CN101948181B - Method for treating thick oil sewage and application of thermophile bacteria in method - Google Patents
Method for treating thick oil sewage and application of thermophile bacteria in method Download PDFInfo
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- CN101948181B CN101948181B CN2009100930847A CN200910093084A CN101948181B CN 101948181 B CN101948181 B CN 101948181B CN 2009100930847 A CN2009100930847 A CN 2009100930847A CN 200910093084 A CN200910093084 A CN 200910093084A CN 101948181 B CN101948181 B CN 101948181B
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Abstract
The invention discloses a method for treating thick oil sewage, which adopts a thermophile bacterium agent to treat the thick oil sewage, wherein the thick oil sewage is sewage directly discharged outwards during an oil extraction process. The method preferably comprises the following steps of: (1) loading the thermophile bacterium agent on a packing material, wherein the thermophile bacterium agent comprises one or a plurality of thermophile bacteria; (2) placing the thick oil sewage and the thermophile bacterium agent loaded on the packing material in a reaction unit together; and (3) completing the treatment of the thick oil sewage when the thick oil sewage in the reaction unit reaches the emission standard. In addition, the invention discloses an application of thermophile bacteria in the high-temperature thick oil sewage. The technical scheme of the invention has the advantages of simple sewage treatment process and low cost.
Description
Technical field
The present invention relates to sewage treatment area, particularly a kind of method that is used for the thermophile bacteria of condensed oil sewage processing and utilizes this thermophile bacteria processing condensed oil sewage.
Background technology
Viscous crude is the crude oil that bituminous matter and gum level are higher, viscosity is bigger, usually the ground area density greater than 0.943, underground viscosity viscous crude, because the density of viscous crude is big, also is called heavy oil greater than the crude oil of 50 centipoises usually.In oilfield explorating developing process, can produce a large amount of oil-field thick-oil sewage, as when crude oil water content reaches 80%, the condensed oil sewage amount will be above 3000 * 10
4Ton.Adopt the mode of steam stimulation or steam driving exploitation mostly at China's heavy oil development; This just must have a large amount of oily(waste)waters to produce, and China four big viscous crude production bases (comprising Liaohe Oil Field, Shengli Oil Field, Zhongyuan Oil Field and Xinjiang Oilfield) are produced the condensed oil sewage amount per year and reached 2340 * 10
4Ton, and along with the change of heavy crude heat extraction mode and the increase of the exploitation time limit, the condensed oil sewage amount is also in rapid rising.
Because condensed oil sewage profit density difference is little, separation difficulty.The method of both at home and abroad condensed oil sewage rationally being disposed at present has four kinds: the first is done advanced treatment with it, is back to injection boiler; It two is on the basis of oil removing process, increases biochemical treatment, qualified discharge; It three is that it outer is transported to contiguous thin oil district, handles qualified re-injection afterwards; It four is to select suitable stratum, utilizes disused well to recharge the stratum, the temporary transient storage.All there is long processing period in first three methods, the defective of complex process, and the 4th kind of in fact inreal handling problem that solves condensed oil sewage of method.Wherein, Second kind is adopted the method for biochemical treatment is to handle the main stream approach of condensed oil sewage at present; Like the microbiobacterial agent that is used for condensed oil sewage processing under the normal temperature of record among the Chinese patent document CN1990854 (A), the effectively organic pollutant of difficult degradation in the degrade viscous crude oil sewage.But in the process of heavy crude producing, often temperature is brought up to 70～80 ℃ for reducing viscosity of crude; After the extraction viscous crude process oil removal technology, outer temperature at discharging condensate can make mikrobe be in the best growing environment still up to 60～70 ℃ in order to ensure the sewage temperature that gets into biochemical treatment; Objectionable impurities in the efficient degradation sewage; Sewage will get into the cooling of high temp glass steel cooling tower, and its sewage temperature that gets into biochemistry pool is reduced to below 45 ℃, simultaneously because the outer draining water yield is big; The pressure cost that cools is higher, brings big difficulty for conventional biological treatment.
