CN105668839A - Technology for treating heavy metal waste water through macroalgae - Google Patents
Technology for treating heavy metal waste water through macroalgae Download PDFInfo
- Publication number
- CN105668839A CN105668839A CN201610224526.7A CN201610224526A CN105668839A CN 105668839 A CN105668839 A CN 105668839A CN 201610224526 A CN201610224526 A CN 201610224526A CN 105668839 A CN105668839 A CN 105668839A
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- Prior art keywords
- kelp
- heavy metal
- active
- macroalgae
- solution
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Classifications
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a technology for treating heavy metal waste water through macroalgae.The technology includes the following procedures that firstly, waste water pretreatment is conducted; secondly, treatment is conducted through a non-active macroalgae filtering pond; thirdly, treatment is conducted through a non-active macroalgae adsorption pond; fourthly, remaining heavy metal ions are removed through a reverse osmosis membrane assembly; fifthly, water meeting standards is discharged.The technology for treating the heavy metal waste water is simple, cost is low, the non-active macroalgae filtering pond and the non-active macroalgae adsorption pond are arranged before the reverse osmosis technology, heavy metal ions, organic pollutants and inorganic pollutants in sewage can be effectively removed, pollution loads of the reverse osmosis membrane assembly are reduced, replacement frequency of the membrane assembly is reduced, corrosion resistance is greatly improved, the membrane assembly can be replaced regularly, and secondary pollution cannot be caused.
Description
Technical field
The invention belongs to technical field of sewage, in particular to a kind of technique utilizing kelp process heavy metal wastewater thereby.
Background technology
Heavy metal wastewater thereby refers to the waste water containing heavy metal discharged in the Industrial processes such as mining and metallurgy, machinofacture, chemical industry, electronics, instrument. Heavy metal (as containing cadmium, nickel, mercury, zinc etc.) waste water is that an environmental pollution is the most serious and the mankind endangers one of maximum trade effluent, and the heavy metal in waste water generally can not decompose destruction, can only shift it and there is position and change its Material Form. Treatment process can be divided into two classes: one is make to be transformed into insoluble heavy metal compound or element in the heavy metal of dissolved state in waste water, through precipitation and removal from waste water of floating, moderate water-cut stage, sulphide precipitation, floating partition method, ion flotation method, electrowinning or electrolysis floating method, membrane electrolysis etc. can be applied; Two is carry out the heavy metal in waste water when not changing its chemical form concentrating and being separated, and can apply reverse osmosis method, electroosmose process, method of evaporation, ion exchange method etc.
What existing heavy metal waste water treatment process often adopted has chemical precipitation method, ion exchange method etc. After chemical precipitation processes, the heavy metal in waste water is transformed into insoluble chemical compound and precipitate from the ionic condition dissolved, and transfers in mud from water; After ion exchange treatment, the metal ion in waste water is transferred on ion exchange resin, transfers in regeneration waste liquid again after regeneration from ion exchange resin. The process for treating heavy-metal waste water of domestic usual employing, comprises limestone vegetation method and sulfuration method etc. These traditional treatment process, although can be fallen by the heavy metals removal in waste water, but process effect is also unstable, and the clear water water quality reclaimed after process is still difficult to guarantee that stably reaching standard discharges, but also can produce secondary pollution.
Research shows, many algae have the ability of enriched in metals, its absorption property is often higher than other biological, marine alga is the biology the most widely that distributes in the world, at fresh water, the trace of marine alga can be seen in ocean and land, numerous species can also grow in extreme circumstances, there is very strong resistance, the selective adsorption of heavy metal and adsorption efficiency are determine by the character of cell walls to a great extent, the negative charge that alga cells wall band is certain, there is bigger surface-area and viscosity, many functional groups can be provided such as hydroxyl, carboxyl, amino, amide group, phosphate radicals etc. are combined with metal ion.The cell walls main component of marine alga is peptidoglycan, peptidoglycan can complexing is a large amount of from the aqueous solution metal ion, particularly most of transition metal, and the sticky gum sheath main component of cell wall is acidic mucopolysaccharide or pectin substance, there is stronger absorption small-particle and the ability of metal ion.
