CN104003515B - Bio-synergistic removes the treatment process of ammonia nitrogen - Google Patents
Bio-synergistic removes the treatment process of ammonia nitrogen Download PDFInfo
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- CN104003515B CN104003515B CN201310062128.6A CN201310062128A CN104003515B CN 104003515 B CN104003515 B CN 104003515B CN 201310062128 A CN201310062128 A CN 201310062128A CN 104003515 B CN104003515 B CN 104003515B
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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
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Abstract
The invention discloses a kind of bio-synergistic and remove the treatment process of ammonia nitrogen, comprise the following steps: step one, prepare nutritive medium, nutritive medium main component comprises ammonium chloride, sodium bicarbonate, iron(ic) chloride, magnesium chloride, phosphoric acid and sodium oxalate.Step 2, prepare nutrient solution, nutrient solution comprises biological inoculum, nutritive medium, sewage disposal plant effluent needed for biological inoculum existence.Step 3, culturing micro-organisms, the nutrient solution for step 2 provides suitable culture condition pH to be 7.5-8.5, and dissolved oxygen is for being greater than 2mg/L, and temperature is greater than 15 DEG C, and mud is greater than 5 days age, and BOD is less than 15mg/L.Step 4, scene add nutrient solution, are continued to add into main body Sewage treatment systems by the nitrifying sludge described in step 3.The present invention effectively can alleviate the problem of the treatment system nitrification ability reduction reducing because of envrionment temperature or cause containing suppressing nitrifier active constituent in sewage, and can reduce the running cost of sewage disposal.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, more particularly, relate to the treatment process that a kind of bio-synergistic removes ammonia nitrogen.
Background technology
In sewage disposal, it is the process of nitrate by nitrifier by mineralized nitrogen that nitration reaction refers to ammonia nitrogen in sewage under aerobic condition.In the process, nitrobacteria plays very important role.But nitrifier has harsher requirement for living environment, mainly comprise pH value (7.5-9.0), dissolved oxygen concentration (1.5-2.0mg/L), (35 DEG C is nitrifier optimal temperature to temperature; Temperature reduces, and the active page of nitrifier decreases).Meanwhile, once heavy metal (e.g., chromium, copper etc.) excessive concentration in sewage, also can cause the death of nitrifier and affect the process of nitration reaction.
Traditional be that in the sewage work of biologic treating technique, nitration reaction is mainly carried out in biochemistry pool with activated sludge process.Along with the surge of population, city domestic sewage treatment plant is faced with the challenge that pollutant load (e.g., COD load, nitrogen and phosphorus load etc.) day by day increases.If do not take appropriate measures, the serious consequence that sewage work may be made because pollutant load is excessive to cause treatment system paralyse.Meanwhile, along with the develop rapidly of every profession and trade, Industrial Waste Water Treatments factory is also faced with the waste water of the more severe toxicity of reception, difficult for biological degradation.This microorganism system for sewage work is acid test.
In addition, as previously mentioned, nitrifier is extremely responsive to envrionment temperature.Especially in the winter time, the activity of nitrifier is greatly diminished.Therefore the nitrification ability how improving sewage work at low ambient temperatures is also the problem that need solve.
Bio-synergistic technology refers to the technology improving Sewage treatment systems processing power, enhancing Sewage treatment systems processing efficiency in sewage treatment process by adding specific bacterial classification.The bio-synergistic technology of nitrifier refers to the nitrifier by adding cultivation in Sewage treatment systems, thus improves the nitrification ability of system.
The treatment process that patent No. CN102583706A discloses a kind of high salt, low-carbon industrial waste water continuous bio-synergistic removes ammonia nitrogen.Continue to add nutrient solution by scene and extend the residence time of biological inoculum in aeration tank, improving nitrification effect.Therefore, the bio-synergistic technology of nitration reaction effectively can alleviate the problem of the treatment system nitrification ability reduction reducing because of envrionment temperature or cause containing suppressing nitrifier active constituent in sewage.
