CN103663867B - Device and method of residual sludge alkaline fermentation and inner carbon source development technology coupled with A-A-O nitrogen and phosphorous removal system - Google Patents
Device and method of residual sludge alkaline fermentation and inner carbon source development technology coupled with A-A-O nitrogen and phosphorous removal system Download PDFInfo
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Abstract
The invention discloses a device and a method of a residual sludge alkaline fermentation and inner carbon source development technology coupled with an A-A-O nitrogen and phosphorous removal system, and belongs to the field of environmental protection. Residual sludge is inoculated to an anaerobic fermentation integrated device, an alkali solution is pumped into the anaerobic fermentation integrated device, a blender is started, and the alkali solution is discontinuously fed. A fermented liquid is discharged from the top and goes into an external sedimentation area, at the same time, a certain proportion of nitrification liquid in the A-A-O system is subjected to pre-denitrification denitrogenation in the external sedimentation area of the anaerobic fermentation integrated device, an effluent of the sedimentation area is subjected to N and P recovery in a mid-sedimentation tank, and after the fermentation liquid is subjected to slurry water separation and then goes into the A-A-O system for nitrogen and phosphorous removal treatment; the A-A-O system residual sludge flows back to an internal reaction area of the anaerobic fermentation integrated device. Culture conditions comprise that the temperature is 20-30 DEG C, the pH is 9-10, and the concentration of dissolved oxygen is 0-0.1 mg/L. The problems of low acid production amount of fermentation of activated sludge and insufficient carbon sources in the A-A-O nitrogen and phosphorous removal system are solved. The anaerobic fermentation technology, anaerobic/anoxic/aerobic technology, physical sedimentation technology and chemical sedimentation technology are effectively combined together by the method.
Description
Technical field
The present invention relates to the apparatus and method of excess sludge alkaline fermentation exploitation internal carbon source coupling A-A-O denitrification dephosphorization system, belong to environmental technology field.By actings in conjunction such as acidication bacterium, nitrifier, denitrifying bacteria, polyP bacterias, realize sludge fermentation liquid as carbon source supply A-A-O denitrification dephosphorization system, compensate for system carbon source deficiency and cause the problem that denitrogenation dephosphorizing efficiency is lower, sludge fermentation system achieves the object of mud decrement by effects such as the predation between microorganism, decomposition, dissolvings simultaneously.
Background technology
A-A-O technique is that sewage work is carrying out denitrogenation dephosphorizing, removing a kind of conventional process of COD, its technique is simple, treatment effect is stablized, but the sewage character received along with sewage work and country are to sewage discharge and sludge treatment policy changes, it is urgently to be resolved hurrily that A-A-O technique faces series of problems, as, because the not enough denitrogenation of carbon source and dephosphorization can not two, running cost is increased because adding outer carbon source, because sludge yield is excessive, sludge treatment factory has to spend a large amount of manpowers, financial resources carry out the process such as Sludge landfill, burning.These problems all can cause the secondary pollution of environment, and therefore solution sewage work carbon source deficiency and sludge handling problem are difficult problems now urgently to be resolved hurrily.
Containing abundant organic substance in excess sludge, organism in mud can produce the materials such as voltaile fatty acid, hydrogen, methane through anaerobically fermenting, wherein voltaile fatty acid can be used for the supplementary carbon source of urban sewage treatment system, also can effectively by mud decrement while anaerobic sludge digestion.
If sludge anaerobic fermentation and the process of A-A-O denitrogenation dephosphorizing are combined closely, not only solve the problem of sewage work's carbon source deficiency, and significantly can reduce surplus sludge volume.
Summary of the invention
The present invention is directed to that A-A-O denitrification dephosphorization system carbon source is not enough, problem that denitrification denitrogenation and poly-phosphorus effect can not well coexist and the problem such as A-A-O technique excess sludge is difficult, propose a kind of anaerobic sludge digestion also as a supplement carbon source enter A-A-O system, carry out denitrogenation dephosphorizing process, a nitrification liquid part in A-A-O system is back to the pre-anaerobic treatment in settling region of sludge aerobic digestion device, carry out denitrification denitrogenation process in early stage, not only reduce dissolved oxygen releases phosphorus impact on polyP bacteria, strengthen polyP bacteria in oxygen-starved area denitrification dephosphorization effect simultaneously.Part residual sludge reflux, to sludge fermentation system-reaction zone, is not only acidication bacterium in system and provides matrix, decrease the quantity discharged of mud simultaneously.