Along with the development of thermophile bacteria research,, utilize the sewage of (more than 50 ℃) under the thermophile bacteria processing comparatively high temps more and more to cause people's attention because it has advantages such as the high microorganism down of biodegradation rate, comparatively high temps faster is active, sludge yield is few.As disclosing a kind of treatment process of organic waste water among the Chinese patent document CN1663919 (A); Wherein utilize thermophile bacteria that the mud that produces in the treating processes is carried out solubilisate; But the mud of handling in this prior art mainly results from the waste water that produces in the daily life production; Its staple is biomass cells or simple organism; That is to say for the survival environmental facies of thermophile bacteria to simply, and contain multiple very deleterious chemical substances such as colloid, pitch, polycyclic aromatic hydrocarbons in the condensed oil sewage that viscous oil recovery produces that these materials are commonly referred to be and can't degrade through thermophile bacteria; Simultaneously again because the biochemical activity of thermophile bacteria very easily receives the influence of surrounding environment, so those skilled in the art can't imagine thermophile bacteria is applied in the field of petroleum exploitation in the condensed oil sewage treating processes.
Summary of the invention
The present invention is in order to overcome defective in the above-mentioned prior art, provides a kind of and adopts thermophilic microbial inoculum to carry out the method that condensed oil sewage is handled, and the application of said thermophile bacteria in handling condensed oil sewage.
The invention provides the method that a kind of condensed oil sewage is handled, adopt thermophilic microbial inoculum to handle said condensed oil sewage, wherein, said condensed oil sewage is the sewage that directly effluxes in the oil recovery process.
In the technique scheme, said method comprises the steps:
(a) thermophilic microbial inoculum is carried on the filler, wherein, said thermophilic microbial inoculum comprises one or more thermophile bacteria, and said thermophilic microbial inoculum preferred package contains two or more thermophile bacteria;
(b) condensed oil sewage and the thermophilic microbial inoculum that is carried on the said filler are placed reaction member jointly;
(c) when condensed oil sewage reaches emission standard described in the said reaction member, promptly accomplish processing to said condensed oil sewage.
In the technique scheme, said step (a) is carried on thermophilic microbial inoculum on the filler, and the volume dosed that adds said thermophilic microbial inoculum accounts for the 1-10% of said packing volume, is preferably 3-5%; Wherein, said thermophilic microbial inoculum comprises one or more thermophile bacteria, and said thermophilic microbial inoculum preferred package contains two or more thermophile bacteria;
Said step (b); Condensed oil sewage and the thermophilic microbial inoculum that is carried on the said filler are placed reaction member jointly; Wherein, Said condensed oil sewage is meant outer sewage of discharging after in viscous oil recovery process extraction viscous crude is through oil removal technology, and this condensed oil sewage needn't carry out the cooling processing in any traditional technology, directly gets into the reaction member that is used for handling condensed oil sewage among the present invention and contacts with thermophile bacteria; According to the character of condensed oil sewage and the temperature of sewage, the difference of reaction member is set, the total hydraulic detention time of condensed oil sewage described in the said reaction member is 18 to 24 hours;
Said step (c) is accomplished the processing to said condensed oil sewage when condensed oil sewage reaches emission standard described in the said reaction member.Generally, said condensed oil sewage can reach emission standard after in reaction member, intaking and stablizing 1-10 days (promptly from getting into reaction member to the time period of discharging reaction member).When the initial COD value of the water inlet of condensed oil sewage is 400mg/L; The COD of water outlet is during less than 120mg/L; Then reach the national secondary emission standard; Certainly possibly there is difference in the emission standard of different zones, as long as detected COD promptly thinks and accomplishes the treating processes to condensed oil sewage to changing when reaching corresponding emission standard.
In the technique scheme; Need not process that reaction member is heated or lowered the temperature; Mainly be since directly the temperature of outer condensed oil sewage of discharging usually at 60 ℃-70 ℃; Thermophilic microbial inoculum biochemical activity under this temperature is higher, therefore can reach the purpose of degradation treatment condensed oil sewage, so corresponding preferred biochemical activity temperature is 50 ℃-75 ℃ thermophile bacteria.
In the technique scheme; Owing to need to add chemical agents such as emulsion splitter, tensio-active agent and whipping agent in the oil recovery process usually; And these medicaments can cause disadvantageous effect to thermophile bacteria degradation treatment condensed oil sewage; Total content through experiment showed, the chemical agents such as colloid, pitch, polycyclic aromatic hydrocarbons, emulsion splitter, emulsion splitter and whipping agent in said condensed oil sewage is not higher than 100mg/L, and it is stronger that thermophilic microbial inoculum is handled the condensed oil sewage ability; When chemical agent is higher than 100mg/L in the condensed oil sewage, the ability that thermophilic microbial inoculum is handled condensed oil sewage will decrease.
