CN103641223B - Method for repairing black and odorous water caused by aquatic plant decay in lake - Google Patents
Method for repairing black and odorous water caused by aquatic plant decay in lake Download PDFInfo
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- CN103641223B CN103641223B CN201310673377.9A CN201310673377A CN103641223B CN 103641223 B CN103641223 B CN 103641223B CN 201310673377 A CN201310673377 A CN 201310673377A CN 103641223 B CN103641223 B CN 103641223B
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Abstract
The invention discloses a treatment method of yellow or even black and odorous water caused by aquatic plant decay. Most of organic black colloids in water are settled by a composite flocculant, and a smelly substance residue remaining in the water is further deeply oxidized and degraded by using a composite oxidation deodorization material. The composite flocculant takes 10-50 microns of natural quartz sand as a core, and the quartz sand is subjected to surface modification by using CaCl2 and chitosan after pretreatment such as crushing, acidifying, firing and the like, so as to prepare an efficient composite flocculant. The comprehensive repair method provided by the invention is good in oxide removal effect on black and odorous substances of general water, such as sulfide protein, ammonia, amine and the like, and the removal rate is 70-90%. More importantly, the removal effect on a lot of vegetal fatty acids, nitro-compounds and indole odorous substances is 70-85%. The transparency and dissolved oxygen of the processed water are greatly improved, the sensory effects of the water are effectively improved, and a water-sediment interface microenvironment of local water is significantly improved.
Description
Technical field
The invention belongs to environmental technology field, relate to the restorative procedure of black and odorous water after a kind of lake aquatic plant corruption, particularly relate to the method for disposal that in a kind of water body, " careless source property " causes smelly sulfur-bearing, nitrogenous compound is efficiently removed.
Background technology
Near the bank band of arm of lake shore, lake, grow a large amount of emergent and floatingleaved plant and submerged plant.Due to pasture and water vitellarium plant associations in the form of sheets or zonal arrangement, pasture and water coverage area vegetation water power in great numbers exchange capacity is poor, settling top layer is composed and is deposited a large amount of plant residue and be rich in organic matter, vegetation region is caught and be have accumulated in water and grown a large amount of planktonic organism and bacterium around suspended particulate and blue-green algae, vegetation cauline leaf and root system, water body plant was become feeble and die in a large number or met typhoon and causes a large amount of pasture and water dead every summer and autumn, often discharged in great amount of soluble easily biodegradable organics, its decomposition course to exhaust most of dissolved oxygen in water body and cause water hypoxia; Plant decay also discharges low the containing of partial solubility and dredges base and amino group compound in addition, and easily form water membrane in water surface, this layer of organic membrane covers the water surface, has blocked water body and atmospheric water_air exchange speed to some extent; Cause water body under the condition of anoxic, even anaerobic under both donor effects, in plant residue and settling, organic substance decomposing produces the low molecular easy volatile foul gass such as a large amount of hydrogen sulfide, ammonia, thioether, and this is one of major reason causing black and odorous water.
Administer for black and odorous water at present and mainly concentrate on tap water, mainly comprise and utilize oxidation style as O
3, KMnO
4, Cl
2, ClO
24 kinds of removals such as conventional oxidant oxidation sulfur alcohol, Geosmin, MIB etc., and absorption method such as gac, attapulgite, diatomite etc. smell material removal effect to causing.And rot and black smelly bed mud initiation black and odorous water about the black smelly improvement of water body in lake just tentatively relate to blue-green algae, corresponding measure comprises lake dredging, aeration, changes the engineering measures such as water, and for the pollution Synthetical prevention of black and odorous water that plant corruption produces, relevant deodorization technology research is obviously not enough, even lack, and the technology of being correlated with about pasture and water are corrupt rarely has report.Because pasture and water spoilage product is based on dissolved colloidal state, dissolved organic matter matter, they directly cause black and odorous water, or react with the nitrogen sulfur compound of water, deposited material the secondary metabolite formed entity also can be caused black smelly, also to cause in bed mud black sordes matter to be directly released in water body by water-soil environment causing black and odorous water by changing water body environment.For this present situation, corresponding black and odorous water joint disposal technology just must consider metabolic intermediate and the final product efficient removal simultaneously of careless source property black and odorous water material, the microenvironment of the local anaerobic of remarkable change water body simultaneously.
