CN101456655A - Method for dissolving biological cell in sludge and use thereof - Google Patents
Method for dissolving biological cell in sludge and use thereof Download PDFInfo
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- CN101456655A CN101456655A CNA2007101795398A CN200710179539A CN101456655A CN 101456655 A CN101456655 A CN 101456655A CN A2007101795398 A CNA2007101795398 A CN A2007101795398A CN 200710179539 A CN200710179539 A CN 200710179539A CN 101456655 A CN101456655 A CN 101456655A
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Abstract
The invention discloses a method for dissolving biological cells in sludge and application thereof. The method for dissolving the biological cells in the sludge comprises: micron bubbles of ozone are introduced into the sludge to dissolve the biological cells in the sludge. The method for dissolving the biological cells in the sludge can be used for sludge reduction; the specific method comprises: the micron bubbles of the ozone are introduced into a sludge solution for sludge reduction. The method greatly improves the dissolution rate of the sludge; the initial sludge concentration is within the range of between 1,500 and 6,000 mg/L; when the addition amount of the ozone (the amount of the ozone introduced into the sludge solution) is between 0.06 and 0.16g O3/g TSS, the COD dissolution rate and solid dissolution rate of the sludge can reach 25 to 50 percent and 15 to 35 percent respectively; the utilization rate of ozone gas is above 99 percent; and the ozone concentration in tail gas can be controlled within the range allowed by emission.
Description
Technical field
The present invention relates to the method and the application thereof of a kind of dissolving biological cells in sludge in the technical field of sewage.
Background technology
The biological wastewater treatment technology that with the activated sludge process is representative can produce a large amount of excess sludges, and the disposal costs of excess sludge accounts for about the 40-60% of sewage work's overall running cost.The technology of research residual sludge reduction is the sewage treatment area urgent problem.Residual sludge reduction can be realized by the generation of adopting new reactor or operation to reduce mud from the source.As people such as Feng Quan invention utilize aerobic-anaerobism be coupled repeatedly sewage disposal (Xing Xinhui, Feng Quan, Lou Kai, Luo Mingfang authorizes patent of invention ZL200310121766.7; Feng Quan, Xing Xinhui, Liu Zehua is the biological wastewater treatment technology progress of target with the residual sludge reduction, chemical industry progress, 2004,23 (8): 832-836; Feng Quan, Liu Zehua, Liang Peng, Xing Xinhui, with aerobic-anaerobism repeatedly coupling bioreactor handle inosine production waste water, chemical industry environmental protection, 2006,26 (6): 484-487) with relevant porous support technology (Xing Xinhui, Feng Quan authorizes patent of invention ZL200410080347.8) and defend the pretty ball of wandering about as a refugee (rubble ball) sewage disposal technology of taking charge of invention of rattan and (defend the pretty department of rattan, authorize patent of invention, CN96106018.2,1997) etc.
The approach of another residual sludge reduction is the mud produced by handling, promptly mud is carried out bacteriolyze and handles, then it is utilized again or and sewage flow into together and carry out biological decomposition in the aeration tank, thereby reduce the sludge quantity that to system outside, discharges.Utilizing various molten born of the same parents' technology, bacterium matrix that is can be rapidly dead and that become microbial metabolism is utilized by other bacteriums once more, is the necessary means of this sludge decrement process.Promote cytolysis, in conventional model, can think to have increased attenuation cell speed, can reduce the output of excess sludge like this.Promote that at present the cytolytic method of mud has: chemical method (acid or alkaline purification), physics method (heating, ultrasonic wave, ball milling, high-pressure homogeneous and shearing homogeneous), oxidation style (hydrogen peroxide, ozone, chlorine oxidation) and biological enzyme processing etc.In aforesaid method, on operability, cost and effect, ozone oxidation is one of method that has potentiality.
The oxidisability of ozone is extremely strong, and its redox potential is only second to fluorine.Resultant is an oxygen behind the ozone reaction, so ozone is the oxygenant of non-secondary pollution efficiently.It is reported, in methods such as high-pressure decomposing mud, thermal treatment and ozone oxidation decomposition cell, ozone oxidation is the highest method of usefulness (Muller, Pretreatment processes forthe recycling and reuse of sewage sludge.Water Science and Technology 2000,42 (9): 167-174).People such as Yasui propose that at first excess sludge is turned back to the aeration tank after with ozone oxidation can make mud decrement.For BOD loading is the device of 550kg/d, moving 10 months does not have excess sludge to discharge (Yasui andShibata, An Innovative Approach to Reduce Excess Sludge Production in theActivated-Sludge Process.Water Science and Technology 1994,30 (9): 11-20).Japanese Patent " Pre-treatment of sludge by oxidation using ozone for predetermined time in reactor " (patent No. JP2222798-A) adopts ozone that excess sludge is carried out pre-treatment, improve the dissolution rate of mud, and then carry out anaerobic digestion, can significantly improve the anaerobically fermenting speed of mud.
