CN108341572A - A method of realizing that sludge recessive growth is reduced using Fenton oxidation coupling Microbial Iron reduction - Google Patents

A method of realizing that sludge recessive growth is reduced using Fenton oxidation coupling Microbial Iron reduction Download PDF

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Publication number
CN108341572A
CN108341572A CN201810108673.7A CN201810108673A CN108341572A CN 108341572 A CN108341572 A CN 108341572A CN 201810108673 A CN201810108673 A CN 201810108673A CN 108341572 A CN108341572 A CN 108341572A
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sludge
reaction
fenton
concentration
decrement
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CN108341572B (en
Inventor
薛罡
陈红
钱雅洁
李响
张文启
刘振鸿
孟程程
李珂
徐先宝
王静
张禾
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Shanghai Sen Sen Environmental Engineering Co Ltd
Donghua University
National Dong Hwa University
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Shanghai Sen Sen Environmental Engineering Co Ltd
Donghua University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C02F11/04—Anaerobic treatment; Production of methane by such processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis

Abstract

The invention discloses a kind of methods for realizing sludge recessive growth decrement using Fenton oxidation coupling Microbial Iron reduction, sewage is after activated sludge biochemical reacts, muddy water mixed solution is quiet heavy in secondary settling tank, partial sludge is back to Biochemistry Reaction System, and excess sludge is discharged into sludge concentration tank and carries out concentration；The conditioned dehydration of sludge part of concentration basin, outward transport disposition are partly discharged into Microbial Iron reduction pond, realize sludge hydrolytic and Fe3+Reduction；Sludge is discharged into after Microbial Iron restores pond in sludge Fenton's reaction pond, is started Fenton's reaction and is carried out brokenly born of the same parents' processing to sludge；Sludge is broken into cytosol and goes to regulating reservoir, sludge realizes further endogenous consumption decrement；Sludge in regulating reservoir is broken into cytosol and is back to biochemical reaction tank.The present invention can be achieved the sludge reduction inside sewage disposal system and strengthen the Biochemical Treatment of waste water, and easy to operate, cost is relatively low, and a kind of feasible method is provided for the efficient decrement and improvement wastewater biochemical treatment effect of excess sludge.

