CN103420491B - Simultaneous iron, manganese, ammonia nitrogen and turbidity removing method based on biological iron and manganese removing process - Google Patents
Simultaneous iron, manganese, ammonia nitrogen and turbidity removing method based on biological iron and manganese removing process Download PDFInfo
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Abstract
The invention discloses a simultaneous iron, manganese, ammonia nitrogen and turbidity removing method based on a biological iron and manganese removing process, relates to underground water processing methods, and solves the technical problem that the existing biological iron and manganese removing processes are high in discharged water turbidity. The method includes the steps of firstly, assembling a two-stage reactor system which comprises a primary filter column, a secondary filter column, an adjusting water tank, an intermediate water tank, a first submersible pump, a second submersible pump, a first back washing pipe and a second back washing pipe; secondly cultivating filter columns; thirdly, processing underground water when filter speed of the primary filter column is 4-8m/h and the filter speed of the secondary filter column is 6-12m/h. By the two-stage method applicable to underground water processing, iron, manganese and ammonia nitrogen in the discharged water are respectively lowered to below 0.2mg/L, 0.05mg/L and 0.1mg/L, and turbidity of the discharged water is lowered to below 0.5NTU which is lower than the drinking water standards of China.
Description
Technical field
The invention belongs to groundwater treatment field, be specifically related to the method that underground water based on biological deferrization demanganization technique is removed ferrimanganic ammonia nitrogen turbidity simultaneously.
Background technology
Quality of groundwater is stable, is not vulnerable to pollute, and be the good tap water of people and desirable industrial water source.But in some regional underground water, usually contain iron, manganese, and ammonia nitrogen, having had a strong impact on its use value, therefore must be removed.Biological deferrization demanganization technique, because of advantages such as its technical process are simple, treatment effect is good, operation conditions is stable, floor space is little, investment cost is few, has obtained application in a plurality of iron content of China containing manganese underground water factory site.Yet in biological deferrization demanganization process, the ferrous iron in underground water is oxidized to ferric oxide by chemical oxidation or iron bacteria, is attached on filtrate or by filtrate and tackles; Bivalent manganese is oxidized to Manganse Dioxide by manganese oxidation bacterium, and is attached on filtrate.Back flushing can only rinse out the Mn oxide of most ferriferous oxide and small portion from filtrate; Along with the operation in filter tank, the iron and manganese oxides being attached on filtrate increases gradually, and particle diameter of filter medium increases gradually.The removal of turbidity mainly relies on the interception of filtrate, especially less upper, the middle level filtrate of particle diameter; And go up, main removal filtering layer that middle level filtrate is ferrimanganic, particle size growth is very fast, thus biological demanganization water factory after operation for some time turbidity have rising in various degree.
Biological deferrization demanganization technique has good removal effect to ferrimanganic, but after moving for some time, delivery turbidity has rising in various degree.Turbidity in the new drinking water standard of China has dropped to 1NTU by original 3NTU.Therefore, the turbidity removal of biological deferrization demanganization water factory becomes problem demanding prompt solution, there is no at present biological deferrization demanganization technique and when effectively removing removing of iron and manganese ammonia nitrogen, removes the report of turbidity aspect.
Summary of the invention
The present invention will solve the technical problem that the delivery turbidity of existing biological deferrization demanganization technology is high, and a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time is provided.
The method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time of the present invention is carried out according to the following steps:
One, assembling second reactor system:
Second reactor system is by first-level filtering post, secondary filter post, and regulating tank, intermediate water tank, the first submersible pump, the second submersible pump, the first backwash tube and the second backwash tube form;
Wherein first-level filtering post is comprised of one-level cylinder, the first supporting layer, the one-level manganese sand filtration bed of material and one-level mixing tank, one-level mixing tank is arranged on the top in one-level cylinder, the first supporting layer is arranged on the bottom in one-level cylinder, on the first supporting layer, be provided with the one-level manganese sand filtration bed of material, the one-level manganese sand filtration bed of material divides two-layer up and down, upper thickness is 0.6m～0.7m, the particle diameter of manganese sand filtering material is 2～2.5mm, and in the filter material layer of upper strata, has the filter material surface length of the filter material layer that 30～40cm is thick to have iron-oxidizing bacteria, manganese oxidation bacterium and nitrifier; Lower thickness is 0.6m～0.7m, and the particle diameter of manganese sand filtering material is 2.5～3mm; The water-in that is arranged on one-level cylinder top is communicated with mixing tank, and the one-level water outlet that is arranged on one-level cylinder bottom is connected with intermediate water tank, and the first backwash tube is communicated with one-level water outlet simultaneously; One-level thief hole is set on the sidewall of one-level cylinder, and the first submersible pump is arranged in regulating tank, and the water outlet of the first submersible pump is communicated with one-level water-in;
