CN205258254U - Handle composite set of pit water crowning ferro -manganese salt - Google Patents
Handle composite set of pit water crowning ferro -manganese salt Download PDFInfo
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- CN205258254U CN205258254U CN201521095384.6U CN201521095384U CN205258254U CN 205258254 U CN205258254 U CN 205258254U CN 201521095384 U CN201521095384 U CN 201521095384U CN 205258254 U CN205258254 U CN 205258254U
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Abstract
The utility model discloses a handle composite set of pit water crowning ferro -manganese salt, a handle composite set of pit water crowning ferro -manganese salt mainly comprises water oil separating district, settling zone, activated sludge - biomembrane intergrowth reaction zone and a secondary precipitation district, and it connects gradually the order for water oil separating distinguishes, settling zone, activated sludge - biomembrane intergrowth reaction zone and a secondary precipitation distinguish, activated sludge - biomembrane intergrowth reaction zone is used for biodegradable and adsorption and filtration simultaneously. A handle composite set of pit water crowning ferro -manganese salt, can be used to the integrated mine water treatment equipment of residential area, industrial and mining factory, is album that the deoiling is just sunk, microbiological treatment, denitrogenation denitration and return sludge high -efficient water treatment facilities as an organic whole. It is long that the device has solved traditional process flow, controls complicated scheduling problem.
Description
Technical field
The utility model belongs to underground water pollution treating apparatus field, is specifically related to a kind of combination unit of processing high ferrimanganic salt in mine water.
Background technology
The Identification of Water Source in Mines in the many areas of China, especially in the Identification of Water Source in Mines in the main cities of the Northeast, South China, ALFISOL IN CENTRAL and southwest and area, have iron, the manganese phenomenon that exceeds standard, physical and mental health, daily life, mining area water supply network and industrial production etc. to Residents in Mining Area all cause adverse effect. Just established " underground water deferrization and demanganization " as far back as China in the early days of foundation, autoxidation method, contact oxidation method, three developing stage of bioanalysis have successively been experienced in its theoretical and application. But that up to now, how to realize iron, manganese rapidly and efficiently removes one of FAQs being still the solution of conventional water treatment process flow process face and needs. For this reason, this patent proposes innovative technology for the removal of iron, manganese, and this has important social benefit and economic benefit.
Along with the fast development of China's economy, the underground water pollution that mankind's activity causes expands to facial contamination gradually from point pollution. Underground water especially Identification of Water Source in Mines to pollute iron in transnormal items, manganese be the common factors that causes water pollution. Iron and manganese exceed standard has nature generation and people for causing two kinds of approach. Spontaneously be mainly the pollution that primitive environment causes, have very large relation with geological structure, it pollutes general. And people is that what cause is mainly the discharge wantonly of iron content Mn-bearing waste water.
Iron, manganese are the physiology trace elements of needed by human, but the too much iron of human intake, manganese also can cause slow poisoning. Wherein the symptom of iron poisoning is that liver, spleen have a large amount of deposition of iron, and occurs cirrhosis, osteoporosis, cartilaginous calcification, skin brownish black, body of gland fibrillatable, insulin secretion minimizing etc., and then causes disturbance of carbohydrate metabolism and diabetes. The physiology toxicity of manganese is more serious than iron, and human body excess ingestion manganese can make in brain that neurotransmitter is synthetic to be reduced, and the serious nerve that will damage, when iron content in water, manganese amount are high, is understood coloured, smelly, taste. And can pollute sanitary equipment, home appliances, make it occur rust staining or sepia. When washing clothes, also can leave spot. Thereby affect people's life.
For mining area water system, fully do not removed and just directly supplied with user when iron in former water, can produce yellowish-brown, muddy running water russet. In the time that manganese content is high, there will be pitchy running water. Mining area water system is being thrown after chlorination, and in water, residual manganese is generated the black precipitate of hydrated manganese dioxide by oxychloride, and sediment deposits on the inwall of water purification facilities and defeated, the distribution system of water supply. Along with deposit is gradually many, will dwindle the cross-section of river, reduce conveyance power of water. In the time containing dissolved oxygen in water, iron content manganese containing water provides condition for iron bacteria and manganese bacteria amount reproduction, and ferrimanganic bacterium and sulfate reducing bacteria symbiosis, accelerated the corrosion of metallic conduit.