In the technique scheme; Said thermophile bacteria is stearothermophilus ground bacillus, thermal capacitance genus bacillus or thermophilic molten born of the same parents' soil genus bacillus; The active temperature of these thermophile bacteria is 50 ℃-75 ℃, can carry out biochemical treatment to sewage under without the condition of any cooling measure at condensed oil sewage.Thermophilic microbial inoculum is that above-mentioned single kind thermophile bacteria or multiple thermophile bacteria form through cultivating among the present invention, and its form can be solid or liquid, and the process of cultivating thermophilic microbial inoculum is known in the art, so do not give unnecessary details.
In the technique scheme, said reaction member is made up of the plural serial stage reaction tank, preferably is made up of three grades of cascade reaction ponds.
In the technique scheme, the mode that said reaction tanks at different levels all adopt acidication technology or all adopt contact oxidation technology or adopt acidication technology and contact oxidation technology to combine, preferred reaction tanks at different levels all adopt contact oxidation technology.
In the technique scheme; In the said step (a); Said filler is one or more in blast-furnace slag filler, honeycomb filler, three-dimensional ripple packing, Ball-type packing, fiber soft-filler, semi soft packing, elastic solid filler, modified version elastic stereo, haydite, fibrous nodules, shell filtrate, the manganese sand filtering material; The main effect of these fillers is to be used for the load thermophile bacteria, and nutritive substance is provided, keeps its biochemical activity for thermophile bacteria.
In the technique scheme, the pH value of condensed oil sewage is controlled to be 7-8 in the said reaction member.
In the technique scheme; In the said step (b), said reaction member is connected with aerating apparatus, when under aerobic conditions; In the unit of said reaction, oxygen is provided through said aerating apparatus, can certainly be directly exposed to condensed oil sewage is contacted with airborne oxygen; Through whipping appts said condensed oil sewage is stirred.
The present invention provides another technical scheme to do, the application of thermophile bacteria in the heavy crude sewage water treating method described in the technique scheme.
The present invention has following beneficial effect:
(1) the present invention overcomes technological prejudice; Thermophile bacteria is used in the condensed oil sewage treating processes first; Adopt the biochemical activity temperature and directly efflux the condensed oil sewage temperature thermophile bacteria that adapts condensed oil sewage is handled; Because thermophile bacteria can handle sewage under comparatively high temps (common 50 ℃-75 ℃), thereby make in the viscous oil recovery process efflux wastewater, directly under comparatively high temps, just can get in the reaction member among the present invention and contact with thermophile bacteria without any need for the cooling treatment measures; Carry out WWT, thereby the cost of avoiding causing owing to temperature-fall period in the traditional technology increases.
(2) in a preferred implementation,, adopt condensed oil sewage and the method that is carried on the thermophile bacteria joint on the filler can be reached the COD that reduces sewage effectively and the purpose of oil-contg through a large amount of experiment confirms.Need not to use the equipment of complicated power consumption in the entire treatment process, and the process of processing condensed oil sewage is very simple, reduces the cost of condensed oil sewage treatment facility.
(3) in another preferred implementation, reaction member preferably adopts the reaction of high order pond, places one or more thermophile bacteria in each reaction tank, thereby improves the degradation capability of thermophile bacteria; And through the experiment proof; When the reaction tanks at different levels in the reaction member all adopted contact oxidation technology, the condensed oil sewage treatment effect was best, and total hrt is 18-24 hour in the reaction member; When the condensed oil sewage water inlet stabilizes to ten days; COD value average removal rate reaches as high as more than 80% in the sewage, degradation cycle in the traditional technology, and the cycle of disposing of sewage among the present invention obviously shortens.
Description of drawings
Fig. 1 passes through the change curve that thermophilic microbial inoculum is handled the COD of sewage of front and back in the checking example 1;
Fig. 2 passes through the change curve that thermophilic microbial inoculum is handled the sewage oil-contg of front and back in the checking example 1;
Fig. 3 is through oil component chromatogram scanning of the mass spectrum total ion current figure in the condensed oil sewage before the thermophilic microbial inoculum processing of mixing in the checking example 2;
Fig. 4 handles oil component chromatogram scanning of the mass spectrum total ion current figure in the condensed oil sewage of back through mixing thermophilic microbial inoculum in the checking example 2;
Fig. 5 verifies in the example 2 to handle the normal paraffin component content graphic representation of oil component in the condensed oil sewage of front and back through mixing thermophilic microbial inoculum;
Fig. 6 verifies in the example 2 to handle the aromatic component content graphic representation of oil component in the condensed oil sewage of front and back through mixing thermophilic microbial inoculum;
Fig. 7 is that thermophilic microbial inoculum is handled the condensed oil sewage schematic flow sheet among the embodiment 1 to 3;
Fig. 8 is the column diagram that thermophilic microbial inoculum is handled the clearance of COD in the sewage of back among the embodiment 1 to 3 to the condensed oil sewage that contains emulsion splitter LPR-II;
Fig. 9 is the column diagram that thermophilic microbial inoculum is handled the clearance of COD in the sewage of back among the embodiment 1 to 3 to the condensed oil sewage that contains emulsion splitter TR-DEM/LH-V;
Figure 10 is the column diagram that thermophilic microbial inoculum is handled the clearance of COD in the sewage of back among the embodiment 1 to 3 to the condensed oil sewage that contains whipping agent FPJ.
