CN102583927A - Sludge micro oxygen hydrolytic acidizing method - Google Patents
Sludge micro oxygen hydrolytic acidizing method Download PDFInfo
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- CN102583927A CN102583927A CN2012100719400A CN201210071940A CN102583927A CN 102583927 A CN102583927 A CN 102583927A CN 2012100719400 A CN2012100719400 A CN 2012100719400A CN 201210071940 A CN201210071940 A CN 201210071940A CN 102583927 A CN102583927 A CN 102583927A
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Abstract
The invention relates to a sludge micro oxygen hydrolytic acidizing method, which includes: inoculating sludge containing acid-producing bacteria in a hydrolytic acidizing reactor, intermittently inputting air to the middle of the hydrolytic acidizing reactor for air stirring, simultaneously supplementing intermittent mechanical stirring, performing hydrolytic acidizing on sludge of a sewage treatment plant under micro oxygen conditions with dissolved oxygen (DO) kept to be 0.4-0.8 mg/L, leading the sludge after hydrolytic acidizing treatment to enter a settling pond for sludge-water separation, and leading liquid supernatant to serve as carbon sources for municipal sewage biological de-nitrification and dephosphorization treatment. The sludge micro oxygen hydrolytic acidizing method is conducted at normal temperature, is not needed to be added with acid and alkali for adjusting potential of hydrogen (pH) value, is simple in operation, stable in running and capable of restraining growth of methane bacteria and improving stability of a sludge hydrolytic acidizing system, and simultaneously leads sludge to obtain reduction and stabilization treatment to the maximum extent. Sludge acid yield is improved by 38%-50%.
Description
Technical field
The invention belongs to sludge treatment and application technology as the second resource field, relate to a kind of treatment process of sludge of sewage treatment plant, particularly relate to a kind of little oxygen hydrolysis acidation treatment method of sludge of sewage treatment plant.
Background technology
Sludge of sewage treatment plant is hydrolysed ferment under anaerobic, can produce short chain volatile acid such as acetate, propionic acid, butyric acid.With the carbon source of mud acid fermentation product, can reduce cost of sewage disposal, and can make sewage plant sludge minimizing and resource utilization as denitrifying bacteria, polyP bacteria.
Since the eighties in 20th century; External acidication stage research to anaerobic digestion is more and more; Wherein be to utilize the preliminary sedimentation tank sludge hydrolytic of sewage work to ferment to produce voltaile fatty acid (VFA) mostly, also have and adopt the mixing sludge of primary sludge and excess sludge to study.And it is domestic very rarely seen to the sour research of mud product.More existing researchs show: the acid-producing bacteria ph optimum is 6.0～7.0; And this scope has with the ph optimum 6.5～7.5 of methanobacteria and conflicts; Thereby in the sludge hydrolytic acidification reactor, can produce the methanation phenomenon inevitably, make system's fluctuation of service, and the product of mud acid amount is low.
ZL 200810054486.1 provides a kind of preparation method who handles the carbon source of waste water, and in this patent, biochemical reaction is 5.5～6.5 in the pH in acid fermentation stage value in the acid fermentation reactor drum, and the controlled temperature of acid fermentation reactor drum is 26 ℃～38 ℃.This patent requires that the heating unit controlled temperature is arranged, and adds acid control pH, and production cost is high, and mud product acid amount is low.
Hu Yinghua etc. [energy environment protection, 2005,19 (1): 28～31] have carried out the pilot scale research of the little oxygen digestion of sewage plant excess sludge; In its reactor drum, a part of mud has been in oxygen condition, and a part of mud is in anoxic condition; Under aerobic state; Amphimicrobe utilizes oxygen as the electron acceptor(EA) degradation of organic substances, replaces oxygen as electron donor by part nitrate salt in that anoxia condition is next, reaches the purpose of degraded microbe body through the endogenous nitrate respiration.The digestion time of this research is 20 days, but does not see the accumulation that the high density volatile acid is arranged.
