CN115196749A - anoxic-Orbal combined device for treating mixed sewage - Google Patents
anoxic-Orbal combined device for treating mixed sewage Download PDFInfo
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- CN115196749A CN115196749A CN202210808722.4A CN202210808722A CN115196749A CN 115196749 A CN115196749 A CN 115196749A CN 202210808722 A CN202210808722 A CN 202210808722A CN 115196749 A CN115196749 A CN 115196749A
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
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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
- C02F2209/40—Liquid flow rate
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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
Abstract
The invention discloses an anoxic-Orbal combined device for treating mixed sewage, which comprises an Orbal oxidation ditch with a water inlet and a water outlet, a pre-anoxic pond and a sedimentation pond, wherein the pre-anoxic pond comprises a first adjusting chamber, a first reaction chamber, a water inlet and a water outlet, an acid-alkali liquor adding meter and a stirrer are arranged in the first adjusting chamber, and a carbon source adding meter and a stirrer are arranged in a second adjusting chamber; the sedimentation tank comprises a first coagulation chamber, a second reaction chamber, a sedimentation chamber, a water inlet and a water outlet, wherein the first coagulation chamber is provided with a coagulant addition meter and a stirrer, and the second reaction chamber is provided with a stirrer; the water inlet of the Orbal oxidation ditch is connected with the water outlet of the pre-anoxic pond through a pipeline, and the water outlet of the Orbal oxidation ditch is connected with the water inlet of the sedimentation pond through a pipeline. The anoxic-Orbal combined device can treat sewage with abnormal and obviously higher pollutant content until the sewage reaches the discharge standard.
Description
Technical Field
The invention relates to an anoxic-Orbal combined device for treating mixed sewage.
Background
In recent years, peripheral enterprises accelerate the transformation and upgrade of traditional industries to adapt to economic development, so that the scale of industrial enterprises is gradually increased, and the discharged sewage contains various complex pollutants, wherein the sewage comprises high-nitrogen low-carbon sewage, medical sewage, landfill leachate, domestic sewage and other various types of sewage. The high-nitrogen low-carbon sewage has the characteristics of high ammonia nitrogen, low carbon source, insufficient carbon source in the denitrification process, low total nitrogen removal rate and poor biodegradability. Routine detection indexes of Chemical Oxygen Demand (COD), total nitrogen, total phosphorus and the like of medical sewageClose to domestic sewage, but the special discharge source and strong harmfulness of the domestic sewage cause the specificity of medical sewage. The landfill leachate has high COD, ammonia nitrogen and metal ion concentration, many carcinogens and imbalanced microorganism nutrition proportion in the leachate. In the present stage of sewage treatment process, CODcr and five-day Biochemical Oxygen Demand (BOD) 5 ) pH and suspended matter (SS) indexes reach the standard discharge requirement, but the ammonia nitrogen index is far from reaching the effluent requirement, and mixed sewage is an industrial problem. The advantages of anaerobic, anoxic and aerobic micro environments of an Orbal oxidation ditch are outstanding, the denitrification effect is good, the occupied area and the investment cost are low, but because the content of ammonia nitrogen and organic nitrogen in mixed sewage is very high, the emission standard is difficult to reach by the treatment of an individual Orbal oxidation ditch, the discharge standard is difficult to reach by the treatment of the individual Orbal oxidation ditch, the CODcr is required to be not more than 500mg/L, the content of ammonia nitrogen is not more than 12mg/L, the total nitrogen is not more than 40mg/L, the total phosphorus is not more than 3mg/L, and particularly when the content of pollutants in the mixed sewage is abnormal and obviously high, the emission standard is difficult to reach, so the improvement is urgently needed.
Disclosure of Invention
In order to solve the problem that the existing single Orbal oxidation ditch is difficult to reach the discharge standard when treating sewage containing high-concentration pollutants, and particularly difficult to reach the discharge standard when the pollutant content is abnormal and obviously higher, the invention provides an anoxic-Orbal combined device for treating mixed sewage.