Secondary filter post is comprised of secondary cylinder, the second supporting layer, the secondary manganese sand filtration bed of material and secondary mixer, secondary mixer is arranged on the top in secondary cylinder, the second supporting layer is arranged on the bottom in secondary cylinder, on the second supporting layer, be provided with the secondary manganese sand filtration bed of material, the thickness of the secondary manganese sand filtration bed of material is 1m～1.2m, the particle diameter of manganese sand filtering material is 0.5～1.0mm, the secondary water-in that is arranged on secondary cylinder top is communicated with secondary mixer, be arranged on the secondary effluent mouth of secondary cylinder bottom, the second backwash tube is communicated with secondary effluent mouth simultaneously; Secondary thief hole is set on the sidewall of secondary cylinder, and the second submersible pump is arranged in intermediate water tank, and the water outlet of the second submersible pump is communicated with secondary water-in;
Two, filter post is cultivated:
To after underground water aeration, pass into regulating tank 3, the pH of the water in regulating tank is 7～7.1, and dissolved oxygen concentration is greater than 8mg/L, 7.5～8.5 ℃ of water temperatures; Through the first submersible pump, pump in first-level filtering post again, under the condition that is 3.5～4m/h in first-level filtering post filtering velocity, one-level water outlet is injected to intermediate water tank, one-level water outlet pumps in secondary filter post through the second submersible pump again, water outlet under the condition that is 5.5～6m/h in secondary filter post filtering velocity, move altogether 30～40 days, filter post is cultivated ripe; After first-level filtering post operation 48h, adopt and through the first backwash tube, pass into water and carry out back flushing, back washing strength 12～14L/ (sm
2), backwashing time 6～7min adopts through the second backwash tube, to pass into water and carry out back flushing after secondary filter post operation 96～144h, and back washing strength is 12～14L/ (sm
2), backwashing time 2～3min;
Three, groundwater treatment:
To after underground water aeration, pass in regulating tank, the pH of the water in regulating tank is 7～7.1, and dissolved oxygen concentration is greater than 8mg/L, 7.5～8.5 ℃ of water temperatures; Through the first submersible pump, pump in first-level filtering post again, under the condition that is 4～8m/h in first-level filtering post filtering velocity, one-level water outlet is injected to intermediate water tank, one-level water outlet pumps in secondary filter post through the second submersible pump again, and water outlet under the condition that is 6～12m/h in secondary filter post filtering velocity, completes the processing of underground water; After first-level filtering post operation 16～24h, adopt and through the first backwash tube, pass into water and carry out back flushing, back washing strength 18～19L/ (sm
2), backwashing time 6～10min adopts through the second backwash tube, to pass into water and carry out back flushing after secondary filter post operation 96～144h, and back washing strength is 12～14L/ (sm
2), backwashing time 2～3min.
The present invention is a kind of method that two-stage is synchronously removed iron, manganese, ammonia nitrogen and turbidity, when in underground water, concentration of iron is higher, if adopt the small particle size filtrate of particle diameter≤1mm, although can effectively reduce the turbidity in water outlet, filtrate easily stops up, must adopt lower filtering velocity as 2～3m/h, and filtrate easily runs off with backwashing water when back flushing, therefore can only adopt less back washing strength, so part iron and manganese oxides is difficult for being backwashed, causes like this particle diameter of filter medium to increase very fast; If adopt the filtrate of the greater particle size of particle diameter >=2mm, can reduce obstruction, but poor to other impurity interception result in iron and manganese oxides and water inlet, delivery turbidity exceeds standard.In method of the present invention, first-level filtering post adopts the filtrate of greater particle size, on filtrate, adhere to a large amount of iron, manganese oxidation bacterium and nitrifier, can remove to greatest extent the ferrimanganic ammonia nitrogen in water inlet, while processing the high underground water of concentration of iron, be difficult for stopping up simultaneously, and can adopt larger back washing strength for the filtrate of greater particle size, thereby the iron and manganese oxides that are attached on filtrate are backwashed more, particle diameter of filter medium rate of growth is slack-off, be conducive to the removal of turbidity, can also delay to change the cycle of filtrate, save cost simultaneously; Ferrimanganic concentration in the water outlet of first-level filtering post is all very low, iron, manganese concentration are respectively lower than 0.5mg/L, 0.1mg/L, secondary filter post only need be removed a small amount of iron, manganese, ammonia nitrogen, turbidity, particle diameter of filter medium in secondary filter post is little, when further reducing ferrimanganic ammonia nitrogen concentration, can effectively reduce delivery turbidity, filtrate rate of growth in the post of secondary filter is simultaneously very slow, and the replacement cycle of filtrate is also very long.Although the present invention's bi-level treatment, but filtering velocity is high, processing power does not reduce, improve on the contrary, the iron in water outlet of the present invention, manganese, ammonia nitrogen drop to respectively 0.2mg/L, 0.05mg/L, below 0.1mg/L, the turbidity of water outlet is simultaneously down to below 0.5NTU, realized the two-stage of ferrimanganic ammonia nitrogen turbidity in underground water and efficiently removed, four indices, all far below national drinking water standard, is conducive to practical engineering application.
