CN105585112A - Preparation method for aerobic granular sludge - Google Patents
Preparation method for aerobic granular sludge Download PDFInfo
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- CN105585112A CN105585112A CN201510904849.6A CN201510904849A CN105585112A CN 105585112 A CN105585112 A CN 105585112A CN 201510904849 A CN201510904849 A CN 201510904849A CN 105585112 A CN105585112 A CN 105585112A
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- sludge
- activated sludge
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- amidino groups
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention belongs to the technical field of water treatment, and particularly relates to a preparation method for aerobic granular sludge. The preparation method comprises the steps that firstly, activated sludge in a secondary settling pond is pumped out, then a proper quantity of guanyl containing positive ion macromolecular chemical agent is added into the activated sludge, stirring or fully aeration mixing is carried out, and the needed granular activated sludge can be formed within 30 min. The preparation method has the advantages that compared with the activated sludge, the granular sludge formed by adding a screened guanyl compound is good in settling property, settling time is saved, meanwhile, the biological activity of the sludge is not affected by the added chemical agent, and the efficiency of a waste water treatment system can be improved. According to the method, the pelleting speed for generating the granular sludge is high, the period is short, the system is stable, and the granular sludge can be fast used for engineering practice.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to the preparation method of the granule sludge in a kind of wastewater treatment.
Background technology
Along with social high speed development, the ever-increasing living needs of people has also brought new problem to environment in satisfied. The sewage disposal total amount in city constantly increases. Present most sewage treatment process all adopts activated sludge process, this technique has also been brought the treatment and disposal problem of mud in processing municipal wastewater preferably, the urban land that the secondary pollution that sludge incineration brings and Sludge landfill take, makes sludge treatment become a difficult problem. On the other hand, the percolate of some chemical industry, dyeing and refuse landfill etc. all belongs to complicated component, waste water that intractability is higher, even, containing poisonous and harmful substance, traditional activated sludge process water treatment technology is difficult to meet the processing requirements of highly difficult sewage.
The granule sludge technology of sewage is that the eighties in last century is found first in anaerobic system, and researcher finds that anaerobic grain sludge has extremely strong treatment of Organic Wastewater ability, can be applicable to alcohol waste water, starch wastewater and beer waste water etc. multi-field. But anaerobic grain sludge has more weak point in the time processing waste water, for example the start-up time of anaerobic grain sludge technique is longer, process operation need to be under middle temperature (30 DEG C) condition, and in the more difficult use in the severe area of natural environment, generally maintaining technique needs larger energy consumption.
Aerobic Granular Sludge Technology, the high-effect waste water treatment process that a kind of sludge concentration is higher arose at the historic moment in last century end. Aerobic particle mud technique has following advantage compared to activated sludge process water treatment technology: (1) has good settling property, can improve sludge concentration and the load of reactor; (2) grain structure is closely knit, and mithridatism is stronger, has improved disposal ability and the stability of system; (3) shorter than the start-up period of anaerobic grain sludge, can cultivate at normal temperatures and move; (4) low concentration and high-concentration waste water are had to certain removal effect; (5) there is stronger denitrogenation dephosphorizing ability.
But, the condition of culture complexity of aerobic particle mud at present, required time is long, and be not easy cultivation in enormous quantities, even if be also subject to larger restriction in laboratory scope, its main cause has two: one, in former water easily by the higher situation of the content of organics of biological oxidation, in granule sludge, the yield coefficient of microorganism is higher, can cause the disintegration of granule sludge, thereby aerobic particle mud is generally cultivated in the sewage disposal of more difficult biochemistry at present, or add some Toxics to reduce the yield coefficient of microorganism in the process of cultivating aerobic particle mud, to maintain the granulating state of mud, its two be cultivate granule sludge because particle diameter is related to that the gradient of granule interior dissolved oxygen is inhomogeneous, cause the inner anaerobism of granule sludge and mud granule is disintegrated, above-mentioned reason causes Aerobic Granular Sludge Technology to be difficult to exert advantages of oneself, and is fully applied in the middle of Practical Project.
