CN109071293A - The recovery method of heavy metal sewage sludge - Google Patents
The recovery method of heavy metal sewage sludge Download PDFInfo
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- CN109071293A CN109071293A CN201680070168.7A CN201680070168A CN109071293A CN 109071293 A CN109071293 A CN 109071293A CN 201680070168 A CN201680070168 A CN 201680070168A CN 109071293 A CN109071293 A CN 109071293A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of recovery methods of heavy metal sewage sludge, in industrial sludge of the processing containing heavy metal, it is first placed in electrolysis device and is powered, so that heavy metal ion is deposited on cathode carrier on sludge, recycle filter-pressing device that the attached moisture content contained in sludge is discharged, heating evaporation can be carried out to residual moisture content in sludge by drying unit, so that sludge is in bulk, reuse the organic aqueous solutions of polymers of blocky Sludge Surface sprinkling that spray profit is installed on tool residual temperature, the moisture content of organic polymer aqueous solution is evaporated because touching the residual temperature of blocky sludge, its organic polymer is attached to blocky Sludge Surface, the blocky sludge for adhering to organic polymer is worn by tiny shape spare by grinder again, and it is mixed in tiny shape spare in soluble coagulant, complete biological agent regeneration, for put into again containing in heavy metal industrial effluent into Row recycles, and does not generate additional sludged waste material, and then reduces the manufacturing cost of biological agent and reduce harm of the heavy metal sewage sludge to environment.
Description
The present invention relates to a kind of recovery methods of heavy metal sewage sludge, this method is according to industrial wastewater heavy metal analysis result, appropriate powdery biological agent is put into industrial wastewater, after adsorbing heavy metal, it is recycled respectively again, its industrial wastewater can be recycled internal sludge circulation using heavy metal sewage sludge recovery method, and biological agent is made in sludge again, generate industrial wastewater without waste.
With making rapid progress for science and technology, the factory of many manufacture high-tech electronics, electric product, constantly research and development manufacture various new product, to provide people in work or daily life using high-tech electronics, electric product, and in high-tech electronic, the manufacture of electric product, process, such as manufacture of semiconductor, panel procedure for processing or metal surface working process, plating etc., it can all generate a large amount of industrial wastewater；And in traditional industry manufacture processing, such as machine shop, blacksmith shop, steel mill or Foundry Works etc., also many industrial wastewaters can all be generated, then whether high-tech processing or traditional industry manufacture industrial wastewater caused by processing etc., all because containing a large amount of heavy metal and toxic, nuisance etc., cause industrial wastewater color pitch-black, tanginess, if directly being drained into rivers and creeks, sea directly buries processed sludge, soil will then be caused, animals and plants, the serious influence such as the food chain of water source and big marine creature, inhabitation to the mankind, living space etc. generates serious harm, therefore cause the attention of the World Health Organization, discharge for industrial wastewater, extremely stringent standard is stipulated, it harmful substance containing band must can reduce in industrial wastewater, it reduces, avoid environment, the pollution such as air.
Furthermore, at present in the remaining processing sequences of industrial wastewater before discharging, basic agent would generally be added in industrial wastewater, the chemical agents such as heavy metal supplementary set agent, pollutant is adsorbed in industrial wastewater by the chemical agent of investment, then coagulated material is added in industrial wastewater, and the sediment dissolved out in industrial wastewater is set to give concentrating and precipitating using precipitation concentration device, then the sediment of concentration is subjected to dewatering operation by filter devices such as filter presses, it is via concentration, precipitating, remaining substance is sludge after the processing operation such as dehydration, sludge can be connect to the lower processing for carrying out the waste such as filling.
However, effectively harmful exhaust gas, waste water, waste etc. can not be completely eliminated really during Industrial Wastewater Treatment, it and is only that be processed to can be in received range to trade waste discharge standard, so the sludge generated can still clear mechanism by specific responsibility, removing is handled in accordance with the law, the hiding risk in its behind is such as: arbitrarily throwing aside, buries the caused contamination hazard to regional water quality or soil, or is the failure to smooth legal transport at removing
Reason area and the waste of resource etc. are all that current various method for sludge treatment can not solve.