The invention relates to an anoxic-Orbal combined device for treating mixed sewage, which comprises an Orbal oxidation ditch with a second water inlet and a second water outlet, a pre-anoxic pond and a sedimentation pond, wherein the pre-anoxic pond comprises a regulating chamber, a first reaction chamber, a first water inlet and a first water outlet, the regulating chamber comprises a first regulating chamber and a second regulating chamber which are separated by a first partition plate with the suspended lower end and communicated, the second regulating chamber is positioned between the first regulating chamber and the first reaction chamber, the first regulating chamber is communicated with the first water inlet of the pre-anoxic pond, an acid-alkali liquid adding meter and a first stirrer are arranged in the first regulating chamber, and a carbon source adding meter and a second stirrer are arranged in the second regulating chamber;
the sedimentation tank comprises a coagulation chamber, a sedimentation chamber, a third water inlet and a third water outlet, the coagulation chamber comprises a first coagulation chamber and a second reaction chamber which are communicated and separated by a second partition plate with a through hole, the second reaction chamber is positioned between the sedimentation chamber and the first coagulation chamber, the first coagulation chamber is communicated with the third water inlet of the sedimentation tank and is provided with a coagulant adding meter and a third stirrer, and the second reaction chamber is internally provided with a fourth stirrer;
the second water inlet of the Orbal oxidation ditch is connected with the first water outlet of the pre-anoxic tank through a pipeline, and the second water outlet of the Orbal oxidation ditch is connected with the third water inlet of the sedimentation tank through a pipeline.
In order to flexibly control the oxygen content, the Orbal oxidation ditch is provided with an anaerobic chamber, an anoxic chamber, an aerobic chamber and an aeration head, wherein the bottom of each chamber is provided with a turntable, and the aeration head is positioned on the turntable.
In order to prevent the reduction of the water flow speed, reduce the damage to the pump and ensure that the dosing reaction is more sufficient, the lower end of the first partition plate is bent towards the first adjusting chamber to form a bending angle; the bending angle is preferably 135 °.
Has the beneficial effects that: according to the anoxic-Orbal combined device, the water inlet of the Orbal oxidation ditch is connected with the pre-anoxic tank, the water outlet of the Orbal oxidation ditch is connected with the sedimentation tank, the pre-anoxic tank is additionally provided with the second regulating chamber and the carbon source adding meter for adding the carbon source, the sedimentation tank is additionally provided with the second reaction chamber, sewage can reach the discharge standard after being treated, especially when the content of pollutants in the sewage is abnormal and is obviously higher, the sewage can reach the discharge standard after being treated, and the problem that the discharge standard is difficult to reach when the Orbal oxidation ditch is treated independently in the prior art is solved; the bottom of each chamber of the Orbal oxidation ditch is provided with an aeration turntable instead of an aeration head with a fixed position, so that the oxygen content can be flexibly controlled; bending the lower end of the first partition plate towards the first adjusting chamber to form a bending angle, wherein the bending angle is preferably 135 degrees, the water flow speed is prevented from being slowed down, the damage to the pump is reduced, and the dosing reaction is more sufficient.
Drawings
FIG. 1 is a schematic diagram of the hypoxia-Orbal combination according to the present invention;
FIG. 2 is a schematic diagram of the pre-anoxic tank in the anoxic-Orbal combination apparatus of the present invention;
FIG. 3 is a schematic view of the structure of the Orbal oxidation ditch in the anoxic-Orbal cluster apparatus of the present invention;
FIG. 4 is a schematic diagram of the configuration of the settling tank in the anoxic-Orbal combination according to the present invention;
in the figure, 1, a pre-anoxic tank; 1-1, a first separator; 1-2, a first conditioning chamber; 1-3, a second regulating chamber; 1-4, a first reaction chamber; 1-5, a first water inlet; 1-6, a first water outlet; 1-7, adding and metering an acid-base solution; 1-8, a carbon source adding meter; 1-9, a first stirrer; 1-10, a second stirrer; 2. an Orbal oxidation ditch; 2-1 and a second water inlet; 2-2, a second water outlet; 2-3, a turntable; 2-4, a blower; 2-5, a flow impeller; 3. a sedimentation tank; 3-1, a third water inlet; 3-2, a third water outlet; 3-3, a first coagulation chamber; 3-4, a second reaction chamber; 3-5, a settling chamber; 3-6, a coagulant adding meter; 3-7, a third stirrer; 3-8, a fourth stirrer; 3-9 parts of a clear water chamber; 3-10 and a second clapboard.
Detailed Description
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.
