CN105366811A - Sewage treatment plant sludge treatment system, and treatment method thereof - Google Patents
Sewage treatment plant sludge treatment system, and treatment method thereof Download PDFInfo
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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
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such 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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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Abstract
The invention belongs to the technical field of sewage treatment, and especially relates to a sewage treatment plant sludge treatment system, and a treatment method thereof. According to the treatment method, sewage from a grit basin is subjected to nitrogen and phosphorus removal in an AAO reaction rank so as to obtain a mixed liquid; the mixed liquid is treated in a secondary sedimentation tank so as to obtain sludge and waste water; the obtained waste water is discharged, and is subjected to subsequent treatment, the sludge is delivered into a sludge storage tank for distribution, most sludge is delivered back into the AAO reaction tank, and the left sludge is delivered into a hydrolysis acidification pool for treatment, wherein hydrolysis acidification on only a part of the sludge is capable of reducing carbon source invested cost, reducing hydrolysis cost, and shortening sludge hydrolysis period; at last sludge-water diversion is carried out, wherein a liquid supernatant containing VFA organic matters is delivered into the AAO reaction tank so as to supply carbon sources for nitrogen and phosphorus removal, and avoid influences on original dominant bacterial communities in the AAO reaction tank, and the sludge obtained via hydrolysis is delivered into a sludge treatment unit for treatment.
Description
Technical field
The present invention relates to technical field of sewage, particularly relate to a kind of Sludge treatment system of sewage treatment plant and treatment process thereof, be specifically related to a kind ofly can improve denitrogenation dephosphorizing efficiency, reduce carbon source input cost and reach the Sludge treatment system of sewage treatment plant and treatment process thereof that reduce sewage work mud amount.
Background technology
At present, national urban wastewater treatment firm water quality standard constantly promotes, and denitrogenation dephosphorizing is the difficulties of current sewage disposal, for ensureing the effect of denitrogenation dephosphorizing, needs supplementary carbon source in sewage.The nineties in last century, China starts Large scale construction sewage work, and the standard performed at that time is " municipal sewage plant's pollutant emission standard " GB18918/1996 standard, performs secondary standard according to sewage work's major part of this standard working-out.2000, there occurs a large amount of blue algae bloom event in China, strong threat is caused to the health of tap water, through expert systematic study and repeatedly prove, national environmental protection department is proposed new effluent-disposal standard " municipal sewage plant's pollutant emission standard " GB18918/2002 standard.This standard specifies: urban wastewater treatment firm water outlet enters country and economizes the major river valley and lake determined, reservoirs etc. are closed, during semiclosed waters, perform the A standard of primary standard, enter GB3838 surface water III class function waters (the Potable Water Conservation district of delimitation and Swimming area except), during GB3097 seawater two class function waters, perform the B standard of primary standard, compared with one-level B standard, except CODcr (chemical oxygen demand (COD) measured with potassium dichromate process) and BOD5 (BiologyOxygenDemand5, i.e. five-day BOD, that the dissolved oxygen content that a kind of microbial metabolism effect consumes carrys out secondary indication water body by an important indicator of Organic pollutants degree) standard more strict outside, one-level A standard adds the requirement to total nitrogen, also more strict to the requirement of total phosphorus content and bacterial regrowth.
Biological denitrification process is conventional treatment process, but makes the nitric efficiency of sewage lower because of carbon source deficiency, is difficult to reach the one-level A standard that GB18918-2002 specifies.Because denitrifying bacteria carries out denitrification denitrogenation in the process of decomposing organic matter, under the condition additionally not adding carbon source, must have in sewage that enough organism (carbon source) guarantees are denitrifying to carry out smoothly, it is generally acknowledged, BOD5/TN>3.5 ~ 5, TN refers to total nitrogen index, namely think that sewage has enough carbon sources for denitrifying bacteria, and during BOD5/TN<3.5 ~ 5, then need to supplement methyl alcohol carbon source or organic acid (acetic acid) in sewage.Be less than the requirement of 15mg/L according to sewage disposal plant effluent TN value, methyl alcohol dosage should be generally nitrate nitrogen at more than 3.5mg/mgNO3-N, NO3-N; As adopted sodium acetate as carbon source, dosage generally should at more than 6mg/mgNO3-N.
