CN213326938U - Wastewater treatment device based on two-stage A/O process - Google Patents

Wastewater treatment device based on two-stage A/O process Download PDF

Info

Publication number
CN213326938U
CN213326938U CN202021807339.XU CN202021807339U CN213326938U CN 213326938 U CN213326938 U CN 213326938U CN 202021807339 U CN202021807339 U CN 202021807339U CN 213326938 U CN213326938 U CN 213326938U
Authority
CN
China
Prior art keywords
tank
anoxic
aeration tank
aeration
stage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202021807339.XU
Other languages
Chinese (zh)
Inventor
仇鑫耀
李春峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vyt Environmental Technology Shanghai Co ltd
Original Assignee
Shanghai Xinyuan Environmental Engineering Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Xinyuan Environmental Engineering Co ltd filed Critical Shanghai Xinyuan Environmental Engineering Co ltd
Application granted granted Critical
Publication of CN213326938U publication Critical patent/CN213326938U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/34Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/306Pesticides
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/38Organic compounds containing nitrogen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/343Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics

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)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The utility model relates to a waste water treatment device based on two sections AO technologies, a serial communication port, including first section AO system, second section AO system and two heavy ponds. The water inlet pipelines of the first section of A/O system and the second section of A/O system are arranged in parallel and series connection at the same time, the nitrified liquid in the aeration tank flows back to the anoxic tank, and the sludge in the secondary sedimentation tank flows back to the anoxic tank. The utility model provides a high ammonia nitrogen organic waste water's a difficult problem of processing, high ammonia nitrogen waste water can directly carry out biochemical treatment without passing through the preliminary treatment, has solved the bottleneck that traditional AO technology denitrogenation efficiency received the reflux ratio restriction simultaneously, has guaranteed that the total nitrogen of effluent is up to standard, and this method easy operation, the small investment, it is high to the treatment effeciency of ammonia nitrogen and total nitrogen, application scope is wide, easily industrialization is used.