Open congruence [Shanghai environmental science, 1995,14 (11): 15～16] and carried out the research that the little oxygen of excess sludge is cleared up technology, the minimizing of mud is effective, but because of only adopting pneumatic blending, mud to be prone to be deposited on the bottom, does not also see the accumulation that the high density volatile acid is arranged.
Summary of the invention
The purpose of this invention is to provide a kind of little oxygen hydrolysis acidification mud method,, can improve the stability of sludge hydrolytic acidification system, significantly improve mud and produce the acid amount with this method treatment plant's mud of disposing of sewage.
Little oxygen hydrolysis acidification mud method of the present invention is the mud that inoculation contains acid-producing bacteria in reactor for hydrolysis and acidification; Carry out pneumatic blending to reactor for hydrolysis and acidification discontinuous bubbling air; And auxiliary simultaneously intermittent type mechanical stirring; Keep dissolved oxygen DO be under little oxygen condition of 0.4～0.8mg/L to the sludge of sewage treatment plant acidifying that is hydrolyzed, the mud after acidication is handled gets into the settling tank mud-water separation, the carbon source that supernatant is handled as the municipal effluent biological carbon and phosphorous removal.
Among the present invention, pneumatic blending and mechanical stirring are carried out simultaneously, and every interval 40～60min stirs once, each churning time 5～10min.
Wherein, the preferred 10～15W/m of mechanical stirring intensity
3Preferred 0.06～the 0.14m of the air capacity of pneumatic blending
3/ m
3The pond holds min.
Little oxygen hydrolysis acidification mud method of the present invention is the acidifying that under 20 ℃～25 ℃ conditions, is hydrolyzed, during pH value in the reactor for hydrolysis and acidification maintain 6.0～7.0.
The preferred reactor for hydrolysis and acidification of the present invention is a sequencing batch reactor.
The little oxygen hydrolysis acidification of the present invention mud method specifically comprises following process step:
1, the cultivation of acid-producing bacteria domestication
Inoculation accounts for sewage work's aerobic sludge of reactor volume 50%～70% in reactor for hydrolysis and acidification; And add carbohydrate organic waste water as substratum; Carry out mechanical stirring and pneumatic blending, the two carries out simultaneously, and every interval 40～60min stirs once; Each churning time 5～10min, mechanical stirring intensity 10～15W/m
3, pneumatic blending air capacity 0.06～0.14m
3/ m
3The pond holds min, and dissolved oxygen DO is little oxygen condition of 0.4～0.8mg/L in the reactor for hydrolysis and acidification to keep; Spoil disposal not in cultivating the domestication process, an intermittently discharged supernatant mends isopyknic carbohydrate organic waste water as substratum after discharging supernatant again, stops to stir deposition 0.5-1h, cyclical operation before row's supernatant; The COD concentration and the volume that add carbohydrate organic waste water every day are confirmed organic loading rate 3～4gCOD/Ld, hydraulic detention time 3～4d by organic loading rate and hydraulic detention time; Treat in the reactor for hydrolysis and acidification that volatile acid concentration reaches 3000mg/L when above, accomplishes the cultivation of acid-producing bacteria and tames;
2, the acidication of sludge of sewage treatment plant
With VS (volatile solid concentration) is 15～25g/L; VS/TS (volatile solid concentration/total solid concentration) ratio, gets into step 1 and has cultivated in the reactor drum of having tamed acid-producing bacteria as getting into mud greater than 0.5 sludge of sewage treatment plant, carries out mechanical stirring and pneumatic blending; The two carries out simultaneously; Every interval 40～60min stirs once, each churning time 5～10min, mechanical stirring intensity 10～15W/m
3, pneumatic blending air capacity 0.06～0.14m
3/ m
3The pond holds min; Discharge behind the solid retention time of the satisfied 3～6d of mud in the entering reactor drum, will stir 5～10min before the spoil disposal every day, discharges the muddy water mixed solution that is rich in volatile acid, mends isopyknic new sludge of sewage treatment plant, cyclical operation simultaneously again;
The acidifying that under 20 ℃～25 ℃, is hydrolyzed of above-mentioned reactor drum, behind the reactor start-up, pH value leans on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 6.0～7.0 naturally in the reactor drum, does not need to add acid-alkali accommodation again;
3, the mud-water separation of mud behind the acidication
The muddy water mixed solution that is rich in volatile acid that step 2 is discharged gets into settling tank and carries out mud-water separation, and the settling tank supernatant reclaims the carbon source as the municipal effluent biological denitrification phosphorous removal technique, and sedimentary waste sludge directly discharges.
