CN102701514B - Method for improving treatment efficiency of sewage plant by utilizing bypass sludge activity enhancing technology - Google Patents
Method for improving treatment efficiency of sewage plant by utilizing bypass sludge activity enhancing technology Download PDFInfo
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- CN102701514B CN102701514B CN2012100743630A CN201210074363A CN102701514B CN 102701514 B CN102701514 B CN 102701514B CN 2012100743630 A CN2012100743630 A CN 2012100743630A CN 201210074363 A CN201210074363 A CN 201210074363A CN 102701514 B CN102701514 B CN 102701514B
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a method for improving treatment efficiency of a sewage plant by utilizing a bypass sludge activity enhancing technology. The method comprises the following steps of: enabling sewage after primary pretreatment to pass through a main biological tank for secondary treatment and then flow into a secondary sedimentation tank, performing sludge-water separation in the secondary sedimentation tank, discharging supernatant fluid of the secondary sedimentation tank or enabling the supernatant fluid to be subjected to follow-up advanced treatment, conveying activated sludge concentrated by the secondary sedimentation tank to a bypass biological tank through a sludge reflux pump and a pipeline, and enabling the activated sludge to reflux to the water inlet end of the main biological tank after aerobic, anoxic and anaerobic biochemical process treatment in the bypass biological tank. According to the method disclosed by the invention, the total amount of the activated sludge in the sewage plant can be greatly improved by simply transforming (combined building) the existing biological tank or only newly building a small-volume bypass biological tank (separate building), and the total retention quantity of MLSS (mixed liquor suspended solids) of the biological system disclosed by the invention can be improved by 18%-100% in comparison with the process in the prior art. The method disclosed by the invention is suitable for not only new building of sewage plants, but also upgrade and standard-raising transformation of the existing sewage plants; and the method disclosed by the invention has the advantages of high efficiency, low consumption and low investment.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, particularly relate to a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency.
Background technology
At present, the water environment in China problem becomes increasingly conspicuous, energy-saving and emission-reduction pressure increases day by day, except the Large scale construction Sewage treatment systems, the sewage work that has built up or runed also faces the effluent quality requirement of increasingly stringent, carries the theme that the mark transformation will become interior Sewage Plant construction of one quite long from now on period and transformation.That but the main bugbear that current Chinese Sewage Plant faces is mainly water-inlet carbon source is not enough, poor denitrification and dephosphorization effect and the problem such as Sewage Plant dilatation place is limited.Simultaneously, raising due to effluent quality standard, especially nitrogen, phosphorus index, usually existing biological tank pond holds to meet carries mark to the mud requirement in age, often need enlarging or newly-built biological tank, to increase existing biological tank pond, hold, need larger occupation of land but enlarging biological tank pond holds, investment is also higher simultaneously.When existing planning place can not meet pond appearance amplification needs, prior art generally considers to adopt the static bed biomembrane methods such as carrier activated sludge process or employing BAF, these two kinds of technology can meet good effluent quality requirement, especially can realize good nitrification.But biomembrance process investment and running cost are high, and the series of problems existed in operation control, the application of above-mentioned technology restricted.
In addition, for moving the Sewage Plant that adopts traditional technology, in order to meet, can guarantee the minimum mud of effluent quality (SRT in age
min) requirement, biological tank often need to be in the lower operation of the high reactivity sludge concentration (MLSS) required higher than normal operation, and then the second pond solid loading is too high, such MLSS solid (MLSS between biological tank-second pond transfers) mode of transferring be difficult to tackle peak come the water yield or rainy season flood peak, the higher water yield of coming can increase the solid loading of second pond in short-term greatly, have a large amount of mud and washed out system, cause significantly the promoting and a large amount of losses of MLSS of SS (suspended substance) of effluent quality.
The water-inlet carbon source deficiency is the common problem that a lot of regional Sewage Plant of China face, carbon source is not enough can directly affect the Sewage Plant Nitrogen/Phosphorus Removal, this is because above-mentioned two kinds of bioprocesss all need in sewage that sufficient solvability readily biodegradable organism (SCOD), especially low-molecular-weight voltaile fatty acid (VFAs) are arranged.But a lot of areas of China are because the scarcity of water-inlet carbon source makes Sewage Plant be difficult to stably realize the qualified discharge of nitrogen phosphorus.Usually in order to meet the requirement of water outlet phosphorus, the terms of settlement in engineering design and operation is to adopt chemical dephosphorization; And, for the requirement of water outlet TN (total nitrogen), the general employing supplemented additional organic carbon source, as methyl alcohol, sodium acetate, acetic acid etc., above-mentioned additional carbon mode can improve the running cost of Sewage Plant undoubtedly greatly, has also increased sludge yield, is difficult to continue application in the most of areas of China simultaneously.
