Process method for treating dehydroacetic acid mixed wastewater, and application thereof

Abstract

The invention discloses a process method for treating dehydroacetic acid mixed wastewater. The method comprises: preparing a compound bacterial agent, wherein pseudomonas, acinetobacter and bacillus are cultured and fermented respectively, fermentation broths obtained through fermentation are adsorbed to prepare bacterial powders, and the bacterial powders are mixed according to the mass ratio of20%-30% of pseudomonas, 10%-30% of acinetobacter and 40%-70% of bacillus to form a compound bacterial agent; pre-treating wastewater, wherein wastewater enters an adjusting tank and is diluted to adjust the COD of the wastewater to 1300-1700 mg / L and the pH value to 6.5-7.0; and mixing the dehydroacetic acid wastewater, a biological synergistic nutritional agent and water according to a ratio of (1-2):(1-2):(6-8) to form mixed water, adding a composite strain into the mixed water, mixing and activating at 20-35 DEG C by controlling DO at 1-6 mg / L in an aeration manner and the pH value at 6-9,and reacting for 5-50 hours to finish activation, wherein the mass ratio of the compound bacterial agent to the mixed water is (0.5-10):110. The invention also discloses an application of the method in treatment of dehydroacetic acid wastewater. According to the invention, the wastewater treatment efficiency can be improved, the wastewater treatment cost is reduced, and the COD removal rate is increased.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a treatment method for dehydroacetic acid wastewater. Background technique [0002] With the rapid development of the food industry, food additives have become an unavoidable problem in food safety. Dehydroacetic acid, as a new chemical preservative, was first used in the food industry as a food preservative in the United States in the 1950s, and it was used in Japan in the 1970s. In developed countries, the industrialized production of dehydroacetic acid has been formed, but our country started relatively late. [0003] Dehydroacetic acid is a very important organic synthesis intermediate and an excellent plasticizer. Since it was discovered in 1940 that it has antibacterial effects, it and some of its derivatives have been used as preservatives in many countries. At present, dehydroacetic acid and its related derivatives have been used for anti-mold and anti-corrosion of i...

AI Technical Summary

Problems solved by technology

[0004] Due to the inhibitory properties of dehydroacetic acid wastewater on microbial flora, the treatment of wastewater is more difficult and the treatment cost is too high

[0005] The microbial bacteria that degrade pollutants in the existing biochemical system are mainly microbial bacteria that play a broad-spectrum role in degrading COD, and cannot tolerate the toxicity of dehydroacetic acid in wastewater

When the dehydroacetic acid-containing wastewater enters the system, it will cause sludge collapsing, a decrease in the number of effective bacteria, a decrease in the efficiency of wastewater treatment, or even no effect, and instability of the biochemical treatment system.