CN201777958U - Treatment system for phosphorus removal by three-mud process nitrification and denitrification - Google Patents
Treatment system for phosphorus removal by three-mud process nitrification and denitrification Download PDFInfo
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- CN201777958U CN201777958U CN2010201946408U CN201020194640U CN201777958U CN 201777958 U CN201777958 U CN 201777958U CN 2010201946408 U CN2010201946408 U CN 2010201946408U CN 201020194640 U CN201020194640 U CN 201020194640U CN 201777958 U CN201777958 U CN 201777958U
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Abstract
The utility model relates to a treatment system for phosphorus removal by three-mud process nitrification and denitrification. The system comprises a pretreatment unit, an anaerobic unit, a middle precipitation unit, a primary aeration biological nitrification unit, an anoxic unit, a secondary precipitation unit and a secondary aeration biological nitrification unit. The treatment system of the utility model has small occupied space and low capital construction and operating cost. In terms of low-carbon and nitrogen urban sewage, the effluent of the system can stably meet the primary standards A of Urban Sewage Disposal Plant Contamination Integrated Discharge Standard.
Description
[technical field]
Technical solutions of the utility model belong to the town sewage process field of middle low ratio of carbon to ammonium (COD/TN is between 3～10), are specifically related to the nitrated and denitrification dephosphorization treatment system of a kind of three mud methods.
[background technology]
According to the regulation of " urban wastewater treatment firm pollutant emission standard GB18918-2002 " one-level A, town sewage after treatment, the sewage of discharging must meet TN≤15mg/L, NH
4 +-N≤5mg/L, TP≤0.5mg/L.Therefore, how the organic while in removing sewage, reduce the NH in the sewage effluent
4 +The content of-N, TN, TP becomes sewage disposal and faces one of urgent task of technology.Nitrogen, phosphorus become the biggest problem of newly-built Sewage Plant and old factory upgrading.China's southern area municipal effluent generally has the low ratio of carbon to ammonium feature, and promptly the ratio of COD/TN is lower, causes the mark transformation of carrying of southern area Sewage Plant to reach one-level A standard difficulty more.Low carbon-nitrogen ratio sewage is handled the reason that reaches one-level A standard difficulty two aspects:
Conventional treatment process such as A/O, A
2/ O, SBR, various oxidation ditches etc., denitrifying bacterium, nitrobacteria and polyP bacteria are present in the mixed solution that increases that suspends simultaneously, and mud is reciprocation cycle between anaerobism, anoxic and aerobic section.Because nitrobacteria growth is slower, in order to obtain good nitrification effect, need to prolong sludge age (SRT) to improve the nitrifier ratio, and in order to obtain higher dephosphorization efficiency by using, need to reduce SRT so that in time polyP bacteria is discharged from system in the mode of excess sludge, so the required best SRT of nitrated and dephosphorization is inconsistent, nitratedly be difficult to take into account with dephosphorization, especially be difficult to reach simultaneously one-level A and go out water quality standard.
In addition, also exist contradiction between denitrification (being denitrogenation) and the dephosphorization.PolyP bacteria and denitrifying bacteria all need carbon source, and low when carbon-nitrogen ratio, when carbon source is not enough, denitrification efficient is not high, the total nitrogen of one-level A (TN) standard is difficult to reach.Scheme commonly used at present is an additional carbon, as methyl alcohol, but is faced with problems such as cost, transportation safety.
The two faster mud denitrification dephosphorization techniques of development in recent years are because of its " carbon is dual-purpose ", and advantages such as energy efficient have been subjected to paying close attention to widely.In two sludge systems, nitrobacteria separately exists in a fixation reaction pond or the reaction column, to be independent of denitrifying bacterium.Like this, just solved the long and required inconsistent defective of best SRT of polyP bacteria of nitrobacteria aerobic time of needs in single sludge system, denitrification phosphorus-collecting bacterium and nitrobacteria can both grown under the optimum environment separately.In addition, at two sludge systems, nitrobacteria and polyP bacteria are in independently in the system, the organism that the nitration reaction stage consumes, are used as the carbon source of denitrification denitrogenation, dephosphorization, reduce the cost of sewage disposal.
