CN115611436A - Modified composite material and application thereof, and sewage biological treatment standard-improving and efficiency-improving method - Google Patents
Modified composite material and application thereof, and sewage biological treatment standard-improving and efficiency-improving method Download PDFInfo
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- CN115611436A CN115611436A CN202211214404.1A CN202211214404A CN115611436A CN 115611436 A CN115611436 A CN 115611436A CN 202211214404 A CN202211214404 A CN 202211214404A CN 115611436 A CN115611436 A CN 115611436A
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- 239000010865 sewage Substances 0.000 title claims abstract description 26
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Images
Classifications
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- C02F3/30—Aerobic and anaerobic processes
-
- 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
-
- 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
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
- Treatment Of Biological Wastes In General (AREA)
Abstract
The invention belongs to the technical field of biological sewage treatment, and discloses a modified composite material, application thereof and a method for improving the standard and the efficiency of biological sewage treatment. Based on the total weight of the composite material, the composite material comprises 5-40% of floc sludge cross-linking agent, 20-65% of flora in-situ regulating agent and 5-35% of autotrophic bacteria activity promoter. The modified composite material is applied to the rapid agglomeration of microorganisms with related functions in sewage treatment, and can obviously improve the treatment load of a biological tank, the sedimentation performance of suspended sludge and the like.
Description
Technical Field
The invention belongs to the technical field of biological sewage treatment, and particularly relates to a modified composite material, application thereof and a method for improving the standard and the efficiency of biological sewage treatment.
Background
Currently, the activated sludge process is still the most economical and widely used process in all sewage treatment technologies. However, with the increasing year by year of the amount of sewage, the discharge standard of sewage plants is continuously improved, and meanwhile, the requirement of the current society on sewage treatment is higher and higher, and the existing sewage treatment plants have multiple pressures of quality improvement, efficiency improvement, energy conservation and consumption reduction. The immobilized biomembrane technology and the granular sludge technology can be used for enriching autotrophic denitrogenation bacteria such as anaerobic ammonium oxidation bacteria and nitrobacteria, and microorganisms with longer generation period such as denitrifying phosphorus-accumulating bacteria and phosphorus-accumulating bacteria, and can obviously improve the biomass of the biological pond and further improve the biochemical treatment efficiency. However, the immobilized filler has the problems of small specific surface area, high installation and transportation cost, difficult aggregation of granular sludge, easy disintegration, unstable operation and the like.
Disclosure of Invention
The invention aims to provide a modified composite material, application thereof and a method for improving the standard and the efficiency of biological sewage treatment aiming at the defects of the prior art. The modified composite material is applied to the rapid agglomeration of the microorganisms with related functions in sewage treatment, and can obviously improve the treatment load of a biological tank, the sedimentation performance of suspended sludge and the like.
In order to achieve the above object, the first aspect of the present invention provides a modified composite material, which comprises 5% -40% of floc sludge cross-linking agent, 20% -65% of flora in-situ regulator and 5% -35% of autotrophic bacteria activity promoter, based on the total weight of the composite material.
In the invention, the modified composite material can be synchronously configured and added on site, and is placed in a cool and dry place during storage and transportation, so that the modified composite material is not suitable for contacting with alkaline substances, and the storage period is not suitable for exceeding 90 days at normal temperature.
According to the present invention, preferably, the floc sludge cross-linking agent is at least one of chitosan, chitosan oligosaccharide and chitosan.
According to the present invention, preferably, the flora in situ modulator is a hydroxylamine salt and/or a hydrazine salt.
According to the present invention, preferably, the autotrophic bacteria activity promoting agent is at least one of a ferrous salt, graphene oxide and tourmaline powder.
The second aspect of the invention provides the application of the modified composite material in the biological treatment of sewage.
According to the present invention, preferably, the biological treatment of the wastewater is denitrification.
