CN102153240B - Method for treating waste water from production of metronidazole - Google Patents
Method for treating waste water from production of metronidazole Download PDFInfo
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- CN102153240B CN102153240B CN2011101029874A CN201110102987A CN102153240B CN 102153240 B CN102153240 B CN 102153240B CN 2011101029874 A CN2011101029874 A CN 2011101029874A CN 201110102987 A CN201110102987 A CN 201110102987A CN 102153240 B CN102153240 B CN 102153240B
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Abstract
The invention relates to a method for treating waste water from production of metronidazole. The steps of the method are as follows: adding alkali in metronidazole process waste water to adjust pH value and after evaporation, sending the metronidazole process waste water to a waste water adjusting tank; allowing imidazole process waste water and nitration process waste water to enter the waste water adjusting tank respectively through a grating; after mixture as well as water-quality and water-quantity adjustment by the waste water adjusting tank, sending the imidazole process waste water and the nitration process waste water to an electrolyzer for electrochemical catalysis water treatment; adding lime milk in the effluent of the electrolyzer to adjust pH value, sequentially removing ammonia-nitrogen by a neutralization aeration tank, adding flocculant, separating by a coagulative precipitation tank, and allowing supernatant water to enter a facultative tank for anaerobic degradation; and conducting oxic degradation by a biomembrane aeration tank and precipitation by a secondary precipitation tank on the effluent of the facultative tank for standardized discharge. Adopting a electrochemical catalysis water treatment technology for pretreating waste water, the method effectively eliminates the biotoxicity of the waste water, lowers the pollutant concentration of the waste water and greatly improves the biodegradability of the waste water, thus laying foundation for standardized biochemical treatment. The method is simple in technology and convenient in operation.
Description
Technical field
The present invention relates to the production wastewater treatment method, particularly is a kind of metronidazole production wastewater treatment method.
Background technology
Metronidazole has been widely used in clinical as killing one of main medicine of anerobes.But contain the toxic substance that suppresses microorganism growth even killing microorganisms in the metronidazole factory effluent, also contain salts such as sodium formiate and sodium sulfate, complicated component, organic concentration and salt concn are all high, bio-toxicity is big, its biodegradability extreme difference.Existing metronidazole production wastewater treatment method mainly contains catalytic oxidation, internal electrolysis and thin up microbiological treatment.
Catalytic oxidation is under catalyst action, and the organism in the waste water is by the strong oxidizer oxygenolysis, and the two bond ruptures in the organic constitution are oxidized to small molecules by macromole, and small molecules further is oxidized to carbonic acid gas and water, eliminates the bio-toxicity of waste water, makes COD
CrDescend BOD significantly
5/ COD
CrValue improves, and improves the biodegradability of waste water.But this method facility investment is big, processing cost is high.
Internal electrolysis is to utilize iron and charcoal component formation micro cell in the iron filings; With the sewage that charges into is electrolyte solution, in the slant acidity environment, organic pollutant is implemented reduction reaction; To remove part colourity, partial organic substances in the waste water, improve the biodegradability ability of waste water.This method processing cost is low, but restricted application, and have engineering defect such as iron carbon slab knot, generation channel, equipment move freely, operational difficulty.
The thin up microbiological treatment can only reduce Pollutant levels and can not change the character of pollutent, goes back waste water resource.
Therefore, design very necessity of a kind of technology metronidazole production wastewater treatment method simple, easy and simple to handle.
Summary of the invention
The purpose of this invention is to provide a kind of technology metronidazole production wastewater treatment method simple, easy and simple to handle.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of metronidazole production wastewater treatment method, its step is following:
A. the waste water of metronidazole operation adds the adjusting PH with base value to 7.5-8.0, with being pumped into evaporation unit, behind removal salinity, high boiling material and the residue, gets into wastewater equalization pond;
B. the waste water of imidazoles operation and nitrated operation gets into wastewater equalization pond after separating, scum through grid respectively;
C. mix through wastewater equalization pond, and after regulating water quality, the water yield, send into electrolyzer and carry out the electrochemical catalysis water treatment;
D. the water outlet of electrolyzer adds milk of lime and regulates the pH value to 8.5-9.0, and in the entering and aeration tank is with the air compressor machine deamination-nitrogen of blowing;
After flocculation agent is added in the water outlet of e. and aeration tank, get into coagulative precipitation tank and carry out precipitate and separate;
F. the supernatant water of coagulative precipitation tank entering oxygen compatibility pool carries out the anoxic degraded;