Wherein, to get into the hydraulic detention time that settling tank carries out mud-water separation be 1～2h to muddy water mixed solution.
The invention provides a kind of method of little oxygen hydrolysis acidification mud; With this method treatment plant's mud of disposing of sewage; Can suppress the growth of methanobacteria; The stability and the mud that improve sludge hydrolytic acidification system produce the acid amount, make mud at utmost obtain minimizing and stabilization treatment simultaneously, and the advantage of this method is mainly reflected in the following aspects:
1, little oxygen hydrolysis acidization treatment plant's mud of disposing of sewage is simple to operate, in reactor drum, adopts pneumatic blending and mechanical stirring, and two kinds of alr modes carry out simultaneously; Every interval 40～60min stirs once; Such alr mode has improved the settling ratio of mud, has prolonged the time of mud hybrid reaction, the more important thing is the growth that has suppressed methanobacteria; Improve the output of mud volatile acid, increased the stability of system's operation.
2, little oxygen hydrolysis acidization can be operated at normal temperatures, need not heat with airtight, does not need to add in addition the pH value of acid-alkali accommodation reactor drum, and operational condition is simplified.
3, sludge of sewage treatment plant belongs to the solid waste of sewage work; Little oxygen hydrolysis acidization treatment plant's mud of disposing of sewage is simple to operate; Its tunning acetate, propionic acid, butyric acid can be used as the carbon source of bio-denitrifying sewage dephosphorization process denitrifying bacteria, polyP bacteria; Reduce the cost of WWT, realize the recycling of mud simultaneously.
4, adopt little oxygen hydrolysis acidization treatment of high concentration suspended solids mud; Not only can obtain ideal volatile acid output; And can realize good VS removal effect, mud produces acid amount 0.11～0.19gVFA/gVS, VS clearance 35%～44%; System is stable, and sludge reduction and stabilization effect are good.
5, the mud acid fermentation method of the semicontinuous operation reactor drum of the inventive method and employing compares, and is stable, produces sour amount and can improve 38%～50%, and concrete comparative data is seen table 1.
Embodiment
Embodiment 1
Reactor for hydrolysis and acidification adopts sequencing batch reactor, and WWT plant aeration tank returned sluge is seeded in the sequencing batch reactor, and the seed sludge amount is 60% of a reactor volume.After the inoculation, add carbohydrate organic waste water as substratum, in sequencing batch reactor, carry out mechanical stirring and pneumatic blending under the normal temperature, the two carries out simultaneously, and every interval 60min stirs once, each churning time 5min, mechanical stirring intensity 10W/m
3, the air capacity 0.06m of pneumatic blending
3/ m
3The pond holds min, and dissolved oxygen DO is little oxygen condition of 0.4mg/L in the reactor drum to keep.The cultivation of acid-producing bacteria domestication generally needs 7～14 days, spoil disposal not in the culturing process, every day stop to stir and staticly settle 1h after discharge supernatant, restock gets into isopyknic carbohydrate organic waste water, above cyclical operation simultaneously.The COD concentration and the volume that add carbohydrate organic waste water every day confirm that by organic loading rate and hydraulic detention time the organic loading rate adopts 3gCOD/Ld, hydraulic detention time 3d.Treat that volatile acid concentration reaches more than the 3000mg/L in the reactor for hydrolysis and acidification, the cultivation domestication of acid-producing bacteria finishes.