Embodiment
Below in conjunction with checking example, embodiment and respective drawings, specific embodiments of the invention is described in detail, but is to be understood that protection scope of the present invention does not receive the restriction of embodiment.
At first, the present invention can be applied to the condensed oil sewage treating processes through verifying example 1,2 checking thermophile bacteria, and can realize the purpose of degradation treatment condensed oil sewage.The thermophilic microbial inoculum of selecting for use in the checking example is that (Geo (b) is cillus ste (a) rothermophilus (a) for the stearothermophilus ground bacillus; Below represent with GW1), (a) cillus c (a) ldolyticus of thermal capacitance genus bacillus (B); Below represent with GW2), the mix bacterium agent that mixes of thermophilic molten born of the same parents soil genus bacillus (Geo (b) is cillus toe (b) ii (a), below represent) and GW1, GW2 and GW3 with GW3.
Checking example 1
At first prepare to be used to the minimal medium that thermophile bacteria promptly provides nutritive substance and keeps its biochemical activity, the prescription of said inorganic medium is: 2.5g NH
4NO
3, 2.0g N (a) Cl, 1.0g N (a)
2HPO
4, 0.01g FeSO
47H
2O, 0.5g KH
2PO
4, 0.01g C (a) Cl
2, 0.5g MgSO
47H
2O, 0.01g ZnCl
2, 0.2g MgCl
26H
2O, zero(ppm) water 1L, the pH value of said inorganic medium is 7.0-8.0.The sewage that the condensed oil sewage that uses in this checking example provides as CNPC environmental engineering center, its original ph are 8.0-8.2, and initial oil-contg is 103-107mg/L, and initial COD (chemical oxygen demand COD) is 415-431mg/L.
The laboratory proofing method that thermophilic microbial inoculum is handled condensed oil sewage is: prepare four 250mL triangular flasks respectively and cultivate; In each triangular flask, add 135mL condensed oil sewage and 25mL minimal medium; In each triangular flask that condensed oil sewage and minimal medium are housed, add the mix bacterium agent of thermophilic microbial inoculum GW1, GW2, GW3 and 1: 1: 1 by volume blended three strain bacterium more respectively, wherein the volume ratio of thermophilic microbial inoculum and inorganic medium is 5% in each bottle.65 ℃, 150r/min shaking culture (being the process of the actual condensed oil sewage of simulation process); Respectively 0,2h (hour), 5h, 10h, 18h, 25h, 36h and the COD of 48h sampling and measuring condensed oil sewage and the variation of oil-contg confirm the treatment effect of thermophile bacteria to condensed oil sewage, COD adopts the fast tacheometer of 5 (B)-3 (d) type COD to measure.
Change curve for the COD of sewage before and after handling through thermophilic microbial inoculum shown in Figure 1, wherein, X-coordinate is for handling the time of condensed oil sewage, and ordinate zou is the COD value of sewage.Visible from Fig. 1, the initial COD of sewage that GW1, GW2, GW3 and mix bacterium agent are handled is respectively 423.5mg/L, 415.6mg/L, 431.2mg/L, 425.6mg/L.After cultivating 48h; The COD value of disposing of sewage is reduced to 134.5mg/L, 154.6mg/L, 187.6mg/L and 62.7mg/L respectively; The clearance of COD of sewage is respectively 68.24%, 62.8%, 56.49% and 85.27%, and the effect of the processing condensed oil sewage of visible mixed bacterium is superior to single bacterial strain.