" endogenous " the black smelly release that " the algae source property " that formed and the black smelly substance release of bed mud formed of rotting of the corrupt district of pasture and water " careless source property is black smelly " and blue-green algae is significantly different, the latter's odor causing substance is mainly distributed in frustule, organic particulate matter and fine sediment suspended substance, black sordes matter is mainly thioether protein, ammonia, amine etc., not by factors such as waterplant in project implementing process.And the former black sordes matter is mainly discharged into the organism in water body after plant decay, mainly exist with dissolved colloidal state and solubilised state form, corresponding technical measures must consider the lake ecosystem security of pasture and water district.Say from handling object, pasture and water corruption produces the specific properties that black smelly process must take into full account the black smelly source of waterplant, not only there are the materials such as thioether protein, ammonia, amine, the more important thing is containing a large amount of fatty acids, nitro-compound and indoles Taste and odor compounds technical difficulty higher, the safety standards implemented is more strict, and this just needs more scientific, efficient, safe technological method to meet this new environmental problem.
Summary of the invention
The invention discloses a kind of composite flocculation agent for water treatment, and utilize this composite flocculation agent to cause the administering method of black and odorous water to plant decay, be specially composite flocculation agent and oxidic compound deodoring materials waters, comprehensive regulation lake body " careless source property " local black smelly in application.By organic blackening colloid most of in composite flocculation agent sedimentation water body, utilize the odor causing substance that oxidic compound deodoring materials further deep oxidation degraded water body is remaining.
Namely the first object of the present invention is to provide a kind of compound flocculation agent for water treatment, and described compound flocculation agent is adopted and is prepared from the following method:
acidifying: by natural siliceous sand 10 ~ 50%HCL of collecting or HNO
3(V/V) soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 450 ~ 600 DEG C of calcination 4 ~ 10h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 200 orders to 1250 orders is for subsequent use;
surface modification: get 200 ~ 1250 order quartz sands by 1:5 ~ 10 solid-to-liquid ratio and 10 ~ 35% CaCl
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 60 ~ 80 DEG C after leaving standstill; Secondly, the chitosan solution of preparation quality per-cent position 1 ~ 15%, and quartz sand and chitosan solution are removed unnecessary solution according to the solid-to-liquid ratio mix and blend of 1:0.2 ~ 1.5, lyophilize obtains Powdered composite flocculation agent.
The composite flocculation agent of this uniqueness has unexpected treatment effect, can most of organic blackening colloid in sedimentation water body, and the effect coordinating oxidic compound deodoring materials of the present invention to use is especially remarkable.
Namely the second object of the present invention is to provide and utilizes above-mentioned composite flocculation agent to carry out method for comprehensive repairing to water body, the method effectively can remove more than 90% directly produced by waterplant and secondary black sordes matter, water transparency and dissolved oxygen significantly promote, and significantly improve local water environment.
For achieving the above object, the present invention adopts following technical scheme, and a kind of plant decay causes the administering method of black and odorous water, mainly comprises the following steps:
(1) blocking external source plant residue wafts into black and odorous water of getting dirty, and tentatively rejects the residual body of large-area pleuston in water body by artificial or mechanical salvaging mode;
(2) after removing plant residue, drop into composite flocculation agent in black smelly waters, make it the abundant mix and blend with water;
(3) after composite flocculation agent flocculating settling, after 0.5 ~ 2h, in black and odorous water, oxidic compound deodoring materials advanced treatment is added.
Be specially: (1) blocks external source plant residue and wafts into black and odorous water of getting dirty, and prevents from increasing the weight of water body organic pollution load, tentatively rejects the residual body of large-area pleuston in water body by artificial or mechanical salvaging mode;
(2) after removing plant residue, drop into composite flocculation agent, make it the abundant mix and blend with water in black smelly waters, the black sordes matter making most of dissolved colloidal state in water body and be partly dissolved state is by flocculating and being deposited into water bottom;
(3) after composite flocculation agent flocculating settling, after 0.5 ~ 2h, in black and odorous water, add oxidic compound deodoring materials, stink substance remaining in further oxidation removal water body, promote water transparency, increase Dissolved Oxygen in Water level.