Accompanying drawing explanation
Fig. 1 is second reactor system schematic in embodiment one; In figure, 1 is that first-level filtering post, 2 is secondary filter post, and 3 is that regulating tank, 4 is that intermediate water tank, 5 is that the first submersible pump, 6 is that the second submersible pump, 7 is that the first backwash tube, 8 is the second backwash tube;
Fig. 2 is the first-level filtering post schematic diagram of second reactor system in embodiment one; Wherein 1-1 is that one-level cylinder, 1-2 are that the first supporting layer, 1-3 are that the one-level manganese sand filtration bed of material, 1-4 are that one-level mixing tank, 1-5 are one-level water-in, and 1-6 is one-level water outlet, and 1-7 is one-level thief hole;
Fig. 3 is the secondary filter post schematic diagram of second reactor system in embodiment one; Wherein 2-1 is that secondary cylinder, 2-2 are that the second supporting layer, 2-3 are that the secondary manganese sand filtration bed of material, 2-4 are that secondary mixer, 2-5 are secondary water-in, and 2-6 is secondary effluent mouth, and 2-7 is secondary thief hole;
Fig. 4 is the concentration of iron temporal evolution graph of a relation of test 1 filter post cultivation stage water inlet, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.
Fig. 5 is the manganese concentration changes with time graph of a relation of test 1 filter post cultivation stage water inlet, one-level water outlet, secondary effluent, and in figure, ■ represents water inlet, and ☆ represents one-level water outlet, and △ represents secondary effluent.
Fig. 6 is the ammonia nitrogen concentration temporal evolution graph of a relation of test 1 filter post cultivation stage water inlet, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ★ represents one-level water outlet, and △ represents secondary effluent.
Fig. 7 is the turbidity temporal evolution graph of a relation of test 1 filter post cultivation stage water inlet, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.
Fig. 8 is the concentration of iron temporal evolution graph of a relation of test 1 groundwater treatment stage water inlet, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.
Fig. 9 is the manganese concentration changes with time graph of a relation of test 1 groundwater treatment stage water inlet, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.
Figure 10 is the ammonia nitrogen concentration temporal evolution graph of a relation of test 1 groundwater treatment stage water inlet, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.
Figure 11 is the turbidity temporal evolution graph of a relation of test 1 groundwater treatment stage water inlet, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.
Embodiment
Embodiment one: (referring to accompanying drawing 1) present embodiment based on biological deferrization demanganization technique time remove ferrimanganic ammonia nitrogen turbidity method carry out according to the following steps:
One, assembling second reactor system:
Second reactor system is by first-level filtering post 1, secondary filter post 2, and regulating tank 3, intermediate water tank 4, the first submersible pump 5, the second submersible pump 6, the first backwash tube 7, the second backwash tube 8 form;
Wherein first-level filtering post 1 is by one-level cylinder 1-1, the first supporting layer 1-2, one-level manganese sand filtration bed of material 1-3, one-level mixing tank 1-4 forms, one-level mixing tank 1-4 is arranged on the top in one-level cylinder 1-1, the first supporting layer 1-2 is arranged on the bottom in one-level cylinder 1-1, on the first supporting layer 1-2, be provided with one-level manganese sand filtration bed of material 1-3, one-level manganese sand filtration bed of material 1-3 divides two-layer up and down, upper strata filter material layer thickness is 0.6m～0.7m, the particle diameter of manganese sand filtering material is 2～2.5mm, and in the filter material layer of upper strata, there is the filter material surface length of the filter material layer that 30～40cm is thick to have iron-oxidizing bacteria, manganese oxidation bacterium and nitrifier, lower floor's filter material layer thickness is 0.6m～0.7m, the particle diameter of manganese sand filtering material is 2.5～3mm, the one-level water-in 1-5 that is arranged on one-level cylinder 1-1 top is communicated with mixing tank 1-4, the one-level water outlet 1-6 that is arranged on one-level cylinder 1-1 bottom is connected with intermediate water tank 4, and the first backwash tube 7 is communicated with one-level water outlet 1-6 simultaneously, one-level thief hole 1-7 is set on the sidewall of first-level filtering post 1-1, and the first submersible pump 5 is arranged in regulating tank 3, and the water outlet of the first submersible pump 5 is communicated with one-level water-in 1-5,
