CN113955871A - High ammonia nitrogen and high carbonate's effluent disposal system - Google Patents

High ammonia nitrogen and high carbonate's effluent disposal system Download PDF

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Publication number
CN113955871A
CN113955871A CN202011435548.0A CN202011435548A CN113955871A CN 113955871 A CN113955871 A CN 113955871A CN 202011435548 A CN202011435548 A CN 202011435548A CN 113955871 A CN113955871 A CN 113955871A
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ammonia nitrogen
membrane module
treatment system
wastewater treatment
wastewater
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臧立新
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention relates to a high ammonia nitrogen and high carbonate wastewater treatment system, which comprises: the device comprises a front membrane module, a pH value control module, a degassing tower and a rear membrane module; the top of the degassing tower is provided with a spraying device, the middle part of the degassing tower is provided with a filler, and the bottom of the degassing tower is provided with a water storage device and a fan; the front membrane module is communicated with the spraying device through the pH value control module; the water storage device is communicated with the rear membrane module. The front membrane module can reduce the content of ammonia nitrogen and COD in the wastewater, and the pH value control module can adjust the pH value of the wastewater to be within a required concentration range, so that carbonate in the wastewater is basically converted into CO2(ii) a The degasser then removes most of the CO in the water2And blowing out part of the soluble gas to ensure that ammonia nitrogen in water completely exists in the form of ammonium sulfate, and then treating by a post-membrane moduleAnd then, the total removal rate of ammonia nitrogen is about 99.0-99.7%, and the ammonia nitrogen can reach the discharge standard regulated by the state, thereby being beneficial to protecting water quality and environment.

Description

High ammonia nitrogen and high carbonate's effluent disposal system
Technical Field
The invention relates to a sewage treatment system, in particular to a high ammonia nitrogen and high carbonate wastewater treatment system.
Background
The landfill leachate is high-concentration wastewater generated by landfill or stacking, the components of the garbage are complex and changeable, the property change range of the landfill leachate in each region is large, and the landfill leachate is influenced by various factors such as the types of landfills, landfill methods, the scale of landfill sites, landfill periods, weather changes and the like, and the water quality of the landfill leachate has the following characteristics:
(1) contains a large amount of carbonate compounds, such as carbon dioxide, carbonic acid, bicarbonate, carbonate and the like in a mixed state, which causes complex pollutant components and large fluctuation range of water quality;
(2) contains a large amount of ammonia nitrogen compounds;
(3) the COD and BOD concentrations are higher.
In recent years, typical treatment processes are gradually formed in landfill leachate treatment, such as anaerobic treatment, aerobic treatment, MBR treatment, NF/RO treatment, two-stage disc tube type reverse osmosis DTRO treatment, biochemical treatment, advanced oxidation treatment, filtration treatment, evaporation concentration treatment and the like, and the adopted processes are various due to the fact that the actual water quality of each leachate is different. However, in the prior art, the ammonia nitrogen is removed by using external substances, so that the production cost is greatly increased, and the removal rate of the ammonia nitrogen in the landfill leachate is low, which is not beneficial to the protection of water quality and environment.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a high ammonia nitrogen and high carbonate wastewater treatment system which can effectively utilize the principle of carbonic acid balance in water to efficiently remove ammonia nitrogen in landfill leachate, thereby better protecting water quality and environment.
According to the embodiment of the invention, the high ammonia nitrogen and high carbonate wastewater treatment system comprises: the system comprises a front membrane module, a pH value control module for adjusting the pH value of the wastewater to 2.5-5.0, a degassing tower and a rear membrane module; a spraying device is arranged at the top of the degassing tower, and a filler is arranged in the middle of the degassing tower; the bottom of the degassing tower is provided with a water storage device and a fan for reversely blowing the waste water sprayed out by the spraying device; the front membrane module is communicated with the spraying device through the pH value control module; the water storage device is communicated with the rear membrane module.
The high ammonia nitrogen and high carbonate wastewater treatment system provided by the embodiment of the invention at least has the following beneficial effects: the front membrane module can reduce the content of ammonia nitrogen and COD in the wastewater, and the pH value control module can adjust the pH value of the wastewater to the valueIn a concentration range required for the carbonate in the waste water to be substantially converted into CO2(ii) a The degasser then removes most of the CO in the water2And part of the soluble gas is blown out, so that the ammonia nitrogen in the water completely exists in the form of ammonium sulfate, and after the ammonia nitrogen is treated by the post-membrane module, the total removal rate of the ammonia nitrogen is about 99.0-99.7%, the ammonia nitrogen can reach the discharge standard specified by the state, and the ammonia nitrogen is beneficial to protecting the water quality and the environment.