Two sludge systems specifically can be divided into Wanner technology, DEPHANOX technology, A
2N technology and A
2NSBR technology.These technologies have the advantage of two mud methods, but for China's southern area total nitrogen and ammonia nitrogen concentration height, municipal effluent that organic concentration is low, and still there is deficiency in these technologies reaching when one-level A goes out water quality standard.(1) owing to surmounts the ammonia nitrogen that mud carries and to be removed in the subsequent disposal unit, therefore when the water inlet total nitrogen surpasses 25mg/L, existing two mud method water outlet ammonia nitrogen can't reach the maximum discharge standard of one-level A, and the former water of most of municipal wastewater treatment plant is usually above this total nitrogen concentration.(2) second pond mud phosphorus content height, the mud phosphorus content is usually above conventional A
2/ O, even therefore a spot of mud also very easily causes the water outlet total phosphorus to exceed standard with the supernatant liquor outflow, therefore existing two mud method technology water outlet total phosphorus can not stably reaching standard.(3) colloid in the former water and particulate organic matter at anaerobic pond with after second pond mud mixes, enter anoxic pond with mud, in existing two mud method technology, the form of carbon source exists beyond these colloids and the particulate organic matter, be unfavorable for the operation of technology, one, microorganism can utilize this part outer carbon source to carry out denitrification but can not inhale phosphorus, cause the carbon source can not " carbon is dual-purpose ", its two owing to fail abundant hydrolysis, particulate organic matter may enter second pond with the anoxic pond mixed solution, cause releasing phosphorus in the second pond, water outlet exceeds standard; (4) existing two mud method adopts conventional contact oxidation method as nitrification tank usually, and floor space is big, and two mud method is than conventional A
2/ O fado a settling tank, so the excessive contact-oxidation pool of area is not suitable for the Urban areas of land used anxiety.(5) in order to ensure the high deposition efficiency of second pond, existing two mud methods must adopt lower surface load (0.5～0.8m for example
3/ m
2/ h), cause the second pond floor space big.
[utility model content]
When hanging down in order to solve the water inlet carbon-nitrogen ratio, carbon source is not enough to satisfy simultaneously the demand of denitrogenation simultaneously of conventional denitrification dephosphorization technique and dephosphorization, water outlet ammonia nitrogen and total phosphorus instability up to standard, the more high technical problem of capital construction and working cost.The utility model provides a kind of three mud methods nitrated and denitrification dephosphorization treatment system, and the nitrated and denitrification dephosphorization treatment system of described three mud methods comprises: be used for former water is precipitated pretreatment unit with oil removing; The mud that is used for refluxing in sewage that described pretreatment unit is discharged and described two heavy unit carries out the anaerobic unit of anaerobic phosphorus release; Be used for the muddy water that described anaerobic unit is discharged is carried out isolating heavy unit; Be used for the supernatant liquor that discharge described heavy unit is carried out nitrated one-level aeration biological nitration unit; Be used for the sewage through described heavy sedimentary mud in unit and the discharge of described one-level aeration biological nitration unit is carried out the anoxic unit of denitrogenation dephosphorizing; Be used for the muddy water that described anoxic unit is discharged is carried out isolating two heavy unit; Be used for the sewage after described two heavy cell processing is carried out the secondary aeration biological nitration unit of nitration treatment.。
" three mud " described in the utility model is meant: the unitary mud of one-level aeration biological nitration, round-robin active sludge in anaerobic pond, medium sediment pool, anoxic pond and the second pond, and the unitary mud of secondary aeration biological nitration.
According to an optimal technical scheme of the present utility model: described pretreatment unit comprises: be used for former water is carried out sedimentary just heavy unit; Be used for removing the greasy oil removing of the sewage unit that discharge described just heavy unit.
According to an optimal technical scheme of the present utility model: described just heavy unit is a preliminary sedimentation tank, and described oil removing unit is an air flotation pool.
