CN109133496A - A kind of sanitary sewage dephosphorization denitrogenation efficient treatment process - Google Patents
A kind of sanitary sewage dephosphorization denitrogenation efficient treatment process Download PDFInfo
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- CN109133496A CN109133496A CN201810861428.3A CN201810861428A CN109133496A CN 109133496 A CN109133496 A CN 109133496A CN 201810861428 A CN201810861428 A CN 201810861428A CN 109133496 A CN109133496 A CN 109133496A
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- denitrogenation
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
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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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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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- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention provides a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process, raw sewage successively passes through anaerobic pond, anoxic pond, aerobic tank and sedimentation basin, the raw sewage that wherein a part of sludge is added with denitrification microbial inoculum with a part in sedimentation basin is back to anaerobic pond after denitrogenation bed jointly, and a part of mixed liquor flowed out in aerobic tank is then refluxed for by denitrogenation bed to anoxic pond after adding denitrification microbial inoculum；The first zeolite layer, metal sponge denitrogenation layer and the second zeolite layer are successively arranged in the denitrogenation bed from top to bottom.The present invention efficiently solves the problems, such as that traditional A2/O technique Nitrogen/Phosphorus Removal is bad, and will not significantly increase the hydraulic detention time of process system, will not generate secondary pollution.
Description
Technical field
The present invention relates to a kind of sewage treatment process, especially a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process.
Background technique
Sanitary sewage is the waste water being discharged in resident's daily life, is mainly derived from residential architecture and public building, is such as lived
Between residence, organ, school, hospital, shop, public place and industry hygiene etc..Sanitary sewage bring harm first is that rich
The excessive caused water pollution of nutrient laden pollution, the i.e. plant nutrient substances such as nitrogen, phosphorus content.
In existing built traditional wastewater treatment plant, A2/O technique is a kind of common process generallyd use, which exists
Add an anoxic pond in anaerobic-aerobic dephosphorization process, a part of mixed liquor that aerobic tank flows out is back to anoxic pond front end, with
Achieve the purpose that nitrify denitrogenation.A2/O technique can simultaneous phosphorus and nitrogen removal mechanism consist of two parts: first is that dephosphorization, in sewage
Phosphorus (DO < 0.3mg/L) under anaerobic state releases polyP bacteria, again by its more absorption under aerobic situation, with excess sludge
Form discharge system；Second is that denitrogenation, anoxic section will control DO < 0.5mg/L, due to the effect of simultaneous oxygen denitrifier, using in water
BOD as hydrogen donor (organic carbon source), by aerobic tank mixed liquor nitrate and nitrate reductase escape at nitrogen
Enter atmosphere, achievees the purpose that denitrogenation.Deoxidation is except in the technique of phosphorus ligands organic matter, the process flow is the simplest, always at the same time
Hydraulic detention time also less than other similar techniques.But denitrification effect can be big by return current ratio of the mixed liquid in tradition A2/O technique
Small influence, and a part of nitrate can be brought into anaerobic zone by returned sludge, the presence of nitrate can seriously affect polyP bacteria
Poly- phosphorus efficiency, phosphor-removing effect is greatly affected, thus the denitrogenation dephosphorizing of tradition A2/O technique is inefficient.
Therefore, how to improve on the basis of built A2/O traditional waste water treatment process to improve Nitrogen/Phosphorus Removal
The problem of as urgent need to resolve.A2/O technique generally is improved by way of adding chemical denitrogenation dephosphorizing agent in the prior art
Nitrogen/Phosphorus Removal, however the addition of chemical reagent can bring secondary pollution, so that wastewater treatment efficiency is affected.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process,
Solve the problems, such as that traditional A2/O technique Nitrogen/Phosphorus Removal is bad.