There is people that blue-green algae is applied to Sewage treatment systems at present, the method of aeration tank is mainly then rendered to by cultivating separately blue-green algae, but it is even dead that the microorganism adherings such as bacteriums a large amount of in aeration tank can cause blue-green algae to grow on blue-green algae, so just need ceaselessly to throw in, treatment cost is high, on the other hand the blue-green algae in aeration tank may blocking pipeline, the operation that affects equipment, and live body blue-green algae deals with improperly excessive breeding can be caused to cause " wawter bloom ", causes water pollution. How blue-green algae is turned waste into wealth and utilize its characterization of adsorption process heavy metal wastewater thereby to have very dark Research Significance.
Summary of the invention
For prior art exist deficiency, technical problem to be solved by this invention is, it is provided that a kind of with low cost, there is good filtration, absorption property utilize kelp process heavy metal wastewater thereby technique.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of technique utilizing kelp process heavy metal wastewater thereby, comprises following operation: (1) Wastewater Pretreatment; (2) non-active kelp filtering basin process; (3) non-active kelp adsorption tank process; (4) reverse osmosis membrane assembly removes residue heavy metal ion (5) qualified discharge.
Further, described Wastewater Pretreatment comprises grid, preliminary sedimentation tank.
Further, described for the preparation technology of non-active kelp filtering basin and the kelp of non-active kelp adsorption tank, comprise the following steps:
A. pre-treatment
Use is fished for device and is fished for fresh kelp, and utilizes seawater to clean, and removes the impurity such as silt;
B. pickling
Utilize acid solution embathe step a process after kelp, remove the metal ions such as the calcium of surface adsorption, magnesium, sodium, increase the adsorption site of kelp;
C. rotproofing
Kelp after being processed by step b immerses in antiseptic treating agent, soaks 0.5～1h, increases the antiseptic property of kelp;
D. alkalinisation treatment
Immerse in alkaline solution after kelp after step c rotproofing is cleaned, alkalization 0.5～1h;
E. immobilization process
Kelp after steps d being processed immerses in cross-linking agent solution, soaks 1～2h, increases physical strength, stability and absorption property;
F. aftertreatment
To process after complete kelp uses clean water 2～3 times in step e, the swiftly flowing High-Pressure Water utilizing spunlaced device to produce sprays kelp so that it is be wound around mutually, gain in strength, then decompress filter, it is pressed into cake, dry, obtained finished product.
Further, in described step b, acid solution is massfraction is the hydrochloric acid soln of 5%～10%, in step c antiseptic treating agent to be massfraction be 0.01%～0.1% dehydro-acetic acid sodium solution, in steps d, alkaline solution is massfraction is the sodium hydroxide solution of 3%～5%, cross-linking agent solution to be massfraction the be perchloric acid of 3%～10%, the one in acetic acid or formaldehyde in step e.
Further, described kelp is one or more in brown alga, spirulina, anabena, beads algae, Enteromorpha.
Compared with prior art, the invention has the advantages that:
(1) take kelp as raw material, wide material sources, with low cost;
(2) negative charge that large-scale seaweed cell wall band is certain, there is bigger surface-area and viscosity, many functional groups such as hydroxyl, carboxyl, amino etc. can be provided to be combined with metal ion, and peptidoglycan in cell walls can complexing is a large amount of from the aqueous solution metal ion, there is stronger absorption small-particle and the ability of metal ion;
(3) fluctuation of heavy metal wastewater thereby pH value is bigger, poisonous metal and other biological toxic chemical content are higher, often exceed the tolerance of algae, and usually lacking the necessary nutritive substance of algal grown, the biological activity of algae is difficult to long-time maintenance, and the dead cell of kelp has even higher loading capacity similar to viable cell, it is applied to sewage disposal not to be subject to the restriction of Toxic in water, do not require to provide nutrition, replace tradition sorbing material, turn waste into wealth, save cost;
(4) after the treatment process of the non-active kelp of the present invention, there is better filter effect and absorption property, loading capacity is big, can effectively except the heavy metal ion in decontaminated water, organic pollutant and inorganic pollutant, purifying water, and intensity increases, antiseptic property improves greatly, can regularly change, secondary pollution can not be caused;
(5) heavy metal waste water treatment process of the present invention is simple, cost is lower, non-active kelp filtering basin and non-active kelp adsorption tank are set respectively before reverse osmosis process, increase the water treatment effect of kelp, it is convenient to regular replacing, alleviate the pollution load of reverse osmosis membrane assembly simultaneously, reduce the replacing number of times of membrane module.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the present invention;
Fig. 2 is preparation technology's schema of the non-active kelp of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further details.