According to an optimal technical scheme of the present utility model: described anaerobic unit is to utilize the denitrification phosphorus-collecting bacterium to carry out anaerobic phosphorus release and absorb in the water anaerobic pond of PHB in the dissolved organic matter compound body.
According to an optimal technical scheme of the present utility model: the nitrated and denitrification dephosphorization treatment system of described three mud methods also comprises: first sludge pump that is used for described two heavy unitary returned sluges are transported to described anaerobic pond.
According to an optimal technical scheme of the present utility model: heavy unit is a medium sediment pool in described, and described one-level aeration biological nitration unit is a BAF.
According to an optimal technical scheme of the present utility model: the nitrated and denitrification dephosphorization treatment system of described three mud methods also comprises: be used for the sedimentary mud of described medium sediment pool is transported to second sludge pump of described anoxic unit and surmounts pipeline.
According to an optimal technical scheme of the present utility model: described anoxic unit comprises: the anaerobism subelement that is used for the sedimentary mud in described heavy unit is carried out anaerobic phosphorus release; Be used for the sewage of discharging through the mud and the described one-level aeration biological nitration unit of described anaerobism subelement anaerobic phosphorus release is carried out the anoxic subelement of denitrification nitrogen and phosphorus removal; Be used for that muddy water mixed solution to the anoxic subelement carries out aerobic suction phosphorus, gas that denitrification is generated carries out stripping, sludge activity is carried out the quick aeration unit of regenerated.
According to an optimal technical scheme of the present utility model: described two heavy unit carry out the second pond of precipitate and separate for the muddy water that described anoxic unit is discharged.
According to an optimal technical scheme of the present utility model: described secondary aeration biological nitration unit is a BAF.
The utility model adopts two mud systems to guarantee that dephosphorization bacterial and nitrifier are in respectively in the suitable separately growing environment, with traditional A
2Technologies such as/O are compared, and have overcome in the conventional denitrification dephosphorization technique contradiction of sludge age between the denitrogenation and dephosphorization, have improved the denitrogenation dephosphorizing effect, have reduced capital construction and working cost.Compare with other pair mud method, the utlity model has following characteristics:
1, the utility model adopts BAF (BAF) as the nitrated unit of one-level aeration, has following characteristics: 1. made full use of the advantage that the BAF nitrification effect is good, floor space is little; 2. traditional B AF is because water inlet COD is higher relatively, therefore need carbonization section degraded COD (carbonization BAF can be set separately or in same BAF, carry out carbonization and nitrated), the carbonization section has increased the residence time of BAF, reduced nitrification effect, because the heterotrophic bacterium growth is fast, viscosity is big, therefore easily stop up simultaneously, the BAF water inlet COD in the utility model is low, therefore the rate of nitrification that has overcome traditional B AF is slow, easily blockage problem.
2, the utility model adopts the nitrated unit of secondary aeration to remove owing to surmount the ammonia nitrogen that mud carries, and existing two mud methods can't reach the ammonia nitrogen emission standard of one-level A when the water inlet total nitrogen surpasses 25mg/L, and the utility model can be stably up to standard.
3, second pond mud phosphorus content height, the mud phosphorus content is usually above conventional A
2/ O, even therefore a spot of mud also very easily causes the water outlet total phosphorus to exceed standard with the supernatant liquor outflow, therefore existing two mud method technology water outlet total phosphorus can not stably reaching standard.The utility model adopts BAF to handle the second pond water outlet, can hold back mud and further aerobic dephosphorization, so the water outlet phosphorus concentration can reach low-down level, is better than the total phosphorus emission standard of one-level A significantly.
4, the utility model is separated out the anaerobism subelement with anoxic pond, colloid in the former water and particulate organic matter at anaerobic pond with after second pond mud mixes, enter the anaerobism subelement with mud, can obtain further acidication, promote the further anaerobic phosphorus release of microorganism, strengthen making full use of of former water COD, prevented that these organism from entering second pond with mixed solution, thereby avoided second pond to release phosphorus and water outlet phosphorus exceeds standard.Account for 30～40% of total flux owing to enter the flow of anaerobism subelement, the actual residence time of mud reaches 1.0～1.5h, helps organic acidication; Anaerobism subelement and anoxic subelement are built jointly, and be simple and compact for structure.
