CN101717172A - Method for treating underground seawater used for aquiculture - Google Patents

Method for treating underground seawater used for aquiculture Download PDF

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CN101717172A
CN101717172A CN200910199155A CN200910199155A CN101717172A CN 101717172 A CN101717172 A CN 101717172A CN 200910199155 A CN200910199155 A CN 200910199155A CN 200910199155 A CN200910199155 A CN 200910199155A CN 101717172 A CN101717172 A CN 101717172A
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water
treatment
oxygenation
filter
iron
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CN101717172B (en
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庄保陆
张业韡
倪琦
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Fishery Machinery and Instrument Research Institute of CAFS
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract

The invention belongs to a technological method for removing iron and manganese in underground seawater out of marine culture water. The method for treating underground seawater used for aquiculture comprises the following steps of: quick oxygenation treatment: carrying out oxygenation treatment by an oxygenation appliance and maintaining the pH value of a water body to be 7.0-7.8, wherein [O2] is not less than 0.40[Fe2+]; biological oxidation treatment: hanging a hairbrush-shaped three-dimensional elastic filtering material of a PE material in a corridor of a reaction pool and forming a biologic filter membrane at the surface of a filler; detention treatment: detaining an insoluble substance in the elastic filtering material by the elastic filtering material in the reaction pool; precipitation treatment: precipitating in the corridor with the average water flow rate of 10-20m/h and the oxidation time of 1.5-3h; floatation treatment: treating by a floatation device, removing the fine particles of the iron and the manganese, carrying out secondary oxygenation and separating and removing most of insoluble compounds; and sand grain filtration treatment: filtering cinder and quartz sand by a two-section type filtering material filtration pool. The invention can ensure the content of dissolved oxygen in water, maintains the balance and the stability of microorganisms in the biologic filtering material and the water quality, has lower investment and running cost and increases the benefit of a culture system.

Description

A kind of treatment process of underground seawater used for aquiculture
(1) technical field
The invention belongs to the process field of sea farming water, be specifically related to a kind of processing method of removing iron and manganese in the underground sea water.
(2) background technology
China's seawater culture fishery is flourish, but the overall difficult requirement of satisfying aquaculture of the coastal seawater quality of China, the coastal sea farming of China uses underground sea water as the breeding water water source more and more.Especially the flounder flounder class of northern China is cultured and is generally adopted the mode of beating seawater well extraction underground sea water to obtain comparatively fine breed source water.Usually, underground sea water contains iron and manganese more or less, cultures the aquatic products economic animal with the underground water that is rich in ferrimanganic, will bring great harm to culturing object.Wherein the oxidising process of divalence ferrimanganic will make water hypoxia, and the trickle insoluble particle that oxidation is separated out damages respiratory organs such as the fish cheek easily, cause culturing object death by suffocation.So underground sea water generally will increase dissolved oxygen through overregulating water temperature and pH value, after reduction salinity and removal ferrimanganic etc. is handled, can be as the aquaculture water.Northern China flounder flounder class breeding water requires iron, manganese content to be lower than 0.36mg/L and 0.50mg/L respectively.
China life drink with process water on the method for underground water deferrization manganese a lot, the practical application of deironing aspect is many with aeration oxidation process, oxychlorination method and contact percolation oxidation style.Aeration oxidation process is to utilize airborne oxygen to become ferric iron to make it to separate out oxidation of divalent, is removed through precipitation, filtration then.The oxychlorination method is an oxidisability of utilizing chlorine stronger than oxygen, and moment becomes ferric iron with oxidation of divalent in pH scope widely, then through flocculation, precipitate and remove by filter the Fe (OH) that generates in the water 3Suspended substance.The contact percolation oxidation style is to be oxygenant with the dissolved oxygen, is filtrate with the solid catalyst, to quicken the method for removing iron of oxidation of divalent.In the engineering practice there be the main demanganization method that adopts: potassium permanganate oxidation method, chlorine contact percolation method and biological manganese fixation and removal method etc.
Life drink with process water on handle iron content though to contain the phreatic method of manganese many, but need to throw in chemical reagent such as a large amount of chlorine and potassium permanganate mostly, the processing of these methods and inapplicable and aquaculture water.Chinese patent application CN200510028182.4 provides a kind of processing method and equipment of removing ferrimanganic in the underground water, it is characterized in that comprising the biological uniform filtration device of low strength spray aeration tower and one-level, can make the water outlet iron manganese content stable and meet China's Drinking Water water quality standard.But its system handles water yield is low, adopting homogeneous manganese sand is that filtrate is with high costs, filtration unit is short filtration cycle, back flushing is frequent, filtrate easily hardens and reduces processing efficiency, and its uniform filtration device relates to complicated Technologies such as " ripe filtrate transfer methodss ", is unfavorable for that grasp at the aquaculture family and use.
