Pre-treatment method prior to biochemical treatment of sewage containing quaternary ammonium salt

A biochemical treatment and sewage treatment technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of biochemical treatment system hazards, reduce the effect of sewage treatment, and not suitable for membrane electrolytic cells, etc., to reduce the load of biochemical treatment and simple process , enhance the effect of sewage treatment

Inactive Publication Date: 2014-01-01
SHANDONG PAINI CHEM
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Problems solved by technology

The existing brine purification technology is ineffective for removing quaternary ammonium salts in brine, so it is not suitable for the recovery of brine containing quaternary ammonium salts with membrane electrolysis cells
[0003] Sewage containing trace amounts of quaternary ammonium salts will cause harm to the biochemical treatment system, kill many sludge biological bacteria, and reduce the sewage treatment effect

Method used

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Embodiment

[0013] The generated sewage is sent to the sewage treatment tank, and the liquid level is controlled at 2 / 3. It can be processed at room temperature. First, start stirring, and slowly add about 3% bentonite from the feeding port. After the addition is complete, stir for another 30-60 minutes. Stirring was then stopped and allowed to stand for 1 hour. The clean water is released from the water outlet, pumped into the sewage biochemical treatment system for further treatment. The flocs are discharged from the thick stock outlet to the thick stock collection tank for centralized packaging.

[0014] Almost all the quaternary ammonium salts contained in the sewage treated by this method are separated, thereby greatly reducing the load of biochemical treatment, greatly improving the sewage treatment effect, and effectively protecting the sludge biological bacteria. However, traditional treatment methods not only deal with unclean quaternary ammonium salts, but also cause new pol...

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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 quaternary ammonium salt. The pre-treatment method adopt sewage containing the quaternary ammonium 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; adding bentonite into the kettle from a feed opening; 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 flocculus from the bottom of the kettle. The technology is simple, greatly relieves the load of the follow-up biochemical treatment by separating the quaternary ammonium salt from the sewage, so that sludge biological germ is protected, and 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 method for pretreatment of sewage containing quaternary ammonium salts before biochemical treatment. (2) Background technology [0002] Many processes used to make polymers, plastics, and other chemicals produce by-product ophthalmic solutions and, in some cases, by-product saline solutions that contain one or more quaternary ammonium salts as impurities. Existing brine purification technology is ineffective for removing quaternary ammonium salts in brine, so it is not suitable for using membrane electrolytic cells to recover brine containing quaternary ammonium salts. [0003] Sewage containing trace amounts of quaternary ammonium salts will cause harm to the biochemical treatment system, kill many sludge biological bacteria, and reduce the sewage treatment effect. (3) Contents of the invention [0004] In order to make up for the deficiencies of the pr...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 曲保伦卢学杰
Owner SHANDONG PAINI CHEM
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