CN102583713B - Integrated bioaugmenting burned diatomite dynamic membrane gravity flow effluent-discharging drinking water purification process - Google Patents
Integrated bioaugmenting burned diatomite dynamic membrane gravity flow effluent-discharging drinking water purification process Download PDFInfo
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Abstract
The invention provides an integrated bioaugmenting burned diatomite dynamic membrane gravity flow effluent-discharging drinking water purification process and the mixed solution solid-liquid separation effluent-discharging process is completed by a dynamic membrane component driven by the gravity. The raw water on the earth's surface is pumped in a bioaugmenting burned diatomite dynamic membrane device, the bioaugmenting burned diatomite mixed solution in the device is utilized to perform biodegradation to pollutants and remove the pollutants; bioaugmenting burned diatomite forms a dynamic membrane on the dynamic membrane component, and the solid-liquid filtering separation of the mixed solution is performed under the driving of the fixed gravity waterhead between the inner liquid level of the reaction device and the water outlet liquid level. The process provided by the invention is simple, the purification of the raw water on the earth's surface can be realized in one reaction device; the high water permeability of burned diatomite is utilized, the dynamic membrane gravity flow filtering and effluent discharging can be realized under 0.2-0.7m of low fixed gravity waterhead, the power equipment is not required, the operation process is greatly simplified, the effluent quality is good; and the filtering flux of the diatomite dynamic membrane is 100L/m<2>h-300L/m<2>h, the continuous operation time is above 60h-270h and the effluent turbidity is stably below 0.3NTU. The process can be widely used in normal rural water supply or emergency rural water supply in the lack of electricity which is caused by natural disasters and unexpected events.
Description
Technical field
The present invention relates to integral bio-enhancement burned diatomite Dynamic Membrane gravity flow water outlet drinking water purification process, can realize the Dynamic Membrane gravity flow water outlet under the action of gravity, need not the power-equipment effect, effluent quality is good, belongs to drinking water treatment field membrane sepn new technology.
Background technology
In recent years, the pollution of China's surface water quality is day by day serious.The problem that drinking water treatment faces mainly is that the pollutant loads such as organism, ammonia nitrogen are higher in the former water, and the processing of common process (coagulation, precipitation or clarification, filtration and sterilization) is removed the ability relative deficiency to organism and ammonia nitrogen etc.By adding microbe carrier stuffing, enhancement microbiological carries out the efficient removal of the pollutents such as organism, ammonia nitrogen in its surface growth, obtains gradually investigator's concern.
Dynamic Membrane, secondary film or the original position of being otherwise known as forms film, refers to the new film that forms in the wide aperture supporting body surface by particulate matter in precoating paint or the mixed solution to be filtered.The formation of Dynamic Membrane can improve the interception capacity of macropore supporter, and effectively controlling diaphragm pollutes.Because the Dynamic Membrane good effect of separating solid from liquid, the membrane module cost is lower, back flushing is easy, is a kind of very promising novel solid-liquid separation technique.
For the contaminated situation of the most of former water of China, propose to add diatomite as microbe carrier in the reactor, formation absorption, biological degradation separate the novel drinking water treatment process that combines with Dynamic Membrane, reduce to greatest extent former pollutant in water content.For carrying out the solid-liquid separation of diatomite mixed solution, exploitation Dynamic Membrane solid-liquid separation technique.Adopt Dynamic Membrane gravity flow water outlet under the constant water action of gravity, realize the unpowered operation of Dynamic Membrane, can energy efficient, flow process simplifies the operation, have good application prospect, use in the emergency water supply of rural area when being particluarly suitable at ordinary times rural area or natural disaster and accident generation electric power and lacking.
Summary of the invention
The object of the invention be to provide a kind of flow process simple, can effectively remove the pollutents such as organism in the surface water, ammonia nitrogen, suspended substance, and can realize relying on the poor formed fixedly action of gravity head of liquid level water level to drive the integral bio-enhancement burned diatomite Dynamic Membrane gravity flow water outlet drinking water purification process of Dynamic Membrane gravity flow water outlet.
Pollutant removal is mainly removed by mixed solution microbiological deterioration in the biological reinforced burned diatomite Dynamic Membrane reaction unit in the surface water of the present invention, and mixed solution solid-liquid separation exiting water process is finished by fixing action of gravity head driving dynamic film component (flat or tubular type).Surface water is pumped in the integral bio-enhancement burned diatomite Dynamic Membrane gravity flow discharging device, utilize that biological reinforced burned diatomite mixed solution carries out biological degradation and the removal of pollution substance in this device; Biological reinforced burned diatomite forms Dynamic Membrane on dynamic film component surface, and carries out mixed solution under the poor formed fixedly action of gravity head of liquid level water level drives between liquid level and the water outlet in reaction unit and filter water outlet; The stirrer that arranges fully mixes former water with biological reinforced burned diatomite mixed solution, and dissolved oxygen is provided by the gas blower aeration in the mixed solution.