In water, excessive iron, manganese also can produce very big harm to industrial production. During as slurry or raw materials for production, can reduce the quality such as product gloss color, as particularly outstanding in Industry Effects such as weaving, printing and dyeing, knitting, papermaking. Iron in water, manganese can be bonded on fiber, produce rust spot on textile. When dyeing, iron, manganese can be combined with dyestuff, make tone not bright-coloured.
Iron, manganese also have catalytic action to the decomposition of bleaching agent, make to bleach operation difficulty occurs. In paper industry, iron, manganese in water can optionally be adsorbed between cellulose, make paper pulp its colour changed into yellow, and bleaching and Color are reduced. In brewing water, iron, manganese have peculiar smell, and can generate colored compound with some organic matter, and the quality of product look and taste is reduced. In food industry, excessive iron, the color and luster that manganese can affect product in water. In boiler feed water, iron, manganese are one of compositions generating in incrustation scale and tank mud. In cooling water, iron can be attached on heating tube wall, reduces the heat transfer coefficient of tube wall, in the time that iron-holder is high in water, even can stop up cooling water pipe. In the oil-bearing stratum flooding in oil field, iron, manganese can stop up formation pore, reduce water injection rate, reduce flood effectiveness.
In sum, iron, manganese excessive in water not only have impact to people's life, water system, industrial production, to human health be also hundred evil and none profit. Therefore in the Indicator for Drinking Water Quality of various countries, all the content of iron, manganese has been done to strict restriction. China " water environment quality standard " (GB3838-2002) in to limiting as iron, the manganese index of centralized Drinking Water surface water seedbed supplementary item: Fe < 0.3mg/L, Mn < 0.1mg/L, has also made identical regulation at " standards for drinking water quality " in (GB5749-2006).
The prior art of deironing, manganese is.
Autoxidation method
Autoxidation method comprises the series of processes such as aeration, oxidation reaction, precipitation, filtration. Wherein aeration oxygenation or add chlorine as required. The method is better to the place to go effect of iron. Iron content underground water is through aeration aerating or add after chlorine the Fe in water2+Be oxidized to Fe(OH)3Particle, because of the little Precipitation of its solubility, the Separation of Solid and Liquid cleaning procedure and removing such as after filtration. Air oxidation removes iron processes from running expense or is all of great value method to the oxidation susceptibility of iron, but Fe2+The Fe(OH of oxidized generation)3Particle is difficult to flocculation, always has part colloidal particle and penetrates filtering layer and affect effluent quality. In addition, in water, dissolubility silicic acid also can affect Fe(OH)3Flocculation, in the time that silicic acid concentration is greater than 40-50mg/L, silicic acid can react with iron and generate certain polymer substance and affect the oxidation of iron.
In the deironing of autoxidation method, manganese course of reaction, oxidation and precipitation two are crossed range request water and are stopped considerable time in reaction settling basin. This process system complexity, equipment is huge, and investment is many, and deironing, manganese effect are not satisfactory. Practice shows, this method is to be not suitable for the limited real national conditions of China's construction of water supply facilities fund.
Contact oxidation method
Contact oxidation method is the methodology that the white academician of Lee's Gui equals the Success in Experiment sixties in 20th century. This technological process is mainly directly to filter after aeration. Iron in water, manganese are oxidized to the hydroxide of high price iron, manganese in filter tank, and are attached to gradually on the surface of filtrate, form " active filter film ". The beginning of the fifties, Japan and Chinese scholar confirmed by many experiments, filter material surface formation " active filter film ', there is contact action, can greatly accelerate oxidation rate. Contact oxidation method has been applied to a lot of Practical Projects of China's underground water deferrization, manganese, and practice shows, this method is very effective for the removal of oxidizable iron.
Aspect catalytic oxidation demanganization, finding some problems. On the one hand, underground water is generally iron, manganese coexists, and the oxidizing potential of iron is lower than manganese, and iron is easy to be more oxidized than manganese, and in water, the existence of iron has interference effect to the oxidation of manganese. For getting rid of the interference of iron Quick Oxidation to manganese oxidation, contact oxidation method adopts the deironing of one-level aeration filtration, the stage division of secondary aeration filtration demanganization. Classification aeration filtration technological process complexity, operating cost is high; On the other hand, to be difficult to Quick Oxidation in filtering layer be MnO to manganese2Form " manganese matter active filter film " and be attached on filtrate, it is long that demanganization ability forms the cycle, and due to the interference of the extraneous factors such as regular backwash, " manganese matter active filter film " more difficult formation, demanganization effect presents very unsure state.