In fact, Sewage Plant produces primary sludge and active sludge itself have just been contained huge " internal carbon source ".The internal carbon source produced in order to take full advantage of Sewage Plant, the sludge hydrolytic technology becomes ideal chose, and active sludge is stable due to total amount and organism absorption need to be explained within whole SRT (mud age) cycle, and active sludge hydrolysate energy 100% is utilized by biological process, therefore, how to consider online hydrolysis efficient utilization of active sludge, for improving processing efficiency, reducing the dependence to outside business carbon source, seem most important.
Prior art has: " regeneration activity mud " technique or " adsorption-regeneration " technique, but in these two kinds of form regenerated reactors, be continuous aeration, fully good oxygen condition, have some shortcomings like this, the one, due to fully good oxygen condition, therefore do not possess the anaerobic environment that realizes denitrification denitrogenation; The 2nd, fully good oxygen condition, the organism adsorbed in mud can not carry out anoxic or anaerobic hydrolysis, and potential " internal carbon source " of active sludge is not utilized effectively, and can't in mixed solution, discharge SCOD, VFAs; The 3rd, owing to adopting continuous aeration, energy consumption is higher.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency is provided.
Technical scheme of the present invention is summarized as follows:
A kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, it is characterized in that comprising the steps: flowing into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the second pond supernatant liquor discharges or enters follow-up advanced treatment, and the concentrated active sludge of second pond is delivered to main biological tank feed-water end by one of two kinds of modes;
Mode one: described concentrated active sludge arrives the bypass biological tank by sludge reflux pump and Pipeline transport, at the bypass biological tank, through aerobic, anoxic, anaerobic biological process, after processing, is back to main biological tank feed-water end;
Mode two: described concentrated active sludge is divided into two portions after by sludge reflux pump and pipeline, a part is transported to the bypass biological tank, be back to main biological tank feed-water end through aerobic, anoxic, anaerobic biological process after processing at the bypass biological tank, second section is delivered directly to main biological tank feed-water end.
Bypass biological tank pond holds that to account for the ratio that total biological tank holds be 3%～30%, and preferably 10%～20%, it is that main biological tank pond holds with bypass biological tank pond and holds sum that total biological tank holds.
Active sludge concentrated in mode one is 2～18h in the residence time of bypass biological tank; Active sludge concentrated in described mode two is 3～36h, preferably 12～30h in the residence time of bypass biological tank.
The bypass biological tank is provided with aerator, and the bypass biological tank is provided with agitator or impeller.
The activated sludge concentration of main biological tank is 2.5～5.0g/L; The activated sludge concentration of bypass biological tank is 5.0～20.0g/L.
Be provided with DO, ORP, NH in the bypass biological tank
3-N, NO
3-N, PO
4at least one sensor of-P, TP, the signal that sensor detects is uploaded to automatic control system.
In mode one, return sludge ratio is 30%～100%.
In mode two, the return sludge ratio R of first part
1return sludge ratio R with second section
2relation meets: R
1+ R
2=(0.30～1.00).
Return sludge ratio in the present invention refers to the ratio of sludge reflux amount and Sewage Plant flooding quantity (being external reflux).