G. aerobic degradation is carried out in oxygen compatibility pool water outlet entering biofilm aeration pond;
H. the water outlet of biofilm aeration pond gets into the second pond deposition;
I. the primary water qualified discharge of second pond.
Further, said electrochemical catalysis water treatment is population electrochemical catalysis water treatment device and the electrolysis of pulse electrochemical catalysis water treatment device two-stage.
Further, saidly be evaporated to triple effect evaporation.
Compared with prior art; The present invention adopts the electrochemical catalysis water technology that the metronidazole factory effluent is carried out pre-treatment; Through electrochemistry direct oxidation-reduction and indirect oxidation-reduction, the different organic molecule of structure is implemented the oxygenolysis of non-selectivity or the modification of reducing, make open loop, scission of link, degraded, modifications such as ring texture, painted group and sterilization component; Eliminated the bio-toxicity of waste water effectively; Reduced the Pollutant levels of waste water, increased substantially the biodegradability of waste water, thereby laid a good foundation for the biochemical treatment qualified discharge.Technology of the present invention is simple, easy and simple to handle.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is made further detailed description, but this embodiment should not be construed as limitation of the present invention.
Embodiment 1
A kind of metronidazole production wastewater treatment method, its step is following:
A. the waste water of metronidazole operation adds the adjusting PH with base value to 7.5-8.0, with being pumped into evaporation unit, behind removal salinity, high boiling material and the residue, gets into wastewater equalization pond;
B. the waste water of imidazoles operation and nitrated operation gets into wastewater equalization pond after separating, scum through grid respectively;
C. mix through wastewater equalization pond, and after regulating water quality, the water yield, send into electrolyzer and carry out the electrochemical catalysis water treatment;
D. the water outlet of electrolyzer adds milk of lime and regulates the pH value to 8.5-9.0, and in the entering and aeration tank is with the air compressor machine deamination-nitrogen of blowing;
After flocculation agent is added in the water outlet of e. and aeration tank, get into coagulative precipitation tank and carry out precipitate and separate;
F. the supernatant water of coagulative precipitation tank entering oxygen compatibility pool carries out the anoxic degraded;
G. aerobic degradation is carried out in oxygen compatibility pool water outlet entering biofilm aeration pond;
H. the water outlet of biofilm aeration pond gets into the second pond deposition;
I. the primary water qualified discharge of second pond.
Embodiment 2
In the scheme of embodiment 1 record, said electrochemical catalysis water treatment is population electrochemical catalysis water treatment device and the electrolysis of pulse electrochemical catalysis water treatment device two-stage.
Embodiment 3
In the scheme of embodiment 1 record, saidly be evaporated to triple effect evaporation.
Embodiment 4
A kind of metronidazole production wastewater treatment method, its step is following:
The waste water of metronidazole operation adds adjusting PH with base value to 7.8 ± 0.2 earlier; Send into the triple effect evaporation system with sump pump again; Tell residue at the bottom of at the bottom of telling sodium sulfate, 2nd effect evaporator still at the bottom of the 1st effective evaporator still, continue dividing salt, triple-effect evaporator still, the steam of cat head cause water jet pump with water outlet to wastewater equalization pond;
The waste water of imidazoles operation and nitrated operation flows into wastewater equalization pond after separating, scum through grid respectively;
Very poor through the mixed wastewater biochemical property of wastewater equalization pond, BOD
5/ COD
CrBe about 0.1, after adjusting water quality, the water yield, send into population electrochemical catalysis water treatment device and carry out first step electrolysis;
The water outlet of population electrochemical catalysis water treatment device flows into pulse electrochemical catalysis water treatment device and carries out second stage electrolysis;
The BOD of pulse electrochemical catalysis water treatment device water outlet
5/ COD
CrReach 0.37-0.48, the existing effect of bio-toxicity removed, and after adding milk of lime and regulating pH value to 8.8 ± 0.2, in the entering and aeration tank is with the air compressor machine deamination-nitrogen of blowing;
In add Poly aluminum Chloride (PAC) (PAC) with the water outlet of aeration tank after, get into coagulative precipitation tank and carry out precipitate and separate;
The supernatant water of coagulative precipitation tank gets into oxygen compatibility pool and carries out the anoxic degraded;
The oxygen compatibility pool water outlet gets into the biofilm aeration pond and carries out aerobic degradation;
The water outlet of biofilm aeration pond gets into the second pond deposition;
The primary water qualified discharge of second pond.