Method of the present invention, in step 2, it is every premium on currency 20 ~ 300mg L that composite flocculation agent adds consumption
-1, add natural subsidence 0.5 ~ 3 h under rear hydrostatic condition.
Processing water temp in preferred rate-determining steps 2 is 15 ~ 40 DEG C, and this temperature is conducive to guaranteeing treatment effect further.
Due to composite flocculation agent of the present invention with micron-sized quartz sand for flocculation core, therefore do not exist secondary pollution without the need to reclaim.When processing water turbidity at 50 ~ 400NTU, under hydrostatic condition, water body is after 0.5 ~ 3 h natural subsidence, and water turbidity declines 65 ~ 90%, and the higher effect of turbidity is more obvious, and water transparency is greater than 80cm.
Method of the present invention, in step 3, the charging capacity of oxidic compound deodoring materials is 50 ~ 800mg L
-1, add and to be fully uniformly mixed afterwards, more than natural subsidence 10min, as 10min-2h.
Wherein, the process water temp of preferred oxidic compound deodoring materials is similarly 10 ~ 45 DEG C, and the charging capacity of oxidic compound deodoring materials is 200 ~ 500mg L
-1, when water body Taste and odor compounds with nitride for time main, can consider suitably to increase dosage; Add and to be fully uniformly mixed afterwards, after the natural subsidence of 10min ~ 2h, Dissolved Oxygen in Water level brings up to 80 ~ 95%, and water turbidity is less than 10 NTU.
Method of the present invention, is applicable to emergent, storehouse, lake water body that submerged plant, floatingleaved plant big area rot to cause black and odorous water, and especially floating heart belongs to, a large amount of plant residue of p.malaianus platymiscium rots to cause the black smelly water body of big area.
Wherein, compound flocculation agent of the present invention is adopted and is prepared from the following method:
acidifying: by natural siliceous sand 10 ~ 50%HCL of collecting or HNO
3(V/V) soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 450 ~ 600 DEG C of calcination 4 ~ 10h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 200 orders to 1250 orders is for subsequent use;
surface modification: get 200 ~ 1250 order quartz sands by 1:5 ~ 10 solid-to-liquid ratio and 10 ~ 35% CaCl
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 60 ~ 80 DEG C after leaving standstill; Secondly, the chitosan solution of preparation quality per-cent position 1 ~ 15%, and quartz sand and chitosan solution are removed unnecessary solution according to the solid-to-liquid ratio mix and blend of 1:0.2 ~ 1.5, lyophilize obtains Powdered composite flocculation agent.
Wherein preferred:
acidifying: by natural siliceous sand 30 ~ 40%HCL of collecting or HNO
3(V/V) soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 500 ~ 550 DEG C of calcination 6 ~ 8h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 600 orders to 850 orders is for subsequent use;
surface modification: get 600 ~ 850 order quartz sands by 1:6 ~ 8 solid-to-liquid ratio and 20 ~ 30% CaCl
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 70 ~ 80 DEG C after leaving standstill; Secondly, the chitosan solution of preparation quality per-cent position 5 ~ 10%, and quartz sand and chitosan solution are removed unnecessary solution according to the solid-to-liquid ratio mix and blend of 1:0.8 ~ 1.2, lyophilize obtains Powdered composite flocculation agent.
The concrete consumption of the composite flocculation agent prepared according to the method described above is little, and (using dosage is at 50 ~ 100mg L
-1), cost low (quartz sand cheap and surface modifying material chitosan and CaCl
2consumption I Reusability), the simple and ecological safety (CaCl of surface modifying material of pre-treatment
2be material common in natural water, chitosan is biodegradable polysaccharose substance, and consumption seldom can be ignored to the contribution of water body TOC) feature, for the process of dissolved colloidal state material in black and odorous water, there is feature rapidly and efficiently.
Oxidic compound deodoring materials of the present invention by 5 ~ 40% Ca (NO
3)
2with 15 ~ 60% 2Na
2cO
33H
2o
2with the flyash of 5 ~ 20% and the CaSiO of solidifying agent 5 ~ 20%
3composition, preferably by 20 ~ 30% Ca (NO
3)
2with 25 ~ 50% 2Na
2cO
33H
2o
2with the flyash of 10 ~ 15% and the CaSiO of solidifying agent 10 ~ 20%
3composition.