Description

It is a kind of to realize that sludge recessive growth is reduced using Fenton oxidation coupling Microbial Iron reduction Method
Technical field
The invention belongs to environmental technology fields, and in particular to a kind of to realize dirt using Fenton oxidation coupling Microbial Iron reduction The method of mud recessive growth decrement.
Background technology
In recent years, the processing handling problems of excess sludge have become the environmental problem that solution is badly in need of in the whole world, at sewage For reason based on Wastewater Treated by Activated Sludge Process, sewage disposal process generates the excess sludge for being largely rich in organic matter.According to statistics, 2013 The dewatered sludge that China generates weighs about 6250000 tons, and is in 13% annual growth (Water from 2007 to 2013 years Research, 2015,78：60-73), will environmental and human health impacts be generated with serious harm without dealing carefully with the sludge of disposition. Currently, the method based on specific resistance to filtration is primarily upon four its minimizing, innoxious, stabilisation and recycling aspects.By It is rich in organic matter in excess sludge, in recent years, has researched and proposed recessive growth Sludge Reduction Technologies, i.e. microorganism utilizes cell The matrix hydrolyzed to form recombines the growth pattern of microflora organisms, and the matrix that recessive growth utilizes is the production that cell breaks born of the same parents Object.The backing up of breaking sludge product is to biological treatment system and is theoretically analyzed by the process that microorganism utilizes and will necessarily realize one Fixed mud decrement effect.
To achieve the purpose that sludge recessive growth is reduced, key is to realize effective broken born of the same parents of sludge, passes through physics, chemistry Or the hydrolysis of biological means reinforcement sludge, the eucaryotic cell structure of microorganism in sludge is destroyed, breaks the zoogloea flco of sludge, makes micro- life Solid organic in object thalline, which is discharged into liquid phase, becomes dissolved organic matter, which can be used as sewage disposal system The matrix of sludge regeneration in system.Key-sludge as sludge recessive growth breaks born of the same parents, currently, broken born of the same parents' skill of existing research Art includes that ultrasonic method, mechanical shearing method, high-pressure process, heating, ozone oxidation plus alkali crack, add enzyme preparation etc., but are limited to The problems such as of high cost, high energy consumption, bad reduced training, rarely has application at present.
Invention content
Problem to be solved by this invention is：How to be given birth to using Fenton oxidation coupling Microbial Iron reduction realization sludge recessiveness Long decrement, while improving the treatment effect of waste water.
To solve the above-mentioned problems, the present invention uses following technical scheme：
A method of realizing that sludge recessive growth is reduced using Fenton oxidation coupling Microbial Iron reduction, feature exists In including the following steps：
Step 1)：For sewage after activated sludge biochemical reacts, muddy water mixed solution is quiet heavy in secondary settling tank, partial sludge reflux To Biochemistry Reaction System, excess sludge is discharged into sludge concentration tank and carries out concentration；
Step 2)：The conditioned dehydration of sludge part of concentration basin, outward transport disposition are partly discharged into Microbial Iron reduction pond, It keeps microorganism to be in anaerobic condition, is stirred to react, realize sludge hydrolytic and Fe3+Reduction；
Step 3)：Sludge is discharged into after Microbial Iron restores pond in sludge Fenton's reaction pond, and acid for adjusting pH value is added to acid Property, Fe is added2+And H2O2, stir, start Fenton's reaction and born of the same parents' processing is carried out brokenly to sludge；
Step 4)：After Fenton's reaction, sludge is broken into cytosol and goes to regulating reservoir, add alkali to adjust pH value, and be aerated, makes to time The Fe of fragrant reaction process2+It is converted into Fe3+, the further endogenous consumption decrement of sludge realization；
Step 5)：Sludge in regulating reservoir is broken into cytosol and is back to biochemical reaction tank, it is active as sludge growth carbon source Sludge utilizes, and realizes the recessive growth decrement of sludge.
Preferably, the ratio that Biochemistry Reaction System is back in the step 1) is 50-100%, and remaining sludge is through weight Power concentration 12-20h, sludge concentration after concentration are 15-25g/L, and the sludge pump of 50-85% enters microorganism after concentration Iron restores in pond, remaining is dehydrated through sludge conditioning, outward transport disposition.