Biological oxidation process
The nineties in 20th century, an outstanding academician etc., by carrying out the field trial research of deferrization and demanganization on Shenyang official Lee fore-telling, Anshan great Zhao Tai, development zone, Fushun water factory and other places, have found biological oxidation phenomenon. By a large amount of microbiology tests, prove the efficient demanganization effect of iron bacteria in filter tank, finally establish " biological manganese fixation and removal " theory. This theory is thought, in biological demanganization filtering layer, filter material surface has generated a complicated microbial ecosystem, in this system, exist there is in a large number iron, the bacterium of manganese oxidability, the activity of demanganization filtering layer just comes from the iron of filter material surface institute set, the oxidation activity of manganese oxidizing bacteria. Within the scope of the neutral territory of pH, Mn in deferrization and demanganization filtering layer2+Oxidation be taking iron, manganese oxidizing bacteria as main biological oxidation.
Lasting for years of the research of bioanalysis deferrization and demanganization, but engineering practice is relatively less, not yet build at present perfect Theroy of Engineering Design and parameter determination method, for example not yet establish and make demanganization thickness of filter bed be difficult to calculate by theory because of biological demanganization kinetics model, can only determine by coarse empirical method or loaded down with trivial details test method; Aspect engineering practice, still lack a set of normalized operation adjustment method simultaneously, for example, when iron bacteria is accessed the filtering layer in the early stage establishment of superiority and firm process, may cause the extraneous operational factor of larger disturbance and destruction as filtering velocity, back washing strength and time etc. to filtering layer biofacies, there is no at present definite control criterion.
Medicament oxidizing process
The deironing of medicament oxidizing process, manganese are to utilize the strong oxidizing property of oxidant by deliquescent iron, manganese oxidation in water, generate iron, the manganese compound solid of high price, then by various precipitations, filter type, these iron, manganese compound are removed from water. Available oxidant has ozone, chlorine, chlorine dioxide and potassium permanganate etc.
Ozone is a kind of very strong oxidant, the ferrous iron in oxidize water rapidly, and under the condition of lower pH value and catalyst-free, can be by bivalent manganese complete oxidation. Its reaction equation is:
2Fe2++O3+5H2O--2Fe（OH）3+4H++O2
Mn2++O3+2H2O--Mn（OH）2+2H++O2
But ozone generating-device is expensive, cost is high, and ozone dosage is difficult to control, generally will with the post processing coupling such as active carbon, make technological process complexity. Ozone oxidation is generally used for the advanced treating of drinking water.
Under prior art condition, deironing, the construction cost of manganese processing and the increase of operating cost will become inevitable. Do not have at present deironing, manganese to process integrated apparatus, existing traditional handicraft, it is long that processing method has technological process, controls complexity, takes up an area greatly the shortcomings such as processing cost height.
Under prior art condition, the construction cost of removing of iron and manganese and the increase of operating cost will become inevitable. Existing removing of iron and manganese integrated apparatus all adopts traditional handicraft, and it is long that this processing method has technological process, controls complexity, takes up an area greatly the shortcomings such as processing cost height.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of combination unit of processing high ferrimanganic salt in mine water, comprises oil-water separation system 1, Chu Chen district I, biodegradation district II, secondary precipitation district III, casing 9; Described oil-water separation system 1 is communicated with by conduit Yu Chuchen district I; Described biodegradation district ⅡYu Chuchen district I is communicated with, Chu Chen district I is positioned at a side of biodegradation district II, secondary precipitation district III is positioned at biodegradation district II opposite side, and biodegradation district II is communicated with secondary precipitation district III, Chu Chen district I, biodegradation district II, secondary precipitation district III form a complete casing 9 at outer surface simultaneously.
