CN104817237A - Biological sludge zero-discharge sewage treatment plant and method - Google Patents
Biological sludge zero-discharge sewage treatment plant and method Download PDFInfo
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- CN104817237A CN104817237A CN201510246321.4A CN201510246321A CN104817237A CN 104817237 A CN104817237 A CN 104817237A CN 201510246321 A CN201510246321 A CN 201510246321A CN 104817237 A CN104817237 A CN 104817237A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
The invention provides a biological sludge zero-discharge sewage treatment plant and method embedded with an activated sludge/inorganic sand separator. The plant comprises an OSA sludge reduction main body composed of an aeration tank, a secondary sedimentation tank and an anaerobic uncoupling tank, wherein an activated sludge/inorganic sand separator is embedded in a return sludge pipeline; the bottom of the anaerobic uncoupling tank is connected with a feed port of the biological sludge/inorganic sand separator through a return sludge pipe; an overflow sludge discharge port of the biological sludge/inorganic sand separator is connected with an inlet end of the aeration tank through a return sludge pipe; and an underflow opening of the biological sludge/inorganic sand separator discharges surplus sludge through a sludge pipe. The plant and method can enhance the sludge reduction effect, and the discharged surplus sludge uses the inorganic sand instead of the activated sludge, thereby effectively implementing biological sludge zero discharge of the sewage treatment system, avoiding the secondary pollution of the activated sludge and lowering the sewage/sludge treatment cost.
Description
Technical field
The present invention relates to sewage disposal and Sludge Reduction Technologies, be specifically related to the technology that a kind of mode by embedding active sludge and inorganic sand separator from the return sludge line of sludge decrement process realizes organic-biological sludge zero discharge.
Background technology
Along with the growth of municipal effluent generation and the raising of processing rate, the quantity as sewage disposal by product excess sludge inevitably increases substantially.How economical, effectively and dispose a large amount of mud produced continually safely, become the problem that sewage treatment area need solve.Under this background, arise at the historic moment by the various mud Sources decreasing technology reduced for the purpose of sewage plant excess sludge amount, particularly based on reducing the resultant quantity of bacterial cell, the recessive growth of enhancement microbiological and utilizing the research of microfauna prey effect to achieve comparatively significant achievement.But up to now, the various Sludge Reduction Technologies developed by comparison can be found, often kind of technology all also exists shortcoming miscellaneous, wherein thorny is minimizing along with excess sludge generation, VSS/MLSS ratio in the mud of aeration tank reduces, the accumulation of inorganic substance content increases, aeration tank reaction efficiency is reduced, the sewage disposal of influential system and mud decrement effect, but also the wearing and tearing of sewage disposal device can be aggravated, affect the normal operation of sewage disposal and mud decrement system.Therefore, how to realize under the prerequisite guaranteeing sewage disposal and mud decrement effect active sludge and inorganic sand be separated be during Sludge Reduction Technologies is studied must faced by technical barrier, especially in the face of increasingly severe Second Pollution of Active Sludge, develop a kind of can realize zero discharge of biological sludge waste disposal plant and method there is prior meaning.
Summary of the invention
For the problems referred to above, the invention provides waste disposal plant and method that a kind of bypass realizing zero discharge of biological sludge embeds biological sludge and inorganic sand separator.This treatment unit adopt OSA(aerobic-precipitation-hypoxic/anaerobic) technique as mud decrement main process, simultaneously on the residual sludge reflux pipeline of main body mud decrement system, embed bypass biological sludge and inorganic sand separator.
Technical scheme of the present invention is as follows:
The waste disposal plant of the zero discharge of biological sludge of the embedding active sludge that the present invention proposes and inorganic sand separator comprises the OSA mud decrement main body be made up of aeration tank, second pond and anaerobism uncoupling pond, the alternate cycles of aerobic-anaerobism can promote catabolic activity, katabolism and anabolism are separated, realize mud decrement.In OSA mud decrement main body, raw waste water enters aeration tank by water inlet pipe, be connected by waste pipe between water side, aeration tank with second pond feed-water end, second pond discharges system water outlet by top waste pipe, is connected bottom second pond with between the feed-water end of anaerobism uncoupling pond 5 by reflux sludge tube.