Description

Wastewater treatment device based on two-stage A/O process
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a wastewater treatment device based on two sections of A (anoxic tank)/O (aeration tank) processes and a method for treating high ammonia nitrogen organic wastewater by using the device.
Background
At present, the treatment of high ammonia nitrogen wastewater is a difficult problem in the sewage treatment industry. On one hand, the ammonia nitrogen concentration is too high to bring inhibition to biological treatment, and generally speaking, when the ammonia nitrogen concentration of a biochemical system reaches more than 50mg/L, the problems that nitration reaction is inhibited and the ammonia nitrogen concentration of effluent is increased are shown. Therefore, the wastewater with high ammonia nitrogen concentration is generally pretreated, and the pretreatment measures generally comprise a stripping method, an adsorption method, a precipitation method, an oxidation method and the like, but various pretreatment methods have the problems of high treatment cost, secondary pollution and the like, so that the direct biological treatment of the wastewater with high ammonia nitrogen concentration is the most economic, effective and promising method. The second aspect is that the biological treatment of high ammonia nitrogen wastewater has the problem that the total nitrogen of the effluent exceeds the standard, for example, the discharge standard of the fermentation pharmaceutical industry (GB21903-2008) requires that the ammonia nitrogen of the effluent is less than 35mg/L, the total nitrogen of the effluent is less than 70mg/L, and the total nitrogen concentration of the influent is close to 1000mg/L, so that the removal rate of the total nitrogen needs to be 95%, and the high removal rate is difficult to achieve by the existing sewage treatment process. Therefore, the effluent is usually further subjected to denitrification treatment, which results in high treatment cost.
For a long time, the total nitrogen index is not listed in the assessment range in the surface water environment quality assessment system, so that the attention degree of all places on the total nitrogen control is relatively insufficient, and the control strength is deficient. However, in recent years, nitrogen pollution has become a main factor of offshore area, lake and reservoir pollution, and has become a prominent bottleneck affecting the improvement of watershed water quality. It is expected that the national emission standard and supervision of total nitrogen will become more and more strict in the future, and especially the problem of reaching the standard of total nitrogen is more and more emphasized in the industries producing high ammonia nitrogen wastewater such as chemical industry, pharmacy, coking, nitrogenous fertilizer, livestock raising, slaughtering and the like and corresponding chemical industry parks.
For the treatment of high ammonia nitrogen wastewater, the A/O process is widely applied with the advantages of maturity and reliability. However, the removal of total nitrogen by the A/O process is limited in denitrification efficiency by the reflux ratio (R: the ratio of the reflux flow rate to the feed flow rate). Theoretically, the denitrification efficiency is R/(R +1), and the denitrification efficiency of the A/O process is 80-90%. In order to ensure the standard reaching, the current common practice is to carry out denitrification treatment after A/O. However, this requires consumption of carbon source, and the operation cost is high, and the organic matter remaining after denitrification causes a problem of increase in COD of the effluent. How to break through the limitation of reflux ratio of the A/O process and improve the denitrification rate of the A/O process becomes a big problem in the sewage treatment industry.
Therefore, there is a continuing need in the art to develop an apparatus and method for treating high ammonia nitrogen wastewater.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a wastewater treatment device with high denitrification rate based on two sections of A/O processes. Particularly, the high ammonia nitrogen wastewater is treated by adopting a two-stage A/O process, so that the technical problem in the field of sewage treatment is solved. In addition, certain measures are taken on the operation process and the operation equipment, the total nitrogen removal efficiency can be higher than that of theoretical calculation data, and the result shows that in the actual reaction process, the two sections of A/O processes are not only the combination of two A/O systems, but also various biochemical reactions of simultaneous nitrification and denitrification, partial nitrification and denitrification and anaerobic ammonia oxidation exist.
It is also an object of the present application to provide a method for treating wastewater by means of a wastewater treatment plant based on a two-stage a/O process as described above.
In order to achieve the purpose of the present invention, the present application provides the following technical solutions.
In a first aspect, the present application provides a wastewater treatment apparatus based on a two-stage a/O process, comprising a first stage a/O system, a second stage a/O system, and a secondary sedimentation tank;
the first stage A/O includes:
a first anoxic tank and a first aeration tank, which are connected in series with each other;
the first water inlet pipeline is used for inputting wastewater to be treated into the first anoxic pond;
a first water outlet line for outputting the wastewater treated by the first anoxic tank and the first aeration tank from the first aeration tank;
a first nitrified liquid return line for returning the nitrified liquid in the first aeration tank to the first anoxic tank;