Secondary filter post 2 is by secondary cylinder 2-1, the second supporting layer 2-2, secondary manganese sand filtration bed of material 2-3, secondary mixer 2-4 forms, secondary mixer 2-4 is arranged on the top in secondary cylinder 2-1, the second supporting layer 2-2 is arranged on the bottom in secondary cylinder 2-1, on the second supporting layer 2-2, be provided with manganese sand filtration bed of material 2-3, the thickness of secondary manganese sand filtration bed of material 2-3 is 1m～1.2m, the particle diameter of manganese sand filtering material is 0.5～1.0mm, the secondary water-in 2-5 that is arranged on secondary cylinder 2-1 top is communicated with secondary mixer 2-4, be arranged on the secondary effluent mouth 2-6 of secondary cylinder 2-1 bottom, the second backwash tube 8 is communicated with secondary effluent mouth 2-6 simultaneously, secondary thief hole 2-7 is set on the sidewall of secondary cylinder 2-1, and the second submersible pump 6 is arranged in intermediate water tank 4, and the water outlet of the second submersible pump 6 is communicated with secondary water-in 2-5,
Two, filter post is cultivated:
To after underground water aeration, pass in regulating tank 3, the pH of the water in regulating tank 3 is 7～7.1, and dissolved oxygen concentration is greater than 8mg/L, 7.5～8.5 ℃ of water temperatures; Through the first submersible pump 5, pump in first-level filtering post 1 again, under the condition that is 3.5～4m/h in first-level filtering post filtering velocity, one-level water outlet is injected to intermediate water tank 4, one-level water outlet pumps in secondary filter post 2 through the second submersible pump 6 again, water outlet under the condition that is 5.5～6m/h in secondary filter post filtering velocity, move altogether 30～40 days, filter post is cultivated ripe; After first-level filtering post operation 48h, adopt and through the first backwash tube, pass into water and carry out back flushing, back washing strength 12～14L/ (sm
2), backwashing time 6～7min adopts through the second backwash tube, to pass into water and carry out back flushing after secondary filter post operation 96～144h, and back washing strength is 12～14L/ (sm
2), backwashing time 2～3min;
Three, groundwater treatment:
To after underground water aeration, pass in regulating tank 3, the pH of the water in regulating tank 3 is 7～7.1, and dissolved oxygen concentration is greater than 8mg/L, 7.5～8.5 ℃ of water temperatures; Through the first submersible pump 5, pump in first-level filtering post 1 again, under the condition that is 4～8m/h in first-level filtering post filtering velocity, one-level water outlet is injected to intermediate water tank 4, one-level water outlet pumps in secondary filter post 2 through the second submersible pump 6 again, water outlet under the condition that is 6～12m/h in secondary filter post filtering velocity, when completing the processing of underground water; After first-level filtering post 1 operation 16～24h, adopt and through the first backwash tube 7, pass into water and carry out back flushing, back washing strength 18～19L/ (sm
2), backwashing time 6～10min adopts through the second backwash tube 8, to pass into water and carry out back flushing after secondary filter post 2 operation 96～144h, and back washing strength is 12～14L/ (sm
2), backwashing time 2～3min.
Present embodiment utilizes two-stage filter post to process, iron in water outlet, manganese, ammonia nitrogen drop to respectively 0.2mg/L, 0.05mg/L, below 0.1mg/L, the turbidity of water outlet is simultaneously down to below 0.5NTU, realized the two-stage of ferrimanganic ammonia nitrogen turbidity in underground water and efficiently removed, four indices is all far below national drinking water standard.
Embodiment two: present embodiment is different from embodiment one is that the upper thickness of one-level manganese sand filtration bed of material 1-3 in first-level filtering post 1 is 0.62m～0.68m, the particle diameter of manganese sand filtering material is 2.2～2.4mm, and in upper strata, to have thickness be that the filter material layer of 33～38cm has the manganese sand filtering material of iron-oxidizing bacteria, manganese oxidation bacterium and nitrifier to form by surface length.Other are identical with embodiment one.
In present embodiment, in the filtrate of upper strata, there is part surface length to have the manganese sand filtering material of iron-oxidizing bacteria, manganese oxidation bacterium and nitrifier, filtering post cultivation stage, take this part bacterium as bacterial classification, make the filter material surface in whole filter post all grow iron-oxidizing bacteria, manganese oxidation bacterium and nitrifier.
Embodiment three: the one-level thief hole 1-7 on the present embodiment sidewall that is arranged on first-level filtering post 1-1 different from embodiment one or two has 3～10 along sidewall short transverse.Other is identical with embodiment one or two.
Along a plurality of one-level thief holes place arranging in the short transverse of first-level filtering post sidewall, at filter post cultivation stage, by the test to the water sample of each thief hole, can judge the filtrate mature condition that is positioned at thief hole position.
Embodiment four: the secondary thief hole 28 on the present embodiment sidewall that is arranged on secondary cylinder 2-1 different from embodiment one or two has 3～7 along sidewall short transverse.Other is identical with embodiment one or two.
