CN113121057B - Process and device for treating organic wastewater by using aerobic activated sludge - Google Patents
Process and device for treating organic wastewater by using aerobic activated sludge Download PDFInfo
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- CN113121057B CN113121057B CN201911396269.5A CN201911396269A CN113121057B CN 113121057 B CN113121057 B CN 113121057B CN 201911396269 A CN201911396269 A CN 201911396269A CN 113121057 B CN113121057 B CN 113121057B
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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
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/30—Organic compounds
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- 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
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- Activated Sludge Processes (AREA)
Abstract
The invention discloses a process for treating organic wastewater by using aerobic activated sludge, which comprises the following steps: s1, introducing the wastewater in a raw water tank into a reaction stirring tank, and adding a medicament for treatment to reduce the COD value in the wastewater to below 2000; s2, the treated wastewater in the reaction stirring tank enters a biological filter through a sludge pump for degradation treatment; s3, introducing the treated wastewater in the biological filter into a sedimentation tank for sedimentation treatment, introducing clear liquid above the sedimentation tank into a discharge tank for direct discharge after the clear liquid is detected to reach the standard, conveying sludge below the sedimentation tank into a sludge digestion tank through a sludge pump, adding sludge bacteria used by an urban sewage plant into the sludge digestion tank, and treating the sludge by the sludge bacteria in an aeration state; and S4, the liquid above the sludge digestion tank enters the raw water tank again for treatment and discharge, and the solid below the sludge digestion tank is discharged for subsequent treatment.
Description
Technical Field
The invention relates to the technical field of organic wastewater treatment, in particular to a process and a device for treating organic wastewater by using aerobic activated sludge.
Background
The organic solid waste generated in the organic waste water treatment process is treated by landfill and incineration, the landfill method treatment mode is a serious test on land space, land resources are limited, unreasonable application is exhausted, however, the incineration treatment mode is adopted, namely, energy (natural gas or oil) is used for combustion, organic matters in the organic solid waste are thoroughly decomposed on the premise of sufficient oxygen supply to generate carbon dioxide, water, energy and partial inorganic matters, but on the premise of insufficient oxygen supply or insufficient temperature, a plurality of harmful substances are generated, such as dioxin, sulfide, carbide and the like to cause secondary pollution, and a large amount of energy is consumed in the treatment process.
The activated sludge is mainly composed of microorganisms such as bacteria, fungi, protozoa and metazoans, which are formed by mixing and continuously culturing various microorganism populations and metal hydroxides, and has the properties of coagulating, adsorbing, oxidizing and decomposing organic pollutants in the wastewater.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide a process and a device for treating organic wastewater by using aerobic activated sludge, which take sludge bacteria generated by a municipal sewage plant as aerobic activated sludge to perform subsequent treatment on the sludge generated in the wastewater treatment process, thereby reducing the overall treatment cost, furthest reducing the content of organic matters in the sludge generated in the wastewater treatment process, further effectively reducing the sludge amount generated in the wastewater treatment process, and avoiding the increase of the production cost caused by excessive sludge amount.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided a process for treating organic wastewater with aerobic activated sludge, comprising the steps of:
s1, introducing the wastewater in a raw water tank into a reaction stirring tank, adding a medicament into the reaction stirring tank, and stirring and mixing to reduce the COD value in the wastewater to below 2000;
s2, the wastewater treated in the reaction stirring tank enters a biological filter through a sludge pump, microorganisms in the biological filter are fully contacted with organic matters in the wastewater for degradation, the wastewater is layered in the biological filter, the upper layer is a clear water layer, the middle layer is a solid-liquid mixture layer, and the lowest layer is a sludge layer;
s3, introducing the treated wastewater in the biological filter into a sedimentation tank for sedimentation treatment, introducing clear liquid above the sedimentation tank into a discharge tank for direct discharge after COD, ammonia nitrogen and total phosphorus indexes reach standards through detection, conveying sludge below the sedimentation tank into a sludge digestion tank through a sludge pump, adding aerobic activated sludge into the sludge digestion tank, wherein the aerobic activated sludge is sludge bacteria used by an urban sewage plant, and the sludge bacteria biodegrade the sludge in the sludge digestion tank in an aeration state to realize reduction, harmlessness and resource treatment of the sludge, and the principle is that microorganisms in the activated sludge carry out aerobic respiration to generate metabolism so as to degrade organic matters in the sludge, so that the organic matters in the sludge partially generate carbon dioxide, water, biological heat and ammonia gas;
and S4, the liquid above the sludge digestion tank enters the raw water tank again for treatment and discharge, and the solid below the sludge digestion tank is discharged for subsequent treatment.
Preferably, in the step S3, the feeding ratio of the sludge bacteria to the sludge in the sludge digestion tank is 3.
Preferably, aeration devices are arranged in the biological filter and the sludge digestion tank.
Preferably, the sludge generated in the reaction stirring tank and the biological filter can be conveyed to the sludge digestion tank through a sludge pump.
Preferably, the COD value of the raw wastewater is 2000-3000mg/L, the ammonia nitrogen content is 15-22mg/L, the pH value is 6.5-7.8, and the total phosphorus content is 9-12mg/L.
