CN1594131A - Method for treating wastewater containing heavy metal and radioactive metal ions by biological method - Google Patents
Method for treating wastewater containing heavy metal and radioactive metal ions by biological method Download PDFInfo
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- CN1594131A CN1594131A CN 200410020879 CN200410020879A CN1594131A CN 1594131 A CN1594131 A CN 1594131A CN 200410020879 CN200410020879 CN 200410020879 CN 200410020879 A CN200410020879 A CN 200410020879A CN 1594131 A CN1594131 A CN 1594131A
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Abstract
Disclosed is a method for treating wastewater containing heavy metal and radioactive metal ions by biological method, wherein WK adsorption material, a composite biological adsorption agent produced through filtering brewers' yeast using environmental mineral materials is employed, the material comprises the dried constituents of brewer's yeast 0-99%, environment mineral material 99-0%, addition agent 1%, moisture 20-25%, the waste water treatment method consists of drying at 50-80 deg. C for 2-3h, obtaining dried blocks with moisture <=9%, dry pressing to obtain 1-8mm particles, loading the WK adsorption material particles into absorber so as to obtain an adsorption treatment column, which consists of a working group and a adsorbent replacement group.
Description
Technical field
The invention belongs to utilize microorganism is the biological wastewater treatment technology of feature, specially refers to a kind of biochemical process and handles the method that contains heavy metal and radioactive metal ion waste water.
Background technology
The trade effluent that contains heavy metal ion is mainly derived from plating, mining, ore dressing, Metal smelting, battery, special glass and Chemical Manufacture etc.The World Health Organization points out that with regard to the promulgation bulletin heavy metal is not only poisonous as far back as nineteen sixty-eight, and carcinogenesis is arranged, and can make the children that growing cause deformity.The heavy metal wastewater thereby of discharging enters the nature water body if exceed standard, and understands polluted-water or soil, and heavy metal passes through the absorption and the enrichment of animal and plant, just can transfer to by diet to cause chronic poisoning in the human body again.Hg, Pb, Ni, Cr, Cd, Ag are the first kind pollutent of GB regulation in the heavy metal, can produce the long-range pollutent that has a strong impact on to HUMAN HEALTH at environment or animal and plant body accumulation; And Cu, Zn, Mn are second pollutant, and its long-range influence is littler than first kind pollution substance, and more should draw for what pay attention to is that the waste water that has also contains UO
2 2+, Th
4+Radioactive metal ion, environmental pollution is even more serious.
Protect environment, administer the waste water that contains heavy metal and radioactive metal ion, the conservation of nature environment water is that modern industry is produced necessary.Traditional method has chemical method, ion-exchange-resin process, electrolytic process, membrane separation process, evaporation concentration method, absorption method etc., these methods are effective to some metal ions, but exist initial cost height, processing costs big, need problem that secondary pollutant is handled, in order to develop the wastewater processing technology of environment-friendly type, efficient, non-secondary pollution, people turn to research emphasis the biochemical processing of heavy metal and radioactive metal gradually.The real rise of biochemical treatment heavy metal and radioactive metal ion research is still in the eighties in 20th century, the biochemical treatment heavy metal of having succeeded in developing at present and the technology of radioactive metal ion waste water mainly are to cultivate the bacterium that can adsorb heavy metal and radioactive metal, and heavy metal and radioactive metal are adsorbed onto in bacterial body surface or the body.Enter practical application maximum be iron oxygen bacterium, iron oxygen bacterium is be grown in good gas chemoautotrophy type bacterium in the acidic bodies of water a kind of, thereby its maximum characteristics are can utilize in sour water oxidation of divalent iron ion is fixed growth for the energy that trivalent obtains with airborne carbonic acid gas.Iron oxygen bacterium is a kind of good tart bacterium but the halogen ion can hinder its growth.Therefore, the water quality of waste water must be the sulphur tart, in addition, 10～35 ℃ of the pH value of waste water need 1.3～4.5, water temperatures, the starting point concentration of contained heavy metal ion and the load change of the water yield all have bigger influence to the oxidation activity of iron oxygen bacterium.The condition of restriction is more, hinder its ground to use, and key issue is the cost of preventing and remedying pollution; Especially the most of scopes of the enterprise of China are less, and production level is low, thirst for development and use Prevention Technique with low cost especially.This also is the place of properly settling the contradiction of environmental protection and production, environment and development.
