CN105668785A - Treatment method for municipal sewage through filling material and oxidation ditch combined process - Google Patents
Treatment method for municipal sewage through filling material and oxidation ditch combined process Download PDFInfo
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- CN105668785A CN105668785A CN201410650991.8A CN201410650991A CN105668785A CN 105668785 A CN105668785 A CN 105668785A CN 201410650991 A CN201410650991 A CN 201410650991A CN 105668785 A CN105668785 A CN 105668785A
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- oxidation ditch
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
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Abstract
The invention belongs to the technical field of sewage treatment, and concretely provides a treatment method for municipal sewage through a filling material and oxidation ditch combined process. According to the invention, an oxidation ditch is divided into an aerobic zone, an anoxic zone and a pre anaerobic zone. The method comprises a process flow as shown in a figure 1 in the specification. The method comprises the following steps: allowing sewage to enter an anaerobic pool through a water inlet pipe, subjecting the sewage to stirring and mixing with reflux sludge in the anaerobic pool, and allowing the obtained mixture to enter the anoxic zone of the oxidation ditch through the bottom part of the anaerobic pool; uniformly adding a filling material into the oxidation ditch; allowing the sewage to flow through the aerobic zone of the oxidation ditch, allowing one part of the sewage to enter a secondary sedimentation pool through an outlet of the oxidation ditch, and allowing the other part of the sewage to return to the anoxic zone and continue circulation flow in the oxidation ditch; subjecting the sewage in the secondary sedimentation pool to sludge-water separation, and discharging supernatant liquid as effluent water of a system; and allowing sedimented activated sludge to enter a sludge well through a channel located at the bottom part of the secondary sedimentation pool, subjecting the sludge to refluxing into the anaerobic pool through a sludge relux pump in the sludge well and carrying out mixing with influent water, and discharging partial residual sludge out of the system through a sludge pump. The invention has the following beneficial effects: the treatment method provided by the invention has significant effects on removal of COD, NH+4N, TN and TP, and enables the quality of the effluent water of the oxidation ditch to be stably superior to the standard of a first-grade B, wherein a part of indexes reach the standard of a first-grade A.
Description
Technical field
The invention belongs to sewage treatment area, the method utilizing filler oxidation ditch combination process Treating Municipal Sewage exactly specifically.
Background technology
Activated sludge process and biomembrance process are two great tradition technology types of sewage aerobic biological treatment. The advantage of activated sludge process is that the water yield is big, pollutants removal rate is high and effluent quality is good in process, and its various deformation techniques can take into account denitrogenation dephosphorizing; Shortcoming is that operation is not sufficiently stable, easily occurs sludge bulking, excess sludge production big, the treatment effect of sewage of low concentration is poor. Having the advantages of of biomembrance process is stable, sludge yield is few, strong to ammonia nitrogen and Recalcitrant chemicals removal ability, capacity of resisting impact load strong, it is relatively easy to manage; Its shortcoming is that the part molecule not free settling that biofilm detachment produces causes delivery turbidity higher, and the removal effect of total nitrogen and total phosphorus is poor. Biomembrance process is had a significant impact by the performance of filler, is once once limiting the scale of biomembrance process practical application.
Summary of the invention
It is an object of the invention to based on oxidation ditch pilot scale model, in oxidation ditch, put into a certain proportion of floating stuffing, constitute the combined oxidation ditch that floating type combines with attached type, for Treating Municipal Sewage. Being studied by the denitrogenation dephosphorizing mechanism after adjusting each operational factor oxidation ditch being added filler and variation characteristic, find the optimum operating condition of combined oxidation ditch technique, make oxidation ditch stable effluent quality be better than one-level B standard, part index number reaches one-level A standard.