20 ~ 100 object powder after each component of above-mentioned oxidic compound deodoring materials is and pulverizes.
The present invention has taken into full account that the black sordes matter of vegetalitas composes the feature of depositing, this method for comprehensive repairing solves the environmental requirement that water body becomes cleer and peaceful oxygen enrichment two aspect targetedly, consider the impact on water transparency of material itself in addition, in the selection of subsidiary material component, fully take into account the factors such as the density of material own, color, solvability and to the passivation of black sordes matter intermediate product and secondary metabolite or eliminating effect.
Beneficial effect of the present invention: the method for comprehensive repairing of matrix material provided by the invention and product can effectively improve water body sensory effects, while significantly reducing water body Taste and odor compounds, improve water transparency, promote Dissolved Oxygen in Water level, and improve the local microenvironment of water body and surface deposit.The removal be hopeful river and lake local vegetation black and odorous water material can be played good regulation effect by corresponding finished product.
Compared with the minimizing technology of the Taste and odor compounds of traditional waterworks, they generally adopt catalytic ozonation, H
2o
2oxidation, Ca (NO
3)
2the methods such as oxidation, charcoal absorption, this class methods cost is relatively high, and needs to be equipped with specific equipment as ozone machine, gac pillar etc., and when the water yield with process increases, the saturated rear effect of gac declines obviously.Aforesaid method is not suitable for the improvement of lake, field big area black and odorous water due to technical limitation.Restorative procedure provided by the invention, make its operationally breach field administer black smelly in operational technical bottleneck, material therefor is pressed powder, convenient transport and field operation, on lake, operation all uses at water field of big area by artificial spreading method, does not need special special instrument equipment.The active substance that material used is proper constituent in natural lake or water body or therefrom extracts, using dosage all tens to hundreds of milligrams per liter water, and prime cost quartz sand is conveniently easy to get, cheap.Oxidic compound deodoring materials used is good to the substance oxidation removal effect such as thioether protein, ammonia, amine in water body, clearance, 60 ~ 85%, be the more important thing is containing a large amount of fatty acids, nitro-compound and indoles Taste and odor compounds removal effect remarkable 70 ~ 90%.Meet black this new environmental problem smelly of vegetalitas to corresponding removal technological method science, efficient, safe demand.
Describe the present invention below in conjunction with specific embodiment.Protection scope of the present invention is not limited with embodiment, but is limited by claim.
embodiment
The present invention causes water body anaerobism, the dirty smelly polluted water body that even turns black to process plant decay, illustrate that restorative procedure provided by the invention is to the repairing effect of water body and embodiment, but range of application of the present invention is not limited thereto.
Embodiment 1: prepare composite flocculation agent
Adopt and be prepared from the following method:
acidifying: by natural siliceous sand 30%HCL or HNO collected
3(V/V) soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 500 DEG C of calcination 8h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 600 orders to 700 orders is for subsequent use;
surface modification: get 600 ~ 700 order quartz sands by 1:6 solid-to-liquid ratio and 20% CaCl
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 70 DEG C after leaving standstill; Secondly, the chitosan solution of preparation quality per-cent position 5%, and quartz sand and chitosan solution are removed unnecessary solution according to the solid-to-liquid ratio mix and blend of 1:0.8, lyophilize obtains Powdered composite flocculation agent.
Embodiment 2: prepare composite flocculation agent
Adopt and be prepared from the following method:
acidifying: by natural siliceous sand 40%HCL or HNO collected
3(V/V) soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 550 DEG C of calcination 6h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 750 orders to 850 orders is for subsequent use;
surface modification: get 750 ~ 850 order quartz sands by 1:8 solid-to-liquid ratio and 30% CaCl
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 80 DEG C after leaving standstill; Secondly, the chitosan solution of preparation quality per-cent position 10%, and quartz sand and chitosan solution are removed unnecessary solution according to the solid-to-liquid ratio mix and blend of 1:1.2, lyophilize obtains Powdered composite flocculation agent.