Summary of the invention
Administer the deficiency of technology at heavy metal and radioactive metal ion in the above waste water, the present invention proposes a kind of biochemical process and handle the method that contains heavy metal and radioactive metal ion waste water, this biochemical processing method is exactly to utilize the matrix material of microorganism and environmental mineral to be called for short the WK sorbing material, to the adsorption technology of aqueous phase heavy metal and radioactive metal ion.
1, principle
The heavy metal and the radioactive metal ion that utilize the organic groups such as peptidoglycan, the carboxyl on the lipid, hydroxyl on microorganism cells surface to catch the aqueous phase solubility as ' pouncing on hand ' make it to form nontoxic organic coordination compound or inner complex, thereby remove the deleterious heavy metal and the radioactive metal ion of aqueous phase.Discover that many microbial adsorbents can both combine with heavy metal and radioactive metal ion, but have only strong with the metal ion binding ability, selectivity good, with low cost and microbial adsorbent that obtain easily just can be used for actual biological adsorption treatment.The condition of biological adsorption applications is to filter out the biological species that has development prospect most in the biomaterial.Discarded cereuisiae fermentum is the by product in brewage workshop, has every year the discarded yeast of hundreds of thousands of ton to produce.Wherein 2/3 is the Primary Fermentation yeast, and this part yeast quality is better, and impurity is few, is used on a small quantity reclaiming as bacterial classification continuing to use; All the other 1/3 are discarded yeast, and coprecipitations such as yeast, precipitating proteins poor as useless hops with other small amount of impurities are generally thrown aside at the bottom of wine storage jar in storage wine process, and direct discharging can pollute.If will discard cereuisiae fermentum as microbial adsorbent, not only waste resource can be utilized once more, also reduced the cost of cultivation, separation of bacterial.
The microorganism of live body or dead volume put in the waste water that contains heavy metal and radioactive metal ion adsorb, use solid-liquid separation technique then, the microorganism of having adsorbed heavy metal and radioactive metal ion is separated with water body, reach the purpose of purifying liquid waste.Therefore the microbial adsorbent of industrial application, except to possess selectivity to heavy metal and radioactive metal, with the binding ability of heavy metal and radioactive metal, performance such as cheap and easy to get, should consider that also absorption finishes artifact sorbent material water body separation problem.
It is to have porous silicite that environment mineral material has wilkinite, diatomite, zeolite, medical stone.Micropore multistage, a large amount of, ordered arrangement is arranged, can the little particle of filtering to 0.1～1.0 μ m.Utilize its surface adsorption effect such as surface chemistry composition, surperficial micromorphology, surface to become key absorption, surface electrical behavior adsorption, utilizing its duct filteration is natural self-purifications such as duct molecular sieve, ion sieve effect, therefore the environment mineral material function that has flocculation, absorption, degerming, decolour and go to distinguish the flavor of, can utilize original ore powder and through purification or surface modification treatment after breeze, with the diatomite in powder after diatomite original ore powder and purification or the surface modification treatment for well.At last procedure of beer production is the contaminant filters such as discarded yeast, discarded hops and precipitating proteins that suspend in to beer.At present the filtering technique that adopts of some enterprises is to utilize environment mineral material such as diatomite to make filtrate, and microorganism is adsorbed on the environment mineral material, just can easier separate with water body.
Discarded cereuisiae fermentum can be compounded to form the mixture of microorganism with environment mineral material, makes microbial adsorbent with it, has had two kinds of characteristics of environment mineral material absorption and microorganism absorption concurrently.