The invention provides a method for improving the standard and the efficiency of sewage biological treatment, which comprises the following steps:
s1: mixing the floc sludge crosslinking agent with a solvent to form a solution system;
s2: mixing the flora in-situ regulating agent and the autotrophic bacteria activity promoter with the solution system to form a mixed solution of a modified composite material;
s3: adjusting the concentration of the activated sludge, adding a medicament into the activated sludge, and stirring to form an activated sludge medicament mixing system;
s4: and (2) adding the mixed solution (corresponding to the mixed solution form in the figure 4) of the modified composite material obtained in the step (S2) into the activated sludge medicament mixing system obtained in the step (S3) and stirring, or adding the solution system obtained in the step (S1), the flora in-situ regulating agent and the autotrophic bacteria activity promoter (corresponding to the dry powder form mixing in the figure 4) into the activated sludge medicament mixing system obtained in the step (S3) and stirring.
According to the present invention, preferably, in step S1, the solvent is an aqueous solution of formic acid with a mass concentration of 0.5% to 1.5% and/or an aqueous solution of acetic acid with a mass concentration of 0.5% to 1.5%.
According to the present invention, preferably, in step S3,
adjusting the concentration of the activated sludge to be 5000-20000 mg/L;
the medicament is at least one of a solution system, a flora in-situ regulating agent and an autotrophic bacteria activity promoter in the step S1;
the concentration of the medicament is 1-10 mg/L;
the feeding area is an aerobic area and/or an anaerobic area;
the stirring is mechanical stirring and/or aeration stirring, and preferably, the dissolved oxygen of the aeration stirring is 0.5-3.0 mg/L.
In the invention, the concentration of the activated sludge is generally 3000-5000 mg/L in the treatment process, the concentration of the activated sludge is adjusted to 5000-20000 mg/L by the inventor through the sludge concentration means known by the technical personnel in the field, and the invention aims to save the use amount of the floc sludge cross-linking agent, the flora in-situ regulating agent and the autotrophic bacteria activity promoter, so that the floc sludge cross-linking agent can fully exert the effect without waste.
According to the present invention, it is preferable that, in step S4,
the total adding amount of the modified composite material in the step S4 is 0.01-0.25 g/g relative to the solid content of the activated sludge adjusted in the step S3;
the adding mode is continuous adding;
the feeding area is an aerobic area and/or an anaerobic area;
the stirring is mechanical stirring and/or aeration stirring, and preferably, the dissolved oxygen of the aeration stirring is 0.5-3.0 mg/L.
According to the present invention, preferably, the method further comprises the steps of discharging the activated sludge treated in step S4, retaining the high density microorganism aggregates, and returning the high density microorganism aggregates to the biological pond.
In the invention, at least one of chitosan, chitosan oligosaccharide and chitosan is selected, the cation density and porosity of the chitosan, chitosan oligosaccharide and chitosan are used as floc sludge cross-linking agents, and active suspended sludge, a flora in-situ regulator and an autotrophic bacteria activity promoter are coagulated into a microorganism dense aggregate in a dry powder (or solution) mixing and stirring mode. The flora in-situ regulating agent and the autotrophic bacteria activity promoter provided by the invention have the main functions of: the biomass and settleability of the biological pond can be effectively improved; meanwhile, the retention of denitrification functional bacteria with longer generation period in the water treatment system is facilitated; the structure of the flora can be adjusted for a long time, and the autotrophic denitrification rate of a water treatment biological system is improved; and finally, energy conservation and consumption reduction of the regenerated water plant are promoted. Specifically, the method comprises the following steps: the modified composite material added to the aeration or non-aeration area is fully mixed with the floc sludge, is in a suspension state, and has enhanced agglomeration effect under the action of a floc sludge cross-linking agent. The flora in-situ regulating agent and the autotrophic bacteria activity promoter can enter the zoogloea, and soluble substances contained in the zoogloea can be slowly released, so that the flora structure can be directionally regulated, and the enrichment in the microorganism aggregators of the shortcut nitrifying bacteria and the anaerobic ammonium oxidation bacteria can be continuously and effectively promoted.
