CN109626729A - A kind of method that the recycling of sanitary sewage organic matter couples iron autotrophic denitrification/nitrification denitrogenation and dephosphorization - Google Patents
A kind of method that the recycling of sanitary sewage organic matter couples iron autotrophic denitrification/nitrification denitrogenation and dephosphorization Download PDFInfo
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- CN109626729A CN109626729A CN201811597987.4A CN201811597987A CN109626729A CN 109626729 A CN109626729 A CN 109626729A CN 201811597987 A CN201811597987 A CN 201811597987A CN 109626729 A CN109626729 A CN 109626729A
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- organic matter
- sanitary sewage
- iron
- autotrophic denitrification
- nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F2101/105—Phosphorus compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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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
Abstract
The invention discloses a kind of methods that sanitary sewage organic matter recycles coupling iron autotrophic denitrification/nitrification denitrogenation and dephosphorization, which is characterized in that active carbon is made sufficiently to adsorb the organic matter in sanitary sewage；Iron compound is added in anoxic pond, removes nitrate nitrogen, nitrite nitrogen and phosphorus in sewage；Active carbon after absorption is added to water heating kettle, carries out hydro-thermal process；The ammoniacal nitrogen in sewage is converted nitrate nitrogen and nitrite nitrogen by nitrifier；Water part is back to anoxic pond, removes nitrate nitrogen and nitrite nitrogen by iron autotrophic denitrification process, remaining enters secondary settling tank and is precipitated；Water is discharged respectively with sludge, is finally reached the effect of organic matter recycling and denitrogenation and dephosphorization in sanitary sewage.Operating cost of the present invention is low, adds carbon source without outside, while realizing the efficient removal of the organic matter in sanitary sewage, total nitrogen, total phosphorus, the organic matter that can be recycled in sewage by hydro-thermal method and the carbonization for realizing organic matter and recycling.
Description
Technical field
The present invention relates to the sides that a kind of sanitary sewage organic matter recycles coupling iron autotrophic denitrification/nitrification denitrogenation and dephosphorization
Method belongs to sewage treatment field.
Background technique
As urbanization process is constantly accelerated in recent years in China, while urban population quantity increases, sanitary sewage discharge
Amount is also quickling increase.Sanitary sewage type is complicated, can be direct if being discharged into natural water not up to standard without processing or processing
It causes damages to resident's human health with natural environment.In order to realize the ensured sustained development development of urban construction process and ensure resident
It is healthy and safe, it is necessary to carry out the processing work of sanitary sewage." the urban wastewater treatment firm pollutant emission mark that country promulgates
It is quasi- " (GB 18918-2002) be made that indices in sewage after processing and be distinctly claimed, mainly control in level-one A standard
Project and highest allow concentration of emission are as follows: COD50mg/L, total nitrogen 15mg/L, ammonia nitrogen 5mg/L, total phosphorus 0.5mg/L.And with ring
Border manages increasingly strict trend, although " level-one A " has been peak demand in national standard, in actual items, has occurred
Large quantities of take " IV class water of earth's surface " or " quasi- IV class water " as the water project of discharge standard.
Currently, China is broadly divided into chemical method and bioanalysis to the processing technique of sanitary sewage.Chemical method refers in sewage
Middle investment chemical substance is mainly sewage by chemical reaction and effect of mass transmitting removal or conversion pollutant, its process object
In inorganic or organic (being difficult to biodegradable) dissolution substance or colloidal substance, but its higher cost, the change of investment
Secondary pollution may be caused to environment by learning substance.Biologic treating technique is common technique in current city domestic sewage processing.