The invention has the beneficial effects as follows:
The present invention can be by simply transforming (building jointly) to existing biological tank, the perhaps bypass biological tank of a newly-built little volume (minute build) only, just can significantly improve the Sewage Plant total amount of activated sludge, biosystem MLSS of the present invention possesses the comparable prior art processes of total amount and improves 18%～100%;
The present invention can significantly improve the processing load (organic loading and hydraulic load) of Sewage Plant;
The present invention can tackle peak or the flooding quantity that exceeds the quata rainy season to the impact of biosystem and second pond, being unlikely to second pond, because solid loading is too high, mud to occur excessive, causes the active sludge loss or affect water outlet SS;
The present invention can strengthen the removal to pollutent, and especially nitrification and denitrification, improved the removal ability to TN; The active sludge hydrolysis can occur in the bypass biological tank produce SCOD, VFAs, can supplement the deficiency of water-inlet carbon source like this, and then realize enhanced biological phosphorus removal functional, the clearance of raising to TP, and can reduce or cancel adding of business carbon source, therefore for low C/N than the intensified denitrification and dephosphorization of municipal wastewater, the present invention significantly is better than prior art;
The present invention can reduce the output of excess sludge, and mud stability is improved simultaneously;
It is newly-built that the present invention not only is applicable to Sewage Plant, and the mark transformation is proposed in the upgrading that also is applicable to existing Sewage Plant, and the present invention is efficient, low consumption, investment are cheap.
The accompanying drawing explanation
Fig. 1 is the first embodiment schema of the present invention.
Fig. 2 is the second embodiment schema of the present invention.
Fig. 3 is the third embodiment schema of the present invention.
In figure: 1 is main biological tank; 2 is second pond; 3 is the bypass biological tank; 4 is sludge reflux pump; 5 is sludge treatment technique unit (sludge dewatering equipment or sludge digestion, dewatering system)
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: that (sewage is in main biological tank after by main biological tank 1 second-stage treatment through the pretreated sewage of one-level, by aerobic, anoxic or anaerobic process, realization is to the removal of pollutent and the reduction of concentration) inflow second pond 2, carry out mud-water separation in second pond, the discharge of second pond supernatant liquor, the concentrated active sludge of second pond arrives bypass biological tank (the lower SART pond of being called for short) 3 by sludge reflux pump 4 and Pipeline transport, in the SART pond through aerobic, anoxic, the anaerobic biological process is back to main biological tank feed-water end after processing, the unnecessary excess sludge produced is processed by sludge treatment technique unit 5.
Each processing unit or structures main design parameters are as follows:
It is 3% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 2h in the residence time in SART pond.
Be provided with DO, NH in the SART pond
3-N, TP sensor, the signal that described sensor detects is uploaded to automatic control system.
The activated sludge concentration of main biological tank is 3.5g/L; The activated sludge concentration in SART pond is 10.5g/L.
Return sludge ratio is 50%.
As shown in Figure 1, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps and flow process: through the pretreated sewage of one-level, flow into second pond after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the second pond supernatant liquor enters follow-up advanced treatment, the concentrated active sludge of second pond by sludge reflux pump and Pipeline transport to the SART pond, in the SART pond through aerobic, anoxic, the anaerobic biological process is back to main biological tank feed-water end after processing, the unnecessary excess sludge produced is processed by the sludge treatment technique unit.Each processing unit or structures main design parameters are as follows:
It is 15% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 12h in the residence time in SART pond
Be provided with DO, ORP, NH in the SART pond
3-N sensor, the signal that described sensor detects is uploaded to automatic control system.
The activated sludge concentration of main biological tank is 5.0g/L; The activated sludge concentration in SART pond is 20.0g/L.
Return sludge ratio is 33%.
As shown in Figure 1, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: to flow into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the discharge of second pond supernatant liquor, the concentrated active sludge of second pond by sludge reflux pump and Pipeline transport to the SART pond, be back to main biological tank feed-water end through aerobic, anoxic, anaerobic biological process after processing in the SART pond, the unnecessary excess sludge of generation is processed by the sludge treatment technique unit.Each processing unit or structures main design parameters are as follows:
It is 10% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 3h in the residence time in SART pond
Be provided with DO, ORP, NH in the SART pond
3-N, PO
4-P sensor, the signal that described sensor detects is uploaded to automatic control system.
The activated sludge concentration of main biological tank is 2.5g/L; The activated sludge concentration in SART pond is 5.0g/L.
Return sludge ratio is 100%.
As shown in Figure 1, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: to flow into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the second pond supernatant liquor enters follow-up advanced treatment, the concentrated active sludge of second pond by sludge reflux pump and Pipeline transport to the SART pond, in the SART pond through aerobic, anoxic, the anaerobic biological process is back to main biological tank feed-water end after processing, the unnecessary excess sludge produced is processed by the sludge treatment technique unit.Each processing unit or structures main design parameters are as follows:
It is 20% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 12h in the residence time in SART pond.