Change curve for the sewage oil-contg before and after handling through thermophilic microbial inoculum shown in Figure 2, wherein, X-coordinate is for handling the time of condensed oil sewage, and ordinate zou is the oil-contg of sewage.Visible from Fig. 2, the initial oil-contg that GW1, GW2, GW3 and mixed bacterium are disposed of sewage is respectively 105.3mg/L, 107.1mg/L, 103.6mg/L, 104.5mg/L; After cultivating 48h; The oil-contg of disposing of sewage is respectively 22.10mg/L, 14.3mg/L, 13.6mg/L and 11.3mg/L; Degradation rate to crude oil is respectively 79.0%, 86.6%, 86.9% and 89.2%, and mixed bacterium is better than single bacterial strain slightly to the degradation effect of oil component in the sewage.
Checking example 2
At first prepare to be used to the minimal medium that thermophile bacteria promptly provides nutritive substance and keeps its biochemical activity, the prescription of said inorganic medium is identical with checking example 1.Prepare a triangular flask; In bottle, add the 50mL minimal medium; 50mg crude oil; In the triangular flask that condensed oil sewage and minimal medium are housed, add volume ratio again and be 1: 1: 1 by GW1, GW2, GW3 three strain thermophile bacteria blended mix bacterium agents, wherein the volume ratio of mix bacterium agent and inorganic medium is 6%.After three days, use CCl at 65 ℃, 150r/min shaking culture
4Oil component in the extraction sewage.
Adopt look-mass spectrometry (GC-MS) that the variation of using mix bacterium agent to handle oil component in the condensed oil sewage of front and back is analyzed.Wherein the GC-MS operative norm is G (B)/T18606-2001, " the gaschromatographic mass spectrometry method is measured biomarker in settling and the crude oil "; Use instrument to be Thermo-Finnig (a) n Tr (a) ce-DSQ GC-MS.Test condition is: the chromatogram carrier gas is 99.999% helium; 300 ℃ of injector temperatures; 300 ℃ of transmission line temperature; Chromatographic column is HP-5MS elastic quartz capillary column (60m * 0.25mm * 0.25 μ m); Column temperature: 80 ℃ of 1min of initial temperature (working conditions of chromatographic column); Be warming up to 270 ℃ with 15 ℃/min speed, keep 20min; Flow rate of carrier gas is 1mL/min.Mass spectrum EI source, 70eV (ev); Heater current: 100 μ (A); Multiplier voltage: 1200V; Adopt full scan.
Fig. 3 is for handling oil component chromatogram scanning of the mass spectrum total ion current figure in the preceding condensed oil sewage through mixing thermophilic microbial inoculum, and Fig. 4 is for handling oil component chromatogram scanning of the mass spectrum total ion current figure in the preceding condensed oil sewage through mixing thermophilic microbial inoculum.Can know from the GC-MS total ion current figure of Fig. 3, Fig. 4; Bigger change has taken place in oil component in the sewage; Mix bacterium agent shows degradation capability preferably to the most of component in the crude oil; Mix the thermophilic microbial inoculum long chain alkane of degrading easily, after degraded, most alkane is degraded to lower level.Can find out from the contrast of Fig. 3, two spectrograms of Fig. 4, mikrobe to oil degradation, change its component allocation proportion and played certain function.In the short period of time, mikrobe has also played Degradation to the heavier component of crude oil, helps reducing its flowability of viscosity increase of crude oil.Mikrobe all has Degradation to light, heavy hydrocarbons, to the degraded of longer carbochain alkane its chain length is shortened, and long chain hydrocarbon is degraded to than short carbon chain, and this terminal oxidation mechanism with microbiological deterioration alkane is consistent.
Fig. 5 is for handling the normal paraffin component content graphic representation of oil component in the condensed oil sewage of front and back through mixing thermophilic microbial inoculum, and wherein X-coordinate is the carbon number (unit: individual) of normal paraffin in the sewage.Can know by Fig. 5, and compare before the degradation treatment, detected in the middle of carbon number (C16～C25) occupies the majority and forms the advantage of peak value, and the scanning peak of the heavy component of back obviously reduces or disappearance.Also see simultaneously, detectedly reduce to some extent than the light-weight hydro carbons.
Fig. 6 is for handling the aromatic component content graphic representation of oil component in the condensed oil sewage of front and back through mixing thermophilic microbial inoculum, and wherein, X-coordinate is the aromatic component (being respectively pristane, phytane, naphthalene, phenanthrene) of oil component in the condensed oil sewage.Can know that by Fig. 6 mixed bacterium also has degraded to a certain extent to these aromatic hydrocarbon,, the content of the aromatic hydrocarbon of condensed oil sewage reduced so the proof thermophile bacteria also can be that carbon source is carried out Metabolic activity with aromatic hydrocarbon.