Device also comprises biological sludge and inorganic sand separator, be connected by reflux sludge tube with before inorganic sand separator opening for feed with biological sludge bottom anaerobism uncoupling pond, biological sludge is connected by reflux sludge tube with aeration tank entrance end with inorganic sand separator overflow mud mouth, and biological sludge and inorganic sand separator underflow opening get rid of excess sludge by sludge pipe.
Described aeration tank is divided into pre-reaction zone and main reaction region, biological selector effect is mainly played in pre-reaction zone, active sludge is made to experience the absorption phase of a high loading in pre-reaction zone, Degradation is mainly played in main reaction region, make active sludge in the substrate degradation stage of main reaction region experience compared with underload, suppress thread fungus to breed the sludge bulking caused.
Described second pond adopts radial-flow structure, and aeration tank muddy water mixed solution out enters second pond and completes mud-water separation by precipitation operation, and standard water discharge is discharged, and second pond also can play sludge condensation effect simultaneously.
Described anaerobism uncoupling pond adopts the structure formation of top cylinder shape, lower cone shape, anaerobism uncoupling pond is by while realizing microorganism catabolizes and anabolism and being separated to carry out mud decrement, the effect of acidication can also be played, partial reflux thickened sludge from second pond is decomposed in this pond, the inorganic sand of the part of carrying in active sludge is separated, and contributes to the separating effect improving follow-up inorganic sand separator.Anaerobism uncoupling pond controls required sludge retention time by regulating water inlet position, establishes heating rod to regulate temperature in anaerobism uncoupling pond.
In aeration tank and anaerobism uncoupling pond, be equipped with agitator, muddy water mixed solution is uniformly mixed;
The present invention also proposes a kind of method utilizing said apparatus to carry out sewage disposal, and step is as follows:
(1) sewage and enter aeration tank in the lump from the active sludge of biological sludge and inorganic sand separator is allowed, hydraulic detention time controls at 4.5-5.25h, aeration tank is made up of pre-reaction zone and main reaction region two portions, biological selector effect is mainly played in pre-reaction zone, active sludge is made to experience the absorption phase of a high loading in pre-reaction zone, experience the substrate degradation stage compared with underload subsequently in main reaction region, can effectively suppress thread fungus to breed the sludge bulking caused.Mud from biological sludge and inorganic sand separator has higher activity, and the energy being conducive to promoting to realize microorganism in aeration tank recovers, inhales the removal of phosphorus denitrogenation and organic pollutant.
(2) mixed solution after the biological respinse of aeration tank enters second pond, and hydraulic detention time is about 1.7h, completes mud-water separation, go out supernatant qualified discharge, partly precipitated mud enters anaerobism uncoupling pond by reflux sludge tube by precipitation operation.
(3) aerobic microbiological obtains ATP from the oxidation of aeration tank organic substrates, when entering the anaerobic environment not having provand, just cannot generate energy, and the ATP storehouse of self can only be utilized as the energy, cannot cell synthesis be carried out in the anaerobism hungry stage.Therefore, microorganism must rebuild required energy depot before biosynthesizing, consumed substrate and carried out katabolism to meet the energy requirement of microorganism.The alternate cycles of aerobic-anaerobism effectively facilitates the catabolic activity of microorganism, namely in described anaerobism uncoupling pond, completes katabolism and is separated with anabolic, realize sludge reduction.The uncoupling tank waterpower residence time controls at 24h.The anaerobic environment in uncoupling pond and there is the factors such as longer hydraulic detention time, for the performance of microbial hydrolytic acidification creates good condition, by acidication effect, the some residual mud generation acidifying of backflow is decomposed, and the inorganic sand carried in active sludge is separated, for the raising of subsequent bio mud and inorganic sand separator separation efficiency is laid a good foundation, meanwhile, the mud after acidifying decomposition also can provide certain carbon source support for aeration tank.
