A kind of activated sludge for treating high-salt and phenol-containing wastewater and its application

Abstract

The invention provides activated sludge for treating high-salinity phenol-containing wastewater as well as a preparation method and an application of the activated sludge. After excess sludge in a biological treatment stage for wastewater in a petrochemical plant is subjected to phenol and salinity orientated culture in an SBR (sequencing batch reactor), the activated sludge is used for treating the high-salinity phenol-containing wastewater. The excess sludge in the biological treatment stage for the wastewater in the petrochemical plant is recycled, and bacterial genera and an orientated culture method which are different from the prior art are adopted.

Description

technical field [0001] The invention relates to the technology in the field of waste water treatment by biological methods, and more specifically relates to an activated sludge for treating high-salt phenol-containing waste water. Background technique [0002] At present, the annual discharge of high-salt organic wastewater in my country is huge and diverse, and has become a typical source of industrial pollution. The generation of high-salt wastewater mainly includes the sewage generated by the development of seawater desalination and seawater substitution in coastal areas, as well as the high-salt wastewater produced by industrial enterprises, such as oil exploration and refining industries, fine and pharmaceutical chemical industries, paper industry, leather industry and food The pickling industry will produce a large amount of high-salt organic wastewater. Phenol-containing wastewater is one of the most toxic and harmful wastewater to be treated in water pollution preve...

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Problems solved by technology

[0003] Existing treatment methods for high-saline organic wastewater are inefficient and costly

The traditional view is that high salinity has an inhibitory effect on biological processes. If biochemical methods are used to treat high-salt organic wastewater, a large amount of wastewater must be diluted first, which not only wastes water resources, but also greatly increases wastewater treatment costs and engineering investment. Although the method of treating high-salt wastewater has certain practical effects, there are still many shortcomings, such as the multi-effect evaporator needs to consume a lot of energy, the desalination effect of the coagulation and flocculation process is not good, the ion exchange resin is easy to clog and the regeneration cost is high, and the membrane High technical treatment costs and need microfiltration pretreatment, etc.

[0004] The prior art discloses a variety of methods for microorganisms to degrade phenol-containing wastewater. For example, the application number is CN201020579938.0 and the title of the invention is "treatment device for treating high-concentration phenol-containing wastewater", which discloses the use of anaerobic-aerobic coupling to treat phenol-containing wastewater. The method of phenol wastewater, but this method can not be used for a kind of deep dehydration conditioning of sludge, because it cannot guarantee that microorganisms still maintain degradation activity under high-salt conditions; the invention title of application number is CN200610012071. Oxygen-coupled biological fluidized bed treatment method for phenol-containing wastewater", which discloses that an environment in which aerobic organisms and anaerobic organisms live is provided simultaneously in a biological fluidized bed, and substances between the two environments can be exchanged by diffusion, In this way, the coupling of anaerobic biodegradation and aerobic biodegradation to the degradation of phenol-containing wastewater is realized, but this method cannot be used for the treatment of high-salt and phenol-containing wastewater at the same time, because it cannot guarantee that the microorganisms still maintain degradation activity under high-salt conditions

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