CN103058366A - Culture method for anaerobic granular sludge for acrylic waste water biochemical treatment - Google Patents
Culture method for anaerobic granular sludge for acrylic waste water biochemical treatment Download PDFInfo
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Abstract
The invention relates to a culture method for anaerobic granular sludge for acrylic waste water biochemical treatment, belonging to the technical field of waste water treatment. According to the culture method, a culture process for the granular sludge is divided into three stages, a sludge domestication stage is a process for inoculating the sludge to be adaptive to the water quality of acrylic waste water, reserving high-quality strains, and eliminating the other strains; a sludge granulation stage is the key stage of the culture for the anaerobic granular sludge, and the anaerobic granular sludge needs to be controlled in the aspects of water inlet organic matter concentration, ascending flow velocity, organic load, water inlet basicity, pH, nutrient elements, temperature, trace elements, flocculant pouring and the like; and when the grain ratio increasing speed of the granular sludge is sharply reduced, and the removal rate for effluent CODCr (chemical oxygen demand Cr) is stabilized to be greater than 70%, a mature stage for the granular sludge is entered, and the entrance in the mature stage indicates that the culture for the granular sludge is finished. With the culture method, the problem that a method for culturing common anaerobic granular sludge is not suitable for culturing anaerobic granular sludge aiming at acrylic waste water is solved, and the successful culture for the granular sludge is effectively ensured.
Description
Technical field
The present invention relates to a kind of cultural method of the anaerobic grain sludge for the acrylic acid wastewater biochemical treatment, belong to technical field of waste water processing.
Background technology
Acrylic acid wastewater organic content high (COD can up to several ten thousand mg/L), complicated and toxic (containing acetic acid, methacrylic acid, vinylformic acid, formaldehyde, acetaldehyde etc.), being strongly-acid (pH is between 1.5-3) more, lacking nutritive ingredient, is the unmanageable trade effluent of a class.At present, the technique of acrylic acid waste water treatment has burning method, Wet Catalytic Oxidation Method and biological process.
Burning method is with spraying into after the waste water atomizing water smoke to be vaporized fully, allows organism complete oxidation in stove in the waste water, resolves into CO
2And H
2O and a little inorganics ash content.Wet Catalytic Oxidation Method refers to utilize the katalysis of catalyzer under High Temperature High Pressure, accelerates a kind of method of organic matter degradation in the waste water.Biological process is a kind of method of processing organic waste water by the metabolism of microorganism self.
Running cost is high, energy consumption is greatly the common feature of burning method and Wet Catalytic Oxidation Method.Consider from economic aspect, limited their range of application.And biological process has the characteristics such as invest and running cost is low, energy consumption is little, is a kind of ideal method of acrylic acid waste water treatment.
Biological process is divided into aerobic method and anaerobic process, and the biological process that is used at present the acrylic acid waste water treatment mostly is anaerobism+aerobic combination process.Anaerobic process is mainly used in removing the most of organism in the water, but effluent index can't reach the water outlet requirement, so utilize follow-up aerobic method to stablize effluent quality.
Why anaerobic process (upflow anaerobic sludge blanket process UASB, expanded granular sludge bed EGSB etc.) can remove higher organic concentration, because the anaerobion in the anaerobic reactor is form with granule sludge exists, microorganism concn is high, and organic matter removal is effective.So the successful operation key of anaerobic reactor is to turn out the granule sludge that settling property is good, specific methanogenic activity is high.
The cultivation of anaerobic grain sludge needs certain water quality and operational conditions, as organic concentration in the waste water can not be too high or too low, nutritive element is wanted sufficient and (be comprised Ca in the water
2+, Mg
2+, Fe
2+Deng trace element), guarantee certain upflow velocity and organic loading etc.For acrylic acid wastewater, because high, the complicated of its organic content and toxic, be strongly-acid more, lack nutritive ingredient, cultivate to be used for its anaerobism high-efficiency strain of degraded and just to have certain difficulty, secondly all applicable for acrylic acid wastewater for the operational conditions of cultivating general anaerobic grain sludge, as the organic loading of anaerobic reactor can reach 10kgCOD/m
3More than the d, the organic loading of acrylic acid wastewater does not then reach.
Summary of the invention
To the objective of the invention is not to be suitable for the problem of cultivating for the anaerobic grain sludge of acrylic acid wastewater in order solving be used to the method for cultivating general anaerobic grain sludge, to have proposed a kind of cultural method of the anaerobic grain sludge for the treatment of acrylic acid wastewater.
The objective of the invention is to be achieved through the following technical solutions.