The integral bio-enhancement burned diatomite Dynamic Membrane gravity flow discharging device drinking water purification process that the present invention proposes, described technique is divided into the unloading phase that biological reinforced burned diatomite is spontaneous being cultivated and the device stable operation stage after the biological reinforced burned diatomite mixed solution cultivation maturation; All comprise precoating unloading phase of the spontaneous cultivation of biological reinforced burned diatomite and in the stable operation stage, filter and the back flushing three phases, adopt biological reinforced burned diatomite Dynamic Membrane reaction unit to remove pollutent in the surface water, described biological reinforced burned diatomite Dynamic Membrane reaction unit is by water purifying tank 1, intake pump 2, stirrer 3, dynamic film component 4 and gas blower 6 form, wherein: dynamic film component 4 adopts submerged to install, be positioned at water purifying tank 1 middle part, gas blower 6 by aeration tube to water purifying tank 1 bottom aeration, aeration tube is positioned at dynamic film component 4 belows, stirrer 3 inserts in the water purifying tank 1, intake pump 2 is connected water purifying tank 1 top one end water-in by pipeline with valve, water-in is higher than water purifying tank 1 liquid level, water purifying tank 1 one sides are provided with gravity flow water outlet 5, and waterhead forms fixedly action of gravity head between water purifying tank 1 liquid level and the gravity flow water outlet 5; Concrete steps are as follows:
(1) the spontaneous cultivation of biological reinforced burned diatomite the unloading phase
Select particle diameter be the powder sintered diatomite of 10-35 micron as microbe carrier, adopt the spontaneous culture method of microorganism to cultivate biological burned diatomite; Biological reinforced burned diatomite Dynamic Membrane reaction unit starts first day, in water purifying tank 1, once add burned diatomite, make water purifying tank 1 interior powder sintered diatomite concentration reach 10000mg/L, later in water purifying tank 1, add powder sintered diatomite continuously every day, make that powder sintered diatomite content reaches 15000-20000mg/L in the water purifying tank 1; In the biological reinforced burned diatomite Dynamic Membrane reaction unit initial start stage 15-20d, manually add food glucose as carbon source, improve the rate of rise of microorganism, measure the content of ammonia nitrogen, phosphorus in the pending surface water, and permanganate index, according to a less conduct control matching criterion in ammonia nitrogen, two testing indexs of phosphorus, according to the carbon containing nutritive substance: ammonia nitrogen: the phosphorus mass ratio is 100: 5: 1 ratio, calculate required carbon source amount, calculated value deducts Accuracy of Permanganate Index Determination value in the former water, is the carbon source dosage; In the unloading phase of the spontaneous cultivation of biological reinforced burned diatomite, the Continuous Flow operation scheme is all adopted in water inlet, water outlet, and control water purifying tank 1 interior dissolved oxygen concentration is 2.0-3.0mg/L, and hydraulic detention time is 2-8h; The diatomite mixed solution does not carry out spoil disposal; After 20-30 days, biological reinforced burned diatomite concentration is 15000-20000mg/L in the biological reinforced burned diatomite dynamic membrane device water purifying tank 1, and biological reinforced burned diatomite forms; Afterwards, device enters stable operation stage; In the unloading phase of the spontaneous cultivation of whole biological reinforced burned diatomite, the Dynamic Membrane operational process comprises precoating, filtration and back flushing;
(2) the device stable operation stage after the biological reinforced burned diatomite mixed solution cultivation maturation
The Continuous Flow operation scheme is all adopted in water inlet, water outlet, and water inlet is degraded by the biological reinforced burned diatomite mixed solution of intake pump elder generation in treating pond 1, and dissolved oxygen concentration is 2.0-3.0mg/L in the water purifying tank 1, and hydraulic detention time is 2-8h; The residence time in the control water purifying tank 1 is 50-70 days, calculates the burned diatomite weight that needs replenish according to material balance; Biological reinforced burned diatomite mixed solution gradually supported net is held back the formation Dynamic Membrane, and the Dynamic Membrane precoating is finished and continued 15-20min; Biological reinforced burned diatomite Dynamic Membrane operational process comprises precoating, filtration and back flushing in this stage;
Wherein: the device stable operation stage that biological reinforced burned diatomite is spontaneous cultivate the unloading phase and biological reinforced burned diatomite mixed solution is cultivated after the maturation includes precoating, filtration and back flushing, and concrete operations are as follows:
1) diatomite Dynamic Membrane gravity precoating
During the Dynamic Membrane precoating, the supporter assembly begins water outlet under the vacuum pump suction function, and dynamic membrane support body continues water outlet under fixedly the action of gravity head drives afterwards; The unloading phase: form Dynamic Membrane by not cultured burned diatomite on the dynamic film component surface, finish the Dynamic Membrane precoating process of dynamic film component, the precoating time is 15-20min; Stable operation stage: biological reinforced burned diatomite mixed solution gradually supported net is held back the formation Dynamic Membrane, and the Dynamic Membrane precoating is finished and continued 15-20min;
2) diatomite Dynamic Membrane gravity filtration water outlet
After the Dynamic Membrane precoating finishes, switch by pipeline valve, enter the Dynamic Membrane gravity filtration water outlet stage, under fixedly the action of gravity head drives between liquid level and the water outlet in water purifying tank, guarantee that the diatomite Dynamic Membrane that forms can the Self-flow filtering water outlet; The unit surface Membrane Filtration Flux of control dynamic film component is stabilized in 100L/m
2H-300L/m
2Between the h, continuous operating time surpasses 60h-270h, and delivery turbidity is stable less than 0.3NTU;
In the dynamic membrane filtering process, the cross-flow on Dynamic Membrane surface is formed by supporter bottom aeration mode, also controls simultaneously the growth of Dynamic Membrane thickness for the mixed solution oxygenation.Gas-water ratio determines according to calculation of oxygen demand, minimumly is not less than 1: 1.