5, in the utility model, medium sediment pool and second pond can be selected high surface load, have reduced the settling tank floor space significantly; Nitrated unit adopts BAF, has reduced floor space.Therefore, the utility model is applicable to the Sewage Plant construction and the transformation demand in the city of land used anxiety.
[description of drawings]
Fig. 1 is the nitrated and denitrification dephosphorization treatment system structural representations of the utility model three mud methods;
Fig. 2 is the schema of the nitrated and denitrification dephosphorization treatment process of the utility model three mud methods;
The particular flow sheet that Fig. 3 handles former water for pretreatment unit;
The particular flow sheet that Fig. 4 handles mud and sewage for anoxic unit;
Fig. 5 is that the formant COD of system changes;
Fig. 6 is that system's formant ammonia nitrogen changes;
Fig. 7 is that system's formant nitric nitrogen changes;
Fig. 8 is a secondary BAF water outlet TN situation;
Fig. 9 is the variation of system's formant ammonia nitrogen, nitric nitrogen, total nitrogen;
Figure 10 is that the formant TP of system changes;
The sludge blanket height changed in time when Figure 11 was sedimentation.
[embodiment]
Below in conjunction with accompanying drawing technical solutions of the utility model are elaborated.
Fig. 1 is the nitrated and denitrification dephosphorization treatment system structural representations of the utility model three mud methods.As shown in Figure 1, the nitrated and denitrification dephosphorization treatment system of three mud methods comprise pretreatment unit 101, anaerobic unit 102, in heavy unit 103, one-level aeration biological nitration unit 104, anoxic unit 105, two heavy unit 106 and secondary aeration biological nitration unit 107.
Described pretreatment unit 101 is used for former water is precipitated and removes grease.In optimal technical scheme of the present utility model, described pretreatment unit 101 specifically comprises just heavy unit 111 and oil removing unit 121.Wherein, the 111 pairs of former water in described just heavy unit precipitate.Enter oil removing unit 121 through the sewage after described just heavy unit 111 precipitation process.Grease in the 121 pairs of sewage in oil removing unit is removed.
In optimal technical scheme of the present utility model, described just heavy unit 111 is a preliminary sedimentation tank, and described oil removing unit 121 is an air flotation pool.
Described anaerobic unit 102 is used for the mud of the sewage of described pretreatment unit 101 discharges and described two heavy unit 106 backflows is carried out anaerobic phosphorus release, in optimal technical scheme of the present utility model, described anaerobic unit 102 is for to utilize the denitrification phosphorus-collecting bacterium to carry out the anaerobic pond of anaerobic phosphorus release.In this anaerobic pond, hydraulic detention time is 1.0～1.5h, the returned sluge mixing formation muddy water mixed solution that sewage and described two heavy unit 106 are carried after described preliminary sedimentation tank and described oil removing pre-treatment, the denitrification phosphorus-collecting bacterium under anaerobic gathers phosphorus in the hydrolysis body, form with the ortho-phosphoric acid root is discharged in the water, and the interior PHB of deliquescent organism compound body in the absorption water, hydraulic detention time is 1.0～1.5h.
In optimal technical scheme of the present utility model, the nitrated and denitrification dephosphorization treatment system of described three mud methods comprises that also first sludge pump, 162, the first sludge pumps 162 are used for the returned sluges of described two heavy unit 106 are transported to described anaerobic pond.
Heavy unit 103 is used for the muddy water that described anaerobic unit 102 is discharged is separated in described, and surface load is 1.0～2.0m
3/ m
2/ h, supernatant liquor enter described one-level aeration biological nitration unit 104.Described one-level aeration biological nitration unit 104 is used for the supernatant liquor that discharge described heavy unit 103 is carried out nitrated, hydraulic detention time 1.0～1.5h.Ammonia nitrogen in the sewage and organonitrogen be ammonia nitrogen after ammonification is handled, and again by the nitrated one-tenth nitrate nitrogen of biological nitration effect, described one-level aeration biological nitration pond can reach 90-95% to the nitrification effect of sewage.