In a second aspect of the present invention, there is provided a device for treating organic wastewater with aerobic activated sludge, which is used in the above process, comprising a raw water tank, a reaction stirring tank, a biological filter, a sedimentation tank and a discharge tank, which are sequentially communicated with each other through a pipeline, wherein the bottoms of the reaction stirring tank, the biological filter and the sedimentation tank are respectively communicated with a sludge digestion tank through a sludge pump, the upper part of the sludge digestion tank is communicated with the raw water tank through a pipeline, and aeration devices are respectively arranged in the biological filter and the sludge digestion tank.
Preferably, the reaction stirring tank, the biological filter and the sedimentation tank are folded towards the middle at the lower part periphery to form a slope shape, so that solid matters can be conveniently settled.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, COD, ammonia nitrogen and total phosphorus indexes in the effluent water after wastewater treatment all reach the discharge standard, simultaneously sludge generated by the reaction stirring tank, the biological filter and the sedimentation tank is conveyed into the sludge digestion tank, sludge bacteria generated by the municipal sewage plant are added into the sludge digestion tank as aerobic activated sludge, so that the treatment cost is reduced, organic matters in the sludge are degraded by aerobic respiration of microorganisms in the aerobic activated sludge to generate metabolism, and the organic matters in the sludge partially generate carbon dioxide, water, biological heat and ammonia gas, so that the content of the organic matters in the sludge generated in the wastewater treatment process can be reduced to the maximum extent, the amount of the sludge generated in the wastewater treatment process can be effectively reduced, and the increase of the production cost caused by excessive sludge is avoided.
Drawings
The invention is described in further detail below with reference to specific embodiments and with reference to the following drawings.
FIG. 1 is a structural view of an apparatus for treating organic wastewater using aerobic activated sludge according to the present invention;
wherein the specific reference numerals are: the system comprises a raw water pool 1, a reaction stirring pool 2, a biological filter 3, a sedimentation pool 4, a discharge pool 5, an aeration device 6, an air blower 7 and a sludge digestion pool 8.
Detailed Description
The embodiment discloses a device for treating organic wastewater by using aerobic activated sludge, as shown in fig. 1, comprising a raw water tank 1, a reaction stirring tank 2, a biological filter 3, a sedimentation tank 4 and a discharge tank 5 which are sequentially communicated through a pipeline, wherein the bottom of the reaction stirring tank 2, the biological filter 3, the sedimentation tank 4 are respectively communicated with a sludge digestion tank 8 through a sludge pump, the upper part of the sludge digestion tank 8 is communicated with the raw water tank 1 through a pipeline, aeration devices 6 are respectively arranged in the biological filter 3 and the sludge digestion tank 8, and the aeration devices 6 in the biological filter 3 and the sludge digestion tank 8 are both connected to the same blower 7. Wherein, upper portion is provided with agitating unit in the reaction stirring pond 2, and 2 tops in the reaction stirring pond have been seted up and have been added the medicine mouth, and it is connected with the medicament case through the pipeline to add medicaments such as flocculating agent in the reaction stirring pond 2 to be convenient for, and reaction stirring pond 2, biological filter 3 and sedimentation tank 4 lower part periphery draw in to the centre and form the slope form, are convenient for subside the solid.
The process for treating organic wastewater by using the aerobic activated sludge by adopting the device comprises the following steps:
s1, introducing the wastewater in a raw water tank 1 into a reaction stirring tank 2, wherein the COD value of raw wastewater is 2000-3000mg/L, the ammonia nitrogen content is 15-22mg/L, the pH value is 6.5-7.8, and the total phosphorus content is 9-12mg/L, and adding a medicament into the reaction stirring tank 2 for stirring and mixing so as to reduce the COD value in the wastewater to below 2000;
s2, the wastewater after treatment in the reaction stirring tank 2 enters a biological filter 3 through a sludge pump, microorganisms in the biological filter 3 are fully contacted with organic matters in the wastewater for degradation, the wastewater is layered in the biological filter 3, the upper layer is a clear water layer, the middle layer is a solid-liquid mixture layer, and the lowest layer is a sludge layer;
s3, introducing the treated wastewater in the biological filter 3 into a sedimentation tank 4 for sedimentation treatment, detecting COD, ammonia nitrogen and total phosphorus indexes of the clear liquid above the sedimentation tank 4 to reach standards, introducing the clear liquid into a discharge tank 5 for direct discharge, conveying the sludge generated in the reaction stirring tank 2, the biological filter 3 and the sedimentation tank 4 into a sludge digestion tank 8 through a sludge pump, and adding aerobic activated sludge into the sludge digestion tank 8, wherein the aerobic activated sludge is sludge bacteria used by a home and harbor urban sewage plant, the adding ratio of the sludge bacteria to the sludge in the sludge digestion tank 8 is 3;
and S4, the liquid above the sludge digestion tank 8 enters the raw water tank 1 again for treatment and discharge, and the solid below the sludge digestion tank 8 is discharged for subsequent treatment.