Microorganism to the adsorption test result of aqueous phase heavy metal and radioactive metal ion as can be seen, microorganism adsorption phenomena and synthetic ion exchange resin are very similar to the absorption of heavy metal.Therefore the present invention also is prepared into bacterium particulate WK sorbing material to microbial adsorbent with reference to ion exchange resin column, is filled in the biological adsorption column, adopts the technology of dynamic adsorption.
2, the present invention is divided into WK sorbing material drying, and the preparation of biological adsorption column is to three steps of biochemical treatment that contain heavy metal and radioactive metal ion waste water.
(1) to the drying of WK sorbing material
The composition of WK sorbing material dry basis is: cereuisiae fermentum 0～99%, environment mineral material 99～0%, additive 1% (concrete composition changes according to heavy metal content in the water).Cereuisiae fermentum is a ferment yeast behind the depleted, and its main component is protein 30～40%, carbohydrate 20～25%, fat 1.5%, ash content 7%, robust fibre 1.5%, also has trace element: phosphorus 12.90mg/g, potassium 20mg/g, calcium 0.8mg/g.Moisture in the undried WK sorbing material is 20～25%.WK sorbing material drying can adopt dried yeast powder to prepare the cylinder drying that often uses in the industry.With two steam heating cylinders, be 0.5～1.0mm at a distance of the gap, and rotate round about that Heating temperature is 50～80 ℃, be 2～3h heat-up time, and the WK sorbing material is through the cylinder gap heat drying, and it moisturely is no more than 9% dried dried piece.Need to handle if in waste water, contain the ion of uranium, thorium radioactive metal, can prepare the WK sorbing material with discarded cereuisiae fermentum and additive.Additive can be ground silica, clay, lime carbonate, acetate triglycol, derivatived cellulose, high-polymerization degree polysaccharide.
(2) preparation of biological adsorption column
The dry-pressing of dried WK sorbing material is become the particle of 1mm～8mm, forming pressure 〉=1.6～2.0MPa/ grain, its ultimate compression strength 〉=0.6MPa/ grain is soaked grain compressive strength 〉=0.3MPa/ grain after 5 days in water, and tap density is 0.4～0.6g/cm
3, surface-area 〉=1200m
2/ g, the WK absorbing material granules of every 1kg can be handled and contain various heavy and radioactive metal ion, and wherein the content of each heavy metal and radioactive metal ion is waste water 0.2～0.9t of 100～1000mg/L.
(3) to the biochemical treatment of heavy metal ion-containing waste water
The present invention adopts dynamic adsorption technology, and absorbing process as shown in drawings.By the one-level adsorption treatment post 1 of working group, working group's secondary absorption is handled post 2, changes the one-level adsorption treatment post 3 of sorbent material group, and change the secondary absorption of sorbent material group and handle post 4, flooding velocity meter 5, water pump 6, water pump 7 is formed.
If to contain Hg, Pb, Ni, Ag, Cd, Cu, Zn, U, Th waste water adopts discarded cereuisiae fermentum secondary absorption, or multistage absorption can make effluent quality reach emission standard fully.Handle post and be divided into two groups, working group and change the sorbent material group, each group is the two poles of the earth of serial connection or multiple-stage treatment post more, looks heavy metal and radioactive metal ion starting point concentration can divide two utmost points to handle or multipole processing in the waste water; Handle the automatic conversion of post for two groups and do not carry out dynamic adsorption wastewater treatment operation with stopping; Technical qualification to the waste water adsorption treatment are:
A, each processing post adsorption time 10～30min
B, the initial pH value of solution: 3.5～8
C, adsorption temp: 10～30 ℃
D, initial heavy metal and radioactive metal ion concentration :≤1000mg/L
The flow velocity of the water in e, the processing post: 0.2～0.5m/s
The trade effluent that enters native system should be through having removed the primary treatment waste water behind the solid pollutant.
