CN102815854B - Method for promoting rapid drying of dredged silt by microorganism - Google Patents
Method for promoting rapid drying of dredged silt by microorganism Download PDFInfo
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Abstract
The invention relates to a method for promoting rapid drying of dredged silt by a microorganism. The method includes: taking straw and other organic matters as a substrate, conducting anaerobic fermentation and decomposition, burying the substrate in a silt storage yard, pre-burying a vacuum pumping pipe network system, inputting dredged silt, and then adding a flocculant and a coagulant aid to perform initial concentration, vacuum pumping, compression and other processes. The method for promoting rapid drying of dredged silt by a microorganism makes use of life activities of the microorganism and the produced gas to change the compact silt state formed during vacuum pumping, makes the silt become loose and porous, promotes flow of moisture, thereby improving the water pumping and drainage effect of vacuum preloading, and transforming the dredged silt from a fluid state to a plastic state or semi-solid state rapidly. Thus, the method realizes rapid dewatering and drying of dredged sludge, and has the characteristics of low cost and short construction period.
Description
Technical field
The invention belongs to mud drying and other treatment technical field, relate to the drying method for treating of dredging silt, particularly a kind of microorganism promotes the method for the quick mummification of dredging silt.
Background technology
River and lake silt is normally transmitted through the effect such as long-time physics, chemistry, biology and water body by the mixture of clay, silt, organic matter and various mineral and is deposited on water bottom and forms, a large amount of depositions of mud not only can be stopped up river course, cause the network of rivers not smooth, the pollutent discharged to water body for a long time also can bring the endogenous in He Hai lake to pollute.China is vast in territory, the lake, river is numerous, in the urbanization high speed development stage, produce a large amount of mud wastes every year, according to investigations again, only Taihu Lake, Jiangsu just has 69.83% area to be covered by the mud more than 0.1m by thickness, thickness is up to more than 5m, total accumulation 19.12 billion cubic meters of mud, and mean depth is 1.24m, the dredging desilting of lake, visible river is imperative, has brought again thus the processing problem of dredging silt.According to incompletely statistics, China often is only more than discarded dredging silt just reaches 1 billion cubic meter, and discarded dredging silt often is placed in throwing district, land or low laying areas, has seriously taken the land resourcess such as fish pond, cultivated land, processes and also can affect the desilting process not in time.Practice shows, the dredging silt water ratio is high, usually is fluid state, though the mud directly cleared out stack reach 3 years inner still containing a large amount of water, so poor mechanical property, without bearing capacity, rain drop erosion and very easily cause in transit secondary pollution.
The key addressed the above problem is the drying and other treatment of dredging silt.Restriction due to land area, China generally carries out for the drying and other treatment of dredging silt in stockyard that is mummifying pool, dredging silt after mummification should meet when machinery enters pond and excavates does not make machinery sink and the condition of water clock not during transportation, the mud containing rate (be generally 67%-68%) of this mud containing rate (ratio that refers to dry shale amount and mud total mass) that just requires the dredging silt after mummification during higher than plastic limit, requirement for the mud bearing capacity is to calculate with crawler-mounted excavator weight, and the mud bearing capacity must not be lower than 8t/m
2.
At present more for the method for dredging silt drying and other treatment, wherein because having, treatment capacity is large, technique is simple, cost is low, do not produce the advantages such as secondary pollution is most widely used for vacuum method, but the carrying out along with the mummification dehydration, mud is gradually reduced into fine and close state, sludge granules is tiny in addition, permeability coefficient is low, process extremely difficult discharge of remaining moisture of later stage, make the treatment cycle of vacuum method elongated and process after mud containing rate be difficult to arrive plastic limit more than.Develop again the new method of serving on the basis of vacuum method, for example:
CN 101941787A discloses a kind of river and lake silt drying method for treating, comprise the following steps: (1) is diluted to river and lake silt in the dilution mud of mud containing rate≤13.5%, add the inorganic flocculating agent of 0.1-0.15 part and the organic floculant of 3-4 part in 100 parts of dilution mud, stir 10-15 second under low whipping speed 200-250 rev/min, after stirring, 1-2 minute dilution mud flocculates, and supernatant liquor is discharged; (2) lower floor's mud step (1) obtained is after the suction filtration preliminary hydro-extraction, lower floor's mud (a) place Min layers is located in mummifying pool, lay two-layer filter cloth (b) between every layer of mud (a), between two-layer filter cloth (b), paving is spilt hydroscopic high-molecular resin (c), after standing 40-60 hour, obtain mummification mud; In described mummifying pool, the weight ratio of mud and hydroscopic high-molecular resin is 100:0.3-0.5.
CN 102249515A discloses a kind of dredged mud dewatering method of small suction cutter dredger, comprises the following steps: 1) dredging silt flocculation: add flocculation agent in the dredging silt of suction cutter dredger, dredging silt and flocculation agent carry out mixed precipitation; 2) geotextile dehydration: dredging silt, with after flocculation agent mixes, is packed into the geotextile drainage, realizes the dehydration of the dredging silt of suction cutter dredger.
CN 101774836A discloses the method for a kind of complex microorganism for dredging silt and domestic sludge hybrid composting, comprises the following steps: domestic sludge is carried out to initial fermentation, remove stink, reduce mosquitos and flies and grow; Domestic sludge through initial fermentation is mixed with volume ratio 1:1-2 with the mud of preliminary mummification, add agricultural wastes as conditioning agent, form mixture, controlling the initial aqueous rate is 50%-60%, add VT fermentation bed special bacteria agent 0.08%-0.15%, unit is the percent by volume that accounts for domestic sludge and always throwing amount of mud, mixes composting in the platform that is covered with ventilator trunk, forms the heap body; The heap body is carried out to aerobic fermentation, after 22-28 days, close ventilator trunk, become thoroughly decomposed after natural ventilation, obtain decomposed manure; The decomposed manure partial reflux, be added in mixture as the source of VT fermentation bed special bacteria agent.
CN 102001813A discloses a kind of sludge filtering pocket type dewatering that adds coagulating agent, described coagulating agent is chosen organic polymer coagulating agent polyacrylamide (molecular weight is 3000000 orders of magnitude), the polyacrylamide solution that coagulating agent is mass concentration 0.5%-1.0%, the dosage of polyacrylamide solution is 0.35% of mud weight, adopt the method in batches added (first to add 60%, be separated by after 1-2min and add again 40%) the filter cloth material is terylene 758, polypropylene fibre 750B, terylene 3927.Wherein the mud rate of recovery of terylene 758 filter bags reaches 96.6%, and moisture percentage in sewage sludge is down to 80.8% from 99%.