At present, ozone is applied to excess sludge reduction and has some serious problems.The one, ozone is solvability and less stable in water, and the utilization ratio of ozone is not high, adds that the cost incurred of ozone is higher, causes the expense of ozonize higher; The 2nd, the generally not high (Bougrier of the dissolved efficiency of ozonize mud, C., Albasi, C.et al., Effectof ultrasonic, thermal and ozone pre-treatments on waste activated sludge solubilisationand anaerobic biodegradability.Chemical Engineering and Processing 2006,45 (8): 711-718).Expect higher dissolved efficiency, need increase the dosage of ozone greatly, this also certainly will increase working cost.Therefore, the technology of the utilising efficiency of the further raising of research and development ozone and oxidation capacity, reduction running cost is extremely urgent in sludge reduction is used, and water environment protection is had crucial Practical significance.
The diameter of micron bubble generally below 50 μ m, and usually the bubble diameter that discharges of bubbling device at 0.5-5mm.Micron bubble is compared with common bubble has many special advantages, mainly shows as very large specific surface area, lift velocity and higher internal pressure and dissolution rate slowly.The mass transfer enhancement of micron bubble, the influence of redox reaction and biological metabolism effect etc. caused the very big concern of scientist and society.
Summary of the invention
The method and a kind of sludge reduction method that the purpose of this invention is to provide a kind of dissolving biological cells in sludge (mud cell).
The method of dissolving mud cell provided by the present invention is that the ozone micron bubble is fed in the mud solution, makes described biological cells in sludge dissolving.
Sludge reduction method provided by the present invention is that the ozone micron bubble is fed in the mud solution, makes described mud decrement.
The diameter of described ozone micron bubble can preferably smaller or equal to 60 microns, especially be preferably smaller or equal to 50 microns smaller or equal to 100 microns.
The content of the total solids suspended substance (TSS) of described mud solution is 1500-15000mg TSS/L, is preferably 1500-10000mg TSS/L, especially is preferably 1500-6000mg TSS/L.
Wherein, the weight of total solids suspended substance (TSS) is measured as follows: mud solution at 4 ℃, centrifugal 10min under the 10000rpm is dried the solid residue after centrifugal to constant weight in 105-110 ℃ of baking oven, and gained weight is the weight of suspended solid material.
In the described method, the ozone amount that feeds in the described mud solution is 0.004-0.5g/g TSS, is preferably 0.06 one 0.2g/g TSS, especially is preferably 0.10-0.16g/g TSS.
Can directly be assembled into the ozone micron bubble generator and obtain the ozone micron bubble with existing micron bubble producer and ozonizer.
Method of the present invention can be handled the excess sludge that the biological treatment of any municipal effluent and industrial organic waste water is produced.
The present invention also provides a kind of device that is used for mud decrement.
The device that is used for mud decrement provided by the present invention comprises producing above-mentioned any ozone micron bubble generator of ozone micron bubble, and the reactor that mud solution and ozone micron bubble reaction compartment are provided; Described reactor has an inlet that is used for to described ozone micron bubble generator input mud solution.
Wherein, described ozone micron bubble generator mainly is made up of ozonizer and micron bubble producer; Described micron bubble producer is formed by pipe connection by water pump, magnetic resonance acceleator and decollator; Described decollator is located at the bottom of described reactor; Described water pump is used for pumping into described magnetic resonance acceleator simultaneously with the ozone of described ozonizer generation with by the mud solution that described reactor is exported; Described magnetic resonance acceleator is discharged the ozone gas liquid mixture that produces by described decollator jet, form the ozone micron bubble.
Wherein, ozonizer is used to produce ozone, and existing discharge type ozonizer all can adopt, as Eco Design (Japan).
The existing producer that produces micron bubble all can adopt, as Japanese Kyowa Engineering Co., and the micron bubble producer that Ltd. produces.
Described water pump is used for pumping into water and ozone in described magnetic resonance acceleator, or mud solution and ozone, and its pressure is increased.Water and ozone after the pressurization that described magnetic resonance acceleator pumps into described water pump, or mud solution and ozone rotation mix, and ozone gas is fully dissolved in the water, gas-liquid mixture is discharged by decollator, forms diameter and be the bubble less than 100 microns.
The above-mentioned device that is used for mud decrement, its operation can be to supply with mud continuously in reactor, also can be that batch formula is supplied with, or adopt fed-batch mode to supply with mud.