Be provided with DO, NH in the SART pond
3-N, PO
4-P, NO
3-N sensor, the signal that described sensor detects is uploaded to automatic control system.
The activated sludge concentration of main biological tank is 3.5g/L; The activated sludge concentration in SART pond is 12.3g/L.
Return sludge ratio is 40%.
As shown in Figure 1, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: to flow into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the second pond supernatant liquor enters follow-up advanced treatment, the concentrated active sludge of second pond by sludge reflux pump and Pipeline transport to the SART pond, in the SART pond through aerobic, anoxic, the anaerobic biological process is back to main biological tank feed-water end after processing, the unnecessary excess sludge produced is processed by the sludge treatment technique unit.Each processing unit or structures main design parameters are as follows:
It is 30% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 18h in the residence time in SART pond.
Be provided with DO, NH in the SART pond
3-N, NO
3-N sensor, the signal that described sensor detects is uploaded to automatic control system.
The activated sludge concentration of main biological tank is 3.5g/L; The activated sludge concentration in SART pond is 15.2g/L.
Return sludge ratio is 30%.
Embodiment 6
As shown in Figure 2, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: to flow into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the discharge of second pond supernatant liquor, the concentrated active sludge of second pond is divided into two portions after by sludge reflux pump and pipeline, a part is transported to the SART pond, be back to main biological tank feed-water end after aerobic, anoxic, anaerobic biological treating processes in the SART pond, second section is delivered directly to main biological tank feed-water end.
Each processing unit or structures main design parameters are as follows:
It is 3% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 3h in the residence time in SART pond.
The activated sludge concentration of main biological tank is 5.0g/L; The activated sludge concentration in SART pond is 20.0g/L.
The return sludge ratio R of first part
1be 25%; The return sludge ratio R of second section
2be 5%, simultaneously, R1+R2=0.30.
Be provided with DO, NH in the SART pond
3-N, TP sensor, the signal that described sensor detects is uploaded to automatic control system.
Embodiment 7
As shown in Figure 2, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: to flow into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the discharge of second pond supernatant liquor, the concentrated active sludge of second pond is divided into two portions after by sludge reflux pump and pipeline, a part is transported to the SART pond, be back to main biological tank feed-water end through aerobic, anoxic, anaerobic biological process after processing in the SART pond, second section is delivered directly to main biological tank feed-water end.Each processing unit or structures main design parameters are as follows:
It is 10% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 20h in the residence time in SART pond.
The activated sludge concentration of main biological tank is 2.5g/L; The activated sludge concentration in SART pond is 5.0g/L.
The return sludge ratio R of first part
1be 90%; The return sludge ratio R of second section
2be 10%, simultaneously, R
1+ R
2=1.00.
Be provided with DO, NH in the SART pond
3-N, PO
4-P sensor, the signal that described sensor detects is uploaded to automatic control system.
Embodiment 8
As shown in Figure 3, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: to flow into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the second pond supernatant liquor enters follow-up advanced treatment, the concentrated active sludge of second pond is divided into two portions after by sludge reflux pump and pipeline, a part is transported to the SART pond, in the SART pond through aerobic, anoxic, the anaerobic biological process is back to main biological tank feed-water end after processing, second section is delivered directly to main biological tank feed-water end.Each processing unit or structures main design parameters are as follows:
It is 30% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 36h in the residence time in SART pond.
The activated sludge concentration of main biological tank is 3.5g/L; The activated sludge concentration in SART pond is 10.5g/L.
The return sludge ratio R of first part
1be 35%; The return sludge ratio R of second section
2be 15%, simultaneously, R1+R2=0.5.
Be provided with DO, ORP, NH in the SART pond
3-N, NO
3-N, TP sensor, the signal that described sensor detects is uploaded to automatic control system.
Embodiment 9
As shown in Figure 2, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: to flow into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the second pond supernatant liquor enters follow-up advanced treatment, the concentrated active sludge of second pond is divided into two portions after by sludge reflux pump and pipeline, a part is transported to the SART pond, in the SART pond through aerobic, anoxic, the anaerobic biological process is back to main biological tank feed-water end after processing, second section is delivered directly to main biological tank feed-water end.Each processing unit or structures main design parameters are as follows:
It is 20% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 30h in the residence time in SART pond.