Can design the diameter of the processing post of plurality of specifications, highly according to the technical qualification of adsorption treatment and the accessible wastewater flow rate of WK absorbing material granules.The scope of handling wastewater flow rate can per hour restrain hundreds of tons from per hour thousands of.As highly being 2～4m when flow rate of water flow 0.2～0.5m/s, Ф 0.6m can handle waste water 200t/h, handling the judgement that post absorption lost efficacy is to have handled every heavy metal species and radioactive metal ion 1000mg/L waste water 0.9t according to every kg sorbent material of packing in the adsorption treatment post, and handles in the draining of back that any ionic content has all reached Hg in each heavy metal species and radioactive metal ion
2+0.05mg/L, Pb
2+0.6mg/L, Cu
2+0.5mg/L, Zn
2+1.0mg/L, Ni
2+1.0mg/L, Cd
2+0.1mg/L, Ag
+0.05mg/L, UO
2 2+0.05mg/L, Th
4+0.01mg/L in time, is judged to be sorbent material and lost efficacy and need change.
3, the present invention handles and to contain heavy metal and radioactive metal waste water can reach following effect:
The WK sorbing material is respectively Hg 168.20mg/g, Pb 123.40mg/g, Ag112.90mg/g, Cd 104.50mg/g, Ni93.10mg/g, Cu82.58mg/g, Zn 80.56mg/g, Mn 73.40mg/g to the absorption charge capacity of heavy metal ion, and this sorbent material also can be used to adsorb the UO in the radioactive wastewater
2 2+And Th
4+, etc. radioactive substance, then be Th220mg/g, U180mg/g to the absorption charge capacity of radioactive substance.
Because the multiple adsorption of WK composite adsorbing material also makes colourity in the waste water, organic concentration descend, and makes the biochemical oxygen demand (BOD) BOD of water body
5Up to standard; And aerobic substance content descends in the waste water, makes the chemical oxygen demand COD of water body
CrUp to standard.
| Water inlet | Water outlet | National standard | |
| ?COD cr(mg/L) | ????300-500 | ????＜18 | ????100 |
| ?BOD 5??(mg/L) | ????100-200 | ????＜12 | ????30 |
| Colourity | ????80-100 | ????＜5 | ????50 |
| ?Hg????(mg/L) | ????200-500 | ????＜0.05 | ????0.05 |
| ?Pb????(mg/L) | ????200-500 | ????＜0.5 | ????1.0 |
| ?Cu????(mg/L) | ????128-200 | ????＜0.5 | ????2.0 |
| ?Zn????(mg/L) | ????130-250 | ????＜1.0 | ????5.0 |
| ?Ni????(mg/L) | ????126-300 | ????＜1.0 | ????1.0 |
| Cd(mg/L) | ????100-500 | ????＜0.1 | ????0.1 |
| Ag??(mg/L) | ????100-400 | ????＜0.05 | ????0.05 |
| Colibacillus (individual/1) | ????6×10 5-10×10 5 | ????＜50 |
Uranium ion in the waste water can be handled UO
2 2+≤ 0.05mg/L, thorium ion is handled Th
4+The degree of≤0.01mg/L.Biological absorption of the present invention has the following advantages as the technology that heavy metal and radioactive metal ion in the improvement waste water pollute:
(1) under lower concentration, can optionally remove certain or various heavy and radioactive metal ion;
(2) processing efficiency height does not cause secondary pollution;
(3) pH value and temperature range are wide;
(4) be easy to Separation and Recovery heavy metal or processing poisonous metal.
Description of drawings
Fig. 1 is the The two-stage dynamic adsorption treatment process synoptic diagram of WK composite adsorbing material to heavy metal and radioactive metal ion waste water
Embodiment
1, make the discarded cereuisiae fermentum of media filtration with the environment mineral material diatomite in powder after, making compound adsorbent is the WK composite adsorbing material
(1) uses the Changbai diatomite in powder
A, Changbai diatomite chemical ingredients
| Chemical constitution | ??SiO 2 | ??Al 2O 3 | ?Fe 2O 3 | ?CaO | ?MgO | Other |
| Percentage composition (%) | ??91.66 | ??1.87 | ?0.86 | ?0.18 | ?0.054 | 5.376 |
B, Changbai diatomite size-grade distribution
| Granularity (μ m) | ??～10 | ??10～20 | ??20～30 | ??30～40 | ??40～50 | ??50～60 | ??60～80 | ??80～100 | ??100～ |
| Mass accumulation per-cent (%) | ??11.3 | ??36.4 | ??55.9 | ??72.1 | ??84.9 | ??92.5 | ??98.1 | ??99.5 | ??100 |
| Regional quality per-cent (%) | ??11.3 | ??25.1 | ??19.5 | ??16.2 | ??12.8 | ??7.6 | ??5.6 | ??1.4 | ??0.05 |
Diatomaceous testing graininess scope 0～100 μ m in Changbai, from size distribution curve as can be seen, the granularity of the overwhelming majority is between 10～50 μ m, and middle granularity is 26.71 μ m, porosity 85%.