At present, northern China used in mariculture underground sea water removing of iron and manganese mainly adopts the method that first natural aeration, precipitation are passed through sand filtration again.Its main technique flow process is: contain the former water → natural aeration of ferrimanganic → precipitation → sand filtration, send into the fishpond.
No aeration facility in its natural aeration settling tank, aeration and oxidizing reaction required time are long, and precipitation is slowly.Sand filter uses common seabeach yellow sand as filtrate, filtration efficiency is low, and easily hardening needs the frequent artificial filtrate of changing, or select expensive and rare manganese sand for use, unreasonable present treatment process ubiquity poor processing effect, the problem that efficient is low, labour intensity is high and floor space is big of causing on technical process and facility structure design.For example, 3000m 2To be equipped with the total area usually be 1000m in the breed workshop 2Former water treatment workshop, its processing power only is about 10m 3/ h is difficult to satisfy the water demand that increases day by day, becomes the principal element of controlling plant's large-scale development.
Through investigation, retrieval, in this field, all adopt above-mentioned underground sea water deferrization and demanganization method both at home and abroad.
(3) summary of the invention
The objective of the invention is to propose the treatment process method that a kind of iron content that satisfies the aquaculture water quality requirement contains the manganese underground sea water, to solve that present underground sea water de-iron manganese efficient is low, floor space is big and problem such as labour intensity is big.
Technical problem solved by the invention can realize by the following technical solutions:
A kind of treatment process of underground seawater used for aquiculture is characterized in that: described method comprises the steps: that fast oxygenation processing → bio-oxidation handles → hold back processing → precipitation process → air supporting processing → sand grains filtration treatment;
Described fast oxygenation is handled: descend seawater to carry out oxygenation over the ground by the oxygenation utensil and handle, drive away the obnoxious flavour that comprises carbonic acid gas in the water, make water pH value maintain 7.0-7.8, [O 2] 〉=0.40[Fe 2+];
Described bio-oxidation is handled: reaction tank separates into a plurality of reciprocating type gallerys by dividing plate, is hung with the stereo-elastic filtrate of the PE material of a large amount of hairbrush shapes in the gallery, filling surface enrichment ferrimanganic bacterium and MnO 2Activeconstituents forms biological filter membrane, and the solvability oxidation of divalent iron ion in this biological filter membrane catalysis water is the process of insoluble ferric hydroxide;
Describedly hold back processing: in reaction tank, described elastic filter material is trapped in the insoluble substance that most of oxidation forms in the elastic filter material;
Described precipitation process: in reaction tank, average water flow velocity is 10-20m/h in the gallery, and oxidization time is 1.5-3h;
Described air supporting is handled: handled by air-floating apparatus, remove ferrimanganic micropartical and secondary oxygenation, separate the tetravalence manganese insoluble compound of removing most of ferric iron and having generated on a small quantity;
Described sand grains filtration treatment: adopt the two-part filter material filter pool to filter, first section filtrate is cinder, and second section filtrate is quartz sand, and the sea water filter flow velocity is 1-5m/h, the work period be 15-20d (my god).
Further, described sand grains filtration treatment two-part filter material filter pool is filtered into up and down two-layer filter material filter pool filtration.
Further again, described cinder particle diameter 0.8-2.0mm, laying depth 300-700mm, described quartz sand particle size 0.5-1.5mm, thickness 400-800mm.
Further, described fast oxygenation is handled and is made water pH value maintain 7.3-7.5, [O 2] 〉=0.63[Fe 2+].
At first carry out fast oxygenation after extracting in the underground water artesian well.One, oxygenation can be driven away obnoxious flavour such as carbonic acid gas in the water, make water pH value maintain 7.3-7.5, and high pH value helps the abundant oxidation of ferrimanganic.Its two, fast oxygenation can provide sufficient dissolved oxygen for the oxidation of ferrous iron mn ion.According to former water iron level, by calculating formula [O 2]=0.14a[Fe 2+], superfluous dissolved oxygen coefficient a gets 3, calculates Fe 2+Be oxidized to the dissolved oxygen of ferric demand.Fast oxygenation technology must guarantee that the dissolved oxygen levels after the oxygenation is calculated value [O 2] 1.0-1.5 doubly more than, i.e. [O 2] 〉=(0.40-0.63[Fe 2+]).
