CN102616990B - Method for processing algae-enriching water and application system thereof - Google Patents
Method for processing algae-enriching water and application system thereof Download PDFInfo
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- CN102616990B CN102616990B CN201210082766XA CN201210082766A CN102616990B CN 102616990 B CN102616990 B CN 102616990B CN 201210082766X A CN201210082766X A CN 201210082766XA CN 201210082766 A CN201210082766 A CN 201210082766A CN 102616990 B CN102616990 B CN 102616990B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a method for processing algae-enriching water. The method comprises the following steps of: a) obtaining algae liquid after thoroughly decomposing and hydrolyzing; b) carrying out anaerobic digestion on the algae liquid; c) carrying out anaerobic-aerobic processing on the algae liquid after the anaerobic digestion; and d) discharging the algae liquid subjected to the anaerobic-aerobic processing after nitrogen and phosphorus are absorbed by water plant. The invention also relates to an application system of the method for processing the algae-enriching water. According to the method and the system which are disclosed by the invention, the difficult problem of processing a large amount of cyanobacteria bloom in Lake Taihu can be effectively solved, organic pollutants and nitrogen and phosphorus nutrients in the algae-enriching water can be effectively removed, the purposes of biogas production by blue green algae organic biomass and the agriculture resource utilization of the nitrogen and the phosphorus can be realized while the lake water quality is directly improved, and the processed tail water can reach to a level A emission standard related to the national standard. Compared with the regular algae-enriching water gas floatation thickening method, the method disclosed by the invention has the advantages of having a good removing effect, being simple in operation and management and good in energy saving effect, greatly reducing the processing cost of the blue green algae, and having excellent social benefit and economic benefit.
Description
Technical field
The invention belongs to the treatment process of lake pollution, relate in particular to treatment process and the application system thereof of the algae in the lake.
Background technology
Removing algae in the part of bloom blue algae bulk deposition is a kind of requisite means, the timely salvaging of blue-green algae can reduce in a short time blue alga biomass with collection, reduce endogenous water body nitrogen, phosphorus and algae content of toxins, and can accelerate water ecology and recover, be considered to a kind of method safely and effectively.At present, the salvaging of blue-green algae mainly contain fixed algae moisture leaving from station with drag for algae ship dual mode, investigation result shows, the Taihu Lake periphery has more than 70 blue-green algae salvaging point at present, 8 fixed algae moisture are leaving from station, because algae moisture is limit from ability, from concentration, and remaining major part can only be deposited in pond or hollow part around Taihu Lake to 50% the algae of only having an appointment when blue-green algae is salvaged the peak through algae moisture.Along with accumulated time, the algae of accumulation becomes old algae, not only makes water quality deterioration, the rotten smelly water body surrounding enviroment that affect, and the release of algae toxin can occur; The nitrogen that decompose to produce, phosphorus, algae toxin also can be because of rain drop erosiones, again flow into Taihu Lake by rainwash or leaching, cause secondary pollution.This not only can not fundamentally solve Taihu Lake algae problem, has caused especially the pollution of Taihu Lake bank base due to blue-green algae accumulation on the coast, has brought great impact for local water surrounding and Air quality, has aggravated the deterioration of TAI HU AREA quality of water environment.
At present blue-green algae commonly used is salvaged with processing mode and is artificial salvaging, drags for algae after the algae ship is salvaged and carry out the concentrated and filter-press dehydration of air supporting, and this way has the problem of economy and technological rationality.The algae processing cost is higher, press filtration is processed disposal process and is difficult to avoid running off part nitrogen phosphorus, processes perfect not.
Summary of the invention
The object of the present invention is to provide that a kind of simple, environmental protection, cost are low, the combined treatment technological method of the algae that takes full advantage of resource.
Concrete technical scheme of the present invention is as follows:
A kind for the treatment of process of algae comprises the steps:
A) algae blue algae liquid of obtaining the frustule broken wall, becoming thoroughly decomposed after the hydrolysis of becoming thoroughly decomposed;
B) the algae liquid anaerobic digestion that step a) is obtained;
C) the algae liquid after anaerobic digestion being carried out anaerobic-aerobic processes;
D) the algae liquid after anaerobic-aerobic is processed is discharged after waterplant absorbed nitrogen, phosphorus.