The present invention, for reaching above-mentioned technical purpose, adopts the technical scheme that: oxidation ditch is divided into aerobic section, anoxia section and preposition anaerobic zone. Technological process is as shown in Figure 1. Sewage is introduced into anaerobic pond by water inlet pipe, by entering oxidation ditch anoxic zone bottom anaerobic pond after anaerobic pond mixes with returned sludge stirring. Oxidation ditch uniformly adds filler. Sewage flows through oxidation ditch aerobic zone, and the outlet of a part of oxidized ditch enters second pond, and another part returns to anoxic zone, continues at oxidation ditch internal circulation flow. Entering the sewage of second pond through mud-water separation, supernatant is discharged as system water outlet. The activated sludge of sedimentation is entered sewer catch basin by second pond foot passage, and sludge reflux to anaerobic pond is mixed by the sludge reflux pump in sewer catch basin with water inlet, and some residual mud is discharged system by sludge pump.
Described filler is floating stuffing.
The beneficial effects of the present invention is: the present invention is to COD, NH+ 4The removal of N, TN, TP all has appreciable impact, makes oxidation ditch stable effluent quality be better than one-level B standard, and part index number reaches one-level A standard.
Accompanying drawing explanation
Fig. 1 is the workflow diagram of the present invention.
Detailed description of the invention
Oxidation ditch is divided into aerobic section, anoxia section and preposition anaerobic zone. Technological process is as shown in Figure 1. Sewage is introduced into anaerobic pond by water inlet pipe, by entering oxidation ditch anoxic zone bottom anaerobic pond after anaerobic pond mixes with returned sludge stirring. Oxidation ditch uniformly adds filler. Sewage flows through oxidation ditch aerobic zone, and the outlet of a part of oxidized ditch enters second pond, and another part returns to anoxic zone, continues at oxidation ditch internal circulation flow. Entering the sewage of second pond through mud-water separation, supernatant is discharged as system water outlet. The activated sludge of sedimentation is entered sewer catch basin by second pond foot passage, and sludge reflux to anaerobic pond is mixed by the sludge reflux pump in sewer catch basin with water inlet, and some residual mud is discharged system by sludge pump.
The construction features of polyhedron empty ball filler: overall have multiple blade in polyhedron empty ball shape, and surface is slightly coarse. Spheroid axis is hollow, sewage can free-flow between filler space, be not susceptible to biomembrane clogging.
Pilot-plant anaerobic pond dischargeable capacity 9m3, oxidation ditch dischargeable capacity 41m3. Respectively setting impeller one in anaerobic pond and oxidation ditch, be QJB series, impeller diameter 260mm, rotating speed 740r/min, power is 0.75kW. For mixing muddy water and promoting current, maintain oxidation ditch fluidised form. Water inlet pipe, returned sludge delivery pipe and excess sludge discharge pipe are equipped with spinner flowmeter with metered flow. Oxidation ditch aeration, based on inversed umbrella type surface aerating machine, opens blast aeration according to test dissolved oxygen demand in good time. Inversed umbrella type surface aerating machine selects SBQ060LC type vertical inverted umbrella shape turbine aerator, and the major parameter of equipment is: impeller diameter is 600mm, and impeller height is 220mm, power of motor: 1.5kW, oxygenation capacity: 2.85kgO2/ h. Blast aeration is evenly distributed on oxidation ditch side gallery. In aerating system, LSR25WJ type three leaves Roots blower selected by aerator, and oxygen transfer efficiency is 20%, air quantity 0.34m3/ min, blast 29.4kPa, rotating speed 1900r/min, power 0.75kW, the using and the reserved, totally two. Valve controlling flow is had between oxidation ditch outlet and second pond.
Floating stuffing oxidation ditch orthogonal test it is shown that DO is to system COD, NH+ 4The removal of N, TN, TP all has appreciable impact; R is to NH+ 4The removal of N-N, TN, TP has appreciable impact; The removal of TP is only had appreciable impact by SRT. Considering the influence degree of each factor, each factor proper level is respectively as follows: oxidation ditch outlet DO=0.8 ~ 1.2mg/L, return sludge ratio R=75 ~ 100%, sludge age SRT=11 ~ 15d.