The ferrimanganic water inflow reaction tank that contains of bio-oxidation high-solubility oxygen carries out oxidation.Reaction tank separates into a plurality of reciprocating type gallerys by dividing plate, is hung with the 3 D elastic filler of the PE material of a large amount of hairbrush shapes in the gallery.The effect of 3 D elastic filler mainly comprises: one, filling surface be enrichment ferrimanganic bacterium and MnO very easily 2Activeconstituents and form biological filter membrane.This biological filter membrane is that the process of insoluble ferric hydroxide has good katalysis to the solvability oxidation of divalent iron ion in the water.Its two, this elastic filter material also can be trapped in the insoluble substance that most of oxidation forms in the filtrate.In addition, the significant advantage of the 3 D elastic filler of the PE material of hairbrush shape is that its hydraulic loss than other fillers is littler, and easy cleaning.Average water flow velocity is designed to 10-20m/h in the gallery of precipitin reaction pond, has guaranteed that oxidization time is at 1.5-3h.In the process of water sluggish flow in gallery, the part solid particulate will come out by precipitate and separate, cyclone reaction pond, eddy current reaction tank and the automatic reaction pond etc. of using on the present engineering, it is better and equipment simple and need not add chemical agent to be filled with the reciprocating type gallery reaction tank reaction effect of a large amount of 3 D elastic fillers, and volume is bigger, and head loss is little, construction is simple, cheap etc., water through peroxidation, hold back and post precipitation, carry out air supporting.
It mainly is to remove ferrimanganic micropartical and secondary oxygenation that the effect of air-floating apparatus is adopted in air supporting.Air supporting can be separated most of ferric iron and the tetravalence manganese insoluble compound that has generated on a small quantity, air supporting has good removal effect to the particle of particle diameter below 30 μ m, greatly reduce the iron level of water, alleviated the ferrimanganic load in the subsequent treatment process.Simultaneously, air supporting has stronger aeration oxygen replenishing ability, and rapidly the dissolved oxygen that falls of supplemental reaction consumes and dissolved oxygen levels brought up to hypersaturated state again guarantees that there is sufficient dissolved oxygen in follow-up biological demanganization deferrization filter tank.
At last, the water of process secondary oxygenation enters the sand grains filtration treatment, and the sand grains filtration treatment can be removed in the simple type filter tank in the remaining iron, and main purpose is to remove manganese.Because when ferrimanganic in the underground water coexisted, high content iron constituted serious the interference to the removal of manganese, iron and manganese are removed and are not often carried out simultaneously.Described sand grains filtration treatment two-part filter material filter pool is filtered into up and down two-layer filter material filter pool and filters, and double-bed filter upper strata filler adopts cinder, and lower floor is a quartz sand, and current enter into filtrate inside by filter material layer from coarse to fine.Filtering velocity is designed to 5m/h, and lower filtering velocity helps the abundant oxidation of manganese to be held back, and also can effectively prevent to contain on the filtrate a small amount of MnO 2The ripe biological filter membrane of activeconstituents is by wash-out.The simple type filter tank with the main difference of commonly used rapid filter is, do not select expensive and rare manganese sand for use, and select for use cheap cinder and quartz sand as filtrate, and this filter tank is not equipped with back-purge system, greatly must reduce cost and energy consumption.In addition, this filter tank has the retaining power height, and water environment capacity is big, advantages such as stable effluent quality.
Superiority of the present invention and beneficial effect: the underground sea water after this technical process is handled can guarantee that effluent quality meets the breed requirement, be in operation and guarantee oxygen in water content and keep the balance and stability of microorganism in the biofilter material for the suitable parameter of each apparatus settings, finish that aeration oxidation, biology are held back, precipitation, air supporting and filtering separation process, guarantee effluent quality.This method and apparatus can realize removing efficiently ferrimanganic under lower investment and working cost, regulate the pH value, increases functions such as dissolved oxygen, improves system processing power, increases the benefit of whole cultivating system.Process program provided by the invention combines that fast oxygenation, ferrimanganic bacterium living beings oxidizing reaction, biology are held back, precipitation, air supporting and the biological deferrization demanganization advantage of method such as filtration fast, not only floor space is less, equipment is simple, be easy to safeguard, and remove the efficient height, breeding water iron, manganese content are lower than 0.36mg/L and 0.50mg/L, and investment and working cost are cheap.
