CN115072946A - Method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater - Google Patents
Method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C01C1/022—Preparation of aqueous ammonia solutions, i.e. ammonia water
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- C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
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Abstract
The application provides a method for extracting ammonia gas from gentamicin fermentation wastewater to prepare high-concentration ammonia water, which comprises the steps of firstly carrying out solid-liquid filtration separation on the gentamicin fermentation wastewater, then feeding the wastewater into a hydrolysis biochemical system containing hydrolytic bacteria for hydrolysis, converting organic ammonia nitrogen into ammonium salt ammonia nitrogen, then feeding the wastewater into a blending system, adjusting the pH value to 11-12 by using NaOH, converting the ammonium salt ammonia nitrogen in the wastewater into free ammonia nitrogen, then feeding the wastewater into a negative pressure distillation system, converting the free ammonia nitrogen into ammonia gas in a negative pressure distillation mode, then feeding the ammonia gas into an ammonia absorption system, dissolving the ammonia gas in purified water to obtain ammonia water, and finally conveying the ammonia water into an ammonia water storage tank; the concentration of the recovered ammonia water can reach 20wt%, the ammonia water can be recycled, the problem of wastewater denitrification is solved, secondary pollution is avoided, the total nitrogen removal rate can reach more than 90%, and the residual liquid after ammonia evaporation enters a sewage biochemical treatment system to complete denitrification without adding a carbon source.
Description
Technical Field
The invention belongs to the technical field of biological pharmaceutical wastewater treatment, and particularly relates to a method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater.
Background
Gentamicin belongs to fermentation antibiotics, starch, corn flour and the like in a culture medium used in the fermentation process provide a carbon source for the growth of microorganisms, bean cake powder, peptone, ammonium sulfate and the like in the culture medium provide a nitrogen source for the growth of the microorganisms, and inorganic salts such as potassium dihydrogen phosphate and the like provide trace elements for the growth of the microorganisms. In the fermentation process, microorganisms cannot metabolize and use up all the culture medium, so that a large amount of organic nitrogen and part of inorganic nitrogen are remained in the fermentation liquor after the titer is extracted, and therefore, the gentamicin fermentation wastewater is wastewater with high nitrogen-containing pollutants (the total nitrogen is about 700 mg/L).
The nitrogen-containing pollutants in the wastewater mainly exist in the forms of organic nitrogen and inorganic nitrogen; the organic nitrogen mainly comprises nitrogen-containing organic matters such as urea, amino acid, protein, nucleic acid, uric acid, fatty amine, organic alkali, amino sugar and the like, wherein the urea and the protein mainly exist in the form of soluble organic nitrogen and can be converted into ammonia nitrogen through ammoniation and the like (the organic nitrogen in the gentamicin fermentation wastewater accounts for 70 percent of the total nitrogen and is mainly soluble organic nitrogen); the inorganic nitrogen comprises ammonia nitrogen and nitrate nitrogen, and the ammonia nitrogen comprises free ammonia nitrogen NH 3 N and ammonium Nitrogen NH 4 + -N (ammonia nitrogen in gentamicin fermentation wastewater accounts for 20% of total nitrogen, mainly ammonium salt nitrogen); nitrate nitrogen including nitrate nitrogen NO 3 -N and nitrite Nitrogen NO 2 N (nitrate nitrogen in gentamicin fermentation wastewater accounts for 10% of the total nitrogen, wherein nitrate nitrogen and nitrite nitrogen account for about half of the total nitrogen).
In recent years, with the development of economy, more and more nitrogen-containing pollutants are randomly discharged to cause great harm to the environment. A large amount of wastewater containing nitrogen pollutants is discharged into a water body, thereby not only causing eutrophication of the water body and causing black and odorous water body, but also increasing the difficulty and cost of water treatment and even generating toxic action on human beings and other organisms. At present, gentamicin fermentation wastewater is generally treated by adopting a combined biochemical technical method of anaerobic → anoxic → aerobic → precipitation and the like, the operation of a biochemical system is unstable due to the unbalance of the carbon-nitrogen ratio for supplying energy to microorganisms in the wastewater, and in addition, the carbon-nitrogen ratio for supplying energy to the microorganisms in the wastewater is also unbalanced, so a large amount of carbon sources are added to provide guarantee for the microorganisms in the treatment process, the secondary pollution condition exists, and the operation cost is higher.