Examples
As shown in fig. 1 to 4, an anoxic-Orbal combined apparatus for treating mixed sewage includes an Orbal oxidation ditch 2 having a second water inlet 2-1 and a second water outlet 2-2, a pre-anoxic tank 1, and a sedimentation tank 3. The pre-anoxic tank 1 comprises a regulating chamber, a first reaction chamber 1-4, a first water inlet 1-5 and a first water outlet 1-6, the regulating chamber comprises a first regulating chamber 1-2 and a second regulating chamber 1-3 which are separated and communicated through a first partition plate 1-1 with the lower end suspended in the air, the second regulating chamber 1-3 is positioned between the first regulating chamber 1-2 and the first reaction chamber 1-4, the first regulating chamber 1-2 is communicated with the first water inlet 1-5 of the pre-anoxic tank 1, an acid-alkali liquid adding meter 1-7 and a first stirrer 1-9 are arranged in the first regulating chamber 1-2, and a carbon source adding meter 1-8 and a second stirrer 1-10 are arranged in the second regulating chamber 1-3; the lower end of the first partition board 1-1 is bent towards the first adjusting chamber 1-2 to form a bending angle alpha, and the bending angle alpha is 135 degrees; the upper end of the partition board between the second adjusting chamber 1-3 and the first reaction chamber 1-4 is bent towards the first reaction chamber to prevent overflow; the structure of the pre-anoxic tank 1 is shown in fig. 2. The remaining structure of the pre-anoxic tank 1 is referred to the prior art.
The sedimentation tank 3 comprises a coagulation chamber, a sedimentation chamber 3-5, a clear water chamber 3-9, a third water inlet 3-1 and a third water outlet 3-2, the coagulation chamber comprises a first coagulation chamber 3-3 and a second reaction chamber 3-4 which are separated by a second partition plate 3-10 with a through hole and communicated with each other, the second reaction chamber 3-4 is positioned between the sedimentation chamber 3-5 and the first coagulation chamber 3-3, the first coagulation chamber 3-3 is communicated with the third water inlet 3-1 of the sedimentation tank 3, a coagulant adding meter 3-6 and a third stirrer 3-7 are arranged, and a fourth stirrer 3-8 is arranged in the second reaction chamber 3-4; the upper end of the peripheral wall enclosing the settling chamber 3-5 is bent towards the center to prevent overflow; the structure of the sedimentation tank 3 is shown in fig. 4. The rest structure of the sedimentation tank 3 is referred to the prior art.
A second water inlet 2-1 of the Orbal oxidation ditch 2 is connected with a first water outlet 1-6 of the pre-anoxic pond 1 through a pipeline, and a second water outlet 2-2 of the Orbal oxidation ditch 2 is connected with a third water inlet 3-1 of the sedimentation pond 3 through a pipeline. The Orbal oxidation ditch 2 is provided with an anaerobic chamber at the outer side, an anoxic chamber in the middle, an aerobic chamber at the inner side and an aeration head at the bottom, the bottom of each chamber is provided with a turntable 2-3, the aeration head is positioned on the turntable 2-3 and is connected with an external blower 2-4, and in addition, each chamber is provided with a flow impeller 2-5; the upper end of the partition plate between the anaerobic chamber and the anoxic chamber and the upper end of the partition plate between the anoxic chamber and the aerobic chamber are bent towards the center of the Orbal oxidation ditch to prevent overflow; the structure of the Orbal oxidation ditch 2 is shown in figure 3. The remaining structure of the Orbal oxidation ditch 2 is referred to the prior art.
