Method for treating yeast wastewater

Abstract

The invention discloses a method for treating yeast wastewater. The treatment method comprises the following steps: firstly, performing coagulative precipitation pretreatment on wastewater; secondly, performing anaerobic treatment on the pretreated wastewater; thirdly, performing aerobic treatment on the wastewater after the anaerobic treatment; and finally, performing advanced oxidation treatment on the wastewater after the aerobic treatment by a Fenton advanced oxidation method and air floatation. The treatment method has the advantages of simple operation, low treatment expense, high biochemical efficiency, guarantee of up-to-standard water by advanced treatment and the like.

Description

technical field

[0001] The invention relates to a wastewater treatment method, in particular to a yeast wastewater treatment method. technical background

[0002] The wastewater discharged during yeast production is one of the most polluted and difficult industrial wastewaters. Its high-concentration wastewater mainly comes from the wastewater discharged from centrifugal separation and filtration devices in the yeast fermentation process. The main components are yeast protein, cellulose, colloidal substances, and nutrients in waste molasses that have not been fully utilized, such as residual sugar, etc. Many of them are It is difficult to degrade; in addition to the high concentration of organic matter, the caramel compound in the yeast wastewater makes the color of the yeast wastewater darker, which is dark brown; at the same time, the yeast wastewater also contains microbial metabolites, inorganic salts, and sulfate radicals during the fermentation process. The concentrat...

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