Sewage Biological Treatment is using individual widely distributed in nature is small, metabolic nutrition type is various, adaptive capacity is strong
The treating method that the metabolism of microorganism purifies sewage income.At present, common biological carbon and phosphorous removal group technology
Such as multistage A/O-MBR, A2/O-MBBR and A2/O-MBR technique, is not able to satisfy increasingly strict effluent-disposal standard gradually,
C/N is low mainly due to water inlet for reason, carbon source competition, the problems such as sludge age contradiction and effluent nitrate-nitrogen concentration are high lead to total nitrogen (TN) and
Total phosphorus (TP) removal effect is bad.For above-mentioned nitrogen and phosphorus pollutants poor removal effect problem, urban wastewater treatment firm uses substantially
Add the methods of external carbon source, Optimizing Process Parameters and applicating new process technology.But these methods not only technical requirements and operation
Higher cost, and it is easy to produce secondary pollution, it cannot fundamentally solve sewage low-carbon source, carbon source competition and sludge age contradiction shadow
The problem of ringing denitrogenation dephosphorizing.And in traditional wastewater treatment process, organic matter after microorganism panning, is decomposed there are about 1/3,
Stablize, i.e. generation carbon dioxide, to aggravate greenhouse effects.
Active carbon pore structure rich in and biggish specific surface area have very strong adsorption energy to most of organic matter
Power, and active carbon is non-toxic and tasteless, is a kind of excellent adsorbent, is often used as the color in water removal or the peculiar smell in air
Deng.But in actual use, there is a problem of that saturated activity charcoal regeneration cost is high.Hydrothermal carbonization reaction is one typical
Exothermic process mainly reduces the content of O, H in raw material by being dehydrated with decarboxylic reaction, but its specific reaction process is very multiple
Miscellaneous, currently, the hydrothermal carbonization process received by most researchers is broadly divided into following several stages: (1) presoma hydrolyzes
At monomer, system pH decline；(2) monomer is dehydrated and induces polymerization reaction；(3) aromatization leads to the shape of final product
At.
Iron autotrophic denitrification refers to iron autotrophic denitrification bacterium using inorganic carbon compound as carbon source, using nitrate anion as electricity
Sub- receptor, fe and various forms of Fe (II) compound obtain energy by biological oxidation-reduction as electron donor
It measures and is nitrogen by nitrate, nitrate reductase.Each valence iron ion and phosphate radical shape being precipitated during iron autotrophic denitrification
At calcium phosphate precipitation, while achieving the effect that dephosphorization.
Summary of the invention
Technical problem solved by the invention is: a kind of method removing dirty Organic substance in water and denitrogenation dephosphorizing is provided,
The carbon material that recycling and acquisition to organic matter can be recycled can be completed at the same time.
To solve the above-mentioned problems, the technical scheme is that a kind of sanitary sewage organic matter recycling coupling iron autotrophy
The method of denitrification/nitrification denitrogenation and dephosphorization, which comprises the following steps:
Step 1): sanitary sewage and activated carbon raw material are added in adsorption tank, and stirring makes active carbon sufficiently adsorb life
Organic matter in sewage；
Step 2): adding iron compound in anoxic pond, and it is abundant that the sanitary sewage after activated carbon adsorption is passed through anoxic pond
It stops, removes nitrate nitrogen, nitrite nitrogen and the phosphorus in sewage；Active carbon after absorption is added to water heating kettle, is carried out at hydro-thermal
It manages, the organic carbon and charcoal of activated carbon adsorption activate in water-heat process, realize the regeneration of active carbon, obtain hydro-thermal charcoal；
Step 3): anoxic pond water outlet is passed through aerobic tank and sufficiently stops, and the ammoniacal nitrogen in sewage is converted nitre state by nitrifier
Nitrogen and nitrite nitrogen；
Step 4): aerobic tank water part is back to anoxic pond, removes nitrate nitrogen and Asia by iron autotrophic denitrification process
Nitrate nitrogen, remaining enters secondary settling tank and is precipitated；
Step 5): the water in secondary settling tank is discharged respectively with sludge, is finally reached organic matter recycling in sanitary sewage and takes off
Nitrogen and the effect of dephosphorization.
Preferably, the activated carbon raw material in the step 1) is any one or a few in coal, coconut husk and biomass.
Preferably, dosage of the activated carbon raw material in sanitary sewage is 2.0~8.0g/L in the step 1)；Stirring
Revolving speed is 150~250r/min, and mixing time is 2~8h.
Preferably, iron compound is iron plane flower, iron filings, reduced iron powder, ferrous salt, pyrite and red iron in the step 2)
Any one or a few in mine.