(2) beer yeast slurry:
Discarded cereuisiae fermentum is the by product-back ferment yeast in brewage workshop, its main component is protein 32.1%, carbohydrate 21.0%, fat 1.2%, ash content 10.4%, robust fibre 2.4%, also has trace element: phosphorus 12.90mg/g, potassium 20mg/g, calcium 0.8mg/g etc., and all the other are moisture; With diatomite is filtering material, and derivatived cellulose is an additive.Filtering afterwards to discarded cereuisiae fermentum, filter mud is that WK composite adsorbing material content is: dry beer yeast: 62.4%, and diatomite in powder: 15.6%, additive: 0.6%, moisture content: 21.4%.
Drying conditions: 80 ℃, time: 2h makes dried piece.
(3) particle of preparation WK composite adsorbing material
Discarded cereuisiae fermentum in the dried piece of dried WK composite adsorbing material: 79.2%, diatomite 19.8%, moisture＜6%, tap density 0.5g/cm
3, be the particle that 1mm is made in dry-pressing under the 1.6MPa at pressure, single particle ultimate compression strength 0.6MPa/ grain soaks in water that grain compressive strength is the 0.3MPa/ grain after 5 days, and surface-area can reach 1265m
2/ g.The diameter Ф 0.6m that packs into, in the processing post of height 1.2m, by arranging shown in the accompanying drawing that handling post is divided into two groups, working group and change the sorbent material group, according to the starting point concentration of the heavy metal ion of waste water to be processed for dividing secondary absorption.
(4) wastewater treatment
The starting point concentration Hg of water inlet heavy metal ion
2+200mg/L, Pb
2+207mg/L, Cu
2+128mg/L, Zn
2+130mg/L, Ni
2+138mg/L, Cd
2+146mg/L, Ag
+199mg/L.The adsorption technology condition is the adsorption time 〉=10min of single adsorption treatment post, initial pH value 6.5,16 ℃ of adsorption temps, water outlet heavy metal ion and COD after the secondary absorption
Cr, BOD
5Content be Hg
2+: 0.05mg/L, Pb
2+: 0.3mg/L, Cu
2+: 0.2mg/L, Zn
2+: 0.8mg/L, Ni
2+: 0.7mg/L, Ag
+: 0.1mg/L, Cd
2+: 0.2mg/L, COD
Cr: .14mg/L, BOD
5: 8mg/L, handle the water yield and reach 70t/h.
2, directly make the WK composite adsorbing material with discarded cereuisiae fermentum
The composition of discarded cereuisiae fermentum such as preceding, through 80 ℃, the ground silica that the dry back of 3h adds gross weight 1% is an additive, at pressure is that the 1mm particle is made in dry-pressing under the 1.6MPa, single particle ultimate compression strength 0.6MPa/ grain, soak grain compressive strength 〉=0.3MPa/ grain after 5 days in water, surface-area can reach 1128m
2/ g.Tap density 0.44g/cm
3, the diameter Ф 0.6m that packs in the processing post of height 1.2m, arranges by shown in the accompanying drawing, divides secondary absorption, water inlet heavy metal ion starting point concentration Hg
2+200mg/L, Pb
2+207mg/L, Cu
2+128mg/L, Zn
2+130mg/L, Ni
2+138mg/L, Cd
2+147mg/L, Ag
+198mg/L, UO
2 2+75mg/L, Th
4+60mg/L.The adsorption technology condition is single adsorption treatment post adsorption time 〉=10min, water inlet initial pH value 6.5,16 ℃ of adsorption temps, the water outlet heavy metal after the secondary absorption and radioactive metal ion and COD
Cr, BOD
5Content be Hg
2+: 0.04mg/L, Pb
2+: 0.3mg/L, Cu
2+: 0.3mg/L, Zn
2+: 0.9mg/L, Ni
2+: 0.6mg/L, Cd
2+: 0.7mg/L, Ag
+: 0.4mg/L, UO
2 2+0.05mg/L, Th
4+0.01mg/L, COD
Cr: 17mg/L, BOD
5: 10mg/L, handle the water yield and reach 70t/g.