Summary of the invention
Object of the present invention aims to provide the treatment process that a kind of bio-synergistic removes ammonia nitrogen.The present invention, by adding the nitrifier cultivated voluntarily to main body Sewage treatment systems, reduces in order to alleviate the system nitrification ability caused because of low temperature or hypertoxic waste water, thus realizes the enhancing to treatment system nitrification ability.
According to the present invention, provide a kind of bio-synergistic to remove the treatment process of ammonia nitrogen, comprise the following steps: step one, prepare nutritive medium, nutritive medium main component comprises ammonium chloride, sodium bicarbonate, iron(ic) chloride, magnesium chloride, phosphoric acid and sodium oxalate.Step 2, prepare nutrient solution, nutrient solution comprises biological inoculum, nutritive medium, sewage disposal plant effluent needed for biological inoculum existence.Step 3, culturing micro-organisms, the nutrient solution for step 2 provides suitable culture condition pH to be 7.5-8.5, and dissolved oxygen is for being greater than 2mg/L, and temperature is greater than 15 DEG C, and mud is greater than 5 days age, and BOD is less than 15mg/L.Step 4, scene add nutrient solution, are continued to add into main body Sewage treatment systems by the nitrifying sludge described in step 3.
Biological inoculum is take from the active sludge in sewage disposal plant aeration tank; Nutritive medium needed for biological inoculum existence is the nutritive medium of step one.Sewage disposal plant effluent is the water outlet of qualified discharge after sewage work's process.
The concrete technology condition of nutrient solution is: with 8 hours for gap periods adds the bio-synergistic nutritive medium of step one, nutritive substance daily intaking amount need meet following requirement: ammonium chloride 25-75kg/ days, sodium bicarbonate 100-200kg/ days, iron(ic) chloride and magnesium chloride is less than 5kg/ days, phosphatase 11 0mg/L phosphorus, sodium oxalate 15kg/ days.
In nutrient solution, ammonia nitrogen concentration maintains 160-490mg/L, after every day three gap periods, discharges the mud mixture of 20% volume in culture apparatus.
Nutrient solution for step 2 carries out the Monitoring Indexes of timing.Index comprise total suspended solid concentration, total volatile suspended solid concentration, ammonia nitrogen concentration, COD, nitrite and nitrate concentration.
Under the culture condition of step 3, the variation tendency of ammonia nitrogen concentration in monitoring culture apparatus, once ammonia nitrogen removal frank is greater than 60%, stops aeration, discharges the bacterium liquid of 50%, add sewage disposal plant effluent; Repeat said process until mud SVI index is less than 150.
The culture condition of step 3 is ensured by ammonium chloride concentration in the nutrient solution that progressively increases step 2, the nitrifying sludge that in monitoring culture apparatus, the variation tendency of ammonia nitrogen concentration is cultivated, once ammonia nitrogen concentration is lower than 10mg/L, stop aeration, discharge the bacterium liquid of 50%, add sewage disposal plant effluent, repeat said process, culture cycle is about 2-3 week.
The treatment process of a kind of bio-synergistic removal ammonia nitrogen of the present invention's proposition effectively can alleviate the problem of the treatment system nitrification ability reduction reducing because of envrionment temperature or cause containing suppressing nitrifier active constituent in sewage, the nitrification ability of Sewage treatment systems can be strengthened, and the running cost of sewage disposal can be reduced.
Accompanying drawing explanation
Fig. 1 is the schema that bio-synergistic of the present invention removes the treatment process of ammonia nitrogen.
Embodiment
Below in conjunction with embodiment, embodiment is elaborated: a kind of bio-synergistic removes the treatment process of ammonia nitrogen, comprises the steps and processing condition.
Step one, prepare nutritive medium;
1) the bio-synergistic nutritive medium main component described in comprises ammonium chloride, sodium bicarbonate, iron(ic) chloride, magnesium chloride, phosphoric acid and organic nutrient substance sodium oxalate;
In this step, ammonium chloride provides nitrogenous source for microorganism; Sodium bicarbonate provides the basicity needed for nitration reaction, and energy adjust ph; Iron(ic) chloride, magnesium chloride for microorganism provide trace element; Phosphoric acid provides phosphorus source for microorganism; Sodium oxalate provides organic nutrient substance for microorganism.
