CN104512962A - Method for enhancing anaerobic ammoxidation effect of deposit by using water treatment plant waste mud - Google Patents
Method for enhancing anaerobic ammoxidation effect of deposit by using water treatment plant waste mud Download PDFInfo
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- CN104512962A CN104512962A CN201310456254.XA CN201310456254A CN104512962A CN 104512962 A CN104512962 A CN 104512962A CN 201310456254 A CN201310456254 A CN 201310456254A CN 104512962 A CN104512962 A CN 104512962A
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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
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Abstract
The invention provides a method for enhancing the anaerobic ammoxidation effect of a deposit by using water treatment plant waste mud (WTRs) as a carrier, and belongs to the technical field of water treatment. The method is characterized in that the deposit and the WTRs are enriched through a closed anaerobic cylindrical device, and a deposit-WTRs mixture with the wet-to-dry weight ratio of 10:1 is added to synthetic water rich in ammonia nitrogen and is enriched for a period of time to obtain a deposit containing high activity and high abundance anaerobic ammoxidation bacteria. The purposes comprise the stimulation of the in situ environment of the deposit in eutrophic water and the provision of much interception indication for the anaerobic ammoxidation bacteria by using the large specific surface area of the WTRs as a carrier. The WTRs contain a large amount of iron, can weaken the inhibition effect of P, heavy metals and other substances in the deposit on the anaerobic ammoxidation effect, and provide suitable living environment for the anaerobic ammoxidation bacteria. The method ahs the advantages of low cost of the used materials, environmental protection, simple technological operation, solving of the treatment problem of the WTRs, realization of the effective control of endogenous release of the eutrophic water, and 'using waste to treat waste' purpose realization facilitation.
Description
Technical field
The invention belongs to water treatment field, or environmental engineering, or environmental microorganism.Be specially a kind of method utilizing water purification plant's waste sludge strengthening settling Anammox effect.
Background technology
The water pollution situation of China is serious, and the water ecological environments such as most river, lake, wetland are subject to the threat of eutrophication, and wherein, especially too high with ammonia-nitrogen content is one of the most serious problem.Ammonia and nitrogen pollution source comprises external source and pollutes and enter and discharge with endogenous pollution.External source pollutes the discharge usually comprising water surrounding periphery point source and pollution of area source.Along with water environment protection consciousness and the enhancing of regulation, external source is polluted and is effectively controlled, and the treatment process polluted of external source and the many maturations of technique.Endogenous pollution administers the important and difficult issues becoming and control body eutrophication.The Biochemical processes of the participation denitrogenation found in natural water, most importantly denitrification and Anammox effect.Wherein, Anammox effect is not owing to producing greenhouse gases N
2o, can remove oxynitride pollutant simultaneously, and obtains increasing concern and attention.In addition, due to there is obvious redox potential gradient between settling and overlying water or dissolved oxygen concentration poor, good habitat can be provided for anaerobic ammonium oxidizing bacteria.Therefore, improve the habitat of deposit surface anaerobic ammonium oxidizing bacteria, strengthen Anammox effect, there is important application value.
