CN103739178A - Rapid starting method of anaerobic ammonia oxidation reactor for enhancing sludge hydrolysis - Google Patents
Rapid starting method of anaerobic ammonia oxidation reactor for enhancing sludge hydrolysis Download PDFInfo
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Abstract
The invention discloses a rapid starting method of an anaerobic ammonia oxidation reactor for enhancing sludge hydrolysis. The rapid starting method is characterized by comprising the following steps: carrying out high-substrate concentration pre-treatment on inoculated sludge to accelerate heterotrophic bacteria to be dead of hunger and utilizing the inoculated sludge to an inoculating reactor; continually carrying out policies including high substrate concentration, low hydraulic retention time, high liquid surface ascending velocity, pH (Potential of Hydrogen) regulation and control to rapidly eliminate the heterotrophic bacteria and improve the density of the heterotrophic bacteria in the sludge, so as to finally realize the rapid starting of the anaerobic ammonia oxidation reactor. According to the rapid starting method, the quantity of the heterotrophic bacteria in the sludge can be obviously reduced in short time and the density of anaerobic ammonia oxidation bacteria is increased; the rapid starting method can observe an obvious and continuous anaerobic ammonia oxidation phenomenon of the reactor after the reactor is started for 32 days.
Description
Technical field
The present invention relates to wastewater biological denitrificaion technical field, particularly a kind of quick start method of anaerobic ammonia oxidation reactor.
Background technology
The Eleventh Five-Year Plan period, chemical oxygen demand (COD) (chemical oxygen demand, COD) discharge is effectively controlled, and ammonia nitrogen rises to the principal pollutant of surface water, the whole nation surface water ammonia nitrogen phenomenon ubiquity that exceeds standard, due to body eutrophication very serious.China has included ammonia nitrogen in " 12 " total amount of pollutant hierarchy of control.Water body nitrate pollution is controlled has become current great environmental protection subject urgently to be resolved hurrily.
Anammox can nitrite be that electron acceptor(EA) is the process of nitrogen and a small amount of nitrate by ammonia oxidation.The volume usefulness of this technique can be up to 77kg/ (m
3d), far away higher than traditional nitration denitrification technique; Without aeration and interpolation organic carbon source, excess sludge production is low, and than traditional biological denitrification process, processing cost significantly reduces.Thereby this process quilt is thought the Novel waste denitrogenation of water technology of tool Sustainable development characteristic so far.
But anaerobic ammonia oxidizing bacteria is autotroph, cell yield is low, and the doubling time reaches 11d, to envrionment conditions (as organism, temperature etc.) sensitivity, causes the start-up course of reactor very slow.While adopting conventional activated sludge inoculation, often need several months year even, reactor just can manifest obvious Anammox phenomenon, has seriously restricted the engineering application of this technique.
When inoculation conventional activated sludge starts anaerobic ammonia oxidation reactor, because wherein containing a large amount of heterotrophic bacteriums, can to anaerobic ammonia oxidizing bacteria, produce the competition of matrix and living space, be unfavorable for growth and the propagation of anaerobic ammonia oxidizing bacteria.As heterotroph denitrifying bacteria can preferentially utilize nitrite, carry out denitrification, cause Anammox to be difficult to obtain matrix nitrite; In addition, the doubling time of heterotrophic bacterium is significantly shorter than anaerobic ammonia oxidizing bacteria, more easily in the finite space, seizes competitive advantage, and hinders the amplification of anaerobic ammonia oxidizing bacteria, causes anaerobic ammonia oxidation reactor to start slowly.
For the problems referred to above, the present invention proposes reinforcement sludge and is hydrolyzed to accelerate the method that anaerobic ammonia oxidation reactor starts, by seed sludge being carried out to high substrate concn pre-treatment, to the higher starting substrate concentration of reactor setting and lower hydraulic detention time, and reaction solution is carried out to the measures such as pH regulation and control, make the heterotrophic bacterium hungry hydrolysis fast in seed sludge, and washed out rapidly, the density that improves at short notice anaerobic ammonia oxidizing bacteria in reactor, finally realizes the quick startup of anaerobic ammonia oxidation reactor.Evidence, adopts the enhanced hydrolysis starting method of this anaerobic ammonia oxidation reactor can greatly shorten the start time of anaerobic ammonia oxidation reactor.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of anaerobic ammonia oxidation reactor quick start method convenient, that reinforcement sludge is hydrolyzed is fast provided.