Further, oil-water separation system 1 comprises scum pipe 1-1, water inlet pipe 1-2, oil exit pipe 1-3-3, tube connector 1-4; Described scum pipe 1-1 is positioned at a side of oil-water separation system 1, and water inlet pipe 1-2 is positioned at the top of oil-water separation system 1, and tube connector 1-4 is positioned at the opposite side of oil-water separation system 1, and tube connector 1-4 realizes oil-water separation system 1 Yu Chuchen district the two connection of I; Oil exit pipe 1-3-3 is positioned at the opposite side of oil-water separation system 1.
Further, Chu Chen district I comprises discharge pipeline 3, agitator 2, dividing plate 4, return duct 10; Described discharge pipeline 3 is positioned at the bottom of Chu Chen district I, agitator 2 is positioned at I inside, Chu Chen district, between Chu Chen district I and biodegradation district II, be provided with dividing plate 4, certain distance is left in the bottom Yu Chuchen district I of described dividing plate 4 and the bottom of biodegradation district II, and its spacing is 10cm-20cm; Chu Chen district I is communicated with the two by return duct 10 with secondary precipitation district III.
Further, biodegradation district II comprises aerator 5, combined stuffing device 6; Aerator 5 is positioned at II middle and lower part, biodegradation district, and aerator 5 comprises main admission line 5-1, air inlet lateral 5-2, jet thrust 5-3; Described main admission line 5-1 is vertical stratification, and its one end is connected with outside air pump, and its other end is communicated with air inlet lateral 5-2, and the quantity of main admission line 5-1 is 1, and the caliber of main admission line 5-1 is 10cm-20cm; Described air inlet lateral 5-2 quantity is greater than one, and multiple air inlet lateral 5-2 levels are equidistantly arranged, and the spacing of adjacent two air inlet lateral 5-2 is 20cm-50cm; On air inlet lateral 5-2, be provided with jet thrust 5-3, the quantity of jet thrust 5-3 is greater than 10, multiple jet thrust 5-3 equidistantly arrange along air inlet lateral 5-2 mono-word, the spacing of adjacent two jet thrust 5-3 is 10cm-20cm, jet thrust 5-3 caliber is 10cm-20cm, and jet thrust 5-3 is porous air blowing aluminium alloy structure.
Further, secondary precipitation district III comprises secondary sludge discharge pipe 7, outlet pipe 8; Be provided with secondary sludge discharge pipe 7 in III bottom, secondary precipitation district, in secondary precipitation district, III one side is provided with outlet pipe 8.
The disclosed a kind of combination unit of processing high ferrimanganic salt in mine water of the utility model, its advantage is.
(1) before original treatment facility, added an independently oil-water separation system 1, first mine water has been carried out separately to water-oil separating, the impurity in mine water has been carried out to preliminary sedimentation processing simultaneously.
(2) in oil-water separation system 1, be provided with collection tank, it can be according to liquid level automatic controlled height, makes its collection tank mouth keep maintaining an equal level with water surface elevation all the time, makes the wet goods suspension in mine water flow into collection tank, discharges through oil exit pipe 1-3-3.
(3) agitator 2 adopts hob type agitating mode, has accelerated the decomposition of mining area mud.
(4) aerator 5 in this system is divided into main admission line 5-1, air inlet lateral 5-2, jet thrust 5-3; This device has increased the oxygen-supplying amount to microorganism in activated sludge and biomembrane, guarantees the activity of microorganism.
A kind of combination unit of processing high ferrimanganic salt in mine water described in the utility model, can be used for the integrated mine water treatment facility in mining area, is the just efficient water treatment device of heavy, microbiological treatment, denitrogenation denitration, removing of iron and manganese of collection oil removing. It is long that this device has solved conventional process flow, controls the shortcomings such as complicated.
Brief description of the drawings
Fig. 1 is a kind of schematic perspective view of processing the combination unit of high ferrimanganic salt in mine water described in the utility model.
In above Fig. 1, oil-water separation system 1, scum pipe 1-1, water inlet pipe 1-2, oil exit pipe 1-3-3, tube connector 1-4, Chu Chen district I, discharge pipeline 3, agitator 2, dividing plate 4, return duct 10, biodegradation district II, aerator 5, main admission line 5-1, air inlet lateral 5-2, jet thrust 5-3, combined stuffing device 6, secondary precipitation district III, secondary sludge discharge pipe 7, outlet pipe 8, casing 9.
Detailed description of the invention
A kind of combination unit of processing high ferrimanganic salt in mine water the utility model being provided below in conjunction with accompanying drawing is further described.
