CN108658226B - Composite carrier capable of promoting short-cut nitrification starting and stable operation and preparation method thereof - Google Patents
Composite carrier capable of promoting short-cut nitrification starting and stable operation and preparation method thereof Download PDFInfo
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- CN108658226B CN108658226B CN201810467630.8A CN201810467630A CN108658226B CN 108658226 B CN108658226 B CN 108658226B CN 201810467630 A CN201810467630 A CN 201810467630A CN 108658226 B CN108658226 B CN 108658226B
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
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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
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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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Abstract
The invention relates to a composite carrier capable of promoting the start and stable operation of short-cut nitrification and a manufacturing method thereof. The filler shell is made of a high polymer material easy for microorganism adhesion, consists of two hemispheres and is fixed into a complete ball through a buckle. The filling granular filler is a filler which can selectively adsorb ammonia nitrogen and is harmless to microorganisms. The prepared composite carrier is added in the biological denitrification process, the aeration quantity and the sludge age are adjusted, nitrifying bacteria can be elutriated through sludge discharge, nitrosobacteria are reserved, and the starting and the stable operation of the short-cut nitrification are realized. Aiming at the problems of the existing biological denitrification process, the invention provides a composite carrier which is simple in body preparation, obvious in effect, low in carbon, environment-friendly and economical, and a preparation method, and can promote the start and stable operation of short-cut nitrification.
Description
Technical Field
The invention relates to a microbial carrier used in the field of sewage treatment in the environmental protection industry, in particular to a composite carrier for short-cut nitrification and a preparation method thereof.
Background
The biomembrane method is one of the important technologies for wastewater treatment, and has high treatment efficiency and strong anti-interference capability. The core of the biofilm method is the manufacture and addition of a microorganism carrier, and microorganisms are attached and combined with each other on the surface of the carrier to form a biofilm. Different carriers can enhance the removal of different pollutants in water, for example, a biological filler structure disclosed in application publication No. CN104843855A, and the inside of the filler forms an anaerobic/anoxic environment, which can improve the removal effect of nitrogen and phosphorus in water.
However, there are few reports on related carriers of short-cut nitrification, which is a basic process in the current research hotspot autotrophic nitrogen removal process. The starting and stable operation of the shortcut nitrification have been difficult and limiting factors in the autotrophic nitrogen removal process. The main purpose of short-cut nitrification is to promote nitrosobacteria to inhibit the growth of nitrobacteria, while the traditional carrier has no selectivity on the attachment of microorganisms, and various microorganisms such as nitrosobacteria, nitrobacteria, denitrifying bacteria and the like can be adhered to the surface of the carrier, so that a plurality of adverse factors exist on the start of the short-cut nitrification, and the start and the stable operation of the short-cut nitrification process are influenced. How to develop a carrier with selectively attached microorganisms suitable for the short-cut nitrification process is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a composite carrier for sewage treatment, which can promote nitrosobacteria to inhibit nitrobacteria from growing so as to promote the start and stable operation of short-cut nitrification.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a composite carrier for promoting the start and stable operation of short-range nitration is composed of external filler shell, internal supporting filler, granular filler and floating filler.
The external filler shell is porous spherical, is made of high polymer materials which are easy to adhere to microorganisms, such as net polyethylene, polypropylene, polyvinyl chloride, polymethyl acrylate or polystyrene, and consists of two hemispheres which are fixed into a complete ball through a buckle and used for wrapping the internal filler and adhering microorganisms.
The internal supporting filler is a spherical polyhedron and is made of polyethylene, polypropylene, polyvinyl chloride, polymethyl acrylate or polystyrene polymer materials which are easy to adhere to microorganisms, and the internal supporting filler comprises a filler groove for placing granular fillers and floating body fillers.
The granular filler is a filler which can selectively adsorb ammonia nitrogen and is harmless to microorganisms, the particle size is larger than the pore diameter of the external reticular filler shell, and the density is larger than or equal to water.
The filling granular filler is made of montmorillonite, medical stone or zeolite material.
The floating body filler is block filler made of foam and other materials harmless to microorganisms, the particle size of the floating body filler is larger than the pore size of the external reticular filler shell, and the density of the floating body filler is smaller than that of water, so that the floating body filler is used for adjusting the suspension and floating state of the composite carrier in the water.
The foam is modified polyurethane foam, polyethylene foam or polyvinyl chloride foam.