In optimal technical scheme of the present utility model, described in heavy unit 103 be medium sediment pool, described one-level aeration biological nitration unit 104 is a BAF.
In the optimal technical scheme of the present utility model, nitrated and the denitrification dephosphorization treatment system of described three mud methods also comprises second sludge pump 145 and surmounts pipeline 235, described second sludge pump 145 and surmount pipeline 235 and be used for the sedimentary mud of described medium sediment pool is transported to described anoxic unit 105.
Described anoxic unit 105 is used for the sewage through described heavy unit 103 sedimentary mud and 104 discharges of described one-level aeration biological nitration unit is carried out denitrogenation dephosphorizing.Described anoxic unit 105 adopts anaerobism section, anoxic section and aeration section Round Sump structure.
In optimal technical scheme of the present utility model, described anoxic unit 105 comprises: anaerobism subelement 115, anoxic subelement 125 and quick aeration subelement 135.In described anaerobism subelement 115, hydraulic detention time is about 20～30min, heavy unit 103 sedimentary mud carry out therein further anaerobic phosphorus release in described, on the one hand, can be with the further acidication of colloid and particulate organic matter in the medium sediment pool mud, microorganism utilizes the further anaerobic phosphorus release of solvability carbon source behind the acidication.On the other hand, when entering organic matter of water concentration very low, cause described anaerobic unit 102 to release phosphorus when insufficient, can improve the effect of releasing phosphorus by adding additional carbon to described anaerobism subelement 115, thereby the efficient that the raising system releases phosphorus and inhales phosphorus, anaerobism subelement hydraulic detention time is 20～30min.At anoxic subelement 125, the time of hydraulic retention is 2.0～2.5h, the sewage of discharging through the mud and the described one-level aeration biological nitration unit 104 of described anaerobism subelement 115 anaerobic phosphorus releases mixes in described anoxic subelement 125 once more, denitrification phosphorus-collecting bacterium in the described anoxic subelement 125 is PHB in the electron acceptor(EA) oxysome with the nitric nitrogen, and thereby excess absorbs in the water poly-phosphorus in the ortho-phosphoric acid root compound body, finishes the processing of denitrogenation dephosphorizing.Through behind the denitrogenation dephosphorizing of described anoxic subelement 125, aeration subelement 135 further absorbs the phosphorus in the muddy water mixed solution of anoxic subelement 125 by aerobic suction phosphorus fast, the gas and the regeneration sludge activity of stripping denitrification generation simultaneously, aeration time 20～30min fast.
Described two heavy unit 106 are used for the muddy water that described anoxic unit 105 is discharged is separated, and finish final mud-water separation, second pond surface load 1.0～2.0m
3/ m
2/ h.。After described two heavy unit 106 mud-water separation, the supernatant liquor of allow compliance with emission standards enters water drain or conduct greening water, a sedimentary mud part is transported to described anaerobic pond by described first sludge pump 162 with the form of returned sluge, a part is finally finished the removal of phosphor in sewage with the form discharging of excess sludge in addition.
In optimal technical scheme of the present utility model, nitrated and the denitrification dephosphorization treatment system of described three mud methods also comprises secondary aeration biological nitration unit 107, described secondary aeration biological nitration unit 107 is used for the sewage after handling through described two heavy unit 106 is carried out nitration treatment, and hydraulic detention time is 20～30min.Nitrated and denitrification dephosphorization treatment system increases described secondary aeration biological nitration unit 107 and is primarily aimed at and surmounts the ammonia nitrogen that carries in the mud and cause ammonia nitrogen in the supernatant liquor that described two heavy unit 106 discharge not reach the situation of emission standard in three mud methods.By further nitration treatment, the ammonia nitrogen in the final outflow water of assurance system reaches emission standard, further reduces water outlet SS, TP simultaneously.In optimal technical scheme of the present utility model, described secondary aeration biological nitration unit 107 is a BAF.