Embodiment five: present embodiment is different from one of embodiment one to four is when filtering post in step 2 and cultivating is to move 32～36 days under 3.8m/h, the secondary filter post filtering velocity condition that is 5.6m/h in first-level filtering post filtering velocity.Other is identical with one of embodiment one to four.
Embodiment six: present embodiment is different from one of embodiment one to five while being the processing of underground water in step 3, is 5m/h in first-level filtering post filtering velocity, water outlet under the condition that secondary filter post filtering velocity is 7m/h.Other are identical with one of embodiment one to five.
Embodiment seven: present embodiment is different from one of embodiment one to six while being the processing of underground water in step 3, is 6m/h in first-level filtering post filtering velocity, water outlet under the condition that secondary filter post filtering velocity is 9m/h.Other are identical with one of embodiment one to six.
Embodiment eight: present embodiment is different from one of embodiment one to six while being the processing of underground water in step 3, is 7m/h in first-level filtering post filtering velocity, water outlet under the condition that secondary filter post filtering velocity is 11m/h.Other are identical with one of embodiment one to six.
Embodiment nine: present embodiment is different from one of embodiment one to eight is to adopt after first-level filtering post 1 operation 18～22h to pass into water through the first backwash tube 7 and carry out back flushing, back washing strength 18.5L/ (sm
2), backwashing time 8～9min.Other are identical with one of embodiment one to eight.
Embodiment ten: present embodiment is different from one of embodiment one to nine is to adopt to pass into water through the second backwash tube 8 and carry out back flushing, back washing strength 13L/ (sm after secondary filter post 2 operation 100～120h
2), backwashing time 2.5min.Other are identical with one of embodiment one to nine.
With following verification experimental verification beneficial effect of the present invention:
Test 1: this test based on biological deferrization demanganization technique time remove ferrimanganic ammonia nitrogen turbidity method carry out according to the following steps:
One, assembling second reactor system:
Second reactor system is that 250mm, height are 3m by first-level filtering post 1(diameter), secondary filter post 2(diameter be 150mm, high be 2.5m), regulating tank 3, intermediate water tank 4, the first submersible pump 5, the second submersible pump 6, the first backwash tube 7, the second backwash tube 8 form;
Wherein first-level filtering post 1 is by one-level cylinder 1-1, the first supporting layer 1-2, one-level manganese sand filtration bed of material 1-3, one-level mixing tank 1-4 forms, one-level mixing tank 1-4 is arranged on the top in one-level cylinder 1-1, the first supporting layer 1-2 is arranged on the bottom in one-level cylinder 1-1, on the first supporting layer 1-2, be provided with one-level manganese sand filtration bed of material 1-3, one-level manganese sand filtration bed of material 1-3 divides two-layer up and down, upper strata filter material layer thickness is 0.7m, the particle diameter of manganese sand filtering material is 2～2.5mm, and in the filter material layer of upper strata, to have thickness be that the filter material layer of 40cm has iron-oxidizing bacteria by surface length, the manganese sand filtering material of manganese oxidation bacterium and nitrifier forms, lower floor's filter material layer thickness is 0.7m, the particle diameter of manganese sand filtering material is 2.5～3mm, the water-in 1-5 that is arranged on one-level cylinder 1-1 top is communicated with mixing tank 1-4, the one-level water outlet 1-6 that is arranged on one-level cylinder 1-1 bottom is connected with intermediate water tank 4, and the first backwash tube 7 is communicated with one-level water outlet 1-6 simultaneously, on the sidewall of first-level filtering post 1-1, along short transverse, 8 one-level thief hole 1-7 are set, the first submersible pump 5 is arranged in regulating tank 3, and the water outlet of the first submersible pump 5 is communicated with one-level water-in 1-5,
Secondary filter post 2 is by secondary cylinder 2-1, the second supporting layer 2-2, secondary manganese sand filtration bed of material 2-3, secondary mixer 2-4 forms, secondary mixer 2-4 is arranged on the top in secondary cylinder 2-1, the second supporting layer 2-2 is arranged on the bottom in secondary cylinder 2-1, on the second supporting layer 2-2, be provided with manganese sand filtration bed of material 2-3, the thickness of secondary manganese sand filtration bed of material 2-3 is 1m～1.2m, the particle diameter of manganese sand filtering material is 0.5～1.0mm, the secondary water-in 2-5 that is arranged on secondary cylinder 2-1 top is communicated with secondary mixer 2-4, be arranged on the secondary effluent mouth 2-6 of secondary cylinder 2-1 bottom, the second backwash tube 8 is communicated with secondary effluent mouth 2-6 simultaneously, on the sidewall of secondary cylinder 2-1, along short transverse, 6 secondary thief hole 2-7 are set, the second submersible pump 6 is arranged in intermediate water tank 4, and the water outlet of the second submersible pump 6 is communicated with secondary water-in 2-5,
Two, filter post is cultivated:
To after underground water aeration, pass in the regulating tank 3 of second reactor system, the pH of the water in regulating tank 3 is 7, and dissolved oxygen concentration is 8.5mg/L, and water temperature is 8 ℃; Through the first submersible pump 5, pump in first-level filtering post 1 again, under the condition that is 4m/h in first-level filtering post filtering velocity, one-level water outlet is passed into intermediate water tank 4, then pump into secondary filter post through the second submersible pump 6, water outlet under the condition that is 6m/h in secondary filter post filtering velocity, move 40 days, filter post is cultivated ripe; In operational process, detect in real time total concentration of iron, manganese concentration, ammonia nitrogen concentration and the turbidity situation of water inlet, one-level water outlet and secondary effluent, be plotted in respectively in Fig. 4, Fig. 5, Fig. 6 and Fig. 7;
Three, groundwater treatment:
To after underground water aeration, pass in regulating tank 3, the pH of the water in regulating tank 3 is 7, and dissolved oxygen concentration is 8.5mg/L, 8 ℃ of water temperatures, through the first submersible pump 5, pump in first-level filtering post 1 again, under the condition that is 4.5m/h in the filtering velocity of first-level filtering post 1, one-level water outlet is passed into intermediate water tank 4, through the second submersible pump 6, pump into secondary filter post again, water outlet under the condition that is 6.5m/h in the filtering velocity of secondary filter post 2, move 20 days, and then first-level filtering post filtering velocity is risen to 6m/h, secondary filter post filtering velocity rises to 8m/h operation 20 days, finally again the filtering velocity of first-level filtering post 1 is risen to 8m/h, the filtering velocity of secondary filter post 2 rises to 12m/h operation 16 days, in operational process, detect in real time water inlet, total concentration of iron of one-level water outlet and secondary effluent, manganese concentration, ammonia nitrogen concentration and turbidity situation, be plotted in respectively Fig. 8, Fig. 9, in Figure 10 and Figure 11,
At filter post, cultivate and the run duration of groundwater treatment, after first-level filtering post 1 operation 24h, employing passes into water through the first backwash tube 7 and carries out back flushing, back washing strength 18L/ (sm
2), backwashing time 6min adopts through the second backwash tube 8, to pass into water and carry out back flushing, back washing strength 12L/ (sm after secondary filter post 2 operation 120h
2), backwashing time 2min.
In this test, thickness in the upper strata filter material layer of first-level filtering post 1 is that the filtrate of 40cm filter material layer is attached with a large amount of iron-oxidizing bacterias, manganese oxidation bacterium and nitrifier, it is the biological demanganization iron ammonia nitrogen filter post of taking from biological demanganization iron ammonia nitrogen water factory that this surface length has the manganese sand filtering material of iron-oxidizing bacteria, manganese oxidation bacterium and nitrifier, along with system operation, have part iron, manganese oxidation bacterium, nitrifier is inoculated in secondary filter post.At filter post cultivation stage, at Initial stage of culture, ferrimanganic ammonia nitrogen needs thicker filtering layer just can drop to lower level, and after 40 days, ferrimanganic ammonia nitrogen is all removed on the top of first-level filtering post filter post, shows to filter post and cultivates ripe.In culturing process, the removal of ferrimanganic ammonia nitrogen is sequentially iron, ammonia nitrogen, manganese, and after ammonia nitrogen drops to a certain degree, the activity of biological demanganization just can significantly improve; By judging along journey analysis, in this test, filtering post bottom is new manganese sand filtering material, and manganese sand has good adsorptive power to manganese, and the manganese oxidation bacterium before the absorption of manganese sand is saturated on filtrate just can all be oxidized the manganese in water inlet, and therefore, water outlet manganese does not exceed standard.
Fig. 4 is the concentration of iron temporal evolution graph of a relation of the water inlet of filter post cultivation stage, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.As can be seen from Figure 4, after operation 20 days, the maximum concentration of total concentration of iron of secondary effluent is 0.107mg/L, and mean concns is 0.051mg/L, all lower than the 0.3mg/L of national standard.
Fig. 5 is the manganese concentration changes with time graph of a relation of the water inlet of filter post cultivation stage, one-level water outlet, secondary effluent, and in figure, ■ represents water inlet, and ☆ represents one-level water outlet, and △ represents secondary effluent.As can be seen from Figure 5, after operation 20 days, the maximum concentration of the manganese concentration of secondary effluent is 0.023mg/L, and mean concns is 0.0014mg/L, all lower than the 0.1mg/L of national standard.
Fig. 6 is the ammonia nitrogen concentration temporal evolution graph of a relation of the water inlet of filter post cultivation stage, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ★ represents one-level water outlet, and △ represents secondary effluent.As can be seen from Figure 6, after operation 20 days, the maximum concentration of secondary effluent ammonia nitrogen is 0.097mg/L, and mean concns is 0.062mg/L, all lower than the 0.5mg/L of national standard.