The activated sludge concentration of main biological tank is 2.5g/L; The activated sludge concentration in SART pond is 7.5g/L.
The return sludge ratio R of first part
1be 45%; The return sludge ratio R of second section
2be 5%, simultaneously, R
1+ R
2=0.5.
Be provided with DO, NH in the SART pond
3-N, NO
3-N, PO
4-P sensor, the signal that described sensor detects is uploaded to automatic control system.
As shown in Figure 3, a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, comprise the steps: to flow into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the second pond supernatant liquor enters follow-up advanced treatment, the concentrated active sludge of second pond is divided into two portions after by sludge reflux pump and pipeline, a part is transported to the SART pond, in the SART pond through aerobic, anoxic, the anaerobic biological process is back to main biological tank feed-water end after processing, second section is delivered directly to main biological tank feed-water end.
It is 16% that SART Chi Chi holds the ratio that accounts for total biological tank appearance.
Concentrated active sludge is 12h in the residence time in SART pond.
The activated sludge concentration of main biological tank is 5.0g/L; The activated sludge concentration in SART pond is 10.0g/L.
SART is provided with PO in pond
4-P/TP sensor, the signal that sensor detects is uploaded to automatic control system.
The return sludge ratio R of first part
1be 50%; The return sludge ratio R of second section
2be 25%, simultaneously, R
1+ R
2=0.75.
Be provided with DO, NH in the SART pond
3-N, PO
4-P, ORP sensor, the signal that described sensor detects is uploaded to automatic control system.
Embodiment 11
Certain sewage work, due to the raising of water inlet pollution concentration, need to extend transformation, but Sewage Plant is not extended place, has therefore adopted method of the present invention to be transformed.Concrete grammar is: keep protista pond appearance and floor space constant, to have the biological tank front portion now and mark 20% volume as the SART pond, SART pond and main biological tank are combined, and mud adopts the total reflux mode, be that returned sluge all is back in the bypass pond, by online DO, ORP, NO
3-N, NH
3aeration, stirring (creating aerobic, anaerobic environment) are controlled in the combination of-N detection signal, and change protista pond water entry, the bypass pond does not intake, the active sludge that the second pond that only refluxes refluxes and comes, main biological tank MLSS concentration is 3.1g/L, returned sluge MLSS concentration is 8.0g/L, after transformation, result is as follows: without newly-built or enlarging biological tank, after adopting method of the present invention, biosystem mud total amount is compared and originally can have been improved 40%, this means in the situation that the Sewage Plant amount of inlet water is constant, Sewage Plant is processed organic loading and has been improved 40%, simultaneously, because returned sluge has carried out endogenous denitrification, so total water outlet TN of Sewage Plant, the TP index has obtained larger raising.
Embodiment 12
Certain sewage work, engineering construction divides first phase, second phase, the designing treatment water yield 100,000 m
3, water outlet one-level A standard.First phase biological tank pond holds for 25400m
3, the second phase is designed to A, two series of B, but the second phase only built at present A series, pond holds for 24200m
3, therefore, the present situation pond holds and amounts to 49600m
3, pond holds the processing water yield 7.5 ten thousand m of corresponding one-level A standard at present
3if, according to former common process, still need so and build the second stage of B series, need to extend again 24200m
3pond hold, could meet 100,000 m
3the one-level A standard of/d.Adopt the present invention, will have in preliminary sedimentation tank one now and transform the SART pond as, pond holds 5000m
3, wherein main biological tank MLSS is designed to 4.og/m
3, SART pond MLSS is 13.0g/m
3the active sludge refluxed all is back to the SART pond, that returned sluge completes successively in the SART pond is aerobic, after anoxic, anaerobic biological process, be back to respectively again one, the second stage of main biological tank, simultaneously, return sludge ratio is reduced to 45% by original 100%, and after above-mentioned transformation, the processing power of Sewage Plant can be brought up to 100,000 m
3, the cancellation of the second stage of B series is not built.Reduce investment, and also improved water outlet TN, TP stability.