For this reason, correlative link guarantor research and development department has also dropped into great effort and has studied, and develops some internal carbon source development technique, mainly contains following several technique:
One, utilize the technical finesse route of second pond mud, be divided into all-hydrolytic technique and flow measurement hydrolysis process, Fig. 1 is the Technology Roadmap of all-hydrolytic technique, namely the sewage after desanding is through AAO (Anaerobic-Anoxic-Oxic, be anaerobic-anoxic-oxic method) reaction tank 1 process after enter second pond 5, after second pond 5, all enter sludge hydrolytic pond 3 be hydrolyzed, sludge hydrolytic pond 3 is for improving Biodegradability of Wastewater, mud after hydrolysis is back to AAO reaction tank 1 by sludge reflux pump 4, and by AAO biological treatment for follow-up anaerobic phosphorus release provides carbon source, Fig. 2 is the Technology Roadmap of effluent hydrolysis process, be different from all-hydrolytic technique, sewage through second pond 5 is divided into two lines to shunt by sludge reflux pump 4, enter sludge hydrolytic pond 3 to a part of mud to be hydrolyzed, enter AAO reaction tank 1 again, all the other mud then can directly be back to AAO reaction tank 1, and can provide carbon source for follow-up anaerobic phosphorus release by AAO biological treatment.
Two, by the technical finesse route of Sludge from primary sedimentation tank, Fig. 3 is the Technology Roadmap of active preliminary sedimentation tank technique, this operational path is simple, sewage is mainly utilized to enter the hydrolysed ferment of base sludge layer in preliminary sedimentation tank 2, and carbon source can be provided for follow-up anaerobic phosphorus release by AAO biological treatment, the productive rate of sludge hydrolytic product like this is lower, the sludge blanket thickness of this technique and mud are difficult to accurate control simultaneously, and be also add the solid loading of preliminary sedimentation tank 2 by the direct backflow of sludge reflux pump 4, and then effluent quality can be affected; Fig. 4 is the Technology Roadmap of complete mixed fermentation technology, this complete mixed fermentation technology devises separately a complete hybrid-type sludge fermentation hydrolytic tank on sludge reflux line, the hydrolysate of primary sludge enters preliminary sedimentation tank 2 and enters sludge hydrolytic pond 3 again together with sewage, such mud constantly circulates hydrolysis, can provide carbon source by AAO biological treatment for follow-up anaerobic phosphorus release; Fig. 5 is the Technology Roadmap of static fermentation technique, sewage after desanding enters concentrated hydrolytic tank 9 respectively by preliminary sedimentation tank 2 and sludge reflux pump 4, carbon source can be provided for follow-up anaerobic phosphorus release by AAO biological treatment, fermented liquid can directly be entered follow-up anaerobic pond by this technique, and fermented liquid utilization ratio is high but fermentation time is more wayward by Water Temperature; Fig. 6 is the Technology Roadmap of two-part zymotechnique, sewage after desanding enters concentration basin 10 respectively by preliminary sedimentation tank 2 and sludge hydrolytic pond 3, sewage after concentration basin 10 processes enters sludge hydrolytic pond 3 by sludge reflux pump 4 and carries out circular treatment, and carbon source can be provided for follow-up anaerobic phosphorus release by AAO biological treatment, this process means needs to build independent fermentation vat and concentration basin, thus increases dynamics of investment.