Research shows, in activated sludge, adds chemical agent, can change activated sludge structure, increase the density of flco, improve settling property and the dewatering of mud. As Li Jiuyi etc. delivers in September, 2003 ESEM that proposes mud flco in being entitled as " impact of Fe (ó) on activated sludge flco structure and biological flocculation " in " ACTA Scientiae Circumstantiae ", to show that Fe (ó) diminishes activated sludge floc particle closely knit; And Zhu Zhe etc. in " environmental project journal ", publish an article in April, 2009 water inlet is proposed in " the effect research of Ca (II) in active sludge biological flocculation " in Ca2+Add, increased particle diameter and the density of mud flco, and then improved the settling property of mud; But above-mentioned article is not mentioned the activity of mud and whether is received inhibition. Zhao Chunlu etc. publish an article in " environmental project " in October, 2000 in " aluminium flocculating agent to Microbial Communities in Activated Sludge activity influence research " and show, aluminum salt flocculant has acute negative effect to the activity of activated sludge. At present, for cation, the explanation such as electric double layer theory and adsorption bridging theory is used in the effect in bioflocculation conventionally.
In active sludge processing system, the medicament adding is mainly molysite, aluminium salt, calcium salt (or lime) and high molecular flocculant PAM etc. at present. The interpolation of the compounds such as flocculant and addition thereof are to dephosphorization, the settling property that improves activated sludge and treatment effeciency important. Scholar's the research of Tsing-Hua University and Japan shows, in activated sludge process, add medicament, kind and quantity to activated sludge in system all have a significant effect. Add medicament, on the one hand to particularly TP of water pollutant, there is good reduction effect, on the other hand, impel falling sharply of biological species, cut down biochemical action, the activated sludge process that adds chemical agent has weakened the biochemical reaction of system and has strengthened physical reaction, such one increases and one subtracts, and makes to add in the removal of medical method BOD5 in aerobic and anaerobic organism system effect not too significantly or has cut down treatment effeciency, and only the removal of TP being had to remarkable effect. Thereby up to the present, the activated sludge technical research that adds medical method is more, but only there is little industrial applications demonstration project, and concentrate in the use of inorganic salts flocculant.
Summary of the invention
The object of the present invention is to provide a kind of granulation speed fast, the preparation method of the aerobic particle mud of short and system stability of cycle.
The preparation method of aerobic particle mud provided by the invention, is to use chemical method to make granular sludge, and concrete steps are as follows:
(1) activated sludge in secondary sedimentation tank is extracted out;
(2) in activated sludge, add the cationic polymeric compound that contains in right amount amidino groups, stir or abundant aeration, it is mixed, in 30min, can form needed seed activity mud.
In the present invention, described in contain amidino groups cationic polymeric compound, its molecular weight is less than 1,000,000, contains amidino groups (HN=CNH2) in molecular structure. Add the method for the cationic polymeric compound that contains amidino groups to be, amidino groups organic matter is mixed with water, be configured to weight concentration and be 0.05% ~ 0.5% mixing material, directly add in activated sludge. For the weight of activated sludge, amidino groups organic matter addition is the more than 2/10000ths of mud butt, can produce effect. In general, addition is the bigger the better, but addition many can to affect activity and the cost of mud higher. Normally, amidino groups organic matter addition is one of 2/10000ths-percentage of mud butt.
In the present invention, described amidino groups organic matter preferably polyethylene amidine compound.
The present invention has chosen inorganic ferric trichloride, organic cation PAM cation emulsion and has contained amidino groups (HN=CNH2) organic polyhydroxyl compound and tested relatively in research process, in the activated sludge of equal quality, add above-mentioned chemical agent, relatively biological degradation activity and the settling property thereof of above-claimed cpd to mud. Result of study as depicted in figs. 1 and 2. As shown in Figure 1, ferric trichloride, organic cation PAM cation emulsion and contain amidino groups (HN=CNH2) organic polyhydroxyl compound and all can improve the settling property of mud, its effect of settling is compared as follows: amidino groups flocculation granule sludge > the PAM granule sludge that flocculate > the molysite granule sludge that flocculates > activated sludge. Observation can find, inorganic molysite adds after activated sludge, and the floc particle of formation is very little; and PAM adds after activated sludge, the floccule of formation is larger, becomes floating shape; and the granular sludge conglomeration that organic polymer amidino compounds forms is better, thereby settling property the best.
In order to judge whether the machine polymerization amidino compounds adding has inhibition to the biochemical action of activated sludge, adopt respectively the useless water test of natural pond liquid of the granule sludge degraded pig farm of activated sludge and the formation of machine polymerization amidino compounds, water inlet natural pond liquid is COD500-600mg/L through its concentration of dilution, two kinds of mud carry out respectively the aeration biochemical processing of 8H, test repeats 7 times, and its result as shown in Figure 2.
