CN107445390A - A kind of " three-stage process " biodegradation method for being used to administer heavy metal - Google Patents
A kind of " three-stage process " biodegradation method for being used to administer heavy metal Download PDFInfo
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- CN107445390A CN107445390A CN201610374924.7A CN201610374924A CN107445390A CN 107445390 A CN107445390 A CN 107445390A CN 201610374924 A CN201610374924 A CN 201610374924A CN 107445390 A CN107445390 A CN 107445390A
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- heavy metal
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- stalk
- wastewater
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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
- 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
- C02F1/28—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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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)
- Water Treatment By Sorption (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention discloses a kind of " three-stage process " biodegradation method for being used to administer heavy metal, and processing step is as follows：1) heavy metal wastewater thereby of discharge is entered in the stalk groove from stalk trench bottom, suitable control water inlet flow velocity, it is ensured that effective adsorption time of 3 hours；2) enter artificial wet land system from the stalk groove from the clear liquid that flows out, using its unique matrix-plant-microbial ecosystem, by the heavy metal in effect reduction waste water such as adsorbing, precipitating and be enriched with；3) waste water by artificial wet land system processing enters Aerobic Pond, and the content of beary metal in waste water is further reduced by the surface complexation of Microbial Communities in Activated Sludge, biological adsorption and flocculation in pond.The present invention administers heavy metal wastewater thereby using " waste straw-water plant-microorganism " three-stage process biodegradation method, and effectively using agricultural wastes, cost is cheap, thorough, the environment-friendly non-secondary pollution of heavy metal processing, and technique is simple, and operation management is convenient.
Description
Technical field
The present invention relates to heavy metal-polluted water harnessing field, specially a kind of " three-stage process " for being used to administer heavy metal
Biodegradation method.
Background technology
At present, heavy metal wastewater thereby source is wide, water is big, heavy metal wastewater thereby be mainly derived from plating, mining,
The industry such as chemical industry, electrolysis, agricultural chemicals, medicine, tobacco, paint, pigment, such waste water have toxic effect long-term
Persistently, the features such as biological non-degradable, human body is entered by food chain effect, and accumulated in human body, from
And cause various diseases and disorder, finally health is caused to seriously endanger.With China's industry
Fast development, heavy metal wastewater thereby largely discharge, heavy metal pollution getting worse, how to its it is effective administer,
The problem of recycling is paid close attention to jointly as people.
Heavy metal, which administers common method, three kinds：1) chemical method, by adding medicament, by heavy metal ion
Precipitation is changed into, so as to remove.This method is high to high-concentration heavy metal waste water treatment effeciency, easily has
Harmful accessory substance, and produce that waste residue amount is larger causes secondary pollution；2) physical-chemical process, waste water is not changed
The chemical form of middle heavy metal, it is adsorbed, concentrated, separated, even recycled, but be processed into
This is higher, it is difficult to extensive use；3) bioanalysis, by organism and its derivative to heavy metal in water from
The effects such as absorption absorption, flocculation and the enrichment of son are removed.Bioanalysis heavy metal ion has stronger suction
Attached conversion capability, to organic matter better tolerance, do not influenceed as Organic Pollution≤5000mg/L to a huge sum of money
Belong to the absorption of ion；Have the characteristics that economical, efficient, environmentally friendly, but be only adapted to middle low-concentration heavy metal and give up
Water process.Existing single heavy metal method of wastewater treatment is there is a variety of deficiencies, it is necessary to one or more side
Method, which is used in combination, more effectively solves the problems, such as heavy metal pollution.
China is large agricultural country, and annual caused agricultural wastes are up to more than one hundred million tons.These discarded objects quilt mostly
Directly abandon, more there are some to be incinerated, environment, production and life are caused greatly to influence.And foreign countries are
Have largely on research of the agricultural wastes to wastewater treatment, the voidage of agricultural wastes is higher, compares surface
Product is larger, physical absorption, agricultural wastes main component cellulose, hemicellulose can occur with metal ion
Substantial amounts of group living is contained on element, lignin and pectin surface, and such as carboxyl, hydroxyl, these active groups can
By with heavy metal ion by combined with a manner of ion exchange, chelant etc., reaching the purpose of heavy-metal ion removal.
