CN1541952A - Technique for harnessing water bloom and bed mud secondary pollution using lake sediment - Google Patents
Technique for harnessing water bloom and bed mud secondary pollution using lake sediment Download PDFInfo
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- CN1541952A CN1541952A CNA2003101133055A CN200310113305A CN1541952A CN 1541952 A CN1541952 A CN 1541952A CN A2003101133055 A CNA2003101133055 A CN A2003101133055A CN 200310113305 A CN200310113305 A CN 200310113305A CN 1541952 A CN1541952 A CN 1541952A
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Abstract
The present invention provides one comprehensive technology of utilizing eutrophic and algalbloom polluted precipitant in in-situ algae killing, ventilation and phosphate fixing. By means of the said technology, bed mud or bankside clay is used in treating algalbloom in low cost. The said technology can eliminate algae effectively, increase dissolved oxygen concentration in water, reduce H2S and NH3-N produced, improve water quality, speed the degradation of organic in water, increase calcium in water, make bottom matter loose and ventilating, minimize and fix water body, bed mud and deposited phosphor in algae cell for no further utilization by living things. The present invention may be used in comprehensive treatment of red tide in sea, water bloom in fresh water, etc.
Description
Technical field
The present invention relates to a kind of improvement body eutrophication, the settling original position of fresh water bloom is removed algae, oxygenation, solid phosphorus complex art.Specifically, be to adopt local settling that is easy to get or bank clay etc. through dephosphorization denitrogenation and removal organism, and use safety, effectively after settling/clay alteration agent modification, the harmful algae of be used for condensing, water body being removed in sedimentation, play the effect that improves excessive phosphorus at the bottom of water-bed anaerobic environment and the mineralized water simultaneously, with reach comprehensive who administer the wawter bloom purpose.
Background technology
The eutrophication in natural sea-water, lake and river can cause the outburst (be commonly called as in seawater be red tide, be commonly called as in the fresh water be wawter bloom) of harmful algae to become global problem of environmental pollution.It not only makes water quality severe exacerbation, oxygen deprivation, causes a large amount of fish kills, and the algae toxin can enter food chain and causes human diseases even death.Phosphorus is the limiting factor of algal tufa outburst in fresh water.Up to the present, still not having technology in the world can be safely, effectively, economical, synthetically administer this class big scale natural disaster (Anderson, D.M., 1997 Turning back the harmful red tide, Nature, 388,513-514.).It comprehensively is four big classes that disclosed in the past technology can be concluded: chemistry is killed method, biological restraint method, air supporting collecting method, and flocculation sedimentation.Chemistry is killed method because of the pollution of chemical algicide to environment itself, is forbidden by multinational ENVIRONMENTAL LAW.Biological process comprises with microorganism or virus kills frustule.This method is difficult to extensively, uses on a large scale because of reasons such as selectivity restriction, preparation cycle length, cost height.A kind of virus often only has the single-minded activity of killing to a kind algae.Owing to cause that the algae kind of red tide or wawter bloom is various, also because the outburst of red tide and wawter bloom has suddenly, be difficult to go out to have in a large number at a certain algal species cultivation in a short time the virus of the single-minded property killed simultaneously.In addition, because algae can produce resistance and immunity to infecting of virus, same virus is difficult to certain algae is continued the performance killing action.The air supporting collecting method is a kind of way with container mechanical harvest algae, is difficult to be applied to the removing (consuming time, consumption money) that the big area natural water body pollutes.Flocculation sedimentation comprises and uses chemical floc and with clay sedimentation algae.Chemical floc (such as composite polymeric aluminium, iron etc.) great majority have toxicity, and they have disturbed the coenosis under the state of nature, have destroyed the eubiosis, and may cause hydrobiont death, have been acknowledged as to be used for natural aquatic system.Up to the present, to be known as most promising method be clay method to international scientific circle.
Disclosed now about in the method for clay, useful mineral acid (sulfuric acid) is handled the method (JP57131119) of clay (if you would take off soil), the method of useful hydrogen peroxide treatment clay (JP03255008), have tensio-active agent and clay blended method (JP09154466), have unsaturated fatty acids and clay blended method (US6071859).The inventor had once proposed with a kind of based on moisture magnesium silicate (as sepiolite) in calendar year 2001, patented technology (application number: 01134528.4) with frustule in the clay flocculating sedimentation water body, and proposed in 2002 a kind ofly to prepare a kind of efficiently with the natural polymers modified clay, nontoxic alga flocculating agent is administered the patented technology (application number: 02155284.3) of algal tufa.But these clay algae removal technologies all have its defective: the clay that adds has increased water bottom bed mud and sedimental accumulation, causes the negative effect of bed mud alluvial; External clay may exert an influence to hydrobiont; Be deposited to water-bed algae death, rotten decomposition will consume a large amount of oxygen, causes water-bed anaerobic environment, destroys water quality; And aforesaid method does not solve or alleviates the eutrophication degree of water body, often outburst once more after a week or several weeks of algal tufa.Therefore, develop safely, cheap, have long-lasting eutrophication and algal tufa process for comprehensively treating is the direction in this field always.