Step 2, prepare nutrient solution;
1) nutritive medium, sewage disposal plant effluent needed for the bio-synergistic nutrient solution described in comprises biological inoculum, biological inoculum is survived.Described biological inoculum is take from the active sludge in sewage disposal plant aeration tank; The described nutritive medium needed for biological inoculum existence is the bio-synergistic nutritive medium described in step one; Described sewage disposal plant effluent is the water outlet of qualified discharge after sewage work's process;
2) the concrete technology condition of the bio-synergistic nutrient solution described in is: technique is principle based on sequencing batch reactor, with 8 hours for gap periods adds bio-synergistic nutritive medium described in step one.But nutritive substance daily intaking amount need meet following requirement: ammonium chloride 25-75kg/ days, sodium bicarbonate 100-200kg/ days, iron(ic) chloride and magnesium chloride is less than 5kg/ days, phosphatase 11 0mg/L phosphorus, sodium oxalate 15kg/ days; Ensure that in nutrient solution, ammonia nitrogen concentration maintains 160-490mg/L; After every day three gap periods, discharge the mud mixture of 20% volume in culture apparatus;
Take sequencing batch reactor as principle in this step, carry out fixed cycle operator for bio-synergistic nutritive medium, spoil disposal etc., be convenient to run control and management; Adopting the active sludge in sewage disposal plant aeration tank to be the cultivation that bacterial classification carries out nitrifying sludge, namely save cost without the need to buying extraordinary nitrobacteria, and culture cycle is short compared with the culture cycle of external source special bacteria.
Step 3, culturing micro-organisms;
1) cultivate: for the nutrient solution described in step 2 provides suitable culture condition pH to be 7.5-8.5, dissolved oxygen is for being greater than 2mg/L, and temperature is greater than 15 DEG C, and mud is greater than 5 days age, and BOD is less than 15mg/L;
2) monitor: for the nutrient solution described in step 2 carries out the Monitoring Indexes of timing.Described index comprises total suspended solid concentration, total volatile suspended solid concentration, ammonia nitrogen concentration, COD, nitrite and nitrate concentration.The monitoring frequency of described monitoring index is secondary on every Wendesdays;
3) culturing sludge: under the culture condition described in step 3, the variation tendency of ammonia nitrogen concentration in monitoring culture apparatus.Once ammonia nitrogen removal frank is greater than 60%, stop aeration, discharge the bacterium liquid of 50%, add sewage disposal plant effluent.Repeat said process until mud has good settling property (mud SVI index is less than 150);
4) nitrifying sludge is cultivated: by progressively increasing ammonium chloride concentration in the nutrient solution described in step 2 and ensureing the culture condition described in step 3, the nitrifying sludge described in variation tendency cultivation of ammonia nitrogen concentration in monitoring culture apparatus.Once ammonia nitrogen concentration is lower than 10mg/L, stop aeration, discharge the bacterium liquid of 50%, add sewage disposal plant effluent.Repeat said process, culture cycle is about 2-3 week;
Very important for the control of culture condition in this step, the especially parameter such as pH value, dissolved oxygen concentration, temperature.The nitrifying sludge of turning out has the features such as settling property is good, nitrification ability is strong.
Step 4, scene add nutrient solution;
Nitrifying sludge described in step 3 is continued to add into main body Sewage treatment systems.
The present invention effectively can alleviate the problem of the treatment system nitrification ability reduction reducing because of envrionment temperature or cause containing suppressing nitrifier active constituent in sewage, can strengthen the nitrification ability of Sewage treatment systems.