Fig. 7 is the turbidity temporal evolution graph of a relation of the water inlet of filter post cultivation stage, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.After operation 20 days, the highest turbidity of secondary effluent is 0.44NTU as can be seen from Figure 7, and average turbidity is 0.36NTU, all lower than the 1NTU of national standard.
In the groundwater treatment stage, first-level filtering post filtering velocity is brought up to 6m/h, and secondary filter post filtering velocity is increased to 9m/h, and the iron in secondary effluent, manganese, ammonia nitrogen, turbidity are all far below drinking water standard; After operation for some time, respectively I and II is filtered to the filtering velocity of post and brought up to 8m/h, 12m/h, the iron in water outlet, manganese, ammonia nitrogen, turbidity are also far below drinking water standard.But the head loss of first-level filtering post is larger, be difficult for filtering velocity further to improve; The head loss of secondary filter post is little.In this process, iron, manganese, ammonia nitrogen, turbidity are by good removal effect.
Fig. 8 is the concentration of iron temporal evolution graph of a relation of the water inlet of groundwater treatment stage, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.As can be seen from Figure 8, along with the raising of filtering velocity, the total iron of water outlet does not have considerable change, and its maximum concentration is 0.165mg/L, and mean concns is 0.037mg/L, all lower than the 0.3mg/L of national standard.
Fig. 9 is the manganese concentration changes with time graph of a relation of the water inlet of groundwater treatment stage, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.Along with the raising of filtering velocity, water outlet manganese does not have considerable change as can be seen from Figure 9, and its maximum concentration is 0.024mg/L, and mean concns is 0.0006mg/L, all lower than the 0.1mg/L of national standard.
Figure 10 is the ammonia nitrogen concentration temporal evolution graph of a relation of the water inlet of groundwater treatment stage, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.As can be seen from Figure 10, along with the raising of filtering velocity, water outlet ammonia nitrogen does not have considerable change, and its maximum concentration is 0.114mg/L, and mean concns is 0.046mg/L, all lower than the 0.5mg/L of national standard.
Figure 11 is the turbidity temporal evolution graph of a relation of the water inlet of groundwater treatment stage, one-level water outlet, secondary effluent, in figure ◆ represent water inlet, ☆ represents one-level water outlet, and △ represents secondary effluent.Along with the raising of filtering velocity, delivery turbidity does not have considerable change as can be seen from Figure 11, and its maximum concentration is 0.42NTU, and mean concns is 0.34NTU, all lower than the 1NTU of national standard.
Claims (10)
1. in the time of based on biological deferrization demanganization technique, remove a method for ferrimanganic ammonia nitrogen turbidity, it is characterized in that the method carries out according to the following steps:
One, assembling second reactor system: second reactor system is by first-level filtering post (1), secondary filter post (2), and regulating tank (3), intermediate water tank (4), the first submersible pump (5), the second submersible pump (6), the first backwash tube (7), the second backwash tube (8) form, wherein first-level filtering post (1) is by one-level cylinder (1-1), the first supporting layer (1-2), the one-level manganese sand filtration bed of material (1-3), one-level mixing tank (1-4) forms, one-level mixing tank (1-4) is arranged on the top in one-level cylinder (1-1), the first supporting layer (1-2) is arranged on the bottom in one-level cylinder (1-1), on the first supporting layer (1-2), be provided with the one-level manganese sand filtration bed of material (1-3), the one-level manganese sand filtration bed of material (1-3) divides two-layer up and down, upper thickness is 0.6m～0.7m, the particle diameter of manganese sand filtering material is 2～2.5mm, and in the filter material layer of upper strata, there is the filter material surface length of the filter material layer that 30～40cm is thick to have iron-oxidizing bacteria, manganese oxidation bacterium and nitrifier, lower thickness is 0.6m～0.7m, and the particle diameter of manganese sand filtering material is 2.5～3mm, the one-level water-in (1-5) that is arranged on one-level cylinder (1-1) top is communicated with one-level mixing tank (1-4), the one-level water outlet (1-6) that is arranged on one-level cylinder (1-1) bottom is connected with intermediate water tank (4), and the first backwash tube (7) is communicated with one-level water outlet (1-6) simultaneously, one-level thief hole (1-7) is set on the sidewall of one-level cylinder (1-1), and the first submersible pump (5) is arranged in regulating tank (3), and the water outlet of the first submersible pump (5) is communicated with one-level water-in (1-5), secondary filter post (2) is by secondary cylinder (2-1), the second supporting layer (2-2), the secondary manganese sand filtration bed of material (2-3), secondary mixer (2-4) forms, secondary mixer (2-4) is arranged on the top in secondary cylinder (2-1), the second supporting layer (2-2) is arranged on the bottom in secondary cylinder (2-1), on the second supporting layer (2-2), be provided with the secondary manganese sand filtration bed of material (2-3), the thickness of the secondary manganese sand filtration bed of material (2-3) is 1m～1.2m, the particle diameter of manganese sand filtering material is 0.5～1.0mm, the secondary water-in (2-5) that is arranged on secondary cylinder (2-1) top is communicated with secondary mixer (2-4), be arranged on the secondary effluent mouth (2-6) of secondary cylinder (2-1) bottom, the second backwash tube (8) is communicated with secondary effluent mouth (2-6) simultaneously, secondary thief hole (2-7) is set on the sidewall of secondary cylinder (2-1), and the second submersible pump (6) is arranged in intermediate water tank (4), and the water outlet of the second submersible pump (6) is communicated with secondary water-in (2-5),