Experiment showed, and adopt the micron bubble technology can improve the dissolution rate and the utilization ratio of ozone greatly, and can promote the generation of hydroxyl radical free radical, strengthen its oxidation capacity significantly, thereby ozonation technology cheaply is provided.The experimental result of using ozone oxidation excess sludge dissolving decrement shows, when the ozone dosage is 0.06-0.16g/g TSS, adopts the utilization ratio of micron bubble system ozone to remain on more than 99% always; And the utilization ratio that adopts common bubble systems ozone reduces with the prolongation in reaction times, and ozone utilization rate is at 74-94%.When the ozone dosage was 0.06-0.16g/g TSS, the COD dissolution rate of micron bubble system can reach 25-50%, and bubble systems is 10-20%.
The present invention is directed to a large amount of excess sludge problems that current biological sewage treatment produces, the micron bubble technology is applied in the ozone oxidation process, ozone gas disperses to be dissolved in the mud mixed liquid with the form of micron bubble, because gas-to-liquid contact area and bubble density are bigger, can significantly improve the utilization ratio of ozone on the one hand; The particle diameter of micron bubble is little on the other hand, the internal pressure height, and lift velocity is slow, can promote the generation of hydroxyl radical free radical.The mud cell is broken wall, dissolving under the oxygenizement of ozone molecule and hydroxyl radical free radical, discharges the organic matter in the membrane.Thereby improve the dissolved efficiency of mud cell greatly, the bottleneck problem that the mud dissolution rate that the solution traditional method exists is difficult to improve.
The present invention adopts the micron bubble technology to significantly improve the utilization ratio of ozone, strengthen its oxidation capacity, promote that microorganism cells significantly dissolves, realize the minimizing of excess sludge, solve a large amount of excess sludge problems that biological sewage treatment produces, and provide core technology for the decomposition again or the recycling of residuum mud.Ozone gas is fed in the micron bubble producer, produce median size at tens microns with interior micron ozone bubbles.The micron ozone bubbles is dissolved in the excess sludge solution of biological sewage treatment generation, excess sludge is carried out oxide treatment.The strong oxidation of ozone can be broken cell walls (film), and the organic matter in the film is discharged.Because the strong oxidation capacity of micron ozone, part cell organic matter can also be carbonic acid gas and water by mineralising directly in the cytoclasis process.After the mud cell was strengthened dissolving by the micron ozone bubbles, its solids content reduced greatly.The organic matter that discharges can produce methane by subsequent anaerobic digestion technology and remove, and also can be back in the aeration tank by aerobic degradation, or enter the other biological zymotechnique and produce enzyme or Biodegradable material etc.As shown in Figure 1, the excess sludge of strengthening after dissolving can be back to the aeration tank, by aerobic degradation, the sludge yield of entire sewage treatment system is reduced with water inlet, can accomplish zero release (Fig. 1, the road is through I) even.Also can enter anaerobic digester, produce methane (Fig. 1, the road is through II) by anaerobically fermenting.Solution after the dissolution process also can be used as the liquid nutritional thing of microorganism, enters the zymotechnique (Fig. 1, approach III) of production zymin or other meta-bolitess (as the biodegradable plastic raw material).Also can enter aerobic-anaerobism coupling device excess sludge is further dissolved after the nitrogen of also partly removing molten born of the same parents' release, return the aeration tank again, with the load (Fig. 1, approach IV) that alleviates the aeration tank.Ozone oxidation system among Fig. 1 is ozone micron bubble of the present invention and handles mud solution system, employing micron ozone bubbles technology reinforcement sludge solubilizing reaction device as shown in Figure 2.
The present invention adopts a micron ozone bubbles technology dissolving mud cell, strengthens the dissolution process of excess sludge, and the major advantage of this technology is:
(1) utilization ratio of ozone can improve greatly.In the mass-transfer efficiency of ozone and the reactor turbulent fluctuation degree of liquid, ozone in water decomposition kinetics and to produce bubble quantity and bubble relevant with size.The micron order ozone bubbles can improve density and the gas-liquid contact area of ozone gas in water greatly, thereby significantly improves the dissolution rate and the utilization ratio of ozone, reduces the feed rate of ozone.Control exit gas ozone concn reaches the level of direct discharging, and then reduces the disposal costs of ozone tail gas greatly.
(2) the micron ozone bubbles with high internal pressure excites the generation of hydroxyl radical free radical when fragmentation is dissolved, thereby strengthens the oxidation capacity of ozone.The oxidation path of ozone comprises that the direct attack of ozone molecule and ozone molecule are decomposed to form the hydroxyl free radical reaction, and the oxidisability of hydroxyl radical free radical is far above ozone molecule.By the generation of micron bubble technology reinforcement hydroxyl radical free radical, can significantly improve the dissolution rate and the dissolved efficiency of mud.
