CN107140781A - Suitable for the advanced purification process of secondary effluent of municipal sewage plant - Google Patents
Suitable for the advanced purification process of secondary effluent of municipal sewage plant Download PDFInfo
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- CN107140781A CN107140781A CN201710217534.3A CN201710217534A CN107140781A CN 107140781 A CN107140781 A CN 107140781A CN 201710217534 A CN201710217534 A CN 201710217534A CN 107140781 A CN107140781 A CN 107140781A
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- Prior art keywords
- bioreactor
- secondary effluent
- purification process
- algae solution
- municipal sewage
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Classifications
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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
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
-
- 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
-
- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Life Sciences & Earth Sciences (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)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
The invention discloses a kind of advanced purification process suitable for secondary effluent of municipal sewage plant, the problems such as existing secondary effluent purification process technique is complicated, cost is high is solved.Technical scheme comprises the following steps：A. biological respinse and algae solution separation, wherein biological respinse, which includes sending into the sewage of secondary effluent in bioreactor, carries out optical-biological reaction, helotisn body is inoculated with the water of the bioreactor, the helotisn body is made up of chlorella and activated sludge bacteria；Including reacted reaction solution in bioreactor is sent into algae solution separation chamber, first the method progress pre-separation through gravitational settling obtains upper strata supernatant and lower floor's algae solution for the algae solution separation, lower floor's algae solution is centrifugally separating to obtain centrifuged supernatant and centrifugation frond again, and the upper strata supernatant and centrifuged supernatant are discharged naturally.Present invention process is simple, hydraulic detention time is short, good sewage processing effect, it is environmentally friendly, also have additional economic benefit.
Description
Technical field
The present invention relates to sewage treatment area, specifically a kind of depth suitable for secondary effluent of municipal sewage plant
Spend purification technique.
Background technology
Existing sewage disposal technology mainly has microbial method and membrane technology method.Wherein, traditional microbiological method system utilizes
The growth of microorganism reduces carbon source, the purpose of purifying water body to consume the nutriment in sewage to reach.But microorganism gives birth to
Carbon-nitrogen ratio has to meet certain requirement when long, so, when in sewage carbon source by microbial consumption totally after, microbes from
So it is stopped, the continued propagation of microorganism can not be being ensured when carbon source is reduced, wastewater treatment efficiency is influenceed.And now sewage
In remaining nitrogen class material be at least 20mg/L, far above GB3838-2002《Water environment quality standard》In on V classes
The limit of total nitrogen in the environmental quality standards elementary item standard of (being primarily adapted for use in agricultural water area and general landscape requirement waters)
Value 2mg/L.Traditional microbiological method wants to solve this problem, it is necessary to by advanced equipment and high operating cost.
And the nutriment in secondary effluent can be totally separated out by the different membrane aperture of membrane technology method choice, reach water quality
Natural water standard, it might even be possible to reach drinking water standard.But membrane technology equipment one-time investment is too high, it is impossible to extensive,
The application of continuation.
For existing sewage disposal, no output is only put into, it is impossible to produce economic benefit, cause cost high
High, wherein not only operating cost is high for traditional life technology of waste water control, and the nitrogen and phosphorus content in discharge water after processing is still up to
20mg/L, it is impossible to reach GB3838-2002《Water environment quality standard》Minimum requirements V classes (are primarily adapted for use in agricultural water
Area and general landscape require waters) environmental quality standards elementary item standard in total nitrogen limit value.
The content of the invention
The invention aims to solve above-mentioned technical requirements there is provided a kind of technique is simple, it is good sewage processing effect, right
The advanced purification process suitable for secondary effluent of municipal sewage plant environment-friendly, that also there is additional economic benefit.