The invention also provides a method for manufacturing and using the composite carrier capable of promoting the start and stable operation of the short-cut nitrification, which comprises the following specific steps:
(1) the preparation method comprises the following steps:
1) granular fillers and floating body fillers with proper particle sizes and capable of selectively adsorbing ammonia nitrogen are placed in a filler groove of an upper hemispherical part of an internal support filler, the placing amount of various fillers can be determined according to the suspension or floating state of the composite carrier, and the placing position can be determined according to the motion state of the composite carrier;
2) a hemisphere cover of the external packing shell is internally supported on a hemisphere filled with packing, and then the hemisphere cover is turned over to enable the hemisphere part not filled with the packing to face upwards;
3) placing a particle filler and a floating body filler with proper particle sizes and capable of selectively adsorbing ammonia nitrogen into a filler groove without the filler, wherein the specific requirements are the same as that in the step 1);
4) after filling, the other half of the external filling shell is covered with the hemisphere and is clamped with the buckle of the former half of the external filling shell, so that the composite carrier which can promote the start and the stable operation of the short-cut nitrification can be manufactured;
5) repeating the steps 1) to 4) to prepare more composite carriers.
The composite carrier is used for the short-cut nitrification process, can ensure the start and the stable operation of the short-cut nitrification, and has the following advantages:
(1) montmorillonite, medical stone or zeolite filler capable of selectively adsorbing ammonia nitrogen is filled in the sewage treatment device, a microenvironment with high ammonia nitrogen concentration can be formed around the filler, the growth of nitrosobacteria is promoted, the growth of nitrobacteria is inhibited, and the effect is more obvious particularly when town sewage with low ammonia nitrogen concentration is treated.
(2) The granular fillers are placed in the lattices of the spherical fillers and are uniformly distributed, so that the contact area of the granular fillers and ammonia nitrogen in water can be increased, and a high ammonia nitrogen microenvironment can be formed.
(3) The proportion and the placement position of the granular fillers and the floating body fillers can be adjusted according to requirements, so that the requirements of the composite carrier on suspension, floating, 360-degree overturning, horizontal overturning and the like in water can be met.
In a word, the composite carrier capable of promoting the start and the stable operation of the short-cut nitrification is simple to manufacture, has obvious effect, is a low-carbon, environment-friendly and economic method capable of promoting the short-cut nitrification, and has higher application value and development potential.
Drawings
FIG. 1-composite Carrier outer Filler Shell plan view
FIG. 2-top view of the outer packing shell of the composite carrier
FIG. 3-composite Carrier internal support Filler plan view
FIG. 4-top view of the internal support packing of the composite Carrier
FIG. 5-composite Carrier internal support Filler perspective view
FIG. 6-composite carrier internal support packing after addition of particulate packing and floating body packing
FIG. 7-the composite carrier after completion of fabrication.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, the composite carrier for promoting the start and stable operation of shortcut nitrification according to the present invention comprises: 1, an external packing shell, 1-1 hemisphere and 1-2 buckle; 2, supporting filler inside and 2-1 filler groove; 3 granular packing capable of selectively adsorbing ammonia nitrogen; 4 floating body stuffing.
The preparation steps of the carrier are as follows:
1) preparing an external filler shell 1 and an internal supporting filler 2 of a composite filler with the diameter of 2-10cm, preferably selecting a filler with the diameter of 2-3cm in the embodiment, wherein the diameter of a pore on the external filler shell is 1mm, placing montmorillonite particles or zeolite particles 3 with the particle size of 1.5-3mm and capable of selectively adsorbing ammonia nitrogen and floating filler modified polyurethane foam 4 into a filler groove 2-1 in an upper hemispherical part of the internal supporting filler 2, wherein the placing amount of various fillers can be determined according to the suspension or floating state of a composite carrier, ensuring that the composite filler can be suspended in the middle of sewage, and determining the placing position according to the motion state of the composite carrier;
2) covering a hemisphere 1-1 of an external packing shell 1 on a hemisphere with an internal supporting packing 2 filled with the packing, and turning over the hemisphere to enable the hemisphere part without the packing to be upward;
3) placing montmorillonite or zeolite particle filler 3 with proper particle size and capable of selectively adsorbing ammonia nitrogen and modified polyurethane floating body filler 4 into a filler groove 2-1 without filler, wherein the specific requirements are the same as the step 1);
4) after filling, covering the other half of the external filling shell hemisphere 1-1, and clamping the half of the external filling shell hemisphere 1-1 with the buckle 1-2 of the previous half of the external filling shell, so that the composite carrier capable of promoting the start and the stable operation of the short-cut nitrification can be manufactured;
5) repeating the steps 1) to 4) to prepare more composite carriers.