Therefore, the above-mentioned problems of the prior art and missing how are solved, the direction that relevant manufactures engaged in this industry urgently study improvement is become.
Summary of the invention
Therefore inventor is in view of the above-mentioned deficiency, then collects related data, via multi-party assessment and consideration, and based on years of experience accumulated in this industry, through continuous trial and modification, final design goes out heavy metal sewage sludge of the present invention and obtains recovery method.
It is a primary object of the present invention to be detected by heavy metals detection method for industrial wastewater, industrial wastewater after detection puts into biological agent to adsorb the metal ion in industrial wastewater, sludge coagulation sedimentation phenomenon is generated simultaneously, it is then directed between the positive carrier and cathode carrier for being installed with electrolysis device, and it is powered, so that the metal ion on sludge generates free state and is deposited on cathode carrier, the sludge that industrial wastewater and precipitating generate is subjected to dewatering operation using filter device again, will be discharged in waste water solution and sludge containing attached moisture content, only leave sludge, later can be according to whether containing organic matter, drying operation is carried out to sludge using drying unit, remaining moisture content and organic component in sludge can be made to be heated and evaporate, so that drying sludge is in bulk, spray profit is reused to be installed on Organic aqueous solutions of polymers is sprayed in blocky Sludge Surface with residual warm degree, moisture content in its organic polymer aqueous solution is evaporated because of the residual temperature by block-like sludge, so that the organic polymer in organic polymer aqueous solution is attached in block-like Sludge Surface, grinding operation is carried out by grinder for the block-like sludge of attachment organic polymer again, block-like sludge to be ground into the spare of tiny shape, the spare of tiny shape is mixed by physics mode with soluble coagulant again, to produce biological agent, biological agent can be devoted again to the effectiveness for reaching in industrial wastewater and recycling, so that sludge in industrial wastewater can complete recycling and reusing, i.e. without the generation of waste, its manufacturing cost that can not only reduce biological agent, and it is also not required to arrange sludge with being carried to discharge by the vehicles It puts, the cost in transport can be reduced, and then reach reduction whole production cost, environmentally hazardous purpose.
Secondary objective of the invention is that the biological agent is with the function for absorbing heavy metal ions in water, can by electrochemical reducting reaction caused by electrolysis device by the metal ion deposition being adsorbed on biological agent on electrolysis device, making the content of the heavy metal ion in its industrial wastewater will be greatly reduced, to achieve the purpose that meet the codes and standards of discharge, reduce environmental pollution.
Another object of the present invention is to this via sludge generated after filtration step, its main ingredient is to be accumulated by the silicon-based inorganic material in biological agent, it can't a large amount of adsorption moistures because of silicon-based inorganic material, so when the sludge as made of its accumulation carries out drying operation, the time of drying can be reduced, to reach reduction drying unit
The purpose of spent electric power.
Fig. 1 is the step flow chart of present pre-ferred embodiments；
Fig. 2 is the step flow chart (one) of another embodiment of the present invention；
Fig. 3 is the step flow chart (two) of another embodiment of the present invention.
To reach above-mentioned purpose with effect, with reference to the accompanying drawing and preferred embodiment is as follows to feature and function elaborates such as the methods of the technology used in the present invention means and its construction, implementation, so that those skilled in the art understand the present invention completely.
It please refers to shown in Fig. 1, for the step flow chart of present pre-ferred embodiments, by being clear that as shown in the figure, heavy metal sewage sludge recovery method of the invention is the recovery processing operation for industrial wastewater, it is to detect content of beary metal first with heavy metals detection method in its industrial wastewater, it is put into industrial wastewater powdered, the biological agents such as graininess or block heavy stone used as an anchor shape adsorb the substances such as the heavy metal ion in industrial wastewater, so that industrial wastewater generates coagulation sedimentation phenomenon and generates sludge and aqueous solution, and the aqueous solution except sludge will meet the standard value of environmental emission, it is handled further in accordance with the following steps implementation:
(100) biological agent is put into industrial wastewater, coagulation sedimentation effect is then generated in industrial wastewater, and then sludge is formed in industrial wastewater, the positive carrier of electrolysis device is installed in industrial wastewater and cathode carrier and is powered, its electrolysis device generates redox reaction in industrial wastewater, the heavy metal ion depended on sludge is generated free state and is deposited on cathode carrier and the heavy metal ion of deposition can be collected recycling, so that no longer containing with heavy metal substance or harmful substance etc. in industrial wastewater, as the waste water solution for meeting discharge standard.
