CN110697885A - Biological treatment method for synchronously removing ammonia nitrogen and cupric ions in wastewater - Google Patents
Biological treatment method for synchronously removing ammonia nitrogen and cupric ions in wastewater Download PDFInfo
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- CN110697885A CN110697885A CN201910906202.5A CN201910906202A CN110697885A CN 110697885 A CN110697885 A CN 110697885A CN 201910906202 A CN201910906202 A CN 201910906202A CN 110697885 A CN110697885 A CN 110697885A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater, which relates to the technical field of wastewater treatment, and is characterized in that activated sludge is taken from a concentration tank of a municipal sewage treatment plant and aerated for 24 hours to remove organic matters in the activated sludge, and then glucose is added to carry out aeration acclimation so as to recover the activity of the sludge; inoculating the activated sludge with the activity recovered into an SBR reactor, wherein the concentration of the inoculated sludge is 3000-3500mg/L, and the activated sludge is operated in an intermittent aeration mode and is used for synchronously removing ammonia nitrogen and copper ions in the wastewater. Different pollutants in the wastewater can be effectively removed in an intermittent aeration mode under the condition of adding the additive humic acid, meanwhile, the total nitrogen concentration in the wastewater is reduced through denitrification, the SBR reactor can keep stable operation for a long time, and the effective removal of the pollutants in the wastewater is realized.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a biological treatment method for synchronously removing ammonia nitrogen and cupric ions in wastewater.
Background
The mining, smelting and electroplating industries and the electronic industry discharge a large amount of copper-containing waste water every year, and the copper-containing waste water can cause obvious harm to an ecosystem and human beings if the copper-containing waste water is discharged randomly without being effectively treated. In addition, when copper-containing wastewater enters a wastewater treatment plant, the presence of copper ions can inhibit the activity of sludge, and the removal effect of ammonia nitrogen in the wastewater is poor. Humic acid is a macromolecular organic compound which widely exists in the environment and is relatively stable, contains various functional groups such as carboxyl, hydroxyl, amino and the like, and can perform ion exchange, adsorption, complexation, chelation and other phenomena with copper ions in wastewater, thereby inhibiting the toxicity of the copper ions to the sludge activity. In addition, the humic acid has larger pore diameter and specific surface area, can be used as a biological membrane for attaching microorganisms, and obviously improves the activity of the microorganisms. Therefore, the additive humic acid is added in the wastewater treatment process, and the removal of ammonia nitrogen and cupric ions in the wastewater can be synchronously realized.
Disclosure of Invention
The invention aims to provide a biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater with reasonable design aiming at the defects and defects of the prior art, which can effectively remove different pollutants in the wastewater in an intermittent aeration mode under the condition of adding additive humic acid, and simultaneously reduce the total nitrogen concentration in the wastewater through denitrification, so that an SBR reactor can keep stable operation for a long time, and the pollutants in the wastewater are effectively removed.
In order to achieve the purpose, the invention adopts the following technical scheme: the operation steps are as follows:
1. taking activated sludge from a concentration tank of a municipal sewage treatment plant, aerating for 24 hours to remove organic matters in the activated sludge, adding glucose, and carrying out aeration acclimation to recover the activity of the sludge;
2. inoculating the activated sludge with the activity recovered into an SBR reactor, wherein the concentration of the inoculated sludge is 3000-3500mg/L, and the activated sludge is operated in an intermittent aeration mode and is used for synchronously removing ammonia nitrogen and copper ions in the wastewater; the batch aeration mode of the SBR reactor is as follows:
2.1, water inlet stage: feeding water by using a peristaltic pump, wherein the hydraulic retention time of the SBR reactor is 12h, synchronously adding glucose, cupric ions, ammonia nitrogen and humic acid into the fed water, adding phosphate according to the proportion of COD (chemical oxygen demand) P =50:1, and supplementing NaHCO3Maintaining the required alkalinity and pH of microorganisms, maintaining the dissolved oxygen concentration in the SBR reactor at 1.0-1.5mg/L, stirring, and operating for 15 min;
2.2, operation stage: intermittent aeration, wherein the aeration time and the non-aeration time are both 2h, stirring is carried out during the aeration period, stirring is stopped during the non-aeration period, the last non-aeration time is 90min, the operation is carried out for 11.5h in total, and the COD (chemical oxygen demand), ammonia nitrogen and cupric ion concentrations of inlet and outlet water are regularly monitored;
2.3, a drainage stage: draining water by a peristaltic pump, operating for 15min, controlling the temperature of the SBR reactor at 20-25 ℃, controlling the pH value at 6.8-7.6 and controlling the water drainage ratio at 70%.
Further, the intermittent aeration mode of the SBR reactor is operated for 2 periods per day.
Further, the concentration of glucose added in the step 2.1 (calculated by COD) is 300-400 mg/L.
Further, the water inlet concentration of the divalent copper ions added in the step 2.1 is 5.0-8.0mg/L and is provided by blue copperas.