The device of excess sludge alkaline fermentation exploitation internal carbon source coupling A-A-O denitrification dephosphorization system, its feature is as follows:
Device comprises: anaerobically fermenting integration apparatus 1, A-A-O sludge denitrification dephosphorization system 2, medium sediment pool 3, second pond 4, fermented sludge case 5, dilution water tank 6, produces water tank 7, sludge box 8, alkaline agent case 9, medicament of phosphate case 10, magnesium salts chemical tank 11, fermentation equipment agitator 12, A-A-O system stirrer the 13, one pH determinator 14, ORP determinator the 15, one DO determinator 16,2nd pH determinator 17, first gas meter 18, second gas meter 19, first aerating apparatus 20, second aerating apparatus the 21, two DO determinator 22; First nitrification liquid reflux pump 2.1, second Digestive system reflux pump 2.2, first sludge reflux pump 4.1, second sludge reflux pump 4.2, first fermented sludge pump 5.1, second fermented sludge pump 5.2, dilution pumps 6.1, working shaft 7.1, sludge pump 8.1, alkaline agent pump 9.1, medicament of phosphate pump 10.1, magnesium salts compound pump 11.1;
Described anaerobically fermenting integration apparatus 1 is by modification SBR and settling tank clustered aggregates, and it is internal-response district that SBR is arranged on inner, and it is outside settling region that settling tank is arranged on outside; First aerating apparatus 20 is set in internal precipitate district, fermentation equipment agitator the 12, one pH determinator 14, ORP determinator 15, a DO determinator 16; In outside settling region, the 2nd pH determinator 17 is set; Wherein fermented sludge case 5 is connected with the outside settling region of anaerobically fermenting integration apparatus 1 by the first sludge reflux pump 5.1, and fermented sludge case 5 is connected with anaerobically fermenting integration apparatus 1 internal-response district by the second sludge reflux pump 5.2; Dilution water tank 6 is connected with the outside settling region of anaerobically fermenting integration apparatus 1 by dilution pumps 6.1; Sludge box 8 is connected with anaerobically fermenting integration apparatus 1 internal-response district by sludge pump 8.1, and sludge box 8 is connected with second pond 4 by the second sludge pump 4.2; Alkaline agent case 9 is connected with anaerobically fermenting integration apparatus 1 internal-response district by alkaline agent pump 9.1; Anaerobically fermenting integration apparatus 1 outside settling region water outlet is connected from flowing into medium sediment pool 3; Medicament of phosphate case 10 is connected with medium sediment pool 3 by medicament of phosphate pump 10.1; Magnesium salts chemical tank 11 is connected with medium sediment pool 3 by magnesium salts compound pump 11.1; Medium sediment pool 3 is connected with product water tank 7 by pipeline; Produce water tank 7 to be connected with A-A-O sludge denitrification dephosphorization system 2 by working shaft 7.1; The outside settling region of anaerobically fermenting integration apparatus 1 arranges the first water outlet 1.1, second water outlet the 1.3, three water outlet 1.4; Anaerobically fermenting integration apparatus 1 internal-response district sets out the mouth of a river 1.2;
Described A-A-O sludge denitrification dephosphorization system 2 is divided into 3 parts, and the first lattice are anaerobism section, and the second lattice, the 3rd lattice, the 4th lattice are anoxic section, and the 5th lattice, the 6th lattice, the 7th lattice, the 8th lattice are aerobic section; First lattice, arrange in the second lattice, the 3rd lattice, the 4th lattice in A-A-O system stirrer the 13, five lattice to arrange in the 2nd DO determinator the 22, five lattice, the 6th lattice, the 7th lattice, the 8th lattice and arrange filler, and filler ratio is 40%; Wherein the 8th lattice are connected with A-A-O sludge denitrification dephosphorization system 2 second lattice by the first nitrification liquid reflux pump 2.1, and the 8th lattice are connected with the outside settling region of anaerobically fermenting integration apparatus 1 by the second nitrification liquid reflux pump 2.2; 8th lattice water outlet is connected with second pond 4; Second pond 4 is connected with A-A-O sludge denitrification dephosphorization system 2 first lattice by the first sludge reflux pump 4.1, and second pond 4 is connected with sludge box 8 by the second sludge reflux pump 4.2.