Preferably, the Microbial Iron reduction pond in the step 2) is stirred using slow mechanical or bottom agitating mode is tieed up It holds sludge mixing not precipitate, mixing speed 20-60rpm/min, dissolved oxygen concentration is less than 0.5mg/L, anaerobic reaction 1-4d.
Preferably, the sludge Fenton's reaction pond of the step 3) carries out pH value adjusting using sulfuric acid or hydrochloric acid, adjusts pH It is worth to 3-5, the Fe of addition2+FeCl can be used2Or FeSO4, Fe2+Addition be 0.05-0.2kg/ (kg dewatered sludges), H2O2's Dosage is 0.3-3mol/ (kg dewatered sludges), and mechanical agitation speed is 60-150rpm/min, and the Fenton's reaction time is 0.5-5h.
Preferably, it is NaOH or Ca (OH) that sludge, which breaks the alkali that cytosol is added in regulating reservoir, in the step 4)2, pH value tune It saves to 6-8；Aeration makes dissolved oxygen concentration be 0.5~3.0mg/L, and aeration time is 0.5~3h.
Preferably, the sludge in the step 5) breaks cytosol and enters from biochemistry pool water inlet front end, is participated in after being mixed with sewage Biochemical reaction, realizes the recessive growth decrement of sludge, and improves the Biochemical Treatment of waste water.
The present invention provides a kind of methods that can realize excess sludge reduction, are carried out by Fenton's reaction residual active sludge Broken born of the same parents' processing, releases the organic carbon source of intracellular, then couples the endogenous consumption decrement of sludge, sludge break cytosol return to again to Biochemical wastewater treatment system, the Fe for participating in the biochemical reaction of activated sludge, and containing3+Be conducive to the metabolism of biology, and can be aided with Chemical dephosphorization.Secondary settling tank contains Fe because Fenton breaks the introducing of cytosol in the sludge of discharge3+, coupled before Fenton's reaction pond micro- Biology-iron restores pond by Fe3+It is reduced to Fe2+, contribute in follow-up Fenton's reaction pond to reduce Fe2+Usage amount, and Microbial Iron The hydrolysis of excess sludge also helps broken born of the same parents' efficiency of sludge in Fenton's reaction pond in reduction pond, and medicament use is reduced to reach Amount improves the purpose of mud decrement effect.
Compared with prior art, the present invention has the advantages that：
(1) this method has coupled Fenton processing sludge and has realized that sludge breaks born of the same parents, is further aerated after broken born of the same parents and realizes that sludge is endogenous Consumption decrement, and the usage amount that Microbial Iron reduction reduces Fenton reagent is coupled, mud decrement effect is improved, it can be achieved that sludge subtracts Amount 35~60%；
(2) Fenton's reaction that this method uses contains iron ion, with sludge break cytosol enter the iron of Biochemistry Reaction System from Son contributes to the growth of microorganism in Biochemistry Reaction System and reinforced phosphor-removing, improves the flocculability and precipitability of sludge, realizes dirty The efficient stable of water biochemical system；
(3) this method can realize the decrement of sludge inside sewage disposal system, and technically simple easy, cost is relatively low, decrement Effect is good.
Description of the drawings
Fig. 1 is that a kind of restored using Fenton oxidation coupling Microbial Iron provided by the invention realizes that sludge recessive growth is reduced Method process schematic representation.
Specific implementation mode
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is coordinated to be described in detail below.
Embodiment 1
A method of realizing that sludge recessive growth is reduced using Fenton oxidation coupling Microbial Iron reduction, including following step Suddenly：
(1) certain treatment of dyeing wastewater factory uses the biochemical processing process of anaerobic- anoxic- oxic (AAO) to having in sewage Machine object, nutriment nitrogen phosphorus are removed.Two groups of process reactors identical with treatment of dyeing wastewater factory are built in laboratory, are connect The activated sludge of the sewage treatment plant of kind same concentrations, biochemical reaction inlet COD concentration are 450-550mg/L, ammonia nitrogen concentration For 45-60mg/L, total nitrogen concentration 55-70mg/L, a concentration of 5-10mg/L for total phosphorus of intaking, after AAO biochemical treatments, operation After stabilization, the effluent COD concentration of two groups of reactors is 110-150mg/L, ammonia nitrogen concentration 5-8mg/L, total nitrogen concentration 18- 25mg/L, total phosphorus concentration 1.2-2.0mg/L.