Can find from Fig. 2, repeat in test at 7 times, activated sludge and organic polymer amidino groups granule sludge all have certain biodegradation to natural pond liquid waste water, wherein amidino groups granule sludge can reach 35% ~ 49% to the clearance of COD in the liquid of natural pond after 8 hours aerations, the clearance higher than activated sludge for COD20% ~ 26% in the liquid of natural pond.
As can be seen here, the interpolation of organic polymer amidino compounds does not affect the biologically active of mud, and on the contrary, being added on of organic polymer amidino compounds improved mud and remove the ability of COD in water to a certain extent.
A kind of compound that promotes active sludge granulation proposing in the present invention, is a kind of cation high molecular organic compound, is characterized in that molecular weight is not more than 3,000,000, contains amidino groups (HN=CNH2) in molecular structure. The method adding is; after being mixed with water, the organic polymer amidino groups organic matter filtering out is configured to concentration and is 0.05% ~ 0.5% liquid; directly add in activated sludge mud, after aeration or stirring certain hour, activated sludge can granulating form granule sludge.
The beneficial effect that the present invention produces is to add the granule sludge forming through the amidino compounds of screening compared to activated sludge, and its settling property is good, has saved the sedimentation time, simultaneously, the chemical agent adding does not affect the biologically active of mud, can improve the efficiency of Waste Water Treatment.
One aspect of the present invention can be reduced the area of activated sludge process adsorption tank or sedimentation basin greatly, on the other hand, the mud of secondary sedimentation tank can be carried out to secondary recycling, utilize the organic polymer amidino compounds of screening that activated sludge is made to cheap aerobic particle mud as biological adsorption agent, add the front end of sewage disposal system, can alleviate the load of follow-up biochemical treatment, improve waste water removal efficiency. In addition, the inventive method can be used for controlling the der Pilz expansion of activated sludge in biological treatment system, and can improve organic clearance in sewage.
Advantage of the present invention is:
(1) the present invention, compared with traditional activated sludge process, can save floor space and the investment etc. of sewage disposal system;
(2) the present invention takes full advantage of the activated sludge of getting rid of in traditional activated sludge process technique, can make the adsorbent of sewage disposal after granulating, and the energy-saving and cost-reducing effect of system expense has to give up;
(3) it is fast that this method produces the granulation speed of granule sludge, and short and system stability of cycle, can be used in engineering practice fast.
Brief description of the drawings
Fig. 1 is that the settling of granular sludge that different flocculants form compares curve.
Fig. 2 is activated sludge and the removal effect comparison of amidino groups granule sludge to COD.
Detailed description of the invention
The invention is further illustrated by the following examples.
Embodiment 1
Qu Mou sewage treatment plant concentration basin mud, moisture content is 98%, the concentration that adds polyethylene amidine in mud is 0.04g/L, granulation mud after stirring 15min. Getting sanitary sewage that certain Sewage Plant enters factory, to record its COD be 358mg/L, add respectively aeration 15min precipitation after the activated sludge of equal quality and granule sludge, get that supernatant records activated sludge and granule sludge is respectively 34% and 46% to the clearance of sanitary sewage COD, granule sludge is better than activated sludge to the adsorption effect of COD, and granule sludge gets final product sedimentation in 5min.
Embodiment 2
Be that concentration is the mixed solution of 0.1% mass ratio polyethylene amidine and water mixed dissolution, Qu Mou sewage treatment plant concentration basin mud, moisture content is 98.5%, the concentration that adds polyethylene amidine in mud is 0.03g/L, granulation mud after stirring 15min. Get the waste water in certain chemical plant, its CODcr is about 20400mg/L, after adding respectively the activated sludge of same quality and granule sludge, be configured to the mixed liquor that CODcr initial concentration is about 7220mg/L, respectively after aeration 15min, record activated sludge and granule sludge the clearance of COD is respectively to 23% and 47%, granule sludge is better than activated sludge to the adsorption effect of COD and TN, and granule sludge gets final product sedimentation in 5min.
Embodiment 3
Get cultivation natural pond its COD of liquid waste water of factory in 1600mg/L left and right, with running water and natural pond liquid stoste configure according to a certain percentage COD be the water sample of about 500-600mg/L as water inlet, relatively activated sludge biochemical system with adopt the biochemical system of the mud granulation mud that polyethylene amidine and moisture content are 98.5% to organic clearance. In two techniques, sludge quality is basic identical, aeration 8h under the condition of water inlet continuously, activated sludge and granule sludge are respectively 25% and 46% for the clearance of COD in the liquid of natural pond, aerobic particle mud is greater than the clearance of activated sludge to the clearance of COD in sewage, and the sedimentation time is far fewer than the sedimentation time of aerobic activated sludge.