Under the dosing rate of 30%. Floating stuffing oxidation ditch pilot reactor is biofilm success in the 25th day after adding suspended biological filler. Having found that the growth of nitrifier is slower than heterotrophic bacteria, the nitrifier propagation in biomembrane takes longer for. The length of biofilm time depends on the multiplication rate of nitrifier.
Claims (2)
1. the method for a filler oxidation ditch combination process Treating Municipal Sewage, oxidation ditch is divided into aerobic section, anoxia section and preposition anaerobic zone, it is characterized in that: sewage is introduced into anaerobic pond by water inlet pipe, by entering oxidation ditch anoxic zone bottom anaerobic pond after anaerobic pond mixes with returned sludge stirring; Oxidation ditch uniformly adds filler; Sewage flows through oxidation ditch aerobic zone, and the outlet of a part of oxidized ditch enters second pond, and another part returns to anoxic zone, continues at oxidation ditch internal circulation flow; Entering the sewage of second pond through mud-water separation, supernatant is discharged as system water outlet; The activated sludge of sedimentation is entered sewer catch basin by second pond foot passage, and sludge reflux to anaerobic pond is mixed by the sludge reflux pump in sewer catch basin with water inlet, and some residual mud is discharged system by sludge pump.
2. the method for filler Urban Sewage Treated by Oxidation Ditch Technology according to claim 1, it is characterised in that: described filler is floating stuffing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410650991.8A CN105668785A (en) | 2014-11-17 | 2014-11-17 | Treatment method for municipal sewage through filling material and oxidation ditch combined process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410650991.8A CN105668785A (en) | 2014-11-17 | 2014-11-17 | Treatment method for municipal sewage through filling material and oxidation ditch combined process |
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| Publication Number | Publication Date |
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| CN105668785A true CN105668785A (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410650991.8A Pending CN105668785A (en) | 2014-11-17 | 2014-11-17 | Treatment method for municipal sewage through filling material and oxidation ditch combined process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045022A (en) * | 2016-07-18 | 2016-10-26 | 程晨 | Oxidation ditch process and application method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2368839Y (en) * | 1998-05-27 | 2000-03-15 | 中国市政工程西南设计研究院 | Rotary aeration sewage treating apparatus |
| CN102690019A (en) * | 2012-05-08 | 2012-09-26 | 北京工业大学 | High-efficiency nitrogen and phosphorus synchronous removal method in treating low concentration wastewater |
| WO2014043547A4 (en) * | 2012-09-13 | 2014-05-22 | D.C. Water & Sewer & Authority | Method and apparatus for nitrogen removal in wastewater treatment |
| CN203668119U (en) * | 2014-01-23 | 2014-06-25 | 重庆市三峡水务有限责任公司 | Circulating turn-back flow oxidation ditch |
-
2014
- 2014-11-17 CN CN201410650991.8A patent/CN105668785A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2368839Y (en) * | 1998-05-27 | 2000-03-15 | 中国市政工程西南设计研究院 | Rotary aeration sewage treating apparatus |
| CN102690019A (en) * | 2012-05-08 | 2012-09-26 | 北京工业大学 | High-efficiency nitrogen and phosphorus synchronous removal method in treating low concentration wastewater |
| WO2014043547A4 (en) * | 2012-09-13 | 2014-05-22 | D.C. Water & Sewer & Authority | Method and apparatus for nitrogen removal in wastewater treatment |
| CN203668119U (en) * | 2014-01-23 | 2014-06-25 | 重庆市三峡水务有限责任公司 | Circulating turn-back flow oxidation ditch |
Non-Patent Citations (1)
| Title |
|---|
| 布暹: "悬浮填料氧化沟工艺处理城市污水的试验研究", 《重庆大学硕士学位论文》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045022A (en) * | 2016-07-18 | 2016-10-26 | 程晨 | Oxidation ditch process and application method thereof |
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Application publication date: 20160615 |
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