A microbial method for the domesticated and co-metabolic degradation of 2,4,6-trichlorophenol using domestic sewage as a carbon source

Abstract

The invention discloses a microbial method for domesticating and co-metabolicly degrading 2,4,6-trichlorophenol using domestic sewage as a carbon source, belonging to the technical field of sewage biological treatment. The present invention uses SBR as the main reaction device, inoculates the activated sludge in the secondary sedimentation tank of the urban sewage treatment plant, and adopts the domestic sewage as the co-metabolism carbon source of the SBR reactor, and artificially configured 2,4,6-trichlorophenol as the Treat wastewater. That is, domestic sewage was used as a carbon source to cultivate microorganisms first, and after the activated sludge recovered its activity, the water distribution containing 2,4,6-trichlorophenol was introduced into the SBR according to the gradient concentration for aeration and acclimatization, and the microorganisms with a certain degradation ability were obtained. Activated sludge, the system can run stably and remove more than 80mg / L of 2,4,6-trichlorophenol. The present invention uses domestic sewage as a co-metabolism carbon source, does not rely on artificial addition of other carbon sources, reduces the actual treatment cost of phenol-containing wastewater, and due to the rich variety of domestic sewage carbon sources, to a certain extent promotes microbial p-chlorophenol Compared with adding a single carbon source, it is more advantageous than adding a single carbon source, and has guiding significance for the treatment of actual phenol-containing wastewater.

Description

technical field [0001] The invention belongs to the field of sewage biological treatment, and in particular relates to a microbial method for acclimating and co-metabolically degrading 2,4,6-trichlorophenol using domestic sewage as a carbon source. The method can be used in environments containing 2,4,6 -Treatment of trichlorophenol wastewater. Background technique [0002] Trichlorophenol is widely used in industrial production. Due to substandard discharge, high concentrations of trichlorophenol are often contained in factory effluent. As a typical industrial raw material, 2,4,6-trichlorophenol has a wider range of applications. Since trichlorophenol can cause the "three causes" effect, it has been listed as a priority pollutant to be controlled. [0003] At present, co-metabolism, as a biological treatment technology that can effectively remove toxic pollutants, has been widely used in wastewater treatment. Co-metabolism refers to the addition of one or more harmless o...

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Problems solved by technology

[0005] Aiming at the problem of excessive investment in the domestication of microorganisms and the operation of degradation devices in traditional co-metabolism technology, the present invention proposes a microbial method for domestication and co-metabolism degradation of 2,4,6-trichlorophenol using domestic sewage as a carbon source

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