(3) liquor pump 2 (Fig. 2) energy that dissolves bubble in the course of the work and consumed dissipates (different with common millimeter bubble at micron bubble, micron bubble dwindles into to disappear behind the nano grade air bubbles in liquid gradually to be buried in oblivion in water) the back major part stays in the liquid, add the mechanical friction heat of pump, the temperature of mud mixed liquid is raise to some extent, and this dissolving to mud produces the forward promoter action.And the pressurization of pump can promote the dissolving of ozone gas, thereby can realize the comprehensive utilization of energy, reduces the whole cost of sludge treatment.
Method of the present invention improves the utilization ratio of ozone greatly, and improves the dissolution rate of mud.Initial sludge concentration is in the 1300-9000mg/L scope, and ozone dosage (feeding the ozone amount of mud solution) is 0.06-0.16g O
3During/gTSS, the COD dissolution rate and the solid dissolution rate of mud reach 25-50% and 15-35%; The utilization ratio of ozone gas is more than 99%, and ozone concn can be controlled in the scope that allows discharging in the tail gas.
Description of drawings
Fig. 1 is that ozone mud decrement engineering is used synoptic diagram
Fig. 2 adopts micron ozone bubbles technology reinforcement sludge solubilizing reaction schematic representation of apparatus
Fig. 3 amplifies 40 during for 0.5L/min and shows little photograph photo for charge flow rate
Fig. 4 is the comparison that micron bubble system of the present invention and traditional bubble systems export ozone concn
Fig. 5 A is the variation of the COD dissolution rate of mud with the ozone dosage
Fig. 5 B is the variation of the solid dissolution rate of mud with the ozone dosage
Fig. 6 is the microscopic examination photo of mud metamorphosis before and after the ozonize
Embodiment
L, ozone micron bubble generator
The ozone micron bubble generator as shown in Figure 2, mainly is made up of ozonizer 1 and micron bubble producer.The micron bubble producer is formed by pipe connection by water pump 2, magnetic resonance acceleator 3 and decollator 4.
This ozone micron bubble generator also comprises the oxygen cylinder 0 that holds raw material-oxygen of producing ozone, the reactor 5 that mud solution and ozone micron bubble reaction compartment are provided.Reactor 5 has an input terminus 6 and 3 output terminals.Input terminus 6 is used for to reactor 5 input mud solution.Output terminal 7 is used for to water pump 2 input mud solution, and the mud that output terminal 8 is used for dissolving is finished is discharged, and output terminal 9 is for getting rid of the passage of tail gas.
The input terminus of ozonizer 1 is connected with oxygen cylinder 0 by pipeline, the output terminal of ozonizer 1 is connected by the input terminus of pipeline with water pump 2, the output terminal of water pump 2 is connected by the input terminus of pipeline with magnetic resonance acceleator 3, the output terminal of magnetic resonance acceleator 3 is connected by the input terminus of pipeline with decollator 4, and decollator 4 is located at reactor 5 bottoms.
Pump into simultaneously in the magnetic resonance acceleator 3 by water pump 2 by the ozone of ozonizer 1 generation with by the mud solution that refluxes in the reactor 5.
Ozone gas self-priming and going into, the mud solution of the ozone of suction and backflow enter in the cycle accelerator and mix.The mud solution that refluxes is rotating state through the pressurization back in the cycle accelerator.Ozone gas mixes, dissolves with pressurized sludge solution under the very violent situation of disturbance.At this moment ozone gas exists with two kinds of forms in magnetic resonance acceleator, and a kind of is to be dissolved in the water, and another kind is that micro bubble wraps, is blended in the water with unbound state.At last, gas-liquid mixture is discharged by the decollator jet, forms the micron order bubble.
Wherein, ozonizer 1 adopts the ED-OG-R4 type ozonizer of Japanese Eco Design.
The M20NPD04S turbulence pump that the Japanese nikuni of water pump 2 employings company produces.
Decollator 4 is by Japanese Kyowa Engineering Co., and Ltd. produces, and its jet orifice diameter is 3 millimeters.
Above-mentioned pipeline adopts stainless steel pipe.
For comparing the treatment effect of micron bubble system, a micropore titanium plate aerator 10 is directly placed in reactor 5 bottoms, and its aperture is 40 μ m, forms a traditional bubbling system.When the bubbling system was moved, the ozone gas that ozonizer 1 produces directly was passed in the reactor 5 by aerator 10.