(101) dewatering operation will be carried out using filter device via the processed industrial wastewater of electrolysis device and sludge again, the waste water solution discharge of discharge standard value will be met, and contained attached moisture content is also discharged therewith in sludge, only leaves the sludge that water content is default value.
(102) whether can contain organic substance according in sludge after, drying unit is recycled to carry out drying operation to the sludge that water content is default value with default temperature, contained attached moisture content and organic component in sludge can be made to be heated at high temperature and be evaporated, so that drying sludge is in bulk.
(103) reuse spray profit device (such as water sprinkler, water jet, atomizer or liquid distribution) in sprayed in block-like Sludge Surface effective biotic component content be default value a small amount of organic polymer aqueous solution, it is organic
A small number of moisture content in aqueous solutions of polymers are evaporated because of the residual temperature by block-like sludge, so that the organic polymer in organic polymer aqueous solution is attached in block-like Sludge Surface.
(104) the block-like sludge for being attached with organic polymer can be come to carry out grinding operation by grinder, block-like sludge is ground into powder or the spare of the shapes such as graininess.
(105) to be mixed the spares such as powdered or graininess with the soluble coagulant of powdered or graininess etc., to produce powdered, graininess or block heavy stone used as an anchor shape etc. for the biological agent in investment industrial wastewater.
It is in color method or electrochemical methods that above-mentioned industrial wastewater detection Analysis of Heavy Metal method, which is optics, it is to form colored complex or specific heavy metal reduction potential using heavy metal and special organicvisualization reagent, generally indicated with the concentration unit of ppm, such industrial wastewater detects operation, work pattern is detected for commonly industrial wastewater, and the necessary technology content of non-present invention, therefore do not give detailed description；In addition, whether sludge, which contains organic matter, to learn by COD (COD) detection, its COD refers to that the substance that can be oxidized in water carries out the amount of consumed oxidant in chemical oxidation of gold under prescribed conditions, (mg/L) is indicated with the milligram number of every liter of water consumption oxygen, also the necessary technology content of non-present invention.
Furthermore, the above-mentioned biological agent devoted in industrial wastewater is can be by silicon-based inorganic material, the inorganic or organic material that organic polymer and tool aluminium (Al) system or iron (Fe) are tied to form the nonstaining properties such as the soluble coagulant of part is blended, wherein, silicon-based inorganic material is reducible occupies 40-60% for this, organic polymer is reducible to occupy 10-20%, the soluble coagulant that tool aluminium (Al) system or iron (Fe) are tied to form part reducible occupies 30-40%, this is one of biological agent preferred embodiment applied by the present invention, non- therefore limitation biological agent of the present invention formula, composition, ratio etc.；And the silicon-based inorganic material is water-insoluble and is tied to form the soluble coagulant attachment of part for organic polymer and tool aluminium (Al) system or iron (Fe) with the inorganic material of Yu Shuizhong generation deposited phenomenon；And the organic polymer is that the polymer for biological decomposition of chelation can be generated to underwater gold category ion with high molecular weight, long chain, negatively charged characteristic；The aluminium system or iron series solubility coagulant are in water-soluble and for particle in absorption water and to generate the coagulant of deposited phenomenon again；Wherein chelation (Chelate effect) is the chemical reaction to form chelate ring with a metal ion using the multidentate ligand (such as organic polymer) of at least two coordination atoms.