Aforesaid method has all been obtained certain effect, but long processing period and process after the mud containing rate problem that is difficult to reach plastic limit fundamentally be not resolved.
Treatment capacity is large, technique is simple, cost is low because having for vacuum method, do not produce the advantages such as secondary pollution is most widely used, but the carrying out along with the mummification dehydration, mud is gradually reduced into fine and close state, sludge granules is tiny in addition, permeability coefficient is low, process extremely difficult discharge of remaining moisture of later stage, make the treatment cycle of vacuum method elongated and process after mud containing rate still be difficult to arrive plastic limit more than.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of quick, thorough and lower-cost microorganism to promote the method for the quick mummification of dredging silt, its cost is low, and the duration is short, drainage efficiency is high, can make mud change even semi-solid state of plastic stage into from fluid state fast.
For achieving the above object, the present invention adopts following technical scheme:
A kind of microorganism promotes the method for the quick mummification of dredging silt, comprises the steps:
(1) the biological species organism is placed in to anaerobism closed environment anaerobically fermenting, with domestication anaerobic gas generation microorganism.
Described domestication anaerobic gas generation microorganism, its method is well known to those skilled in the art, can be by those skilled in the art according to practical situation and experience the processing condition during to concrete operations selected.
Described biological species organism refers to plant organism or animal excrement or the combination of the two.Such as stalk, straw, wheat straw, Herba Eichhorniae etc. of described plant organism.Described animal excrement such as pig manure, cow dung, sheep excrement, horsehit, chicken manure, duck excrement etc.Described combination such as stalk/pig manure, straw/cow dung, stalk/Herba Eichhorniae/chicken manure, wheat straw/horsehit/duck excrement etc.
(2), after having tamed, collect fermented liquid, standby after thin up.
Described domestication completes and refers to that at least three days gas production rate reach peak value continuously.
Preferably, described dilution is carried out according to the concentration of 1-3wt%, in the fermented liquid after the dilution, the quality of original fermented solution accounts for 1-3wt%, can be for example 1wt%, 1.1wt%, 1.28wt%, 1.3wt%, 1.45wt%, 1.5wt%, 1.62wt%, 1.7wt%, 1.8wt%, 1.9wt%, 2wt%, 2.05wt%, 2.1wt%, 2.2wt%, 2.39wt%, 2.4wt%, 2.5wt%, 2.6wt%, 2.61wt%, 2.7wt%, 2.8wt%, 2.96wt%, 3wt%; 2wt% more preferably.
(3) using the biological species organism as substrate, tightly stack to form inner anaerobic environment, to substrate splash fermented liquid after step (2) dilution so that the anaerobic gas generation microbial inoculant in substrate, become thoroughly decomposed.
Described biological species organism, with identical in step (1), does not repeat herein.
Preferably, fermented liquid after described dilution of splashing and the mass ratio of substrate are 1-2:1, can be for example 1:1,1.07:1,1.1:1,1.2:1,1.25:1,1.3:1,1.33:1,1.4:1,1.46:1,1.5:1,1.52:1,1.59:1,1.6:1,1.61:1,1.68:1,1.7:1,1.75:1,1.8:1,1.82:1,1.84:1,1.9:1,1.97:1,2:1; 1.5:1 more preferably.
Preferably, the described time of becoming thoroughly decomposed is 7-10d, can be for example 7d, 7.5d, 8d, 8.5d, 9d, 9.5d, 10d; Further preferred 9d.
Preferably, described temperature of becoming thoroughly decomposed is 15 ℃-35 ℃, can be for example 15-20 ℃, 17.3-32 ℃, 26-35 ℃, 15 ℃, 16.5 ℃, 17 ℃, 18 ℃, 19.7 ℃, 20.5 ℃, 22 ℃, 23.4 ℃, 24 ℃, 25 ℃, 27.5 ℃, 29 ℃, 30 ℃, 31.8 ℃, 33 ℃, 34 ℃, 34.6 ℃, 35 ℃; Further preferably 30 ℃.
(4) will complete the substrate become thoroughly decomposed and drain away the water, seal after packing.
Preferably, described packing is that substrate is loaded in Polywoven Bag.
Preferably, the substrate of 5-8kg is housed in each Polywoven Bag, further preferred 7kg.
(5) substrate of packing evenly is laid in to the silt stockyard bottom, and is fixed.
Preferably, the mass ratio of described substrate and mud dry weight is 0.5-1.5:100, can be for example 0.5:100,0.55:100,0.6:100,0.69:100,0.7:100,0.75:100,0.8:100,0.82:100,0.9:100,0.97:100,1:100,1.03:100,1.1:100,1.14:100,1.2:100,1.25:100,1.3:100,1.31:100,1.4:100,1.46:100,1.5:100; Further preferred 1:100.
Preferably, described silt stockyard is mummifying pool.
Preferably, described is fixedly to fix with fishing net, first covers fishing net on substrate, more evenly squeeze into timber or iron nail on fishing net.
After being fixed, substrate can guarantee that it can be not floating because being driven into silt slurry, mobile when the gas produced enters top mud.
(6) pre-buried drain board in silt stockyard, be connected drain board with vacuum lead, forms the pipe network system that vacuumizes.
The pore size of described drain board and the usage quantity of drain board all can be selected according to practical situation and experience by those skilled in the art.
Preferably, the aperture of described drain board is 80-100 μ m, can be for example 80-95 μ m, 83-98 μ m, 89-92 μ m, 80 μ m, 81.5 μ m, 82 μ m, 83 μ m, 84.6 μ m, 85 μ m, 86 μ m, 87.1 μ m, 88 μ m, 90 μ m, 90.4 μ m, 91 μ m, 91.2 μ m, 92.3 μ m, 93 μ m, 94 μ m, 94.8 μ m, 95 μ m; Further preferred 90 μ m.
Preferably, the silt stockyard bottom is fixed in described drain board lower end, and upper end is fixed in apart from surface opening 1m place, stockyard.So can prevent that drain board is floating or change position.
Preferably, described vacuum lead comprises arm and supervisor, and arm is connected with each drain board by joint, and all arms are connected with supervisor again, the common pipe network system that vacuumizes that forms.
Further preferably, described arm and supervisor all adopt the hard plastic tube that diameter is 70mm.
(7) pending dredging silt is inputted to silt stockyard by mud conveying pipeline, in mud conveying pipeline, successively add flocculation agent and coagulant aids, make the mud particle flocculation precipitation in mud, discharge face source water.