(4) mud after being processed in uncoupling pond sends into biological sludge and inorganic sand separator, utilize organic sludge and the difference of inorganic fine sand on particle diameter and density, make both in rotary course, produce different cyclotron radius and realize being separated, also effectively improve the activity of mud after being separated simultaneously, the aeration tank of mud decrement main process is back to through separator overflow mud mouth high reactivity organic sludge out, microorganism through the anaerobism hungry stage is able to energy recovery in aeration tank, the inorganic sand of the high stability that underflow opening is discharged discharges as excess sludge (inorganic mud), realize the zero release of biological sludge, effectively prevent the secondary pollution problem of active sludge.
Advantage of the present invention is as follows
(1) the present invention is in OSA mud decrement main process, the anaerobic environment in anaerobism uncoupling pond and longer hydraulic detention time (24h) create good condition for the performance of microbial hydrolytic acidification, some residual sludge disintegration is made by acidication effect, and make the inorganic sand separation of carrying secretly in active sludge, be conducive to improving biological sludge and inorganic sand separator separation efficiency, also reply for aeration tank microorganism energy and provide carbon source support, not only increasing mud decrement effect also can safeguards system effluent quality.
(2) by embedding biological sludge and inorganic sand separator in the return sludge line of mud decrement main process, mud decrement effect can be improved, the excess sludge got rid of replaces active sludge with inorganic sand, effectively achieve the zero discharge of biological sludge of Sewage treatment systems, avoid the secondary pollution of active sludge and reduce sewage, sludge treatment cost.
(3) biological sludge and inorganic sand separator are located in the return sludge line of mud decrement main process, but not make larger change to main process, this effectively reduces the improvement cost of sewage, sludge treating system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the waste disposal plant that the present invention proposes.
Embodiment
See Fig. 1, this device forms OSA mud decrement main process by aeration tank 1, second pond 4, anaerobism uncoupling pond 5.Biological sludge and inorganic sand separator 6 are embedded in return sludge line.Raw waste water enters aeration tank 1 with the high reactivity organic sludge from separator 6 overflow sludge mouth by water inlet pipe 12 together with reflux sludge tube 17, be connected by waste pipe 13 between water side, aeration tank 1 with second pond 4 feed-water end, be connected by reflux sludge tube 15 bottom second pond 4 with between the feed-water end of anaerobism uncoupling pond 5, be connected by reflux sludge tube 16 bottom anaerobism uncoupling pond 5 with between separator 6 opening for feed, second pond 4 discharges system water outlet by top waste pipe 14, and separator 6 discharges excess sludge (inorganic mud) by underflow opening through sludge pipe 18.
System sludge backflow is all carried by sludge pump 10.Aeration tank 1 and anaerobism uncoupling pond 5 muddy water mixed solution are uniformly mixed by agitator 7.Oxygen supply aeration is carried out by gas blower 8 and aeration tube 9 in aeration tank 1.Anaerobism uncoupling pond 5 establishes heating rod 11 to regulate temperature.
Aeration tank 1 is divided into pre-reaction zone 2 and main reaction region 3.Anaerobism uncoupling pond 5 adopts the structure formation of top cylinder shape, lower cone shape.
The process that this device specifically carries out sewage disposal and mud decrement is as follows:
(1) raw waste water enters aeration tank 1 from device top with the high reactivity organic sludge from separator 6 overflow sludge mouth by water inlet pipe 12 together with reflux sludge tube 17, this tank waterpower residence time controls at 4.5-5.25h, aeration tank 1 is made up of pre-reaction zone 2 and main reaction region 3 two portions, biological selector effect is played in pre-reaction zone 2, active sludge is made to experience the absorption phase of a high loading in pre-reaction zone, experience the substrate degradation stage compared with underload subsequently in main reaction region 3, can effectively suppress thread fungus to breed the sludge bulking caused.Mud from biological sludge and inorganic sand separator 6 has higher activity and carbon source provides, and can make the microorganism through the anaerobism hungry stage in aeration tank 1, be able to energy and recover, realize the removal of inhaling phosphorus denitrogenation and organic pollutant simultaneously.Muddy water mix and blend is carried out by agitator 7 in described aeration tank 1, carries out oxygen supply aeration by gas blower 8 and aeration tube 9.