After treating that acid-producing bacteria is cultivated domestication well; With the entering mud of sludge of sewage treatment plant as the sequencing batch reactor that contains the good acid-producing bacteria of above-mentioned cultivation domestication; Adopt semicontinuous operation scheme; Every day mud after the processing of the instantaneous discharge certain volume in the middle part of sequencing batch reactor mud mixture, and get into isopyknic sludge of sewage treatment plant from the top of reactor drum.To stir 5min in advance before each spoil disposal.Every day, the sludge quantity of instantaneous entering reactor drum was controlled by solid retention time, and solid retention time representes that with SRT the sequencing batch reactor volume is V, the m of unit
3, the sludge quantity that adds every day is V
1, the m of unit
3, V=SRT * V
1Present embodiment control gets into the VS 15g/L of mud; VS/TS=0.51; SRT 6d, the alr mode during the sludge hydrolytic acidifying is cultivated the alr mode in domestication stage, 20 ℃ of temperature with above-mentioned acid-producing bacteria; PH value in the reactor drum relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to maintain 6.5 naturally, does not need to regulate in addition control.
Get into settling tank behind the mud mixture of discharging, deposition 1h, settling tank supernatant are as the carbon source recycle of municipal effluent biological denitrification phosphorous removal technique, and the waste sludge that precipitates discharges.
Embodiment 2
Mixing chamber interval 60min, churning time 7min, SRT 4d, other is with embodiment 1.
Embodiment 3
Mixing chamber interval 40min, churning time 5min, the VS 20g/L of entering mud, VS/TS=0.55, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to maintain 6.0 naturally in the SRT 3d, reactor drum, and other is with embodiment 1.
Volatile acid concentration 2693mg/L in the muddy water mixed solution after acidication is handled, mud produce acid amount 0.14gVFA/gVS, VS clearance 35%.
Embodiment 4
Mixing chamber interval 40min, churning time 10min, the VS 20g/L of entering mud, SRT 4d, other is with embodiment 3.
Volatile acid concentration 2965mg/L in the muddy water mixed solution after acidication is handled, mud produce acid amount 0.15gVFA/gVS, VS clearance 39%.
Embodiment 5
Mixing chamber interval 50min, churning time 10min, the VS 25g/L of entering mud, SRT 3d, 23 ℃ of temperature, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to maintain 6.5 naturally in the reactor drum, and other is with embodiment 3.
Embodiment 6
Mixing chamber interval 40min, churning time 10min, the VS 25g/L of entering mud, SRT 4d, 25 ℃ of temperature, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to maintain 7.0 naturally in the reactor drum, and other is with embodiment 1.
Embodiment 7
Reactor for hydrolysis and acidification adopts sequencing batch reactor, and the aerobic sludge of sewage work is seeded in the sequencing batch reactor, and the seed sludge amount is 70% of a reactor volume.After the inoculation, add carbohydrate organic waste water as substratum, in sequencing batch reactor, carry out mechanical stirring and pneumatic blending under the normal temperature, the two carries out simultaneously, and every interval 60min stirs once, each churning time 7min, mechanical stirring intensity 12W/m
3, the air capacity 0.11m of pneumatic blending
3/ m
3The pond holds min, and dissolved oxygen DO is little oxygen condition of 0.6mg/L in the reactor drum to keep.The cultivation of acid-producing bacteria domestication generally needs 7～14 days, spoil disposal not in the culturing process, every day stop to stir and staticly settle 0.5h after discharge supernatant, restock gets into isopyknic carbohydrate organic waste water, above cyclical operation simultaneously.The COD concentration and the volume that add carbohydrate organic waste water every day confirm that by organic loading rate and hydraulic detention time the organic loading rate adopts 3gCOD/Ld, hydraulic detention time 4d.Treat that volatile acid concentration reaches more than the 3000mg/L in the reactor for hydrolysis and acidification, the cultivation domestication of acid-producing bacteria finishes.
After treating that acid-producing bacteria is cultivated domestication well; With the entering mud of sludge of sewage treatment plant as the sequencing batch reactor that contains the good acid-producing bacteria of above-mentioned cultivation domestication; Adopt semicontinuous operation scheme, every day instantaneous discharge certain volume processing after mud mud mixture and get into isopyknic sludge of sewage treatment plant.To stir 8min in advance before each spoil disposal.Control gets into the VS 15g/L of mud; VS/TS=0.6; SRT 6d, the alr mode during the sludge hydrolytic acidifying is cultivated the alr mode in domestication stage, 23 ℃ of temperature with above-mentioned acid-producing bacteria; PH value in the reactor drum relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to maintain 6.5 naturally, does not need to regulate in addition control.