The medicament commonly used of described flocculation agent and coagulant aids this area, the flocculation agent that any those skilled in the art can be known and coagulant aids all can be applied in the present invention.
Preferably, described flocculation agent is disclosed hydrophobic cation polymeric flocculant in CN 101618937B, and its preparation method is summarized as follows:
1. take mol ratio for (89.5-56.5): (10-40): acrylamide (0.5-3.5), MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, octadecyl vinyl ether are standby, and described three kinds of material total amounts are counted the total monomer amount;
2. the acrylamide 1. step taken and MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride add in reaction vessel, add again the urea that accounts for total monomer amount 0.5-2wt% and the cats product that accounts for total monomer amount 6-7wt%, finally add deionized water and stir, mixture in reaction vessel is dissolved, and the add-on of deionized water and total monomer amount weight ratio are (70-80): (20-30);
3. by step, mixing solutions 2. is warming up to 30-35 ℃, then adds the octadecyl vinyl ether that accounts for total monomer amount 0.5-3.5mo1% and stir in reaction vessel;
4. add the initiator of the 0.2-0.5wt% that accounts for the total monomer amount in reaction vessel 3. in step, insulation is carried out polyreaction to 30 ℃-35 ℃, obtains translucent or milky gluey product after 3-6h;
5. product is poured in acetone, makes its precipitation, after the taking-up throw out, throw out is used to ethanol extracting 24h again, obtains hydrophobic cation polymeric flocculant.
Preferably, the addition of described flocculation agent is 50-60ppm, can be for example 50.5-58ppm, 53-56ppm, 57.5-60ppm, 50ppm, 51ppm, 52ppm, 52.8ppm, 53.5ppm, 54ppm, 54.1ppm, 55ppm, 56.3ppm, 57ppm, 58ppm, 58.4ppm, 59ppm, 59.2ppm, 60ppm; Further preferred 56ppm.
Preferably, described coagulant aids is polymerize aluminum chloride.
Preferably, the addition of described coagulant aids is 80-100ppm, can be for example 80.2-98ppm, 86-93ppm, 82.5-100ppm, 80ppm, 82ppm, 84ppm, 85ppm, 86.3ppm, 88ppm, 90ppm, 91ppm, 92.8ppm, 93.5ppm, 94.1ppm, 95ppm, 96.4ppm, 97ppm, 99.2ppm, 100ppm; Further preferred 85ppm.
Flocculation sediment occurs rapidly in the mud particle that can make in mud that adds of flocculation agent and coagulant aids at short notice, has shortened concentration time.
First add the segmentation mode that adds that flocculation agent adds coagulant aids again and can guarantee that the two fully mixes with mud respectively.
Preferably, described flocculation agent and coagulant aids adopt disclosed instrument in CN 201737824U to join in mud conveying pipeline.Concentration, flow and delivery turbidity that in CN 201737824U, disclosed instrument can on-line automatic measurement feed mud, feedback signal according to concentration, flow is passed through computer settings procedure auto-control medicament add-on, by the feedback signal of water turbidity, the medicament add-on is revised in time simultaneously, greatly improve the accuracy of medicament add-on, and guarantee the delivery turbidity qualified discharge, make whole apparatus system, coordinated operation.
After the water discharge of face source, dredging silt is tentatively concentrated.
(8) operation of repeating step (7) until silt stockyard be filled with.
Preferably, the number of times of described repetition is 2-4 time, can be for example 2 times, 3 times, 4 times; More preferably 3 times.
(9) after the substrate through anaerobic fermentation 10-20d of silt stockyard bottom, will produce a large amount of bubbles, and continue to emerge from mud, now at muck surface, lay geotextile and sealing membrane.
Described substrate through anaerobic fermentation 10-20d can be for example 10d, 11d, 12d, 13d, 14d, 14.5d, 15d, 16d, 17d, 18d, 19d, 20d; Be preferably 16d.
Describedly at muck surface, lay geotextile and sealing membrane is preferably first laid 1-2 layer geotextile, then lay 1-2 layer sealing membrane on geotextile.
Preferably, before laying geotextile and sealing membrane, first on the border of silt stockyard, lay the sealing ditch of degree of depth 1m, the part grown in order to imbed sealing membrane, use the pure clay backfill after imbedding sealing membrane; Further preferably, the length of side of the side ratio silt stockyard of sealing membrane grows 5m.
(10) supervisor of vacuum lead is connected with the vacuum unit, the vacuum preloading water-pumping/draining, extract water out and be pressed on sealing membrane as burden pressure.
Preferably, the vacuum tightness >=0.08MPa of described vacuum preloading water-pumping/draining.
(11) the vacuum preloading water-pumping/draining is obvious when less to aquifer yield, stops work and checks and accepts.
Preferably, described aquifer yield is obviously less, refers to that mud face sinkability is less than 1mm continuously at least 4 days.
Above-mentioned whole process takes approximately 4 months, the mud mud containing rate after aforesaid method the is processed ratio of mud total mass (the dry shale amount with)>=72%, bearing capacity>=8t/m
2.
In sum, the technical scheme after optimization of the present invention is:
A kind of microorganism promotes the method for the quick mummification of dredging silt, comprises the steps:
(1) the biological species organism is placed in to anaerobism closed environment anaerobically fermenting, with domestication anaerobic gas generation microorganism;
(2), after having tamed, collect fermented liquid, standby after the concentration thin up according to 1-3wt%;
(3) using the biological species organism as substrate, tightly stack to form inner anaerobic environment, to substrate splash fermented liquid after step (2) dilution so that the anaerobic gas generation microbial inoculant in substrate, the mass ratio of fermented liquid and substrate is 1-2:1,7-10d becomes thoroughly decomposed at the temperature of 15 ℃-35 ℃;
(4) will complete the substrate become thoroughly decomposed and drain away the water, be sub-packed in Polywoven Bag according to the standard of 5-8kg/ bag, seal after packing;
(5) substrate of packing evenly is laid in to mummifying pool bottom, the mass ratio of substrate and mud dry weight is 0.5-1.5:100, covers fishing net on substrate, more evenly squeezes into timber or iron nail is fixed on fishing net;
(6) drain board that pre-buried aperture is 80-100 μ m in mummifying pool, the mummifying pool bottom is fixed in the drain board lower end, and the place apart from mummifying pool surface opening 1m is fixed in upper end; Each drain board is connected with arm by joint, and arm is connected with supervisor again, forms the pipe network system that vacuumizes;
(7) pending dredging silt is inputted to mummifying pool by mud conveying pipeline, in mud conveying pipeline, successively add the flocculation agent of 50-60ppm and the coagulant aids of 80-100ppm, make the mud particle flocculation precipitation in mud, discharge face source water;
(8) operation 2-4 time of repeating step (7) until mummifying pool be filled with;
(9) after the substrate through anaerobic fermentation 10-20d of mummifying pool bottom, will produce a large amount of bubbles, and continue to emerge from mud, now at muck surface, first lay 1-2 layer geotextile, then lay 1-2 layer sealing membrane on geotextile;
(10) supervisor of vacuum lead is connected with the vacuum unit, vacuum preloading water-pumping/draining under the condition of vacuum tightness >=0.08MPa, extract water out and be pressed on sealing membrane as burden pressure;
(11), when vacuum preloading water-pumping/draining to mud face sinkability is less than 1mm at least 4 days continuously, stops work and check and accept.