Embodiment 1
Utilize a technique for kelp process heavy metal wastewater thereby, comprise following operation: (1) Wastewater Pretreatment; (2) non-active kelp filtering basin process; (3) non-active kelp adsorption tank process; (4) reverse osmosis membrane assembly removes residue heavy metal ion (5) qualified discharge.
Described Wastewater Pretreatment comprises grid, preliminary sedimentation tank.
Described for the preparation technology of non-active kelp filtering basin and the kelp of non-active kelp adsorption tank, comprise the following steps:
A. pre-treatment
Use is fished for device and is fished for fresh kelp, and utilizes seawater to clean, and removes the impurity such as silt;
B. pickling
Utilize massfraction be 5% hydrochloric acid soln embathe step a process after kelp, remove the metal ions such as the calcium of surface adsorption, magnesium, sodium, increase the adsorption site of kelp;
C. rotproofing
Kelp after being processed by step b immerses in the dehydro-acetic acid sodium solution that massfraction is 0.01%, soaks 0.5h, increases the antiseptic property of kelp;
D. alkalinisation treatment
Immerse in the sodium hydroxide solution that massfraction is 3% after kelp after step c rotproofing is cleaned, alkalization 0.5h;
E. immobilization process
Kelp after steps d being processed immerses in the perchloric acid solution that massfraction is 3%, soaks 1h, increases physical strength, stability and absorption property;
F. aftertreatment
By step e processing after complete kelp uses clean water 2 times, utilize the swiftly flowing High-Pressure Water injection kelp that spunlaced device produces so that it is be wound around mutually, gain in strength, then decompress filter, be pressed into cake, dry, obtain finished product.
Described kelp is Enteromorpha.
Embodiment 2
Utilize a technique for kelp process heavy metal wastewater thereby, comprise following operation: (1) Wastewater Pretreatment; (2) non-active kelp filtering basin process; (3) non-active kelp adsorption tank process; (4) reverse osmosis membrane assembly removes residue heavy metal ion (5) qualified discharge.
Described Wastewater Pretreatment comprises grid, preliminary sedimentation tank.
Described for the preparation technology of non-active kelp filtering basin and the kelp of non-active kelp adsorption tank, comprise the following steps:
A. pre-treatment
Use is fished for device and is fished for fresh kelp, and utilizes seawater to clean, and removes the impurity such as silt;
B. pickling
Utilize massfraction be 10% hydrochloric acid soln embathe step a process after kelp, remove the metal ions such as the calcium of surface adsorption, magnesium, sodium, increase the adsorption site of kelp;
C. rotproofing
Kelp after being processed by step b immerses in the dehydro-acetic acid sodium solution that massfraction is 0.1%, soaks 1h, increases the antiseptic property of kelp;
D. alkalinisation treatment
Immerse in the sodium hydroxide solution that massfraction is 5% after kelp after step c rotproofing is cleaned, alkalization 1h;
E. immobilization process
Kelp after steps d being processed immerses in the acetic acid solution that massfraction is 10%, soaks 2h, increases physical strength and absorption property;
F. aftertreatment
By step e processing after complete kelp uses clean water 3 times, utilize the swiftly flowing High-Pressure Water injection kelp that spunlaced device produces so that it is be wound around mutually, gain in strength, then decompress filter, be pressed into cake, dry, obtain finished product.
Described kelp is brown alga.
In sum, the heavy metal waste water treatment process of the present invention is simple, cost is lower, non-active kelp filtering basin and non-active kelp adsorption tank are set respectively before reverse osmosis process, increase the water treatment effect of kelp, it is convenient to regular replacing, alleviate the pollution load of reverse osmosis membrane assembly simultaneously, reduce the replacing number of times of membrane module; There is better filter effect and absorption property after the treatment process of the kelp of the present invention, loading capacity is big, can effectively except the heavy metal ion in decontaminated water, organic pollutant and inorganic pollutant, intensity increases, antiseptic property improves greatly, can regularly change, secondary pollution can not be caused.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited to above-mentioned citing; those skilled in the art; in the essential scope of the present invention, change, remodeling, interpolation or the replacement made, all should belong to protection scope of the present invention.