Above-mentioned carbon source development technique is all hydrolyzed based on by the mud of preliminary sedimentation tank or second pond, thus obtains the necessary small molecules nutritive substance VFA (volatilefattyacid, i.e. voltaile fatty acid) of sewage denitrification and dephosphorization.According to preliminary sedimentation tank 2, a large amount of organism is attached on throw out and removes from sewage, thus when carbon source is badly in need of in sewage work, adverse influence is had, in addition, even if isolated for preliminary sedimentation tank 2 mud is re-started hydrolysis to denitrogenation dephosphorizing, because the required residence time long (general mud mud age be 2-12 days), also not easily control accurately in the acidication stage, sometimes have methane and produce, thus cause the loss of carbon source; According to second pond 5, due to all or part of hydrolysis of returned sluge, adopt the mode that all refluxes of mud mixture, change the kind of dominant microflora in AAO biochemistry pool 1, though be conducive to dephosphorization but be unfavorable for the growth of nitrifier, therefore have impact to nitrated; In addition, the amount of returned sluge is very large, and all hydrolysis investment is high.The return sludge ratio of municipal sewage plant is generally the 50%-100% of the water yield, if be all hydrolyzed, the residence time of minimum 24 hours need be adopted, and the residence time only 15-18 hour of general municipal sewage plant, need to increase overall investment and be about 40%-80%, very uneconomical.Even if employing lateral flow is according to 30% wherein, the ratio that investment increases, also at about 12%-28%, therefore increases investment considerable, is only minimizing and adds the amount of carbon source and increase so many investment, uneconomic beyond doubt.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention solves existing internal carbon source development technique to adopt mud mixture all or the mode of larger proportion acidication, change the kind of dominant microflora in AAO biochemistry pool and the amount of returned sluge is large, cause the problem that cost of investment is high, long processing period is also unfavorable for the growth of nitrifier of all hydrolysis.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of sludge of sewage treatment plant treatment process, this treatment process comprises the steps:
S1, carry out denitrification dephosphorization technique process from the sewage of settling pit at AAO reaction tank and obtain mixed solution;
S2, by second pond, mixed solution is obtained to step S1 and carry out process and obtain mud and sewage;
S3, the sewage obtained is entered decontaminated water advanced treatment unit carry out subsequent disposal in step S2; The mud obtained in step S2 is shunted, wherein, major part mud directly sends AAO reaction tank back to, another part mud is delivered to hydrolysis acidification pool and to be hydrolyzed acidification, obtain containing the organic supernatant liquor of VFA and body refuse, supernatant liquor is sent back in AAO reaction tank as denitrification dephosphorization technique provides carbon source.
Wherein, in step s3, the mud sending into hydrolysis acidification pool is 1:70 ~ 1:20 with the volume ratio of the mud of directly sending AAO reaction tank back to.
Wherein, in step s3, the body refuse after acidication process enters sludge treating block and carries out subsequent disposal.
Present invention also offers a kind of Sludge treatment system of sewage treatment plant, this Sludge treatment system of sewage treatment plant comprises AAO reaction tank, second pond, dividing cell and hydrolysis acidification pool, described AAO reaction tank is connected with described second pond, described second pond is connected with described dividing cell by shore pipe, and described dividing cell is connected with described AAO reaction tank with described hydrolysis acidification pool respectively and is used for the mud in second pond is carried out shunting processing.
Wherein, described dividing cell comprises return sludge pump and residual sludge pump, and described return sludge pump is connected with described AAO reaction tank, and described residual sludge pump is connected with described hydrolysis acidification pool.
Wherein, described hydrolysis acidification pool corresponds to described AAO reaction tank and be provided with supernatant liquor delivery pipe.
Wherein, this Sludge treatment system of sewage treatment plant also comprises the air blast machine room be connected with described AAO reaction tank.
Present invention also offers a kind of Sludge treatment system of sewage treatment plant, this Sludge treatment system of sewage treatment plant comprises AAO reaction tank, second pond, T-valve and hydrolysis acidification pool that technical process connects successively, the import of described T-valve is connected with described second pond, first outlet of described T-valve is connected with described AAO reaction tank, second outlet of described T-valve is connected with described hydrolysis acidification pool, and described hydrolysis acidification pool is connected with described AAO reaction tank.
Wherein, described hydrolysis acidification pool corresponds to described AAO reaction tank and be provided with supernatant liquor delivery pipe.