As shown in Figure 7, the device that utilizes thermophilic microbial inoculum to handle condensed oil sewage in the present embodiment comprises reaction member, whipping appts and aerating apparatus (have only and just use this device in the time of need aerobic condition being provided).Adopt combined stuffing (for the commercially available prod) to hang film in each reaction tank, through hanging film thermophile bacteria is loaded on the filler, the volume dosed of said thermophilic microbial inoculum accounts for the 3-5% of said packing volume.Wherein, hang membrane technique and be well known to those skilled in the art, so do not give unnecessary details.
Wherein: reaction member, to form by three reaction tanks that are in series, reaction tank is processed with steel material; Whipping appts is used for the agitating reaction pond condensed oil sewage, and it is contacted with thermophile bacteria more fully; Aerating apparatus, (when adopting contact oxidation method) provides oxygen through aerating apparatus in the reaction tank when reaction tank is aerobic condition.Need to prove; In the present embodiment in order to simulate the temperature that effluxes condensed oil sewage in the actual oil recovery process; Be controlled at about 65 ℃ through temperature regulating device control first reaction tank (reaction tank 1) temperature during experiment; Second reaction tank (reaction tank 2) temperature is controlled at about 60 ℃, and the 3rd reaction tank (reaction tank 3) temperature is controlled at about 55 ℃; And during the condensed oil sewage in the processing reality,, therefore need not to use temperature regulating device that condensed oil sewage is carried out temperature adjustment because the temperature of the condensed oil sewage that directly effluxes is 60 ℃-70 ℃.
Table 1
To the condensed oil sewage that contains emulsion splitter LPR-II from intake stable after, carry out continuous seven days monitoring, and contain the COD changing conditions of emulsion splitter LPR-II condensed oil sewage after obtaining among the embodiment 1 to 3 handling through different process, see table 2 for details.
Table 2
| Embodiment | The COD value (mg/L) of water inlet place condensed oil sewage | The COD value (mg/L) of water outlet place condensed |
| Embodiment | ||
| 1 | 486.00-894.72 | 65.28-111.36 |
| Embodiment 2 | 486.00-894.72 | 55.68-92.00 |
| |
486.00-894.72 | 82.56-100.00 |
Can know by the data in the last table 2; The COD of the condensed oil sewage that contains emulsion splitter LRJ-II after adopting treatment process among the embodiment 1 to 3 to degrade basically can qualified discharge, and the average removal rate of the condensed oil sewage COD that embodiment 1,2,3 is corresponding specifically is respectively 85.51%, 89.50%, 85.95%.Fig. 8 is the column diagram that thermophilic microbial inoculum is handled the clearance of COD in the sewage of back among the embodiment 1 to 3 to the condensed oil sewage that contains emulsion splitter LPR-II; Wherein X-coordinate is the steady time of condensed oil sewage between from inlet water to outlet water (unit: day); Ordinate zou is the COD clearance (unit: %) of sewage; Visible by Fig. 8, three kinds of technologies are followed successively by from excellent to bad the condensed oil sewage treatment effect that contains emulsion splitter LPR-II: contact oxidation technology, acidication-contact oxidation technology, acidication technology, from stable first day; COD clearance in the condensed oil sewage both can reach higher level; And As time goes on, the COD of sewage clearance does not have obvious variation, maintains higher level basically.
Need to prove; Hydraulic detention time in the reaction tank described in the table 1 is a notion well-known to those skilled in the art; The index of condensed oil sewage ability is handled in its reflection, and hydraulic detention time is long more, and sewage treatment capacity is more little; Hydraulic detention time is short more; Sewage treatment capacity is big more, and it is the investigation result that the thermophile bacteria of GW1 in the his-and-hers watches 1, GW2, GW3 various combination is handled the condensed oil sewage effect, and hydraulic detention time mainly changes according to the difference of reaction tank progression in the temperature of the character of condensed oil sewage, sewage and the reaction member.Among the present invention, in reaction tank the hydraulic detention time of condensed oil sewage more in short-term, the organism in the sewage can not fully be degraded; And when hydraulic detention time is long; The material that suppresses thermophile bacteria growth survival in the sewage increases, and can influence the effect that thermophile bacteria is disposed of sewage, through repeated validation; Among the present invention in the reaction tanks at different levels the hydraulic detention time of condensed oil sewage be preferably 6-8 hour, the total hydraulic detention time of reaction member is preferably 18-24 hour.