The specific implementation scheme in the short-cut nitration process is as follows:
(1) adding the prepared composite carrier in an aerobic zone of the biological denitrification process according to the volume ratio of the composite carrier to a reaction tank of 1/4-3/5.
(2) And reducing aeration quantity to ensure that the concentration of dissolved oxygen is below 1.5mg/L, running for 15-30 days, and monitoring the concentrations of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in inlet and outlet water.
(3) The sludge age is adjusted to be about 8 days, and due to the formation of a high ammonia nitrogen microenvironment near the composite carrier, the activity of nitrosobacteria is good and easy to attach to the inside and the outside of the carrier, and the activity of nitrobacteria is inhibited and is mostly in a suspended state. Thus, the nitrifying bacteria can be elutriated by discharging the sludge, and the nitrosobacteria can be reserved.
Example 1: an 8L sequencing batch reactor is adopted, 3L of composite carrier with the diameter of 2cm is added into the reactor, the concentration of ammonia nitrogen in inlet water is 50mg/L, the operating temperature is 30 ℃, the starting of short-cut nitrification is realized within about 20 days, the accumulation rate of nitrite nitrogen in outlet water reaches more than 85 percent, and the stable operation is realized for more than 90 days.
Example 2: A5L sequencing batch reactor is adopted, 2.5L of composite carrier with the diameter of 2cm is added into the reactor, the concentration of ammonia nitrogen in inlet water is 50mg/L, the start of short-cut nitrification is realized in about 15 days at room temperature, the accumulation rate of nitrite nitrogen in outlet water reaches 88%, and the stable operation is realized for more than 60 days.
Example 3: A20L sequencing batch reactor is adopted, 10L of composite carrier with the diameter of 3cm is added into the reactor, the concentration of ammonia nitrogen in inlet water is 50mg/L, the operation temperature is 25 ℃, the starting of short-cut nitrification is realized within about 18 days, the accumulation rate of nitrite nitrogen in outlet water reaches 87%, and the stable operation is realized for more than 80 days.
Comparison 3: an 8L sequencing batch reactor is adopted, activated carbon filler with the diameter of 2cm is added into the reactor, the concentration of ammonia nitrogen in inlet water is 50mg/L, the operating temperature is 25 ℃, the start of short-cut nitrification is realized within about 25 days, the accumulation rate of nitrite nitrogen in outlet water is only 73 percent at most, and the stable operation is less than 40 days.
From the above test results, it is apparent that the composite filler of examples 1 to 3 of the present invention has an excellent accelerating effect on the start-up and stable operation of the short-cut nitrification process, which depends on the use of the composite filler of a specific structure, and zeolite and montmorillonite fillers which can selectively absorb ammonia nitrogen therein, and also adjusts the floating degree of the filler in water, thereby achieving the optimum state of contact reaction with sewage.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A composite carrier capable of promoting the start and stable operation of short-cut nitrification is characterized in that: the device consists of a filler shell, an internal supporting filler, a filling granular filler and a floating body filler from outside to inside; the internal supporting filler is a spherical polyhedron and is made of high polymer materials easy for microorganism attachment, a filler groove is formed in the internal supporting filler and is used for placing granular fillers and floating body fillers, the granular fillers and the floating body fillers are respectively filled with 2 layers and 3 layers, and the granular filler layer and the floating body filler layer are arranged at intervals; the filling granular filler is a filler which can selectively adsorb ammonia nitrogen and is harmless to microorganisms, the grain diameter is larger than the pore diameter of the external reticular filler shell, and the density is larger than or equal to water; the floating body filler is block foam filler, the particle size of the floating body filler is larger than the pore diameter of the external reticular filler shell, the density of the floating body filler is smaller than that of water, and the floating body filler is used for adjusting the suspension and floating state of the composite carrier in the water.
2. The composite carrier as claimed in claim 1, wherein the filler shell is a porous spherical structure, is made of a high molecular material easy for microorganism attachment, is composed of two hemispherical shells, and is fixed by a buckle to form a complete spherical shell for wrapping the internal filler and attaching microorganisms.
3. The composite carrier according to claim 1 or 2, wherein the polymeric material susceptible to attachment of microorganisms is selected from polyethylene, polypropylene, polyvinyl chloride, polymethyl acrylate or polystyrene.
4. The composite carrier as claimed in claim 1 or 2, wherein the filling granular filler is made of montmorillonite, medical stone or zeolite material capable of selectively absorbing ammonia nitrogen.