(2) as shown in Figure 1, one of which reactor, sewage carry out mud-water separation after biochemical reaction, into secondary settling tank, Returned sludge ratio is 80%, and remainder enters sludge concentration tank, and gravity concentration handles 12h, and sludge is a concentration of after concentration 16g/L, wherein 50% thickened sludge is discharged into microbiological anaerobic iron reduction reaction pond, in addition 50% thickened sludge is through lime tune Plate compression is carried out after reason；In microbiological anaerobic iron restores pond, using mechanical agitation mode, mixing speed 20rpm/min is molten It solves oxygen concentration and is less than 0.5mg/L, reaction time 1.5d；In sludge Fenton's reaction pond, sulphur acid for adjusting pH value is added to 4, is added FeCl2, make Fe2+Addition be 0.05kg/ (kg dewatered sludges), H2O2Dosage be 0.6mol/ (kg dewatered sludges), machinery stirs It is 80rpm/min to mix speed, and the Fenton's reaction time is 1h；Sludge after Fenton's reaction is broken into cytosol and drains into regulating reservoir, is added NaOH adjusts pH value to 6-8；Aeration makes dissolved oxygen concentration be 1mg/L, aeration time 1h；Sludge in regulating reservoir is broken into born of the same parents Liquid pump participates in biochemical reaction to biochemistry pool water inlet front end after being mixed with sewage.
(3) another group of reactor, sewage carry out mud-water separation after biochemical reaction, into secondary settling tank, and returned sludge ratio is 80%, the sludge of remainder is all discharged into sludge concentration tank, and the sludge of concentration basin is through lime conditioning and plate compression.
(4) after running 15 days, using the experimental group of Fenton oxidation sludge, more another group of reduction 42% of sludge yield；Fenton The experimental group of oxidized sludge, treatment effect further increase, effluent COD concentration 60-80mg/L, ammonia nitrogen concentration 5-6mg/L, Total nitrogen concentration is 10-12mg/L, total phosphorus concentration 0.1-0.3mg/L.
Embodiment 2
A method of realizing that sludge recessive growth is reduced using Fenton's reaction coupling Microbial Iron reduction, including following step Suddenly：
(1) using inversion A 2O techniques to the organic matter in sewage, nutriment nitrogen phosphorus is removed certain sanitary sewage.In Laboratory builds two groups of process reactors identical with treatment of dyeing wastewater factory, is inoculated with the work of the sewage treatment plant of same concentrations Property sludge, biochemical reaction inlet COD concentration be 350-420mg/L, ammonia nitrogen concentration 35-50mg/L, total nitrogen concentration 45- 55mg/L, a concentration of 8-13mg/L for total phosphorus of intaking, through inversion A 2O technique biochemical treatments, after stable, two groups of reactors Effluent COD concentration is 65-85mg/L, ammonia nitrogen concentration 5-8mg/L, total nitrogen concentration 15-20mg/L, total phosphorus concentration 1.0- 1.5mg/L。
(2) as shown in Figure 1, one of which reactor, sewage carry out mud-water separation after biochemical reaction, into secondary settling tank, Returned sludge ratio is 60%, and remainder enters sludge concentration tank, and gravity concentration handles 15h, and sludge is a concentration of after concentration 18g/L, wherein 70% thickened sludge is discharged into microbiological anaerobic iron reduction reaction pond, in addition 30% thickened sludge is through lime tune Reason, and carry out plate compression；In microbiological anaerobic iron restores pond, using mechanical agitation mode, mixing speed 25rpm/min, Dissolved oxygen concentration is less than 0.5mg/L, reaction time 2.0d；In sludge Fenton's reaction pond, addition salt acid for adjusting pH value to 3.5, FeCl is added2, make Fe2+Addition be 0.15kg/ (kg dewatered sludges), H2O2Dosage be 1.2mol/kg (dewatered sludge), machine Tool mixing speed is 90rpm/min, and the Fenton's reaction time is 2h；Sludge after Fenton's reaction is broken into cytosol and drains into regulating reservoir, is added Enter Ca (OH)2, pH value is adjusted to 7.5；Aeration makes dissolved oxygen concentration be about 1.0mg/L, aeration time 2h；It will be in regulating reservoir Sludge breaks cytosol and pumps to biochemistry pool water inlet front end, and biochemical reaction is participated in after being mixed with sewage.
(3) another group of reactor, sewage carry out mud-water separation after biochemical reaction, into secondary settling tank, and returned sludge ratio is 60%, the sludge of remainder is all discharged into sludge concentration tank, and the sludge of concentration basin is through lime conditioning and plate compression.
(4) after running 30 days, using the experimental group of Fenton oxidation sludge, more another group of reduction 50% of sludge yield；Fenton The experimental group of oxidized sludge, treatment effect further increase, effluent COD concentration 35-45mg/L, ammonia nitrogen concentration 3-5mg/L, Total nitrogen concentration is 6-12mg/L, total phosphorus concentration 0.1-0.2mg/L.