To make such Natural organic sorbents have comparatively ideal adsorption capacity, more hydroxyls need to be introduced by chemical modification
Base, carboxyl, sulfydryl, phosphate radical, amido isoreactivity group, such as citric acid modification, basification, sulfydryl
It is modified etc..Agricultural wastes after chemical modification are as efficient Natural organic sorbents, not only by agriculture
Industry utilization of waste as resource is got up, and reduces environmental pollution, simultaneously because being enriched with raw material sources, product
The features such as kind is more, cost is cheap, adsorption capacity is big, adsorption plant is simple, product is degradable, than with good
Good absorption property but expensive activated carbon has broader market prospects.
The content of the invention
Technical problem solved by the invention is to provide a kind of " three-stage process " biology for being used to administer heavy metal
Biodegrading process, to solve the shortcomings that in above-mentioned background technology.
Technical problem solved by the invention is realized using following technical scheme：One kind is used to administer heavy metal
" three-stage process " biodegradation method, processing step is as follows：
1) a stalk groove is provided with the exit in the heavy metal wastewater thereby pond that content of beary metal is 50-500mg/L,
The heavy metal wastewater thereby of the heavy metal wastewater thereby pond discharge will enter the stalk from the bottom of the stalk groove
In groove, the flow control of the heavy metal wastewater thereby is ensureing effective adsorption time of 3 hours；2) from described
Stalk groove enters artificial wet land system from the clear liquid that flows out, matrix-plant in the artificial wet land system
- microbial ecosystem can by adsorb, precipitate and enrichment reduce waste water in heavy metal；3) exist
The treated waste water of artificial wet land system is traveled further into Aerobic Pond, the activity in the Aerobic Pond
Microorganism is cultivated in sludge, the Aerobic Pond sludge seeding amount is the 20% of pond appearance, continuous aeration in pond,
Dissolved oxygen 2-4mg/L, pH is controlled to be adjusted to 6.5-8.5, and will according to the content of organic matter in heavy metal wastewater thereby
Hydraulic detention time is set as 10-24 hours.Pass through the surface complexation of Microbial Communities in Activated Sludge, life in pond
Thing absorption and flocculation further reduce the content of beary metal in waste water, stabilize it and reach《Integrated wastewater
Discharge standard》Primary standard.
In the present invention, further, launched in the stalk groove can be maize straw, wheat stalk,
A kind of agricultural wastes in peanut shell, megasse or rice husk, these agricultural wastes are subjected to primary cut
Processing is cut, these processed agricultural wastes are such Natural organic sorbents is had comparatively ideal absorption
Ability, while these agricultural wastes are subjected to after-treatment, pass through the sour modification of lemon, basification, sulfydryl
Modified chemical modification mode introduces more hydroxyls, carboxyl, sulfydryl, phosphoric acid in these agricultural wastes
Root, amido active group.
In the present invention, further, the Wetland Substrate in the artificial wet land system presses 1 by gravel, soil:1
Composition, the water plant planted on the Wetland Substrate is by the stronger reed of heavy metal absorbability, perfume (or spice)
Pu, canna, cyperus alternifolius composition, by the physical sedimentation of artificial swamp, filtering, chemical precipitation, absorption,
Microorganism reciprocation and the absorption of plant, realize effective removal of heavy metal.
In the present invention, further, heavy metal wastewater thereby by " waste straw-water plant " absorption, precipitation,
After enrichment, content of beary metal is far below《Integrated wastewater discharge standard》Primary standard.
Beneficial effects of the present invention：
1st, the present invention is controlled using " waste straw-water plant-microorganism " three-stage process biodegradation technique
Low concentration heavy metal water in reason, it is enriched with by the absorption of the efficient absorption of modified straw, water plant and good
The synergy of complexing, metabolism and bioflocculation of microorganism etc. in oxygen pond, can be by the heavy metal in waste water
Extremely low level, and the environment-friendly non-secondary pollution of whole set process are reduced to, technique is simple, operation management side
Just.