the second segment A/O includes:
a second anoxic tank and a second aeration tank, which are connected in series with each other;
the second water inlet pipeline is used for inputting wastewater to be treated into the second anoxic pond;
a second water outlet line for outputting the wastewater treated by the second anoxic tank and the second aeration tank from the second aeration tank;
a second nitrified liquid return line for returning the nitrified liquid in the second aeration tank to the second anoxic tank;
wherein the secondary sedimentation tank is in fluid communication with the second outlet pipeline, and the secondary sedimentation tank returns sludge in the secondary sedimentation tank to the first anoxic tank and/or the second anoxic tank through a first sludge return pipeline;
wherein the first water inlet line and the second water inlet line are arranged in parallel;
wherein the first water outlet line is in fluid communication with the second anoxic tank.
In one embodiment of the first aspect, the first anoxic tank and the first aeration tank are configured as an integrated cycle;
the second anoxic tank and the second aeration tank are configured as an integrated cycle.
In one embodiment of the first aspect, the first anoxic tank and/or the second anoxic tank comprises an agitation device, preferably comprising one or more of an underwater propeller and a vertical agitator.
In one embodiment of the first aspect, the first aeration tank and the second aeration tank comprise aeration means, preferably comprising HS cut-through aerators manufactured by shanghai edge environmental engineering limited.
In one embodiment of the first aspect, the volume ratio of the first anoxic tank to the second anoxic tank is 1:1 to 2: 1.
In one embodiment of the first aspect, the first aeration tank and/or the second aeration tank is divided into 2 to 6 compartments, and the ratio of the length to the width of each compartment of the galleries is (4:1) to (10: 1).
In a second aspect, the present application provides a method of treating wastewater by a wastewater treatment plant based on a two-stage a/O process as described in the first aspect.
In one embodiment of the second aspect, the first anoxic tank, the second anoxic tank, the first aeration tank, or the second aeration tank comprises one or more of the following flora: bacteroides (Bacteroides), Proteobacteria (Proteobacteria), ammonia oxidizing bacteria (Nitrosomonas, Niosococcus, etc.), nitrite oxidizing bacteria (Nitrobacter, Nitrococcus, etc.), Pseudomonas (Pseudomonas), Achromobacter (Achromobacter), Alcaligenes (Alcaligenes), Anammox (Anammox).
In one embodiment of the second aspect, the effluent BOD of the first stage A/O system5The concentration of the ammonia nitrogen in the effluent is not more than 5 mg/L; BOD of effluent of the second section A/O system5Not more than 5mg/L, and the ammonia nitrogen of the effluent is not more than 5 mg/L.
In one embodiment of the second aspect, the average sludge concentration of the first stage A/O system and the second stage A/O system is between 6g/L and 15 g/L.
In one embodiment of the second aspect, the COD load of the first stage a/O system and the second stage a/O system is 0.05 to 0.1 gpod/(gMLVSS-d).
In one embodiment of the second aspect, the first anoxic tank and/or the second anoxic tank have a denitrification degradation rate of 0.05 ℃ @0.2gNO3-N/(gMLVSS·d)。
In one embodiment of the second aspect, the wastewater to be treated has COD and NO3The ratio-N is 4-5.
In one embodiment of the second aspect, the dissolved oxygen DO of the first anoxic tank and/or the second anoxic tank is less than 0.5mg/L, and the pH is 6.5 to 7.5.
In one embodiment of the second aspect, the nitrification reaction rate of the first aeration tank and/or the second aeration tank is 3 to 6mgNH3-N/(L·h)。
In one embodiment of the second aspect, the dissolved oxygen DO at the end of the first aeration tank and/or the end of the second aeration tank is 3-6 mg/L.
In one embodiment of the second aspect, the reflux ratio of the nitrifying liquid of the first-stage A/O system is 4-10; and the reflux ratio of the nitrifying liquid of the second section of A/O system is 4-10.
In one embodiment of the second aspect, the surface load of the secondary sedimentation tank is 0.5 to 0.75m3/(m2·h)。
In one embodiment of the second aspect, the sludge reflux ratio of the secondary sedimentation tank is 1-2.
In one embodiment of the second aspect, the ammonia nitrogen concentration of the wastewater to be treated is less than or equal to 2000 mg/L.
Compared with the prior art, the beneficial effects of the utility model reside in that: (1) the problem of toxicity of high ammonia nitrogen to the wastewater is solved, and the biochemical treatment is directly carried out without pretreatment; (2) the bottleneck that the denitrification efficiency of the existing A/O process is limited by the reflux ratio is overcome, the actual denitrification efficiency reaches over 95 percent and exceeds the theoretical denitrification efficiency; (3) the investment is saved, the operation is simple and convenient, the operation cost is low, and the maintenance is easy; (4) wide application range, easy popularization and application, and is suitable for treating high ammonia nitrogen industrial wastewater and urban sewage and industrial park sewage with high requirement on total nitrogen treatment.
Drawings
FIG. 1 is a schematic view of a wastewater treatment apparatus based on a two-stage A/O process according to example 1.
FIG. 2 is a schematic view of a wastewater treatment apparatus based on a two-stage A/O process according to example 2.
In the above figures, the reference numerals have the following meanings:
11 first anoxic tank
12 first aeration tank
13 second anoxic tank
14 second aeration tank
15 secondary sedimentation tank
101 first water inlet pipeline