Embodiment 3: prepare composite flocculation agent
Adopt and be prepared from the following method:
acidifying: by natural siliceous sand 10%HCL or HNO collected
3(V/V) soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 450 DEG C of calcination 10h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 200 orders to 450 orders is for subsequent use;
surface modification: get 200 ~ 450 order quartz sands by 1:5 solid-to-liquid ratio and 10% CaCl
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 60 DEG C after leaving standstill; Secondly, the chitosan solution of preparation quality per-cent position 1%, and quartz sand and chitosan solution are removed unnecessary solution according to the solid-to-liquid ratio mix and blend of 1:0.2, lyophilize obtains Powdered composite flocculation agent.
Embodiment 4: prepare composite flocculation agent
Adopt and be prepared from the following method:
acidifying: by natural siliceous sand 50%HCL or HNO collected
3(V/V) soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 600 DEG C of calcination 4h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 1000 orders to 1250 orders is for subsequent use;
surface modification: get 1000 ~ 1250 order quartz sands by 1:10 solid-to-liquid ratio and 35% CaCl
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 80 DEG C after leaving standstill; Secondly, the chitosan solution of preparation quality per-cent position 15%, and quartz sand and chitosan solution are removed unnecessary solution according to the solid-to-liquid ratio mix and blend of 1:1.5, lyophilize obtains Powdered composite flocculation agent.
Embodiment 5 oxidic compound deodoring materials
Oxidic compound deodoring materials described in the present embodiment by 25% Ca (NO
3)
2with 50% 2Na
2cO
33H
2o
2with the flyash of 10% and the CaSiO of solidifying agent 15%
3composition, wherein, 20 ~ 100 object powder after each component is and pulverizes.
Embodiment 6 oxidic compound deodoring materials
Oxidic compound deodoring materials described in the present embodiment by 20% Ca (NO
3)
2with 60% 2Na
2cO
33H
2o
2with the flyash of 5% and the CaSiO of solidifying agent 15%
3composition, wherein, 20 ~ 100 object powder after each component is and pulverizes.
Embodiment 7 oxidic compound deodoring materials
Oxidic compound deodoring materials described in the present embodiment by 40% Ca (NO
3)
2with 25% 2Na
2cO
33H
2o
2with the flyash of 20% and the CaSiO of solidifying agent 15%
3composition, wherein, 20 ~ 100 object powder after each component is and pulverizes.
Embodiment 8 oxidic compound deodoring materials
Oxidic compound deodoring materials described in the present embodiment by 30% Ca (NO
3)
2with 35% 2Na
2cO
33H
2o
2with the flyash of 15% and the CaSiO of solidifying agent 20%
3composition, wherein, 20 ~ 100 object powder after each component is and pulverizes.
Embodiment 9: pasture and water rot after anaerobism, black and odorous water reparation
In the waters of Taihu Lake floating heart, p.malaianus, hydrilla verticillata riotous growth, after Waterlog in Rough Sea, water body is composed and is deposited a large amount of plant residue, choose pasture and water district plant residue, lake water and original position bed mud in indoor water tank, carry out simulation cultivation, after through one section time, in water tank, Dissolved Oxygen in Water saturation ratio is less than 40%, water transparency is less than 30cm, and water quality dirt is smelly.Mainly take following steps to improve water quality:
(1) plant residue of artificial salvaging mode residue in water is first adopted.
(2) in water, sow micron-sized Modified Quartz Sand composite flocculation agent (being prepared by embodiment 1) of the present invention, charging capacity is 150 ~ 200mg L
-1and continuous stirring and evenly mixing, in water body after most suspended substances sedimentation, add the oxidic compound deodoring materials (being prepared by embodiment 6) of compound, be uniformly mixed, make the concentration being oxidized deodoring materials in water body reach 200 ~ 300mg L after 30min
-1.
(3), after leaving standstill 2h, surface water saturation dissolved oxygen is greater than 90%, and interface saturation dissolved oxygen reaches 75%.Water body thioether class total removal rate is greater than 80%, and fatty acid clearance is 75%, nitro-compound and indoles Taste and odor compounds clearance 80%.Transparency improves 1 ~ 2.4 times.COD in water body
crclearance reaches more than 80%, and ammonia nitrogen removal frank reaches 75%.Water quality overall organoleptic Be very effective improves.