Apply the method for described excess sludge alkaline fermentation exploitation internal carbon source coupling A-A-O denitrification dephosphorization system, its feature is as follows, comprises the following steps:
1) getting SBR pilot scale mud is sludge fermentation device and A-A-O sludge denitrification dephosphorization system 2 primary starting mud, first cleans SBR pilot scale mud, to remove inorganic particle in mud, SCOD, NH
4-N, NO
3-N material; Cleaning secondary fermentation apparatus sewage sludge concentration MLSS=9000-10000mg/L, SCOD=30-40mg/L, temperature of reactor is 20-30 DEG C, pH=9-10; A-A-O sludge denitrification dephosphorization system 2 sludge concentration MLSS=2000-3000mg/L, SCOD=30-40mg/L, temperature of reactor is that 20-30 DEG C, pH=6.5-7.5, A-A-O system anaerobism section, anoxic section and aerobic segment body amass ratio, i.e. V
detest: V
lack: V
good=1.5:4.5:4, the C/N mass ratio in Controlling System, i.e. C/N=4-5, aerobic section DO=2-3mg/L;
2) store in sludge box 8 for fermentation unit mud; Preparation 1mol/L-2mol/LNaOH solution is in alkaline agent case 9, start sludge pump 8.1 excess sludge in sludge box 8 to be squeezed in anaerobically fermenting integration apparatus 1 reaction zone, start alkali pump 9.1 pumps in anaerobically fermenting integration apparatus reaction zone simultaneously by NaOH solution, start fermentation equipment agitator 12 to stir with the speed of 30rmp/min, alkali lye is mixed with mud, carries out SCOD, TVFA, NH simultaneously
4-N, PO
4 3-index determining, when ferment 7-9 days time reactor in SCOD=3000-3500mg/L, TVFA=1000-1500mgSCOD/L, NH
4-N=200-250mg/L, PO
4 3-=50-55mg/L and maintain 5-6 days, sludge age SRT=5-10 days in reactor, regularly from mud discharging mouth 1.2 spoil disposal, anaerobically fermenting integration apparatus 1 spoil disposal is than for 10:1 and internal-response district volume: spoil disposal volume=10:1; Start sludge pump 8.1, pump into the fresh sludge of equivalent in anaerobically fermenting integration apparatus 1 internal-response district, the fermented sludge of discharging inserts outside settling region, sanitary sewage is delivered to outside settling region from dilution water tank 6 and is diluted by startup dilution pumps 6.1, diluent gravity flow enters medium sediment pool 3, starts medicament of phosphate pump 10.1 by the NaHPO of 1mol/L simultaneously
4be connected with medium sediment pool by medicament of phosphate pump 10.1 from medicament of phosphate case 10, start magnesium salts compound pump 11.1 by 1mol/LMgCl
2be connected with medium sediment pool by magnesium salts compound pump 11.1 from magnesium salts chemical tank 11, make MgCl
2, NH
4-N and PO
4 3-in pipe core, form struvite precipitation, and reclaim bottom medium sediment pool; Medium sediment pool produces water and produces water tank 7 from flowing into, and produces water tank 7 and is connected with A-A-O sludge denitrification dephosphorization system 2 by working shaft 7.1; Start the first Digestive system reflux pump 2.1, nitrification liquid being back to A-A-O has anoxic section first lattice, and its reflux ratio is 100%; Start the second nitrification liquid reflux pump 2.2, nitrification liquid is back to the outside settling region of anaerobically fermenting integration apparatus 1, its reflux ratio is 250%; Start the first sludge reflux pump 4.1, by sludge reflux to A-A-O sludge denitrification dephosphorization system, its anaerobism section reflux ratio is 80%; Start the second mud tap aspirator 4.2, by sludge reflux to sludge box 8, its reflux ratio is 20%, and by sludge pump 8.1, mud is pumped into anaerobically fermenting integration apparatus 1 internal-response district; Start the first fermented sludge pump 5.1 outside settling region fermented sludge is back to fermented sludge case 5 through the second fermented sludge reflux pump 5.2, fermented sludge is back to integration apparatus internal-response district again.