Comprise the following steps：
A. biological respinse:Optical-biological reaction, the photoproduction will be carried out in the sewage feeding bioreactor of secondary effluent
Helotisn body is inoculated with the water of thing reactor, hydraulic detention time is 0.5-1h, the average daily water sample that substitutes accounts for liquid bulk in pond
Long-pending 50~60%, the helotisn body presses 9-11 by chlorella and activated sludge bacteria：1(V:V) constitute；
B, algae solution separation:Reacted reaction solution in bioreactor is sent to algae solution separation chamber first through gravitational settling
Method carries out pre-separation and obtains upper strata supernatant and lower floor's algae solution, lower floor's algae solution be centrifugally separating to obtain again centrifuged supernatant and
Frond is centrifuged, the upper strata supernatant and centrifuged supernatant are discharged naturally.
Also include the extraction of c. greases：Centrifugation frond vacuum freeze drying is obtained into algae powder, grease then is carried out to algae powder
Extraction obtains grease.
In the step a, control the temperature of bioreactor at 10 DEG C~35 DEG C, pH is controlled in 7~8, aeration quantity control
System is the 15~25 of sewage volume.
In the step a, the inoculum concentration of the helotisn body is 20~25% of sewage volume in pond.
In the step a, the volume ratio of chlorella and activated sludge bacteria is 10 in the helotisn body:1.
The depth of water of the biological reaction pool is no more than 3 meters, and the depth of water of the bioreactor is no more than 3 meters, institute
It is reaction tank, reaction runner or reaction runway to state bioreactor.Reaction solution in the bioreactor is through wriggling
It is pumped to algae solution separation chamber.
For problem present in background technology, inventor has used helotisn body in bioreactor, described
Helotisn body is constituted using chlorella and activated sludge bacteria, is cooperateed with using the physiological function of algae and the class of bacterium two between biological
Act on purifying sewage.Chlorella utilizes the nutriments such as the CO2 and NH4+, PO4-3 in water by photosynthesis, and synthesis is certainly
Body cellular material simultaneously discharges O2；Activated sludge bacteria is then decomposed to organic pollution using O2 in water, converted, and produces CO2
With above-mentioned nutriment, so as to maintain the growth and breeding of algae, so move in circles, finally consume the nitrogen phosphorus in B-grade sewage
Deng nutrients while, realize the biological purification of sewage, additionally it is possible to prevent the loss of microalgae as lasting algae kind supply,
It is easy to the harvest of microalgae after processing.The proportioning of chlorella and activated sludge bacteria is preferably 9-11 in the helotisn body：1,
More preferably 10：1(V:V), under the proportioning chlorella and activated sludge bacteria Curve of growth fitting degree highest, it is and anti-with sewage
At once the proportioning can greatly be kept, it is ensured that the balance of helotisn body.If proportioning is too high, the battalion of activated sludge bacteria can be caused
Surplus is supported, activated sludge bacteria enters decline phase, destruction helotisn body balance too early；If proportioning is too low, active dirt can be caused
The expansion of mud bacterium, covers the necessary illumination of chlorella growth, reduces the lipid accumulation of chlorella.
The temperature control of the bioreactor is at 10 DEG C~35 DEG C, and temperature is too high to cause the activity drop of chlorella
Low, temperature is too low to cause chlorella can not participate in reacting into rest period；Aeration control the 10~20% of sewage volume,
Aeration quantity is too high, and a large amount of fronds can be taken away while liquid evaporation, destroys the balance of helotisn body, and aeration quantity is too small, can lead
Cause reaction uneven, the fat content reduction of output chlorella.PH is controlled 7~8, it is to avoid water body peracid crosses alkali destruction
The balance of phycomycete body.It can be converted solar energy into electrical energy as needed with supporting solar energy conversion system as lamp tube power supply, with
Meet sunshine-duration supply.
By effective control to reaction condition, helotisn body is only to need with the sewage reaction time in bioreactor
0.5-1h (hydraulic detention time), you can reach that average daily replacement water sample accounts for 50~60% purpose of reaction liquid volume in pond,
It is most short better than the reaction time in the application of known helotisn body also to need 4h record.