Make the content of detailed description in this specification sheets, belong to the those skilled in the art known prior art.
Claims (3)
1. metronidazole production wastewater treatment method, its step is following:
A. the waste water of metronidazole operation adds the adjusting PH with base value to 7.5-8.0, with being pumped into evaporation unit, behind removal salinity, high boiling material and the residue, gets into wastewater equalization pond;
B. the waste water of imidazoles operation and nitrated operation gets into wastewater equalization pond after separating, scum through grid respectively;
C. mix through wastewater equalization pond, and after regulating water quality, the water yield, send into electrolyzer and carry out the electrochemical catalysis water treatment;
D. the water outlet of electrolyzer adds milk of lime and regulates the pH value to 8.5-9.0, and in the entering and aeration tank is with the air compressor machine deamination-nitrogen of blowing;
After flocculation agent is added in the water outlet of e. and aeration tank, get into coagulative precipitation tank and carry out precipitate and separate;
F. the supernatant water of coagulative precipitation tank entering oxygen compatibility pool carries out the anoxic degraded;
G. aerobic degradation is carried out in oxygen compatibility pool water outlet entering biofilm aeration pond;
H. the water outlet of biofilm aeration pond gets into the second pond deposition;
I. the primary water qualified discharge of second pond.
2. metronidazole production wastewater treatment method according to claim 1 is characterized in that: said electrochemical catalysis water treatment is population electrochemical catalysis water treatment device and the electrolysis of pulse electrochemical catalysis water treatment device two-stage.
3. metronidazole production wastewater treatment method according to claim 1 and 2 is characterized in that: saidly be evaporated to triple effect evaporation.
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| CN2011101029874A CN102153240B (en) | 2011-04-25 | 2011-04-25 | Method for treating waste water from production of metronidazole |
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| CN2011101029874A CN102153240B (en) | 2011-04-25 | 2011-04-25 | Method for treating waste water from production of metronidazole |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102863105B (en) * | 2012-09-12 | 2013-09-11 | 浙江工商大学 | Technology and system for treating high-salt high-nitrogen high-organic matter chemical wastewater |
| CN102976560A (en) * | 2012-12-11 | 2013-03-20 | 常州大学 | Process for treating sulfamide-containing pharmaceutical wastewater |
| CN103408082B (en) * | 2013-08-10 | 2014-12-03 | 黄冈师范学院 | Recovery method and device for formic acid solvent during metronidazole production |
| CN107585953A (en) * | 2017-09-15 | 2018-01-16 | 湖北省宏源药业科技股份有限公司 | A kind of benzoic methyl nitroazole method of wastewater treatment |
| CN110171902B (en) * | 2018-05-04 | 2022-01-11 | 武汉武药制药有限公司 | Comprehensive treatment method of metronidazole wastewater |
| CN110143717A (en) * | 2019-04-30 | 2019-08-20 | 贵州民族大学 | A kind of integrated processing system of house refuse |
| CN116606021B (en) * | 2023-06-09 | 2023-11-14 | 威海蓝创环保设备有限公司 | Metronidazole waste water treatment system |
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| CN101857295B (en) * | 2010-05-19 | 2012-06-20 | 华南师范大学 | Method for quickly removing metronidazole by utilizing nanoscale zero-valent iron and application thereof |
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Application publication date: 20110817 Assignee: Huanggang Yinhe Aarti Pharmaceutical Co.,Ltd. Assignor: Wuhan Weimeng Chemical Mechine Co., Ltd. Contract record no.: 2014420000122 Denomination of invention: Method for treating waste water from production of metronidazole Granted publication date: 20120704 License type: Exclusive License Record date: 20140627 |
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