2, utilize biomass cells in the ozone micron bubble generator dissolving mud of step 1
Test mud is taken from Qinghe, Beijing sewage work inversion A
2Returned sluge of/O technology (note is made mud 1) and the A of Gaobeidian City sewage work
2The returned sluge of/O technology (note is made mud 2).
Because the actual sludge concentration of sewage work has fluctuation during sampling, the mud solution note of different batches is made 1-a, 1-b, 1-c, 1-d, 2-a and 2-b.In mud 1-d, add water, be made into mud solution 1-e.
The concentration of mud solution 1-a is 5200mg TSS/L.The main characteristic index is: volatile suspended solid (VSS) is 70.0% with the ratio of total solids suspended substance (TSS), and the settling ratio of mud (SV) is 44%.
The concentration of mud solution 1-b is 4600mg TSS/L.The main characteristic index is: volatile suspended solid (VSS) is 65.7% with the ratio of total solids suspended substance (TSS), and the settling ratio of mud (SV) is 39%.
The concentration of mud solution 1-c is 4300mg TSS/L.The main characteristic index is: volatile suspended solid (VSS) is 65.1% with the ratio of total solids suspended substance (TSS), and the settling ratio of mud (SV) is 40%.
The concentration of mud solution 1-d is 3900mg TSS/L.The main characteristic index is: volatile suspended solid (VSS) is 61.7% with the ratio of total solids suspended substance (TSS), and the settling ratio of mud (SV) is 38%.
The concentration of mud solution 1-e is 1300mg TSS/L.The main characteristic index is: volatile suspended solid (VSS) is 65.0% with the ratio of total solids suspended substance (TSS), and the settling ratio of mud (SV) is 20%.
The concentration of mud solution 2-a is 3600mg TSS/L.The main characteristic index is: volatile suspended solid (VSS) is 78.2% with the ratio of total solids suspended substance (TSS), and the settling ratio of mud (SV) is 34%.
The concentration of mud solution 2-b is 3200mg TSS/L.The main characteristic index is: volatile suspended solid (VSS) is 72.5% with the ratio of total solids suspended substance (TSS), and the settling ratio of mud (SV) is 32%.
Mud solution 1-b` is identical with the character of mud solution 1-b.
Wherein, total solids suspended substance (TSS), the weight of general volatile suspended substance (VSS) is measured as follows: mud solution at 4 ℃, centrifugal 10min under the 10000rpm, solid residue after centrifugal is dried to constant weight in 105-110 ℃ of baking oven, and gained weight is the weight of suspended solid material.Put it into then in the retort furnace, to constant weight, the difference of twice weight is the weight of general volatile suspended substance 600 ℃ of following calcinations.The measuring method of sludge settling ratio (SV%) is: with mud mixed liquid as in the 100ml graduated cylinder, after leaving standstill, precipitating 30min, the volume ratio of precipitating sludge and mixed solution (%).
Mud solution 1-a, 1-b, 1-c, 1-d, 1-e, 2-a and 2-b are fed reactor 5 by the input terminus 6 of reactor 5 respectively, make the volume of mud solution reach 8L.Every kind of mud solution is established 2 repetitions.
Wherein, the mean diameter that feeds the micron ozone bubbles that fills mud solution 1-a is 58 microns, and the total amount that feeds ozone is 0.16g/g TSS, and the treatment time is 120min.
The mean diameter that feeding fills the micron ozone bubbles of mud solution 1-b is 58 microns, and the total amount that feeds ozone is 0.15g/g TSS, and the treatment time is 100min.
The mean diameter that feeding fills the micron ozone bubbles of mud solution 1-c is 58 microns, and the total amount that feeds ozone is 0.16g/g TSS, and the treatment time is 80min.
The mean diameter that feeding fills the micron ozone bubbles of mud solution 1-d is 58 microns, and the total amount that feeds ozone is 0.10g/g TSS, and the treatment time is 60min.
The mean diameter that feeding fills the micron ozone bubbles of mud solution 1-e is 58 microns, and the total amount that feeds ozone is 0.21g/g TSS, and the treatment time is 40min.
The mean diameter that feeding fills the micron ozone bubbles of mud solution 2-a is 58 microns, and the total amount that feeds ozone is 0.19g/g TSS, and the treatment time is 100min.
The diameter that feeding fills the micron ozone bubbles of mud solution 2-b is that mean diameter is 58 microns, and the total amount that feeds ozone is 0.22g/g TSS, and the treatment time is 100min.
With the input terminus 6 feeding reactors 5 of mud solution 1-b`, make the volume of mud solution reach 8L by reactor 5.The ozone bubbles that feeding fills mud solution 1-b` is millimeter level (for 0.5-5mm), and the total amount that feeds ozone is 0.18g/g TSS.Contrast as the micron bubble system.