(4) description of drawings
Fig. 1 is the schema of the treatment process of underground seawater used for aquiculture of the present invention;
Fig. 2 is the treatment process of a kind of underground seawater used for aquiculture of the present invention, iron content is contained an embodiment planar configuration synoptic diagram of manganese underground sea water process method;
Fig. 3 is the treatment process of a kind of underground seawater used for aquiculture of the present invention, and the configuration that iron content is contained another embodiment side observation of manganese underground sea water process method launches synoptic diagram.
Among the figure, the 100th, the rotor mechanism of qi aeration tank of loosing, the 200th, ferrimanganic bacterium living beings reaction tank, the 300th, the broken air floatation of rotor pond, the 400th, the double-deck biological filter of ferrimanganic, the 500th, suction culvert, the 600th, clear water pipeline, the 700th, blow-off line, the 800th, row's foam line.
(5) embodiment
For making technique means of the present invention, creation characteristic, reaching purpose and effect is easy to understand,, further set forth the present invention below in conjunction with specific embodiments.
As shown in Figure 1, 2, the embodiment that a kind of treatment process according to underground seawater used for aquiculture of the present invention requires does following configuration: comprise that fast oxygenation aeration tank 100, inside are hung with ferrimanganic bacterium living beings reaction tank 200, air flotation pool 300, double-deck simple and easy sand filter 400, suction culvert 500, clear water pipeline 600, blow-off line 700 and row's foam line 800 of stereo-elastic filtrate of the PE material of hairbrush shape.
The underground sea water that is rich in iron, manganese is extracted out from deep-well by water pump, enter fast oxygenation aeration tank 100 from suction culvert 500, dissolved oxygen reaches supersaturation rapidly under oxygen-increasing device 101 effects, and oxygen-increasing device can be selected micro-pore aeration dish (pipe), microbubble generator etc. usually for use.Water after the oxygenation enters ferrimanganic bacterium living beings reaction tank 200 again.
Reaction tank 200 separates into a plurality of reciprocating type gallerys by dividing plate 201, is hung with numerous hairbrush shape PE stereo-elastic filtrates 202 in the gallery.By transplanting the cultivation of ferrimanganic bacterium and certain hour, hairbrush shape PE stereo-elastic filtrate 202 surface coverage are rich in ferrimanganic bacterium and MnO 2The ripe microbial film of activeconstituents.Usually, average water flow velocity is designed to 10-20m/h in the reaction tank, and during sluggish flow, insoluble colloidal solid bumps and adsorbs insoluble substance in reaction tank, condenses into bigger wadding grain and is attached on thread filter material surface or is deposited at the bottom of the pond.Sufficient dissolved oxygen, the three-dimensional filtrate of a large amount of hairbrush shape and slowly flow velocity, the very long residence time guarantee that oxidation of divalent has enough oxygen, and finish oxidation, hold back and precipitation process.
The water of reaction tank of flowing through enters air flotation pool 300 by perforation water distribution wall 203, be provided with air-floating apparatus 301 in the air flotation pool, air-floating apparatus can be separated with the foamy form the sedimentary trickle insoluble particle that is difficult for residual in the water from water body, insoluble microparticle is discharged from row's foam pipeline 800 with the foamy form, and air-floating apparatus can be selected typical bubble right cylinder airfloat equipment, jetting type or eddy current vane type equipment etc. for use.
The water that is rich in dissolved oxygen enters braiding channel 401 by perforation water distribution wall 302, is redistributed to two cloth tanks 402, and is evenly unrestrained to the double-deck biological filter 400 of ferrimanganic by the spination barrier on the cloth tank 402.Usually, the filtering velocity in filter tank is 1-5m/h.Upper strata, optional filter tank filtrate 403 was a cinder during engineering was used, and lower floor's filtrate 404 is a quartz sand, and the most beneath is cobble or rubble supporting layer 405.Lay the PVC perforated pipe water distribution system 406 of " rich " word shape in the supporting layer, be used to collect the clear water after the filtration.The clear water that PVC perforated pipe water distribution system 406 is collected can be entered by clear water pipeline 600 and be used for culturing after equalizing tank is regulated salinity and temperature.
The blowdown of treatment system of the present invention mainly comprises: the blowdown in the blowdown of the blowdown of fast oxygenation aeration tank 100, reaction tank 200, the blowdown of air flotation pool 300 and filter tank 400, mainly finish by blow-off line 700, the work period in filter tank of the present invention was 15-20 days, cleared up mud by the mode of periodic replacement top layer filtrate.