Further, the concentration of the ammonia nitrogen added in the step 2.1 is 20-40mg/L and is provided by ammonium chloride.
Furthermore, the concentration of the humic acid added in the step 2.1 is 10-12 mg/L.
Further, the phosphate added in step 2.1 is provided by monopotassium phosphate.
Further, the inlet water of step 2.1 is added with trace elements required by the following microorganisms: MgSO (MgSO)4·7H2O，CaCl2·H2O，FeCl3·6H2O，CuSO4·5H2O，MnSO4·H2O，ZnCl2， CoSO4·7H2O and Na2MoO4·2H2O, the contents of which are 23.9mg/L, 7.6mg/L, 7.0mg/L, 0.047mg/L, 0.06mg/L, 0.09mg/L, 0.2mg/L and 0.05mg/L, respectively.
Furthermore, the SBR reactor discharges sludge regularly, and the sludge concentration of the reactor is maintained to be 3000-3500 mg/L.
The invention has the beneficial effects that: the invention provides a biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater, which can effectively remove different pollutants in the wastewater in an intermittent aeration mode under the condition of adding additive humic acid, and simultaneously reduce the total nitrogen concentration in the wastewater through denitrification, so that an SBR reactor can keep stable operation for a long time, and the pollutants in the wastewater are effectively removed.
Description of the drawings:
FIG. 1 is a graph showing the change in the removal rate of COD, ammonia nitrogen and cupric ions from the feed water of the SBR reactor in example I.
FIG. 2 is a graph showing the change in the removal rate of COD, ammonia nitrogen and cupric ions in the influent water of the SBR reactor in comparison.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the following technical solutions are adopted in the present embodiment (example one): the operation steps are as follows:
1. taking activated sludge from a concentration tank of a municipal sewage treatment plant, aerating for 24 hours to remove organic matters in the activated sludge, adding glucose, and carrying out aeration acclimation to recover the activity of the sludge;
2. inoculating the activated sludge with the activity recovered into an SBR reactor (the intermittent aeration mode of the SBR reactor runs for 2 periods every day, periodically discharges sludge, maintains the sludge concentration of the reactor to be 3000-3500 mg/L), inoculates the sludge concentration to be 3000-3500mg/L, and runs in the intermittent aeration mode to synchronously remove ammonia nitrogen and copper ions in the wastewater; the batch aeration mode of the SBR reactor is as follows:
2.1, water inlet stage: feeding water by using a peristaltic pump, wherein the hydraulic retention time of the SBR reactor is 12h, synchronously adding glucose (the concentration of which is 300-400mg/L in terms of COD), cupric ions (the concentration of which is 5.0-8.0mg/L and is provided by blue vitriol), ammonia nitrogen (the concentration of which is 20-40mg/L and is provided by ammonium chloride) and humic acid (the concentration of which is 10-12 mg/L) into the fed water, adding phosphate (provided by potassium dihydrogen phosphate) and trace elements required by the following microorganisms according to the proportion of COD: P =50: 1: MgSO (MgSO)4·7H2O，CaCl2·H2O，FeCl3·6H2O，CuSO4·5H2O，MnSO4·H2O，ZnCl2，CoSO4·7H2O and Na2MoO4·2H2O in the content of 23.9mg/L, 7.6mg/L, 7.0mg/L, 0.047mg/L, 0.06mg/L, 0.09mg/L, 0.2mg/L and 0.05mg/L respectively, and NaHCO is supplemented3 to useMaintaining the required alkalinity and pH of microorganisms, maintaining the dissolved oxygen concentration in the SBR reactor at 1.0-1.5mg/L, stirring, and operating for 15 min;
2.2, operation stage: intermittent aeration, wherein the aeration time and the non-aeration time are both 2h, stirring is carried out during the aeration period, stirring is stopped during the non-aeration period, the last non-aeration time is 90min, the operation is carried out for 11.5h in total, the COD, the ammonia nitrogen and the concentration of cupric ions in the inlet and outlet water are regularly monitored (the COD is determined by an acid potassium dichromate method; the ammonia nitrogen is determined by a sodium reagent method; the cupric ions are determined by a sodium diethylamino dithiocarbamate extraction photometry), and the measurement result is shown in figure 1;
2.3, a drainage stage: draining water by a peristaltic pump, operating for 15min, controlling the temperature of the SBR reactor at 20-25 ℃, controlling the pH value at 6.8-7.6 and controlling the water drainage ratio at 70%.
The beneficial effects of the embodiment are as follows: the specific embodiment provides a biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater, different pollutants in the wastewater can be effectively removed in an intermittent aeration mode under the condition of adding additive humic acid, meanwhile, the total nitrogen concentration in the wastewater is reduced through denitrification, the SBR reactor can keep stable operation for a long time, and the pollutants in the wastewater are effectively removed.