Technical scheme after the present invention further optimizes is:
A kind of microorganism promotes the method for the quick mummification of dredging silt, comprises the steps:
(1) the biological species organism is placed in to anaerobism closed environment anaerobically fermenting, with domestication anaerobic gas generation microorganism;
(2), after having tamed, collect fermented liquid, standby after the concentration thin up according to 2wt%;
(3) using the biological species organism as substrate, tightly stack to form inner anaerobic environment, to substrate splash fermented liquid after step (2) dilution so that the anaerobic gas generation microbial inoculant in substrate, the mass ratio of fermented liquid and substrate is 1.5:1,9d becomes thoroughly decomposed at the temperature of 30 ℃;
(4) will complete the substrate become thoroughly decomposed and drain away the water, be sub-packed in Polywoven Bag according to the standard of 7kg/ bag, seal after packing;
(5) substrate of packing evenly is laid in to mummifying pool bottom, the mass ratio of substrate and mud dry weight is 1:100, covers fishing net on substrate, more evenly squeezes into timber or iron nail is fixed on fishing net;
(6) drain board that pre-buried aperture is 90 μ m in mummifying pool, the mummifying pool bottom is fixed in the drain board lower end, and the place apart from mummifying pool surface opening 1m is fixed in upper end; Each drain board is connected with arm by joint, and arm is connected with supervisor again, forms the pipe network system that vacuumizes; Described arm and supervisor all adopt the hard plastic tube that diameter is 70mm;
(7) pending dredging silt is inputted to mummifying pool by mud conveying pipeline, in mud conveying pipeline, successively add the hydrophobic cation polymeric flocculant of 56ppm and the polymerize aluminum chloride coagulant aids of 85ppm, make the mud particle flocculation precipitation in mud, discharge face source water;
(8) operation 3 times of repeating step (7) until mummifying pool be filled with;
(9) lay in advance the sealing ditch of degree of depth 1m on the border of mummifying pool, after the substrate through anaerobic fermentation 16d of mummifying pool bottom, to produce a large amount of bubbles, and from mud, continue to emerge, now at muck surface, first lay 1-2 layer geotextile, then lay 1-2 layer sealing membrane on geotextile, the length of side of the side ratio mummifying pool of sealing membrane grows 5m, the part grown is imbedded the sealing ditch, the sealing of backfill pure clay;
(10) supervisor of vacuum lead is connected with the vacuum unit, vacuum preloading water-pumping/draining under the condition of vacuum tightness >=0.08MPa, extract water out and be pressed on sealing membrane as burden pressure;
(11), when vacuum preloading water-pumping/draining to mud face sinkability is less than 1mm at least 4 days continuously, stops work and check and accept.
The all expression processing parameters that use in specification sheets and claims, component concentration, reaction conditions etc. all are appreciated that the modification that adds term " about " in all cases.Therefore, unless point out on the contrary, in specification sheets and claims given numerical value can be according to the present invention the desired character obtained difference and change.At bottom line, and be not used in the scope that the application of Equivalent principle is defined as to claim, each numerical value should be at least according to the value of reported significant figure by using common rounding method to make an explanation.And all scopes in this announcement all are appreciated that starting point and the end point values that comprises scope, comprise arbitrarily and all being included in wherein among a small circle.For example, certain scope " 1-10 " should be considered to comprise any and among a small circle all of (being included) between minimum value 1 and maximum value 10; All initial to be more than or equal to 1 minimum value, and to be less than or equal among a small circle all that 10 maximum value finishes, 2-6 for example, 3.3-8.5, or 7.5-10.All reference of mentioning in this file all are appreciated that all and include for reference.
Compared with prior art, the present invention has following beneficial effect:
(1) cost is low.Although used the organism such as stalk, because its addition is less, expense is lower, and the mud of the residue after fermentation gas after mummification can also be recycled to make the modes such as fertilizer after being dug out.On the other hand, make the adding of flocculation agent mud be able to the rapid flocculation precipitation concentrated, adding and making in mud of aerogens forms a large amount of drainage channels, so drainage efficiency improves, and the pumpdown time shortens, and has reduced energy consumption, has reduced cost.
(2) drainage efficiency is high.In prior art, along with the carrying out vacuumized, mud is gradually reduced into fine and close state, and not only the extremely difficult continuation of remaining moisture of long processing period but also later stage is discharged.And in the inventive method, the interpolation of substrate and aerogens makes in mud and forms a large amount of drainage channels, even vacuumize the fine and close compressed state that has caused mud, in mud, a large amount of drainage channels still can promote that moisture flows out fast, coordinate again to vacuumize moisture is extracted out fast, thereby mummification mud fast; , because aerogens and substrate add in mud simultaneously, thereby can continue more than aerogenesis 3-4 month simultaneously, can meet whole construction period to form the needs of drainage channel in mud, the mud mummification sooner, more thorough.
(3) shortened the duration.Flocculation sediment occurs rapidly in the mud particle made in mud that adds of flocculation agent at short notice, tentatively concentrated at short notice mud, the time of vacuum preloading has been shortened in the formation of drainage channel, thus the duration greatly shorten, more than shortening 1/5-1/4 than the duration of existing mud mummification.
In a word, microorganism of the present invention promotes the method for the quick mummification of dredging silt, utilize the vital movement of microorganism and generation thereof gas and changing the fine and close state that forms in vacuum of mud, make mud become loose how empty, promoted flowing of moisture, thereby improved the water-pumping/draining effect of vacuum preloading, make dredging silt change even semi-solid state of plastic stage into from fluid state fast, realized the fast dewatering mummification of dredging silt, cost is low, and the duration is short.