The cultural method of a kind of anaerobic grain sludge for the acrylic acid wastewater biochemical treatment of the present invention, detailed process is as follows:
Step 1, sludge acclimatization stage: at first in anaerobic reactor, add the mud bacterial classification; Inject continuously acrylic acid wastewater again in reactor, the control inlet COD concentration is at 1500～2000mg/L, and the pH value is 6.5～7.5, and temperature is at 32～37 ℃, and the water inlet upflow velocity is not more than 0.3m/h, and organic loading is not more than 1.0kgCOD/m
3D, and add nitrogen phosphorus nutrition element, guarantee to reach the requirement of anaerobion; Because microorganism has death in the process that adapts to water quality, also have simultaneously the part live microorganism and taken out of by water, shows as the water outlet concentration of suspension higher, need to the mud that water outlet is taken out of be refluxed, to guarantee the sludge concentration in the anaerobic reactor; When water outlet COD clearance improved gradually, the water outlet concentration of suspension also can decrease, and water outlet COD clearance reaches 60% and shows that the sludge acclimatization stage finishes when above, just can enter the granular sludge stage;
Step 2, granulation phase: progressively improve inlet COD concentration, two parameters of organic loading, each raising needs all to guarantee that water outlet COD clearance reaches more than 60%, final inlet COD concentration is not more than 5000mg/L, organic loading is not more than 5kgCOD/m
3D; Along with the increase of mud granule particle diameter, progressively improve upflow velocity; Be the propagation process of accelerate sludge particle, in water inlet, add cationic polyacrylamide (PAM) and trace element supplement Ca
2+, Mg
2+, Fe
2+Control water inlet pH value is 6.5～7.5, and temperature is at 32～37 ℃, and the ratio of COD/ basicity and adds nitrogen phosphorus nutrition element between 2～4.When the particle Specific incremental rate of granule sludge sharply descends, water outlet COD clearance was stabilized in for 70% stage of maturity that enters granule sludge when above, showed that granule sludge is cultivated to finish.
Beneficial effect
(1) cultural method of a kind of anaerobic grain sludge for the acrylic acid wastewater biochemical treatment of the present invention, COD concentration, organic loading, upflow velocity, water inlet pH, temperature, basicity by control water inlet, add the methods such as flocculation agent, nutritive element, trace element, solution is not suitable for the problem of cultivating for the anaerobic grain sludge of acrylic acid wastewater for the method for cultivating general anaerobic grain sludge, effectively guaranteed the successful cultivation of granule sludge.
(2) cultural method of a kind of anaerobic grain sludge for the acrylic acid wastewater biochemical treatment of the present invention, the granule sludge of cultivating has greatly improved the processing efficiency of acrylic acid wastewater, has reduced the quantity discharged of waste water.
(3) cultural method of a kind of anaerobic grain sludge for the acrylic acid wastewater biochemical treatment of the present invention, the granule sludge of cultivating is used for anaerobic reactor, processes the waste water cost well below burning method and catalytic oxidation, has larger economic benefit.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1
The present invention is a kind of cultural method of the anaerobic grain sludge for the acrylic acid wastewater biochemical treatment.The culturing process of granule sludge is divided into three phases, is respectively sludge acclimatization stage, granulation phase and stage of maturity.Detailed process is as follows:
Step 1, sludge acclimatization stage: at first in anaerobic reactor, add the mud bacterial classification; Inject continuously acrylic acid wastewater again in reactor, control inlet COD concentration, pH value, temperature, water inlet upflow velocity, organic loading also adds nitrogen phosphorus nutrition element, guarantees to reach the requirement of anaerobion; When water outlet COD clearance improved gradually, the water outlet concentration of suspension also can decrease, and water outlet COD clearance reaches 60% and shows that the sludge acclimatization stage finishes when above, just can enter the granular sludge stage;
The sludge acclimatization stage is the process that seed sludge adapts to acrylic acid wastewater water quality, and good quality strain remains, and other bacterial classification eliminates.Control reactor operating parameter is as follows:
1) seed sludge kind and quantity: anaerobically digested sludge (water ratio 80%), inoculum size is for guaranteeing that sludge concentration is 30g/L in the reactor;
2) reactor inlet COD concentration: 2000mg/L;
3) reactor water inlet upflow velocity: 0.2m/h;
4) organic loading: 0.2kgCOD/m
3D;
5) water inlet pH value: 6.5-7.2;
6) nutritive element: COD: N: P=200: 5: 1;
7) inflow temperature: 33-37 ℃.