Advantage of the present invention:
1, the pre-anaerobic treatment outside fermentation equipment, makes part nitrification liquid utilize carbon source to shift to an earlier date denitrification denitrogenation in fermentation unit settling region, alleviates denitrification denitrogenation and denitrifying phosphorus uptake carbon resource shortage problem in anoxic section.
2, medium sediment pool is set, and adds MgCl at medium sediment pool pipe core place
2, NaHPO
4form high purity struvite, and precipitation reclaims at the bottom of medium sediment pool, carries out NH
4-N, PO
4 3-removal.
3, the pre-anaerobic treatment outside fermentation equipment, in advance denitrification denitrogenation, remove oxygen a small amount of in water inlet, ensure that the anaerobic environment of anaerobism section, make polyP bacteria fully release phosphorus in anaerobism section, store a large amount of PHB, for follow-up suction phosphorus provides energy.
4, by residual sludge reflux to anaerobic ferment devices, on the one hand solve fermentation unit bacterial classification and fermented substrate problem, solve excess sludge discharge problem simultaneously.
5, take fermented liquid as carbon source, solve denitrification dephosphorization system carbon source shortage problem.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram of excess sludge alkaline fermentation of the present invention exploitation internal carbon source coupling A-A-O denitrification dephosphorization system
Anaerobically fermenting integration apparatus-1 in figure, A-A-O sludge denitrification dephosphorization system-2, first nitrification liquid reflux pump-2.1, second nitrification liquid reflux pump-2.2, medium sediment pool-3, second pond-4, first sludge reflux pump-4.1, second sludge reflux pump-4.2, fermented sludge case-5, first fermented sludge pump-5.1, second fermented sludge pump-5.2, dilution water tank-6, dilution pumps-6.1, produce water tank-7, working shaft-7.1, sludge box-8, sludge pump-8.1, alkaline agent case-9, alkaline agent pump-9.1, medicament of phosphate case-10, medicament of phosphate pump-10.1, magnesium salts chemical tank-11, magnesium salts compound pump-11.1, fermentation equipment agitator-12, A-A-O system stirrer-13, one pH determinator 14, ORP determinator-15, one DO determinator-16, 2nd pH determinator-17, first gas meter-18, second gas meter-19, first aerating apparatus-20, second aerating apparatus-21, 2nd DO determinator-22.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further: Fig. 1 is the device of excess sludge alkaline fermentation of the present invention exploitation internal carbon source coupling A-A-O denitrification dephosphorization system, comprise anaerobically fermenting integration apparatus 1, A-A-O sludge denitrification dephosphorization system 2, first nitrification liquid reflux pump 2.1, second nitrification liquid reflux pump 2.2, medium sediment pool 3, second pond 4, first sludge reflux pump 4.1, second sludge reflux pump 4.2, fermented sludge case 5, first fermented sludge pump 5.1, second fermented sludge pump 5.2, dilution water tank 6, dilution pumps 6.1, produce water tank 7, working shaft 7.1, sludge box 8, sludge pump 8.1, alkaline agent case 9, alkaline agent pump 9.1, medicament of phosphate case 10, medicament of phosphate pump 10.1, magnesium salts chemical tank 11, magnesium salts compound pump 11.1, fermentation equipment agitator 12, A-A-O system stirrer 13, one pH determinator 14, ORP determinator 15, one DO determinator 16, 2nd pH determinator 17, first gas meter 18, second gas meter 19, first aerating apparatus 20, second aerating apparatus 21, 2nd DO determinator 22.