Summary of the invention
The purpose of this invention is to provide a kind of settling of harmful algae pollutions such as red tide of sea, fresh water bloom, river course or complex art that bank clay original position is removed algae, oxygenation, solid phosphorus administered.In this technology, adopt local cheap, bed mud that is easy to get or clay etc. are through dephosphorization denitrogenation and remove organism, and after carrying out modification with the oxygenation phosphor-curing agent, in harmful algae in efficient flocculating removal natural water, play the oxygenation that improves water-bed anaerobic environment and remove phosphorus in the water body, solid phosphorus effect.This technology can be taken the improvement that is used for algal tufa after local bed mud or the bank clay treatment, has reduced transit link, has reduced cost; Bed mud has reduced nutritive element and pollutents such as phosphorus, nitrogen through dephosphorization denitrogenation and removal treatment of organic matters of organic; When water body top layer algae is removed in sedimentation, lasting, effectively increase in the water body, particularly the dissolved oxygen concentration of bottom water body has reduced H
2S and NH
3The generation of-N helps improving water quality, accelerates organic degraded removal in the water body; It is calcareous to increase water body, improves water pH value, makes substrate loose ventilative; More can solidify the phosphorus in water body, bed mud and the settled frustule, form phosphorus ore containing, make it can not be biological utilisation again.The present invention can be used for big area red tide of sea, the fresh water bloom that comprehensive regulation eutrophication causes, and also is applicable to river regulation.
Specifically, the method for comprehensive regulation red tide of sea provided by the invention and fresh water bloom adopts local cheaply, and bed mud that is easy to get or clay clean and modification is carried out after handling.
The cleaning of settling or clay comprises carries out dephosphorization denitrogenation to it, removes treatment of organic matters of organic such as humic acid.The modification of bed mud or clay comprises with can not causing secondary pollution to environment, and is natural, nontoxic, be easy to biodegradable high molecular polymer modification and handle clay, and adds the oxygenation phosphor-curing agent that can react with phosphorus.
One of feature of oxygenation phosphor-curing agent among the present invention is extremely water insoluble, contacts with water and can react, and discharge oxygen lentamente lastingly, improves the dissolved oxygen of water body.
Another feature of oxygenation phosphor-curing agent among the present invention is that its metallic cation that contains can generate with phosphorus reaction, and is water-fast, the phosphorus ore containing that chemical property is stable.
Oxygenation phosphor-curing agent among the present invention is a superoxide, percarbonate or other high oxygen containing compound.
Natural polymers among the present invention can be chitosan and derivative, chitin and derivative thereof etc.
Oxygen sustained release dosage among the present invention can be one or more mixing in the mixture of calcium peroxide, percarbonic acid calcium, Magnesium peroxide, SPC-D and zeolite.
The characteristics of above-mentioned comprehensive regulation eutrophication and algal tufa technology are bed mud or bank clay high molecular polymer and the modifications of oxygenation phosphor-curing agent after the above-mentioned cleaning, and the ratio of oxygenation phosphor-curing agent and bed mud can be determined on a case-by-case basis, proportional range is 1: 1～1: 10 o'clock, and then right frustule flocculation and the sedimentation capacity of the bed mud of this modification can significantly improve.
The method of comprehensive regulation eutrophication provided by the invention and algal tufa, its consumption is decided by the nutrient laden of processed seawater and fresh water and the situation of algal tufa degree, but preferably is no less than 0.001g/l.Usually administering in red tide of sea and the fresh water bloom, when the consumption that uses alga flocculating agent of the present invention during as 0.001-0.1g/l, its frustule clearance can reach 88～99%, and water-bed oxygen concn can improve 10～1000 times, and the concentration of phosphorus can reduce 50～80% in the water body.