The sludge acclimatization stage has a certain amount of mud and flows out with water outlet, because microorganism has death in the process that adapts to water quality, also having simultaneously the part live microorganism is taken out of by water, show as the water outlet concentration of suspension higher, the mud that needs weekly water outlet to be taken out of refluxes, to guarantee the sludge concentration in the anaerobic reactor.(SS≤100mg/L), water outlet COD clearance are stabilized in 60% and show that the sludge acclimatization stage finishes when above, just can enter the granular sludge stage, and the sludge acclimatization stage is wanted 2 months when the water outlet concentration of suspension reduces.
Step 2, granulation phase: progressively improve inlet COD concentration, two parameters of organic loading, each raising needs all to guarantee that water outlet COD clearance reaches more than 60%, final inlet COD concentration is not more than 5000mg/L, organic loading is not more than 5kgCOD/m
3D; Along with the increase of mud granule particle diameter, progressively improve upflow velocity; Be the propagation process of accelerate sludge particle, in water inlet, add cationic polyacrylamide (PAM) and trace element supplement Ca
2+, Mg
2+, Fe
2+Control water inlet pH value is 6.5～7.5, and temperature is at 32～37 ℃, and the ratio of COD/ basicity and adds nitrogen phosphorus nutrition element between 2～4.
The granular sludge stage is the critical stage that anaerobic grain sludge is cultivated, and the controlling run parameter is as follows:
1) reactor inlet COD concentration: starting point concentration is 2000mg/L, stable rear (water outlet COD clearance is stabilized in more than 60%), and the amplitude with 500mg/L progressively improves at every turn, finally reaches 5000mg/L;
2) reactor water inlet upflow velocity: initial value is 0.2m/h, along with the increase of mud granule, progressively improves upflow velocity, and the amplitude of lifting is that the every increase of particle diameter 1mm upflow velocity increases 0.1m/h.In the operational process, guaranteeing to have every day the 10min upflow velocity is 1m/h, so that mud fully contacts with acrylic acid wastewater;
3) organic loading: initial value is 0.2kgCOD/m
3D, stable rear (water outlet COD clearance is stabilized in more than 60%) is at every turn with 0.5kgCOD/m
3The amplitude of d progressively improves, and finally reaches 5kgCOD/m
3D;
4) water inlet pH value: 6.5-7.5;
5) influent alkalinity: guarantee COD: basicity=3: 1;
6) inflow temperature: 33-37 ℃;
7) nutritive element: COD: N: P=200: 5: 1;
8) trace element: replenish Ca
2+, Mg
2+, Fe
2+
9) add flocculation agent: add cationic PAM.
It is Ca (HCO that basicity is regulated the medicine that adds
3)
2, both played the effect of regulating basicity, play again the effect of trace element supplement; The Na that the urea that nitrogen salt adds, microcosmic salt add
3PO
4Mg
2+, Fe
2+That add respectively is MgSO
4, FeSO
4, dosage is Mg
2+Concentration 100-150mg/L, Fe
2+Concentration 10-20mg/L; The dosage of cationic PAM is 30mg/L, and the granular sludge stage needs 5 months.
When the particle Specific incremental rate of granule sludge sharply descend (for maximum growth rate 20%), water outlet COD clearance was stabilized in for 70% stage of maturity that enters granule sludge when above, showed that the granule sludge cultivation finishes.Granule sludge is the spheroidal of compact structure, and the surface is black gray expandable, and diameter is between 2～5mm.