Furthermore, above-mentioned silicon-based inorganic material is preferably implemented as diatomite (Diatomaceous), it but also can be in practical application, the inorganic material such as silica (Silicon dioxide), kaolin (Kaolinite), montmorillonite (Montmorillonite), vermiculite (Vermiculite) or zeolite (Zeolite)；And the organic polymer is preferably implemented as poly- Vetsin (γ-PGA；Gamma-Polyglutamic acid), it but also can be in practical application, the organic polymers such as chitosan (chitosan), polyacrylic acid (polyacrylic acid) or kayexalate [poly (sodium styrenesulfonate)]；And the aluminium system or ferric flocculant are preferably implemented
For aluminum sulfate (Al2(SO4)3), but in practical application, it also can be aluminium polychloride (PAC；PolyAluminum chloride), iron chloride (FeCl3；Ferric chloride), frerrous chloride (FeCl2；Ferrous chloride) or ferrous sulfate (FeSO4；Ferrous sulfate) etc. water-soluble and nonstaining property or nocuity substance etc. tool aluminium (Al) system or iron (Fe) be tied to form the soluble coagulant of part, this is one of biological agent preferred embodiment applied by the present invention, non-therefore limitation biological agent of the present invention formula, composition, ratio etc..
And the electrolysis device in above-mentioned steps (100) is preferably implemented as including positive carrier and cathode carrier, can be placed in positive carrier and cathode carrier in industrial wastewater and be powered so that heavy metal ion (such as Cu being attached on sludge2+, Zn2+Deng) by redox reaction to generate dissociation, and it is deposited on cathode carrier, the voltage being wherein powered is between 0.1-20 volts, and electric current is between 0.1-10 amperes, but in practical application, its electrolysis device also can further be installed with blender in industrial wastewater, the sludge in industrial wastewater can be made to be uniformly distributed, to increase the area that heavy metal ion is contacted with cathode carrier, and then the efficiency of electrolysis, and the active carbon cloth or conductive carbon cloth of tool electric conductivity also can be further pasted on positive carrier and cathode carrier respectively, its carbon cloth has biggish surface area to be contacted with heavy metal ion, further to accelerate the rate of electrolysis；And the anode carrier and cathode carrier are preferably implemented as made by least one layer of platinum plating titanium net, but in practical application, it also can be gold-plated titanium net, plating palladium titanium net or the carrier without web material shape made of chemically reactive metal plating stainless steel web material, the carrier also can be the shapes such as plate or sheet, such electrolysis device is one of preferred embodiment applied by the present invention, non- therefore limitation electrolysis device of the present invention construction, material, and the voltage and electric current that are powered can also do elastic adjustment according to practical application.
However, via the processed sludge of filter device in above-mentioned steps (101), water content default value is about 50-80%；And it includes silicon-based inorganic material (such as diatomite), organic polymer (such as PGA) and other materials (such as oil content, toluene equal solvent) that sludge composition, which is, wherein the composition of silicon-based inorganic material about occupies 60-70%, the composition of organic polymer about occupies 30-20%, the composition of other materials about occupies 10% etc..
In addition, drying unit is whether to contain organic matter according to sludge to carry out drying operation to adjust default temperature in above-mentioned steps (102), its default temperature then can be 100-600 DEG C, this is present pre-ferred embodiments, and the numerical value of non-limiting default temperature of the present invention, it can be according to practical operation situation, the height of elasticity adjustment default temperature is carried out in the temperature limited region permitted for equipment for drying depending on sludge, Changes in weather etc., such as sludge is free of organic matter, then dried using 100-200 DEG C, if sludge contains organic matter, dried using 400-600 DEG C；In addition, still can reflect content of organics according to different CODs is detected, and in drying unit acceptable temperature range, the height of elasticity adjustment drying temperature；And when sludge is heated by 400 DEG C of drying unit or more of no oxygen, the organic polymer and other substances in sludge are heated and are sintered and only leave carbon, and if sludge passes through
The drying unit of normal atmospheric environment operation is heated with 600 DEG C, and the organic polymer and other substances in sludge are heated and form carbon dioxide (CO2) and loss among air.
Again, effective biotic component content default value is about 1-10% in organic polymer aqueous solution in above-mentioned steps (103), its mixed liquor for being preferably implemented as poly- Vetsin and water, but in practical application, it also can be chitosan, polyacrylic acid or kayexalate etc. and water mixed aqueous solutions, main ingredient is identical as the organic polymer in biological agent；Then soluble coagulant is preferably implemented as aluminum sulfate in above-mentioned steps (105), but in practical application, it also can be the coagulant of the shapes such as the powdered, graininess such as aluminium polychloride, iron chloride, frerrous chloride or ferrous sulfate, main ingredient is identical as the coagulant of tool aluminium system or iron series composition in biological agent.