2nd, modified agricultural crop straw has abundant as environmentally friendly new bio sorbing material
Pore structure, huge specific surface area, good absorption property, have that raw material sources are extensive, cost is low concurrently
The advantages such as honest and clean, easily biological-degradable, while agricultural wastes recycling is got up, reduce environmental pollution.
Brief description of the drawings
Fig. 1 is a kind of " three-stage process " biodegradation method schematic diagram for being used to administer heavy metal of the present invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand,
With reference to being specifically illustrating, the present invention is expanded on further.
Embodiment：As shown in figure 1, embodiment：A kind of " three-stage process " biology for being used to administer heavy metal
Biodegrading process, its step are as follows：
First, heavy metal wastewater thereby is intake from stalk trench bottom, when coutroi velocity ensures effective absorption of 3 hours
Between.To improve the absorption property of stalk, it need to be chemically modified, increase its active group；
2nd, enter artificial wet land system from stalk groove from the clear liquid flowed out, utilize its unique matrix-plant
Thing-microbial ecosystem, heavy metal in waste water is reduced by the effect such as adsorbing, precipitating and be enriched with；
3rd, Aerobic Pond is subsequently entered, passes through the surface complexation, biological adsorption and wadding of Microbial Communities in Activated Sludge
Solidifying effect further reduces content of beary metal, reaches discharge standard.
Content of beary metal is between 50-500mg/L in the heavy metal wastewater thereby being processed in the step 1.
What is launched in the step 1 in stalk groove can be maize straw, wheat stalk, peanut shell, beet
A kind of agricultural wastes in slag or rice husk etc., it is cut to 5cm or so segment.Agriculture waste owner
Composition fiber element, hemicellulose, lignin and pectin surface is wanted to contain substantial amounts of group living, such as carboxyl, hydroxyl
Base etc., these active groups can be with heavy metal ion by combined with the modes such as ion exchange, chelant, reaching
The purpose of heavy-metal ion removal.To make such Natural organic sorbents have comparatively ideal adsorption capacity, need to lead to
Cross chemical modification and introduce more hydroxyls, carboxyl, sulfydryl, phosphate radical, amido isoreactivity group, such as lemon
Sour modification, basification, sulfhydryl modified etc..
Artificial swamp matrix presses 1 by gravel, soil in the step 2:1 composition, water plant is by a huge sum of money
Belong to the compositions such as the stronger reed of absorbability, cattail, canna, cyperus alternifolius.Pass through the physics of artificial swamp
Precipitation, filtering, chemical precipitation, absorption, microorganism reciprocation and the absorption of plant, realize weight
Effective removal of metal.According to the concentration of heavy metal wastewater thereby, the residence time of adjustable artificial swamp exists
20-48h。
Heavy metal wastewater thereby is by " waste straw-water plant " absorption, precipitation, enrichment in the step 3
After effect, heavy metal concentration is remarkably decreased, then heavy metal can be dropped into pole in the presence of Aerobic Pond microorganism
Low level.Aerobic Pond sludge seeding amount is the 20% of pond appearance, continuous aeration in pond, controls dissolved oxygen
2-4mg/L, pH are adjusted to 6.5-8.5, and during according to the content of organic matter in heavy metal wastewater thereby by hydraulic retention
Between be set as 10-24 hours.
The general principle and principal character and advantages of the present invention of the present invention, the industry has been shown and described above
Technical staff it should be appreciated that the present invention is not limited to the above embodiments, in above-described embodiment and specification
Description merely illustrates the principles of the invention, without departing from the spirit and scope of the present invention, the present invention
Various changes and modifications are also had, these changes and improvements all fall within the protetion scope of the claimed invention, this
The claimed scope of invention is by appended claims and its equivalent thereof.