The technical solution adopted by the present invention to solve the technical problems is: a kind of sanitary sewage dephosphorization denitrogenation efficient process work
Skill, raw sewage successively pass through anaerobic pond, anoxic pond, aerobic tank and sedimentation basin, which is characterized in that wherein a part is dirty in sedimentation basin
Mud is back to anaerobic pond added with the raw sewage of denitrification microbial inoculum with a part after denitrogenation bed jointly, flows out in aerobic tank
A part of mixed liquor is then refluxed for by denitrogenation bed to anoxic pond after adding denitrification microbial inoculum；
Wherein, it is successively arranged the first zeolite layer, metal sponge denitrogenation layer and the second zeolite from top to bottom in the denitrogenation bed
Layer；The metal sponge denitrogenation layer the preparation method comprises the following steps:
S1 is by TiOSO4It is dissolved in the H that concentration is 2mol/L2SO4In solution, obtaining titanium ion concentration is the mixed of 0.015mol/L
Solution is closed, KNO is then added3It is 0.02mol/L to its concentration, adjusts pH value of solution to 4~5 with nitric acid and concentrated ammonia liquor, add
H2O2It is 0.015mol/L to its concentration, obtains the first mixed liquor；
Octadecyl trimethoxysilane is added to the mixed liquor for forming that its concentration is 80mL/L in dehydrated alcohol by S2, to
It is 5g/L that odium stearate to its concentration is added in this mixed liquor, obtains the second mixed liquor；
S3 mixes the ratio that the first mixed liquor and the second mixed liquor are 1:2 by volume, forms electrodeposit liquid；
S4 is anode by cathode, stainless steel of foam copper, in 180mA/cm under ultrasonic wave stirring2Electric current it is close
Lower electro-deposition 1.5 hours are spent, acquisition surface electro-deposition has TiO2The foam copper of nanocrystal；
The sodium acetate that nitric acid that mass percent concentration is 10% by S5, mass percent concentration are 40% is added sequentially to
In deionized water, cleaning solution is formed；Will through step S4, treated that foam copper is immersed in this cleaning solution, soaked under 45 DEG C of constant temperature
Bubble 10 minutes；
S6 will be fitted into the electric furnace under 1MPa nitrogen atmosphere through the cleaned foam copper of step S4, be burnt at 800 DEG C
Tying-in 20 minutes；Then it is furnace-cooled to room temperature, obtains the foam copper that surface sintering has dendroid nano titanium dioxide crystal, as institute
State sponge denitrogenation layer.
The positive effect of the present invention: the present invention improves traditional A2/O technique, is additionally arranged the design of denitrogenation bed, knot
The investment of denitrification microbial inoculum is closed, so that returned sludge successively passes through the first boiling together with a part of raw sewage with denitrification microbial inoculum
The filtering of rock layers is uniformly distributed, the denitrogenation deoxygenation of denitrogenation layer, the buffering absorption of the second zeolite layer processing so that returned sludge into
Nitrate nitrogen therein and nitric acid state oxygen are purged before entering anaerobic pond, on the one hand the effect of part of raw sewage is conducive to back
The dilution for flowing sludge is uniformly distributed, is on the other hand that certain carbon source is provided for denitrification, combines special sea by endogenous metabolism mode
Continuous denitrogenation layer design improves denitrification rate.The present invention passes through the sponge denitrogenation layer especially prepared, and inside forms three-dimensional space
Structure, branched nanocrystal be even more increase effectively sponge inner space position, this can for denitrification handle provide extremely
Advantageous condition, be the key that increase denitrification rate, and will not because of factors the cause sponge layer compression such as filtering pressure is excessive shape
At blocking or influencing flow velocity, finally to effectively improve hydraulic detention time total while denitrogenation dephosphorizing efficiency in entire technique
It does not have and rises appreciably.In addition, adding certain denitrification microbial inoculum in backflow mixed liquor then flows through denitrogenation bed, can flow back
Mixed liquor carries out maximum denitrogenation processing before being back to anoxic pond, so that integrated artistic when return current ratio of the mixed liquid is larger
Denitrification effect will not be significantly affected.The present invention efficiently solves that traditional A2/O technique Nitrogen/Phosphorus Removal is bad to ask
Topic, and the hydraulic detention time of process system will not be significantly increased, secondary pollution will not be generated.
