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Treatment method of waste liquor obtained after alcohol mother liquor purifying in doxycycline hydrochloride production

A doxycycline hydrochloride and treatment method technology, applied in biological water/sewage treatment, neutralized water/sewage treatment, filtration treatment, etc., can solve problems such as difficult treatment, achieve thorough treatment, high treatment efficiency, and eliminate pollution Effect

Inactive Publication Date: 2015-03-25
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of this kind of waste liquid, it is very difficult to treat. There are not many research results published in the public domain, and there is no suitable treatment process that can make it meet the discharge standards after treatment.

Method used

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  • Treatment method of waste liquor obtained after alcohol mother liquor purifying in doxycycline hydrochloride production

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] A method for treating waste liquid after purification of ethanol mother liquor in the production of doxycycline hydrochloride, comprising the following steps: (1) Cooling: the waste liquid is homogenized in water quality and quantity in a regulating tank and stirred, so that the water temperature is naturally cooled from 90°C to 40°C; (2) One-time flocculation precipitation: the waste liquid in step (1) is pumped to the flocculation reaction tank, and the flocculant polyaluminum chloride is added to the waste water through a metering pump, and the dosage is 1000mg / L , After the flocculation and sedimentation of the supernatant after the separation of the mud and water, add quicklime for neutralization. The amount of quicklime is 8g / L. The quicklime and the supernatant obtained by the first flocculation and precipitation are neutralized, so that the pH value of the wastewater is Adjust from 0.5 to 6.5 to precipitate the dissolved salts in the waste water and preliminarily...

Embodiment 2

[0025] A method for treating waste liquid after purification of ethanol mother liquor in the production of doxycycline hydrochloride, comprising the following steps: (1) Cooling: the waste liquid is homogenized in water quality and quantity in a regulating tank and stirred, so that the water temperature is naturally cooled from 90°C to 42°C; (2) Primary flocculation precipitation: the waste liquid in step (1) is pumped to the flocculation reaction tank, and the flocculant polyaluminum chloride is added to the waste water through a metering pump, and the dosage is 2500mg / L , After the flocculation and sedimentation of the supernatant after the separation of the mud and water, add quicklime for neutralization. The amount of quicklime is 8g / L. The quicklime and the supernatant obtained by the first flocculation and precipitation are neutralized, so that the pH value of the wastewater is Adjust from 0.7 to 6.9 to precipitate the dissolved salts in the waste water and preliminarily ...

Embodiment 3

[0031]A method for treating waste liquid after purification of ethanol mother liquor in the production of doxycycline hydrochloride, comprising the following steps: (1) Cooling: the waste liquid is homogenized in water quality and quantity in a regulating tank and stirred, so that the water temperature is naturally cooled from 90°C to 44°C; (2) One-time flocculation and precipitation: the waste liquid in step (1) is pumped to the flocculation reaction tank, and the flocculant polyaluminum chloride is added to the waste water through a metering pump, and the dosage is 1500mg / L , After the flocculation and sedimentation of the supernatant after the separation of the mud and water, add quicklime for neutralization. The amount of quicklime is 8g / L. The quicklime and the supernatant obtained by the first flocculation and precipitation are neutralized, so that the pH value of the wastewater is Adjust from 0.8 to 7.0 to precipitate the dissolved salts in the waste water and preliminar...

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Abstract

The invention discloses a treatment method of waste liquor obtained after alcohol mother liquor purifying in doxycycline hydrochloride production. The treatment method comprises the following steps: (1) cooling: stirring and cooling the waste liquor to 40-45 DEG C in a regulating reservoir; (2) performing primary flocculation and sedimentation: adding a flocculating agent into cooled wastewater, and adding alkaline to neutralize after performing the flocculation and sedimentation, and mud-water separation; (3) performing secondary flocculation and sedimentation: performing filter-pressing on the liquid neutralized in the step (2) by virtue of a filter press, performing flocculation and sedimentation on filtrate again, and separating mud from water; (4) performing biochemical treatment: performing biochemical reaction on liquid supernatant obtained by mud-water separation through an ozone oxidation decoloration unit, an anaerobic treatment unit and an aerobic biochemical unit; (5) filtering and performing membrane separation: treating the liquid treated in the step (4) through a membrane bioreactor, a nanofiltration membrane and a reverse osmosis membrane. Compared with the prior art, the treatment method has the beneficial effects of high treatment efficiency, stable operation and capacity of eliminating the pollution of wastewater on the environment.

Description

technical field [0001] The invention relates to a method for treating waste liquid in the chemical production process, in particular to a method for treating waste liquid after purification of ethanol mother liquor in the production of acid doxycycline. Background technique [0002] Doxycycline hydrochloride is a broad-spectrum antibiotic made from oxytetracycline as raw material through multi-step chemical reactions of chlorination, dehydration, hydrogenation into salt, and replacement, followed by purification, decolorization, filtration, crystallization, and drying. There are many kinds of raw materials for its production, and the process is complicated. Ethanol is an important raw material of this product, and a large amount of waste water containing ethanol will be discharged during the production process. In the process of distillation and recovery of ethanol in wastewater, a large amount of purified waste liquid cannot be processed. The chemical oxygen demand (COD) o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/36
CPCC02F1/001C02F1/441C02F1/442C02F1/5236C02F1/66C02F1/78C02F3/02C02F3/1268C02F3/28C02F9/00C02F2103/36C02F2301/08
Inventor 龚为进武猛刘玥窦艳艳段学军刘海芳吕晶晶
Owner ZHONGYUAN ENGINEERING COLLEGE
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