Fig. 2 is the schema of the nitrated and denitrification dephosphorization treatment process of the utility model three mud methods.As shown in Figure 2, the nitrated and denitrification dephosphorization treatment process of three mud methods comprises:
S101, pretreatment unit precipitate former water and grease is removed;
S102, anaerobic unit are carried out anaerobic phosphorus release to the sewage of described pretreatment unit discharge and the mud of two heavy unit backflows;
S103, in heavy unit muddy water that described anaerobic unit is discharged separate;
The supernatant liquor that discharge heavy unit in described S104, one-level aeration biological nitration unit carries out nitrated;
The sewage that S105, anoxic unit are discharged heavy sedimentary mud in unit and described one-level aeration biological nitration unit in described carries out denitrogenation dephosphorizing;
The muddy water that discharge described anoxic unit S106, two heavy unit separates;
The supernatant liquor that discharge described two heavy unit S107, secondary aeration biological nitration unit carries out nitrated.
The particular flow sheet that Fig. 3 handles former water for pretreatment unit.As shown in Figure 3, in optimal technical scheme of the present utility model, pretreatment unit is handled specifically former water and is comprised:
S311, just heavy unit precipitates former water;
The grease in the sewage of discharging described just heavy unit is removed in S321, oil removing unit.
In optimal technical scheme of the present utility model, carry out after the S106: first sludge pump is transported to described anaerobic unit with described two heavy unitary returned sluges.
In optimal technical scheme of the present utility model, carry out after the S103, before the S105: second sludge pump and surmount pipeline and will sink the sedimentary mud in unit in described and be transported to described anoxic unit.
The particular flow sheet that Fig. 4 handles mud and sewage for anoxic unit.As shown in Figure 4, in optimal technical scheme of the present utility model, anoxic unit is handled specifically mud and sewage and is comprised:
S415, anaerobism subelement are to the heavy further anaerobic phosphorus release of the sedimentary mud in unit in described; Be the anaerobism subelement to colloid and the further acidication of particulate organic matter in the sedimentary mud in heavy unit in described, promote the further anaerobic phosphorus release of solvability carbon source after microorganism utilizes acidication, hydraulic detention time is 20～30min.
S425, anoxic subelement carry out denitrification nitrogen and phosphorus removal to the sewage of discharging through the mud and the described one-level aeration biological nitration unit of described anaerobism subelement anaerobic phosphorus release; That is, the anoxic subelement carries out denitrification nitrogen and phosphorus removal to the sewage of discharging through the mud and the described one-level aeration biological nitration unit of the further anaerobic phosphorus release of described anaerobism subelement, and hydraulic detention time is 2.0～2.5h;
S435, fast aeration unit to the muddy water mixed solution of anoxic subelement carry out aerobic suction phosphorus, gas that denitrification is generated carries out stripping, sludge activity regenerated.The aeration unit hydraulic detention time is 20～30min fast.
The utility model adopts two mud systems to guarantee that dephosphorization bacterial and nitrifier are in respectively in the suitable separately growing environment, with traditional A
2Technologies such as/O are compared, and have overcome in the conventional denitrification dephosphorization technique contradiction of sludge age between the denitrogenation and dephosphorization, have improved the denitrogenation dephosphorizing effect, have reduced capital construction and working cost.Compare with other pair mud method, the utlity model has following characteristics:
1, the utility model adopts BAF (BAF) as the nitrated unit of one-level aeration, has following characteristics: 1. made full use of the advantage that the BAF nitrification effect is good, floor space is little; 2. traditional B AF is because water inlet COD is higher relatively, therefore need carbonization section degraded COD (carbonization BAF can be set separately or in same BAF, carry out carbonization and nitrated), the carbonization section has increased the residence time of BAF, reduced nitrification effect, because the heterotrophic bacterium growth is fast, viscosity is big, therefore easily stop up simultaneously, the BAF water inlet COD in the utility model is low, therefore the rate of nitrification that has overcome traditional B AF is slow, easily blockage problem.