Detailed description of the invention
Fig. 1 is the process flow diagram of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of denitrogenation bed described in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of uniform board described in the embodiment of the present invention；
Fig. 4 is the process flow diagram of comparative example 1 of the present invention.
Specific embodiment
The preferred embodiment of the present invention and comparative example are described in detail with reference to the accompanying drawing.
Embodiment
Referring to Fig.1, the preferred embodiment of the present invention provides a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process, raw sewage according to
It is secondary to be handled by anaerobic pond, anoxic pond, aerobic tank and sedimentation basin, which is characterized in that wherein a part of sludge (reflux in sedimentation basin
Sludge) with a part anaerobic pond is back to after denitrogenation bed jointly added with the raw sewage of denitrification microbial inoculum, it is flowed in aerobic tank
A part of mixed liquor out is then refluxed for by denitrogenation bed to anoxic pond after adding denitrification microbial inoculum；
Wherein, as shown in Fig. 2, the denitrogenation bed includes a shell 1, it is successively arranged the first zeolite from top to bottom in shell 1
Layer 4, metal sponge denitrogenation layer 5 and the second zeolite layer 6；The metal sponge denitrogenation layer the preparation method comprises the following steps:
S1 is by TiOSO4It is dissolved in the H that concentration is 2mol/L2SO4In solution, obtaining titanium ion concentration is the mixed of 0.015mol/L
Solution is closed, KNO is then added3It is 0.02mol/L to its concentration, adjusts pH value of solution to 4~5 with nitric acid and concentrated ammonia liquor, add
H2O2It is 0.015mol/L to its concentration, obtains the first mixed liquor；
Octadecyl trimethoxysilane is added to the mixed liquor for forming that its concentration is 80mL/L in dehydrated alcohol by S2, to
It is 5g/L that odium stearate to its concentration is added in this mixed liquor, obtains the second mixed liquor；
S3 mixes the ratio that the first mixed liquor and the second mixed liquor are 1:2 by volume, forms electrodeposit liquid；
S4 is anode by cathode, stainless steel of foam copper, in 180mA/cm under ultrasonic wave stirring2Electric current it is close
Lower electro-deposition 1.5 hours are spent, acquisition surface electro-deposition has TiO2The foam copper of nanocrystal；
The sodium acetate that nitric acid that mass percent concentration is 10% by S5, mass percent concentration are 40% is added sequentially to
In deionized water, cleaning solution is formed；Will through step S4, treated that foam copper is immersed in this cleaning solution, soaked under 45 DEG C of constant temperature
Bubble 10 minutes；
S6 will be fitted into the electric furnace under 1MPa nitrogen atmosphere through the cleaned foam copper of step S4, be burnt at 800 DEG C
Tying-in 20 minutes；Then it is furnace-cooled to room temperature, obtains the foam copper that surface sintering has dendroid nano titanium dioxide crystal, as institute
State metal sponge denitrogenation layer 5.
Preferably, the top of first zeolite layer 4 is additionally provided with taper uniform board 3 (as shown in Figure 3) in shell 1, this uniform board 3
On be covered with through-hole 9；The top of uniform board 3 is additionally provided with barn door 2, is fixed on this barn door 2 dirty for conveying sewage and reflux
The return pipe 8 of mud mixture, the tip position of the outlet face uniform board 3 of this return pipe 8；The bottom of second zeolite layer 6 is also set
Abacus 7.
First zeolite layer 4, which is that natural zeolite is ground, becomes particulate zeolite, 10~20 mesh of partial size；Second boiling
Rock layers 6, which are that natural zeolite is ground, becomes zeolite powder, 100~120 mesh of partial size.