For example, when the microcystic aeruginosa cell concn be 5 * 10
6During cell/ml, add the bed mud that 0.010g/l handles by the inventive method, the frustule concentration after 0.5 hour in the water body has reduced that the frustule concentration in the water body has reduced by 97% after 80%, 4 hour; Water-bed oxygen concn has improved 100 times, and (8 hours) keep this level in the experimental monitoring process; The concentration of phosphorus has reduced 60% in the water body.
Description of drawings
Fig. 1 removes the effect of algae for adopting the present invention's flocculation.
Fig. 2 is for adopting the effect of the technology of the present invention oxygenation and dephosphorization.
Fig. 3 is the implementation result that the settling original position is removed algae, oxygenation, solid phosphorus process for comprehensively treating among the embodiment 5.
Fig. 4 is the implementation result that the settling original position is removed algae, oxygenation, solid phosphorus process for comprehensively treating among the embodiment 6.
Embodiment
Give further detailed explanation below by embodiment to technology of the present invention.
The modification 1 of embodiment 1 bed mud
Employed chitosan is the technical grade chitosan that Qingdao sea hydrobiont Engineering Co., Ltd produces in the present embodiment 1, calcium peroxide (CaO
2) be the chemically pure reagent that China Medicine (Group) Shanghai Chemical Reagent Co., produces.Take by weighing the 100mg chitosan, add 1% HCl solution 10ml, treat that chitosan dissolves fully after, adding distil water is diluted to 100ml, the chitosan solution of 1mg/ml.Get chitosan solution 10ml, add 90mg clay (be properties-correcting agent: clay is 1: 9), supersound process 1min mixing, the amount with 5mg/L adds calcium peroxide powder again before adding use.
The modification 2 of embodiment 2 bed muds
Employed chitosan is the technical grade chitosan that Qingdao sea hydrobiont Engineering Co., Ltd produces in the present embodiment 2.Take by weighing the 100mg chitosan, add 1% HCl solution 10ml, treat that chitosan dissolves fully after, adding distil water is diluted to 100ml, the chitosan solution of 1mg/ml.Get chitosan solution 10ml, add 90mg clay (be properties-correcting agent: clay is 1: 9), supersound process 1min mixing, the amount with 10mg/L adds the percarbonic acid calcium powder again before adding use.
The modification 3 of embodiment 3 bed muds
Employed cm-chitosan is that Qingdao sea hydrobiont Engineering Co., Ltd produces in the present embodiment 3, SPC-D is that Zhejiang Jingke Chemical Co., Ltd produces, zeolite is the natural zeolite of Shenyang Jin Gang wollastonite mining industry company limited, through being accredited as clinoptilolite.Take by weighing the 100mg cm-chitosan, add 100ml distilled water, get the carboxymethyl chitosan sugar soln of 1mg/ml.Get carboxymethyl chitosan sugar soln 10ml, add 90mg clay (be properties-correcting agent: clay is 1: 9), supersound process 1min mixing, the amount with 10mg/L adds SPC-D and zeolite powder again before adding use.
The flocculation of embodiment 4 modification bed muds removes the embodiment 1 of algae
Get 1 modification of embodiment preparation bed mud 0.5ml mixed solution, adding 500ml, to have prepared concentration be 5 * 10
6Cell/ml, handling dissolved oxygen concentration through deoxygenation is the algae suspension of 0.1422mg/L (20 ℃), algae suspension KH
2PO
4And Na
2HPO
412H
2O solution preparation (pH 7.0), phosphorus concentration is 2.5mg/L.By the time under liquid level about 3cm place sampling and measuring frustule concentration, and calculating frustule clearance.Result such as Fig. 1 and Fig. 2 (adding dose is 0.020g/l).As seen from Figure 1, the algae clearance surpasses 80% after handling 30 minutes, and the algae clearance surpasses 97% after 240 minutes, near going algae fully.Dissolved oxygen concentration just reaches 6.0352mg/L (20 ℃) behind 10min, near the saturated oxygen concentration under this temperature and the salinity situation, and keep this level.The concentration of phosphorus drops to 0.76mg/L gradually.
Embodiment 5 settling original positions are removed the embodiment 1 of algae, oxygenation, solid phosphorus process for comprehensively treating
Delimit 2m
2The zone in, take out the bed mud settling, dephosphorization denitrogenation is pressed embodiment 1 modification after removing organism such as humic acid.Add 2L modification bed mud in using the zone.Result such as Fig. 3, behind the 4h chlorophyll a density loss 73%, behind the 8h chlorophyll a density loss 90%; Water-bed dissolved oxygen increases substantially, and water body solubility total phosphorus concentration has descended 62%.