Disclosure of Invention
The invention aims to provide a method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater comprises the following steps of:
1) carrying out solid-liquid filtration separation on gentamicin fermentation wastewater containing mycelia of zymophytes, and separating and intercepting the mycelia to obtain a filtrate;
2) adding the filtrate obtained in the step 1) into a hydrolysis biochemical system containing hydrolytic bacteria for hydrolysis treatment, and converting organic ammonia nitrogen into ammonium salt ammonia nitrogen through the hydrolysis treatment;
3) adding the wastewater obtained in the step 2) into a blending system, and adjusting the pH of the wastewater to be alkaline by using NaOH so as to convert ammonium salt ammonia nitrogen into free ammonia nitrogen;
4) adding the wastewater obtained in the step 3) into an ammonia distillation system for negative pressure distillation, and evaporating free ammonia nitrogen from the wastewater;
5) dissolving the free ammonia nitrogen obtained in the step 4) in purified water to prepare ammonia water;
6) conveying the ammonia water obtained in the step 5) to an ammonia water storage tank for storage.
Preferably, in the step 1), solid-liquid filtration and separation are performed by using plate-and-frame solid-liquid filtration and separation;
the mycelium in the filtrate after solid-liquid filtration and separation is less than or equal to 200 mg/L.
Preferably, in the step 2), the hydrolysis retention time is controlled to be 96h-110h, so that more than 90% of organic ammonia nitrogen is converted into ammonium salt ammonia nitrogen.
Preferably, in the step 3), the pH value of the wastewater is adjusted to 11-12 by using 30 mass percent NaOH.
Preferably, in the step 4), the residual liquid after the negative pressure distillation is sent to a sewage biochemical treatment system for subsequent wastewater treatment.
Preferably, in step 5), 20% by mass of aqueous ammonia is prepared.
The application provides a method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater, which comprises the steps of firstly carrying out solid-liquid filtration separation on the gentamicin fermentation wastewater, effectively intercepting solid suspended matters, then feeding the wastewater into a hydrolysis biochemical system containing hydrolytic bacteria for hydrolysis, converting more than 90% of organic ammonia nitrogen into ammonium salt ammonia nitrogen by controlling hydrolysis time, then feeding the organic ammonia nitrogen into a blending system, adjusting the pH to 11-12 by using 30% of NaOH, converting the ammonium salt ammonia nitrogen in the wastewater into free ammonia nitrogen, then feeding the free ammonia nitrogen into a negative pressure distillation system, converting the free ammonia nitrogen into ammonia gas by a negative pressure distillation mode, feeding the ammonia gas into an ammonia absorption system, dissolving the ammonia gas into purified water to obtain ammonia water, and finally conveying the ammonia water into an ammonia water storage tank;
the concentration of the ammonia water recovered by the method can reach 20wt%, and the ammonia water can be recycled; in addition, the problem of denitrification of the wastewater is solved while the resource utilization is realized, secondary pollution is not generated in the process, and the total nitrogen removal rate in the wastewater can reach more than 90 percent; meanwhile, the residual liquid after ammonia evaporation enters a sewage biochemical treatment system, and the aim of denitrification can be fulfilled without adding a carbon source.