Below in conjunction with embodiment, the present invention is described in further detail.But following embodiment is only simple and easy example of the present invention, does not represent or limit the scope of the present invention, and interest field of the present invention is as the criterion with claims.
Embodiment
For the present invention is described better, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:
Embodiment 1:
A kind of microorganism promotes the method for the quick mummification of dredging silt, adopts following steps:
(1) building interior dimensions is that 100m(is long) * 100m(is wide) * 5m(is dark) mummifying pool as silt stockyard, in the degree of depth of 5m, high 2m is piled, the about 50000m of cubic capacity in below ground excavation 3m, cofferdam
3, 2 layers of sealing membrane of inner paving are done antiseepage and are processed.
(2) take Herba Eichhorniae, straw, the cow dung that the ratio of dry mass is 1:1:0.2 is raw material, take large-scale anaerobic fermentation tank as container domestication aerogens, and acclimation temperature is 30 ℃, and solid-to-liquid ratio is 1:5.Detect the gas production rate of every day, until gas production rate, for three days on end during peaking, collect fermented liquid.
(3) repeating step (2), and regularly with fresh substrate, replace the fermentation cylinder for fermentation material to keep microbes biomass.Collect by this method totally 5 tons of fermentation seed liquids.
(4) get 500 tons, solid carbon dioxide cucurbit, evenly be divided into 5 parts, every part adds 1 ton of cow dung, mixes thoroughly.Every portion of Herba Eichhorniae is closely stacked to the inner anaerobic environment of building.Can utilize the mummifying pool of not squeezing into mud as stacking place.Every portion of Herba Eichhorniae adds 1 ton of fermentation seed liquid and 100 tons of water, and 7d becomes thoroughly decomposed at the temperature of 30 ℃.
(5) will complete the substrate become thoroughly decomposed and drain away the water, be sub-packed in Polywoven Bag according to the standard of 6-7kg/ bag, seal after packing.
(6) Polywoven Bag that substrate will be housed evenly is laid in the mummifying pool bottom, covers one deck fishing net thereon, more evenly squeeze into timber on fishing net, makes packed substrate unlikely floating, mobile after squeezing into silt slurry.
(7) be the drain board of quincunx pre-buried long 5.5m, aperture 90 μ m with the spacing of 70 * 70cm in mummifying pool, the mummifying pool bottom is fixed in the drain board lower end, and the place apart from mummifying pool surface opening 1m is fixed in upper end, notes the reserved about 1.5m in upper end.
(8) each drain board is connected with arm by joint, arm is connected with supervisor again, and described arm and supervisor all adopt the hard plastic tube that diameter is 70mm, form the pipe network system that vacuumizes.
(9) pending dredging silt is injected to mummifying pool by mud conveying pipeline, when dredging mud is flowed through pipeline, with disclosed instrument in two CN 201737824U, first add the hydrophobic cation polymeric flocculant of 56ppm to add again the polymerize aluminum chloride coagulant aids of 85ppm respectively, make mud flocculation sediment mud extraction particle at short notice, discharge face source water.
(10) operation 3 times of repeating step (9), complete slip casting.
(11) lay in advance the sealing ditch of degree of depth 1m along the border of mummifying pool.
(12) after the substrate through anaerobic fermentation 16d of mummifying pool bottom, in mud, there are a large amount of bubbles to continue to emerge, now at muck surface, first lay 1 layer of geotextile, lay again 2 layers of sealing membrane on geotextile, four length of sides of sealing membrane all grow 5m than the length of side of mummifying pool, the part grown is imbedded the sealing ditch, the sealing of backfill pure clay, and tamping in layers is to avoid filler directly to clash into sealing membrane.
(13) check whether sealing membrane has hole, if having, glue and mend in time.
(14) supervisor of vacuum lead is connected with the vacuum unit, vacuum preloading water-pumping/draining under the condition of vacuum tightness >=0.08MPa, if low vacuum illustrates that in 0.08MPa Lou vacuum need check reparation, extract water out and be pressed on sealing membrane as burden pressure;
(15), when vacuum preloading water-pumping/draining to mud face sinkability is less than 1mm in continuous 4 days, stops work and check and accept.
Detect soil body ensemble average mud containing rate and bearing capacity after construction finishes, acquired results is as shown in table 1:
The mummification effect of the method for table 1 embodiment 1 to mud in stockyard
As shown in Table 1, after the processing of 126 days by a definite date, in stockyard, the average mud containing rate of mud is 72.6%, and higher than the plastic limit mud containing rate, bearing capacity reaches 10.3t/m
2, can bear general crawler-mounted excavator walking, excavation.
Embodiment 2:
A kind of microorganism promotes the method for the quick mummification of dredging silt, adopts following steps:
(1) building interior dimensions is that 100m(is long) * 100m(is wide) * 5m(is dark) mummifying pool as silt stockyard, in the degree of depth of 5m, high 2m is piled, the about 50000m of cubic capacity in below ground excavation 3m, cofferdam
3, 2 layers of sealing membrane of inner paving are done antiseepage and are processed.
(2) take Herba Eichhorniae, straw, the sheep excrement that the ratio of dry mass is 1.5:1:0.3 is raw material, take large-scale anaerobic fermentation tank as container domestication aerogens, and acclimation temperature is 30 ℃, and solid-to-liquid ratio is 1:5.Detect the gas production rate of every day, until gas production rate, for three days on end during peaking, collect fermented liquid.
(3) repeating step (2), and regularly with fresh substrate, replace the fermentation cylinder for fermentation material to keep microbes biomass.Collect by this method totally 5 tons of fermentation seed liquids.
(4) get 500 tons, solid carbon dioxide cucurbit, evenly be divided into 5 parts, every part adds 1 ton, sheep excrement, mixes thoroughly.Every portion of Herba Eichhorniae is closely stacked to the inner anaerobic environment of building.Can utilize the mummifying pool of not squeezing into mud as stacking place.Every portion of Herba Eichhorniae adds 4.5 tons of fermentation seed liquids and 150 tons of water, and 9d becomes thoroughly decomposed at the temperature of 35 ℃.
(5) will complete the substrate become thoroughly decomposed and drain away the water, be sub-packed in Polywoven Bag according to the standard of 5-6kg/ bag, seal after packing.
(6) Polywoven Bag that substrate will be housed evenly is laid in the mummifying pool bottom, covers one deck fishing net thereon, more evenly squeeze into timber on fishing net, makes packed substrate unlikely floating, mobile after squeezing into silt slurry.