(2) muddy water mixed solution after the biochemical reaction of aeration tank 1 enters second pond 4 by waste pipe 13, second pond 4 hydraulic detention time controls at 1.7h, through having precipitated mud-water separation, process water outlet up to standard to be discharged by waste pipe 14, precipitating sludge delivers into anaerobism uncoupling pond 5 by reflux sludge tube 15 and sludge pump 10.
(3) hydraulic detention time in above-mentioned anaerobism uncoupling pond 5 is about 24h, and aerobic microbiological obtains energy from the oxidation of aeration tank 1 organic substrates, cannot generate energy when entering the anaerobism uncoupling pond 5 not having provand, also just cannot synthesize new cell.Therefore, the alternate cycles of aerobic-anaerobism facilitates katabolism in anaerobism uncoupling pond 5 and is separated with anabolic, achieves mud decrement.In addition, the anaerobic environment in this pond adds longer hydraulic detention time, condition is created for anerobe and amphimicrobe play acidication effect, by acidication effect, returned sluge is decomposed, and make the inorganic sand separation of carrying secretly in active sludge, be conducive to the separation efficiency improving biological sludge and inorganic sand separator 6, also reply for aeration tank microorganism energy and provide carbon source support, not only increase mud decrement effect and also ensured system effluent quality.Mud after uncoupling delivers into biological sludge and inorganic sand separator 6 by reflux sludge tube 16 and sludge pump 10.Described anaerobism uncoupling pond 5 muddy water mixed solution is stirred by agitator 7, carries out temperature adjustment by heating rod 11.
(4) above-mentioned biological sludge and inorganic sand separator 6, utilize organic sludge and the difference of inorganic fine sand on particle diameter and density, make both in rotary course, produce different cyclotron radius and realize being separated, also substantially increase the activity of mud after being separated simultaneously, the high reactivity organic sludge of discharging through separator 6 overflow mud mouth is delivered to aeration tank 1 by sludge pipe 17 and sludge pump 10, the inorganic sand with higher stability that separator 6 underflow opening is discharged discharges system with the form of excess sludge through sludge pipe 18, realizes the zero release of Sewage treatment systems active sludge.Enter the sludge concentration of biological sludge and inorganic sand separator 6 between 10g/L ~ 15g/L.
embody rule example:with the sanitary sewage of campus, Chongqing discharge for handling object, device flooding velocity is 5m
3/ d, influent quality is COD:205-486mg/L, NH
3-N:15-36mg/L, TN:26-77mg/L, TP:4.3-10.2mg/L, SS:125-466mg/L, device aeration tank VSS/TSS value is about 0.32.The inspection of device process effluent COD concentration does not measure, and closely very removes; NH
3-N concentration is at below 5.5mg/L, and rate of on average going out is greater than 89%; TN concentration is less than 17mg/L, and average removal rate is more than 83%; TP concentration is less than 1.5mg/L, and average removal rate is more than 89%, and effluent quality can meet " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level B standard.In aeration tank, VSS/TSS value reaches 0.55, the excess sludge VSS/TSS value <0.06 that biological sludge and inorganic sand separator underflow opening are discharged, and namely in institute's spoil disposal, organic content is extremely low, substantially can be considered inorganic sand.