The key constraints of Anammox effect is that the doubling time of bacterium is long and high to the requirement in habitat.The requirement of anaerobic ammonium oxidizing bacteria to dissolved oxygen and oxidation-reduction potential is higher, and under anaerobism and anoxia condition, anaerobic ammonium oxidizing bacteria is active strong, and under micro-aerobic condition, its activity is subject to reversible inhibition, but under long-term aerobic condition, its activity can produce irreversible forfeiture.Anammox acts on the restraining effect being subject to phosphoric acid salt, heavy metal and hydrogen sulfide in varying degrees, and Fe (III) is within the scope of finite concentration, can strengthen Anammox effect.According to the effect characteristics of these factors to Anammox effect, at present, many investigators are enrichment anaerobic ammonia oxidizing bacteria from environmental sample or mud, builds bio-reactor, for sewage disposal.There is investigator to utilize admixture to provide bacterium suitable growth environment, but be mostly that the method adopting immobilization material to mix with anaerobic ammonium oxidation sludge is fixed, and need the activation culture in 1-2 week before dropping into reactor and using.As: Application Number (patent) CN201110029355.X discloses ~ kind to utilize the method for gac fixed effect strengthened anaerobic ammoxidation microorganism active, immobilization material gac is first by a series of pre-treatment, as acid-alkali treatment, go dust, salt acid soak, clear water flushing, soaking with sodium hydroxide, tap water distilled water flushing, physiological saline soak and dry, utilize its three-dimensional loose shape vesicular structure to provide microenvironment for anaerobic ammonia oxidation microbiological.Similar also has Application Number (patent) CN201110029658.1, it discloses a kind of method utilizing polyvinyl alcohol-sodium alginate-gac embedding strengthened anaerobic ammoxidation microorganism active.Application Number (patent) 201110266476.6 publication No. CN102336472A discloses a kind of electricity and strengthens denitrification of anaerobic ammonium oxidation method, utilize iron-graphite electrode extra electric field, the release of regulation and control iron, for anaerobic ammonia oxidizing bacteria provides enough ferrous substrates, promote Anammox bacteria growing.Have investigator to adopt inoculation anaerobic ammonium oxidizing bacteria in anaerobic biological reactor system, carry out the method for Enrichment of bacteria, majority thinks that microorganism provides more for the purpose of long residence time.As: Application Number (patent) CN200410042793 discloses a kind of method utilizing mixing sludge to cultivate anaerobic ammonium oxidation granular sludge.Application Number (patent) CN201010153704.4 discloses a kind of in upwards flow reactor (UASB); utilize the mixing sludge of inactivation methane phase granule sludge and Anammox floc sludge, realize the method for anaerobic ammonium oxidation granulation.Application Number (patent) CN200710164839.9 discloses a kind of device utilizing upwelling three-phase separator device efficiently concentrating anaerobic ammonia oxidizing bacteria.Application Number (patent) CN200910155264.3 (utility application number 200920202098.3 and Authorization Notice No. CN201620166U) discloses a kind of soil anaerobic ammonia oxidation enrichment system of simulating natural environment.
WTRs is a kind of safe waste in water treatment plant, is rich in Fe/A1.These Fe/A1 mainly exist with amorphous state, make WTRs have larger specific surface area, and have good adsorptive power to various material.Moreover, WTRs all has good crystallized ability to P active in settling and metal.Based on this, we think and to be mixed with settling by WTRs, contribute to improving the habitat of anaerobic ammonium oxidizing bacteria in settling, can eliminate the retardation of growth of anaerobic ammonium oxidizing bacteria in Sediment Water Interface, and then Anammox effect in enhanced deposition thing.
Summary of the invention
The invention provides the method for the enhancing eutrophic water deposit Anammox effect that one is carrier with water purification plant's waste sludge (WTRs).
The present invention, by column experiment enrichment settling and WTRs, then, carries out enrichment to the synthetic water that settling-WTRs mixture adds ammonia nitrogen abundant.Object is the original position microenvironment of simulation fresh water environment settling eutrophication.Concrete technical scheme is as follows:
1) fresh WTRs dried naturally and sieve;
2) according to a certain percentage, by step 1) in WTRs and settling Homogeneous phase mixing;
3) by step 2) in mixture be filled into a column enriching apparatus;
4) in bottom-up mode, regularly to step 3) in the device supply nutritive medium that is rich in ammonia nitrogen cultivate.
Advantage of the present invention and beneficial effect are embodied in:
1) raw material of the present invention is water purification plant's waste sludge, belongs to the safe disposal thing of water purification plant, has the advantage easily obtained;
2) operating process of the present invention is simple;
3) the present invention utilizes the own characteristic of water purification plant's waste sludge, improves anaerobic ammonium oxidizing bacteria habitat, enhances Anammox effect in settling;
4) the present invention utilizes water purification plant's waste sludge, is conducive to the doulbe-sides' victory effect realizing " treatment of wastes with processes of wastes against one another ".
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part.Schematic description and description of the present invention, for explaining the present invention, is not formed improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is that the cylindrical reactor (adding the settling after WTRs enrichment) in the embodiment of the present invention is intake and the dissolved oxygen content of water outlet changes.
Fig. 2 is the content of active phosphorus and As (III) in settling before and after the enrichment in the embodiment of the present invention.