(7) be the drain board of quincunx pre-buried long 5.5m, aperture 80 μ m with the spacing of 70 * 70cm in mummifying pool, the mummifying pool bottom is fixed in the drain board lower end, and the place apart from mummifying pool surface opening 1m is fixed in upper end, notes the reserved about 1.5m in upper end.
(8) each drain board is connected with arm by joint, arm is connected with supervisor again, and described arm and supervisor all adopt the hard plastic tube that diameter is 70mm, form the pipe network system that vacuumizes.
(9) pending dredging silt is injected to mummifying pool by mud conveying pipeline, when dredging mud is flowed through pipeline, with disclosed instrument in two CN 201737824U, first add the hydrophobic cation polymeric flocculant of 50ppm to add again the polymerize aluminum chloride coagulant aids of 80ppm respectively, make mud flocculation sediment mud extraction particle at short notice, discharge face source water.
(10) operation 2 times of repeating step (9), complete slip casting.
(11) lay in advance the sealing ditch of degree of depth 1m along the border of mummifying pool.
(12) after the substrate through anaerobic fermentation 10d of mummifying pool bottom, in mud, there are a large amount of bubbles to continue to emerge, now at muck surface, first lay 2 layers of geotextile, lay again 1 layer of sealing membrane on geotextile, four length of sides of sealing membrane all grow 5m than the length of side of mummifying pool, the part grown is imbedded the sealing ditch, the sealing of backfill pure clay, and tamping in layers is to avoid filler directly to clash into sealing membrane.
(13) check whether sealing membrane has hole, if having, glue and mend in time.
(14) supervisor of vacuum lead is connected with the vacuum unit, vacuum preloading water-pumping/draining under the condition of vacuum tightness >=0.08MPa, if low vacuum illustrates that in 0.08MPa Lou vacuum need check reparation, extract water out and be pressed on sealing membrane as burden pressure;
(15), when vacuum preloading water-pumping/draining to mud face sinkability is less than 1mm in continuous 4 days, stops work and check and accept.
Detect soil body ensemble average mud containing rate and bearing capacity after construction finishes, acquired results is as shown in table 2:
The mummification effect of the method for table 2 embodiment 2 to mud in stockyard
As shown in Table 2, after the processing of 131 days by a definite date, in stockyard, the average mud containing rate of mud is 73.1%, and higher than the plastic limit mud containing rate, bearing capacity reaches 10.5t/m
2, can bear general crawler-mounted excavator walking, excavation.
Embodiment 3:
A kind of microorganism promotes the method for the quick mummification of dredging silt, adopts following steps:
(1) building interior dimensions is that 100m(is long) * 100m(is wide) * 5m(is dark) mummifying pool as silt stockyard, in the degree of depth of 5m, high 2m is piled, the about 50000m of cubic capacity in below ground excavation 3m, cofferdam
3, 2 layers of sealing membrane of inner paving are done antiseepage and are processed.
(2) take stalk, straw, the chicken manure that the ratio of dry mass is 1.1:0.8:0.2 is raw material, take large-scale anaerobic fermentation tank as container domestication aerogens, and acclimation temperature is 30 ℃, and solid-to-liquid ratio is 1:5.Detect the gas production rate of every day, until gas production rate, for three days on end during peaking, collect fermented liquid.
(3) repeating step (2), and regularly with fresh substrate, replace the fermentation cylinder for fermentation material to keep microbes biomass.Collect by this method totally 5 tons of fermentation seed liquids.
(4) get 500 tons of dry straws, evenly be divided into 5 parts, every part adds 1 ton of chicken manure, mixes thoroughly.Every part of stalk is closely stacked to the inner anaerobic environment of building.Can utilize the mummifying pool of not squeezing into mud as stacking place.Every part of stalk adds 4 tons of fermentation seed liquids and 200 tons of water, and 10d becomes thoroughly decomposed at the temperature of 15 ℃.
(5) will complete the substrate become thoroughly decomposed and drain away the water, be sub-packed in Polywoven Bag according to the standard of 7-8kg/ bag, seal after packing.
(6) Polywoven Bag that substrate will be housed evenly is laid in the mummifying pool bottom, covers one deck fishing net thereon, more evenly squeeze into iron nail on fishing net, makes packed substrate unlikely floating, mobile after squeezing into silt slurry.
(7) be the drain board of quincunx pre-buried long 5.5m, aperture 100 μ m with the spacing of 70 * 70cm in mummifying pool, the mummifying pool bottom is fixed in the drain board lower end, and the place apart from mummifying pool surface opening 1m is fixed in upper end, notes the reserved about 1.5m in upper end.
(8) each drain board is connected with arm by joint, arm is connected with supervisor again, and described arm and supervisor all adopt the hard plastic tube that diameter is 70mm, form the pipe network system that vacuumizes.
(9) pending dredging silt is injected to mummifying pool by mud conveying pipeline, when dredging mud is flowed through pipeline, with disclosed instrument in two CN 201737824U, first add the hydrophobic cation polymeric flocculant of 60ppm to add again the polymerize aluminum chloride coagulant aids of 100ppm respectively, make mud flocculation sediment mud extraction particle at short notice, discharge face source water.
(10) operation 4 times of repeating step (9), complete slip casting.
(11) lay in advance the sealing ditch of degree of depth 1m along the border of mummifying pool.
(12) after the substrate through anaerobic fermentation 20d of mummifying pool bottom, in mud, there are a large amount of bubbles to continue to emerge, now at muck surface, first lay 2 layers of geotextile, lay again 2 layers of sealing membrane on geotextile, four length of sides of sealing membrane all grow 5m than the length of side of mummifying pool, the part grown is imbedded the sealing ditch, the sealing of backfill pure clay, and tamping in layers is to avoid filler directly to clash into sealing membrane.
(13) check whether sealing membrane has hole, if having, glue and mend in time.
(14) supervisor of vacuum lead is connected with the vacuum unit, vacuum preloading water-pumping/draining under the condition of vacuum tightness >=0.08MPa, if low vacuum illustrates that in 0.08MPa Lou vacuum need check reparation, extract water out and be pressed on sealing membrane as burden pressure;
(15), when vacuum preloading water-pumping/draining to mud face sinkability is less than 1mm in continuous 4 days, stops work and check and accept.
Detect soil body ensemble average mud containing rate and bearing capacity after construction finishes, acquired results is as shown in table 3:
The mummification effect of the method for table 3 embodiment 3 to mud in stockyard
As shown in Table 3, after the processing of 132 days by a definite date, in stockyard, the average mud containing rate of mud is 73.5%, and higher than the plastic limit mud containing rate, bearing capacity reaches 11.2t/m
2, can bear general crawler-mounted excavator walking, excavation.