Drawings
FIG. 1 is a graph showing the influence of the amount of hyphae in the filtrate in step 2) on the ammoniation rate (conversion of organic ammonia nitrogen into ammonium salt ammonia nitrogen);
FIG. 2 is a graph showing the influence of the hydrolysis retention time in step 2) on the ammoniation rate (conversion of organic ammonia nitrogen into ammonium salt ammonia nitrogen);
FIG. 3 is a bar graph showing the effect of pH adjustment range in step 3) on the conversion of ammonium salt ammonia nitrogen into free ammonia nitrogen.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The application provides a method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater, which comprises the following steps of:
1) carrying out solid-liquid filtration separation on gentamicin fermentation wastewater containing mycelia of zymophytes, and separating and intercepting the mycelia to obtain a filtrate;
2) adding the filtrate obtained in the step 1) into a hydrolysis biochemical system containing hydrolytic bacteria for hydrolysis treatment, and converting organic ammonia nitrogen into ammonium salt ammonia nitrogen through the hydrolysis treatment;
3) adding the wastewater obtained in the step 2) into a blending (blending) system, and adjusting the pH of the wastewater to be alkaline by using NaOH to convert ammonium salt ammonia nitrogen into free ammonia nitrogen;
4) adding the wastewater obtained in the step 3) into an ammonia distillation system for negative pressure distillation, and evaporating free ammonia nitrogen from the wastewater;
5) dissolving the free ammonia nitrogen obtained in the step 4) in purified water to prepare ammonia water;
6) conveying the ammonia water obtained in the step 5) to an ammonia water storage tank for storage.
In one embodiment of the application, in the step 1), the solid-liquid filtration separation uses plate-and-frame solid-liquid filtration separation;
the mycelium in the filtrate after solid-liquid filtration and separation is less than or equal to 200 mg/L.
In one embodiment of the application, in the step 2), the hydrolysis retention time is controlled to be 96h-110h, so that more than 90% of organic ammonia nitrogen is converted into ammonium salt ammonia nitrogen.
In one embodiment of the application, in step 3), the pH of the wastewater is adjusted to 11-12 with NaOH in a mass percentage of 30%.
In one embodiment of the application, in the step 4), the residual liquid after the negative pressure distillation is sent to a sewage biochemical treatment system for subsequent wastewater treatment.
In one embodiment of the present application, in step 5), 20% by mass of aqueous ammonia is prepared.
In the present application, the sewage biochemical treatment system is preferably a biofilm method treatment system.
Methods and devices not described in detail in the present invention are all the prior art and are not described in detail.
In order to further understand the present invention, the method for extracting ammonia gas from gentamicin fermentation wastewater to prepare high-concentration ammonia water provided by the present invention is described in detail with reference to the following examples, and the scope of the present invention is not limited by the following examples.
Example 1
The method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater comprises the following steps of:
1) carrying out solid-liquid filtration separation on gentamicin fermentation wastewater containing mycelia of zymophytes, and separating and intercepting the mycelia to obtain a filtrate;
in the step 1), solid-liquid filtration and separation are carried out by using plate-and-frame solid-liquid filtration and separation;
mycelium in the filtrate after solid-liquid filtration and separation is less than or equal to 200 mg/L;
2) adding the filtrate obtained in the step 1) into a hydrolysis biochemical system containing hydrolytic bacteria for hydrolysis treatment, and converting organic ammonia nitrogen into ammonium salt ammonia nitrogen through the hydrolysis treatment;
in the step 2), the hydrolysis retention time is controlled to be 98h, so that more than 90% of organic ammonia nitrogen is converted into ammonium salt ammonia nitrogen;
3) adding the wastewater obtained in the step 2) into a blending system, and adjusting the pH of the wastewater to be alkaline by using NaOH so as to convert ammonium salt ammonia nitrogen into free ammonia nitrogen;
in the step 3), the pH value of the wastewater is adjusted to 11-12 by using NaOH with the concentration of 30 percent;
4) adding the wastewater obtained in the step 3) into an ammonia distillation system for negative pressure distillation, and evaporating free ammonia nitrogen from the wastewater;
in the step 4), the residual liquid after negative pressure distillation is sent into a sewage biochemical treatment system for subsequent wastewater treatment;
5) dissolving the free ammonia nitrogen obtained in the step 4) in purified water to prepare ammonia water;
in the step 5), preparing ammonia water with the content of 20%;
6) conveying the ammonia water obtained in the step 5) to an ammonia water storage tank for storage.