The overtesting checking of technology of the present invention and equipment, and carried out plant and tried out on the spot.Set up former water treatment system in the flounder flounder class plant in China somewhere according to this treatment process and carry out verification experimental verification, its major equipment comprises: underground water intake well, the rotor mechanism of qi aeration tank of loosing, biology is held back reaction tank, the broken gas air supporting of rotor machine, the double-layer filter material rapid filter, as shown in Figures 2 and 3.
The about 1.7m of fast oxygenation pool volume 3, the diffusing mechanism of qi 101 of the rotor of a 0.18kW of outfit.Former water stops 5min in the pond, dissolved oxygen reaches more than the 5.2mg/L rapidly under rotor looses mechanism of qi 101 effects.This water enters reaction tank 200 by water distribution perforated wall 102.
Reaction tank 200 cubic capacitys are about 60m 3, separate into a plurality of reciprocating type gallerys by dividing plate 201, be hung with numerous 3 D elastic fillers 202 in the gallery.Gallery always is about 50m, and average flow velocity is designed to 15m/h in the gallery, and the residence time is 2.5-3h.
The water of reaction tank passes water distribution perforated wall 203 and enters air flotation pool 300.The broken air floatation machine 301 of 0.75kW rotor is installed in the air flotation pool.Water stops about 7min altogether in air flotation pool.
The sand filter filtering velocity is designed to 5m/h, upper strata, filter tank filtrate 403 is a cinder, particle diameter 0.8-2.0mm, thickness 500mm, lower floor's filtrate 404 is a quartz sand, particle diameter 0.5-1.5mm, thickness 600mm, the most beneath is thick cobble of 200mm or rubble supporting layer 405, lays the PVC perforated pipe water distribution system 406 of " rich " word shape in the supporting layer.
Dirt eliminating function is mainly finished by blow-off line 700, comprising: aeration tank wash water valve 701, reaction tank wash water valve 702, air flotation pool wash water valve 703.
Behind about 2 months of the system stable operation, it is 20m that flow system flow is set respectively 3/ h, 30m 3/ h, 40m 3/ h, regularly get former water and water outlet water sample detection each continuous 10 day every day under every kind of flow.Adopt the portable multi-parameter detector of YSI556 type to survey dissolved oxygen, temperature and salinity.Survey iron, manganese content respectively with phenanthroline spectrophotometry and formoxime spectrophotometry.The former former water treatment system that has a cover according to " method that first natural aeration, precipitation are passed through sand filtration again " foundation of this plant detects its treatment effect with above-mentioned same procedure.The result is as shown in table 2.15.1 ℃-15.8 ℃ of the underground sea water water temperatures that plant's deep-well is extracted out, salinity is 49 ‰-56 ‰, iron 1.88-2.00mg/L, manganese 0.72-0.87mg/L.As shown in Table 2, when flow system flow be designing treatment amount 20m 3During/h, the iron of water outlet, manganese content average drop to 0.21mg/L and 0.22mg/L respectively, and dissolved oxygen reaches more than the 5.25mg/L, and iron, manganese clearance are respectively 88.89% and 71.79%.Even at flow system flow is 40m 3Under the situation of/h overload operation, the iron of water outlet, manganese content average drop to 0.34mg/L and 0.31mg/L respectively, and iron, manganese clearance have reached 82.38% and 61.25% respectively, satisfy the aquaculture water quality requirement fully.This shows, though the system that sets up according to this technology under the situation of overload operation, treatment effect is still far above the existing treatment system of plant.