Get into settling tank behind the mud mixture of discharging, deposition 1.5h, settling tank supernatant are as the carbon source recycle of municipal effluent biological denitrification phosphorous removal technique, and the waste sludge that precipitates discharges.
Embodiment 8
Churning time 5min, SRT 4d, other is with embodiment 7.
Embodiment 9
Mixing chamber interval 50min, SRT 3d, 20 ℃ of temperature, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 6.38 naturally in the reactor drum, and other is with embodiment 7.
Volatile acid concentration 2425mg/L in the muddy water mixed solution after acidication is handled, mud produce acid amount 0.16gVFA/gVS, VS clearance 38%.
Embodiment 10
Mixing chamber interval 60min, churning time 10min, the VS 20g/L of entering mud, SRT 4d, other is with embodiment 9.
Embodiment 11
Mixing chamber interval 40min, churning time 5min, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 6.42 naturally in the SRT 6d, reactor drum, and other is with embodiment 10.
Volatile acid concentration 3665mg/L in the muddy water mixed solution after acidication is handled, mud produce acid amount 0.18gVFA/gVS, VS clearance 36%.
Embodiment 12
Mixing chamber interval 50min, 25 ℃ of temperature, the VS 25g/L of entering mud, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 6.46 naturally in the reactor drum, and other is with embodiment 7.
Volatile acid concentration 4618mg/L in the muddy water mixed solution after acidication is handled, mud produce acid amount 0.19gVFA/gVS, VS clearance 36%.
Embodiment 13
Get into the VS 20g/L of mud, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 6.91 naturally in the SRT 4d, reactor drum, and other is with embodiment 12.
Volatile acid concentration 3391mg/L in the muddy water mixed solution after acidication is handled, mud produce acid amount 0.17gVFA/gVS, VS clearance 38%.
Embodiment 14
Reactor for hydrolysis and acidification adopts sequencing batch reactor, the aerobic sludge of sewage work is inserted in the sequencing batch reactor inoculate, and the seed sludge amount is 70% of a reactor volume.After the inoculation, add carbohydrate organic waste water as substratum, in sequencing batch reactor, carry out mechanical stirring and pneumatic blending under the normal temperature, the two carries out simultaneously, and every interval 60min stirs once, each churning time 10min, mechanical stirring intensity 15W/m
3, the air capacity 0.14m of pneumatic blending
3/ m
3The pond holds min, and dissolved oxygen DO is little oxygen condition of 0.8mg/L in the reactor drum to keep.The cultivation of acid-producing bacteria domestication generally needs 7～14 days, spoil disposal not in the culturing process, every day stop to stir and staticly settle 1h after discharge supernatant, restock gets into isopyknic carbohydrate organic waste water, above cyclical operation simultaneously.The COD concentration and the volume that add carbohydrate organic waste water every day confirm that by organic loading rate and hydraulic detention time the organic loading rate adopts 4gCOD/Ld, hydraulic detention time 3d.Treat that volatile acid concentration reaches more than the 3000mg/L in the reactor for hydrolysis and acidification, the cultivation domestication of acid-producing bacteria finishes.
After treating that acid-producing bacteria is cultivated domestication well; With the entering mud of sludge of sewage treatment plant as the sequencing batch reactor that contains the good acid-producing bacteria of above-mentioned cultivation domestication; Adopt semicontinuous operation scheme, every day instantaneous discharge certain volume processing after mud mud mixture and get into isopyknic sludge of sewage treatment plant.To stir 10min in advance before each spoil disposal.Control gets into the VS 15g/L of mud; VS/TS=0.7; SRT 6d, the alr mode during the sludge hydrolytic acidifying is cultivated the alr mode in domestication stage, 20 ℃ of temperature with above-mentioned acid-producing bacteria; PH value in the reactor drum relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to maintain 6.0 naturally, does not need to regulate in addition control.