As shown in Figure 1, be a kind of combination unit schematic perspective view of processing high ferrimanganic salt in mine water that the utility model provides. In figure, find out, this device comprises oil-water separation system 1, Chu Chen district I, biodegradation district II, secondary precipitation district III, casing 9; Described oil-water separation system 1 is communicated with by conduit Yu Chuchen district I; Described biodegradation district ⅡYu Chuchen district I is communicated with, Chu Chen district I is positioned at a side of biodegradation district II, secondary precipitation district III is positioned at biodegradation district II opposite side, and biodegradation district II is communicated with secondary precipitation district III, Chu Chen district I, biodegradation district II, secondary precipitation district III form a complete casing 9 at outer surface simultaneously.
Oil-water separation system 1 comprises scum pipe 1-1, water inlet pipe 1-2, oil exit pipe 1-3-3, tube connector 1-4; Described scum pipe 1-1 is positioned at a side of oil-water separation system 1, and water inlet pipe 1-2 is positioned at the top of oil-water separation system 1, and tube connector 1-4 is positioned at the opposite side of oil-water separation system 1, and tube connector 1-4 realizes oil-water separation system 1 Yu Chuchen district the two connection of I; Oil exit pipe 1-3-3 is positioned at the opposite side of oil-water separation system 1.
Chu Chen district I comprises discharge pipeline 3, agitator 2, dividing plate 4, return duct 10; Described discharge pipeline 3 is positioned at the bottom of Chu Chen district I, agitator 2 is positioned at I inside, Chu Chen district, between Chu Chen district I and biodegradation district II, be provided with dividing plate 4, certain distance is left in the bottom Yu Chuchen district I of described dividing plate 4 and the bottom of biodegradation district II, and its spacing is 10cm-20cm; Chu Chen district I is communicated with the two by return duct 10 with secondary precipitation district III.
Biodegradation district II comprises aerator 5, combined stuffing device 6; Aerator 5 is positioned at II middle and lower part, biodegradation district, and aerator 5 comprises main admission line 5-1, air inlet lateral 5-2, jet thrust 5-3; Described main admission line 5-1 is vertical stratification, and its one end is connected with outside air pump, and its other end is communicated with air inlet lateral 5-2, and the quantity of main admission line 5-1 is 1, and the caliber of main admission line 5-1 is 10cm-20cm; Described air inlet lateral 5-2 quantity is greater than one, and multiple air inlet lateral 5-2 levels are equidistantly arranged, and the spacing of adjacent two air inlet lateral 5-2 is 20cm-50cm; On air inlet lateral 5-2, be provided with jet thrust 5-3, the quantity of jet thrust 5-3 is greater than 10, multiple jet thrust 5-3 equidistantly arrange along air inlet lateral 5-2 mono-word, the spacing of adjacent two jet thrust 5-3 is 10cm-20cm, jet thrust 5-3 caliber is 10cm-20cm, and jet thrust 5-3 is porous air blowing aluminium alloy structure.
Secondary precipitation district III comprises secondary sludge discharge pipe 7, outlet pipe 8; Be provided with secondary sludge discharge pipe 7 in III bottom, secondary precipitation district, in secondary precipitation district, III one side is provided with outlet pipe 8.
The course of work of this equipment and the function of each parts are.
Mine water enters oil-water separation system 1, in oil-water separation system 1, be provided with collection tank, it can be according to liquid level automatic controlled height, makes its collection tank mouth keep maintaining an equal level with water surface elevation all the time, make the wet goods suspension in mine water flow into collection tank, discharge through oil exit pipe 1-3-3. Touch mine water after treatment through tube connector 1-4, enter Chu Chen district I, its agitator 2 adopts hob type to stir, promote ferrimanganic precipitation, granule foreign after precipitation is discharged through discharge pipeline 3, mine water after treatment enters biodegradation district (II), under the acting in conjunction of aerator 5 and combined stuffing device 6, remove ferrimanganic salt component in mine water, enter secondary precipitation district III, carry out sedimentation processing, water up to standard is by outlet pipe 8 qualified discharges, and below standard water enters Chu Chen district I by return duct 10 and again processes.