The process of treating sewage by using the anoxic-Orbal combined device of the invention is as follows:
1) Mixed sewage in Changzhou city enters a first adjusting chamber 1-2 from a first water inlet 1-5 of a pre-anoxic tank 1 through a pipeline, an acid-alkali liquor adding meter 1-7 positioned at the upper part of the first adjusting chamber 1-2 is used for adding acid liquor or alkali liquor, the pH value of the sewage is adjusted to be about 7, and a first stirrer 1-9 of the first adjusting chamber 1-2 is used for stirring and mixing the sewage;
2) The sewage after acid and alkali regulation enters a second regulating chamber 1-3, a carbon source adding meter 1-8 positioned at the upper part of the second regulating chamber 1-3 is used for adding a carbon source, the C/N ratio of the sewage is regulated to be 20;
3) The sewage after stirring and mixing enters a first reaction chamber 1-4, is fully reacted in the first reaction chamber 1-4 and then is discharged through a first water outlet 1-6;
4) The discharged sewage enters an anaerobic chamber from a second water inlet 2-1 of the Orbal oxidation ditch 2 through a pipeline, a rotary disc 2-3 at the lower end of the anaerobic chamber rotates as required, dissolved oxygen in the anaerobic chamber is controlled to be kept at 0mg/L through aeration of an aeration head, and the sewage is stirred and pushed to flow out through a flow impeller 2-5;
5) The effluent sewage flows into an anoxic chamber, and dissolved oxygen in the anoxic chamber is controlled to be kept at about 0.2mg/L by rotating a turntable 2-3 in the anoxic chamber, and the effluent sewage is stirred and pushed to flow out by a flow pusher 2-5;
6) The effluent sewage flows into an aerobic chamber, and the dissolved oxygen in the aerobic chamber is controlled to be kept at about 2.0mg/L by rotating a turntable 2-3 in the aerobic chamber, and is stirred by a flow impeller 2-5 and pushed to flow out of a second water outlet 2-2 of the Orbal oxidation ditch 2;
7) Enabling the effluent sewage to flow into a first coagulation chamber 3-3 from a third water inlet 3-1 of a sedimentation tank 3 through a channel, adding a coagulant by a coagulant adding meter 3-6 positioned at the upper end of the first coagulation chamber 3-3, and stirring and mixing by a third stirrer 3-7;
8) The sewage after stirring and mixing flows into a second reaction chamber 3-4, and a fourth stirrer 3-8 positioned at the bottom of the second reaction chamber 3-4 is used for fully stirring and reacting;
9) The sewage after full reaction flows into a settling chamber 3-5 with an inclined plate arranged inside, and water flows into a clear water chamber 3-9 and is discharged through a third water outlet 3-2 under the action of gravity through the inclined plate.
The composition of the wastewater before and after the treatment in the anoxic-Orbal combination unit of the present invention is shown in tables 1 to 2, where Table 1 shows data measured before 20 days at 3 months in 2021 when the wastewater enters the anoxic-Orbal combination unit of the present invention, and Table 2 shows data measured after 21 days at 3 months in 2021 when the wastewater exits the anoxic-Orbal combination unit of the present invention.
Ammonia Nitrogen (NH) 3 -N) assay according to naesli reagent spectrophotometry in HJ 535-2009; total Phosphorus (TP) was determined according to ammonium molybdate spectrophotometry in GB/T11893-1989; total Nitrogen (TN) determination was based on alkaline potassium persulfate digestion uv spectrophotometry in HJ 636-2012; chemical oxygen demand (CODcr) was determined according to the dichromate method in HJ 828-2017; the pH was measured according to the electrode method in HJ 1147-2020.
TABLE 1
| Time | COD（mg/L） | NH3-N（mg/L） | TP（mg/L） | TN（mg/L） | pH |
| 8：30-10：30 | 104 | 15.2 | 1.73 | 21.6 | 7.16 |
| 10：30-12：30 | 118 | 14.5 | 1.80 | 22.8 | 7.06 |
| 12：30-14：30 | 146 | 15.8 | 1.86 | 26.6 | 7.18 |
| 14：30-16：30 | 135 | 16.2 | 1.82 | 29.6 | 7.14 |
| 16：30-18：30 | 438 | 22.6 | 4.06 | 43.2 | 6.98 |
| 18：30-20：30 | 136 | 17.0 | 2.02 | 23.8 | 7.22 |
| 20：30-22：30 | 98 | 15.3 | 1.73 | 21.6 | 7.23 |
| 22：30-00：30 | 608 | 20.9 | 5.11 | 45.5 | 6.93 |
| 00：30-2：30 | 86 | 16.9 | 1.83 | 23.5 | 7.06 |
| 2：30-4：30 | 109 | 16.2 | 1.93 | 22.8 | 7.30 |
| 4：30-6：30 | 129 | 15.7 | 2.15 | 22.8 | 7.42 |