Fig. 3 is fluorescence in situ hybridization (FISH) figure in the settling in the embodiment of the present invention before and after anaerobic ammonium oxidizing bacteria enrichment.
Fig. 4 is the Plantago fengdouensis in the settling in the embodiment of the present invention before and after anaerobic ammonium oxidizing bacteria enrichment.
Fig. 5 is the activity change in the settling in the embodiment of the present invention before and after anaerobic ammonium oxidizing bacteria enrichment.
embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Example one: with the waste sludge of water purification plant of Beijing (WTRs) for raw material, in this waste sludge, the content of iron and aluminium is respectively 150 and 100mg g
-1.Water purification plant's waste sludge, after naturally drying, crosses 100 mesh sieves.Get North China eutrophic lake settling 100g, WTRs Homogeneous phase mixing above-mentioned with 5g, the latter's dosage is 10% of the former dry weight; Mixture is added into (internal diameter: 50mm in a pillar; Post is high: 100mm), bottom and the top of pillar are all lined with nylon mesh, prevent settling from flowing out.In addition, in second pillar, enrichment is carried out to the settling not adding WTRs, and with this as control group.Only add WTRs in 3rd pillar and carry out enrichment, and with this as blank.For ensureing that system is in anaerobic state, remove outside water-in and water outlet, whole pillar is all in sealing state, and uses the N that exposed to the sun
2deionized water configuration water inlet.Adopt mode from the bottom up to intake, the flow velocity of water inlet is 200mLday
-1, pH value is 8, and initial p O
4 3+, NH
4 +, NO
2 -and NO
3 -concentration is respectively 1.5mM, 3.6mM, 0.6mM and 1.0mM, measures NH in water outlet every 3 days
4 +, NO
2 -and NO
3 -concentration.Cylindrical reactor reaches the object of Anammox effect in enhanced deposition thing through 50-80d enrichment.
The change of anaerobism microenvironment: dissolved oxygen monitoring result shows (Fig. 1), owing to adopting intermittent type to expose to the sun the mode of nitrogen, in water inlet water body, dissolved oxygen content maintains lower level all the time, is in 0.5mg L
-1below.And cylindrical reactor (adding the settling after WTRs enrichment) water outlet only occurs higher than 0.2mg L at initial operating stage,
-1situation, dissolved oxygen content is almost nil the phase after operation.In settling, the analytical results of active phosphorus and As (III) shows that (Fig. 2) is after enrichment, in the settling adding WTRs, the content of active phosphorus and As (III) is starkly lower than the content do not added in WTRs enrichment settling, and lower than the content in in-situ deposition thing.Therefore, WTRs contributes to improving settling microenvironment, makes the growth of its more suitable anaerobic ammonium oxidizing bacteria.
The determination of anaerobic ammonium oxidizing bacteria distribution: fluorescence in-situ hybridization method (FISH) result shows (Fig. 3), in the settling before and after enrichment experiment, the existence form of anaerobic ammonia oxidizing bacteria is different.In in-situ deposition thing, anaerobic ammonium oxidizing bacteria mainly exists with the form of dispersion, and after enrichment in settling anaerobic ammonium oxidizing bacteria exist in the mode of more assembling, and this agglomerate form is more obvious in containing the settling after WTRs enrichment.
Example two: same with the waste sludge of water purification plant of Beijing (WTRs) for raw material, this waste sludge after naturally drying, mistake 100 mesh sieves.Get North China high ammonia and nitrogen pollution fluvial deposit 80g, WTRs Homogeneous phase mixing above-mentioned with 5g, the latter's dosage is 10% of the former dry weight; Mixture is added into (internal diameter: 50mm in a pillar; Post is high: 100mm), bottom and the top of pillar are all lined with nylon mesh, prevent settling from flowing out.In addition, in second pillar, enrichment is carried out to the settling not adding WTRs, and with this as control group.For ensureing that system is in anaerobic state, remove outside water-in and water outlet, whole pillar is all in sealing state, and uses the N that exposed to the sun
2deionized water configuration water inlet.Adopt mode from the bottom up to intake, the flow velocity of water inlet is 200mL day
-1, pH value is 8, and initial NH
4 +, NO
2 -and NO
3 -concentration is respectively 10.0mM, 3.0mM and 5.0mM, measures NH in water outlet every 3 days
4 +, NO
2 -and NO
3 -concentration.Cylindrical reactor reaches the object of Anammox effect in enhanced deposition thing through 90-150d enrichment.