Relative to prior art, the invention has the advantages that：1st, it can ensure that microorganism is held under conditions of carbon source is lacked
Continuous growth, the water quality after processing can be directly discharged into ecological water body (wherein TN ＜ 2mg/L, CODcr ＜ 40mg/L), fit very much
Close the sewage of processing this low-carbon-source content of sewage plant secondary effluent.2nd, the phycomycete proportioning and control condition under output algae,
Fat content creates huge economic benefit more than 35wt% in sewage disposal process.3rd, handling process of the present invention can be realized
Consecutive production, hydraulic detention time is short, environmentally friendly, and the depth for being particularly suitable for use in secondary effluent of municipal sewage plant is net
Change.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
Process example：
A. biological respinse:Optical-biological reaction will be carried out in the sewage feeding bioreactor of secondary effluent, photo-biological is anti-
Device specification is answered for 600cm × 25cm × 100cm (length × width × height), design head, which is no more than in 3m, the present embodiment, in pond is
60cm, reaction solution volume 900L；Control the temperature of bioreactor at 10 DEG C~30 DEG C, pH is controlled in 7~8, aeration quantity control
System is the 20% of sewage volume；It is inoculated with helotisn body in the water of the bioreactor, the helotisn body connects
It is 20% of sewage volume in pond to plant amount, and primary vaccination is to need static reaction 4~6 days, after surveying its OD (540) more than 1, just may be used
Open successive reaction pattern.Hydraulic detention time is 0.5h, average daily to substitute water sample accounts for receiving liquid volume pond in 55%, described
Helotisn body is made up of chlorella and activated sludge bacteria, the volume ratio of chlorella and activated sludge bacteria in the helotisn body
For 10:1；Stop aeration when night is without sunshine.Due to no light and aeration, chlorella is stopped action in reaction tank, temporary transient dormancy,
Entirely make reactor in a dormant state.When second day is again started up aerator, you can the activity of quick activation chlorella.Even
Reforwarding row 20 days.
B, algae solution separation:Reacted reaction solution in bioreactor is pumped into algae solution separation chamber through wriggling first through weight
The method of power sedimentation carries out pre-separation and obtains upper strata supernatant and lower floor's algae solution, and lower floor's algae solution is centrifugally separating to obtain centrifugation again
Supernatant and centrifugation frond, the upper strata supernatant and centrifuged supernatant are discharged naturally.
C. grease is extracted：Centrifugation frond vacuum freeze drying is obtained into algae powder, grease extraction is then carried out to algae powder obtains
Byproduct grease.The method that grease extraction is carried out to algae powder is prior art, is not described in detail here.
By taking certain secondary effluent from sewage treatment plant as an example, sewage index is：Average daily influent quality index TN：13.9mg/L,
TP：0.47mg/L, CODcr：46.50mg/L, ammonia nitrogen：4.62mg/L.
After above-mentioned PROCESS FOR TREATMENT, the upper strata supernatant and centrifuged supernatant of discharge are effluent quality index TN naturally：
1.77mg/L, TP：0.22mg/L, CODcr：36.35mg/L, ammonia nitrogen：1.15mg/L.Effluent quality index is below GB3838-
2002《Water environment quality standard》In ring on V classes (being primarily adapted for use in agricultural water area and general landscape requirement waters)
Border quality standard elementary item standard limited value：TN： 2mg/L、TP：0.4mg/L、CODcr：40mg/L, ammonia nitrogen：2mg/L.Can be with
It is directly discharged in natural water without polluting.
After above-mentioned PROCESS FOR TREATMENT, the algae of harvest surveys its lipid content, averagely containing 36.8wt%, with the biological bavin of preparation
The economic benefit of oil.