Wherein, this Sludge treatment system of sewage treatment plant also comprises the air blast machine room be connected with described AAO reaction tank.
(3) beneficial effect
Technique scheme tool of the present invention has the following advantages: the invention provides a kind of sludge of sewage treatment plant treatment process, and first the sewage from settling pit is carried out denitrification dephosphorization technique process at AAO reaction tank and obtain mixed solution by this treatment process, secondly carrying out process by second pond to mixed solution obtains mud and sewage, finally the sewage of acquisition is entered decontaminated water advanced treatment unit and carry out subsequent disposal, the mud of acquisition is shunted, only excess sludge part is hydrolyzed acidifying, supernatant liquor after acidication contains a large amount of VFA to be sent into AAO biochemical treatment system for denitrification dephosphorization technique and provides carbon source, mud after acidication process then enters sludge treating block, the mode of employing muddy water shunting like this, avoid and dominant microflora original in AAO reaction tank is had an impact, the present invention to be only hydrolyzed acidifying to partial sludge, both carbon source input cost and sludge treatment expense had been decreased, again reduce hydrolysis investment and sludge hydrolytic cycle, also achieve the decrement of excess sludge simultaneously, thus reduce the processing cost of excess sludge.
Accompanying drawing explanation
Fig. 1 is the all-hydrolytic processing technology routine figure utilizing second pond mud;
Fig. 2 is the flow measurement hydrolysis process Technology Roadmap utilizing second pond mud;
Fig. 3 is the active preliminary sedimentation tank processing technology routine figure utilizing Sludge from primary sedimentation tank;
Fig. 4 is the Technology Roadmap of the complete mixed fermentation technology utilizing Sludge from primary sedimentation tank;
Fig. 5 is the Technology Roadmap of the static fermentation technique utilizing Sludge from primary sedimentation tank;
Fig. 6 is the Technology Roadmap of the two-part zymotechnique utilizing Sludge from primary sedimentation tank;
Fig. 7 is the Technology Roadmap of Sludge treatment system of sewage treatment plant in the embodiment of the present invention;
Fig. 8 is the schema of sludge of sewage treatment plant treatment process in the embodiment of the present invention.
In figure: 1:AAO reaction tank; 2: preliminary sedimentation tank; 3: sludge hydrolytic pond; 4: sludge reflux pump; 5: second pond; 6: dividing cell; 7: hydrolysis acidification pool; 8: air blast machine room; 9: concentrated hydrolytic tank; 10: concentration basin.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
As shown in Figure 7, embodiments provide a kind of Sludge treatment system of sewage treatment plant, this Sludge treatment system of sewage treatment plant comprises AAO reaction tank 1, second pond 5, dividing cell 6 and hydrolysis acidification pool 7, AAO reaction tank 1 is connected with second pond 5, anaerobic pond, anoxic pond and Aerobic Pond is provided with in AAO reaction tank 1, these three ponds all have the effect of denitrogenation dephosphorizing, release phosphorus unlike what also there occurs polyP bacteria in anaerobic pond, the denitrification that anoxic pond there occurs denitrifying bacterium changes into nitrogen nitric nitrogen, polyP bacteria may be inhaled phosphorus and also may release phosphorus or exist simultaneously, mainly there is nitration reaction in Aerobic Pond, mineralized nitrogen is become nitric nitrogen, the excessive suction phosphorus of polyP bacteria, and by air blast machine room 8 for Aerobic Pond provides oxygen, second pond 5 is important component parts of Sludge System, its effect mainly makes mud be separated, make clarification of water and carry out sludge condensation, second pond 5 is connected with dividing cell 6 by shore pipe, dividing cell 6 is connected with AAO reaction tank 1 with hydrolysis acidification pool 7 respectively and is used for the mud in second pond 5 is carried out shunting processing, namely a part of mud is directly delivered to AAO reaction tank 1, hydrolysis acidification pool 7 is connected with AAO reaction tank 1, remaining mud is then delivered to hydrolysis acidification pool 7 and is hydrolyzed acidification, acquisition is delivered to AAO reaction tank 1 with the organic supernatant liquor of VFA, for sewage disposal provides carbon source, the present invention only obtains VFA for sewage denitrification and dephosphorization provide carbon source to the partial sludge acidifying that is hydrolyzed, both carbon source input cost and sludge treatment expense had been decreased, again reduce hydrolysis investment and sludge hydrolytic cycle.