As can be seen here, with the inventive method, process the dredging silt in stockyard, can reach the working design requirement fully, the mud after processing can reach plastic state, can carry the common mechanical walking, excavate approximately four months whole duration.Compare existing mud drying method, larger superiority is arranged, therefore there is great application and popularization value.
Should be noted that and understand, in the situation that do not break away from the desired the spirit and scope of the present invention of accompanying claim, can make to the present invention of foregoing detailed description various modifications and improvement.Therefore, the scope of claimed technical scheme is not subject to the restriction of given any specific exemplary teachings.
Applicant's statement, above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (38)
1. the method for the quick mummification of a microorganism promotion dredging silt, is characterized in that, comprises the steps:
(1) the biological species organism is placed in to anaerobism closed environment anaerobically fermenting, with domestication anaerobic gas generation microorganism;
(2), after having tamed, collect fermented liquid, standby after thin up;
(3) using the biological species organism as substrate, tightly stack to form inner anaerobic environment, to substrate splash fermented liquid after step (2) dilution so that the anaerobic gas generation microbial inoculant in substrate, become thoroughly decomposed;
(4) will complete the substrate become thoroughly decomposed and drain away the water, seal after packing;
(5) substrate of packing evenly is laid in to the silt stockyard bottom, and is fixed;
(6) pre-buried drain board in silt stockyard, be connected drain board with vacuum lead, forms the pipe network system that vacuumizes;
(7) pending dredging silt is inputted to silt stockyard by mud conveying pipeline, in mud conveying pipeline, successively add flocculation agent and coagulant aids, make the mud particle flocculation precipitation in mud, discharge face source water;
(8) operation of repeating step (7) until silt stockyard be filled with;
(9) after the substrate through anaerobic fermentation 10-20d of silt stockyard bottom, will produce a large amount of bubbles, and continue to emerge from mud, now at muck surface, lay geotextile and sealing membrane;
(10) supervisor of vacuum lead is connected with the vacuum unit, the vacuum preloading water-pumping/draining, extract water out and be pressed on sealing membrane as burden pressure;
(11) the vacuum preloading water-pumping/draining is obvious when less to aquifer yield, stops work and checks and accepts.
2. microorganism according to claim 1 promotes the method for the quick mummification of dredging silt, it is characterized in that the combination that biological species organism described in step (1) is a kind of in stalk, straw, wheat straw, Herba Eichhorniae, pig manure, cow dung, sheep excrement, horsehit, chicken manure, duck excrement or at least two kinds.
3. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, dilution described in step (2) refers to that the quality of original fermented solution in the fermented liquid after dilution accounts for 1-3wt%.
4. microorganism according to claim 3 promotes the method for the quick mummification of dredging silt, it is characterized in that, dilution described in step (2) refers to that the quality of original fermented solution in the fermented liquid after dilution accounts for 2wt%.
5. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that the combination that biological species organism described in step (3) is a kind of in stalk, straw, wheat straw, Herba Eichhorniae, pig manure, cow dung, sheep excrement, horsehit, chicken manure, duck excrement or at least two kinds.
6. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, the fermented liquid after the dilution of splashing described in step (3) and the mass ratio of substrate are 1-2:1.
7. microorganism according to claim 6 promotes the method for the quick mummification of dredging silt, it is characterized in that, the fermented liquid after the dilution of splashing described in step (3) and the mass ratio of substrate are 1.5:1.
8. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, the time of becoming thoroughly decomposed described in step (3) is 7-10d.
9. microorganism according to claim 8 promotes the method for the quick mummification of dredging silt, it is characterized in that, the time of becoming thoroughly decomposed described in step (3) is 9d.
10. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, the temperature of becoming thoroughly decomposed described in step (3) is 15 ℃-35 ℃.
11. microorganism according to claim 10 promotes the method for the quick mummification of dredging silt, it is characterized in that, the temperature of becoming thoroughly decomposed described in step (3) is 30 ℃.
12. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (4), packing is that substrate is loaded in Polywoven Bag.
13. microorganism according to claim 12 promotes the method for the quick mummification of dredging silt, it is characterized in that, the substrate of 5-8kg is housed in each Polywoven Bag.
14. microorganism according to claim 12 promotes the method for the quick mummification of dredging silt, it is characterized in that, the substrate of 7kg is housed in each Polywoven Bag.
15. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (5), the mass ratio of substrate and mud dry weight is 0.5-1.5:100.
16. microorganism according to claim 15 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (5), the mass ratio of substrate and mud dry weight is 1:100.
17. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (5), silt stockyard is mummifying pool.
18. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (5) is fixedly first to cover fishing net on substrate, more evenly squeezes into timber or iron nail on fishing net.
19. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, the aperture of drain board described in step (6) is 80-100 μ m.
20. microorganism according to claim 19 promotes the method for the quick mummification of dredging silt, it is characterized in that, the aperture of drain board described in step (6) is 90 μ m.
21. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, the silt stockyard bottom is fixed in drain board lower end described in step (6), and upper end is fixed in apart from surface opening 1m place, stockyard.
22. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (6), vacuum lead comprises arm and supervisor, arm is connected with each drain board by joint, all arms are connected with supervisor again, the common pipe network system that vacuumizes that forms.
23. microorganism according to claim 22 promotes the method for the quick mummification of dredging silt, it is characterized in that, described arm and supervisor are the hard plastic tube of diameter 70mm.
24. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (7), flocculation agent is hydrophobic cation polymeric flocculant.
25. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (7), the addition of flocculation agent is 50-60ppm.
26. microorganism according to claim 25 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (7), the addition of flocculation agent is 56ppm.
27. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (7), coagulant aids is polymerize aluminum chloride.
28. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (7), the addition of coagulant aids is 80-100ppm.
29. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, the number of times repeated described in step (8) is 2-4 time.
30. microorganism according to claim 29 promotes the method for the quick mummification of dredging silt, it is characterized in that, the number of times repeated described in step (8) is 3 times.
31. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (9), substrate through anaerobic fermentation is 16d.
32. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, described in step (9), at muck surface, lay geotextile and sealing membrane for first laying 1-2 layer geotextile, laying 1-2 layer sealing membrane on geotextile again.
33. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, in step (9) before described laying geotextile and sealing membrane, first on the border of silt stockyard, lay the sealing ditch of degree of depth 1m, the part grown in order to imbed sealing membrane, use the pure clay backfill after imbedding sealing membrane.