Get into settling tank behind the mud mixture of discharging, deposition 2h, settling tank supernatant are as the carbon source recycle of municipal effluent biological denitrification phosphorous removal technique, and the waste sludge that precipitates discharges.
Embodiment 15
Churning time 7min, SRT 4d, other is with embodiment 14.
Embodiment 16
Churning time 5min, SRT 3d, other is with embodiment 14.
Embodiment 17
Mixing chamber interval 50min, churning time 7min, the VS 20g/L of entering mud, SRT 4d, 23 ℃ of temperature, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 6.5 naturally in the reactor drum, and other is with embodiment 14.
Embodiment 18
Mixing chamber interval 40min, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 6.94 naturally in the SRT 3d, reactor drum, 25 ℃ of temperature, other is with embodiment 17.
Volatile acid concentration 3861mg/L in the muddy water mixed solution after acidication is handled, mud produce acid amount 0.19gVFA/gVS, VS clearance 35%.
Embodiment 19
Mixing chamber interval 50min, churning time 5min, the VS 25g/L of entering mud, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 6.5 naturally in the SRT 4d, reactor drum, and other is with embodiment 18.
Embodiment 20
Mixing chamber interval 60min, the pH value relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to be maintained 7.0 naturally in the churning time 5min, reactor drum, and other is with embodiment 18.
Embodiment 21
Reactor for hydrolysis and acidification adopts sequencing batch reactor, WWT plant aeration tank returned sluge is inserted in the sequencing batch reactor inoculate, and the seed sludge amount is 50% of a reactor volume.After the inoculation, add carbohydrate organic waste water as substratum, in sequencing batch reactor, carry out mechanical stirring and pneumatic blending under the normal temperature, the two carries out simultaneously, and every interval 60min stirs once, each churning time 5min, mechanical stirring intensity 15W/m
3, the air capacity 0.14m of pneumatic blending
3/ m
3The pond holds min, and dissolved oxygen DO is little oxygen condition of 0.8mg/L in the reactor drum to keep.The cultivation of acid-producing bacteria domestication generally needs 7～14 days, spoil disposal not in the culturing process, every day stop to stir and staticly settle 0.5h after discharge supernatant, restock gets into isopyknic carbohydrate organic waste water, above cyclical operation simultaneously.The COD concentration and the volume that add carbohydrate organic waste water every day confirm that by organic loading rate and hydraulic detention time the organic loading rate adopts 4gCOD/Ld, hydraulic detention time 4d.Treat that volatile acid concentration reaches more than the 3000mg/L in the reactor for hydrolysis and acidification, the cultivation domestication of acid-producing bacteria finishes.
After treating that acid-producing bacteria is cultivated domestication well; With the entering mud of sludge of sewage treatment plant as the sequencing batch reactor that contains the good acid-producing bacteria of above-mentioned cultivation domestication; Adopt semicontinuous operation scheme, every day instantaneous discharge certain volume processing after mud mud mixture and get into isopyknic sludge of sewage treatment plant.To stir 10min in advance before each spoil disposal.Control gets into the VS 15g/L of mud; VS/TS=0.65; SRT 6d, the alr mode during the sludge hydrolytic acidifying is cultivated the alr mode in domestication stage, 20 ℃ of temperature with above-mentioned acid-producing bacteria; PH value in the reactor drum relies on the volatile acid and the basicity of interior acid-producing bacteria of reactor drum and generation thereof to maintain 6.5 naturally, does not need to regulate in addition control.
Get into settling tank behind the mud mixture of discharging, deposition 2h, settling tank supernatant are as the carbon source recycle of municipal effluent biological denitrification phosphorous removal technique, and the waste sludge that precipitates discharges.