Claims (4)
1, a kind of biochemical process is handled the method that contains heavy metal and radioactive metal ion waste water, it is characterized in that the biological adsorption agent that uses depleted cereuisiae fermentum and environment mineral material to be composited, abbreviation WK sorbing material; Step and each step technique condition that processing contains heavy metal and radioactive metal ion method for waste water are:
(1) makes the media filtration cereuisiae fermentum with environment mineral material, generate the WK composite adsorbing material, WK composite adsorbing material drying; The composition of this WK sorbing material dry basis is: cereuisiae fermentum: 0～99%, environment mineral material: 99～0%, additive: 1%, undried WK sorbing material moisture 20～25%, at 50～80 ℃ of following constant pressure and dry 2～3h, make the dried piece of biological adsorption agent of moisture≤9%;
(2) the dried piece of dried WK sorbing material is pressed into particle about 1～8mm, forming pressure is 〉=1.6～2.0MPa, the grain compressive strength after making 〉=0.6MPa/ grain, tap density 0.4～0.6g/cm
3, surface-area 〉=1200m
2/ g, in water, soak grain compressive strength 〉=0.3MPa/ grain after 5 days, the WK absorbing material granules of every 1kg can be handled and contain various heavy and radioactive metal ion, is that the waste water of 100～1000mg/L can be handled 0.2～0.9t to the content of each heavy metal and radioactive metal ion;
(3) handle containing heavy metal and radioactive metal ion wastewater biochemical, the WK absorbing material granules that is composited is packed in the wastewater treatment adsorber, made the adsorption treatment post; Handle post and be divided into two groups, working group and change the sorbent material group, each group is the two poles of the earth of serial connection or multiple-stage treatment post more, looks heavy metal and radioactive metal ion starting point concentration can divide two utmost points to handle or multipole processing in the waste water; Handle the automatic conversion of post for two groups and do not carry out dynamic adsorption wastewater treatment operation with stopping; Technical qualification to the waste water adsorption treatment are: each adsorption treatment post adsorption time 10～30min, waste water solution initial pH value: 3.5～8, adsorption temp 10-30 ℃, initial heavy metal and radioactive metal ion concentration≤1000mg/L, the water flow velocity 0.2～0.5m/s in handling post.
2, a kind of biochemical process according to claim 1 is handled the method that contains heavy metal and radioactive metal ion waste water, used is characterised in that with cereuisiae fermentum compound environment mineral material, can be diatomite, zeolite, medical stone, the bentonite origin breeze, or with these materials through purify or surface modification treatment after powder, with the powder after diatomite original ore powder and purification or the surface modification treatment for well.
3, a kind of biochemical process according to claim 1 is handled the method that contains heavy metal and radioactive metal ion waste water, and the feature of used additive is to be ground silica, clay, lime carbonate, acetate triglycol, derivatived cellulose, high-polymerization degree polysaccharide.
4, a kind of biochemical process according to claim 1 is handled the method that contains heavy metal and radioactive metal ion waste water, the use characteristic of its adsorption treatment post is, handled every heavy metal species and radioactive metal ion 1000mg/L waste water 0.9t according to every kg sorbent material of packing in the adsorption treatment post, and handled in the draining of back that any ionic content has all reached Hg in each heavy metal species and radioactive metal ion
2+0.05mg/L, Pb
2+0.6mg/L, Cu
2+0.5mg/L, Zn
2+1.0mg/L, Ni
2+1.0mg/L, Cd
2+0.1mg/L, Ag
+0.05mg/L, UO
2 2+0.05 mg/L, Th
4+0.01mg/L in time, is judged to be sorbent material and lost efficacy and need change.