Particularly, dividing cell 6 comprises return sludge pump and residual sludge pump, and return sludge pump is connected with AAO reaction tank 1, and residual sludge pump is connected with hydrolysis acidification pool 7.In the present embodiment, mud in second pond 5 is delivered in dividing cell 6 by shore pipe, a part of mud (returned sluge) is directly delivered in AAO reaction tank 1 by return sludge pump by dividing cell 6, and be delivered in hydrolysis acidification pool 7 by remaining mud (excess sludge) acidification that is hydrolyzed, the VFA organism obtained is entered in AAO reaction tank 1 with supernatant liquor, wherein supernatant liquor sends into corresponding anaerobism or oxygen-starved area according to the needs of denitrogenation and dephosphorization process, the mode shunted by muddy water is hydrolyzed, avoid and dominant microflora original in AAO reaction tank is had an impact, for denitrogenation dephosphorizing provides carbon source, and the excess sludge after fermentation, its main component is the organism that inorganics and part are difficult to degrade, then send into the process operation of going sludge treating block to carry out being correlated with.
Particularly, hydrolysis acidification pool 7 corresponds to AAO reaction tank 1 and be provided with supernatant liquor delivery pipe.In the present embodiment, supernatant liquor delivery pipe is for the VFA organism carrying supernatant liquor and obtained by the acidifying that is hydrolyzed to excess sludge.
Further, this Sludge treatment system of sewage treatment plant also comprises the air blast machine room 8 be connected with AAO reaction tank 1, and air blast machine room 8 is for providing oxygen for the Aerobic Pond in AAO reaction tank 1.
The embodiment of the present invention additionally provides a kind of Sludge treatment system of sewage treatment plant, this Sludge treatment system of sewage treatment plant comprises AAO reaction tank 1, second pond 5, T-valve and hydrolysis acidification pool 7 that technical process connects successively, T-valve is the valve body with an import and two outlets, the import of T-valve is connected with second pond 5, first outlet of T-valve is connected with AAO reaction tank 1, second outlet of T-valve is connected with hydrolysis acidification pool 7, and hydrolysis acidification pool 7 is connected with AAO reaction tank 1.In the present embodiment, T-valve is consistent with the effect that return sludge pump and residual sludge pump play, and is delivered to respectively in AAO reaction tank 1 and hydrolysis acidification pool 7, then carries out follow-up operation by returned sluge and excess sludge.
Particularly, hydrolysis acidification pool 7 corresponds to AAO reaction tank 1 and be provided with supernatant liquor delivery pipe.In the present embodiment, supernatant liquor delivery pipe is for the VFA organism carrying supernatant liquor and obtained by the acidifying that is hydrolyzed to excess sludge.
Further, this Sludge treatment system of sewage treatment plant also comprises the air blast machine room 8 be connected with AAO reaction tank 1, and air blast machine room 8 is for providing oxygen for the Aerobic Pond in AAO reaction tank 1.