Claims (9)
1. little oxygen hydrolysis acidification mud method; Be the mud that inoculation contains acid-producing bacteria in reactor for hydrolysis and acidification; Carrying out pneumatic blending to reactor for hydrolysis and acidification discontinuous bubbling air, and auxiliary simultaneously intermittent type mechanical stirring, is to the sludge of sewage treatment plant acidifying that is hydrolyzed under little oxygen condition of 0.4～0.8mg/L keeping dissolved oxygen DO; Mud after acidication is handled gets into the settling tank mud-water separation, the carbon source that supernatant is handled as the municipal effluent biological carbon and phosphorous removal.
2. little oxygen hydrolysis acidification mud method according to claim 1 is characterized in that described pneumatic blending and mechanical stirring carry out simultaneously, and every interval 40～60min stirs once, each churning time 5～10min.
3. little oxygen hydrolysis acidification mud method according to claim 1 and 2 is characterized in that said churned mechanically intensity is 10～15W/m
3
4. little oxygen hydrolysis acidification mud method according to claim 1 and 2, the air capacity that it is characterized in that said pneumatic blending is 0.06～0.14m
3/ m
3The pond holds min.
5. little oxygen hydrolysis acidification mud method according to claim 1 is characterized in that it is 20 ℃～25 ℃ that said acidication is handled the temperature of mud.
6. little oxygen hydrolysis acidification mud method according to claim 1 and 2 is characterized in that described reactor for hydrolysis and acidification is a sequencing batch reactor.
7. little oxygen hydrolysis acidification mud method may further comprise the steps:
A), in reactor for hydrolysis and acidification, inoculate the sewage work's aerobic sludge that accounts for reactor volume 50%～70%; And add carbohydrate organic waste water as substratum; Carry out mechanical stirring and pneumatic blending, the two carries out simultaneously, and every interval 40～60min stirs once; Each churning time 5～10min, mechanical stirring intensity 10～15W/m
3, pneumatic blending air capacity 0.06～0.14m
3/ m
3The pond holds min, and dissolved oxygen DO is little oxygen condition of 0.4～0.8mg/L in the reactor for hydrolysis and acidification to keep; Spoil disposal not in cultivating the domestication process, an intermittently discharged supernatant mends isopyknic carbohydrate organic waste water after discharging supernatant again, stops to stir deposition 0.5-1h, cyclical operation before row's supernatant; The COD concentration and the volume that add carbohydrate organic waste water every day are confirmed organic loading rate 3～4gCOD/Ld, hydraulic detention time 3～4d by organic loading rate and hydraulic detention time; Treat in the reactor for hydrolysis and acidification that volatile acid concentration reaches 3000mg/L when above, accomplishes the cultivation of acid-producing bacteria and tames;
B), with volatile solid concentration 15～25g/L; Volatile solid concentration/total solid concentration ratio, gets into step a) and has cultivated in the reactor drum of having tamed acid-producing bacteria as getting into mud greater than 0.5 sludge of sewage treatment plant, carries out mechanical stirring and pneumatic blending; The two carries out simultaneously; Every interval 40～60min stirs once, each churning time 5～10min, mechanical stirring intensity 10～15W/m
3, pneumatic blending air capacity 0.06～0.14m
3/ m
3The pond holds min; Discharge behind the solid retention time of the satisfied 3～6d of mud in the entering reactor drum, will stir 5～10min before the spoil disposal every day, discharges the muddy water mixed solution that is rich in volatile acid, mends isopyknic new sludge of sewage treatment plant, cyclical operation simultaneously again;
C), the step b) muddy water mixed solution that is rich in volatile acid of discharging gets into settling tank and carries out mud-water separation, the settling tank supernatant reclaims the carbon source as the municipal effluent biological denitrification phosphorous removal technique, sedimentary waste sludge directly discharges.
8. little oxygen hydrolysis acidification mud method according to claim 7 is characterized in that the acidifying that under 20 ℃～25 ℃, is hydrolyzed of said reactor for hydrolysis and acidification.
9. little oxygen hydrolysis acidification mud method according to claim 7 is characterized in that the hydraulic detention time that said muddy water mixed solution entering settling tank carries out mud-water separation is 1～2h.