102 second water inlet pipeline
103 first nitrified liquid reflux pipeline
104 second nitrified liquid return line
105 first sludge return line
106 first water outlet line
107 second water outlet line
108 secondary sedimentation tank water outlet pipeline
200 water inlet main pipeline
21 first series of first anoxic tanks
22 first series of first aeration tanks
23 second anoxic tank of the first series
24 second aeration tank of the first series
25 first series of secondary sedimentation tanks
26 three-sedimentation tank
201 first series of first water inlet lines
202 first series of second water inlet lines
203 first series of first nitrated liquid return lines
204 first series of second nitrated liquid return lines
205 first series of first sludge recirculation lines
206 first series of first outlet lines
207 second water outlet line of the first series
208 first series of secondary sedimentation tank water outlet pipelines
209 three-sedimentation tank water outlet pipeline
31 first anoxic tank of second series
32 first aeration tank of second series
33 second series of second anoxic tanks
34 second series of second aeration tanks
35 second series of secondary sedimentation tanks
301 first water inlet line of the second series
302 second series of second water inlet lines
303 first nitrating liquid reflux line of second series
304 second series of second nitrated liquid return lines
305 first sludge return line of the second series
306 first water outlet line of the second series
307 second series of second water outlet lines
308 second series of secondary settling tanks.
Detailed Description
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as is understood by those of ordinary skill in the art to which the invention belongs. All numerical values recited herein as between the lowest value and the highest value are intended to mean all values between the lowest value and the highest value in increments of one unit when there is more than two units difference between the lowest value and the highest value. In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
In the following description of the embodiments of the present invention, with reference to the drawings, it is noted that in the detailed description of the embodiments, all features of the actual embodiments may not be described in detail in order to make the description concise and concise. Modifications and substitutions may be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the invention, and the resulting embodiments are within the scope of the invention.
As mentioned above, the existing A/O process has insufficient nitrogen removal efficiency when treating high ammonia-nitrogen wastewater due to the limitation of reflux ratio. After the A/O process treatment, the denitrification treatment is carried out separately, which not only causes the increase of the cost, but also causes the increase of the COD effluent of the final effluent.
In order to solve the technical problem, the application provides a wastewater treatment device based on two-stage A/O technology, so that high ammonia nitrogen organic wastewater respectively enters two stages of A/O systems under the condition of no pretreatment, and effluent of a first stage A/O system enters a second stage A/O system. The first stage and second stage a/O systems of the wastewater treatment plants described herein are in both series and parallel relationship. And a nitrified liquid return line is arranged in each section of the A/O system. In addition, the wastewater treatment device also comprises a secondary sedimentation tank, wherein the secondary sedimentation tank returns sludge to the anoxic tank through a sludge return line, so that nitrification, denitrification, short-cut nitrification and denitrification, simultaneous nitrification and denitrification and anaerobic ammonia oxidation reactions can be simultaneously carried out in the anoxic tank and/or the aeration tank, and the synergistic effect of various floras is obvious.
In one embodiment, the application provides a device for removing high ammonia nitrogen organic wastewater by a two-stage A/O process, which is characterized in that the high ammonia nitrogen wastewater enters a first-stage A/O system and a second-stage A/O system respectively, and the two-stage A/O systems are connected in parallel from the water inlet. And simultaneously, the effluent of the first section of A/O system enters a second section of A/O system, and the two sections of A/O systems are connected in series. Thus fully utilizing the organic carbon source of the inlet water and reducing the cost of additionally supplementing the carbon source. In addition, the two sections of A/O have nitration liquid reflux, which is equal to the improvement of the reflux ratio of the nitration liquid. And finally, the effluent of the first section has a diluting effect on the influent of the second section, so that the concentration of toxic substances is reduced, and the denitrification rate is higher. The total nitrogen comprises organic nitrogen, ammonia nitrogen, nitrate nitrogen and nitrite nitrogen. The traditional A/O process is a pre-denitrification process, wastewater sequentially passes through an anoxic tank, an aerobic tank and a secondary sedimentation tank, nitrification liquid flows back from the aerobic tank to the anoxic tank, and sludge flows back from the secondary sedimentation tank to the anoxic tank.
In one embodiment, the high ammonia nitrogen wastewater can directly enter an A/O system for treatment without pretreatment measures such as stripping, and the concentration of the ammonia nitrogen in the inlet water can reach 2000mg/L, such as 900mg/L, 1000mg/L, 1500mg/L or 2000 mg/L.