The technical scheme of the invention has the following beneficial effects:
1) The invention can obviously improve the biomass and the biodiversity in the biological pond: the floc sludge can be coagulated into aggregates, more microorganisms with longer generation period are enriched, and the biomass of the biological pond is obviously improved by 50-300%.
2) The invention can obviously improve the treatment load of the biological pond: the invention can obviously improve the denitrification autotrophic bacteria such as ammonia nitrogen oxidizing bacteria, anaerobic ammonium oxidation bacteria and the like in the biological tank and improve the denitrification efficiency of the biological tank to 85-98 percent.
3) The invention can obviously improve the sedimentation performance of the suspended sludge: the invention can effectively improve the specific gravity of the sludge, can realize the quick separation of mud and water in the sedimentation tank, reduces the height of a mud layer of the secondary sedimentation tank and improves the stable operation performance of the secondary sedimentation tank.
4) The invention is generally applied to the rapid upgrading and reconstruction of various sewage biological treatment processes. The invention is suitable for various current sewage biological treatment processes, considers the high-efficiency retention of the micro filler, and is particularly suitable for sequencing batch bioreactors and membrane bioreactors.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 is a schematic diagram showing sludge obtained by biological sewage treatment using a modified composite material in example 1 of the present invention.
FIG. 2 is a graph showing the results of the microorganism test of sludge-enriched autotrophic bacteria after the biological treatment of sewage by using the modified composite material of example 1 of the present invention (wherein: unclassified represents unclassified, canidans Brocadia represents anaerobic ammonia-oxidizing Blockeria, canidans Kuenenia represents anaerobic ammonia-oxidizing 22546Nihonia, nitrosomonas represents Nitrosomonas, nitrospira represents Nitrospira, litorineaa represents Lithollylin, ignavibacter represents Pyrobaculum, gemmatimonas represents Germinomonas, rubivivax represents erythromycin, aquiphora represents algae, owenweeksia represents Vibrio, dokdonella represents Dukronella, nitrietvitor represents nitrile degrading bacteria, denitia represents complete denitrifying bacteria, acanthoeuribacter represents Shiratula, latrovula represents Rockura, and Thielandinean represents the Relative abundance of Thindavia, and Other related microorganisms represented by Thiadiantum and Rendaurus).
FIG. 3 is a graph showing the test results of effluent quality after biological sewage treatment using the modified composite material in example 1 of the present invention (wherein TN represents total nitrogen).
FIG. 4 is a schematic flow chart of the wastewater biological treatment scaling and efficiency improvement method of the invention.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Examples
The embodiment provides a modified composite material, which comprises chitosan, hydroxylamine hydrochloride and ferrous sulfate, wherein the mass ratio of the chitosan to the hydroxylamine hydrochloride to the ferrous sulfate is 1.
As shown in fig. 4, the method for improving the standard and the efficiency of the biological sewage treatment by using the modified composite material comprises the following steps:
s1: mixing chitosan with 1% formic acid water solution to form a solution system;
s2: mixing hydroxylamine hydrochloride and ferrous sulfate with the solution system to form a mixed solution of the modified composite material;
step S1-S2, the mass ratio of chitosan to hydroxylamine hydrochloride to ferrous sulfate is 1;
s3: adjusting the concentration of activated sludge in a biological tank to 8000-14000 mg/L, adding hydroxylamine hydrochloride into the biological tank, aerating and stirring, wherein the dissolved oxygen is 0.5-3.0 mg/L, and the concentration of the hydroxylamine hydrochloride is 2.0mg/L to form an activated sludge medicament mixing system;
s4: and (3) adding the mixed liquid of the modified composite material obtained in the step (S2) into the activated sludge medicament mixing system obtained in the step (S3), carrying out aeration stirring, dissolving oxygen by 0.5-3.0 mg/L, and continuously adding the modified composite material obtained in the step (S4) for 24 hours, wherein the total adding amount of the modified composite material is 0.1g/g relative to the solid content of the activated sludge in the biological tank regulated in the step (S3).