Preferably, the temperature of hydro-thermal process is 160~260 DEG C in the step 2), and the time is 2~6h, and active carbon is in water
Filling rate in hot kettle is the 50%~80% of water heating kettle inner product.
Preferably, it is reused in the hydro-thermal charcoal investment adsorption tank that the step 2) obtains.
Preferably, in the anoxic pond in the step 2) iron autotrophic denitrification condition be pH value 7~8, hydraulic retention 3~
8 hours.
The present invention realizes recycling and the carbon of organic matter using hydro-thermal method with the organic matter in activated carbon adsorption sanitary sewage
Change, and carry out denitrogenation dephosphorizing using iron autotrophic denitrification/nitration processes, can reach good effect.
Compared with prior art, the invention has the following advantages:
1. the organic matter that the present invention is tightly held by activated carbon by hydro-thermal method carbonization, is realized organic while cutting down organic matter
The carbonization and activation of object, and the carbon material persistently used is obtained, reduce operating cost.
2. the present invention carries out denitrogenation dephosphorizing processing to sewage using iron autotrophic denitrification, carbon source is added without outside.
The present invention carries out at hydro-thermal the active carbon of adsorption saturation using the organic matter in activated carbon adsorption sanitary sewage
Reason, makes the activation of the organic carbon for being adsorbed in active carbon and charcoal, hydro-thermal charcoal can continue on for the adsorption treatment of sanitary sewage.Benefit
With total nitrogen, the total phosphorus in iron autotrophic denitrification/nitration processes removal sewage, carbon source is added without outside.The present invention is reducing life
Organic matter is recycled to and realized the carbonization of organic matter and is recycled while wastewater pollutants living, in sanitary sewage disposal field
There is biggish application prospect.
Detailed description of the invention
Fig. 1 is sanitary sewage organic matter provided by the invention recycling coupling iron autotrophic denitrification/nitrification denitrogenation and dephosphorization
The flow chart of method.
Specific embodiment
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
Embodiment 1
A kind of method that the recycling of sanitary sewage organic matter couples iron autotrophic denitrification/nitrification denitrogenation and dephosphorization, process is such as
Shown in Fig. 1:
(1) 3~5g coconut husk charcoal investment is filled in the adsorption tank of 1L sanitary sewage, is stirred under the revolving speed of 120r/min
3h, COD removal rate are up to 60% or more.
(2) active carbon after absorption is added in water heating kettle with water, filling rate 50%, hydrothermal temperature is 220 DEG C, water
The hot time is 4h.Obtained hydro-thermal charcoal is put into adsorption tank, under the same conditions, COD removal rate is up to 60% or more.
(3) anoxic pond is added in the sanitary sewage after being processed by activated carbon adsorption, adds colored be used as of enough iron planes and fills out
Material, hydraulic detention time 4h.
(4) sewage that anoxic pond is discharged is passed through aerobic tank, hydraulic detention time 1.5h.The removal rate of total nitrogen is reachable
70% or more, the removal rate of total phosphorus is up to 80% or more.
(5) sewage that aerobic tank is discharged is passed through sewage and sludge separation in secondary settling tank.
Embodiment 2
A kind of method that the recycling of sanitary sewage organic matter couples iron autotrophic denitrification/nitrification denitrogenation and dephosphorization, process is such as
Shown in Fig. 1:
(1) 6~8g coconut husk charcoal investment is filled in the adsorption tank of 1L sanitary sewage, is stirred under the revolving speed of 120r/min
4h, COD removal rate are up to 80% or more.
(2) active carbon after absorption is added in water heating kettle with water, filling rate 50%, hydrothermal temperature is 220 DEG C, water
The hot time is 4h.Obtained hydro-thermal charcoal is put into adsorption tank, under the same conditions, COD removal rate is up to 80% or more.
(3) anoxic pond is added in the sanitary sewage after being processed by activated carbon adsorption, adds colored be used as of enough iron planes and fills out
Material, hydraulic detention time 3h.
(4) sewage that anoxic pond is discharged is passed through aerobic tank, hydraulic detention time 1.5h.The removal rate of total nitrogen is reachable
65% or more, the removal rate of total phosphorus is up to 80% or more.