A kind of anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis, first seed sludge to be carried out to high substrate concn pre-treatment, to accelerate the hunger death of heterotrophic bacterium, be used further to reaction of inoculation device, then reactor is taked the strategies such as high substrate concn, low hydraulic detention time, high surperficial upflow velocity and pH regulation and control, eliminate fast heterotrophic bacterium, improve the density of anaerobic ammonia oxidizing bacteria in mud, finally realize the quick startup of anaerobic ammonia oxidation reactor.
The anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis of the present invention, comprises the following steps:
An anaerobic ammonia oxidation reactor quick start method for reinforcement sludge hydrolysis, comprises the following steps:
(1) choose granule sludge, with phosphoric acid buffer, rinse and remove organism;
(2) add the mixed solution of ammonia and nitrite, keep anoxia condition, mix rear standing, make the heterotrophic bacterium fast hydrolyzing in mud dead, treat that supernatant liquor is smelly, blackening, supernatant liquor is inclined to, with phosphoric acid buffer, clean the mud after standing again, the organism that sludge hydrolytic is discharged is cleaned;
(3) repetitive operation step (2) at least 1 time;
(4) mud obtaining is added to anaerobic ammonia oxidation reactor after step (3) is processed, keep anoxic condition in reactor, by controlling the water inlet ammonia of reactor and initial concentration and the hydraulic detention time of nitrite, make the hydrolysis self-dissolving of heterotroph bacterium in mud; Control reaction zone fluid surface upflow velocity, so that the organism of the floc sludge forming after sludge hydrolytic and release is washed out rapidly to reactor simultaneously;
(5) mode simultaneously adding by quantitative flow is to the reactor bottom stream liquid that adds dilute alkali, and reinforcement sludge hydrolysis, and alleviating because of the acidification due to hydrolysis adds diluted acid to reactor middle and upper part stream, alleviates because of the alkalinization due to denitrification.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, the granularity of choosing in step (1) is 1～4mm, and density is not less than 1.05g/mL, and settling velocity is not less than 20m/h.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, the ammonia concentration of the mixed solution of the ammonia described in step (2) and nitrite is 100～150mg/L, nitrite concentration is 100～200mg/L, all in nitrogen.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, in step (1) and (2), phosphate buffer density is 1mmol/L, pH is 7.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, in step (4), the water inlet ammonia of control reactor and the initial concentration of nitrite are 150～200mg/L, all in nitrogen, hydraulic detention time is 4～8h, and it is 6.3～12.7cm/h that reaction zone fluid surface upflow velocity is controlled.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, described anaerobic ammonia oxidation reactor is upflow anaerobic sludge blanket reactor, the blade diameter length ratio of reaction zone is 1:10～1:15, mud add-on is 2/3～4/5 of reaction zone volume, and working temperature is set to 30～37 ℃.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, the bicarbonate solution that the sig water in step (5) is 1.5～3.0g/L, flow acceleration is 30～50mL/ (Ld).
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, hydrochloric acid or sulphuric acid soln that the diluted acid in step (5) is 2mmol/L～5mmol/L, flow acceleration is 20～40mL/ (Ld).
Compared with prior art, the present invention has advantages of:
(1) the present invention adopts high matrix (especially nitrite) concentration to carry out pre-treatment to seed sludge, dead by the heterotrophic bacterium fast hydrolyzing in the toxic action promotion mud of high density matrix; By the flushing repeatedly of phosphoric acid buffer, the organism that sludge hydrolytic is discharged is cleaned simultaneously, avoids it to join the Growth and metabolism that affects anaerobic ammonia oxidizing bacteria in reactor.
(2) the present invention is in reactor start-up process, higher water inlet substrate concn and shorter hydraulic detention time are set, make reactor volume traffic overload, further accelerate the hydrolysis self-dissolving of heterotroph bacterium in mud, reach and significantly reduce at short notice the quantity of heterotroph bacterium and the effect of density, and then increase the density of anaerobic ammonia oxidizing bacteria.
(3) the present invention adopts high fluid surface upflow velocity, can rapidly the organism of the floc sludge forming after sludge hydrolytic and release be washed out rapidly to reactor, alleviates its negative impact to Anammox.
(4) the present invention is at the reactor bottom quantitative flow liquid that adds dilute alkali, can be hydrolyzed by reinforcement sludge, and alleviate because of the acidification due to hydrolysis, at middle part, quantitative flow adds diluted acid, can alleviate because of the alkalinization due to denitrification, maintain the suitableeest scope (7.5～8.3) of the pH value of reaction solution in Anammox.
(5) the enhanced hydrolysis starting method of this anaerobic ammonia oxidation reactor of employing the present invention can shorten the start time of anaerobic ammonia oxidation reactor greatly.