The treatment process is adopted to carry out a plurality of groups of sewage treatment experiments and sludge treatment experiments in a sludge digestion tank on the wastewater of a certain factory in Jiangsu, the COD value of the raw water of the wastewater is 2000-3000mg/L, the ammonia nitrogen content is 15-22mg/L, the pH value is 6.5-7.8, the total phosphorus content is 9-12mg/L, and the specific test results are shown in tables 1 and 2.
TABLE 1 Experimental data for Sewage treatment
TABLE 2 sludge treatment experiment data in the sludge digestion tank 8
As can be seen from the experimental data in tables 1 and 2, the COD, ammonia nitrogen and total phosphorus content in the wastewater after the wastewater is treated are greatly reduced to reach the discharge standard, and simultaneously, the sludge generated by the reaction stirring tank, the biological filter and the sedimentation tank is conveyed into the sludge digestion tank, and after the aerobic activated sludge is subjected to microbial degradation treatment, the organic matter content in the sludge can be reduced, and the amount of the generated sludge can be reduced.
The present invention has been described in terms of specific examples, which are provided to aid in understanding the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (2)
1. A process for treating organic wastewater by using aerobic activated sludge is characterized by comprising the following steps:
s1, introducing the wastewater in a raw water tank into a reaction stirring tank, adding a medicament into the reaction stirring tank, and stirring and mixing to reduce the COD value in the wastewater to below 2000;
s2, the wastewater treated in the reaction stirring tank enters a biological filter through a sludge pump, microorganisms in the biological filter are fully contacted with organic matters in the wastewater for degradation, the wastewater is layered in the biological filter, the upper layer is a clear water layer, the middle layer is a solid-liquid mixture layer, and the lowest layer is a sludge layer;
s3, introducing the treated wastewater in the biological filter into a sedimentation tank for sedimentation treatment, introducing clear liquid above the sedimentation tank into a discharge tank for direct discharge after the clear liquid reaches the standard through detection, conveying sludge below the sedimentation tank into a sludge digestion tank through a sludge pump, and adding aerobic activated sludge into the sludge digestion tank, wherein the aerobic activated sludge is sludge bacteria used by an urban sewage plant and treats the sludge in an aeration state;
s4, liquid above the sludge digestion tank enters the raw water tank again for treatment and discharge, and solid matter below the sludge digestion tank is discharged for subsequent treatment;
in the step S3, the feeding ratio of sludge bacteria to sludge in the sludge digestion tank is 3;
the COD value of the raw wastewater is 2000-3000mg/L, the ammonia nitrogen content is 15-22mg/L, the pH value is 6.5-7.8, and the total phosphorus content is 9-12mg/L;
and the sludge generated in the reaction stirring tank and the biological filter tank is conveyed to a sludge digestion tank through a sludge pump.
2. The process for treating organic wastewater by using aerobic activated sludge as claimed in claim 1, wherein aeration devices are installed in the biological filter and the sludge digestion tank, and the aeration devices are connected with a blower.
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| CN201911396269.5A CN113121057B (en) | 2019-12-30 | 2019-12-30 | Process and device for treating organic wastewater by using aerobic activated sludge |
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| CN201911396269.5A CN113121057B (en) | 2019-12-30 | 2019-12-30 | Process and device for treating organic wastewater by using aerobic activated sludge |
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| CN113121057B true CN113121057B (en) | 2023-04-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659242A (en) * | 2012-05-31 | 2012-09-12 | 上海环保（集团）有限公司 | Nutrient self compensation and excess sludge reduction sewage treatment method and system thereof |
| CN203487006U (en) * | 2013-09-13 | 2014-03-19 | 江苏中世环境科技股份有限公司 | Sewage disposal system with germ biodegradation function |
| CN203487008U (en) * | 2013-09-14 | 2014-03-19 | 江苏中世环境科技股份有限公司 | Efficient sewage disposal device |
| CN205974212U (en) * | 2016-08-27 | 2017-02-22 | 山东沃能环保工程科技有限公司 | Sewage treatment device with aerobic sludge digestion device |
| CN108373219A (en) * | 2018-04-19 | 2018-08-07 | 临沂大学 | A kind of wicker plaiting article treatment of dyeing wastewater equipment for reclaiming and method |
-
2019
- 2019-12-30 CN CN201911396269.5A patent/CN113121057B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659242A (en) * | 2012-05-31 | 2012-09-12 | 上海环保（集团）有限公司 | Nutrient self compensation and excess sludge reduction sewage treatment method and system thereof |
| CN203487006U (en) * | 2013-09-13 | 2014-03-19 | 江苏中世环境科技股份有限公司 | Sewage disposal system with germ biodegradation function |
| CN203487008U (en) * | 2013-09-14 | 2014-03-19 | 江苏中世环境科技股份有限公司 | Efficient sewage disposal device |
| CN205974212U (en) * | 2016-08-27 | 2017-02-22 | 山东沃能环保工程科技有限公司 | Sewage treatment device with aerobic sludge digestion device |
| CN108373219A (en) * | 2018-04-19 | 2018-08-07 | 临沂大学 | A kind of wicker plaiting article treatment of dyeing wastewater equipment for reclaiming and method |
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