Further illustrate below in conjunction with specific embodiment:
Shanghai Industrial Waste Water Treatments factory sets up nitrifier throwing device
Step one, prepare nutritive medium;
The nutritive medium of preparation containing ammonium chloride, sodium bicarbonate, iron(ic) chloride, magnesium chloride, phosphoric acid and organic nutrient substance sodium oxalate;
Step 2, prepare nutrient solution;
1) culture apparatus useful volume is 130 cubic metres, in culture apparatus, add bio-synergistic nutrient solution, comprise the active sludge (biological inoculum) taken from this sewage disposal plant aeration tank, biological inoculum existence needed for nutritive medium, this sewage disposal plant effluent.
2) technique is principle based on sequencing batch reactor, with 8 hours for gap periods adds the bio-synergistic nutritive medium of 20 cubic metres.But nutritive substance daily intaking amount need meet following requirement: ammonium chloride 25-75kg/ days, sodium bicarbonate 100-200kg/ days, iron(ic) chloride and magnesium chloride is less than 5kg/ days, phosphatase 11 0mg/L phosphorus, sodium oxalate 15kg/ days; Ensure that in nutrient solution, ammonia nitrogen concentration maintains 160-490mg/L; After every day three gap periods, discharge the mud mixture of 20% volume in culture apparatus;
Step 3, culturing micro-organisms;
1) culture condition that nutrient solution is suitable is as follows: pH is 7.5-8.5, and dissolved oxygen is for being greater than 2mg/L, and temperature is greater than 15 DEG C, and mud is greater than 5 days age, and BOD is less than 15mg/L;
2) culturing sludge: under above-mentioned culture condition, the variation tendency of ammonia nitrogen concentration in monitoring culture apparatus.Once ammonia nitrogen removal frank is greater than 60%, stop aeration, discharge the bacterium liquid of 50%, add sewage disposal plant effluent.Repeat said process until mud has good settling property (mud SVI index is less than 150);
3) nitrifying sludge is cultivated: by progressively increasing ammonium chloride concentration in nutrient solution and ensureing the culture condition described in step 3, the nitrifying sludge described in variation tendency cultivation of ammonia nitrogen concentration in monitoring culture apparatus.Once ammonia nitrogen concentration is lower than 10mg/L, stop aeration, discharge the bacterium liquid of 50%, add sewage disposal plant effluent.Repeat said process, culture cycle is about 2-3 week;
Step 4, scene add nutrient solution;
Nitrifying sludge is continued add into main body Sewage treatment systems.
Through Data Comparison, after the actual use of the bio-synergistic Technical investment of nitrobacteria, winter, the ammonia nitrogen removal frank of Sewage treatment systems reached 83.3%, and when this technology does not come into operation, winter, ammonia nitrogen removal frank was only 56%.Meanwhile, the usage quantity of chemical agent also reduces greatly, saves the running cost of sewage work.
Those of ordinary skill in the art will be appreciated that, above specification sheets is only one or more embodiments in the numerous embodiment of the present invention, and not uses limitation of the invention.Any equalization for the above embodiment changes, modification and the equivalent technical scheme such as to substitute, as long as spirit according to the invention, all will drop in scope that claims of the present invention protect.
Claims (7)
1. bio-synergistic removes a treatment process for ammonia nitrogen, it is characterized in that, comprises the following steps:
Step one, prepare nutritive medium, described nutritive medium main component comprises ammonium chloride, sodium bicarbonate, iron(ic) chloride, magnesium chloride, phosphoric acid and sodium oxalate;
Step 2, prepare nutrient solution, described nutrient solution comprises the water outlet of qualified discharge after biological inoculum, nutritive medium needed for biological inoculum existence, sewage work's process; The active sludge in sewage disposal plant aeration tank is adopted to carry out the cultivation of nitrifying sludge as described bacterial classification;
Step 3, culturing micro-organisms, for the nutrient solution described in step 2 provides suitable culture condition pH to be 7.5-8.5, dissolved oxygen is for being greater than 2mg/L, and temperature is greater than 15 DEG C, and mud is greater than 5 days age, and BOD is less than 15mg/L; By progressively increasing ammonium chloride concentration in the nutrient solution described in step 2 and ensureing the culture condition described in this step, the variation tendency of ammonia nitrogen concentration in monitoring culture apparatus, the nitrifying sludge described in cultivation;
Step 4, scene add nutrient solution, are continued to add into main body Sewage treatment systems by the nitrifying sludge that step 3 is cultivated.