In one embodiment, the anoxic tank and the aeration tank are in an integrated circulation mode, the same reaction tank contains multiple floras, nitrification, denitrification, short-cut nitrification and denitrification, simultaneous nitrification and denitrification and anaerobic ammonia oxidation reactions exist simultaneously, and the synergistic effect of the various floras is obvious.
In one embodiment, biological nitrification is a prerequisite for biological denitrification, and only good nitrification results in efficient and stable denitrification. Due to the fact thatEach section of A/O system is biodegraded to the limit, and the effluent BOD of each section of A/O system5Not more than 5mg/L, and the ammonia nitrogen of the effluent is not more than 5 mg/L.
In one embodiment, the average sludge concentration of the two-stage A/O system is between 6g/L and 15 g/L. For example, the average sludge concentration of the two-stage A/O system can be 6g/L, 7g/L, 8g/L, 9g/L, 10g/L, 11g/L, 12g/L, 13g/L, 14g/L, 15g/L, or a range or subrange between any two of them.
In one embodiment, the COD load of the two-stage A/O system is 0.05-0.1 gCOD/(gMLVSS.d).
In one embodiment, the anoxic tank performs agitation treatment while treating the wastewater. In a preferred embodiment, adequate mixing of the sludge and wastewater can be ensured by installing an underwater propeller or a vertical mixer. In a preferred embodiment, the underwater propeller has a power of l to 2W/m3Selecting the type, wherein the vertical stirring power is 5-15W/m3And (4) selecting the type, wherein specific data are selected according to the type of the reaction tank and the performance of equipment.
In one embodiment, the denitrification degradation rate of the anoxic tank is 0.05-0.2 gNO3-N/(gMLVSS · d). In a preferred embodiment, the denitrification degradation rate in the first anoxic tank and/or the second anoxic tank is 0.05-0.10 gNO3N/(gMLVSS. d), preferably at 20-30 ℃, DO less than 0.5mg/L, pH 6.5-7.5, C: n ═ 4-5: 1.
in one embodiment, to ensure good total nitrogen removal, it is desirable to ensure that the influent COD and NO are both present3the-N ratio is 4-5, otherwise, additional carbon source supplement is required.
In one embodiment, the nitrification reaction rate of the aeration tank is 3-6 mgNH3-N/(L.h), preferably at a temperature of 20-30 ℃.
In one embodiment, the dissolved oxygen DO at the tail end of each aeration tank is controlled to be 3-6 mg/L, the pH value is 7.0-8.0, and the reflux ratio of the nitrifying liquid of each section of A/O is 4-10.
In one embodiment, the aeration tank is a conventional aerobic activated sludge process, typically using blast aeration, aerationThe device is preferably an HS forced-cutting aerator produced by Shanghai edge environmental engineering Limited, and the ventilation rate of each aerator is 1.0-2.0 m3And/min, the aerators are linearly arranged, and the air flow rate of the main air pipe is 8-12 m/s.
In one embodiment, the aeration tank can be divided into 2 to 6 compartments, and the ratio of the length to the width of each compartment of the gallery is (4:1) to (10: 1). The width of the corridor is generally 7.5-10.0 meters, and the depth of the pool is generally 5.0-7.0 meters.
In one embodiment, the total volume of the A/O system is determined according to the total COD (chemical oxygen demand) and the total ammonia nitrogen content of the wastewater, and the COD load is generally 0.05-0.1 gCOD/(gMLVSS.d); the volume of the anoxic pond is determined according to the denitrification rate, and 0.05-0.2 gNO is generally taken3-N/(gMLVSS · d). In one embodiment, the volume ratio of the first anoxic tank to the second anoxic tank is 1:1 to 2: 1. When the concentration of toxic substances in the wastewater is higher, the value is smaller, and when the concentration of ammonia nitrogen in the wastewater is higher, the value is larger.
In one embodiment, the wastewater after two-stage A/O treatment enters a secondary sedimentation tank, and the surface load of the secondary sedimentation tank is preferably 0.5-0.75 m3/(m2H), the water depth of the secondary sedimentation tank is preferably 5-6.5 m, supernatant is discharged after sedimentation, and the sedimented sludge flows back to the first anoxic tank, wherein the preferable sludge backflow ratio is 1-2.
The present invention is further illustrated by way of the following examples, which are not intended to limit the scope of the invention.
In the following examples, COD and NH3N, TN and SS were measured according to the methods for Water and wastewater monitoring and analysis, environmental science publishers, fourth edition, 2002, China; the method specifically comprises the following steps: the COD detection method is a GB11914-89 potassium Choeroate method; NH (NH)3the-N detection method is GB7478-87 Nashin reagent photometry; the TN detection method is GB11894-89 potassium persulfate oxidation ultraviolet spectrophotometry; the SS detection method is GB11901-89 weight method.
Example 1
Utilize the utility model discloses a waste water treatment device based on two sections AO technologies upgrades town sewage treatment plant and changesAnd (5) manufacturing. The urban sewage treatment plant is designed to treat 7500m of domestic wastewater3D, 7500m of industrial park sewage3And d, the COD of the inlet water is 500mg/L, the total nitrogen of the inlet water is 100mg/L, the sewage plant originally adopts a CWSBR process, the COD of the outlet water is 50mg/L, the ammonia nitrogen of the outlet water is 5mg/L, and the total nitrogen of the outlet water is 20 mg/L.