According to some embodiments of the invention, the filler is a multi-faceted sphere.
According to some embodiments of the invention, the front membrane module comprises: a reverse osmosis membrane module and a nanofiltration membrane module.
According to some embodiments of the invention, the front membrane module comprises: filters, high pressure pumps and membrane modules.
According to some embodiments of the invention, the membrane module comprises: spiral wound membrane module or disc tube column type membrane module.
According to some embodiments of the invention, the pH control module comprises: the device comprises a dosing pump, a reaction box, a reaction stirring unit, a pH value controller and a dosing box.
According to some embodiments of the invention, the pH of the high ammonia nitrogen and high carbonate wastewater is controlled to be between 6.0 and 7.0 prior to entering the pre-membrane system.
According to some embodiments of the invention, further comprising: a pre-treatment module in communication with the pre-membrane module.
According to some embodiments of the invention, the pre-processing module comprises: one or more of a screen filter, a sand filter, or a surface filter.
According to some embodiments of the invention, the surface filter comprises: a core surface filter or a bag surface filter.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a block diagram of a high ammonia nitrogen and high carbonate wastewater treatment system according to the present invention.
FIG. 2 shows a block diagram of a degasser according to the present invention.
Description of reference numerals:
1-a pre-processing module; 2-a pH preconditioning unit; 3-cartridge filter; 4-a first membrane module; 5-pH value control module; 6-a degassing tower; 7-a precision filter; 8-a second membrane module; 9-a booster pump; 10-a first high pressure pump; 11-second high-pressure pump.
61-a defoaming device; 62-a spraying device; 63-polyhedral balls; 64-a fan; 65-a water storage device; 66-exhaust means.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
Referring to fig. 1, the invention discloses a high ammonia nitrogen and high carbonate wastewater treatment system, which comprises a pretreatment module 1, a pH pre-adjusting device 2, a front membrane module, a pH value control module 5, a degassing tower 6 and a rear membrane module, which are connected in sequence. Specifically, the front membrane module and the rear membrane module have similar structures and same functions, and can be arranged as a filter, a high-pressure pump and a membrane module; the front membrane module may include a cartridge filter 3, a first high-pressure pump 10, and a first membrane module 4, which are connected in sequence, and the rear membrane module may include a precision filter 7, a second high-pressure pump 11, and a second membrane module 8, which are connected in sequence. A first booster pump 9 may be provided between pH pre-conditioning apparatus 2 and cartridge filter 3, and a second booster pump 9 may be provided between degasser 6 and fine filter 7.
For example, as shown in fig. 1, the pretreatment module 1 may be configured as one or more of a mesh filter, a sand filter, or a surface filter, wherein the surface filter may be configured as a core surface filter or a bag surface filter, and the above filters are all capable of effectively removing impurities, and in addition, the filters are all the prior art, and the structure thereof is not described in this embodiment.
The pH pre-adjusting device 2 is arranged between the connection pre-treatment module 1 and the first booster pump 9 and is used for pre-adjusting the pH of the wastewater; a pH control module 5 is provided between the first membrane module 4 and the degassing tower 6 to control the pH range of the wastewater to be introduced into the degassing tower, typically to adjust the pH to 2.5 to 5.0, preferably 3.5.
Specifically, the sand filter may be a quartz sand filter having a filtering accuracy of 50 μm. The working principle of the processing system is as follows: removing solid particles from the initial wastewater stock solution by a quartz sand filter, and then adjusting the initial wastewater stock solution to a pH range of 6.0-7.0, preferably 6.5 by a pH pre-adjusting device 2 and adding sulfuric acid; then the wastewater is pumped to a security filter 3 through a first booster pump 9, the wastewater is filtered in the security filter 3, and large solid particles in the wastewater are removed; then is pumped to the first membrane component 4 by the first high-pressure pump 10, the wastewater is further filtered, and the ammonia nitrogen and COD contained in the wastewater are reduced; then the wastewater passing through the first membrane module 4 is adjusted to pH 3.5 by adding sulfuric acid through a pH value control module 5, and carbonate in the wastewater is converted into carbonic acid and then enters a degassing tower 6 along with the wastewater.