Claims (7)
1. one kind utilizes the technique of kelp process heavy metal wastewater thereby, it is characterised in that, comprise following operation: (1) Wastewater Pretreatment; (2) non-active kelp filtering basin process; (3) non-active kelp adsorption tank process; (4) reverse osmosis membrane assembly removes residue heavy metal ion (5) qualified discharge, described for the preparation technology of non-active kelp filtering basin and the kelp of non-active kelp adsorption tank, comprises the following steps:
A. pre-treatment
Use is fished for device and is fished for fresh kelp, and utilizes seawater to clean, and removes the impurity such as silt;
B. pickling
Utilize acid solution embathe step a process after kelp, remove the metal ions such as the calcium of surface adsorption, magnesium, sodium, increase the adsorption site of kelp;
C. rotproofing
Kelp after being processed by step b immerses in antiseptic treating agent, soaks 0.5～1h, increases the antiseptic property of kelp;
D. alkalinisation treatment
Immerse in alkaline solution after kelp after step c rotproofing is cleaned, alkalization 0.5～1h;
E. immobilization process
Kelp after steps d being processed immerses in cross-linking agent solution, soaks 1～2h, increases physical strength, stability and absorption property;
F. aftertreatment
To process after complete kelp uses clean water 2～3 times in step e, the swiftly flowing High-Pressure Water utilizing spunlaced device to produce sprays kelp so that it is be wound around mutually, gain in strength, then decompress filter, it is pressed into cake, dry, obtained finished product.
2. a kind of technique utilizing kelp process heavy metal wastewater thereby according to claim 1, is characterized in that: described kelp is one or more in brown alga, spirulina, anabena, beads algae, Enteromorpha.
3. a kind of technique utilizing kelp process heavy metal wastewater thereby according to claim 1, is characterized in that: described pre-treatment comprises grid, preliminary sedimentation tank.
4. a kind of technique utilizing kelp process heavy metal wastewater thereby according to claim 1, is characterized in that: in described step b, acid solution is massfraction is the hydrochloric acid soln of 5%～10%.
5. a kind of technique utilizing kelp process heavy metal wastewater thereby according to claim 1, is characterized in that: in described step c antiseptic treating agent to be massfraction be 0.01%～0.1% dehydro-acetic acid sodium solution.
6. a kind of technique utilizing kelp process heavy metal wastewater thereby according to claim 1, is characterized in that: in described steps d, alkaline solution is massfraction is the sodium hydroxide solution of 3%～5%.
7. a kind of technique utilizing kelp process heavy metal wastewater thereby according to claim 1, is characterized in that: cross-linking agent solution to be massfraction the be perchloric acid of 3%～10%, the one in acetic acid or formaldehyde in described step e.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224526.7A CN105668839A (en) | 2016-04-12 | 2016-04-12 | Technology for treating heavy metal waste water through macroalgae |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610224526.7A CN105668839A (en) | 2016-04-12 | 2016-04-12 | Technology for treating heavy metal waste water through macroalgae |
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| CN105668839A true CN105668839A (en) | 2016-06-15 |
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| CN201610224526.7A Pending CN105668839A (en) | 2016-04-12 | 2016-04-12 | Technology for treating heavy metal waste water through macroalgae |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107597069A (en) * | 2017-10-20 | 2018-01-19 | 烟台宇诚企业管理咨询有限公司 | It is a kind of degerming except the sorbing material of formaldehyde containing marine organism extract |
| CN110357266A (en) * | 2019-07-15 | 2019-10-22 | 浙江海洋大学 | Utilize the method for heavy metal ion in sargassum thunbergii removal polluted-water |
| CN113213637A (en) * | 2021-04-27 | 2021-08-06 | 深圳市蓝汀鼎执生物科技有限公司 | Optimized treatment method for removing heavy metals in seawater based on salinity and ion regulation |
-
2016
- 2016-04-12 CN CN201610224526.7A patent/CN105668839A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107597069A (en) * | 2017-10-20 | 2018-01-19 | 烟台宇诚企业管理咨询有限公司 | It is a kind of degerming except the sorbing material of formaldehyde containing marine organism extract |
| CN110357266A (en) * | 2019-07-15 | 2019-10-22 | 浙江海洋大学 | Utilize the method for heavy metal ion in sargassum thunbergii removal polluted-water |
| CN110357266B (en) * | 2019-07-15 | 2022-01-11 | 浙江海洋大学 | Method for removing heavy metal ions in polluted water body by using sargassum thunbergii |
| CN113213637A (en) * | 2021-04-27 | 2021-08-06 | 深圳市蓝汀鼎执生物科技有限公司 | Optimized treatment method for removing heavy metals in seawater based on salinity and ion regulation |
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Application publication date: 20160615 |