Wherein anaerobically fermenting integration apparatus 1 point of two portions, are respectively internal-response district, internal precipitate district.Internal precipitate district arranges the first aerating apparatus 20, fermentation equipment agitator the 12, one pH determinator 14, ORP determinator 15 and a DO determinator 16.Outside settling region arranges the 2nd pH determinator 17.Wherein fermented sludge case 5 is connected with the outside settling region of anaerobically fermenting integration apparatus 1 by the first sludge reflux pump 5.1, and fermented sludge case 5 is connected with anaerobically fermenting integration apparatus 1 internal-response district by the second sludge reflux pump 5.2.Dilution water tank 6 is connected with the outside settling region of anaerobically fermenting integration apparatus 1 by dilution pumps 6.1.Sludge box 8 is connected with anaerobically fermenting integration apparatus 1 internal-response district by sludge pump 8.1, and sludge box 8 is connected with second pond 4 by sludge pump 4.2.Alkaline agent case 9 is connected with anaerobically fermenting integration apparatus 1 internal-response district by alkaline agent pump 9.1.Anaerobically fermenting integration apparatus 1 outside settling region water outlet is connected with medium sediment pool 3 by water pipe.Medicament of phosphate case 10 is connected with medium sediment pool 3 by medicament of phosphate pump 10.1.Magnesium salts chemical tank 11 is connected with medium sediment pool 3 by magnesium salts compound pump 11.1.Medium sediment pool 3 is connected with product water tank 7 by pipeline.Produce water tank 7 to be connected with A-A-O sludge denitrification dephosphorization system 2 by working shaft 7.1.The outside settling region of anaerobically fermenting integration apparatus 1 arranges the first water outlet 1.1, second water outlet the 1.3, three water outlet 1.4, and anaerobically fermenting integration apparatus 1 internal-response district sets out the mouth of a river 1.2.
Wherein A-A-O sludge denitrification dephosphorization system 2 is divided into 3 parts, and the first lattice are anaerobic zone, and the second lattice, the 3rd lattice, the 4th lattice are anoxic section, and the 5th lattice, the 6th lattice, the 7th lattice, the 8th lattice are aerobic section.First lattice, arrange in the second lattice, the 3rd lattice, the 4th lattice in A-A-O system stirrer the 13, five lattice to arrange in the 2nd DO determinator the 22, five lattice, the 6th lattice, the 7th lattice, the 8th lattice and arrange polyethylene annulus filler.8th lattice are connected with A-A-O sludge denitrification dephosphorization system 2 second lattice by the first nitrification liquid reflux pump 2.1, and the 8th lattice are connected with the outside settling region of anaerobically fermenting integration apparatus 1 by the second nitrification liquid reflux pump 2.2.8th lattice water outlet gravity flow enters second pond 4.Second pond 4 is connected with A-A-O sludge denitrification dephosphorization system 2 first lattice by the first sludge reflux pump 4.1, and second pond 4 is connected with sludge box 8 by the second sludge reflux pump 4.2.
Case study on implementation
Anaerobically fermenting integration apparatus internal-response district volume is 20L, and outside settling region volume is 75L.
A-A-O denitrification dephosphorization system volume is the water inlet of 40L, HRT=10h, SRT=15d, A-A-O denitrification dephosphorization system is Beijing University of Technology's dependents' district cesspool sewage, and its index is SCOD=200-300mg/L, NH
4-N=55-60mg/L, NO
3-N=0mg/L, NO
2-N=0mg/L, PO
4 3-=5-7mg/L.
1) getting SBR pilot scale mud is sludge fermentation device and A-A-O primary starting mud, first cleans SBR pilot scale mud, to remove inorganic particle in mud, SCOD, NH
4-N, NO
3-N material.Cleaning secondary fermentation apparatus sewage sludge concentration MLSS=9000-10000mg/L, SCOD=30-40mg/L, temperature of reactor is 20-30 DEG C, pH=9-10.A-A-O reactor sludge concentration MLSS=2000-3000mg/L, SCOD=30-40mg/L.A-A-O temperature of reactor controls to control at 6.5-7.5 at 20-30 DEG C, pH.System anaerobism section, anoxic section and aerobic segment body are long-pending, V
detest: V
lack: V
good=1.5:4.5:4, the C/N mass ratio in Controlling System, C/N is 4-5, aerobic section DO=2-3mg/L.