Comparative example:
this comparative example differs from example one in that no humic acid was added at the water inlet stage of step 2.1, and the remaining operating conditions were the same as in example one. The removal rate of the influent COD, ammonia nitrogen and cupric ions during the operation of the SBR reactor of the comparative example is shown in figure 2. As can be seen from the results in the figures 1 and 2, in the process of synchronously treating the ammonia nitrogen and copper ion wastewater by using the SBR reactor, the addition of the additive humic acid is more favorable for maintaining the sludge activity, removing the COD (chemical oxygen demand), the ammonia nitrogen and the divalent copper ions of the inlet water and weakening the toxic action of the copper ions on the sludge, so that the method has important theoretical significance and practical value.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. A biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater is characterized in that: the operation steps are as follows:
(1) taking activated sludge from a concentration tank of a municipal sewage treatment plant, aerating for 24 hours to remove organic matters in the activated sludge, adding glucose, and carrying out aeration acclimation to recover the sludge activity;
(2) inoculating the activated sludge with the activity recovered into an SBR reactor, wherein the concentration of the inoculated sludge is 3000-3500mg/L, and the activated sludge is operated in an intermittent aeration mode and is used for synchronously removing ammonia nitrogen and copper ions in the wastewater; the batch aeration mode of the SBR reactor is as follows:
(2.1) water inlet stage: feeding water by using a peristaltic pump, wherein the hydraulic retention time of the SBR reactor is 12h, synchronously adding glucose, cupric ions, ammonia nitrogen and humic acid into the fed water, adding phosphate according to the proportion of COD (chemical oxygen demand) P (50: 1), and supplementing NaHCO3Maintaining the required alkalinity and pH of microorganisms, maintaining the dissolved oxygen concentration in the SBR reactor at 1.0-1.5mg/L, stirring, and operating for 15 min;
(2.2) operation stage: intermittent aeration, wherein the aeration time and the non-aeration time are both 2h, stirring is carried out during the aeration period, stirring is stopped during the non-aeration period, the last non-aeration time is 90min, the operation is carried out for 11.5h in total, and the COD (chemical oxygen demand), ammonia nitrogen and cupric ion concentrations of inlet and outlet water are regularly monitored;
(2.3) a drainage stage: draining water by a peristaltic pump, operating for 15min, controlling the temperature of the SBR reactor at 20-25 ℃, controlling the pH value at 6.8-7.6 and controlling the water drainage ratio at 70%.
2. The biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater according to claim 1, which is characterized in that: the concentration of the glucose added in the step (2.1) is 300-400 mg/L.
3. The biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater according to claim 1, which is characterized in that: the feed water concentration of the divalent copper ions added in the step (2.1) is 5.0-8.0mg/L and is provided by blue copperas.
4. The biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater according to claim 1, which is characterized in that: the concentration of the ammonia nitrogen added in the step (2.1) is 20-40mg/L and is provided by ammonium chloride.
5. The biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater according to claim 1, which is characterized in that: the concentration of the humic acid added in the step (2.1) is 10-12 mg/L.
6. The biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater according to claim 1, which is characterized in that: the phosphate added in the step (2.1) is provided by monopotassium phosphate.
7. The biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater according to claim 1, which is characterized in that: and (3) adding trace elements required by the following microorganisms into the inlet water obtained in the step (2.1): MgSO (MgSO)4·7H2O，CaCl2·H2O，FeCl3·6H2O，CuSO4·5H2O，MnSO4·H2O，ZnCl2，CoSO4·7H2O and Na2MoO4·2H2O, the contents of which are 23.9mg/L, 7.6mg/L, 7.0mg/L, 0.047mg/L, 0.06mg/L, 0.09mg/L, 0.2mg/L and 0.05mg/L, respectively.
8. The biological treatment method for synchronously removing ammonia nitrogen and divalent copper ions in wastewater according to claim 1, which is characterized in that: the SBR reactor discharges sludge regularly, and the sludge concentration of the reactor is maintained to be 3000-3500 mg/L.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302492A (en) * | 2020-03-09 | 2020-06-19 | 天津城建大学 | Method for removing phthalic acid ester in water |
| CN111647173A (en) * | 2020-05-09 | 2020-09-11 | 四川师范大学 | Sulfonated humic acid and preparation method thereof, compound modified humic acid adsorbent, application and application method |
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2019
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| CN102145964A (en) * | 2011-03-31 | 2011-08-10 | 北京大学 | Method for treating high-ammonia-nitrogen beryllium-containing waste water |
| CN104722571A (en) * | 2015-03-07 | 2015-06-24 | 湖南农业大学 | Method for oximating humus and removing heavy-metal copper (II) and pesticide simultaneously |
| CN106495317A (en) * | 2016-11-28 | 2017-03-15 | 华东交通大学 | A kind of cultural method of nitrification aerobic particle mud and purposes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302492A (en) * | 2020-03-09 | 2020-06-19 | 天津城建大学 | Method for removing phthalic acid ester in water |
| CN111647173A (en) * | 2020-05-09 | 2020-09-11 | 四川师范大学 | Sulfonated humic acid and preparation method thereof, compound modified humic acid adsorbent, application and application method |
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Application publication date: 20200117 |