Treatment method of acetic acid absorption tower wastewater

Abstract

The invention provides a treatment method of acetic acid absorption tower wastewater, and belongs to the technical field of wastewater treatment. The treatment method of acetic acid absorption tower wastewater comprises the following steps: carrying out aeration treatment on sewage treatment aerobic process denitrification wastewater to obtain ammonia nitrogen removed wastewater; and mixing the ammonia nitrogen removed wastewater with acetic acid absorption tower wastewater, and then carrying out denitrification treatment. According to the present invention, based on the existing sewage treatment aerobic process denitrification wastewater, the acetic acid absorption tower wastewater is adopted as a carbon source for denitrification treatment, such that the kinetic energy required by the subsequent pH value adjustment and the consumption of the raw material and the auxiliary material do not need to be increased so as to reduce the treatment cost and save the energy consumption so as to meet the denitrification treatment (nitrate nitrogen degradation) process conditions.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating wastewater from an acetic acid absorption tower. Background technique [0002] Acetic acid is used as an acidity regulator, acidulant, pickling agent, flavor enhancer, spice, etc. It is also a good antimicrobial agent, mainly due to its ability to lower the pH value below that required for optimal growth of microorganisms pH. Acetic acid is also a sour agent, mainly used in compound seasoning, wax preparation, canned food, cheese, jelly and so on. When used in seasonings, acetic acid can be diluted with water to a 4-5 wt% solution, and then added to various seasonings for application. [0003] During the production process of acetic acid, the waste water produced after tail gas absorption is acidic high-concentration waste water containing acetic acid. At present, the treatment of acetic acid wastewater is still a big problem. [0004] Devel...

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Problems solved by technology

At present, there is no technology that can solve the problem of the entire concentration range. The traditional separation method is to control the temperature of the wastewater with an acetic acid concentration of 10-15wt% produced during the production process below 40°C, and pass it through a bag filter and then under the action of the raw water pump. After the hollow fiber ultrafiltration membrane is filtered, the suspended solids and precipitates are removed, and then the obtained acetic acid wastewater is pressurized and concentrated repeatedly with the anti-pollution nanofiltration membrane to further recover the acetic acid in the wastewater, so that the concentration of acetic acid in the final discharged concentrated solution Reach 40wt%, the obtained concentrated solution is purified through rectification, and the gained acetic acid is reclaimed and used (referring to CN102875352A), and the existing treatment method has the problem of high treatment cost

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