2) store in sludge box 8 for fermentation unit mud.Preparation 1mol/LNaOH solution is in alkaline agent case 9, start sludge pump 8.1 excess sludge in sludge box 8 to be squeezed in anaerobically fermenting integration apparatus 1 reaction zone, start alkali pump 9.1 pumps in anaerobically fermenting integration apparatus reaction zone simultaneously by NaOH solution, start fermentation equipment agitator 12 with the speed low rate mixing of 30rmp/min, alkali lye is mixed with mud, carries out SCOD, TVFA, NH simultaneously
4-N, PO
4 3-index determining, when ferment 7-9 days time reactor in SCOD=3000-3500mg/L, TVFA=1000-1500mgSCOD/L, NH
4-N=200-250mg/L, PO
4 3-=50-55mg/L and can maintain 5-6 days, sludge age SRT=8 days in reactor, regularly from mud discharging mouth 1.2 spoil disposal, anaerobically fermenting integration apparatus 1 spoil disposal is than being 10:1 and internal-response district volume: spoil disposal volume=10:1.Start sludge pump 8.1, pump into the fresh sludge of equivalent in anaerobically fermenting integration apparatus 1 internal-response district, the fermented sludge of discharging inserts outside settling region, sanitary sewage is delivered to outside settling region from dilution water tank 6 and is diluted by startup dilution pumps 6.1, diluent gravity flow enters medium sediment pool 3, starts medicament of phosphate pump 10.1 by the NaHPO of 1mol/L simultaneously
4be connected with medium sediment pool by medicament of phosphate pump 10.1 from medicament of phosphate case 10, start magnesium salts compound pump 11.1 by 1mol/LMgCl
2be connected with medium sediment pool by magnesium salts compound pump 11.1 from magnesium salts chemical tank 11, make MgCl
2, NH
4-N and PO
4 3-in pipe core, form struvite precipitation, and reclaim bottom medium sediment pool.Medium sediment pool produces water gravity flow and enters product water tank 7, produces water tank 7 and is connected with A-A-O sludge denitrification dephosphorization system 2 by working shaft 7.1.Start the first Digestive system reflux pump 2.1, nitrification liquid being back to A-A-O has anoxic section first lattice, and its reflux ratio is 100%.Start the second nitrification liquid reflux pump 2.2, nitrification liquid is back to the outside settling region of anaerobically fermenting integration apparatus 1, its reflux ratio is 250%.Start the first sludge reflux pump 4.1, by sludge reflux to A-A-O sludge denitrification dephosphorization system, its anaerobism section reflux ratio is 80%.Start the second mud tap aspirator 4.2, by sludge reflux to sludge box 8, its reflux ratio is 20%, and by sludge pump 8.1, mud is pumped into anaerobically fermenting integration apparatus 1 internal-response district.Start the first fermented sludge pump 5.1 outside settling region fermented sludge is back to fermented sludge case 5 through the second fermented sludge reflux pump 5.2, fermented sludge is back to integration apparatus internal-response district again.
After anaerobically fermenting integration apparatus 1 ferments, sludge fermentation liquid water quality is as follows: SCOD=3000-3500mg/L, TVFA=1000-1500mgSCOD/L, NH
4-N=200-250mg/L, PO
4 3-=50-55mg/L.
Whole system runs the water outlet of 30 days anaerobically fermenting integration apparatus 1 and adds NaHPO
4, MgCl
2, its effluent quality: SCOD=250-300mg/L, NH
4-N=55-60mg/L, PO
4 3-=5-7mg/L, NO
2-N=0-0.5mg/L, NO
3-N=0.1-0.5mg/L.
A-A-O sludge denitrification dephosphorization system 2 effluent quality: SCOD=30-40mg/L, NH
4-N=0.1-1mg/L, NO
3-N=5-10mg/L, NO
2-N=0-0.5mg/L, PO
4 3-=0.1-0.5mg/L.