Comparative example 1
The water body identical with embodiment 1, adopt single-activity charcoal or ozone oxidation or its combination process, to water body sulphur ether material, ammonia, amine clearance 70 ~ 90%, but to fatty acid, nitro-compound and indoles Taste and odor compounds removal efficiency 25 ~ 40%, 30% is less than to ammonia nitrogen removal.Water transparency is without noticeable change.
Above-mentioned experimental data illustrates, described in the embodiment of the present invention 1, obvious processing effect is better than conventional treatment method.
Embodiment 10: the reparation of anaerobism, dark yellow water body behind river course after Pig-raising discharge of wastewater
The broken end creek river course, rural area choosing Jiaxing City, Zhejiang Province Pig raising wastewater and domestic sewage in rural areas discharge is tested, and collects this river course river and disposes.Measure Dissolved Oxygen in Water surface water saturation dissolved oxygen lower than 40% through field instrumentation, water turbidity is 60NTU, and transparency is less than 30cm, dirty smelly in water body.Utilize columnar sampler to gather this water course in situ bed mud to test, the composite flocculation agent (being prepared by embodiment 2) first adding modification flocculates, and charging capacity is 50-100mg L
-1and constantly stir, add oxidic compound deodoring materials (being prepared by embodiment 7) after leaving standstill half an hour and test, charging capacity is 100-150mg L
-1, limit edged stirs.After 2h, gather water sample monitor.Found that, the substance oxidation removal effects such as Taste and odor compounds thioether protein, ammonia, amine are good, and clearance, 75%, be the more important thing is containing a large amount of vegetal fatty acids, nitro-compound and indoles Taste and odor compounds removal effect remarkable 80%; Dissolved Oxygen in Water saturation ratio is greater than 90%, and turbidity is less than 10NTU, COD in water body
crclearance reaches more than 80%, ammonia nitrogen removal frank 80%.
Comparative example 2
Compared with embodiment 2, being only that this enforcement adopts and adding 10mg L of difference
-1pAC flocculation agent replaces composite flocculation agent, utilizes aeration or CaO
2replace oxidic compound deodoring materials.Result shows that thioether class is repaiied as material total removal rate is 70%, and it is poor to the water body effect that turbidity is low that nitro-compound and indoles Taste and odor compounds removal effect are only 50%, PAC, water turbidity 15 NTU, and Dissolved Oxygen in Water saturation ratio is 80%.Water body sense organ makes moderate progress, but water body still has residual color to be light yellow.
Above-mentioned experimental data illustrates, described in the embodiment of the present invention 2, obvious processing effect is better than conventional treatment method.
Except the record of above-described embodiment, those skilled in the art can predict, adopt arbitrary composite flocculation agent in embodiment 1-4, and the arbitrary oxidic compound deodoring materials of embodiment 5-8, according to the treatment process (including, but not limited to embodiment 9-10) recorded in specification sheets, can both the object of the invention be realized, realize and embodiment 9,10 close technique effects, length limit, and no longer enumerates herein.
Claims (8)
1., for a composite flocculation agent for water treatment, adopt and be prepared from the following method:
acidifying: by HCL or HNO of natural siliceous sand volume percent 10 ~ 50% collected
3soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 450 ~ 600 DEG C of calcination 4 ~ 10h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 200 orders to 1250 orders is for subsequent use;
surface modification: getting 200 ~ 1250 order quartz sands by 1:5 ~ 10 solid-to-liquid ratio and mass percent is the CaCl of 10 ~ 35%
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 60 ~ 80 DEG C after leaving standstill; Secondly, preparation quality per-cent is the chitosan solution of 1 ~ 15%, and will through CaCl
2modification dried quartz sand and chitosan solution according to 1:0.2 ~ 1.5 solid-to-liquid ratio mix and blend and remove unnecessary solution, lyophilize obtains Powdered composite flocculation agent.
2. utilize the composite flocculation agent described in claim 1 to administer the method that plant decay causes black and odorous water, it is characterized in that, comprise the following steps:
(1) blocking external source plant residue wafts into black and odorous water of getting dirty, and tentatively rejects the residual body of large-area pleuston in water body by artificial or mechanical salvaging mode;
(2) after removing plant residue, drop into composite flocculation agent in black smelly waters, make it the abundant mix and blend with water;
(3) after composite flocculation agent flocculating settling 0.5 ~ 2h, in black and odorous water, oxidic compound deodoring materials advanced treatment is added.