Further, referring to fig. 2, the degasser 6 has a structure of: the top of the degassing tower 6 is provided with a spraying device 62, the middle part of the degassing tower 6 is provided with a filler, and the bottom of the degassing tower 6 is provided with a fan 64 and a water storage device 65; wherein the filler may be provided as polyhedral balls 63. A foam device 61 and an exhaust device 66 may be connected to the top of the degassing tower 6.
The waste water enters the spraying device 62 of the degassing tower 6 from the top of the degassing tower 6, the waste water is uniformly sprayed inside the tower body through the spraying device and flows down through the multi-surface balls 63, and the height of the multi-surface balls 63 (phi 2.5) is about 1.8m, so that the contact area between the waste water and the filler is increased. During the process of flowing down along the degassing tower through the multifaceted ball 63, the fan 64 (model number TB125-3-B4, power is 2.2kw) at the bottom of the tower is started, and the generated airflow performs strong reverse blowing on the wastewater flowing through the multifaceted ball 63 from the bottom of the tower, thereby promoting the carbonic acid contained in the wastewater to be changed into CO2The gas is blown to the top of the tower along with the gas flow, and is discharged to the atmosphere directly through an exhaust device 66 after being defoamed by a defoaming device 61. Passing through a plurality of balls 63The wastewater is gathered in a water storage device 65 at the bottom of the tower, overflows to a second booster pump 9 and is then pumped to a precision filter 7, and sulfur in the wastewater is filtered; and then pumped to the second membrane module 8 by the second high-pressure pump 11, wherein the wastewater is further filtered again, the ammonia nitrogen and COD contained in the wastewater are further reduced, and finally the effluent meets the discharge requirement.
Table 1 shows the system operating parameters of each section of the high ammonia nitrogen and high carbonate wastewater treatment system, and table 2 shows the ammonia nitrogen removal rate of the relevant section.
TABLE 1 System operating parameters of various sections of a high Ammonia Nitrogen and high carbonate wastewater treatment System
Figure BDA0002828536700000041
TABLE 2 removal of ammonia nitrogen from various sections of a high ammonia nitrogen and high carbonate wastewater treatment system
Figure BDA0002828536700000042
Table 1 shows the system operating parameters of each section of the high ammonia nitrogen and high carbonate wastewater treatment system, and it can be seen from the effluent conductivity that the conductivity reflects the content of soluble organic matters in the wastewater, and the lower the conductivity, the lower the COD.
Table 2 shows the ammonia nitrogen removal rates of the various sections of the high ammonia nitrogen and high carbonate wastewater treatment system. It can be seen that the ammonia nitrogen removal rate of the whole system reaches 99-99.7% by the high ammonia nitrogen and high carbonate wastewater treatment system.
The above data show that the ammonia nitrogen contained in the wastewater treated by the high ammonia nitrogen and high carbonate wastewater treatment system can be effectively removed, and finally the wastewater reaches the national discharge standard, thereby being beneficial to environmental protection.
In some embodiments of the invention, the front membrane module comprises: a reverse osmosis membrane module and a nanofiltration membrane module.
Specifically, the front membrane module can be also set to be a combined form of a reverse osmosis membrane module and a nanofiltration membrane module, so that impurities in the wastewater can be effectively removed, and the wastewater treatment efficiency is improved.
Wherein, the reverse osmosis membrane module can get rid of dissolved salts, colloid, microorganism, organic matter etc. in aquatic effectively, and the technical principle is: under the action of the osmotic pressure higher than that of the solution, other substances are separated from water according to the characteristic that the substances cannot permeate through the semipermeable membrane. The nanofiltration membrane module has a pore diameter of more than 1nm, generally 1-2nm, is a functional semipermeable membrane allowing solvent molecules or certain low molecular weight solutes or low valence ions to permeate, and is used for removing organic matters and chromaticity in water and partially removing soluble salts and the like.
In some embodiments of the invention, a membrane module comprises: spiral wound membrane module or disc tube column type membrane module.
The spiral-wound membrane component is a membrane application form which is most widely used in the market, has the main advantages of high packing density and simple and convenient use and operation, is mainly formed by rolling a flat membrane, and comprises flat membrane sheets, a feeding grid net, a dialysate grid net, glue, a dialysate collecting pipe and other components.
The disc tubular column type membrane component mainly comprises an RO membrane, a flow guide disc, a central pull rod, a shell, various sealing elements of flanges at two ends, a connecting bolt and the like; the filter membrane and the flow guide disc are stacked together, fixed by a central pull rod and an end cover flange, and then placed in a pressure-resistant shell to form a disc-tube type membrane component.