Claims (2)
1. the device of excess sludge alkaline fermentation exploitation internal carbon source coupling A-A-O denitrification dephosphorization system, its feature is as follows:
Device comprises: anaerobically fermenting integration apparatus (1), A-A-O sludge denitrification dephosphorization system (2), medium sediment pool (3), second pond (4), fermented sludge case (5), dilution water tank (6), produce water tank (7), sludge box (8), alkaline agent case (9), medicament of phosphate case (10), magnesium salts chemical tank (11), fermentation equipment agitator (12), A-A-O system stirrer (13), one pH determinator (14), ORP determinator (15), one DO determinator (16), 2nd pH determinator (17), first gas meter (18), second gas meter (19), first aerating apparatus (20), second aerating apparatus (21), 2nd DO determinator (22), first nitrification liquid reflux pump (2.1), second Digestive system reflux pump (2.2), first sludge reflux pump (4.1), second sludge reflux pump (4.2), first fermented sludge pump (5.1), second fermented sludge pump (5.2), dilution pumps (6.1), working shaft (7.1), sludge pump (8.1), alkaline agent pump (9.1), medicament of phosphate pump (10.1), magnesium salts compound pump (11.1),
Described anaerobically fermenting integration apparatus (1) is by distortion SBR and settling tank clustered aggregates, and it is internal-response district that SBR is arranged on inner, and it is outside settling region that settling tank is arranged on outside; First aerating apparatus (20) is set, fermentation equipment agitator (12), a pH determinator (14), ORP determinator (15), a DO determinator (16) in internal-response district; In outside settling region, the 2nd pH determinator (17) is set; Wherein fermented sludge case (5) is connected with anaerobically fermenting integration apparatus (1) outside settling region by the first sludge reflux pump (5.1), and fermented sludge case (5) is connected with anaerobically fermenting integration apparatus (1) internal-response district by the second sludge reflux pump (5.2); Dilution water tank (6) is connected with anaerobically fermenting integration apparatus (1) outside settling region by dilution pumps (6.1); Sludge box (8) is connected with anaerobically fermenting integration apparatus (1) internal-response district by sludge pump (8.1), and sludge box (8) is connected with second pond (4) by the second sludge pump (4.2); Alkaline agent case (9) is connected with anaerobically fermenting integration apparatus (1) internal-response district by alkaline agent pump (9.1); Anaerobically fermenting integration apparatus (1) outside settling region water outlet is connected from flowing into medium sediment pool (3); Medicament of phosphate case (10) is connected with medium sediment pool (3) by medicament of phosphate pump (10.1); Magnesium salts chemical tank (11) is connected with medium sediment pool (3) by magnesium salts compound pump (11.1); Medium sediment pool (3) is connected with product water tank (7) by pipeline; Produce water tank (7) to be connected with A-A-O sludge denitrification dephosphorization system (2) by working shaft (7.1); Anaerobically fermenting integration apparatus (1) outside settling region arranges the first water outlet (1.1), the second water outlet (1.3), the 3rd water outlet (1.4); Anaerobically fermenting integration apparatus (1) internal-response district sets out the mouth of a river (1.2);
Described A-A-O sludge denitrification dephosphorization system (2) is divided into 3 parts, and the first lattice are anaerobism section, and the second lattice, the 3rd lattice, the 4th lattice are anoxic section, and the 5th lattice, the 6th lattice, the 7th lattice, the 8th lattice are aerobic section; First lattice, arrange A-A-O system stirrer (13) in the second lattice, the 3rd lattice, the 4th lattice, arrange the 2nd DO determinator (22) in the 5th lattice, and arrange filler in the 5th lattice, the 6th lattice, the 7th lattice, the 8th lattice, filler ratio is 40%; Wherein the 8th lattice are connected with A-A-O sludge denitrification dephosphorization system (2) second lattice by the first nitrification liquid reflux pump (2.1), and the 8th lattice are connected with anaerobically fermenting integration apparatus (1) outside settling region by the second nitrification liquid reflux pump (2.2); 8th lattice water outlet is connected with second pond (4); Second pond (4) is connected with A-A-O sludge denitrification dephosphorization system (2) first lattice by the first sludge reflux pump (4.1), and second pond (4) is connected with sludge box (8) by the second sludge reflux pump (4.2).