3. method according to claim 2, is characterized in that: in step 2, and it is every premium on currency 20 ~ 300mg L that composite flocculation agent adds consumption
-1.
4. method according to claim 2, is characterized in that: in step 3, and the charging capacity of oxidic compound deodoring materials is 50 ~ 800mg L
-1, add and to be fully uniformly mixed afterwards, more than natural subsidence 10min.
5. method according to claim 2, is characterized in that: described composite flocculation agent is adopted and is prepared from the following method:
acidifying: be 30 ~ 40%HCL or HNO by the natural siliceous sand volume percent collected
3soak 24h, then repeatedly rinse well with clear water, removal of impurities;
calcination: by the quartz sand that cleans up at 500 ~ 550 DEG C of calcination 6 ~ 8h;
pulverize: ground by the quartz sand after calcination, sieve, the component chosen wherein between 600 orders to 850 orders is for subsequent use;
surface modification: getting 600 ~ 850 order quartz sands by 1:6 ~ 8 solid-to-liquid ratio and mass percent is the CaCl of 20 ~ 30%
2the aqueous solution carries out stirring and evenly mixing, filters supernatant liquor, and the quartz sand after settlement separate is carried out drying at 70 ~ 80 DEG C after leaving standstill; Secondly, preparation quality per-cent is the chitosan solution of 5 ~ 10%, and will through CaCl
2modification dried quartz sand and chitosan solution according to 1:0.8 ~ 1.2 solid-to-liquid ratio mix and blend and remove unnecessary solution, lyophilize obtains Powdered composite flocculation agent.
6. method according to claim 2, is characterized in that: described oxidic compound deodoring materials by 5 ~ 40% Ca (NO
3)
2with 15 ~ 60% 2Na
2cO
33H
2o
2with the flyash of 5 ~ 20% and the CaSiO of solidifying agent 5 ~ 20%
3composition.
7. method according to claim 6, is characterized in that: described oxidic compound deodoring materials by 20 ~ 30% Ca (NO
3)
2with 25 ~ 50% 2Na
2cO
33H
2o
2with the flyash of 10 ~ 15% and the CaSiO of solidifying agent 10 ~ 20%
3composition.
8. method according to claim 2, is characterized in that: 20 ~ 100 object powder after each component of oxidic compound deodoring materials is and pulverizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310673377.9A CN103641223B (en) | 2013-12-12 | 2013-12-12 | Method for repairing black and odorous water caused by aquatic plant decay in lake |
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|---|---|---|---|
| CN201310673377.9A CN103641223B (en) | 2013-12-12 | 2013-12-12 | Method for repairing black and odorous water caused by aquatic plant decay in lake |
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| CN103641223A CN103641223A (en) | 2014-03-19 |
| CN103641223B true CN103641223B (en) | 2014-12-31 |
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| CN106277622A (en) * | 2016-08-31 | 2017-01-04 | 云南能投生态环境科技有限公司 | A kind of restorative procedure of body eutrophication |
| CN107188367A (en) * | 2017-06-08 | 2017-09-22 | 湖南文理学院 | A kind of administering method of black smelly waste water |
| CN107159102A (en) * | 2017-06-20 | 2017-09-15 | 武汉钢铁有限公司 | Small watershed black and odorous water restorative procedure |
| CN108101303A (en) * | 2017-12-21 | 2018-06-01 | 中国科学院南京地理与湖泊研究所 | A kind of lakeshore wetland accumulation cyanobacteria and the method for suspended matter harmless treatment |
| CN108734375B (en) * | 2018-04-03 | 2021-06-25 | 中国科学院南京地理与湖泊研究所 | Method for estimating contribution rate of salvage engineering to lake aquatic vegetation group change |
| CN115057508B (en) * | 2022-05-10 | 2023-06-23 | 同济大学 | Preparation method of quartz sand dead-weight flocculant |
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| CN1769198B (en) * | 2005-09-05 | 2012-07-11 | 中国科学院生态环境研究中心 | Method for transferring water bloom to water-bed plant using clay agglomeration |
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