The determination of anaerobic ammonium oxidizing bacteria abundance: quantitative PCR result shows (Fig. 4), in primary deposit thing, the abundance of anaerobic ammonium oxidizing bacteria is 5.9 × 10
7copiesg
-1, after enrichment experiment, the abundance of anaerobic ammonia oxidizing bacteria has brought up to 8.9 × 10 in not containing the settling of WTRs
7copies g
-1, in containing the settling of WTRs, bring up to 1.4 × 10
8copies g
-1.Therefore, WTRs improves settling microenvironment, thus improves activity and the abundance of anaerobic ammonium oxidizing bacteria in settling.
The determination of anaerobic ammonium oxidizing bacteria activity:
15n isotopic tracing experimental result shows (Fig. 5), is higher than not containing the settling of WTRs, after this species diversity is especially embodied in the 48h of isotopic tracing experiment containing Anammox action activity in settling after the enrichment of WTRs.Test result shows, after enrichment experiment, anaerobic ammoxidation activity is by the 1.9nmol N g of primary deposit thing
-1h
-1, bring up to 6.1nmol N g respectively
-1h
-1(after not adding WTRs enrichment) and 9.2nmol N g
-1h
-1(after adding WTRs enrichment).
It is emphasized that; although above-described embodiment to be contrasted detailed description to the present invention, these illustrate just illustrative to the present invention, instead of the restriction to invention; any innovation and creation do not exceeded in connotation of the present invention, all drop within rights protection scope of the present invention.
Claims (5)
1. utilize the method for water purification plant waste sludge WTRs enhanced deposition thing Anammox effect, its know-why is as follows: exist on the basis of anaerobic ammonium oxidizing bacteria in eutrophic water deposit, utilize the microenvironment feature (as dissolved oxygen gradient) of Sediment Interface, in conjunction with the adsorpting characteristic of WTRs (as larger specific surface area, containing a large amount of iron), for anaerobic ammonium oxidizing bacteria provides larger more habitat, utilize WTRs to have many kinds of substance simultaneously and adsorb crystallized ability preferably, reduce and weaken sulphur in settling, the materials such as phosphorus to Anammox effect the restraining effect that rises.Finally reach the retardation of growth eliminating anaerobic ammonium oxidizing bacteria in Sediment Water Interface, the object of Anammox effect in enhanced deposition thing.
2. WTRs according to claim 1 strengthens the method for Anammox effect, it is characterized in that containing anaerobic ammonium oxidizing bacteria in settling, there is a large amount of ammonia nitrogen in environment water, and the existence of adjoint oxynitride.
3. WTRs according to claim 1 strengthens the method for Anammox effect, it is characterized in that in WTRs containing a large amount of Fe/A1 materials.
4. WTRs according to claim 1 strengthens the method for Anammox effect, it is characterized in that in the settling mixture of enrichment, and the dry weight ratio of settling and water purification plant's waste sludge is at 10:1.
5. the method for enhancing Anammox according to claim 1 effect, is characterized in that enriching apparatus sealing and anaerobic.
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Cited By (3)
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| CN105084552A (en) * | 2015-07-31 | 2015-11-25 | 北京师范大学 | Method for enhancing aerobiotic ammonia oxidizing bacterium gathering through N-acylated homoserine lactones |
| CN108499514A (en) * | 2018-04-10 | 2018-09-07 | 中国科学院南京地理与湖泊研究所 | A kind of phosphorus adsorbent and preparation method thereof based on water supply plant iron aluminium mud |
| CN113493245A (en) * | 2021-05-06 | 2021-10-12 | 北京工业大学 | Method for culturing anaerobic ammonia oxidation granular sludge with vivianite core |
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| CN113493245B (en) * | 2021-05-06 | 2022-11-22 | 北京工业大学 | Method for culturing anaerobic ammonia oxidation granular sludge with vivianite core |
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