Claims (6)

1. a kind of method for realizing sludge recessive growth decrement using Fenton oxidation coupling Microbial Iron reduction, which is characterized in that Include the following steps：
Step 1)：Sewage is after activated sludge biochemical reacts, and muddy water mixed solution is quiet heavy in secondary settling tank, and partial sludge is back to life Change reaction system, excess sludge is discharged into sludge concentration tank and carries out concentration；
Step 2)：The conditioned dehydration of sludge part of concentration basin, outward transport disposition are partly discharged into Microbial Iron reduction pond, keep Microorganism is in anaerobic condition, is stirred to react, and realizes sludge hydrolytic and Fe3+Reduction；
Step 3)：Sludge is discharged into after Microbial Iron restores pond in sludge Fenton's reaction pond, and acid for adjusting pH value is added to acidity, adds Enter Fe2+And H2O2, stir, start Fenton's reaction and born of the same parents' processing is carried out brokenly to sludge；
Step 4)：After Fenton's reaction, sludge is broken into cytosol and goes to regulating reservoir, add alkali to adjust pH value, and be aerated, keeps a sweet smell anti- Answer the Fe of process2+It is converted into Fe3+, the further endogenous consumption decrement of sludge realization；
Step 5)：Sludge in regulating reservoir is broken into cytosol and is back to biochemical reaction tank, grows carbon source by activated sludge as sludge It utilizes, realizes the recessive growth decrement of sludge.
2. the side of sludge recessive growth decrement is realized using Fenton's reaction coupling Microbial Iron reduction as described in claim 1 Method, which is characterized in that the ratio that Biochemistry Reaction System is back in the step 1) is 50-100%, and remaining sludge is through gravity Concentration 12-20h, sludge concentration after concentration are 15-25g/L, and the sludge pump of 50-85% enters Microbial Iron after concentration It restores in pond, remaining is dehydrated through sludge conditioning, outward transport disposition.
3. the side of sludge recessive growth decrement is realized using Fenton's reaction coupling Microbial Iron reduction as described in claim 1 Method, which is characterized in that the Microbial Iron reduction pond in the step 2) is stirred using slow mechanical or bottom agitating mode dimension It holds sludge mixing not precipitate, mixing speed 20-60rpm/min, dissolved oxygen concentration is less than 0.5mg/L, anaerobic reaction 1-4d.
4. the side of sludge recessive growth decrement is realized using Fenton's reaction coupling Microbial Iron reduction as described in claim 1 Method, which is characterized in that the sludge Fenton's reaction pond of the step 3) carries out pH value adjusting using sulfuric acid or hydrochloric acid, adjusts pH It is worth to 3-5, the Fe of addition2+FeCl can be used2Or FeSO4, Fe2+Addition be 0.05-0.2kg/ (kg dewatered sludges), H2O2's Dosage is 0.3-3mol/ (kg dewatered sludges), and mechanical agitation speed is 60-150rpm/min, and the Fenton's reaction time is 0.5-5h.
5. the side of sludge recessive growth decrement is realized using Fenton's reaction coupling Microbial Iron reduction as described in claim 1 Method, which is characterized in that it is NaOH or Ca (OH) that sludge, which breaks the alkali that cytosol is added in regulating reservoir, in the step 4)2, pH value tune It saves to 6-8；Aeration makes dissolved oxygen concentration be 0.5~3.0mg/L, and aeration time is 0.5~3h.
6. the side of sludge recessive growth decrement is realized using Fenton's reaction coupling Microbial Iron reduction as described in claim 1 Method, which is characterized in that the sludge in the step 5) breaks cytosol and enters from biochemistry pool water inlet front end, and life is participated in after being mixed with sewage Change reaction, realize the recessive growth decrement of sludge, and improves the Biochemical Treatment of waste water.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114291993A (en) * 2022-01-25 2022-04-08 中信环境技术（广州）有限公司 Fenton sludge treatment system and method

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CN103755096A (en) * 2014-01-17 2014-04-30 上海交通大学 Coupled Fenton oxidation and anaerobic digestion reactor for treating surplus sludge
CN105366899A (en) * 2015-12-10 2016-03-02 东华大学 Ozone-anaerobic iron reduction combined Fenton oxidation technology for sludge reduction
CN105417869A (en) * 2015-12-10 2016-03-23 东华大学 Fenton oxidation-biological combination treatment technology capable of achieving ozone-anaerobic iron reduction and sludge reduction
CN107140804A (en) * 2017-03-06 2017-09-08 天津壹新环保工程有限公司 Fenton method for sludge treatment and device that a kind of molysite is recycled
CN206553372U (en) * 2017-03-06 2017-10-13 天津壹新环保工程有限公司 The Fenton sludge treatment equipment that a kind of molysite is recycled

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009101455A1 (en) * 2008-02-11 2009-08-20 Pantelis Xynogalas Physicochemical method of processing liquid and semisolid wastes of olive mills using ozone (o3)
CN103755096A (en) * 2014-01-17 2014-04-30 上海交通大学 Coupled Fenton oxidation and anaerobic digestion reactor for treating surplus sludge
CN105366899A (en) * 2015-12-10 2016-03-02 东华大学 Ozone-anaerobic iron reduction combined Fenton oxidation technology for sludge reduction
CN105417869A (en) * 2015-12-10 2016-03-23 东华大学 Fenton oxidation-biological combination treatment technology capable of achieving ozone-anaerobic iron reduction and sludge reduction
CN107140804A (en) * 2017-03-06 2017-09-08 天津壹新环保工程有限公司 Fenton method for sludge treatment and device that a kind of molysite is recycled
CN206553372U (en) * 2017-03-06 2017-10-13 天津壹新环保工程有限公司 The Fenton sludge treatment equipment that a kind of molysite is recycled

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114291993A (en) * 2022-01-25 2022-04-08 中信环境技术（广州）有限公司 Fenton sludge treatment system and method
CN114291993B (en) * 2022-01-25 2023-02-17 中信环境技术（广州）有限公司 Fenton sludge treatment system and method

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