And above-mentioned in relation to filter device in step (101), (102), (103) and (104), drying unit, spray profit device and grinder etc. is the existing device being normally applied, the different factors such as type, device manufactured by different vendor, or there are a little operation or condition limitation etc., it can slightly be adjusted in the case where not influencing step of the present invention implementation, equipment not of the invention in this, as limitation, therefore the detailed operation mode of it will not go into details various devices, for understanding.
It should be clear from by above-mentioned implementation steps, above-mentioned heavy metal sewage sludge recovery method is when using, implementation step is first by the positive carrier for installing electrolysis device in industrial wastewater and cathode carrier and to be powered, metal ion adsorbed on sludge is deposited on the cathode carrier of electrolysis device by redox reaction, and the blender started in water simultaneously is uniformly distributed in heavy metal sewage sludge in waste water solution, to increase the area that heavy metal ion is contacted on cathode carrier, and then heavy metal ion is accelerated to be deposited on the rate on the cathode carrier of electrolysis device, after the completion of electrolysis, i.e. using filter device waste water solution to be discharged, only leave dehydrated sludge, the heavy metal ion residual of waste water solution at this time, suspended solid (SS) and COD (COD) are to meet the standard value of discharge.
Then dehydrated sludge is subjected to drying operation using drying unit, depending on the content of its temperature dried organic substance contained in the industrial wastewater, if the numerical value of COD (COD) is less than 100mg/L, then dried using 100-200 DEG C, if it is detected that the numerical value of COD (COD) is greater than 100mg/L, then dried using 400-600 DEG C, sludge is made the moisture evaporation inside sludge by the heating of drying unit, its sludge is just dry and is in bulk, and block-like sludge can be installed on by spray profit and spray a small amount of organic polymer aqueous solution on surface, moisture content in its organic polymer aqueous solution is just evaporated by the exhaust-heat heating of sludge, keep organic polymer dry and is attached on the surface of sludge, i.e. recycling grinder will dry Later sludge is ground into the spare of tiny shape, and adds soluble coagulant and give physics mode and mixed, and to remake out biological agent, the biological agent produced can reach absorption water for devoting again in industrial wastewater
Middle heavy metal ion and the purpose of tool sedimentation.
The present invention is following to have the advantages that:
(1) when throwing has the industrial wastewater of biological agent by electrolysis, dehydration, drying, spray organic polymer, after the step of grinding and addition solubility coagulant, the sludge part without heavy metal in original industrial wastewater can be remake into biological agent, it is recycled for being put into industrial wastewater again, heavy metal sewage sludge in its industrial wastewater can complete recycling and reusing, it can reach the effect that no waste generates, and it can not only reduce the manufacturing cost of biological agent, also it is not required to discharge sludge with being carried to discharge by the vehicles, to reduce transportation cost, and then reach the whole production cost of reduction, the purpose of harm reduction environmental risk.
(2) biological agent is with the function for absorbing heavy metal ions in water, the heavy metal ion for being adsorbed in biological agent is deposited on the cathode carrier of electrolysis device by redox reaction caused by electrolysis device again, the content of heavy metal ion in its industrial wastewater will be greatly reduced, to reach the codes and standards for meeting discharge, the target for reducing environmental pollution.
(3) via sludge generated after filtration step, it can't a large amount of adsorption moistures because of the silicon-based inorganic material in biological agent, and biological agent silicon-based inorganic material largely to be made of, so when the sludge made of accumulating after being processed as filter device carries out drying operation, the time of drying can be reduced, by the lower biological agent of moisture content to achieve the effect that reduce electric power spent by drying unit.
It is please referred to shown in Fig. 2 and Fig. 3 again, for the step flow chart (one) of another embodiment of the present invention and (two), it can be clearly seen from the figure that the present invention is that can first carry out following water purification step before preferable implementation steps (100) to (105):
(1001) content of beary metal of industrial wastewater is detected in industrial wastewater using Analysis of Heavy Metal method.
(1002) the general flocculants such as powdered, graininess, block heavy stone used as an anchor shape or liquid are put into industrial wastewater, for particle in absorption water and form glue plumage generation deposited phenomenon.
