A pretreatment method before biochemical treatment of wastewater containing water-soluble fatty acid salts

Abstract

The invention relates to the technical field of sewage treatment, and in particular to a pre-treatment method prior to a biochemical treatment of sewage containing a water-soluble fatty acid salt. The pre-treatment method adopt sewage containing the water-soluble fatty acid salt as a raw material, and is characterized by comprising the following steps: pumping the sewage into a sewage treatment kettle; starting up a built-in mixing device in the kettle; dropping cation into the kettle from an elevated tank; mixing and standing; discharging out of the kettle from an outlet in the upper end a liquor, which is then pumped into the a biochemical treatment system for further treatment, and discharging the sediment from the bottom of the kettle. The technology is simple, greatly relieves the load of the follow-up biochemical treatment by reducing the COD content to 1% of the original value, so that problem of waste water containing organic salt is solved, meanwhile, the by-product can be sold as a product to increase the income.

Description

(1) Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a pretreatment method for water-soluble fatty acid salt-containing sewage before biochemical treatment. (2) Background technology [0002] At present, there are many chemical companies in China. In the production process of such enterprises, a large amount of waste water containing fatty amines and fatty acids will be produced. This type of waste water belongs to high-concentration organic sewage, and its main pollutants are COD and ammonia nitrogen. The surrounding environment of the enterprise and the development of the enterprise have a great impact. [0003] At present, the domestic methods for treating such wastewater are mainly physicochemical and biochemical treatment methods, which are divided into many types, but all have problems such as high treatment costs to varying degrees, and difficulty in removing high ammonia nitrogen, which makes the effluent diffi...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many chemical companies in China. In the production process of such enterprises, a large amount of wastewater containing fatty amines and fatty acids will be produced. This type of wastewater belongs to high-concentration organic wastewater, and its main pollutants are COD and ammonia nitrogen. The surrounding environment of the enterprise and the development of the enterprise have a great impact

[0003] The current domestic treatment methods for this type of wastewater are mainly physicochemical and biochemical treatment methods, which are divided into many types, but they all have problems such as high treatment costs to varying degrees, high ammonia nitrogen is difficult to remove, and the effluent is difficult to meet the standard.