34. microorganism according to claim 33 promotes the method for the quick mummification of dredging silt, it is characterized in that, the length of side of the side ratio silt stockyard of sealing membrane grows 5m.
35. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that the vacuum tightness >=0.08MPa of vacuum preloading water-pumping/draining described in step (10).
36. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, aquifer yield described in step (11) is obviously less refers to that mud face sinkability is less than 1mm continuously at least 4 days.
37. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, comprises the steps:
(1) the biological species organism is placed in to anaerobism closed environment anaerobically fermenting, with domestication anaerobic gas generation microorganism;
(2), after having tamed, collect fermented liquid, standby after the concentration thin up according to 1-3wt%;
(3) using the biological species organism as substrate, tightly stack to form inner anaerobic environment, to substrate splash fermented liquid after step (2) dilution so that the anaerobic gas generation microbial inoculant in substrate, the mass ratio of fermented liquid and substrate is 1-2:1,7-10d becomes thoroughly decomposed at the temperature of 15 ℃-35 ℃;
(4) will complete the substrate become thoroughly decomposed and drain away the water, be sub-packed in Polywoven Bag according to the standard of 5-8kg/ bag, seal after packing;
(5) substrate of packing evenly is laid in to mummifying pool bottom, the mass ratio of substrate and mud dry weight is 0.5-1.5:100, covers fishing net on substrate, more evenly squeezes into timber or iron nail is fixed on fishing net;
(6) drain board that pre-buried aperture is 80-100 μ m in mummifying pool, the mummifying pool bottom is fixed in the drain board lower end, and the place apart from mummifying pool surface opening 1m is fixed in upper end; Each drain board is connected with arm by joint, and arm is connected with supervisor again, forms the pipe network system that vacuumizes;
(7) pending dredging silt is inputted to mummifying pool by mud conveying pipeline, in mud conveying pipeline, successively add the flocculation agent of 50-60ppm and the coagulant aids of 80-100ppm, make the mud particle flocculation precipitation in mud, discharge face source water;
(8) operation 2-4 time of repeating step (7) until mummifying pool be filled with;
(9) after the substrate through anaerobic fermentation 10-20d of mummifying pool bottom, will produce a large amount of bubbles, and continue to emerge from mud, now at muck surface, first lay 1-2 layer geotextile, then lay 1-2 layer sealing membrane on geotextile;
(10) supervisor of vacuum lead is connected with the vacuum unit, vacuum preloading water-pumping/draining under the condition of vacuum tightness >=0.08MPa, extract water out and be pressed on sealing membrane as burden pressure;
(11), when vacuum preloading water-pumping/draining to mud face sinkability is less than 1mm at least 4 days continuously, stops work and check and accept.
38. microorganism according to claim 1 and 2 promotes the method for the quick mummification of dredging silt, it is characterized in that, comprises the steps:
(1) the biological species organism is placed in to anaerobism closed environment anaerobically fermenting, with domestication anaerobic gas generation microorganism;
(2), after having tamed, collect fermented liquid, standby after the concentration thin up according to 2wt%;
(3) using the biological species organism as substrate, tightly stack to form inner anaerobic environment, to substrate splash fermented liquid after step (2) dilution so that the anaerobic gas generation microbial inoculant in substrate, the mass ratio of fermented liquid and substrate is 1.5:1,9d becomes thoroughly decomposed at the temperature of 30 ℃;
(4) will complete the substrate become thoroughly decomposed and drain away the water, be sub-packed in Polywoven Bag according to the standard of 7kg/ bag, seal after packing;
(5) substrate of packing evenly is laid in to mummifying pool bottom, the mass ratio of substrate and mud dry weight is 1:100, covers fishing net on substrate, more evenly squeezes into timber or iron nail is fixed on fishing net;
(6) drain board that pre-buried aperture is 90 μ m in mummifying pool, the mummifying pool bottom is fixed in the drain board lower end, and the place apart from mummifying pool surface opening 1m is fixed in upper end; Each drain board is connected with arm by joint, and arm is connected with supervisor again, forms the pipe network system that vacuumizes; Described arm and supervisor all adopt the hard plastic tube that diameter is 70mm;
(7) pending dredging silt is inputted to mummifying pool by mud conveying pipeline, in mud conveying pipeline, successively add the hydrophobic cation polymeric flocculant of 56ppm and the polymerize aluminum chloride coagulant aids of 85ppm, make the mud particle flocculation precipitation in mud, discharge face source water;
(8) operation 3 times of repeating step (7) until mummifying pool be filled with;
(9) lay in advance the sealing ditch of degree of depth 1m on the border of mummifying pool, after the substrate through anaerobic fermentation 16d of mummifying pool bottom, to there be a large amount of bubbles to continue to emerge from mud, now at muck surface, first lay 1-2 layer geotextile, lay again 1-2 layer sealing membrane on geotextile, the length of side of the side ratio mummifying pool of sealing membrane grows 5m, and the part grown is imbedded the sealing ditch, the sealing of backfill pure clay;
(10) supervisor of vacuum lead is connected with the vacuum unit, vacuum preloading water-pumping/draining under the condition of vacuum tightness >=0.08MPa, extract water out and be pressed on sealing membrane as burden pressure;
(11), when vacuum preloading water-pumping/draining to mud face sinkability is less than 1mm at least 4 days continuously, stops work and check and accept.
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| CN107010811A (en) * | 2017-04-28 | 2017-08-04 | 余思哲 | A kind of method of dredging silt fast dewatering |
| CN108178484A (en) * | 2018-01-11 | 2018-06-19 | 临沂清宇环境资源综合利用研究院有限公司 | A kind of method that sludge combined stalk powder carries out the pre- desiccation of biology |
| CN108411891A (en) * | 2018-03-15 | 2018-08-17 | 温州大学 | The method of the pre- cured barged-in fill of biological bacteria combined vacuum |
| CN108751670A (en) * | 2018-08-15 | 2018-11-06 | 江苏科技大学 | The quick sludge dewatering treatment system of negative pressure of vacuum agricultural crop straw and method |
| CN110204158B (en) * | 2019-06-28 | 2022-03-08 | 华中科技大学 | Method and equipment for quickly dehydrating, curing and stabilizing dredged polluted sediment |
| CN110593248A (en) * | 2019-09-10 | 2019-12-20 | 盐城工学院 | Method for promoting rapid dehydration of dredged fluid mud based on straw fermentation |
| CN112044929B (en) * | 2020-08-17 | 2022-09-02 | 盐城工学院 | Ecological dehydration and straw drainage body degradation method for fluid mud storage yard and straw drainage body |
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