Through making the membrane module set up to roll up formula membrane module or dish tubular column type membrane module, impurity in the homoenergetic is effectual got rid of waste water, and the kind of actually chooseing for use is decided according to the actual conditions of waste water.
In some embodiments of the invention, the pH control module 5 comprises: the device comprises a dosing pump, a reaction box, a reaction stirring unit, a pH value controller and a dosing box.
Specifically, the dosing pump is used for pumping sulfuric acid in the dosing tank and discharging the sulfuric acid into the reaction tank to react with flowing wastewater; the reaction stirring unit is used for stirring the wastewater in the reaction box and the sulfuric acid to ensure that the wastewater is fully contacted, so that the reaction speed and efficiency are increased; the pH value controller is used for detecting the concentration of the solution in the reaction box and ensuring that the pH value of the wastewater after reaction meets the requirements, thereby improving the removal rate of ammonia nitrogen.
The above description is only a preferred embodiment of the present invention and is not intended to limit the design of the present invention, and all equivalent changes made in the design key point of the present invention fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a high ammonia nitrogen and high carbonate's effluent disposal system which characterized in that includes:
a front membrane module;
the pH value control module is used for adjusting the pH value of the wastewater to 2.5-5.0;
the top of the degassing tower is provided with a spraying device, the middle part of the degassing tower is provided with a filler, and the bottom of the degassing tower is provided with a fan and a water storage device; the fan is used for reversely blowing the waste water sprayed out by the spraying device;
a rear membrane module;
the front membrane module is communicated with the spraying device through the pH value control module; the water storage device is communicated with the rear membrane module.
2. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 1, wherein the packing is a multi-faceted sphere.
3. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 1, wherein the pre-membrane module comprises a reverse osmosis membrane module and a nanofiltration membrane module.
4. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 1, wherein said pre-membrane module comprises: filters, high pressure pumps and membrane modules.
5. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 4, wherein said membrane module comprises: spiral wound membrane module or disc tube column type membrane module.
6. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 1, wherein said pH control module comprises: the device comprises a dosing pump, a reaction box, a reaction stirring unit, a pH value controller and a dosing box.
7. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 1, wherein the pH value of the high ammonia nitrogen and high carbonate wastewater is controlled to be 6.0-7.0 before entering the pre-membrane system.
8. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 7, further comprising: a pre-treatment module in communication with the pre-membrane module.
9. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 8, wherein said pretreatment module comprises: one or more of a screen filter, a sand filter, or a surface filter.
10. The high ammonia nitrogen and high carbonate wastewater treatment system according to claim 9, wherein said surface filter comprises: a core surface filter or a bag surface filter.
CN202011435548.0A 2020-12-10 2020-12-10 High ammonia nitrogen and high carbonate's effluent disposal system Pending CN113955871A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8252183B1 (en) * 2011-10-28 2012-08-28 Kent Bioenergy Corporation Treating nitorogen-contaminated wastewaters
CN105174532A (en) * 2015-08-13 2015-12-23 江苏好山好水环保科技有限公司 Pretreatment system for prevention of scaling of high ammonia-nitrogen industrial wastewater before ammonia distillation and treatment method thereof
CN108128989A (en) * 2018-02-12 2018-06-08 南京贝克特环保科技有限公司 A kind of new bio nitrogen fixation process processing high ammonia-nitrogen wastewater device and processing method
CN209210544U (en) * 2018-12-10 2019-08-06 北京合众清源环境科技有限公司 High ammonia nitrogen, high-sulfur compound garbage percolation liquid treating system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8252183B1 (en) * 2011-10-28 2012-08-28 Kent Bioenergy Corporation Treating nitorogen-contaminated wastewaters
CN105174532A (en) * 2015-08-13 2015-12-23 江苏好山好水环保科技有限公司 Pretreatment system for prevention of scaling of high ammonia-nitrogen industrial wastewater before ammonia distillation and treatment method thereof
CN108128989A (en) * 2018-02-12 2018-06-08 南京贝克特环保科技有限公司 A kind of new bio nitrogen fixation process processing high ammonia-nitrogen wastewater device and processing method
CN209210544U (en) * 2018-12-10 2019-08-06 北京合众清源环境科技有限公司 High ammonia nitrogen, high-sulfur compound garbage percolation liquid treating system

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Application publication date: 20220121