Example 2
Experiment on influence of mycelium content in filtrate on ammoniation rate
Performing plate-and-frame solid-liquid filtration separation on the gentamicin fermentation wastewater containing mycelia of zymophytes, separating and intercepting the mycelia, wherein the residual mycelia in the obtained filtrate are respectively as follows: 0mg/L, 50mg/L, 100mg/L, 150mg/L, 200mg/L, 250mg/L, 300mg/L, 350mg/L and 400mg/L are respectively added into a hydrolysis biochemical system containing hydrolytic bacteria for hydrolysis, sampling is carried out after 96 hours, the total nitrogen and ammonia nitrogen values are monitored, and the ammoniation rate is calculated, wherein the result is shown in figure 1.
As shown in FIG. 1, when the amount of the residual hyphae in the filtrate was within 300mg/L, the ammoniation rate reached 90% or more, and when the amount of the residual hyphae in the filtrate exceeded 300mg/L, the ammoniation rate rapidly declined, and the ammoniation rate was less than 90%. Therefore, the residual mycelium content in the filtrate needs to be controlled to be less than or equal to 300mg/L, and the ammoniation rate can not be influenced to reach 90 percent or more.
Example 3
Experiment of influence of hydrolysis retention time on ammoniation rate
And adding the wastewater with the residual mycelium content of less than or equal to 300mg/L into a hydrolysis biochemical system containing hydrolytic bacteria for hydrolysis, sampling every 12 hours to detect total nitrogen and ammonia nitrogen, and calculating the ammoniation rate, wherein the result is shown in figure 2.
As shown in FIG. 2, the ammoniation rate gradually increased with the increase of the retention time, and reached more than 90% at 96 hours. Therefore, the ammonification rate can reach more than 90 percent only after the hydrolysis time reaches more than 96 hours.
Example 4
Experiment for influence of pH adjustment range on conversion from ammonium salt ammonia nitrogen to free ammonia nitrogen
The conversion rate was calculated by adjusting the pH of the wastewater to alkaline with 30% NaOH, pH8-9, pH9-10, pH10-11, pH11-12, pH12-13, respectively, and then measuring the ammonia nitrogen and ammonium ion values, and the results are shown in fig. 3.
As shown in figure 3, when the alkalinity is increased continuously, the conversion rate of ammonium salt ammonia nitrogen to free ammonia nitrogen is also improved obviously, and the pH is adjusted to 11-12, the conversion rate of ammonium salt ammonia nitrogen to free ammonia nitrogen reaches 98%. Therefore, the conversion rate from ammonium salt ammonia nitrogen to free ammonia nitrogen is suitable for the pH adjustment range of 11-12.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (6)
1. The method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater is characterized by comprising the following steps of:
1) carrying out solid-liquid filtration separation on gentamicin fermentation wastewater containing mycelia of zymophytes, and separating and intercepting the mycelia to obtain a filtrate;
2) adding the filtrate obtained in the step 1) into a hydrolysis biochemical system containing hydrolytic bacteria for hydrolysis treatment, and converting organic ammonia nitrogen into ammonium salt ammonia nitrogen through the hydrolysis treatment;
3) adding the wastewater obtained in the step 2) into a blending system, and adjusting the pH of the wastewater to be alkaline by using NaOH so as to convert ammonium salt ammonia nitrogen into free ammonia nitrogen;
4) adding the wastewater obtained in the step 3) into an ammonia distillation system for negative pressure distillation, and evaporating free ammonia nitrogen from the wastewater;
5) dissolving the free ammonia nitrogen obtained in the step 4) in purified water to prepare ammonia water;
6) conveying the ammonia water obtained in the step 5) to an ammonia water storage tank for storage.