2. application rights requires the method for excess sludge alkaline fermentation exploitation internal carbon source coupling A-A-O denitrification dephosphorization system described in 1, and its feature is as follows, comprises the following steps:
1) getting SBR pilot scale mud is sludge fermentation device and A-A-O sludge denitrification dephosphorization system (2) primary starting mud, first cleans SBR pilot scale mud, to remove inorganic particle in mud, SCOD, NH
4-N, NO
3-N material; Cleaning secondary fermentation apparatus sewage sludge concentration MLSS=9000-10000mg/L, SCOD=30-40mg/L, temperature of reactor is 20-30 DEG C, pH=9-10; A-A-O sludge denitrification dephosphorization system (2) sludge concentration MLSS=2000-3000mg/L, SCOD=30-40mg/L, temperature of reactor is that 20-30 DEG C, pH=6.5-7.5, A-A-O system anaerobism section, anoxic section and aerobic segment body amass ratio, i.e. V
detest: V
lack: V
good=1.5:4.5:4, the C/N mass ratio in Controlling System, i.e. C/N=4-5, aerobic section DO=2-3mg/L;
2) store in sludge box (8) for fermentation unit mud; Preparation 1mol/L-2mol/LNaOH solution is in alkaline agent case (9), starting sludge pump (8.1) squeezes in anaerobically fermenting integration apparatus (1) reaction zone by the excess sludge in sludge box (8), start alkali pump (9.1) pumps in anaerobically fermenting integration apparatus reaction zone simultaneously by NaOH solution, start fermentation equipment agitator (12) to stir with the speed of 30rmp/min, alkali lye is mixed with mud, carries out SCOD, TVFA, NH simultaneously
4-N, PO
4 3-index determining, when ferment 7-9 days time reactor in SCOD=3000-3500mg/L, TVFA=1000-1500mgSCOD/L, NH
4-N=200-250mg/L, PO
4 3-=50-55mg/L and maintain 5-6 days, sludge age SRT=5-10 days in reactor, regularly from mud discharging mouth (1.2) spoil disposal, anaerobically fermenting integration apparatus (1) spoil disposal is than for 10:1 and internal-response district volume: spoil disposal volume=10:1; Start sludge pump (8.1), pump into the fresh sludge of equivalent in anaerobically fermenting integration apparatus (1) internal-response district, the fermented sludge of discharging inserts outside settling region, sanitary sewage is delivered to outside settling region from dilution water tank (6) and is diluted by startup dilution pumps (6.1), diluent gravity flow enters medium sediment pool (3), starts medicament of phosphate pump (10.1) by the NaHPO of 1mol/L simultaneously
4be connected with medium sediment pool by medicament of phosphate pump (10.1) from medicament of phosphate case (10), start magnesium salts compound pump (11.1) by 1mol/LMgCl
2be connected with medium sediment pool by magnesium salts compound pump (11.1) from magnesium salts chemical tank (11), make MgCl
2, NH
4-N and PO
4 3-in pipe core, form struvite precipitation, and reclaim bottom medium sediment pool; Medium sediment pool produces water and produces water tank (7) from flowing into, and produces water tank (7) and is connected with A-A-O sludge denitrification dephosphorization system (2) by working shaft (7.1); Start the first Digestive system reflux pump (2.1), nitrification liquid being back to A-A-O has anoxic section first lattice, and its reflux ratio is 100%; Start the second nitrification liquid reflux pump (2.2), nitrification liquid is back to anaerobically fermenting integration apparatus (1) outside settling region, its reflux ratio is 250%; Start the first sludge reflux pump (4.1), by sludge reflux to A-A-O sludge denitrification dephosphorization system, its anaerobism section reflux ratio is 80%; Start the second mud tap aspirator (4.2), by sludge reflux to sludge box (8), its reflux ratio is 20%, and by sludge pump (8.1), mud is pumped into anaerobically fermenting integration apparatus (1) internal-response district; Start the first fermented sludge pump (5.1) outside settling region fermented sludge to be back to fermented sludge case (5) and through the second fermented sludge reflux pump (5.2), fermented sludge to be back to integration apparatus internal-response district again.
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