| 6：30-8：30 | 100 | 15.8 | 1.90 | 23.4 | 7.24 |
TABLE 2
| Time | COD（mg/L） | NH3-N（mg/L） | TP（mg/L） | TN（mg/L） | pH（mg/L） |
| 8：30-10：30 | 15.6 | 0.19 | 0.03 | 3.98 | 7.38 |
| 10：30-12：30 | 14.2 | 0.19 | 0.03 | 3.80 | 7.42 |
| 12：30-14：30 | 14.4 | 0.21 | 0.07 | 4.25 | 7.44 |
| 14：30-16：30 | 13.0 | 0.21 | 0.08 | 4.03 | 7.41 |
| 16：30-18：30 | 15.3 | 0.22 | 0.10 | 4.06 | 7.37 |
| 18：30-20：30 | 12.5 | 0.23 | 0.10 | 4.08 | 7.37 |
| 20：30-22：30 | 12.4 | 0.21 | 0.15 | 4.04 | 7.35 |
| 22：30-00：30 | 12.2 | 0.21 | 0.13 | 3.89 | 7.36 |
| 00：30-2：30 | 16.2 | 0.22 | 0.16 | 4.05 | 7.26 |
| 2：30-4：30 | 15.8 | 0.22 | 0.16 | 4.01 | 7.26 |
| 4：30-6：30 | 16.8 | 0.21 | 0.13 | 4.35 | 7.32 |
| 6：30-8：30 | 17.0 | 0.23 | 0.15 | 4.19 | 7.34 |
As can be seen from tables 1-2, in Table 1, at 16:30-18:30 and 22:30-00: the pollutant data of 30 two periods are abnormal and are obviously higher than the upper limit of single Orbal oxidation ditch treatment, and after the treatment by the anoxic-Orbal combined device, each pollutant data reaches the emission standard.
The above-mentioned techniques not specifically mentioned refer to the prior art.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. An anoxic-Orbal combined device for treating mixed sewage comprises an Orbal oxidation ditch with a second water inlet and a second water outlet, and is characterized by further comprising a pre-anoxic pond and a sedimentation pond, wherein the pre-anoxic pond comprises a regulating chamber, a first reaction chamber, a first water inlet and a first water outlet, the regulating chamber comprises a first regulating chamber and a second regulating chamber which are separated and communicated through a first partition plate with the lower end suspended in the air, the second regulating chamber is positioned between the first regulating chamber and the first reaction chamber, the first regulating chamber is communicated with the first water inlet of the pre-anoxic pond, an acid-alkali solution adding meter and a first stirrer are arranged in the first regulating chamber, and a carbon source adding meter and a second stirrer are arranged in the second regulating chamber;
the sedimentation tank comprises a coagulation chamber, a sedimentation chamber, a third water inlet and a third water outlet, the coagulation chamber comprises a first coagulation chamber and a second reaction chamber which are communicated and separated by a second partition plate with a through hole, the second reaction chamber is positioned between the sedimentation chamber and the first coagulation chamber, the first coagulation chamber is communicated with the third water inlet of the sedimentation tank, a coagulant adding meter and a third stirrer are arranged, and a fourth stirrer is arranged in the second reaction chamber;
the second water inlet of Orbal oxidation ditch passes through the first delivery port of pipe connection oxygen deficiency pond in advance, and the second delivery port of Orbal oxidation ditch passes through the third inlet port of pipe connection sedimentation tank.
2. The anoxic-Orbal combination apparatus for treating mixed wastewater as set forth in claim 1, wherein the Orbal oxidation ditch has an anaerobic chamber, an anoxic chamber, an aerobic chamber and an aeration head, and a turntable is provided at the bottom of each chamber, and the aeration head is provided on the turntable.
3. The anoxic-Orbal combination according to claim 1 wherein the lower end of the first partition is bent toward the first conditioning chamber to form a bent angle.
4. The anoxic-Orbal combination according to claim 3 wherein the bend angle is 135 °.
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2022
- 2022-07-11 CN CN202210808722.4A patent/CN115196749A/en active Pending
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| US20030042199A1 (en) * | 2001-08-29 | 2003-03-06 | United States Filter Corporation | Wastewater treatment process |
| CN206051779U (en) * | 2016-08-28 | 2017-03-29 | 青岛市崂山区第二中学 | A kind of multi-function integrated sewage disposal device |
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| CN215327217U (en) * | 2021-04-17 | 2021-12-28 | 云南省设计院集团有限公司 | Improved micropore aeration oxidation ditch and ditch-shaped design structure |
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