(1003) biological agents such as powdered, graininess or block heavy stone used as an anchor shape are put into again, to adsorb metal ion in industrial wastewater, so that industrial wastewater generates coagulation sedimentation phenomenon and generates sludge and aqueous solution, and the outer aqueous solution of sludge will meet the standard value of environmental emission, can continue to execute step (100) to (105).
General flocculant in above-mentioned steps (1002) is preferably implemented as polymer alumina (PAC), but in practical application, also the intermixture of polyacrylamide (PAM) can be added for polymer alumina or polymer alumina adds aluminium chloride ferrum (PAC；Poly Aluminum Ferric chloride) etc. mix with polymer alumina for adsorbing particle in water and generate the preparation of coagulation sedimentation phenomenon；And the glue plumage is plus flocculant Yu Shuizhong is formed by small gelling via materialization effect or cohesion and can sedimental substance.
Another embodiment of the present invention is thrown in industrial wastewater flocculant, and flocculant can be further by Industry Waste
Particle (such as sand, sandstone, metal particle, vegetable material, debris) in water forms glue plumage and generates deposited phenomenon, that is, can reach the effect for further decreasing the residual of the heavy metal ion in industrial wastewater, suspended solid (SS) and COD (COD).
Be with, the foregoing is merely illustrative of the preferred embodiments of the present invention, the scope of the patents non-therefore that limitation is of the invention, present invention is generally directed to be first with Analysis of Heavy Metal and to have thrown and had the industrial wastewater of biological agent, its heavy metal sewage sludge can pass through electrolysis, dehydration, drying, spray organic polymer, the step of grinding and addition solubility coagulant, recycles the sludge circulation inside industrial wastewater, the sludge is remake into biological agent, can reach makes Industrial Wastewater Treatment without the effect for generating waste, therefore it may achieve the structure of foregoing advantages such as, device should all be covered by the present invention, such simple modification and equivalent structure variation, should all similarly it be included in the scope of the patents of the invention, Chen Ming is given in conjunction.
Claims (10)
- A kind of recovery method of heavy metal sewage sludge, heavy metal and sludge for industrial wastewater are recycled operation, industrial wastewater is detected first with Analysis of Heavy Metal method, biological agent is put into the industrial wastewater after detection to adsorb the heavy metal ion in industrial wastewater, and it generates coagulation sedimentation phenomenon and generates sludge and meet the aqueous solution of discharge standard, and the aqueous solution except the sludge just recycles use because meeting discharge standard value, and sludge part is then handled according to the following steps implementation:(100) it puts into and installs electrolysis device in the processed industrial wastewater of biological agent, and be powered between two electrode holders, for the heavy metal ion being adsorbed on sludge and by electro-deposition in collection recycling on electrode；(101) sludge that industrial wastewater and precipitating generate is subjected to dewatering operation to sludge using filter device again, will be discharged in waste water solution and sludge containing attached moisture content, only leaves the sludge that water content is default value；(102) drying operation just is carried out with default temperature to the sludge that water content is default value using drying unit after, even if remaining moisture content and organic component are heated at high temperature and are evaporated in sludge, so that drying sludge is in bulk；(103) spray profit is reused to be installed on the organic polymer aqueous solution for spraying effective biotic component content in the residual block-like Sludge Surface of warm degree for default value, moisture content in its organic polymer aqueous solution is evaporated because of the residual temperature by block-like sludge remaining, so that the organic polymer in organic polymer aqueous solution is attached in block-like Sludge Surface；(104) grinding operation is carried out by grinder for the block-like sludge of attachment organic polymer, block-like sludge is ground into the spare of tiny shape；(105) finally the spare of tiny shape is mixed with soluble coagulant, to produce for the biological agent in investment industrial wastewater.
- The recovery method of heavy metal sewage sludge as described in claim 1, it is in color method and electrochemical methods that wherein industrial wastewater detection Analysis of Heavy Metal method, which is optics,；And the biological agent that the industrial wastewater uses is blended by the soluble coagulant by silicon-based inorganic material, organic polymer and tool aluminium system or iron series composition；And the silicon-based inorganic material about occupies 40-60%, organic polymer and about occupies 10-20%, tool aluminium system or the coagulant of iron series composition and about occupies 30-40%.