Embodiment 2
In addition to following data change, other processing steps and condition be the same as Example 1：
Control the temperature of bioreactor at 10 DEG C~20 DEG C, pH is controlled 7~8, and aeration control is in sewage volume
15%；The inoculum concentration of the helotisn body is chlorella and work in 25% of sewage volume in pond, the helotisn body
Property sludge bacteria volume ratio be 9:1, hydraulic detention time is 1h, average daily to substitute water sample accounts for receiving liquid volume in pond 50%.
After above-mentioned PROCESS FOR TREATMENT, the upper strata supernatant and centrifuged supernatant of discharge are effluent quality index TN naturally：
1.98mg/L, TP：0.26mg/L, CODcr：37.22mg/L, ammonia nitrogen：1.20mg/L.Effluent quality index is below GB3838-
2002《Water environment quality standard》In ring on V classes (being primarily adapted for use in agricultural water area and general landscape requirement waters)
Border quality standard elementary item standard limited value：TN： 2mg/L、TP：0.4mg/L、CODcr：40mg/L, ammonia nitrogen：2mg/L.Can be with
It is directly discharged in natural water without polluting.
After above-mentioned PROCESS FOR TREATMENT, the algae of harvest surveys its lipid content, averagely containing 35.7wt%, with the biological bavin of preparation
The economic benefit of oil.
Embodiment 3
In addition to following data change, other processing steps and condition be the same as Example 1：
Control the temperature of bioreactor at 20 DEG C~30 DEG C, pH is controlled 7~8, and aeration control is in sewage volume
15%；The inoculum concentration of the helotisn body is chlorella and work in 22% of sewage volume in pond, the helotisn body
Property sludge bacteria volume ratio be 11:1, hydraulic detention time is 0.5h, and the average daily water sample that substitutes accounts for receiving liquid volume in pond
60%.
After above-mentioned PROCESS FOR TREATMENT, the upper strata supernatant and centrifuged supernatant of discharge are that effluent quality index is naturally：TN：
1.89mg/L, TP：0.30mg/L, CODcr：36.72mg/L, ammonia nitrogen：1.87mg/L.Effluent quality index is below GB3838-
2002《Water environment quality standard》In ring on V classes (being primarily adapted for use in agricultural water area and general landscape requirement waters)
Border quality standard elementary item standard limited value： TN：2mg/L、TP：0.4mg/L、CODcr：40mg/L, ammonia nitrogen：2mg/L.Can be with
It is directly discharged in natural water without polluting.
After above-mentioned PROCESS FOR TREATMENT, the algae of harvest surveys its lipid content, averagely containing 35.1wt%, with the biological bavin of preparation
The economic benefit of oil.
Claims (7)
1. a kind of advanced purification process suitable for secondary effluent of municipal sewage plant, it is characterised in that
Comprise the following steps：
A. biological respinse:Optical-biological reaction will be carried out in the sewage feeding bioreactor of secondary effluent, the photo-biological is anti-
Helotisn body is inoculated with the water for answering device, hydraulic detention time is 0.5-1h, the average daily water sample that substitutes accounts for liquid volume in pond
50~60%, the helotisn body presses 9-11 by chlorella and activated sludge bacteria:1(V:V) constitute；
B, algae solution separation:Reacted reaction solution in bioreactor is sent to the algae solution separation chamber first method through gravitational settling
Carry out pre-separation and obtain upper strata supernatant and lower floor's algae solution, lower floor's algae solution is centrifugally separating to obtain centrifuged supernatant and centrifugation again
Frond, the upper strata supernatant and centrifuged supernatant are discharged naturally.
2. it is applied to the advanced purification process of secondary effluent of municipal sewage plant as claimed in claim 1, it is characterised in that
Also include the extraction of c. greases：Centrifugation frond vacuum freeze drying is obtained into algae powder, grease extraction is then carried out to algae powder obtains
Grease.
3. being applied to the advanced purification process of secondary effluent of municipal sewage plant as claimed in claim 1 or 2, its feature exists
In in the step a, the temperature of control bioreactor is at 10 DEG C~35 DEG C, and pH is controlled 7~8, and aeration control is in dirt
The 15~25 of water volume.