In above-described embodiment 1～10, the SART pond is provided with aerator, and embodiment 1,3,7 also is provided with agitator, and embodiment 2,4,5,6,8,9 and 10 is provided with impeller.In the various embodiments described above, in the SART pond, " start/stop " of aeration or stirring (or propelling) equipment is according to online DO, ORP, NH in pond
3-N, PO
4one or more combination in-P/TP detection signal is optimized control, can also carry out periodic Control according to sequential, by sequential control, realizes " aeration/stop exposing to the sun " process.And then realize the rotation of aerobic in the bypass pond/anoxic or anaerobic process or alternately, realize respectively the purpose of nitrated, denitrification or anaerobic hydrolysis.
It is that main biological tank pond holds with SART Chi Chi and holds sum that described total biological tank holds, and the SART pond can divide with main biological tank that build also can be with together with main biological tank be built jointly.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art; be familiar with those skilled in the art and obviously can carry out some local modification to these case study on implementation with comparalive ease; and General Principle described herein is applied in other case study on implementation; therefore; the invention is not restricted to the above-mentioned embodiment enumerated; one of skill in the art is according to the ultimate principle of announcement of the present invention, and the improvement of carrying out on basis of the present invention or modification all should belong within protection scope of the present invention.
Claims (7)
1. a method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency, it is characterized in that comprising the steps: flowing into second pond through the pretreated sewage of one-level after by main biological tank second-stage treatment, carry out mud-water separation in second pond, the second pond supernatant liquor discharges or enters the subsequent technique advanced treatment, and the concentrated active sludge of second pond is delivered to main biological tank feed-water end by one of two kinds of modes;
Mode one: described concentrated active sludge arrives the bypass biological tank by sludge reflux pump and Pipeline transport, at the bypass biological tank, is back to main biological tank feed-water end through aerobic, anoxic, anaerobic biological process after processing successively;
Mode two: described concentrated active sludge is divided into two portions after by sludge reflux pump and pipeline, a part is transported to the bypass biological tank, be back to main biological tank feed-water end through aerobic, anoxic, anaerobic biological process after processing successively at the bypass biological tank, second section is delivered directly to main biological tank feed-water end;
It is 3%～30% that described bypass biological tank pond holds the ratio that accounts for total biological tank appearance, and it is that main biological tank pond holds and bypass biological tank pond holds sum that described total biological tank holds;
Concentrated active sludge is 3～36h in the residence time of bypass biological tank;
The activated sludge concentration of described main biological tank is 2.5～5.0g/L; The activated sludge concentration of described bypass biological tank is 5.0～20.0g/L.
2. a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency according to claim 1, is characterized in that it is 10%～20% that described bypass biological tank pond holds the ratio that accounts for total biological tank appearance.
3. a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency according to claim 1, is characterized in that active sludge concentrated in described mode two is 12～30h in the residence time of bypass biological tank.
4. a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency according to claim 1, is characterized in that described bypass biological tank is provided with aerator, and described bypass biological tank is provided with agitator or impeller.
5. a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency according to claim 1, is characterized in that being provided with DO, ORP, NH in described bypass biological tank
3?N, NO
3?N, PO
4?at least one sensor of P, TP, the signal that described sensor detects is uploaded to automatic control system.
6. a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency according to claim 1, is characterized in that in mode one, return sludge ratio is 30%～100%.
7. a kind of method of utilizing bypass sludge activity intensifying technology to improve the Sewage Plant treatment efficiency according to claim 1, it is characterized in that in mode two, the return sludge ratio R2 relation of the return sludge ratio R1 of first part and second section meets: R1+R2=(0.30～1.00).
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| CN104118971B (en) * | 2014-08-12 | 2016-04-13 | 刘智晓 | A kind of method utilizing Sewage Plant mixing sludge hydrolysed ferment intensified denitrification and dephosphorization |
| CN105366811A (en) * | 2015-12-09 | 2016-03-02 | 浦华环保股份有限公司 | Sewage treatment plant sludge treatment system, and treatment method thereof |
| CN109851049B (en) * | 2019-04-11 | 2024-06-18 | 信开环境投资有限公司 | Sewage treatment unit and use method and application thereof |
| CN110182942A (en) * | 2019-05-30 | 2019-08-30 | 中国市政工程中南设计研究总院有限公司 | A kind of high-efficiency activated sludge treatment technique |
| CN112939207B (en) * | 2021-01-29 | 2022-06-03 | 联合环境技术(天津)有限公司 | Method for accurately adjusting sludge concentration of aerobic tank of sewage plant |
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