Claims (1)
1. cultural method that is used for the anaerobic grain sludge of acrylic acid wastewater biochemical treatment, it is characterized in that: detailed process is as follows:
Step 1, sludge acclimatization stage: at first in anaerobic reactor, add the mud bacterial classification; Inject continuously acrylic acid wastewater again in reactor, the control inlet COD concentration is at 1500～2000mg/L, and the pH value is 6.5～7.5, and temperature is at 32～37 ℃, and the water inlet upflow velocity is not more than 0.3m/h, and organic loading is not more than 1.0kgCOD/m
3D, and add nitrogen phosphorus nutrition element, guarantee to reach the requirement of anaerobion; Because microorganism has death in the process that adapts to water quality, also have simultaneously the part live microorganism and taken out of by water, shows as the water outlet concentration of suspension higher, need to the mud that water outlet is taken out of be refluxed, to guarantee the sludge concentration in the anaerobic reactor; When water outlet COD clearance improved gradually, the water outlet concentration of suspension also can decrease, and water outlet COD clearance reaches 60% and shows that the sludge acclimatization stage finishes when above, just can enter the granular sludge stage;
Step 2, granulation phase: progressively improve inlet COD concentration, two parameters of organic loading, each raising needs all to guarantee that water outlet COD clearance reaches more than 60%, final inlet COD concentration is not more than 5000mg/L, organic loading is not more than 5kgCOD/m
3D; Along with the increase of mud granule particle diameter, progressively improve upflow velocity; Be the propagation process of accelerate sludge particle, in water inlet, add cationic polyacrylamide (PAM) and trace element supplement Ca
2+, Mg
2+, Fe
2+Control water inlet pH value is 6.5～7.5, and temperature is at 32～37 ℃, and the ratio of COD/ basicity and adds nitrogen phosphorus nutrition element between 2～4; When the particle Specific incremental rate of granule sludge sharply descends, water outlet COD clearance was stabilized in for 70% stage of maturity that enters granule sludge when above, showed that granule sludge is cultivated to finish.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355403A (en) * | 2014-11-27 | 2015-02-18 | 新疆环境工程技术有限责任公司 | Activated sludge culture acclimatization method for chemical industry wastewater treatment |
| CN104877948A (en) * | 2015-06-26 | 2015-09-02 | 盐城工学院 | Screening identification and degradation property research method of acrylic resin degrading bacteria |
| CN105174449A (en) * | 2015-10-29 | 2015-12-23 | 中国石油天然气集团公司 | Up-flow anaerobic sludge blanket reactor of improved structure |
| CN105198080A (en) * | 2015-10-29 | 2015-12-30 | 中国石油天然气集团公司 | Anaerobic particle sludge rapid culture method suitable for oil refining and chemical engineering wastewater treatment |
| CN107352647A (en) * | 2017-09-08 | 2017-11-17 | 南京大学 | A kind of method for improving anaerobic granulation efficiency |
| CN108017148A (en) * | 2017-12-13 | 2018-05-11 | 山鹰国际控股股份公司 | Anaerobic reactor quick start method |
| CN110482693A (en) * | 2019-07-22 | 2019-11-22 | 四川工商职业技术学院 | A kind of cultural method of anaerobic grain sludge |
| CN110980944A (en) * | 2019-12-19 | 2020-04-10 | 武汉森泰环保股份有限公司 | Culture method of anaerobic granular sludge |
| CN111138055A (en) * | 2020-01-10 | 2020-05-12 | 重庆市环卫集团有限公司 | Method for cultivating high-temperature anaerobic granular sludge for kitchen waste treatment |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355403A (en) * | 2014-11-27 | 2015-02-18 | 新疆环境工程技术有限责任公司 | Activated sludge culture acclimatization method for chemical industry wastewater treatment |
| CN104355403B (en) * | 2014-11-27 | 2016-01-06 | 新疆环境工程技术有限责任公司 | A kind of activated sludge culture method for chemical wastewater treatment |
| CN104877948A (en) * | 2015-06-26 | 2015-09-02 | 盐城工学院 | Screening identification and degradation property research method of acrylic resin degrading bacteria |
| CN105174449A (en) * | 2015-10-29 | 2015-12-23 | 中国石油天然气集团公司 | Up-flow anaerobic sludge blanket reactor of improved structure |
| CN105198080A (en) * | 2015-10-29 | 2015-12-30 | 中国石油天然气集团公司 | Anaerobic particle sludge rapid culture method suitable for oil refining and chemical engineering wastewater treatment |
| CN107352647A (en) * | 2017-09-08 | 2017-11-17 | 南京大学 | A kind of method for improving anaerobic granulation efficiency |
| CN107352647B (en) * | 2017-09-08 | 2020-01-07 | 南京大学 | Method for improving anaerobic sludge granulation efficiency |
| CN108017148A (en) * | 2017-12-13 | 2018-05-11 | 山鹰国际控股股份公司 | Anaerobic reactor quick start method |
| CN110482693A (en) * | 2019-07-22 | 2019-11-22 | 四川工商职业技术学院 | A kind of cultural method of anaerobic grain sludge |
| CN110980944A (en) * | 2019-12-19 | 2020-04-10 | 武汉森泰环保股份有限公司 | Culture method of anaerobic granular sludge |
| CN110980944B (en) * | 2019-12-19 | 2022-05-31 | 武汉森泰环保股份有限公司 | Culture method of anaerobic granular sludge |
| CN111138055A (en) * | 2020-01-10 | 2020-05-12 | 重庆市环卫集团有限公司 | Method for cultivating high-temperature anaerobic granular sludge for kitchen waste treatment |
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Application publication date: 20130424 |