And (3) transforming and upgrading the sewage plant, and adding two sections of A/O systems and a secondary sedimentation tank, which are specifically shown in figure 1. The newly added sewage treatment device comprises a first section of A/O system and a second section of A/O system. The first stage a/O system includes a first anoxic tank 11 and a first aeration tank 12 connected in series with each other. The second stage a/O system includes a second anoxic tank 13 and a second aeration tank 14 connected in series with each other. The outlet line 107 of the second aeration tank 14 is in fluid communication with the secondary sedimentation tank 15. In the first stage a/O system, the nitrified liquid in the first aeration tank 12 is returned to the first anoxic tank 11 through the first nitrified liquid return line 103. In the second stage a/O system, the nitrified liquid in the second aeration tank 14 is returned to the second anoxic tank 13 through the second nitrified liquid return line 104. Further, the sludge in the secondary sedimentation tank 15 is returned to the first anoxic tank 11 through the first sludge return line 105. It is to be noted that the sludge in the secondary sedimentation tank 15 may also be returned to the second anoxic tank 13 through the first sludge return line 105.
The high ammonia nitrogen organic wastewater can enter the first anoxic tank 11 through the first water inlet pipeline 101 and enter the second anoxic tank 13 through the second water inlet pipeline 102. The first water inlet line 101 and the second water inlet line 102 are parallel lines. In addition, the water outlet line 106 of the first aeration tank 112 is in fluid communication with the second anoxic tank 13. The arrangement is such that the first stage A/O system and the second stage A/O system are in a series and parallel relationship simultaneously.
First anoxic pond volume 3700m3The volume of the first aeration tank is 7700m3Second anoxic pond volume 3700m3The volume of the second aeration tank is 7700m3Surface load of secondary sedimentation tank is 0.75m3/(m2H), installing 4 underwater propellers in the first anoxic pond and the second anoxic pond, wherein the power of the propellers is 2.5kW, installing 3 magnetic suspension fans, the power of the fans is 200kW, and installing 287 sets of HS forced-cutting aerators. The reflux ratio of nitrifying liquid from the first aeration tank to the first anoxic tank is 4:1, and the second aeration tank is used for carrying out aerationThe reflux ratio of nitrifying liquid from the tank to the second anoxic tank is 4:1, and the reflux ratio of sludge is 1.5: 1. COD of outlet water from 107 after reconstruction<30mg/L, ammonia nitrogen in effluent<1mg/L, total nitrogen of effluent<8 mg/L. The treated wastewater can be discharged through the outlet line 108 of the secondary sedimentation tank 15.
Example 2
The product of the waste water produced in a large pharmaceutical factory comprises veterinary drugs (tilmicosin, tilmicosin phosphate, flunixin meglumine and the like), semisynthetic antibiotics, cephalosporins, tylosin, salinomycin, spectinomycin, acetylspiramycin, abamectin, 7ACA and the like. Designed water volume 10500m3And d, influent COD4500mg/L and total influent nitrogen 400 mg/L.
The sewage treatment apparatus of this embodiment is constructed as shown in FIG. 2. The biochemical treatment of this example employs a two-stage a/O treatment system comprising two identical two-stage a/O series, the direct connection of the first anoxic tank, the first aeration tank, the second anoxic tank, and the second aeration tank of each series being the same as that shown in example 1. The difference is that the waste water is input into each series after being input through the water inlet main pipeline 200, and the water outlet pipeline of each series of secondary sedimentation tanks is communicated with the fluid of the tertiary sedimentation tank 26.
Taking one of the series as an example, the first anoxic tank volume is 4500m3Volume of the first aeration tank is 16500m3The volume of the second anoxic pond is 4500m3Volume of the second aeration tank is 16500m3Surface load of secondary sedimentation tank is 0.5m3/(m2H), installing 4 underwater propellers in the first anoxic pond and the second anoxic pond, wherein the power of the propellers is 3.1kW, installing 6 magnetic suspension fans, the power of the fans is 200kW, and installing a set of HS forced-cutting aerators 540. The nitrifying liquid reflux ratio of O1 to A1 is 8:1, the nitrifying liquid reflux ratio of O2 to A2 is 8:1, and the sludge reflux ratio is 2: 1. The MLSS in the system is 10g/L, and the DO at the tail end of each aeration tank (24,34) is 4-6 mg/L. COD of effluent<300mg/L, ammonia nitrogen in effluent<3mg/L, total nitrogen of effluent<15 mg/L. The treated wastewater can be discharged through the outlet line 209 of the tertiary sedimentation tank 26.
Example 3
The pharmaceutical types of the sewage treatment plants in a certain pharmaceutical park comprise aureomycin, aureomycin hydrochloride and terramycinPlain, penicillin, coenzyme Q10, pesticide, veterinary drug, enzyme preparation, etc. Design water quantity 12000m3D, inflow COD10000mg/L, and inflow total nitrogen 800 mg/L.
The sewage treatment apparatus of this example comprises four two-stage A/O trains. Taking one of the series as an example, the first anoxic tank volume 6100m3First aeration tank volume 17000m3The volume of the second anoxic tank is 6100m3Second aeration tank volume 17000m3Surface load of secondary sedimentation tank is 0.5m3/(m2H), installing 4 underwater propellers in the first anoxic pond and the second anoxic pond, wherein the power of the propellers is 3.1kW, installing 6 magnetic suspension fans, the power of the fans is 200kW, and installing a set of HS forced-cutting type aerators 560. The nitrifying liquid reflux ratio of O1 to A1 is 10:1, the nitrifying liquid reflux ratio of O2 to A2 is 10:1, and the sludge reflux ratio is 2: 1. The MLSS in the system is 12-15 g/L, and the DO at the tail end of each aeration tank is 4-6 mg/L. COD of effluent<60mg/L, ammonia nitrogen in effluent<5mg/L, total nitrogen of effluent<15mg/L。
The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.