The unstripped gas of ozonizer 1 is a high purity oxygen gas, and electric current is 2A, and pressure is 0.1MPa.The flow that produces ozone gas is 0.5L/min, and ozone concn is 115mg/L.Regulate the flow of the mud mixed liquid that pumps into by being installed in valve on the pipeline.Mud solution in the reactor 5 enters water pump 2 with 30L/min.The gas-liquid throughput ratio is 1:60.At last, gas-liquid mixture is discharged by the jet orifice jet of decollator with the flow of 30.5L/min, forms the micron order bubble.
The bubble that adopts micrographic method that (20L) in the ozone gas feeding pure water produced has carried out observing takes pictures.Used instrument is a Nikon E600 microscope, is furnished with Real-time Spot CCD microscopic digital photographic camera.After the micron bubble system reaches steady state, from reactor, to take a sample fast in quartz colorimetric utensil, sealing is placed on the microscopically observation and takes pictures.Image analysis select for use Image-Pro Plus software (Media Cybernetics Company, USA).Fig. 3 amplifies 40 times of bubble pictures that taken during by 0.5L/min for charge flow rate.Table 1 is 0.02,0.1 and during 0.5L/min for gas flow, after the picture analyzing and processing of being taken, and the bubble median size and the bubble density that calculate.As can be seen, gas flow is more little, and the diameter that produces bubble is more little.When charge flow rate during less than 0.5L/min, the median size that produces bubble is less than 60 microns.
Table 1 various inlet flow produces the median size and the density of bubble down
Adopt semi continuous operation.Earlier mud solution is poured in the reactor, ozone gas feeds continuously.
Experimental result shows, use micron ozone bubbles system handles mud solution 1-a, 1-b, 1-c, 1-d, 1-e, 2-a and 2-b, the concentration of the ozone gas of outlet 9 all remains on lower level, be 0.12-0.69mg/L, the utilization ratio of ozone gas (entering ozone amount in the reactor 5, to deduct the ozone amount of discharging reactor 5 be the ozone amount that solution is utilized in the reactor, and this value and the ratio that enters the ozone amount in the reactor are the utilization ratio of ozone gas) can reach more than 99%.And adopting common bubble systems, the utilization ratio of ozone constantly to reduce along with the prolongation in reaction times, mud solution 1-b` ozone utilization rate is at 74-94% (Fig. 4).This shows that employing micron bubble system can significantly improve the utilization ratio of ozone.
The relation of the COD dissolution rate of embodiment 2, mud and solid dissolution rate and ozone dosage
Device, experimental technique and mud solution used in this experiment are identical with embodiment 1.Mud solution 1-a, 1-b, 1-c, 1-d, 1-e, 2-a and 2-b adopt the micron bubble system of embodiment 1 to handle, and feed mud solution 1-b` and adopt the common blister system of embodiment 1 to handle.
Indexs such as total COD of difference sampling and measuring mud solution, COD, the TSS of supernatant liquor and VSS.
The dissolution rate of mud is with COD dissolution rate (S
COD) and solid dissolution rate (S
TSS) characterize.
S
COD＝(COD
p0-COD
p)/COD
p0
S
TSS＝(TSS
0-TSS)/TSS
0
COD
pThe COD (mg/L) of solid part in the expression mud mixed liquid, TSS represents total suspended solid concentration (mg/L), subscript 0 expression initial time.
Wherein, the difference of total COD of mud solution and supernatant C OD is the COD of solid part
P
Wherein, the total amount that feeds the ozone of mud solution 1-a be respectively 0.054,0.081,0.135,0.162g/g TSS.
The total amount that feeds the ozone of mud solution 1-b is respectively 0.015,0.030,0.045,0.061,0.091,0.121,0.151g/g TSS.
The total amount that feeds the ozone of mud solution 1-c is respectively 0.010,0.020,0.031,0.041,0.061,0.123,0.164g/g TSS.
The total amount that feeds the ozone of mud solution 1-d is respectively 0.009,0.035,0.053,0.070,0.105g/g TSS.
The total amount that feeds the ozone of mud solution 1-e is respectively 0.026,0.053,0.105,0.158,0.210g/g TSS.
The total amount that feeds the ozone of mud solution 2-a is respectively 0.037,0.075,0.112,0.149,0.187g/g TSS.
The total amount that feeds the ozone of mud solution 2-b is respectively 0.011,0.087,0.130,0.174,0.217g/g TSS.
The total amount that feeds the ozone of mud solution 1-b` is respectively 0.0103,0.021,0.061,0.077,0.154,0.186g/g TSS.