3) diatomite Dynamic Membrane Air Reverse flushing
When diatomite Dynamic Membrane gravity filtration effluent flux drops to preset value (100L/m
2H-200L/m
2H) time, need the diatomite Dynamic Membrane is carried out back flushing, adopt Air Reverse flushing time 1 min-2 min, intake pressure 9.8-49 kPa, Dynamic Membrane is come off fully; The dynamic membrane support body assembly does not need regular matting; Control and operation can whole-course automation controls.
Among the present invention, adopt 180-250 order stainless (steel) wire or nylon wire as dynamic membrane support body, supporting body structure adopts flat or tubular type, according to the required supporting network total area of design flux calculative determination, and according to single supporting network size, select the supporting network component count.
Among the present invention, during the Dynamic Membrane precoating, the supporter assembly begins water outlet under the vacuum pump suction function, and the supporter assembly continues water outlet under fixedly the action of gravity head drives afterwards, and diatomite mixed solution gradually supported net is held back the formation Dynamic Membrane.
Among the present invention, described burned diatomite mainly is made of macropore, the about 0.2-0.4 micron of mean pore size, the average about 0.3261m of BET specific surface area
2/ g.
Among the present invention, described action of gravity head height is 0.2-0.7 rice.
Compare the outstanding feature of present method with traditional technology:
(1) biological reinforced burned diatomite dynamic membrane system only has a Dynamic Membrane water purifying tank to consist of, and technical process is simple; Organism, ammonia nitrogen etc. can be removed by biological reinforced burned diatomite mixed solution microbiological deterioration process in the surface water; Adopt 180-250 order stainless (steel) wire or nylon wire as dynamic membrane support body, the membrane module cost of investment is low, but automatic controlling level is high.
(2) under fixedly the action of gravity head drives between liquid level and the water outlet in water purifying tank, carry out the mixed solution solid-liquid separation, realize dynamic membrane filtering gravity flow water outlet, need not the additionaling power effect, and have acting head low, filter out the characteristics that water flux is large and parallel-adder settle-out time is long.
(3) in water purifying tank, add burned diatomite, mainly consisted of by macropore (0.2-0.4 micron), can significantly improve the filtration flux of diatomite Dynamic Membrane; Select the fixedly action of gravity head driving of 0.2-0.7 rice, diatomite Dynamic Membrane Self-flow filtering flux can be stabilized in 100L/m
2H-300L/m
2Between the h, continuous operating time surpasses 60h-270h, and delivery turbidity is stable less than 0.3NTU.
(4) biological reinforced burned diatomite Dynamic Membrane does not exist that film pollutes problem rambunctious in the conventional membrane bioreactor, and back flushing is easy, and operational process need not carry out any matting except normal aeration and Air Reverse flushing.The water outlet of Dynamic Membrane Self-flow filtering, the simplified operation program also reduces energy consumption and working cost.Widespread use in the emergency water supply of rural area when the present invention is adapted at ordinary times water supply of rural area or natural disaster and accident generation electric power shortage.
Description of drawings
Fig. 1 is the embodiment process flow sheet.
Number in the figure: 1 is biological intensified-sintered diatomite Dynamic Membrane gravity flow water outlet water purifying tank; 2 is intake pump; 3 is stirrer; 4 is dynamic film component; 5 are Dynamic Membrane gravity flow water outlet; 6 is gas blower; H is that Dynamic Membrane is flow automatically and hydropexis action of gravity head.
