A method for enhancing the biochemical effect of water treatment by using microbial preparations

Abstract

The invention discloses a microbial preparation which comprises pseudomonas stutzeri, bacillus subtilis, lactobacillus, alcaligenes faecalis and aspergillus niger. The invention further discloses a preparation method of the microbial preparation and a method of strengthening the biochemical water treatment effects by the microbial preparation. The pseudomonas stutzeri, the bacillus subtilis, the lactobacillus, the alcaligenes faecalis and the aspergillus niger in the microbial preparation can form dominant bacterial communities in a sewage treatment system, strengthen the treatment effects of COD (chemical oxygen demand) and the like in sewage, and particularly can form advantages in a printing and dyeing sewage treatment system after matching with aniline-degrading bacteria and aerobic denitrifying bacteria, so that printing and dyeing sewage COD, aniline, chroma and total nitrogen are rapidly degraded in a targeted manner, and the printing and dyeing sewage treatment effects are strengthened.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for enhancing the biochemical treatment effect of sewage by adopting a special microbial preparation. Background technique [0002] Biological (biochemical) treatment is the leading technology for domestic sewage and organic industrial sewage such as printing and dyeing sewage, papermaking sewage, petrochemical sewage, food processing sewage, etc. COD (organic matter), nitrogen, phosphorus and other aspects play an important role in sewage. The essence of biological treatment is to use the metabolism of various microorganisms to oxidize, decompose, and transform pollutants in sewage, so that soluble macromolecular organic matter and insoluble organic matter in sewage are converted into soluble small molecular organic matter, and finally into CO 2 、H 2 O, CH 4 , N 2 etc., to achieve the purpose of purifying water quality. [0003] Therefore, the c...

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Problems solved by technology

[0004] At present, there are still many defects in the biological treatment process of sewage, which affect the further improvement of the efficiency of sewage biochemical treatment. For example, in various sewage biological treatment, natural sludge is generally used to cultivate and domesticate microorganisms. Although the process is mature, it has some pertinence. and poor adaptability, long cultivation and acclimation period, etc.; the industrial sewage biochemical treatment system has poor impact resistance, and has high requirements for influent water volume, pollutant concentration, temperature, pH, etc. When the influent situation and temperature change, Unstable operation or even system collapse; toxic and harmful substances and high salt content in some industrial wastewater will inhibit the growth of microorganisms and even cause microbial inactivation, difficult to cultivate and domesticate microorganisms, and low treatment efficiency such as COD

In addition, with the increasingly stringent national pollutant discharge standards, the removal efficiency of some special pollutants contained in industrial sewage is low in the current biochemical process, and it is difficult to meet the discharge standards: for example, printing sewage contains a large amount of urea, total nitrogen in wastewater As high as 70-100mg / L or more, while the sewage discharge standard requires less than 15mg / L, the existing biochemical process commonly used in printing and dyeing sewage treatment can hardly bear such a high nitrogen load; some printing and dyeing sewage contains a large amount of azo dyes, such pollutants The concentration of anilines formed after anaerobic treatment reaches 6-10mg / L, and the emission standard requires 1mg / L or even not to be detected, but the existing aerobic biochemical process is not efficient in its treatment