5. The composite carrier of claim 1 or 2 wherein the foam filler is selected from modified polyurethane foam, polyethylene foam or polyvinyl chloride foam.
6. The method for manufacturing a composite carrier according to any one of claims 1 to 5, comprising the steps of:
1) granular fillers and floating body fillers with proper particle sizes and capable of selectively adsorbing ammonia nitrogen are placed in a filler groove of an upper hemispherical part of an internal support filler, the placing amount of various fillers can be determined according to the suspension or floating state of the composite carrier, and the placing position can be determined according to the motion state of the composite carrier;
2) a hemisphere cover of the external packing shell is internally supported on a hemisphere filled with packing, and then the hemisphere cover is turned over to enable the hemisphere part not filled with the packing to face upwards;
3) placing a particle filler and a floating body filler with proper particle sizes and capable of selectively adsorbing ammonia nitrogen into a filler groove without the filler, wherein the specific requirements are the same as the step 1);
4) after filling, the other half of the external filling shell is covered with the hemisphere and is clamped with the buckle of the former half of the external filling shell, so that the composite carrier which can promote the start and the stable operation of the short-cut nitrification can be manufactured;
5) repeating the steps 1) to 4) to prepare more composite carriers.
7. A short-cut nitrification process using the composite carrier according to any one of claims 1 to 5, wherein the ratio of the volume of the composite carrier to the volume of the reaction tank is 1/4 to 3/5 in the aerobic zone for biological denitrification.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810467630.8A CN108658226B (en) | 2018-05-14 | 2018-05-14 | Composite carrier capable of promoting short-cut nitrification starting and stable operation and preparation method thereof |
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| CN201810467630.8A CN108658226B (en) | 2018-05-14 | 2018-05-14 | Composite carrier capable of promoting short-cut nitrification starting and stable operation and preparation method thereof |
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| CN108658226B true CN108658226B (en) | 2020-12-04 |
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| CN110723808B (en) * | 2019-09-30 | 2022-07-22 | 江苏大学 | Magnetic biofilm reactor based on coral sand |
| CN111847643B (en) * | 2020-07-30 | 2022-05-31 | 中生源(海南)生态环境发展有限公司 | Multifunctional filler and preparation method thereof |
| CN112897684A (en) * | 2021-01-20 | 2021-06-04 | 华南理工大学 | Method for realizing continuous flow stable nitrosation by using spherical suspension filler |
| CN113697951B (en) * | 2021-08-02 | 2022-10-18 | 北京工业大学 | Method for realizing granular sludge shortcut nitrification-anaerobic ammonia oxidation coupled endogenous denitrification nitrogen removal at low temperature |
| CN114014437B (en) * | 2021-11-09 | 2023-10-31 | 河北工程大学 | Modification method and application of double-modified combined filler for biomembrane method |
| CN115672013A (en) * | 2022-09-30 | 2023-02-03 | 浙江海洋大学 | Magnetic composite filler and preparation method thereof |
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| US6855255B2 (en) * | 2003-01-28 | 2005-02-15 | Industrial Technology Research Institute | Method for treating wastewater/water with fixed-film microorganism on porous carriers |
| CN100402444C (en) * | 2006-08-29 | 2008-07-16 | 湖南大学 | Operation mode and apparatus of short distance nitration-anaerobic ammoxidation batched biomembrane denitrogenation |
| CN203222512U (en) * | 2013-04-11 | 2013-10-02 | 浙江省环境保护科学设计研究院 | Combined biological stuffing for removing ammonia nitrogen |
| CN203498167U (en) * | 2013-09-30 | 2014-03-26 | 北京科益创新环境技术有限公司 | Microbial carrier and filler carrier |
| CN106242051A (en) * | 2016-07-31 | 2016-12-21 | 华南理工大学 | A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed |
| CN106495315A (en) * | 2016-11-19 | 2017-03-15 | 合肥创新轻质材料有限公司 | A kind of spherical suspending filling material assembled by porous polymer |
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Effective date of registration: 20221229 Address after: 101407 No. 4 south two street, Yan Qi Economic Development Zone, Huairou District, Beijing Patentee after: BEIJING ORIGIN WATER FILM TECHNOLOGY Co.,Ltd. Address before: 100094 Building 1, Cui Hunan Ring Road, Sujia Tuo Town, Haidian District, Beijing, 1 Patentee before: BEIJING INSTITUTE OF COLLABORATIVE INNOVATION Patentee before: BEIJING ORIGIN WATER FILM TECHNOLOGY Co.,Ltd. |