2, the utility model adopts the nitrated unit of secondary aeration to remove owing to surmount the ammonia nitrogen that mud carries, and existing two mud methods can't reach the ammonia nitrogen emission standard of one-level A when the water inlet total nitrogen surpasses 25mg/L, and the utility model can be stably up to standard.
3, second pond mud phosphorus content height, the mud phosphorus content is usually above conventional A
2/ O, even therefore a spot of mud also very easily causes the water outlet total phosphorus to exceed standard with the supernatant liquor outflow, therefore existing two mud method technology water outlet total phosphorus can not stably reaching standard.The utility model adopts BAF to handle the second pond water outlet, can hold back mud and further aerobic dephosphorization, so the water outlet phosphorus concentration can reach low-down level, is better than the total phosphorus emission standard of one-level A significantly.
4, the utility model is separated out the anaerobism subelement with anoxic pond, colloid in the former water and particulate organic matter at anaerobic pond with after second pond mud mixes, enter the anaerobism subelement with mud, can obtain further acidication, promote the further anaerobic phosphorus release of microorganism, strengthen making full use of of former water COD, prevented that these organism from entering second pond with mixed solution, thereby avoided second pond to release phosphorus and water outlet phosphorus exceeds standard.Account for 30～40% of total flux owing to enter the flow of anaerobism subelement, the actual residence time of mud reaches 1.0～1.5h, helps organic acidication; Anaerobism subelement and anoxic subelement are built jointly, and be simple and compact for structure.
5, medium sediment pool and second pond can be selected high surface load in the utility model, have reduced the second pond floor space significantly; Nitrated unit adopts BAF, has reduced floor space.Therefore, the utility model is applicable to the Sewage Plant construction and the transformation demand in the city of land used anxiety.
With living quarters, campus, Shenzhen sewage is former water, former water COD=120-300mg/L, NH
4 +=28-60mg/L, TN=33-75mg/L, average COD/TN=5.0, TP=4.2-6.3mg/L, pH=6.5-7.5, the processing water yield is 1.0m
3/ h.
Main design parameters: anaerobic pond HRT=1.0h, medium sediment pool, second pond surface load 1.6m
3/ m
2/ h, anoxic pond HRT=3.0h, one-level aeration biological nitration unit (one-level BAF) HRT=1.0h, secondary aeration biological nitration unit (one-level BAF) HRT=0.5h surmounts mud and sludge back flow quantity and is controlled at 33% of flooding quantity.
Fig. 5 is that the formant COD of system changes; Fig. 6 is that system's formant ammonia nitrogen changes; Fig. 7 is that system's formant nitric nitrogen changes; Fig. 8 is a secondary BAF water outlet TN situation; Fig. 9 is the variation of system's formant ammonia nitrogen, nitric nitrogen, total nitrogen; Figure 10 is that the formant TP of system changes; The sludge blanket height changed in time when Figure 11 was sedimentation.Shown in Fig. 5,6,7,8,9,10 and 11.Through nearly bimestrial operation, about the average 30mg/L of water outlet COD, the average 0.19mg/L of water outlet TP, NH
4 +Average 3.6mg/L, the average 10.8mg/L of TN.High TN load can bear in this system, when TN reaches 60mg/L, and water outlet NH
4 +Still can reach one-level A standard, i.e. NH with TN
4 +Be lower than 5mg/L, TN is lower than 15mg/L.