The embodiment of the present invention additionally provides a kind of sludge of sewage treatment plant treatment process, for convenience of description, illustrate for the device in above-mentioned Sludge treatment system of sewage treatment plant, but the device be not limited in above-mentioned Sludge treatment system of sewage treatment plant, the treatment scheme of this sludge of sewage treatment plant treatment process as shown in Figure 8, specifically comprises the steps:
S1, enter AAO reaction tank 1 from the sewage of settling pit by water inlet pipe, and carry out denitrification dephosphorization technique process by anaerobic pond, anoxic pond and the Aerobic Pond be arranged in AAO reaction tank 1 and obtain mixed solution;
S2, the mixed solution obtained by the second pond 5 couples of step S1 are clarified, concentrated and reflow treatment, obtain mud and sewage respectively;
S3, the sewage obtained entered decontaminated water advanced treatment unit carry out subsequent disposal in step S2, object be remove further fail to remove completely in initial processing steps organic pollutant, concentration of suspension, colourity, smell taste and mineralizer etc.; The mud obtained in step S2 is shunted, wherein, major part mud directly sends AAO reaction tank 1 (being called returned sluge) back to, another part mud is delivered to hydrolysis acidification pool 7 and to be hydrolyzed acidification (being called excess sludge), obtain containing the organic supernatant liquor of VFA and body refuse, supernatant liquor is entered AAO reaction tank 1 by supernatant liquor delivery pipe, for denitrification dephosphorization technique provides carbon source.
Particularly, in step s3, device mud being carried out triage operator is T-valve or the dividing cell 6 being provided with return sludge pump and residual sludge pump, excess sludge in dividing cell 6 and returned sluge are delivered to hydrolysis acidification pool 7 and AAO reaction tank 1 respectively by return sludge pump and residual sludge pump or T-valve, in the present embodiment, T-valve is identical with the technique effect that sludge reflux pump and residual sludge pump play, and is all in order to returned sluge and excess sludge are delivered to AAO reaction tank 1 and hydrolysis acidification pool 7 respectively.
Particularly, calculate according to 0.1-0.2gVFA/gVSS, according to the mode that excess sludge utilizes, the high-quality carbon source of 7mg/L-14mg/L can be provided for municipal effluent, thus the carbon source dosage that can reduce is 25-51 ton/ten thousand ton sewage/years.
Under normal circumstances, the excess sludge production of municipal sewage plant is 1 ton of over dry mud/ten thousand ton sewage, amount to about 200 tons, the mud of water ratio 99.5%, mud as mud calculated according to 24 hours age, only need about 2% (routine needs to increase 12%-80% investment) increasing investment, be used for building excess sludge and develop pond, utilization and the decrement of excess sludge can be realized.
Further, in step s3, the mud sending into hydrolysis acidification pool is 1:70 ~ 1:20 with the volume ratio of the mud of directly sending AAO reaction tank back to, in the present embodiment, be that 1:25 is illustrated for the mud (excess sludge) sending into acidizing hydrolyzation tank and the volume ratio of the mud (returned sluge) of directly sending AAO reaction tank back to, adopt 24 hour residence time, only increase by 2% investment, can be the high-quality carbon source that this sewage work provides 14mg/L, thus 51 tons/ten thousand tons sewage/years of carbon source dosage can be reduced.
Further, in step s3, the body refuse after hydrolysis acidification pool 7 acidication is discharged by removing sludge treating block, and the main component of the excess sludge after fermentation is the organism that inorganics and part are difficult to degrade.Thus, the most of organism in excess sludge all transforms in order to high quality carbon source, and is delivered to AAO reaction tank together along with supernatant liquor, and the sludge quantity of discharge can reduce about 30%.
In sum, the invention provides a kind of sludge of sewage treatment plant treatment process, first the sewage from settling pit is carried out denitrification dephosphorization technique process at AAO reaction tank and obtains mixed solution by this treatment process, secondly carrying out process by second pond to mixed solution obtains mud and sewage, finally the sewage of acquisition is entered decontaminated water advanced treatment unit and carry out subsequent disposal, the mud of acquisition is shunted, only excess sludge part is hydrolyzed acidifying, supernatant liquor after acidication contains a large amount of VFA to be sent into AAO biochemical treatment system for denitrification dephosphorization technique and provides carbon source, mud after acidication process then enters sludge treating block, the mode of employing muddy water shunting like this, avoid and dominant microflora original in AAO reaction tank is had an impact, the present invention to be only hydrolyzed acidifying to partial sludge, both carbon source input cost and sludge treatment expense had been decreased, again reduce hydrolysis investment and sludge hydrolytic cycle, also achieve the decrement of excess sludge simultaneously, thus reduce the processing cost of excess sludge.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a sludge of sewage treatment plant treatment process, is characterized in that, comprises the steps:
S1, carry out denitrification dephosphorization technique process from the sewage of settling pit at AAO reaction tank and obtain mixed solution;
S2, by second pond, mixed solution is obtained to step S1 and carry out process and obtain mud and sewage;
S3, the sewage obtained is entered decontaminated water advanced treatment unit carry out subsequent disposal in step S2; The mud obtained in step S2 is shunted, wherein, major part mud directly sends AAO reaction tank back to, another part mud is delivered to hydrolysis acidification pool and to be hydrolyzed acidification, obtain containing the organic supernatant liquor of VFA and body refuse, supernatant liquor is sent back in AAO reaction tank as denitrification dephosphorization technique provides carbon source.