Fig. 5 A and Fig. 5 B represent that the COD dissolution rate of mud and solid dissolution rate are with the ozone dosage changing conditions of (the ozone dosage refers to the ozone amount that utilized by the mud solution in the reactor 5, and the ozone amount that equals to enter in the reactor 5 deducts the ozone amount of discharging reactor 5).Fig. 5 shows, when the ozone dosage is 0.06-0.16g O
3During/g TSS, the COD dissolution rate of mud can reach 25-50%, and the solid dissolution rate can reach 15-35%.And adopting common bubble systems, the COD dissolution rate of mud and solid dissolution rate are 10-20%.Under identical ozone dosage, the micron bubble system improves 10-30% than common bubble systems mud dissolution rate.This shows that micron bubble can improve the utilization ratio of ozone, can also strengthen ozone oxidation, thereby improves the dissolution rate of mud.Microorganism microscopy (Nikon E600 microscope, magnification is 600 times) result shows, after mud solution 1-a, 1-b, 1-c, 1-d, 1-e, 2-a and 2-b adopt the micron bubble system handles of embodiment 1, oneself cell fragmentation of being broken and being decomposed into fritter of mud flco in the visual field has not had complete cell.Fig. 6 shows is photo after mud solution 1-a adopts the micron bubble system handles of embodiment 1, and wherein, the total amount that feeds the ozone of mud solution 1-a is 0.16g/g TSS.Among Fig. 6, A is the preceding photo of reaction, and B is the photo of reaction after 40 minutes.This remarkable reinforcement sludge dissolved technology is to realize the key of residual sludge reduction.
Claims (10)
1, a kind of method of dissolving biological cells in sludge is that the ozone micron bubble is fed in the mud, makes the biomass cells dissolving in the described mud.
2, method according to claim 1 is characterized in that: the diameter of described ozone micron bubble is preferably smaller or equal to 60 microns for smaller or equal to 100 microns, especially is preferably smaller or equal to 50 microns.
3, method according to claim 1 is characterized in that: the content of the total solids suspended substance of described mud solution is 1500-15000mg TSS/L, is preferably 1500-10000mg TSS/L, especially is preferably 1500-6000mg TSS/L.
4, according to claim 1 or 2 or 3 described methods, it is characterized in that: the amount that feeds the ozone in the described mud solution is 0.004-0.5g/g TSS, is preferably 0.06-0.2g/g TSS, especially is preferably 0.10-0.16g/g TSS.
5, a kind of sludge reduction method is that the ozone micron bubble is fed in the mud solution, makes described mud decrement.
6, method according to claim 5 is characterized in that: the diameter of described ozone micron bubble is preferably smaller or equal to 60 microns for smaller or equal to 100 microns, especially is preferably smaller or equal to 50 microns.
7, method according to claim 5 is characterized in that: the content of the total solids suspended substance of described mud solution is 1500-15000mg TSS/L, is preferably 1500-10000mg TSS/L, especially is preferably 1500-6000mg TSS/L.
8, according to claim 5 or 6 or 7 described methods, it is characterized in that: the ozone amount that feeds described mud solution is 0.004-0.5g/g TSS, is preferably 0.06-0.2g/g TSS, especially is preferably 0.10-0.16g/gTSS.
9, a kind of device that is used for mud decrement comprises the ozone micron bubble generator that produces the described ozone micron bubble of arbitrary claim among the claim 1-8, and the reactor of mud solution and ozone micron bubble reaction compartment is provided;
Described reactor has an inlet that is used for to described ozone micron bubble generator input mud solution.
10, device according to claim 9 is characterized in that: described ozone micron bubble generator mainly is made up of ozonizer and micron bubble producer;
Described micron bubble producer is formed by pipe connection by water pump, magnetic resonance acceleator and decollator;
Described decollator is located at the bottom of described reactor;
Described water pump is used for pumping into described magnetic resonance acceleator simultaneously with the ozone of described ozonizer generation with by the mud solution that described reactor is exported;
Described magnetic resonance acceleator is discharged the ozone gas liquid mixture that produces by described decollator jet, form the ozone micron bubble.