Claims (4)
1. a preparation method for aerobic particle mud, is characterized in that concrete steps are:
(1) activated sludge in secondary sedimentation tank is extracted out;
(2) in activated sludge, add the cationic polymeric compound that contains in right amount amidino groups, stir or abundant aeration, it is mixed, in 30min, can form needed seed activity mud.
2. the preparation method of aerobic particle mud as claimed in claim 1, is characterized in that: described cationic polymeric compound, its molecular weight is not more than 3,000,000, contains amidino groups in molecular structure.
3. the preparation method of aerobic particle mud as claimed in claim 2, it is characterized in that: add the method for the cationic polymeric compound that contains amidino groups to be, amidino groups organic matter is mixed with water, be configured to weight concentration and be 0.05% ~ 0.5% mixing material, directly add in activated sludge.
4. the preparation method of the aerobic particle mud as described in one of claim 1-3, is characterized in that: described amidino groups organic matter is selected polyethylene amidine compound.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510904849.6A CN105585112A (en) | 2015-12-09 | 2015-12-09 | Preparation method for aerobic granular sludge |
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| CN201510904849.6A CN105585112A (en) | 2015-12-09 | 2015-12-09 | Preparation method for aerobic granular sludge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106116104A (en) * | 2016-08-18 | 2016-11-16 | 复旦大学 | A kind of method of activated sludge deep dehydration |
| CN108675440A (en) * | 2018-06-14 | 2018-10-19 | 浙江工业大学 | A method of it is prepared by sludge accumulation body and aerobic particle mud is promoted quickly to be formed |
| CN108946954A (en) * | 2018-06-14 | 2018-12-07 | 浙江工业大学 | A method of by being formed, sludge accumulation body quickly controls sludge bulking and energy is steady in a long-term |
| CN113840807A (en) * | 2019-06-10 | 2021-12-24 | 凯米拉公司 | Method for removing dissolved organic compounds from waste water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1930091A (en) * | 2004-03-12 | 2007-03-14 | 西巴特殊化学水处理有限公司 | Dewatering process |
| CN101717145A (en) * | 2009-11-27 | 2010-06-02 | 东南大学 | Ring amidino-polymer flocculant and preparation method thereof |
| CN102502953A (en) * | 2011-11-16 | 2012-06-20 | 上海大学 | Method for accelerating culture of aerobic granular sludge |
| CN102583722A (en) * | 2012-03-12 | 2012-07-18 | 北京化工大学 | Immobilized-cultivation method for aerobic granular sludge |
-
2015
- 2015-12-09 CN CN201510904849.6A patent/CN105585112A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1930091A (en) * | 2004-03-12 | 2007-03-14 | 西巴特殊化学水处理有限公司 | Dewatering process |
| CN101717145A (en) * | 2009-11-27 | 2010-06-02 | 东南大学 | Ring amidino-polymer flocculant and preparation method thereof |
| CN102502953A (en) * | 2011-11-16 | 2012-06-20 | 上海大学 | Method for accelerating culture of aerobic granular sludge |
| CN102583722A (en) * | 2012-03-12 | 2012-07-18 | 北京化工大学 | Immobilized-cultivation method for aerobic granular sludge |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106116104A (en) * | 2016-08-18 | 2016-11-16 | 复旦大学 | A kind of method of activated sludge deep dehydration |
| CN108675440A (en) * | 2018-06-14 | 2018-10-19 | 浙江工业大学 | A method of it is prepared by sludge accumulation body and aerobic particle mud is promoted quickly to be formed |
| CN108946954A (en) * | 2018-06-14 | 2018-12-07 | 浙江工业大学 | A method of by being formed, sludge accumulation body quickly controls sludge bulking and energy is steady in a long-term |
| CN108675440B (en) * | 2018-06-14 | 2021-05-18 | 浙江工业大学 | Method for promoting quick formation of aerobic granular sludge through sludge aggregate preparation |
| CN113840807A (en) * | 2019-06-10 | 2021-12-24 | 凯米拉公司 | Method for removing dissolved organic compounds from waste water |
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Application publication date: 20160518 |