Preferably, the returned sludge is the 40~60% of the total sludge weight of sedimentation basin, the denitrification added in raw sewage
The quality of microbial inoculum is 8th/5000000th to million/1000000ths of returned sludge quality；The denitrification microbial inoculum added in backflow mixed liquor
Quality be backflow mixed liquor quality hundred a ten thousandths to 5/1000000ths, backflow mixed liquor and the weight ratio of total mixed liquor are
1~3:7.
The denitrification microbial inoculum is advisable the denitrification microbial inoculum of emerging city Qing Tai cleanser Co., Ltd production.
Comparative example 1
Referring to Fig. 4, comparative example 1 of the present invention provides a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process (i.e. tradition A2/O
Technique), raw sewage successively passes through anaerobic pond, anoxic pond, aerobic tank and sedimentation basin processing, wherein a part of sludge in sedimentation basin
(returned sludge) is directly back to anaerobic pond, and a part of mixed liquor flowed out in aerobic tank is directly back to anoxic pond；Wherein return
The amount for flowing sludge and backflow mixed liquor is same as the previously described embodiments.
Comparative example 2
Comparative example 2 of the present invention provides a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process, uniquely not with above-described embodiment
Same place are as follows: used metal sponge denitrogenation layer 5 is not deposit the TiO2The original foam copper product of nanocrystal.
The denitrogenation dephosphorizing Comparative result of embodiment and comparative example is as follows:
| As a result | Embodiment | Comparative example 1 | Comparative example 2 |
| Nitrogen-removing rate | 92.3% | 61.8% | 67.3% |
| Dephosphorizing rate | 95.7% | 69.4% | 74.6% |
It is above-described to be merely a preferred embodiment of the present invention, it should be understood that the explanation of above embodiments is only used
In facilitating the understanding of the method and its core concept of the invention, it is not intended to limit the scope of protection of the present invention, it is all of the invention
Any modification for being made within thought and principle, equivalent replacement etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process, raw sewage successively passes through anaerobic pond, anoxic pond, aerobic tank and sinks
Shallow lake pond, it is characterised in that: wherein a part of sludge is passed through with a part added with the raw sewage of denitrification microbial inoculum jointly in sedimentation basin
It is back to anaerobic pond after crossing denitrogenation bed, a part of mixed liquor flowed out in aerobic tank is after adding denitrification microbial inoculum by denitrogenation bed
It is then refluxed for anoxic pond；
Wherein, it is successively arranged the first zeolite layer, metal sponge denitrogenation layer and the second zeolite layer from top to bottom in the denitrogenation bed；Institute
State metal sponge denitrogenation layer the preparation method comprises the following steps:
S1 is by TiOSO4It is dissolved in the H that concentration is 2mol/L2SO4In solution, it is molten to obtain the mixing that titanium ion concentration is 0.015mol/L
Then KNO is added in liquid3It is 0.02mol/L to its concentration, adjusts pH value of solution to 4~5 with nitric acid and concentrated ammonia liquor, add H2O2Extremely
Its concentration is 0.015mol/L, obtains the first mixed liquor；
Octadecyl trimethoxysilane is added to the mixed liquor for forming that its concentration is 80mL/L in dehydrated alcohol by S2, mixed to this
Closing and odium stearate to its concentration is added in liquid is 5g/L, obtains the second mixed liquor；
S3 mixes the ratio that the first mixed liquor and the second mixed liquor are 1:2 by volume, forms electrodeposit liquid；
S4 is anode by cathode, stainless steel of foam copper, in 180mA/cm under ultrasonic wave stirring2Current density under electricity
Deposition 1.5 hours, obtaining surface electro-deposition has TiO2The foam copper of nanocrystal；
The sodium acetate that nitric acid that mass percent concentration is 10% by S5, mass percent concentration are 40% be added sequentially to from
In sub- water, cleaning solution is formed；Will through step S4, treated that foam copper is immersed in this cleaning solution, impregnate 10 under 45 DEG C of constant temperature
Minute；
S6 will be fitted into the electric furnace under 1MPa nitrogen atmosphere through the cleaned foam copper of step S4, and warp is sintered at 800 DEG C
20 minutes；Then it is furnace-cooled to room temperature, obtains the foam copper that surface sintering has dendroid nano titanium dioxide crystal, the as described sea
Continuous denitrogenation layer.