Claims (2)
1. one kind embeds the waste disposal plant of the zero discharge of biological sludge of active sludge and inorganic sand separator, it is characterized in that, device comprises the OSA mud decrement main body be made up of aeration tank (1), second pond (4) and anaerobism uncoupling pond (5), raw waste water enters aeration tank by water inlet pipe (12), be connected by waste pipe (13) between water side, aeration tank with second pond feed-water end, second pond discharges system water outlet by top waste pipe (14), is connected bottom second pond with between the feed-water end of anaerobism uncoupling pond by reflux sludge tube (15);
Device also comprises biological sludge and inorganic sand separator (6), be connected by reflux sludge tube (16) with before inorganic sand separator opening for feed with biological sludge bottom anaerobism uncoupling pond, biological sludge is connected by reflux sludge tube (17) with aeration tank entrance end with inorganic sand separator overflow mud mouth, and biological sludge and inorganic sand separator underflow opening get rid of excess sludge by sludge pipe;
Described aeration tank is divided into pre-reaction zone (2) and main reaction region (3), biological selector effect is mainly played in pre-reaction zone, active sludge is made to experience the absorption phase of a high loading in pre-reaction zone, Degradation is mainly played in main reaction region, make active sludge in the substrate degradation stage of main reaction region experience compared with underload, suppress thread fungus to breed the sludge bulking caused;
Described second pond adopts radial-flow structure;
Described anaerobism uncoupling pond adopts the structure formation of top cylinder shape, lower cone shape;
In aeration tank and anaerobism uncoupling pond, be equipped with agitator (7), muddy water mixed solution is uniformly mixed;
In anaerobism uncoupling pond, establish heating rod (11) to regulate temperature.
2. utilize device described in claim 1 to carry out the method for sewage disposal, its step is as follows:
(1) sewage and enter aeration tank in the lump from the active sludge of biological sludge and inorganic sand separator is allowed, hydraulic detention time controls at 4.5-5.25h, active sludge is made to experience the absorption phase of a high loading in pre-reaction zone, carry out bioselection, subsequently in the substrate degradation stage of main reaction region experience compared with underload, thread fungus is suppressed to breed the sludge bulking caused;
(2) mixed solution after the biological respinse of aeration tank enters second pond, and hydraulic detention time is about 1.7h, and complete mud-water separation by precipitation operation, go out supernatant qualified discharge, partly precipitated mud enters anaerobism uncoupling pond by reflux sludge tube;
(3) mud completes katabolism by the alternate cycles of aerobic/anaerobic and is separated with anabolic in anaerobism uncoupling pond, and realize sludge reduction, the uncoupling tank waterpower residence time controls at 24h;
(4) mud after being processed in uncoupling pond sends into biological sludge and inorganic sand separator, utilize organic sludge and the difference of inorganic fine sand on particle diameter and density, make both in rotary course, produce different cyclotron radius and realize being separated, improve the activity of mud after being separated simultaneously, be back to the aeration tank of mud decrement main process through separator overflow mud mouth high reactivity organic sludge out, the microorganism through the anaerobism hungry stage is able to energy recovery in aeration tank; Inorganic sand through the high stability of separator underflow opening discharge is excess sludge discharge, realizes the zero release of biological sludge.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105859079A (en) * | 2016-04-20 | 2016-08-17 | 辽宁中部环保有限公司 | Biochemical sludge reduction integrated device and using method thereof |
| CN106116087A (en) * | 2016-08-25 | 2016-11-16 | 辽宁石油化工大学 | Activated sludge fermentation tank |
| CN106587345A (en) * | 2017-02-24 | 2017-04-26 | 宜兴市建邦环境投资有限责任公司 | Composite type sludge reduction anaerobic digester |
| CN107235556A (en) * | 2016-03-29 | 2017-10-10 | 吉林建筑大学 | A kind of humic biological coupling sludge reduction method in situ |
| CN109205937A (en) * | 2018-09-29 | 2019-01-15 | 山东天水务工程有限公司 | Biochemical sludge zero-emission sewage treatment process |
| CN111717987A (en) * | 2020-06-24 | 2020-09-29 | 玖龙纸业(天津)有限公司 | Method and device for removing sand from sludge in aeration tank |
| CN114853185A (en) * | 2022-05-26 | 2022-08-05 | 上海蓝科石化环保科技股份有限公司 | High-inorganicity sludge inorganics separation and recycling system and process |
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| CN111717987A (en) * | 2020-06-24 | 2020-09-29 | 玖龙纸业(天津)有限公司 | Method and device for removing sand from sludge in aeration tank |
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