Embodiment 6 settling original positions are removed the embodiment 2 of algae, oxygenation, solid phosphorus process for comprehensively treating
In the zone of delimiting 2m2, take out the bed mud settling, dephosphorization denitrogenation is pressed embodiment 3 modifications behind the organism such as removal humic acid.Add 2L modification bed mud in using the zone.Add 2L modification bed mud in using the zone.Result such as Fig. 4, behind the 4h chlorophyll a density loss 70%, behind the 8h chlorophyll a density loss 85%; Water-bed dissolved oxygen increases substantially, and water body solubility total phosphorus concentration has descended 45%.
Claims (9)
1. a settling original position is removed the eutrophication and the algal tufa process for comprehensively treating of algae, oxygenation, solid phosphorus, it is characterized in that the improvement that utilizes local bed mud (settling) or bank clay to be used for eutrophication and algal tufa after modification.
2. process for comprehensively treating according to claim 1 is characterized in that the bed mud or the bank clay that take out will carry out dephosphorization denitrogenation and remove treatment of organic matters of organic.
3. process for comprehensively treating according to claim 1 is characterized in that adopting a class natural polymers modification bed mud or a bank clay.
4. natural polymers according to claim 3 is characterized in that described natural polymers is one or more in chitosan and derivative, chitin and the derivative thereof.
5. process for comprehensively treating according to claim 1 is characterized in that adopting oxygenation phosphor-curing agent modification bed mud or bank clay.
6. oxygenation phosphor-curing agent according to claim 5 is characterized in that contacting to react with water emitting oxygen.
7. oxygenation phosphor-curing agent according to claim 5, it is characterized in that its metallic cation that contains can with phosphorus reaction generate water-fast, the phosphorus ore containing that chemical property is stable.
8. oxygenation phosphor-curing agent according to claim 5 is characterized in that described oxygenation phosphor-curing agent can be a kind of compound, also can be the mixture of several materials.
9. oxygenation phosphor-curing agent according to claim 5 is characterized in that described oxygenation phosphor-curing agent is the mixture of calcium peroxide, percarbonic acid calcium, Magnesium peroxide, SPC-D and zeolite and in other high oxygen containing compound one or more.
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| CN 200310113305 CN1241841C (en) | 2003-11-10 | 2003-11-10 | Technique for harnessing water bloom and bed mud secondary pollution using lake sediment |
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| CN 200310113305 CN1241841C (en) | 2003-11-10 | 2003-11-10 | Technique for harnessing water bloom and bed mud secondary pollution using lake sediment |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007028288A1 (en) * | 2005-09-05 | 2007-03-15 | Research Center For Eco-Environmental Sciences, The Chinese Academy Of Sciences | A composite for removing water bloom converted to sinking vegetation and the treatment method using thereof |
| CN102249384A (en) * | 2011-05-12 | 2011-11-23 | 泉州师范学院 | Treatment technology for small runoff and heavily-polluted river branches |
| CN102311161A (en) * | 2010-07-01 | 2012-01-11 | 中国科学院生态环境研究中心 | Method for treating red tide by using sand |
| CN103086579A (en) * | 2011-11-04 | 2013-05-08 | 郭鹏毅 | Method of treating sludge in rivers, lakes and ditches |
| CN104326619A (en) * | 2014-10-08 | 2015-02-04 | 环境保护部南京环境科学研究所 | A<2>/O process based simultaneous nitrogen and phosphorus removal and algae reduction treatment system and method |
| CN104445450A (en) * | 2014-10-30 | 2015-03-25 | 镇江山水湾生态农业开发有限公司 | Coilia ectenes aquaculture pond water regulator and preparation method thereof |
| CN105502563A (en) * | 2015-12-25 | 2016-04-20 | 广西明清环保科技有限公司 | Composite purification agent for municipal domestic wastewater |
| CN105540808A (en) * | 2016-01-18 | 2016-05-04 | 北京绿景行科技发展有限公司 | Phosphorous removal and alga control method for medium eutrophication water body |