2. sludge of sewage treatment plant treatment process according to claim 1, is characterized in that: in step s3, and the mud sending into hydrolysis acidification pool is 1:70 ~ 1:20 with the volume ratio of the mud of directly sending AAO reaction tank back to.
3. sludge of sewage treatment plant treatment process according to claim 1, is characterized in that: in step s3, and the body refuse after acidication process enters sludge treating block and carries out subsequent disposal.
4. a Sludge treatment system of sewage treatment plant, it is characterized in that: comprise AAO reaction tank (1), second pond (5), dividing cell (6) and hydrolysis acidification pool (7), described AAO reaction tank (1) is connected with described second pond (5), described second pond (5) is connected with described dividing cell (6) by shore pipe, and described dividing cell (6) is connected with described AAO reaction tank (1) with described hydrolysis acidification pool (7) respectively and is used for the mud in second pond (5) is carried out shunting processing.
5. Sludge treatment system of sewage treatment plant according to claim 4, it is characterized in that: described dividing cell (6) comprises return sludge pump and residual sludge pump, described return sludge pump is connected with described AAO reaction tank (1), and described residual sludge pump is connected with described hydrolysis acidification pool (7).
6. Sludge treatment system of sewage treatment plant according to claim 4, is characterized in that: described hydrolysis acidification pool (7) is upper is provided with supernatant liquor delivery pipe corresponding to described AAO reaction tank (1).
7. the Sludge treatment system of sewage treatment plant according to claim 4 or 6, is characterized in that: also comprise the air blast machine room (8) be connected with described AAO reaction tank (1).
8. a Sludge treatment system of sewage treatment plant, it is characterized in that: comprise AAO reaction tank (1), second pond (5), T-valve and hydrolysis acidification pool (7) that technical process connects successively, the import of described T-valve is connected with described second pond (5), first outlet of described T-valve is connected with described AAO reaction tank (1), second outlet of described T-valve is connected with described hydrolysis acidification pool (7), and described hydrolysis acidification pool (7) is connected with described AAO reaction tank (1).
9. Sludge treatment system of sewage treatment plant according to claim 8, is characterized in that: described hydrolysis acidification pool (7) is upper is provided with supernatant liquor delivery pipe corresponding to described AAO reaction tank (1).
10. Sludge treatment system of sewage treatment plant according to claim 8 or claim 9, is characterized in that: also comprise the air blast machine room (8) be connected with described AAO reaction tank (1).
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| CN110282841A (en) * | 2019-08-06 | 2019-09-27 | 深圳市深水水务咨询有限公司 | A kind of municipal sludge front end decrement and middle-end volume reduction system |
| CN110627293A (en) * | 2018-06-25 | 2019-12-31 | 光大水务科技发展（南京）有限公司 | Sewage treatment method |
| CN111138041A (en) * | 2020-01-22 | 2020-05-12 | 大连安能杰科技有限公司 | Sewage treatment system for carbon source circulating sludge reduction and sewage treatment method using system |
| CN115304230A (en) * | 2022-07-22 | 2022-11-08 | 重庆大学 | Three-in-one method for sludge reduction, VFAs production and phosphorus recovery |
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