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| CNA2007101795398A CN101456655A (en) | 2007-12-14 | 2007-12-14 | Method for dissolving biological cell in sludge and use thereof |
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| CNA2007101795398A CN101456655A (en) | 2007-12-14 | 2007-12-14 | Method for dissolving biological cell in sludge and use thereof |
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| CN101696054B (en) * | 2009-10-27 | 2011-06-29 | 清华大学 | Method for promoting growth and nitrification activity of amine salt oxidizing bacteria in activated sludge |
| CN102351392A (en) * | 2011-09-17 | 2012-02-15 | 崔杰 | Plasma nanometer bubble sludge reduction treatment device |
| CN102351393A (en) * | 2011-09-17 | 2012-02-15 | 崔杰 | Plasma nanometer bubble sludge reduction treatment method |
| CN102417283A (en) * | 2010-09-27 | 2012-04-18 | 财团法人工业技术研究院 | Organic solid hydrolyzing method and device thereof |
| CN103663893A (en) * | 2012-09-19 | 2014-03-26 | 中国石油化工股份有限公司 | Method of reducing sludge of petrochemical wastewater by aerating combination of ozone and pure oxygen |
| US9169135B2 (en) | 2010-09-03 | 2015-10-27 | Industrial Technology Research Institute | Method and apparatus for hydrolyzing organic solid |
| CN105110583A (en) * | 2015-07-30 | 2015-12-02 | 北京林业大学 | Method for disintegrating residual sludge to raise hydrolytic acidification efficiency by high pressure homogenization technology |
| CN105800894A (en) * | 2016-05-27 | 2016-07-27 | 中山市佰明环保科技有限公司 | Sludge treatment method |
| TWI571442B (en) * | 2015-07-08 | 2017-02-21 | Lin Zhi-Yan | Biological sludge lysis reaction system |
| CN109970293A (en) * | 2019-02-19 | 2019-07-05 | 同济大学 | A method of strengthening municipal sludge ultrasonic pretreatment |
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| CN111646665A (en) * | 2020-07-10 | 2020-09-11 | 北京亦庄水务有限公司 | Sludge reduction treatment equipment and treatment method |
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| CN101696054B (en) * | 2009-10-27 | 2011-06-29 | 清华大学 | Method for promoting growth and nitrification activity of amine salt oxidizing bacteria in activated sludge |
| US9169135B2 (en) | 2010-09-03 | 2015-10-27 | Industrial Technology Research Institute | Method and apparatus for hydrolyzing organic solid |
| CN102417283A (en) * | 2010-09-27 | 2012-04-18 | 财团法人工业技术研究院 | Organic solid hydrolyzing method and device thereof |
| CN102417283B (en) * | 2010-09-27 | 2014-09-03 | 财团法人工业技术研究院 | Organic solid hydrolyzing method and device thereof |
| CN102351392A (en) * | 2011-09-17 | 2012-02-15 | 崔杰 | Plasma nanometer bubble sludge reduction treatment device |
| CN102351393A (en) * | 2011-09-17 | 2012-02-15 | 崔杰 | Plasma nanometer bubble sludge reduction treatment method |
| CN103663893A (en) * | 2012-09-19 | 2014-03-26 | 中国石油化工股份有限公司 | Method of reducing sludge of petrochemical wastewater by aerating combination of ozone and pure oxygen |
| CN103663893B (en) * | 2012-09-19 | 2015-10-14 | 中国石油化工股份有限公司 | Ozone is combined the method realizing petrochemical wastewater mud decrement with pure oxygen aeration |
| TWI571442B (en) * | 2015-07-08 | 2017-02-21 | Lin Zhi-Yan | Biological sludge lysis reaction system |
| US10207944B2 (en) | 2015-07-08 | 2019-02-19 | Chang-Ching Lin | Biosludge treatment system |
| CN105110583A (en) * | 2015-07-30 | 2015-12-02 | 北京林业大学 | Method for disintegrating residual sludge to raise hydrolytic acidification efficiency by high pressure homogenization technology |
| CN105800894A (en) * | 2016-05-27 | 2016-07-27 | 中山市佰明环保科技有限公司 | Sludge treatment method |
| CN109970293A (en) * | 2019-02-19 | 2019-07-05 | 同济大学 | A method of strengthening municipal sludge ultrasonic pretreatment |
| CN110217881A (en) * | 2019-05-09 | 2019-09-10 | 刘邦楠 | The digestion decrement method of biochemistry pool activated sludge |
| CN110217881B (en) * | 2019-05-09 | 2021-12-28 | 刘邦楠 | Digestion and decrement method of active sludge in biochemical tank |
| CN111646665A (en) * | 2020-07-10 | 2020-09-11 | 北京亦庄水务有限公司 | Sludge reduction treatment equipment and treatment method |
| CN113233730A (en) * | 2020-12-15 | 2021-08-10 | 戴余琼 | Ozone reduction method for sludge treatment |
| CN112607987A (en) * | 2020-12-29 | 2021-04-06 | 吉林农业大学 | System for ecological enzyme preparation is used for mud decrement |
| CN113149389A (en) * | 2021-03-23 | 2021-07-23 | 深圳市深水水务咨询有限公司 | Treatment method of biodegradable solid waste |
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