Accompanying drawing explanation
Fig. 1 is the technical process of the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis of the present invention, and in Fig. 1, the concentration of ammonia and nitrite is all in nitrogen;
Fig. 2 is for adopting embodiments of the invention 1 to start the granule sludge picture of front and back; Fig. 2 a is the photo of seed sludge anaerobic grain sludge, and Fig. 2 b is the mud picture that 70d takes out from reactor, the photo that Fig. 2 c is single anaerobic ammonium oxidation granular sludge;
Fig. 3 is for adopting floc sludge picture (the anaerobic ammonia oxidation reactor picture (Fig. 3 b) of Fig. 3 a) and having started of collecting from reactor water outlet in embodiments of the invention 2.
Embodiment:
Below by case study on implementation, the invention will be further described, and unrestricted the present invention.
Embodiment 1
From certain paper mill effluent treatment station IC reactor, fetch anaerobic grain sludge 1L, recording its particle diameter is 2.5 ± 0.4mm, density is 1.081 ± 0.055g/mL, settling velocity is 36.7 ± 3.8m/h, first adopt phosphoric acid buffer (1mmol/L, pH is 7) granule sludge of fetching is rinsed 3 times, the container that packs 2L into, adding ammonia concentration is 120mg/L, nitrite concentration is that 150mg/L(is all in nitrogen) matrix solution, stir 10min, after passing into argon gas 30min, be statically placed in shady place 1d, smelly, after blackening, incline continue after supernatant liquor for phosphoric acid buffer rinse 3 times.Granule sludge after cleaning repeats above operation again and completes pre-treatment 2 times.By pretreated sludge seeding to cubic capacity 2.5L, the Anammox UASB reactor of reaction zone volume 1.1L, initial water inlet matrix ammonia and nitrite concentration are set and are 150mg/L, all in nitrogen, initial hydraulic detention time 7.5 ± 0.3h, reaction zone fluid surface upflow velocity is 6.77 ± 0.76cm/h, carry out the startup of anaerobic ammonia oxidation reactor, in operational process, by peristaltic pump, from the slow stream of reactor bottom, add the potassium bicarbonate solution of 1.5g/L, average flow Acceleration Control is 42mL/ (Ld), from the reactor middle part 2mmol/L dilute hydrochloric acid solution that slowly stream adds, average flow Acceleration Control is 35mL/ (Ld), continuously after operation 32d, can observe reactor continuous, obvious Anammox phenomenon, 77d operation, reactor reaches respectively 90% and 99% to the clearance of ammonia and nitrite, move to the red anaerobic ammonium oxidation granular sludge that 100d has obtained feature distinctness.In whole start-up course, reactor water outlet pH value all-the-time stable is in 7.5～8.2.
Embodiment 2
From certain beer brewery water treatment station, get anaerobic grain sludge, record its median size 1.7mm, mean density is 1.056g/mL, and settling velocity is 26.4m/h, and adding ammonia concentration is 150mg/L, and nitrite concentration is 170mg/L; In UASB reactor start-up process, initial water inlet matrix ammonia and nitrite concentration are set and are 180mg/L, all in nitrogen, initial hydraulic detention time 5h, reaction zone fluid surface upflow velocity is 10.19cm/h, in operational process, the potassium bicarbonate solution that adds 2.0g/L from the slow stream of reactor bottom by peristaltic pump is that flow acceleration is 35mL/ (Ld)), from reactor middle part, slowly stream adds 3.5mmol/L dilute hydrochloric acid solution (flow acceleration is 26mL/ (Ld)).
All the other conditions are identical with embodiment 1.
At the front 6d of reactor start-up process, reactor water outlet ammonia nitrogen concentration (>300mg/L) is significantly higher than influent ammonium concentration, shows that now the interior mud of reactor is hydrolyzed rapidly, discharges inorganic states ammonia nitrogen; 6th～13d, reactor water outlet ammonia nitrogen concentration is reduced to gradually and approaches 180mg/L, roughly maintain an equal level with influent ammonium concentration, 14th～37d, the average water outlet ammonia nitrogen concentration of reactor is 171mg/L, present typical active lagging characteristics in Anammox start-up course, to 42d, ammonia nitrogen removal frank reaches 30%, and the anaerobic ammoxidation activity of this post-reactor strengthens gradually, through 130d operation, the granule sludge in reactor almost all changes redness into.