In addition; The filler that is used to support thermophilic microbial inoculum in the foregoing description is not limited to combined stuffing; Also can be in blast-furnace slag filler, honeycomb filler, three-dimensional ripple packing, Ball-type packing, fiber soft-filler, semi soft packing, elastic solid filler, modified version elastic stereo, haydite, fibrous nodules, shell filtrate, the manganese sand filtering material one or more, the combined stuffing that preferably adopts multiple above-mentioned filler combination to form.These fillers are the commercially available prod, in the process of handling condensed oil sewage, need not any special processing, promptly can be used as the carrier filler of thermophile bacteria, and reach the purpose of handling condensed oil sewage among the present invention.
Adopt the device of the processing condensed oil sewage identical with embodiment 1 to 3, only to the condensed oil sewage that will handle change, contain emulsion splitter TR-DEM/LH-V in the simulation condensed oil sewage of employing among the embodiment 4 to 6, chemical content is 100mg/L.Wherein, embodiment 4 is identical with processing parameter among the embodiment 1, and embodiment 5 is identical with processing parameter among the embodiment 2, and embodiment 6 is identical with processing parameter among the embodiment 3.
To the oily(waste)water that contains emulsion splitter TR-DEM/LH-V from intake stable after, carry out continuous seven days monitoring, and contain the COD changing conditions of emulsion splitter TR-DEM/LH-V condensed oil sewage after obtaining among the embodiment 4 to 6 handling through different process, see table 3 for details.
Table 3
| Embodiment | The COD value (mg/L) of water inlet place condensed oil sewage | The COD value (mg/L) of water outlet place condensed |
| Embodiment | ||
| 4 | 433.92-474.24 | ?49.94-132.48 |
| |
433.92-474.24 | ?34.56-61.44 |
| |
433.92-474.24 | ?34.56-84.48 |
Can know by the data in the last table 3; After treatment process among the employing embodiment 4 to 6 is degraded; The COD of condensed oil sewage all has significantly decline, and the average removal rate of the condensed oil sewage COD of embodiment 1,2,3 correspondences is respectively 79.66%, 86.98%, 85.43% specifically.That treatment effect is best is the embodiment 5 that adopts contact oxidation technology; And adopt the result of 4 pairs of TR-DEM/LH-V sewage of acidication implementation of processes example undesirable; After stablizing 7 days, still can not guarantee the sewage qualified discharge; But if behind the hydraulic detention time of proper extension acidication technology, then can make the condensed oil sewage qualified discharge.
Embodiment 7 to 9
Adopt the device of the processing condensed oil sewage identical with embodiment 1 to 3, only to the condensed oil sewage that will handle change, contain whipping agent FPJ in the simulation condensed oil sewage of employing among the embodiment 7 to 9, chemical content is 100mg/L.Wherein, embodiment 7 is identical with processing parameter among the embodiment 1, and embodiment 8 is identical with processing parameter among the embodiment 2, and embodiment 9 is identical with processing parameter among the embodiment 3.
To the condensed oil sewage that contains whipping agent FPJ from intake stable after, carry out the monitoring of the continuous Ninth Heaven.And contain the COD changing conditions of the condensed oil sewage of whipping agent FPJ after obtaining among the embodiment 7 to 9 handling through different process, see table 4 for details.
Table 4
| Embodiment | The COD value (mg/L) of water inlet place condensed oil sewage | The COD value (mg/L) of water outlet place condensed oil sewage |
| Embodiment 7 | 238.08-750.68 | 57.60-145.04 |
| Embodiment 8 | 238.08-750.68 | 59.52-134.40 |
| Embodiment 9 | 238.08-750.68 | 40.32-112.88 |
Data through last table 4 can find out, adopt treatment process among the embodiment 4 to 6 to degrade after, the average removal rate of the COD of condensed oil sewage is respectively 77.08%, 77.81%, 80.18%, can realize significantly reducing the purpose of the COD of sewage equally.
It is thus clear that after condensed oil sewage was handled through the method for embodiment 1 to 9, the COD of sewage clearance all reached on 70%, meets the national secondary emission standard.
The emulsion splitter LPR-II, emulsion splitter TR-DEM/LH-V, the whipping agent FPJ that add in the simulation condensed oil sewage in the foregoing description are normally used chemical agents in the oil production, and this is the employed PIN of the industry, is the commercially available prod.