Table 1 is according to the processing parameter of the underground sea water de-iron manganese-Application Example of technical process of the present invention and processing requirement design
Table 1
Project Desired value
Designing treatment ability (m 3/h) ??20
Floor space (the m of system 2) ??90.6
The reaction tank residence time (h) ??3
Fast oxygenation device current consumption (kWh/d) ??4.32
Air-floating apparatus current consumption (kWh/d) ??4.32
The total power consumption of system (kWh/d) ??8.62
Former water iron manganese content (mg/L) Iron 1.88-2.00, manganese 0.72-0.87
Water outlet iron manganese content (mg/L) Iron<0.25, manganese<0.25
Water outlet dissolved oxygen content (mg/L) ??>5.20
The comparative analysis of newly-built instance system of table 2 and original system treatment effect
Table 2
Project Treatment capacity (m 3/L) Former water DO (mg/L) The total iron of former water (mg/L) The total manganese of former water (mg/L) Water outlet DO (mg/L) The total iron of water outlet (mg/L) The total manganese of water outlet (mg/L) Total iron clearance (%) Total manganese clearance (%)
Existing system ??20 ??2.15 ??1.90 ??0.77 ??5.15 ??0.71 ??0.61 ??62.63 ??20.78
Newly-built system 1 ??20 ??2.26 ??1.89 ??0.78 ??5.25 ??0.21 ??0.22 ??88.89 ??71.79
Newly-built system 2 ??30 ??2.03 ??1.88 ??0.75 ??5.11 ??0.28 ??0.25 ??85.11 ??66.67
Newly-built system 3 ??40 ??2.12 ??1.93 ??0.80 ??5.03 ??0.34 ??0.31 ??82.38 ??61.25
Annotate: think that former water DO value is that pump handle water has been brought the part air into and caused from the process of underground extraction.
Embodiment according to technical scheme of the present invention, technical requirements design, tissue, adopted the upper limit, lower limit and intermediate value in the technical qualification scope to test respectively, from above testing data as seen, all have clear improvement and improve than the total iron clearance of prior art result (%), total every index of manganese clearance (%).

Claims (4)

1. the treatment process of a underground seawater used for aquiculture is characterized in that: described method comprises the steps: that fast oxygenation processing → bio-oxidation handles → hold back processing → precipitation process → air supporting processing → sand grains filtration treatment;
Described fast oxygenation is handled: descend seawater to carry out oxygenation over the ground by the oxygenation utensil and handle, drive away the obnoxious flavour that comprises carbonic acid gas in the water, make water pH value maintain 7.0-7.8, [O 2] 〉=0.40[Fe 2+];
Described bio-oxidation is handled: reaction tank separates into a plurality of reciprocating type gallerys by dividing plate, is hung with the stereo-elastic filtrate of the PE material of a large amount of hairbrush shapes in the gallery, filling surface enrichment ferrimanganic bacterium and MnO 2Activeconstituents forms biological filter membrane, and the solvability oxidation of divalent iron ion in this biological filter membrane catalysis water is the process of insoluble ferric hydroxide;
Describedly hold back processing: in reaction tank, described elastic filter material is trapped in the insoluble substance that most of oxidation forms in the elastic filter material;
Described precipitation process: in reaction tank, average water flow velocity is 10-20m/h in the gallery, and oxidization time is 1.5-3h;
Described air supporting is handled: handled by air-floating apparatus, remove ferrimanganic micropartical and secondary oxygenation, separate the tetravalence manganese insoluble compound of removing most of ferric iron and having generated on a small quantity;
Described sand grains filtration treatment: adopt the two-part filter material filter pool to filter, first section filtrate is cinder, and second section filtrate is quartz sand, and the sea water filter flow velocity is 1-5m/h, and the work period is 15-20d.
2. according to the treatment process of the described underground sea water of claim 1, it is characterized in that described sand grains filtration treatment two-part filter material filter pool is filtered into up and down two-layer filter material filter pool and filters.
3. according to the treatment process of the described underground sea water of claim 2, it is characterized in that described cinder particle diameter 0.8-2.0mm, laying depth 300-700mm, described quartz sand particle size 0.5-1.5mm, thickness 400-800mm.
4. according to the treatment process of the described underground sea water of claim 1, it is characterized in that described fast oxygenation processing makes water pH value maintain 7.3-7.5, [O 2] 〉=0.63[Fe 2+].
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Publication number Priority date Publication date Assignee Title
CN102265801A (en) * 2011-06-23 2011-12-07 中国水产科学研究院渔业机械仪器研究所 Suspended sand filter for seawater aquiculture water treatment
CN102265801B (en) * 2011-06-23 2012-10-24 中国水产科学研究院渔业机械仪器研究所 Suspended sand filter for seawater aquiculture water treatment
CN102515444A (en) * 2011-12-29 2012-06-27 江苏久吾高科技股份有限公司 Recirculating aquaculture water treatment system and method
CN102893941A (en) * 2012-10-29 2013-01-30 中国水产科学研究院渔业机械仪器研究所 Self-purifying-type small circulating pool system for germ plasma resource protection
CN102893941B (en) * 2012-10-29 2014-07-16 中国水产科学研究院渔业机械仪器研究所 Self-purifying-type small circulating pool system for germ plasma resource protection

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