2. a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process according to claim 1, it is characterised in that: described first
Zeolite layer 4, which is that natural zeolite is ground, becomes particulate zeolite, 10~20 mesh of partial size.
3. a kind of sanitary sewage dephosphorization denitrogenation efficient treatment process according to claim 1 or 2, it is characterised in that: described
Second zeolite layer 6, which is that natural zeolite is ground, becomes zeolite powder, 100~120 mesh of partial size.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810861428.3A CN109133496B (en) | 2018-08-01 | 2018-08-01 | Efficient dephosphorization and denitrification treatment process for domestic sewage |
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| CN201810861428.3A CN109133496B (en) | 2018-08-01 | 2018-08-01 | Efficient dephosphorization and denitrification treatment process for domestic sewage |
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| CN109133496A true CN109133496A (en) | 2019-01-04 |
| CN109133496B CN109133496B (en) | 2020-10-23 |
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| CN201810861428.3A Active CN109133496B (en) | 2018-08-01 | 2018-08-01 | Efficient dephosphorization and denitrification treatment process for domestic sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354192A (en) * | 2021-05-31 | 2021-09-07 | 江苏康源环保科技有限公司 | Urban domestic sewage combined biological nitrogen and phosphorus removal device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0137306B1 (en) * | 1995-02-24 | 1998-04-25 | Dohwa Tec Co Ltd | Apparatus for denitrification and dephosphorization of sewage |
| US20110068058A1 (en) * | 2008-05-20 | 2011-03-24 | Beijing Ecojoy Water Technology Co., Ltd. | Apparatus and process for treating wastewater |
| CN103304101A (en) * | 2013-06-27 | 2013-09-18 | 波鹰(厦门)科技有限公司 | Resource utilization and regeneration circulation utilization device for livestock and poultry breeding wastewater |
| CN205115141U (en) * | 2015-09-14 | 2016-03-30 | 天津大学 | Device based on SMFC and large -scale filamentous green algae jointly restore eutrophic water |
| CN105776746A (en) * | 2016-04-05 | 2016-07-20 | 北京北华中清环境工程技术有限公司 | Integrated wastewater treatment process and system for chemical industrial park |
-
2018
- 2018-08-01 CN CN201810861428.3A patent/CN109133496B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0137306B1 (en) * | 1995-02-24 | 1998-04-25 | Dohwa Tec Co Ltd | Apparatus for denitrification and dephosphorization of sewage |
| US20110068058A1 (en) * | 2008-05-20 | 2011-03-24 | Beijing Ecojoy Water Technology Co., Ltd. | Apparatus and process for treating wastewater |
| CN103304101A (en) * | 2013-06-27 | 2013-09-18 | 波鹰(厦门)科技有限公司 | Resource utilization and regeneration circulation utilization device for livestock and poultry breeding wastewater |
| CN205115141U (en) * | 2015-09-14 | 2016-03-30 | 天津大学 | Device based on SMFC and large -scale filamentous green algae jointly restore eutrophic water |
| CN105776746A (en) * | 2016-04-05 | 2016-07-20 | 北京北华中清环境工程技术有限公司 | Integrated wastewater treatment process and system for chemical industrial park |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354192A (en) * | 2021-05-31 | 2021-09-07 | 江苏康源环保科技有限公司 | Urban domestic sewage combined biological nitrogen and phosphorus removal device and method |
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