Claims (3)
- A kind of 1. " three-stage process " biodegradation method for being used to administer heavy metal, it is characterised in that processing step It is rapid as follows：1) a stalk groove is provided with the exit in the heavy metal wastewater thereby pond that content of beary metal is 50-500mg/L, The heavy metal wastewater thereby of the heavy metal wastewater thereby pond discharge will enter the stalk from the bottom of the stalk groove In groove, the flow control of the heavy metal wastewater thereby is ensureing effective adsorption time of 3 hours；2) artificial wet land system, the artificial wet land system are entered from the stalk groove from the clear liquid flowed out In matrix-plant-microbial ecosystem can by adsorb, precipitate and enrichment reduce waste water in Heavy metal；3) traveled further into the treated waste water of the artificial wet land system in Aerobic Pond, it is described aerobic Microorganism is cultivated in activated sludge in pond, the Aerobic Pond sludge seeding amount is the 20% of pond appearance, in pond Continuous aeration, control dissolved oxygen 2-4mg/L, pH are adjusted to 6.5-8.5, and according to organic in heavy metal wastewater thereby Hydraulic detention time is set as 10-24 hours by the content of thing.Pass through the table of Microbial Communities in Activated Sludge in pond Face complexing, biological adsorption and flocculation further reduce the content of beary metal in waste water, stabilize it and reach 《Integrated wastewater discharge standard》Primary standard.
- 2. a kind of " three-stage process " biodegradation method for being used to administer heavy metal according to claim 1, It is characterized in that：What is launched in the stalk groove can be maize straw, wheat stalk, peanut shell, beet A kind of agricultural wastes in slag or rice husk, these agricultural wastes are carried out to primary cutting process, these Processed agricultural wastes simultaneously will to make such Natural organic sorbents have comparatively ideal adsorption capacity These agricultural wastes carry out after-treatment, are changed by the sour modification of lemon, basification, sulfhydryl modified chemistry Property mode introduced in these agricultural wastes more hydroxyls, carboxyl, sulfydryl, phosphate radical, amido activity Group.
- 3. a kind of " three-stage process " biodegradation method for being used to administer heavy metal according to claim 1, It is characterized in that：Wetland Substrate in the artificial wet land system presses 1 by gravel, soil:1 composition, in institute State the water plant planted on Wetland Substrate by the stronger reed of heavy metal absorbability, cattail, canna, Cyperus alternifolius forms, and is interacted by the physical sedimentation of artificial swamp, filtering, chemical precipitation, absorption, microorganism Effect and the absorption of plant, realize effective removal of heavy metal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610374924.7A CN107445390A (en) | 2016-05-31 | 2016-05-31 | A kind of " three-stage process " biodegradation method for being used to administer heavy metal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610374924.7A CN107445390A (en) | 2016-05-31 | 2016-05-31 | A kind of " three-stage process " biodegradation method for being used to administer heavy metal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108109713A (en) * | 2017-12-13 | 2018-06-01 | 四川知创空间孵化器管理有限公司 | A kind of processing method of radioactivity medical waste water |
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|---|---|---|---|---|
| CN102285740A (en) * | 2010-06-21 | 2011-12-21 | 天津科技大学 | Non-waste treatment method for garbage leachate |
| US8252182B1 (en) * | 2008-09-11 | 2012-08-28 | University Of Central Florida Research Foundation, Inc. | Subsurface upflow wetland system for nutrient and pathogen removal in wastewater treatment systems |
| CN105036487A (en) * | 2015-08-18 | 2015-11-11 | 湖南艾布鲁环保科技有限公司 | Device and method for further treating and recycling heavy metal waste water |
-
2016
- 2016-05-31 CN CN201610374924.7A patent/CN107445390A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8252182B1 (en) * | 2008-09-11 | 2012-08-28 | University Of Central Florida Research Foundation, Inc. | Subsurface upflow wetland system for nutrient and pathogen removal in wastewater treatment systems |
| CN102285740A (en) * | 2010-06-21 | 2011-12-21 | 天津科技大学 | Non-waste treatment method for garbage leachate |
| CN105036487A (en) * | 2015-08-18 | 2015-11-11 | 湖南艾布鲁环保科技有限公司 | Device and method for further treating and recycling heavy metal waste water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108109713A (en) * | 2017-12-13 | 2018-06-01 | 四川知创空间孵化器管理有限公司 | A kind of processing method of radioactivity medical waste water |
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Application publication date: 20171208 |