FIG. 1 is a schematic diagram showing sludge obtained by biological treatment of sewage using the modified composite material according to this example.
FIG. 2 is a graph showing the results of testing sludge-enriched autotrophic microorganisms after the biological treatment of sewage using the modified composite material according to the present embodiment.
FIG. 3 is a graph showing the test results of the effluent quality after the modified composite material is used for biological sewage treatment in the embodiment (wherein TN represents total nitrogen).
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The modified composite material is characterized by comprising 5-40% of floc sludge cross-linking agent, 20-65% of flora in-situ regulator and 5-35% of autotrophic bacteria activity promoter by weight of the total composite material.
2. The modified composite material of claim 1, wherein the floc sludge cross-linking agent is at least one of chitosan, chitooligosaccharide, and chitosan.
3. The modified composite material according to claim 1,
the flora in-situ regulator is hydroxylamine salt and/or hydrazine salt;
the autotrophic bacteria activity promoter is at least one of ferrous salt, graphene oxide and tourmaline powder.
4. Use of the modified composite material according to any one of claims 1 to 3 in the biological treatment of wastewater.
5. The use of claim 4, wherein the biological wastewater treatment is denitrification.
6. A method for improving the standard and the efficiency of sewage biological treatment is characterized by comprising the following steps:
s1: mixing the floc sludge crosslinking agent with a solvent to form a solution system;
s2: mixing the flora in-situ regulating agent and the autotrophic bacteria activity promoter with the solution system to form a mixed solution of the modified composite material;
s3: adjusting the concentration of activated sludge, adding a medicament into the activated sludge, and stirring to form an activated sludge medicament mixing system;
s4: and (3) adding the mixed liquid of the modified composite material in the step (S2) into the activated sludge medicament mixing system in the step (S3) and stirring, or adding the solution system in the step (S1), the flora in-situ regulating agent and the autotrophic bacteria activity promoter into the activated sludge medicament mixing system in the step (S3) and stirring.
7. The method for improving the wastewater biological treatment standard according to claim 6, wherein in step S1, the solvent is a formic acid aqueous solution with a mass concentration of 0.5-1.5% and/or an acetic acid aqueous solution with a mass concentration of 0.5-1.5%.
8. The wastewater biological treatment standard-upgrading and efficiency-enhancing method according to claim 6, wherein, in step S3,
adjusting the concentration of the activated sludge to be 5000-20000 mg/L;
the medicament is at least one of a solution system, a flora in-situ regulating agent and an autotrophic bacteria activity promoter in the step S1;
the concentration of the medicament is 1-10 mg/L;
the feeding area is an aerobic area and/or an anaerobic area;
the stirring is mechanical stirring and/or aeration stirring, and preferably, the dissolved oxygen of the aeration stirring is 0.5-3.0 mg/L.
9. The wastewater biological treatment standard-upgrading and efficiency-enhancing method according to claim 6, wherein, in step S4,
the total adding amount of the modified composite material in the step S4 is 0.01 g-0.25 g/g relative to the solid content of the activated sludge adjusted in the step S3;
the adding mode is continuous adding;
the feeding area is an aerobic area and/or an anaerobic area;
the stirring is mechanical stirring and/or aeration stirring, and preferably, the dissolved oxygen of the aeration stirring is 0.5-3.0 mg/L.
10. The method for improving the wastewater biological treatment standard according to claim 6, wherein the method further comprises the steps of discharging sludge from the activated sludge treated in step S4, retaining high-density microorganism aggregates, and returning the high-density microorganism aggregates to the biological pond.
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| KR100712175B1 (en) * | 2007-02-02 | 2007-04-27 | 전동현 | Excess sludge reduction method using continuity circulation |
| WO2016082060A1 (en) * | 2014-11-28 | 2016-06-02 | 苏笮斌 | Tk-jh mineral interface active material, and preparation method and use method therefor |
| CN113788528A (en) * | 2021-09-13 | 2021-12-14 | 北京城市排水集团有限责任公司 | Water treatment micro filler and preparation method thereof |
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