2. bio-synergistic as claimed in claim 1 removes the treatment process of ammonia nitrogen, it is characterized in that, the nutritive medium needed for described biological inoculum existence is the nutritive medium described in step one.
3. bio-synergistic as claimed in claim 1 removes the treatment process of ammonia nitrogen, it is characterized in that, the concrete technology condition of described nutrient solution for: with 8 hours for gap periods adds nutritive medium described in step one, the nutritive substance daily intaking amount of described nutritive medium need meet following requirement: ammonium chloride 25-75kg/ days, sodium bicarbonate 100-200kg/ days, iron(ic) chloride and magnesium chloride is less than 5kg/ days, phosphatase 11 0mg/L days, sodium oxalate 15kg/ days.
4. bio-synergistic as claimed in claim 3 removes the treatment process of ammonia nitrogen, and it is characterized in that, in nutrient solution, ammonia nitrogen concentration maintains 160-490mg/L; After every day three gap periods, discharge the mud mixture of 20% volume in culture apparatus.
5. bio-synergistic as claimed in claim 1 removes the treatment process of ammonia nitrogen, it is characterized in that, for the nutrient solution described in step 2 carries out the Monitoring Indexes of timing; Described index comprises total suspended solid concentration, total volatile suspended solid concentration, ammonia nitrogen concentration, COD, nitrite and nitrate concentration.
6. bio-synergistic as claimed in claim 1 removes the treatment process of ammonia nitrogen, it is characterized in that, under the culture condition described in step 3, the variation tendency of ammonia nitrogen concentration in monitoring culture apparatus, once ammonia nitrogen removal frank is greater than 60%, stop aeration, discharge the bacterium liquid of 50%, add sewage disposal plant effluent; Repeat said process until mud SVI index is less than 150.
7. bio-synergistic as claimed in claim 1 removes the treatment process of ammonia nitrogen, it is characterized in that, by progressively increasing ammonium chloride concentration in the nutrient solution described in step 2 and ensureing the culture condition described in step 3, in monitoring culture apparatus, the nitrifying sludge described in variation tendency cultivation of ammonia nitrogen concentration, once ammonia nitrogen concentration is lower than 10mg/L, stops aeration, discharge the bacterium liquid of 50%, add sewage disposal plant effluent, repeat said process, culture cycle is 2-3 week.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004028980A1 (en) * | 2002-09-25 | 2004-04-08 | Degremont | Method and device for reducing sludge from biological wastewater treatment stations |
| CN1986447A (en) * | 2005-12-22 | 2007-06-27 | 中国石化上海石油化工股份有限公司 | Sequencing batch active sludge process for eliminating ammonia nitrogen from sewage |
| CN101240253A (en) * | 2007-02-09 | 2008-08-13 | 中国石油化工股份有限公司 | Method for concentrating highly effective nitrobacteria in active sludge |
| CN102583706A (en) * | 2012-01-16 | 2012-07-18 | 宜态科环保技术(苏州)有限公司 | Processing method for removing ammonia nitrogen through high-salt low-carbon industrial waste water continuous biological synergism |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004028980A1 (en) * | 2002-09-25 | 2004-04-08 | Degremont | Method and device for reducing sludge from biological wastewater treatment stations |
| CN1986447A (en) * | 2005-12-22 | 2007-06-27 | 中国石化上海石油化工股份有限公司 | Sequencing batch active sludge process for eliminating ammonia nitrogen from sewage |
| CN101240253A (en) * | 2007-02-09 | 2008-08-13 | 中国石油化工股份有限公司 | Method for concentrating highly effective nitrobacteria in active sludge |
| CN102583706A (en) * | 2012-01-16 | 2012-07-18 | 宜态科环保技术(苏州)有限公司 | Processing method for removing ammonia nitrogen through high-salt low-carbon industrial waste water continuous biological synergism |
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