A type inorganic nutrition, 0.1 to 0.5 percent of B type inorganic nutrition, 0.3 to 1.5 percent of trace elements and 1.5 to 7 percent of biological auxin; 2) preparation of culture liquid of activation microbes: the culture liquid consists of water and nutrition liquid required by spore state microbes and activated spore type microbes; 3) preparation of nutrition liquid for secondary metabolism: the nutrition liquid for the secondary metabolism comprises 0.5 to 2 percent of A type inorganic nutrition, 0.1 to 0.5 percent of B type inorganic nutrition, 0.3 to 1.5 percent of trace elements and 1.5 to 7 percent of biological auxin; 4) preparation of culture liquid of stimulated microbial secondary metabolism produced enzyme: the culture liquid consists of the culture liquid obtained in the second step, the nutrition liquid for secondary metabolism obtained in the third step, sterilized industrial waste water, sterilized dechlorination tap water; and 5) on-site continuous bacterial liquid addition. The method has the advantage that through the secondary metabolism produced enzyme, the system stability and the removal capability of a system on difficult-degradation organic matters are effectively improved.

Description

Technical field: [0001] The invention relates to water, waste water and sewage treatment, more specifically to a method for treating waste water by directional enzyme production by microorganisms. Background technique: [0002] Refractory industrial wastewater refers to the wastewater generated in the production process of printing and dyeing, papermaking, medicine, chemical industry and so on. The pollutants in these wastewaters are difficult to biodegrade, characterized by the B / C of the wastewater being less than 0.2. Therefore, pretreatment techniques and methods must be used in order to effectively deal with it. At present, there are three main solutions for these refractory industrial wastewater, namely hydrolytic acidification, micro-electrolysis and bio-enhancement technology. [0003] Hydrolytic acidification controls anaerobic hydrolysis and acidification stages, and uses hydrolysis and acid-producing microorganisms to degrade solids, macromolecules and non-biode...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the scope of application is limited

The disadvantage of this method is that the operating cost is high, the process is not yet mature, and it is prone to hardening and passivation.

Therefore, such bioaugmentation methods are generally ineffective and expensive

[0007] There are also some enterprises, although the high-efficiency complex flora in the spore state have been activated and cultivated, but they have not undergone secondary metabolism to produce enzymes, the microbial adaptability is poor, and the treatment effect is not ideal, especially for those refractory organic wastewater.