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|---|---|---|---|
| CNB2004100208792A CN1292993C (en) | 2004-07-02 | 2004-07-02 | Method for treating wastewater containing heavy metal and radioactive metal ions by biological method |
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| CNB2004100208792A CN1292993C (en) | 2004-07-02 | 2004-07-02 | Method for treating wastewater containing heavy metal and radioactive metal ions by biological method |
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| CN1594131A true CN1594131A (en) | 2005-03-16 |
| CN1292993C CN1292993C (en) | 2007-01-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894597A (en) * | 2010-06-04 | 2010-11-24 | 清华大学 | Pretreatment method for radioactive wastewater |
| CN102360659A (en) * | 2011-06-24 | 2012-02-22 | 中国科学院宁波材料技术与工程研究所 | Magnetic submicron composite core-shell particles, and preparation method and application thereof |
| CN103979749A (en) * | 2014-06-06 | 2014-08-13 | 福州大学 | Treatment device and method for removing heavy metals out of sewage |
| CN104944710A (en) * | 2015-06-29 | 2015-09-30 | 安徽省安庆市皖清环保科技有限公司 | Medical wastewater three-stage treatment technique |
| CN106006998A (en) * | 2016-06-16 | 2016-10-12 | 江苏麦阁吸附剂有限公司 | Attapulgite/denitrifier composite type wastewater treating agent and preparation method thereof |
| CN110204130A (en) * | 2019-07-10 | 2019-09-06 | 南京蓝胜环保科技有限公司 | A kind of wastewater treatment equipment and method containing heavy metal and radioactive uranium element |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6227098A (en) * | 1985-07-29 | 1987-02-05 | Toyo Yakushiyoku Kogyo Kk | Treatment of waste water |
| CN2094550U (en) * | 1991-03-21 | 1992-01-29 | 冯宽利 | Industrial sewage processing machine |
| JP3071364B2 (en) * | 1994-07-18 | 2000-07-31 | ハイモ株式会社 | Method for producing hydrogel, heavy metal ion adsorbent, dye adsorbent, microorganism carrier and enzyme immobilizing carrier |
| US6383388B1 (en) * | 1995-08-08 | 2002-05-07 | The Regents Of The University Of California | Water treatment process and system for metals removal using Saccharomyces cerevisiae |
| CN2402138Y (en) * | 2000-01-27 | 2000-10-25 | 朱浩 | Biochemical reactor |
-
2004
- 2004-07-02 CN CNB2004100208792A patent/CN1292993C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894597A (en) * | 2010-06-04 | 2010-11-24 | 清华大学 | Pretreatment method for radioactive wastewater |
| CN102360659A (en) * | 2011-06-24 | 2012-02-22 | 中国科学院宁波材料技术与工程研究所 | Magnetic submicron composite core-shell particles, and preparation method and application thereof |
| CN103979749A (en) * | 2014-06-06 | 2014-08-13 | 福州大学 | Treatment device and method for removing heavy metals out of sewage |
| CN104944710A (en) * | 2015-06-29 | 2015-09-30 | 安徽省安庆市皖清环保科技有限公司 | Medical wastewater three-stage treatment technique |
| CN106006998A (en) * | 2016-06-16 | 2016-10-12 | 江苏麦阁吸附剂有限公司 | Attapulgite/denitrifier composite type wastewater treating agent and preparation method thereof |
| CN110204130A (en) * | 2019-07-10 | 2019-09-06 | 南京蓝胜环保科技有限公司 | A kind of wastewater treatment equipment and method containing heavy metal and radioactive uranium element |
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| Publication number | Publication date |
|---|---|
| CN1292993C (en) | 2007-01-03 |
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