Above content be in conjunction with concrete optimal technical scheme to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. nitrated and denitrification dephosphorization treatment system of mud method is characterized in that: the nitrated and denitrification dephosphorization treatment system of described three mud methods comprises:
Be used for former water is precipitated the pretreatment unit of removing with grease (101);
The mud that is used for refluxing in sewage that described pretreatment unit (101) is discharged and two heavy unit (106) carries out the anaerobic unit (102) of anaerobic phosphorus release;
Be used for the muddy water that described anaerobic unit (102) is discharged is carried out isolating heavy unit (103);
Be used for the supernatant liquor that discharge described heavy unit (103) is carried out nitrated one-level aeration biological nitration unit (104);
Be used for the sewage through described heavy sedimentary mud in unit (103) and described one-level aeration biological nitration unit (104) discharge is carried out the anoxic unit (105) of denitrogenation dephosphorizing;
Be used for the muddy water that described anoxic unit (105) is discharged is carried out isolating two heavy unit (106);
Be used for the sewage of discharging through described two heavy unit (106) is carried out the secondary aeration biological nitration unit (107) of nitration treatment.
2. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of claim 1, it is characterized in that: described pretreatment unit (101) comprising:
Be used for former water is carried out sedimentary just heavy unit (111);
Be used for removing the greasy oil removing of the sewage unit (121) that discharge described just heavy unit (111).
3. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of claim 2, it is characterized in that: described just heavy unit (111) is a preliminary sedimentation tank, and described oil removing unit (121) is an air flotation pool.
4. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of claim 1, it is characterized in that: described anaerobic unit (102) is carried out anaerobic phosphorus release for utilizing the denitrification phosphorus-collecting bacterium, and absorbs the anaerobic pond of the interior PHB of dissolved organic matter compound body in the water.
5. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of claim 4, it is characterized in that the nitrated and denitrification dephosphorization treatment system of described three mud methods also comprises: first sludge pump (162) that is used for the returned sluges of described two heavy unit (106) are transported to described anaerobic pond.
6. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of claim 1, it is characterized in that: heavy unit (103) is a medium sediment pool in described; Described one-level aeration biological nitration unit (104) is a BAF.
7. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of claim 6, it is characterized in that: the nitrated and denitrification dephosphorization treatment system of described three mud methods also comprises: be used for the sedimentary mud of described medium sediment pool is transported to second sludge pump (145) of described anoxic unit (105) and surmounts pipeline (235).
8. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of the arbitrary claim of claim 1 to 7, it is characterized in that: described anoxic unit (105) comprising:
Be used for the sedimentary mud in described heavy unit (103) is carried out the anaerobism subelement (115) of anaerobic phosphorus release;
Be used for the sewage of discharging through the mud and the described one-level aeration biological nitration unit (104) of described anaerobism subelement (115) anaerobic phosphorus release is carried out the anoxic subelement (125) of denitrification nitrogen and phosphorus removal;
Be used for that muddy water mixed solution to anoxic subelement (125) carries out aerobic suction phosphorus, gas that denitrification is generated carries out stripping, sludge activity is carried out the quick aeration unit of regenerated (135).
9. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of claim 1, it is characterized in that: described two heavy unit (106) carry out the second pond of precipitate and separate for the muddy water that described anoxic unit (105) is discharged.
10. according to the nitrated and denitrification dephosphorization treatment system of the described three mud methods of claim 1, it is characterized in that described secondary aeration biological nitration unit (107) is a BAF.
Priority Applications (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585226A (en) * | 2016-03-04 | 2016-05-18 | 云南大学 | AAONAO continuous flow two-sludge denitrification advanced nitrogen removal and dephosphorization device and technology based on online control |
| CN106745826A (en) * | 2017-03-07 | 2017-05-31 | 四川建筑职业技术学院 | A kind of office building comprehensive sewage treatment device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585226A (en) * | 2016-03-04 | 2016-05-18 | 云南大学 | AAONAO continuous flow two-sludge denitrification advanced nitrogen removal and dephosphorization device and technology based on online control |
| CN105585226B (en) * | 2016-03-04 | 2018-02-06 | 云南大学 | A kind of AAONAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus and technique based on On-line Control |
| CN106745826A (en) * | 2017-03-07 | 2017-05-31 | 四川建筑职业技术学院 | A kind of office building comprehensive sewage treatment device |
| CN106745826B (en) * | 2017-03-07 | 2020-11-03 | 四川建筑职业技术学院 | Office building sewage comprehensive treatment device |
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