Claims (5)
1. process a combination unit for high ferrimanganic salt in mine water, comprise oil-water separation system (1), Chu Chen district (I), biodegradation district (II), secondary precipitation district (III), casing (9); It is characterized in that, described oil-water separation system (1) is communicated with by conduit Yu Chuchen district (I); Yu Chuchen district of described biodegradation district (II) (I) is communicated with, Chu Chen district (I) is positioned at a side in biodegradation district (II), secondary precipitation district (III) is positioned at biodegradation district (II) opposite side, and biodegradation district (II) is communicated with secondary precipitation district (III), Chu Chen district (I), biodegradation district (II), secondary precipitation district (III) form a complete casing (9) at outer surface simultaneously.
2. a kind of combination unit of processing high ferrimanganic salt in mine water according to claim 1, is characterized in that, oil-water separation system (1) comprises scum pipe (1-1), water inlet pipe (1-2), oil exit pipe (1-3-3), tube connector (1-4); Described scum pipe (1-1) is positioned at a side of oil-water separation system (1), water inlet pipe (1-2) is positioned at the top of oil-water separation system (1), tube connector (1-4) is positioned at the opposite side of oil-water separation system (1), and tube connector (1-4) is realized the two connection of oil-water separation system (1) Yu Chuchen district (I); Oil exit pipe (1-3-3) is positioned at the opposite side of oil-water separation system (1).
3. a kind of combination unit of processing high ferrimanganic salt in mine water according to claim 1, is characterized in that, Chu Chen district (I) comprises discharge pipeline (3), agitator (2), dividing plate (4), return duct (10); Described discharge pipeline (3) is positioned at the bottom of Chu Chen district (I), agitator (2) is positioned at inside, Chu Chen district (I), between Chu Chen district (I) and biodegradation district (II), be provided with dividing plate (4), certain distance is left in the Yu Chuchen district, bottom (I) of described dividing plate (4) and the bottom of biodegradation district (II), and its spacing is 10cm-20cm; Chu Chen district (I) is communicated with the two by return duct (10) with secondary precipitation district (III).
4. a kind of combination unit of processing high ferrimanganic salt in mine water according to claim 1, is characterized in that, biodegradation district (II) comprises aerator (5), combined stuffing device (6); Aerator (5) is positioned at middle and lower part, biodegradation district (II), and aerator (5) comprises main admission line (5-1), air inlet lateral (5-2), jet thrust (5-3); Described main admission line (5-1) is vertical stratification, and its one end is connected with outside air pump, and its other end is communicated with air inlet lateral (5-2), and the quantity of main admission line (5-1) is 1, and the caliber of main admission line (5-1) is 10cm-20cm; Described air inlet lateral (5-2) quantity is greater than one, and multiple air inlet laterals (5-2) level is equidistantly arranged, and the spacing of adjacent two air inlet laterals (5-2) is 20cm-50cm; On air inlet lateral (5-2), be provided with jet thrust (5-3), the quantity of jet thrust (5-3) is greater than 10, multiple jet thrusts (5-3) are equidistantly arranged along air inlet lateral (5-2) word, the spacing of adjacent two jet thrusts (5-3) is 10cm-20cm, jet thrust (5-3) caliber is 10cm-20cm, and jet thrust (5-3) is porous air blowing aluminium alloy structure.
5. a kind of combination unit of processing high ferrimanganic salt in mine water according to claim 1, is characterized in that, secondary precipitation district (III) comprises secondary sludge discharge pipe (7), outlet pipe (8); Be provided with secondary sludge discharge pipe (7) in bottom, secondary precipitation district (III), in secondary precipitation district (III), a side is provided with outlet pipe (8).
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| CN201521095384.6U CN205258254U (en) | 2015-12-28 | 2015-12-28 | Handle composite set of pit water crowning ferro -manganese salt |
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| CN201521095384.6U CN205258254U (en) | 2015-12-28 | 2015-12-28 | Handle composite set of pit water crowning ferro -manganese salt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477414A (en) * | 2022-01-17 | 2022-05-13 | 哈尔滨工业大学 | Device and method for removing iron and manganese in underground water based on self-circulation of high-concentration active manganese oxide |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114477414A (en) * | 2022-01-17 | 2022-05-13 | 哈尔滨工业大学 | Device and method for removing iron and manganese in underground water based on self-circulation of high-concentration active manganese oxide |
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Granted publication date: 20160525 Termination date: 20161228 |