Become thoroughly decomposed in a) time of hydrolysis of step is 7-10 days.
In step b), the time of anaerobic digestion is 5-7 days, and temperature is 35-38 ℃.
In step c), the anaerobic-aerobic treatment time is 15-20h.
When in step c), anaerobic-aerobic is processed, the oxygen concn of aerobic section is 1.0 ~ 2.0mg/L.
Above-mentioned waterplant is aquatic vegetable.
The invention still further relates to a kind of system that realizes above-mentioned algae treatment process, comprise the hydrolytic tank that becomes thoroughly decomposed, the anaerobic digestion reaction vessel that is connected with the hydrolytic tank that becomes thoroughly decomposed, the Anoxic/Aerobic reactor that is connected with anaerobic digestion reaction vessel, the aquatic vegetable artificial swamp that is connected with the Anoxic/Aerobic reactor.
Above-mentioned Anoxic/Aerobic reactor is A/O oxidation ditch or Anoxic/Aerobic biological contact chamber.
Above-mentioned aquatic vegetable artificial swamp load is 0.1 ~ 0.2 m
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1Can guarantee that according to this low load condition operation effluent quality reaches first discharge standard.
Algae enters the hydrolytic tank that becomes thoroughly decomposed, and the effect by facultative microbe in the hydrolytic tank that becomes thoroughly decomposed improves the biodegradability of algae to the complicated organic substance decomposing in algae, has improved the treatment effect of subsequent disposal structures; Algae enters anaerobic digestion reaction vessel and can be used for generating through the biogas of anaerobic digestion generation, and the algae liquid COD clearance after anaerobic digestion reaches more than 70%; Algae liquid after anaerobic digestion is discharged after Anoxic/Aerobic reactor anaerobic-aerobic is processed by the waterplant absorbed nitrogen phosphorus in the aquatic vegetable artificial swamp.The aquatic vegetable artificial swamp in the Taihu Lake basin scope, is planted mater convolvulus etc. according to the different waterplant of seasonal variation seed selection per April, and the harvesting cycle is 15 ~ 20 days, is changed to by the end of September the overwintering plants such as Chinese celery, and the harvesting cycle is 45 ~ 60 days; Aquatic vegetable in the aquatic vegetable artificial swamp continues to remove organism and the nutritive salt such as nitrogen, phosphorus in water, realize the recycling of nitrogen phosphorus, by the results plant, with nutritive salt band water-outlet body such as Water, phosphorus, reach the purpose of evolution water, guarantee that artificial wetland effluent water quality reaches the tail water emission request of " urban wastewater treatment firm pollutent comprehensive discharge standard (GB18918-2002) " one-level A standard code.
The present invention's algae is become thoroughly decomposed multiple technologies optimum combinations such as hydrolysis, anaerobic digestion, Anoxic/Aerobic processing, waterplant absorbed nitrogen phosphorus, can effectively solve the processing disposal difficulties of the algae of the extensive blue-green algae salvaging in Taihu Lake, effectively remove algae organic pollutant and nitrogen and phosphorous nutrient, in the target of directly improving the lake water Water quality, realize the purpose that blue-green algae organic-biological matter product biogas, nitrogen phosphorus agricultural resources utilize; After processing, tail water can reach the first discharge standard of relevant national standard.Compare with conventional algae air supporting concentration method, not only removal effect is better, and operational management is simple, good energy-conserving effect, especially decrease the processing cost of blue-green algae, have good social benefit and economic benefit.
Description of drawings
Fig. 1 is process flow sheet of the present invention;
Fig. 2 is system architecture schematic diagram used in the present invention;
Fig. 3 is aquatic vegetable artificial swamp structural representation.
Embodiment
" algae " of the present invention adopts the Taihu Lake blue-green algae to salvage " algae " that obtains.