Certainly; According to concrete emission standard; Can the number of reaction tank in the reaction member in the above-mentioned preferred embodiment 1 to 9 be increased and decreased; The time that perhaps condensed oil sewage is stopped in reaction tanks at different levels increases and decreases accordingly; The technology that also can select each reaction tank as required is acidication technology or contact oxidation technology (promptly changing the aerobic or anaerobic condition of reaction tank), to those skilled in the art according to the variation tendency of the experimental data in the above-mentioned embodiment, selects in suitable reaction tank quantity, each reaction tank condensed oil sewage hydraulic detention time or reaction tank processing condition not to have difficulties.In addition,, thermophilic microbial inoculum volume dosed all can realize effective degraded through experiment showed, in a large number when accounting for the 1-10% of said packing volume to condensed oil sewage; Under the same conditions; For preferable range 3-5%, thermophile bacteria compares less than 3% or greater than 5% o'clock with packing volume, and thermophilic microbial inoculum reduces the processing power of condensed oil sewage relatively; But total hrt is 18-24 hour in reaction member; The condensed oil sewage water inlet stabilizes to one to ten day, and COD value average removal rate is more than 70% in the sewage, all reaches the national secondary emission standard.
More than disclosedly be merely a specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (12)
1. the treatment process of a condensed oil sewage, be characterised in that: adopt thermophilic microbial inoculum that said condensed oil sewage is handled, said condensed oil sewage is the sewage that directly effluxes in the oil recovery process; Wherein, said thermophilic microbial inoculum comprises one or more thermophile bacteria, and said thermophile bacteria is stearothermophilus ground bacillus, thermal capacitance genus bacillus or thermophilic molten born of the same parents' soil genus bacillus.
2. method according to claim 1 is characterized in that: said method comprises the steps:
(a) thermophilic microbial inoculum is carried on the filler;
(b) condensed oil sewage and the thermophilic microbial inoculum that is carried on the said filler are placed reaction member jointly;
(c) when condensed oil sewage reaches emission standard described in the said reaction member, promptly accomplish processing to said condensed oil sewage.
3. method according to claim 2 is characterized in that:
In the said step (a), the volume dosed of said thermophilic microbial inoculum accounts for the 1-10% of said packing volume;
In the said step (b), the total hydraulic detention time of condensed oil sewage described in the said reaction member is 18 to 24 hours.
4. method according to claim 3 is characterized in that:
In the said step (a), the volume dosed of said thermophilic microbial inoculum accounts for the 3-5% of said packing volume.
5. method according to claim 2 is characterized in that: said reaction member is made up of one or more levels cascade reaction pond.
6. method according to claim 2 is characterized in that: said reaction member is made up of three grades of cascade reaction ponds.
7. method according to claim 2 is characterized in that: said reaction member adopts acidication technology or adopts contact oxidation technology or adopt acidication-contact oxidation technology.
8. according to any described method of claim 2 to 7; It is characterized in that: in the said step (a), said filler is one or more in blast-furnace slag filler, honeycomb filler, three-dimensional ripple packing, Ball-type packing, fiber soft-filler, semi soft packing, elastic solid filler, haydite, shell filtrate, the manganese sand filtering material.
9. according to any described method of claim 2 to 7, it is characterized in that: in the said step (a), said filler is one or more in modified version elastic solid filler, the fibrous nodules.
10. according to any described method of claim 2 to 7, it is characterized in that: the pH value of condensed oil sewage is controlled to be 7-8 in the said reaction member.
11. according to any described method of claim 2 to 7, it is characterized in that: in the said step (b), said reaction member is connected with aerating apparatus; Through whipping appts said condensed oil sewage is stirred.
12. thermophile bacteria requires the application in any described heavy crude sewage water treating method of 1-11 at aforesaid right.
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| CN114105398A (en) * | 2020-08-31 | 2022-03-01 | 中国石油化工股份有限公司 | Device and method for treating petrochemical wastewater by high-temperature fluid bed biochemical system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614006A (en) * | 2004-11-17 | 2005-05-11 | 南开大学 | Thermophilic denitrifying bacillocin, screening and use thereof |
| CN1990854A (en) * | 2005-12-27 | 2007-07-04 | 中国科学院沈阳应用生态研究所 | Microorganism bacterium agent for processing thick oil sewage and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1614006A (en) * | 2004-11-17 | 2005-05-11 | 南开大学 | Thermophilic denitrifying bacillocin, screening and use thereof |
| CN1990854A (en) * | 2005-12-27 | 2007-07-04 | 中国科学院沈阳应用生态研究所 | Microorganism bacterium agent for processing thick oil sewage and preparation method thereof |
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