Claims (10)

1. A wastewater treatment device based on two-stage A/O process is characterized by comprising a first-stage A/O system, a second-stage A/O system and a secondary sedimentation tank;
the first stage A/O includes:
a first anoxic tank and a first aeration tank, which are connected in series with each other;
the first water inlet pipeline is used for inputting wastewater to be treated into the first anoxic pond;
a first water outlet line for outputting the wastewater treated by the first anoxic tank and the first aeration tank from the first aeration tank;
a first nitrified liquid return line for returning the nitrified liquid in the first aeration tank to the first anoxic tank;
the second segment A/O includes:
a second anoxic tank and a second aeration tank, which are connected in series with each other;
the second water inlet pipeline is used for inputting wastewater to be treated into the second anoxic pond;
a second water outlet line for outputting the wastewater treated by the second anoxic tank and the second aeration tank from the second aeration tank;
a second nitrified liquid return line for returning the nitrified liquid in the second aeration tank to the second anoxic tank;
wherein the secondary sedimentation tank is in fluid communication with the second water outlet line, and sludge in the secondary sedimentation tank is refluxed to the first anoxic tank and/or the second anoxic tank through a first sludge reflux line;
wherein the first water inlet line and the second water inlet line are arranged in parallel;
wherein the first water outlet line is in fluid communication with the second anoxic tank.
2. The wastewater treatment plant according to claim 1, wherein the first anoxic tank and the first aeration tank are configured as an integrated cycle.
3. The wastewater treatment plant according to claim 1, wherein the second anoxic tank and the second aeration tank are configured as an integrated cycle.
4. The wastewater treatment plant according to claim 1, characterized in that said first anoxic tank and/or said second anoxic tank comprise stirring means.
5. The wastewater treatment plant of claim 4 based on a two stage A/O process, wherein the agitation means comprises one or more of an underwater propeller and a vertical agitator.
6. The wastewater treatment plant according to claim 1, wherein the first aeration tank and the second aeration tank comprise aeration means.
7. The wastewater treatment plant according to claim 6 based on a two-stage A/O process, characterized in that the aeration device comprises a HS high-shear aerator manufactured by Shanghai Kentum environmental engineering Limited.
8. The wastewater treatment device based on the two-stage A/O process as claimed in claim 1, wherein the volume ratio of the first anoxic tank to the second anoxic tank is 1: 1-2: 1.
9. The wastewater treatment apparatus according to claim 1, wherein the first aeration tank and the second aeration tank are divided into 2 to 6 compartments.
10. The wastewater treatment plant according to claim 9, characterized in that the ratio of the length and width of each gallery of the first aeration tank and the second aeration tank is (4:1) - (10: 1).
CN202021807339.XU 2020-06-04 2020-08-26 Wastewater treatment device based on two-stage A/O process Active CN213326938U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010499844 2020-06-04
CN2020104998440 2020-06-04