4. it is applied to the advanced purification process of secondary effluent of municipal sewage plant as claimed in claim 1, it is characterised in that
In the step a, the inoculum concentration of the helotisn body is 20~25% of sewage volume in pond.
5. the advanced purification process suitable for secondary effluent of municipal sewage plant as described in claim any one of 1-4, its
It is characterised by, in the step a, the volume ratio of chlorella and activated sludge bacteria is 10 in the helotisn body:1.
6. the advanced purification process suitable for secondary effluent of municipal sewage plant as described in claim 1 or 3, its feature exists
In the depth of water of the bioreactor is no more than 3 meters, and the bioreactor is reaction tank, reaction runner or anti-
Answer runway.
7. the advanced purification process suitable for secondary effluent of municipal sewage plant as described in claim 1 or 3, its feature exists
In the reaction solution in the bioreactor is pumped to algae solution separation chamber through wriggling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710217534.3A CN107140781A (en) | 2017-04-05 | 2017-04-05 | Suitable for the advanced purification process of secondary effluent of municipal sewage plant |
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| CN201710217534.3A CN107140781A (en) | 2017-04-05 | 2017-04-05 | Suitable for the advanced purification process of secondary effluent of municipal sewage plant |
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| CN107140781A true CN107140781A (en) | 2017-09-08 |
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| CN201710217534.3A Pending CN107140781A (en) | 2017-04-05 | 2017-04-05 | Suitable for the advanced purification process of secondary effluent of municipal sewage plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133540A (en) * | 2018-10-29 | 2019-01-04 | 温州大学 | A kind of sewage treatment unit and the method using device processing sewage |
| CN112225322A (en) * | 2020-10-29 | 2021-01-15 | 南京卓蓝生物有限公司 | Method for treating domestic sewage by using algae-bacteria symbiotic system |
| CN113292164A (en) * | 2021-04-30 | 2021-08-24 | 哈尔滨工业大学 | Preparation method and application of phycomycete symbiont for degrading culture wastewater containing high-concentration antibiotics and having low C/N ratio |
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| JP2009214035A (en) * | 2008-03-11 | 2009-09-24 | Japan Biomass Corp | Treatment method of water-base paint booth circulating water |
| CN102586116A (en) * | 2011-01-14 | 2012-07-18 | 江南大学 | Common chlorella as well as culturing method and application thereof |
| CN105961303A (en) * | 2016-06-03 | 2016-09-28 | 山东大学 | Fish-bacterium-algae-symbiotic ecological breeding system and running method thereof |
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2017
- 2017-04-05 CN CN201710217534.3A patent/CN107140781A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009214035A (en) * | 2008-03-11 | 2009-09-24 | Japan Biomass Corp | Treatment method of water-base paint booth circulating water |
| CN102586116A (en) * | 2011-01-14 | 2012-07-18 | 江南大学 | Common chlorella as well as culturing method and application thereof |
| CN105961303A (en) * | 2016-06-03 | 2016-09-28 | 山东大学 | Fish-bacterium-algae-symbiotic ecological breeding system and running method thereof |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133540A (en) * | 2018-10-29 | 2019-01-04 | 温州大学 | A kind of sewage treatment unit and the method using device processing sewage |
| CN112225322A (en) * | 2020-10-29 | 2021-01-15 | 南京卓蓝生物有限公司 | Method for treating domestic sewage by using algae-bacteria symbiotic system |
| CN113292164A (en) * | 2021-04-30 | 2021-08-24 | 哈尔滨工业大学 | Preparation method and application of phycomycete symbiont for degrading culture wastewater containing high-concentration antibiotics and having low C/N ratio |
| CN113292164B (en) * | 2021-04-30 | 2022-05-17 | 哈尔滨工业大学 | Preparation method and application of phycomycete symbiont for degrading culture wastewater containing high-concentration antibiotics and having low C/N ratio |
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