2. The method for extracting ammonia gas from gentamicin fermentation wastewater to prepare high-concentration ammonia water according to claim 1, wherein in the step 1), solid-liquid filtration separation is performed by using plate-and-frame solid-liquid filtration separation;
the mycelium in the filtrate after solid-liquid filtration and separation is less than or equal to 200 mg/L.
3. The method for extracting ammonia gas from gentamicin fermentation wastewater to prepare high-concentration ammonia water as claimed in claim 1, wherein in step 2), the hydrolysis retention time is controlled to be 96h-110h, so as to convert more than 90% of organic ammonia nitrogen into ammonium salt ammonia nitrogen.
4. The method for extracting ammonia gas from gentamicin fermentation wastewater to prepare high-concentration ammonia water as claimed in claim 1, wherein in step 3), NaOH with mass percentage of 30% is used to adjust the pH of the wastewater to 11-12.
5. The method for extracting ammonia gas from gentamicin fermentation wastewater to prepare high-concentration ammonia water according to claim 1, wherein in the step 4), the residual liquid after negative pressure distillation is sent to a sewage biochemical treatment system for subsequent wastewater treatment.
6. The method for preparing high-concentration ammonia water by extracting ammonia gas from gentamicin fermentation wastewater as claimed in claim 1, wherein in the step 5), 20% by mass of ammonia water is prepared.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140271438A1 (en) * | 2013-03-15 | 2014-09-18 | Ductor Oy | Extraction of nitrogen from organic materials through ammonification by mixed bacterial populations |
| CN104710081A (en) * | 2015-03-18 | 2015-06-17 | 河海大学 | Sewage nitrogen and phosphorus removal method and device |
| CN107585817A (en) * | 2017-10-23 | 2018-01-16 | 无锡市太湖湖泊治理股份有限公司 | High concentration ammoniacal liquor stripping processing unit |
| CN112546731A (en) * | 2020-12-04 | 2021-03-26 | 福安药业集团烟台只楚药业有限公司 | Solid-liquid separation treatment method for gentamicin fermentation waste liquid |
| CN215975863U (en) * | 2021-04-09 | 2022-03-08 | 无锡马盛环境能源科技有限公司 | Dephosphorization and denitrification system for kitchen garbage |
| CN114409075A (en) * | 2022-03-09 | 2022-04-29 | 天方药业有限公司 | Carbon source supplementing method in sewage denitrification process |
| CN114716117A (en) * | 2022-06-08 | 2022-07-08 | 南通宏謇水处理设备有限公司 | Treatment process of antibiotic production wastewater |
-
2022
- 2022-08-03 CN CN202210929098.3A patent/CN115072946A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140271438A1 (en) * | 2013-03-15 | 2014-09-18 | Ductor Oy | Extraction of nitrogen from organic materials through ammonification by mixed bacterial populations |
| CN104710081A (en) * | 2015-03-18 | 2015-06-17 | 河海大学 | Sewage nitrogen and phosphorus removal method and device |
| CN107585817A (en) * | 2017-10-23 | 2018-01-16 | 无锡市太湖湖泊治理股份有限公司 | High concentration ammoniacal liquor stripping processing unit |
| CN112546731A (en) * | 2020-12-04 | 2021-03-26 | 福安药业集团烟台只楚药业有限公司 | Solid-liquid separation treatment method for gentamicin fermentation waste liquid |
| CN215975863U (en) * | 2021-04-09 | 2022-03-08 | 无锡马盛环境能源科技有限公司 | Dephosphorization and denitrification system for kitchen garbage |
| CN114409075A (en) * | 2022-03-09 | 2022-04-29 | 天方药业有限公司 | Carbon source supplementing method in sewage denitrification process |
| CN114716117A (en) * | 2022-06-08 | 2022-07-08 | 南通宏謇水处理设备有限公司 | Treatment process of antibiotic production wastewater |
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