Publications (1)

Publication Number Publication Date
CN213326938U true CN213326938U (en) 2021-06-01

Family

ID=76099624

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202010527460.5A Pending CN113754058A (en) 2020-06-04 2020-06-11 Wastewater treatment device and method based on two-stage A/O process
CN202021807339.XU Active CN213326938U (en) 2020-06-04 2020-08-26 Wastewater treatment device based on two-stage A/O process

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN202010527460.5A Pending CN113754058A (en) 2020-06-04 2020-06-11 Wastewater treatment device and method based on two-stage A/O process

Country Status (1)

Country Link
CN (2) CN113754058A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113754058A (en) * 2020-06-04 2021-12-07 上海心缘环境工程有限公司 Wastewater treatment device and method based on two-stage A/O process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115536142A (en) * 2022-10-31 2022-12-30 芬欧汇川(中国)有限公司 Adjustable wastewater treatment apparatus and method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5650069A (en) * 1995-09-08 1997-07-22 Kruger, Inc. Dual-stage biological process for removing nitrogen from wastewater
CN101337740B (en) * 2008-08-13 2012-05-23 山东美泉环保科技有限公司 Two-stage water supply bio denitrification system and process thereof
CN102040315A (en) * 2010-10-21 2011-05-04 兖矿集团有限公司 Method for treating high ammonia nitrogen wastewater by two-stage A/O process
CN102633359B (en) * 2012-04-23 2013-06-12 中蓝连海设计研究院 Method for treating total nitrogen of nitrogen-containing chemical wastewater
CN104591507B (en) * 2015-02-04 2016-05-25 中蓝连海设计研究院 The quick start method of total nitrogen in a kind of two-part A/O PROCESS FOR TREATMENT nitrogenous effluent
CN105800783B (en) * 2016-03-26 2019-03-15 武汉森泰环保股份有限公司 A kind of method of ammonia synthesizing industry denitrogenation of waste water
CN106277329B (en) * 2016-10-11 2019-10-18 临邑禹王植物蛋白有限公司 A method of utilizing twin-stage anoxic/aerobic technical treatment protein production waste water
CN107473508A (en) * 2017-08-28 2017-12-15 福建微水环保股份有限公司 A kind of environmental microorganism and segmental influent two-stage AO removes the method for treating water of total nitrogen
CN113754058A (en) * 2020-06-04 2021-12-07 上海心缘环境工程有限公司 Wastewater treatment device and method based on two-stage A/O process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113754058A (en) * 2020-06-04 2021-12-07 上海心缘环境工程有限公司 Wastewater treatment device and method based on two-stage A/O process

Also Published As

Publication number Publication date
CN113754058A (en) 2021-12-07

Similar Documents

Publication Publication Date Title
CN102633359B (en) Method for treating total nitrogen of nitrogen-containing chemical wastewater
CN101602541B (en) Biological sewage treatment technology and biological sewage treatment device
CN108046518B (en) Enhanced nitrogen and phosphorus removal device and method for low-carbon source sewage
CN106315853B (en) Oxidation ditch membrane bioreactor and sewage treatment process and application thereof
CN104445833B (en) A kind of method of wastewater biochemical denitrogenation
CN213326938U (en) Wastewater treatment device based on two-stage A/O process
CN213266150U (en) Nitrogen and phosphorus removal system
CN109264859A (en) A2O2Sewage disposal system and its processing method
CN201338965Y (en) Biological sewage treatment device
CN112551817A (en) Mixed wastewater integrated sewage treatment system
CN103395882A (en) Processing method and processing apparatus of high ammonia-nitrogen wastewater
CN103787501B (en) The aerobic series connection biochemistry pool of multi-stage anaerobic and the denitrogenation method to leather-making waste water thereof
CN204752469U (en) Processing apparatus of decentralized high ammonia -nitrogen concentration sewage
KR100415831B1 (en) A oxidation dith drain high treatment apparatus
CN206069649U (en) Integrated sewage disposal water cleaning systems
CN211170063U (en) Integrated equipment with enhanced dephosphorization and denitrification functions
CN214192924U (en) Waste water processing system is slaughtered to biological method
CN209367927U (en) A kind of high concentration organic nitrogen waste water dis posal equipment
CN205061691U (en) Biological sewage treatment system of not sectionalized membrane
CN210419440U (en) MBR membrane bioreactor sewage treatment system
CN112174324A (en) Leachate biochemical section treatment system and method for efficient denitrification
CN207108603U (en) A2O2Sewage disposal system
KR101019070B1 (en) Advanced treatment apparaters for sewage improve the existing activated sludge treatment plant and method advanced treatment using of the same
CN203402963U (en) High-concentration ammonia-nitrogen wastewater treatment device
CN213327213U (en) Wastewater treatment device for nitrogen and phosphorus removal

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20231201

Address after: No. 9, Lane 65, Huandong 1st Road, Fengjing Town, Jinshan District, Shanghai, 200000 (Xingteng Economic Community)

Patentee after: Vyt Environmental Technology (Shanghai) Co.,Ltd.

Address before: Room 612, building 3, 245 Jiachuan Road, Xuhui District, Shanghai, 200237

Patentee before: Shanghai Xinyuan Environmental Engineering Co.,Ltd.