Further illustrate the present invention below in conjunction with accompanying drawing.
Participate in Fig. 1 and Fig. 2, blue-green algae is salvaged point or drag for algae that the algae ship salvages and introduce in the hydrolytic tank that becomes thoroughly decomposed and to obtain the algae liquid that broken wall becomes thoroughly decomposed in standing 7-10 days; The algae liquid that obtains was introduced under the condition that maintains the temperature at 35-38 ℃ in anaerobic digestion reaction vessel mesophilic anaerobic digestion 5-7 days, the biogas that anaerobic digestion produces can be used for generating; Algae liquid after anaerobic digestion enters anaerobic-aerobic processing 15-20h in the Anoxic/Aerobic reactor, the oxygen concn of aerobic section is 1.0 ~ 2.0mg/L, algae liquid after anaerobic-aerobic is processed enters the discharge up to standard after waterplant absorbed nitrogen, phosphorus of aquatic vegetable artificial swamp, and aquatic vegetable artificial swamp load is 0.1 ~ 0.2 m
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Hydrolytic tank becomes thoroughly decomposed
Hollow, pool that the structure of hydrolytic tank of becoming thoroughly decomposed relies on nature to exist, perhaps utilize drag for the algae station near existing Chen Zaochi transform the hydrolytic tank that becomes thoroughly decomposed as.The hydrolytic tank bank base that becomes thoroughly decomposed adopts hard bank base, and it is 2 ~ 3 that the hydrolytic tank that becomes thoroughly decomposed arranges number, and the depth of water should be designed to the gallery push flowing at 2-4 rice, and one after the other is used.The hydrolytic tank hydraulic detention time that becomes thoroughly decomposed is about 7-10 days, can effectively be hydrolyzed complicated organism, removes most of algae toxin.
Anaerobic digestion reaction vessel
Adopt existing UASB reactor, this reactor is carried out the bottom water inlet.Reactor top arranges gas-solid-liquid triphase separator, mud or granule sludge that settling property is good precipitation separation device, auxiliary de-gassing vessel and sludge reflux equipment have been avoided setting up, reactor moves continuously, forms the hydraulics of local circulation in reactor.Because the density ratio artificial carrier of granule sludge is little, can lean on the gas that produces in reactor to realize fully contacting of mud and matrix, strengthened mass transfer process, will improve algae product methane speed and efficient.Marsh gas collector is set, recycles producing biogas, can select suitable generator to utilize marsh gas power generation according to practical situation, utilize generator waste heat or biogas heating anaerobic digestion reaction vessel.The UASB reactor waterpower residence time is 5-7 days, highly should adopt skeleton construction or enamel assembling type at 8 ~ 10m, and circular configuration or square structure all can.Becoming thoroughly decomposed, COD is when 5000-7000mg/L when entering anaerobic digestion reaction vessel for algae liquid after hydrolysis, and the algae liquid COD after anaerobic digestion is not more than 1500mg/L.
The Anoxic/Aerobic reactor
The major function that anaerobic-aerobic is processed is organism, part total nitrogen and a small amount of phosphorus of removing in water, makes water become clear, guarantees the normal operation of follow-up aquatic vegetable artificial swamp.The present invention should adopt existing A/O type oxidation ditch or Anoxic/Aerobic biological contact chamber as reactor, hydraulic detention time oxidation ditch 20h, Anoxic/Aerobic biological contact chamber contact-oxidation pool 15h left and right, in oxidation ditch aerobic section or catalytic oxidation Aerobic Pond, dissolved oxygen concentration should be controlled at 1.0 ~ 2.0mg/L.