- The recovery method of heavy metal sewage sludge as claimed in claim 2, wherein the silicon-based inorganic material of the biological agent is the inorganic materials such as silica, kaolin, diatomite, montmorillonite, vermiculite or zeolite；And the organic polymer is the organic polymers such as poly- Vetsin, chitosan, polyacrylic acid or kayexalate；And the solubility that the coagulant of the tool aluminium system or iron series composition is aluminum sulfate, aluminium polychloride, frerrous chloride or ferrous sulfate is mixed Solidifying agent.
- The recovery method of heavy metal sewage sludge as described in claim 1, the voltage that wherein the electrolysis device in the step (100) is powered are between 0.1-20 volts, and electric current is between 0.1-10 amperes；And the anode carrier and cathode carrier are at least one layer of platinum plating titanium net, gold-plated titanium net or plate web material or stainless steel web material made by palladium titanium net.
- The recovery method of heavy metal sewage sludge as claimed in claim 4, wherein the electrolysis device is the active carbon cloth or conductive carbon cloth for being further equipped with blender in industrial wastewater, and being pasted with tool electric conductivity on positive carrier and cathode carrier respectively.
- The recovery method of heavy metal sewage sludge as described in claim 1, wherein via the processed sludge of filter device in the step (101), its water content default value is about 50-80%, and it includes silicon-based inorganic material, organic polymer and other materials (oil content, toluene) that sludge composition, which is, wherein silicon-based inorganic material about occupies 60-70%, organic polymer 30-20%, other materials 10%.
- Heavy metal sewage sludge recovery method as described in claim 1, wherein the default temperature in the step (102) is 100-600 DEG C, if sludge is free of organic matter, then default temperature is dried using 100-200 DEG C, but if sludge contains organic matter, and default temperature is dried using 400-600 DEG C.
- The recovery method of heavy metal sewage sludge as described in claim 1, the wherein biotic component content default value about 1-10% of the organic polymer in the step (103), and the organic polymer mixed liquor is the mixed solution of the organic polymers such as poly- Vetsin, chitosan, polyacrylic acid or kayexalate；And the spare of tiny shape is powdered or granular spare in the step (104)；And soluble coagulant is the powdered or graininess coagulant of aluminum sulfate, aluminium polychloride, frerrous chloride or ferrous sulfate in the step (105), its main ingredient is identical as the composition in biological agent, generates biological agent for being mixed in the spare of tiny shape using physics mode.
- Heavy metal-polluted mud recovery method as described in claim 1, wherein the installing electrolysis device of the step (100) to (105) and before giving energization first carry out the following steps:(1001) content of beary metal of industrial wastewater is detected in industrial wastewater using Analysis of Heavy Metal method；(1002) general flocculant is put into, in industrial wastewater to adsorb particle in water；(1003) biological agent is put into again, to adsorb metal ion in industrial wastewater, so that industrial wastewater generates coagulation sedimentation phenomenon and generates sludge and aqueous solution, and the outer aqueous solution of sludge will meet the standard value of environmental emission, be further continued for executing step (100) to (105).
- Heavy metal sewage sludge recovery method as claimed in claim 9, wherein the general flocculant in the step (1002) is polymer alumina, polymer alumina and polyacrylamide intermixture or polymer alumina and aluminium chloride Iron etc. is mixed with polymer alumina to adsorb particle in water and generate the preparation of coagulation sedimentation phenomenon.
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| PCT/CN2016/000477 WO2018035626A1 (en) | 2016-08-23 | 2016-08-23 | Recovery method for heavy metal sludge |
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| CN112299507A (en) * | 2020-10-12 | 2021-02-02 | 联合环境水处理(大丰)有限公司 | Industrial wastewater standard discharge detection method |
| CN113307325A (en) * | 2021-06-17 | 2021-08-27 | 唐山市蓝翔环保设备有限公司 | Harmless agent for sewage treatment and preparation method thereof |
| CN113880158A (en) * | 2021-10-26 | 2022-01-04 | 广州市芦苇环保科技有限责任公司 | Polyacrylamide water purifying agent and production method thereof |
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