(5) sewage that aerobic tank is discharged is passed through sewage and sludge separation in secondary settling tank.
Claims (7)
1. a kind of method of sanitary sewage organic matter recycling coupling iron autotrophic denitrification/nitrification denitrogenation and dephosphorization, which is characterized in that
The following steps are included:
Step 1): sanitary sewage and activated carbon raw material are added in adsorption tank, and stirring makes active carbon sufficiently adsorb sanitary sewage
In organic matter；
Step 2): adding iron compound in anoxic pond, and the sanitary sewage after activated carbon adsorption is passed through anoxic pond and sufficiently stops,
Remove nitrate nitrogen, nitrite nitrogen and the phosphorus in sewage；Active carbon after absorption is added to water heating kettle, carries out hydro-thermal process, water
The organic carbon and charcoal of activated carbon adsorption in thermal process activate, and realize the regeneration of active carbon, obtain hydro-thermal charcoal；
Step 3): anoxic pond water outlet is passed through aerobic tank and sufficiently stops, nitrifier by the ammoniacal nitrogen in sewage be converted into nitrate nitrogen with
Nitrite nitrogen；
Step 4): aerobic tank water part is back to anoxic pond, removes nitrate nitrogen and nitrous state by iron autotrophic denitrification process
Nitrogen, remaining enters secondary settling tank and is precipitated；
Step 5): the water in secondary settling tank is discharged respectively with sludge, be finally reached in sanitary sewage organic matter recycling and denitrogenation and
The effect of dephosphorization.
2. the side of sanitary sewage organic matter recycling coupling iron autotrophic denitrification/nitrification denitrogenation as described in claim 1 and dephosphorization
Method, which is characterized in that the activated carbon raw material in the step 1) is any one or a few in coal, coconut husk and biomass.
3. the side of sanitary sewage organic matter recycling coupling iron autotrophic denitrification/nitrification denitrogenation as described in claim 1 and dephosphorization
Method, which is characterized in that dosage of the activated carbon raw material in sanitary sewage is 2.0~8.0g/L in the step 1)；Stirring
Revolving speed is 150~250r/min, and mixing time is 2~8h.
4. the side of sanitary sewage organic matter recycling coupling iron autotrophic denitrification/nitrification denitrogenation as described in claim 1 and dephosphorization
Method, which is characterized in that iron compound is iron plane flower, iron filings, reduced iron powder, ferrous salt, pyrite and red iron in the step 2)
Any one or a few in mine.
5. the side of sanitary sewage organic matter recycling coupling iron autotrophic denitrification/nitrification denitrogenation as described in claim 1 and dephosphorization
Method, which is characterized in that the temperature of hydro-thermal process is 160~260 DEG C in the step 2), and the time is 2~6h, and active carbon is in hydro-thermal
Filling rate in kettle is the 50%~80% of water heating kettle inner product.
6. the side of sanitary sewage organic matter recycling coupling iron autotrophic denitrification/nitrification denitrogenation as described in claim 1 and dephosphorization
Method, which is characterized in that reused in the hydro-thermal charcoal investment adsorption tank that the step 2) obtains.
7. the side of sanitary sewage organic matter recycling coupling iron autotrophic denitrification/nitrification denitrogenation as described in claim 1 and dephosphorization
Method, which is characterized in that the condition of iron autotrophic denitrification is pH value 7~8, hydraulic retention 3~8 in the anoxic pond in the step 2)
Hour.
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Cited By (3)
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| CN112794568A (en) * | 2020-12-28 | 2021-05-14 | 东华大学 | Sludge-based hydrothermal carbon-reinforced secondary biochemical effluent deep denitrification method and reactor |
| CN112811593A (en) * | 2021-01-15 | 2021-05-18 | 青岛思普润水处理股份有限公司 | Iron-based autotrophic nitrogen and phosphorus removal system based on MBBR and operation method |
| CN112978925A (en) * | 2021-04-26 | 2021-06-18 | 东华大学 | Sulfur-iron synergistic polyculture denitrification enhanced low C/N sewage denitrification method and reactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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