The aquatic vegetable artificial swamp
The aquatic vegetable artificial swamp adopts existing aquatic vegetable artificial swamp, and concrete structure is referring to Fig. 3, and the average hydraulic load of aquatic vegetable artificial swamp is 0.1 ~ 0.2 m
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1Aquatic vegetable artificial swamp surrounding masonry concrete constructions, partition wall is selected brickwork construction, any matrix is not filled in inside, head end is water inlet distributing flue 2, end is water outlet braiding channel 4, and the middle part is the plant growing district, and the plant growing district is comprised of sink unit 3, sink unit 3 is the rectangular shallow pond, length and width, deeply is respectively 15m, 1.0m and 0.3m.Plant growing is divided into A level, B level, C level and is adopted the form of three grades of series connection, and at the bottom of the inter-stage pond, the absolute altitude Parallel to the flow direction reduces 15cm step by step; Every grade is separated into again 32 sink unit.Algae liquid after anaerobic-aerobic is processed is promoted to distributing flue 2 through impeller pump 1, then enters each sink unit through pvc pipe in the run by gravity mode, and water outlet is collected to the rear discharging of braiding channel 4, and in Fig. 3, arrow is depicted as water (flow) direction.The aquatic vegetable artificial swamp is according to the different waterplant of seasonal variation seed selection, and in the Taihu Lake basin scope, plant annual April such as mater convolvulus etc., and the harvesting cycle is 15 ~ 20 days; Be changed to by the end of September the overwintering plants such as Chinese celery, the harvesting cycle is 45 ~ 60 days.In the water that the aquatic vegetable artificial swamp is discharged: COD is less than 50mg/L, and TN is less than 15 mg/L, and TP can reach the first discharge standard of relevant national standard less than 0.5 mg/L.
Claims (5)
1. the treatment process of an algae, is characterized in that comprising the steps:
A) algae obtains algae liquid after the hydrolysis of becoming thoroughly decomposed;
B) the algae liquid anaerobic digestion methane production that step a) is obtained, the time of anaerobic digestion is 5-7 days, temperature is 35-38 ℃;
C) the algae liquid after anaerobic digestion is carried out anaerobic-aerobic and process, the treatment time is 15-20h, and when anaerobic-aerobic is processed, the oxygen concn of aerobic section is 1.0 ~ 2.0mg/L;
D) the algae liquid after anaerobic-aerobic is processed is discharged after aquatic vegetable absorbed nitrogen, phosphorus.
2. the treatment process of algae according to claim 1, the time of the hydrolysis that it is characterized in that becoming thoroughly decomposed during step a) is 7-10 days.
3. system that realizes the described algae treatment process of above-mentioned arbitrary claim is characterized in that comprising the aquatic vegetable artificial swamp that becomes thoroughly decomposed hydrolytic tank, the anaerobic digestion reaction vessel that is connected with the hydrolytic tank that becomes thoroughly decomposed, the Anoxic/Aerobic reactor that is connected with anaerobic digestion reaction vessel, is connected with the Anoxic/Aerobic reactor.
4. the system that realizes the algae treatment process according to claim 3, is characterized in that described Anoxic/Aerobic reactor is A/O oxidation ditch or Anoxic/Aerobic biological contact chamber.
5. the system that realizes the algae treatment process according to claim 4, is characterized in that described aquatic vegetable artificial swamp load is 0.1 ~ 0.2 m
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210082766XA CN102616990B (en) | 2012-03-27 | 2012-03-27 | Method for processing algae-enriching water and application system thereof |
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| CN201210082766XA CN102616990B (en) | 2012-03-27 | 2012-03-27 | Method for processing algae-enriching water and application system thereof |
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| CN102616990B true CN102616990B (en) | 2013-11-06 |
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| CN103359893B (en) * | 2013-08-06 | 2015-02-18 | 山东建筑大学 | A sewage treatment and reclaimed-water reuse coupled system for landscape energy-efficient residential areas |
| CN107986564A (en) * | 2017-12-11 | 2018-05-04 | 无锡蓝湾资源再生科技有限公司 | The processing unit of algae water tail water |
| CN108676710B (en) * | 2018-06-29 | 2023-12-08 | 中国科学院南京地理与湖泊研究所 | Method and device for simulating influence of blue algae decomposition on generation and release of greenhouse gases |
| CN109160694A (en) * | 2018-10-17 | 2019-01-08 | 福建光宇环保科技有限公司 | A kind of method of a variety of pollution factor integrated treatments in water hyacinth squeezing juice |
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