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| CN108046554A (en) * | 2017-12-14 | 2018-05-18 | 北京工业大学 | The method that one Yeasts strengthen the micro- oxygen digestion production volatile fatty acid of residual active sludge room temperature |
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| CN109231445A (en) * | 2018-10-10 | 2019-01-18 | 常州方圆制药有限公司 | A kind of preprocess method improving Etimicin Sulfate synthetic wastewater Anaerobic Treatment efficiency |
| CN109534606A (en) * | 2018-12-21 | 2019-03-29 | 上海同济建设科技股份有限公司 | A kind of fermented pharmaceutical waste water treatment process |
| CN110467323A (en) * | 2019-09-17 | 2019-11-19 | 昆明理工大学 | A kind of method of high temperature micro- oxygen and micro-current cooperatively processing sludge quick release internal carbon source |
| CN112079437A (en) * | 2020-09-22 | 2020-12-15 | 苏州达道环保科技有限公司 | Intermittent air stirring sewage hydrolysis acidification method and reactor |
| CN114291990A (en) * | 2021-12-30 | 2022-04-08 | 南京大学 | Device for improving hydrolysis acidification effect of excess sludge with high efficiency and low consumption and operation method thereof |
| CN114455720A (en) * | 2022-01-20 | 2022-05-10 | 哈尔滨工业大学 | Method for improving biodegradability of petrochemical wastewater by using micro-aerobic hydrolysis acidification principle |
| CN114751606A (en) * | 2022-04-29 | 2022-07-15 | 天津博诺环保技术有限公司 | Multi-process combined enhanced sludge carbon source recycling method |
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| CN104310737A (en) * | 2014-10-16 | 2015-01-28 | 山东吉昌龙环境工程有限公司 | Method for realizing sludge reduction by microorganisms |
| CN106186303A (en) * | 2016-08-15 | 2016-12-07 | 桂林市福泰建材有限责任公司 | One way of life method of wastewater treatment |
| CN108046554A (en) * | 2017-12-14 | 2018-05-18 | 北京工业大学 | The method that one Yeasts strengthen the micro- oxygen digestion production volatile fatty acid of residual active sludge room temperature |
| CN108128987A (en) * | 2018-02-01 | 2018-06-08 | 成都市卓新实业有限公司 | A kind of Porta Potti sewage water treatment method and its system |
| CN109231445A (en) * | 2018-10-10 | 2019-01-18 | 常州方圆制药有限公司 | A kind of preprocess method improving Etimicin Sulfate synthetic wastewater Anaerobic Treatment efficiency |
| CN109534606A (en) * | 2018-12-21 | 2019-03-29 | 上海同济建设科技股份有限公司 | A kind of fermented pharmaceutical waste water treatment process |
| CN110467323A (en) * | 2019-09-17 | 2019-11-19 | 昆明理工大学 | A kind of method of high temperature micro- oxygen and micro-current cooperatively processing sludge quick release internal carbon source |
| CN110467323B (en) * | 2019-09-17 | 2022-03-25 | 昆明理工大学 | Method for rapidly releasing internal carbon source by cooperatively treating sludge through high-temperature micro-oxygen and micro-current |
| CN112079437A (en) * | 2020-09-22 | 2020-12-15 | 苏州达道环保科技有限公司 | Intermittent air stirring sewage hydrolysis acidification method and reactor |
| CN114291990A (en) * | 2021-12-30 | 2022-04-08 | 南京大学 | Device for improving hydrolysis acidification effect of excess sludge with high efficiency and low consumption and operation method thereof |
| CN114291990B (en) * | 2021-12-30 | 2022-12-09 | 南京大学 | Device for improving hydrolysis acidification effect of excess sludge with high efficiency and low consumption and operation method thereof |
| CN114455720A (en) * | 2022-01-20 | 2022-05-10 | 哈尔滨工业大学 | Method for improving biodegradability of petrochemical wastewater by using micro-aerobic hydrolysis acidification principle |
| CN114751606A (en) * | 2022-04-29 | 2022-07-15 | 天津博诺环保技术有限公司 | Multi-process combined enhanced sludge carbon source recycling method |
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