Claims (8)
1. an anaerobic ammonia oxidation reactor quick start method for reinforcement sludge hydrolysis, is characterized in that, comprises the following steps:
(1) choose granule sludge, with phosphoric acid buffer, rinse and remove organism;
(2) add the mixed solution of ammonia and nitrite, keep anoxia condition, mix rear standing, make the heterotrophic bacterium fast hydrolyzing in mud dead, treat that supernatant liquor is smelly, blackening, supernatant liquor is inclined to, with phosphoric acid buffer, clean the mud after standing again, the organism that sludge hydrolytic is discharged is cleaned;
(3) repetitive operation step (2) at least 1 time;
(4) mud obtaining is added to anaerobic ammonia oxidation reactor after step (3) is processed, keep anoxic condition in reactor, by controlling the water inlet ammonia of reactor and initial concentration and the hydraulic detention time of nitrite, make the hydrolysis self-dissolving of heterotroph bacterium in mud; Control reaction zone fluid surface upflow velocity, so that the organism of the floc sludge forming after sludge hydrolytic and release is washed out rapidly to reactor simultaneously;
(5) mode simultaneously adding by quantitative flow is to the reactor bottom stream liquid that adds dilute alkali, and reinforcement sludge hydrolysis, and alleviating because of the acidification due to hydrolysis adds diluted acid to reactor middle and upper part stream, alleviates because of the alkalinization due to denitrification.
2. the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis according to claim 1, is characterized in that: the granularity of choosing in step (1) is 1～4mm, and density is not less than 1.05g/mL, and settling velocity is not less than 20m/h.
3. the anaerobic ammonia oxidation reactor quick start method that reinforcement sludge according to claim 1 is hydrolyzed, it is characterized in that: the ammonia concentration of the mixed solution of the ammonia described in step (2) and nitrite is 100～150mg/L, nitrite concentration is 100～200mg/L, all in nitrogen.
4. the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis according to claim 1, is characterized in that: in step (1) and (2), phosphate buffer density is 1mmol/L, and pH is 7.
5. the anaerobic ammonia oxidation reactor quick start method that reinforcement sludge according to claim 1 is hydrolyzed, it is characterized in that: in step (4), control the water inlet ammonia of reactor and the initial concentration of nitrite and be 150～200mg/L, all in nitrogen, hydraulic detention time is 4～8h, and it is 6.3～12.7cm/h that reaction zone fluid surface upflow velocity is controlled.
6. the anaerobic ammonia oxidation reactor quick start method that reinforcement sludge according to claim 1 is hydrolyzed, it is characterized in that: described anaerobic ammonia oxidation reactor is upflow anaerobic sludge blanket reactor, the blade diameter length ratio of reaction zone is 1:10～1:15, mud add-on is 2/3～4/5 of reaction zone volume, and working temperature is set to 30～37 ℃.
7. the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis according to claim 1, is characterized in that: the bicarbonate solution that the sig water in step (5) is 1.5～3.0g/L, flow acceleration is 30～50mL/ (Ld).
8. the anaerobic ammonia oxidation reactor quick start method that reinforcement sludge according to claim 1 is hydrolyzed, it is characterized in that: hydrochloric acid or sulphuric acid soln that the diluted acid in step (5) is 2mmol/L～5mmol/L, flow acceleration is 20～40mL/ (Ld).
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| CN104556356A (en) * | 2014-12-29 | 2015-04-29 | 中南大学 | Method for quickly starting shortcut nitrification reactor |
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| CN105502649A (en) * | 2015-11-25 | 2016-04-20 | 中南大学 | Method for alleviating floating of anaerobic ammoxidation granular sludge |
| CN110615525A (en) * | 2018-06-20 | 2019-12-27 | 中国石油化工股份有限公司 | Method for enriching anaerobic ammonium oxidation bacteria and application |
| CN110615526A (en) * | 2018-06-20 | 2019-12-27 | 中国石油化工股份有限公司 | Starting method of anaerobic ammonia oxidation process |
| CN115072866A (en) * | 2022-07-15 | 2022-09-20 | 广东轻工职业技术学院 | Rapid starting operation method of anaerobic ammonia oxidation process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104556356A (en) * | 2014-12-29 | 2015-04-29 | 中南大学 | Method for quickly starting shortcut nitrification reactor |
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| CN110615526B (en) * | 2018-06-20 | 2022-03-29 | 中国石油化工股份有限公司 | Starting method of anaerobic ammonia oxidation process |
| CN110615525B (en) * | 2018-06-20 | 2022-07-12 | 中国石油化工股份有限公司 | Method for enriching anaerobic ammonium oxidation bacteria and application |
| CN115072866A (en) * | 2022-07-15 | 2022-09-20 | 广东轻工职业技术学院 | Rapid starting operation method of anaerobic ammonia oxidation process |
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