| CN105565420A (en) * | 2015-11-27 | 2016-05-11 | 杭州萧宏环保科技股份有限公司 | Chemical for treating floating mud of river and application method of chemical |
| CN105645686A (en) * | 2016-01-25 | 2016-06-08 | 山东大学 | Method for in-situ chemical treatment and remediation of heavily-polluted black and odorous water bottom mud |
| CN108383341A (en) * | 2018-02-09 | 2018-08-10 | 广州益禄丰生态环保科技有限责任公司 | A kind of administering method of contaminated tidal reach mudcake |
| CN110642354A (en) * | 2019-08-20 | 2020-01-03 | 华南农业大学 | Chitosan composite material, preparation method and application thereof in air floatation and collection and recovery of blue-green algae |
| CN111718076A (en) * | 2020-07-03 | 2020-09-29 | 四川省内江市农业科学院 | Method for treating small water eutrophication in hilly areas |
| CN112158956A (en) * | 2020-09-07 | 2021-01-01 | 中国环境科学研究院 | Method for establishing submerged vegetation system in eutrophic water body |
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2003
- 2003-11-10 CN CN 200310113305 patent/CN1241841C/en not_active Expired - Fee Related
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| WO2007028288A1 (en) * | 2005-09-05 | 2007-03-15 | Research Center For Eco-Environmental Sciences, The Chinese Academy Of Sciences | A composite for removing water bloom converted to sinking vegetation and the treatment method using thereof |
| US7758752B2 (en) | 2005-09-05 | 2010-07-20 | Research Center For Eco-Environmental Sciences, The Chinese Academy Of Sciences | Composite material and method for removing harmful algal blooms and turning them into submerged macrophytes |
| CN1769198B (en) * | 2005-09-05 | 2012-07-11 | 中国科学院生态环境研究中心 | Method for transferring water bloom to water-bed plant using clay agglomeration |
| CN102311161A (en) * | 2010-07-01 | 2012-01-11 | 中国科学院生态环境研究中心 | Method for treating red tide by using sand |
| CN102249384A (en) * | 2011-05-12 | 2011-11-23 | 泉州师范学院 | Treatment technology for small runoff and heavily-polluted river branches |
| CN103086579A (en) * | 2011-11-04 | 2013-05-08 | 郭鹏毅 | Method of treating sludge in rivers, lakes and ditches |
| CN104326619A (en) * | 2014-10-08 | 2015-02-04 | 环境保护部南京环境科学研究所 | A<2>/O process based simultaneous nitrogen and phosphorus removal and algae reduction treatment system and method |
| CN104326619B (en) * | 2014-10-08 | 2017-05-24 | 环境保护部南京环境科学研究所 | A2/O process based simultaneous nitrogen and phosphorus removal and algae reduction treatment system and method |
| CN104445450A (en) * | 2014-10-30 | 2015-03-25 | 镇江山水湾生态农业开发有限公司 | Coilia ectenes aquaculture pond water regulator and preparation method thereof |
| CN104445450B (en) * | 2014-10-30 | 2016-08-24 | 镇江山水湾生态农业开发有限公司 | A kind of cutter long-tailed anchovy culture-pool water quality conditioning agent and preparation method thereof |
| CN105565420A (en) * | 2015-11-27 | 2016-05-11 | 杭州萧宏环保科技股份有限公司 | Chemical for treating floating mud of river and application method of chemical |
| CN105502563A (en) * | 2015-12-25 | 2016-04-20 | 广西明清环保科技有限公司 | Composite purification agent for municipal domestic wastewater |
| CN105540808A (en) * | 2016-01-18 | 2016-05-04 | 北京绿景行科技发展有限公司 | Phosphorous removal and alga control method for medium eutrophication water body |
| CN105540808B (en) * | 2016-01-18 | 2018-12-18 | 北京绿景行科技发展有限公司 | A kind of method of medium eutrophic water body dephosphorization control algae |
| CN105645686A (en) * | 2016-01-25 | 2016-06-08 | 山东大学 | Method for in-situ chemical treatment and remediation of heavily-polluted black and odorous water bottom mud |
| CN105645686B (en) * | 2016-01-25 | 2018-04-24 | 山东大学 | A kind of in-situ chemical administers the method for repairing heavily contaminated black and odorous water bed mud |
| CN108383341A (en) * | 2018-02-09 | 2018-08-10 | 广州益禄丰生态环保科技有限责任公司 | A kind of administering method of contaminated tidal reach mudcake |
| CN110642354A (en) * | 2019-08-20 | 2020-01-03 | 华南农业大学 | Chitosan composite material, preparation method and application thereof in air floatation and collection and recovery of blue-green algae |
| CN111718076A (en) * | 2020-07-03 | 2020-09-29 | 四川省内江市农业科学院 | Method for treating small water eutrophication in hilly areas |
| CN112158956A (en) * | 2020-09-07 | 2021-01-01 | 中国环境科学研究院 | Method for establishing submerged vegetation system in eutrophic water body |
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