Two, filter post is cultivated: will after underground water aeration, pass into regulating tank (3), the pH of the water in regulating tank is 7～7.1, and dissolved oxygen concentration is greater than 8mg/L, 7.5～8.5 ℃ of water temperatures; Through the first submersible pump, pump in first-level filtering post again, under the condition that is 3.5～4m/h in first-level filtering post filtering velocity, one-level water outlet is injected to intermediate water tank, one-level water outlet pumps in secondary filter post through the second submersible pump again, water outlet under the condition that is 5.5～6m/h in secondary filter post filtering velocity, move altogether 30～40 days, filter post is cultivated ripe; After first-level filtering post operation 48h, adopt and through the first backwash tube, pass into water and carry out back flushing, back washing strength 12～14L/ (sm
2), backwashing time 6～7min adopts through the second backwash tube, to pass into water and carry out back flushing after secondary filter post operation 96～144h, and back washing strength is 12～14L/ (sm
2), backwashing time 2～3min;
Three, groundwater treatment: will pass into after underground water aeration in regulating tank (3), the pH of the water in regulating tank (3) is 7～7.1, and dissolved oxygen concentration is greater than 8mg/L, 7.5～8.5 ℃ of water temperatures; Through the first submersible pump (5), pump in first-level filtering post (1) again, under the condition that is 4～8m/h in first-level filtering post filtering velocity, one-level water outlet is injected to intermediate water tank (4), one-level water outlet pumps in secondary filter post (2) through the second submersible pump (6) again, water outlet under the condition that is 6～12m/h in secondary filter post filtering velocity, completes the processing of underground water; After first-level filtering post (1) operation 16～24h, adopt and through the first backwash tube (7), pass into water and carry out back flushing, back washing strength 18～19L/ (sm
2), backwashing time 6～10min adopts through the second backwash tube (8), to pass into water and carry out back flushing after secondary filter post (2) operation 96～144h, and back washing strength is 12～14L/ (sm
2), backwashing time 2～3min.
2. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 1, the upper thickness that it is characterized in that the one-level manganese sand filtration bed of material (1-3) in first-level filtering post (1) is 0.62m～0.68m, the particle diameter of manganese sand filtering material is 2.2～2.4mm, and in the filter material layer of upper strata, has the filter material surface length of the filter material layer that 33～38cm is thick to have iron-oxidizing bacteria, manganese oxidation bacterium and nitrifier.
3. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 1 and 2, the one-level thief hole (1-7) that it is characterized in that being arranged on the sidewall of one-level cylinder (1-1) has 3～10 along sidewall short transverse.
4. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 1 and 2, the secondary thief hole (2-7) that it is characterized in that being arranged on the sidewall of secondary cylinder (2-1) has 3～7 along sidewall short transverse.
5. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 3, when it is characterized in that filtering in step 2 post and cultivating, in first-level filtering post filtering velocity, be to move 32～36 days under 3.8m/h, the secondary filter post filtering velocity condition that is 5.6m/h.
6. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 1 and 2, while it is characterized in that the processing of underground water in step 3, in first-level filtering post filtering velocity, be 5m/h, water outlet under the condition that secondary filter post filtering velocity is 7m/h.
7. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 1 and 2, while it is characterized in that the processing of underground water in step 3, in first-level filtering post filtering velocity, be 6m/h, water outlet under the condition that secondary filter post filtering velocity is 9m/h.
8. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 1 and 2, while it is characterized in that the processing of underground water in step 3, in first-level filtering post filtering velocity, be 7m/h, water outlet under the condition that secondary filter post filtering velocity is 11m/h.
9. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 1 and 2, it is characterized in that adopting after first-level filtering post (1) operation 18～22h and through the first backwash tube (7), pass into water and carry out back flushing, back washing strength 18.5L/ (sm
2), backwashing time 8～9min.
10. a kind of method of removing ferrimanganic ammonia nitrogen turbidity based on biological deferrization demanganization technique time according to claim 1 and 2, it is characterized in that adopting after secondary filter post (2) operation 100～120h and through the second backwash tube (8), pass into water and carry out back flushing, back washing strength 13L/ (sm
2), backwashing time 2.5min.
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