Embodiment
Further specify by reference to the accompanying drawings the present invention below by embodiment.
Embodiment 1
The powder sintered diatomite that adopts in the implementation process, particle diameter 10-35 micron, the about 0.2-0.4 micron of mean pore size, the average about 0.3261m of BET specific surface area
2/ g.Adopt flat dynamic membrane support body assembly to filter water outlet.Surface water is taken from river, earth's surface, Shanghai, adopts the spontaneous culture method of microorganism to cultivate biological reinforced burned diatomite.
(1) the spontaneous cultivation of biological reinforced burned diatomite
1) diatomite dosing method
Reaction unit starts first day, in device, once add burned diatomite, make water purifying tank 1 interior powder sintered diatomite mixed liquid concentration reach 10000mg/L, later in reaction unit, add powder sintered diatomite continuously every day, make that powder sintered diatomite content reaches 18000mg/L in the reaction unit.
2) add and add nutrition
In the initial start stage 15d of system, manually add food glucose as carbon source, make reaction unit water inlet permanganate index be about 10mg/L, improve the rate of rise of microorganism.Measure the content of ammonia nitrogen, phosphorus in the pending surface water, and permanganate index, according to a less conduct control matching criterion in ammonia nitrogen, two testing indexs of phosphorus, according to the carbon containing nutritive substance: ammonia nitrogen: the relation of phosphorus=100: 5: 1, calculate required carbon source amount, calculated value deducts that the Accuracy of Permanganate Index Determination value is the carbon source dosage in the former water.
After 20 days, mixed solution maintains 18000mg/L in the biological reinforced burned diatomite dynamic membrane device, and biological reinforced burned diatomite forms.Afterwards, device enters stable operation stage.
(2) device operational conditions
The unloading phase of the spontaneous cultivation of biological reinforced burned diatomite and in the stable operation stage, the Continuous Flow operation scheme is all adopted in water inlet, water outlet, and water purifying tank 1 interior dissolved oxygen concentration is 2.0-3.0mg/L, and hydraulic detention time is 2-8h; The unloading phase diatomite mixed solution do not carry out spoil disposal; Stable operation stage, the biological reinforced residence time of burned diatomite mixed solution in water purifying tank 1 is 50 days, calculates the burned diatomite weight that needs replenish according to material balance.
Wherein: the device stable operation stage that biological reinforced burned diatomite is spontaneous cultivate the unloading phase and biological reinforced burned diatomite mixed solution is cultivated after the maturation includes precoating, filtration and back flushing.
(3) biological reinforced burned diatomite Dynamic Membrane operational process
1) diatomite Dynamic Membrane gravity precoating
Adopt 200 order stainless (steel) wires as dynamic membrane support body, supporting body structure adopts flat, and dynamic film component adopts immersion to install.The dynamic film component operation comprises precoating, filtration and back flushing three phases.During the Dynamic Membrane precoating, the supporter assembly begins water outlet under the vacuum pump suction function, and dynamic membrane support body fixedly continues water outlet under the driving of action of gravity head at 0.5m afterwards; The unloading phase: form Dynamic Membrane by not cultured burned diatomite on the dynamic film component surface, finish the Dynamic Membrane precoating process of dynamic film component, the precoating time is 15-20min; Stable operation stage: biological reinforced burned diatomite mixed solution gradually supported net is held back the formation Dynamic Membrane, and the Dynamic Membrane precoating is finished and continued 15-20min;
In the Dynamic Membrane precoating process, the cross-flow of supporting body surface is formed by supporter bottom aeration mode, for the thickness that the Dynamic Membrane precoating forms is also controlled in the mixed solution oxygenation simultaneously.
2) diatomite Dynamic Membrane gravity filtration water outlet
After the Dynamic Membrane precoating finishes, switch by pipeline valve, enter the Dynamic Membrane gravity filtration water outlet stage.In fixedly action of gravity head effect of 0.5m, realize diatomite Dynamic Membrane gravity flow water outlet, filtration flux can be stabilized in 250L/m
2H-200L/m
2H, continuous operating time surpasses 90h, and delivery turbidity is stable less than 0.25NTU.In the dynamic membrane filtering process, the cross-flow on Dynamic Membrane surface is formed by supporter bottom aeration mode, also controls simultaneously the growth of Dynamic Membrane thickness for the mixed solution oxygenation, and gas-water ratio is 1:1.
3) diatomite Dynamic Membrane Air Reverse flushing
When diatomite Dynamic Membrane gravity filtration effluent flux drops to preset value 200L/m
2During h, need the diatomite Dynamic Membrane is carried out back flushing.Adopt Air Reverse flushing times 2 min, intake pressure 19.6 kPa, Dynamic Membrane is come off fully.
Embodiment 2
The powder sintered diatomite that adopts in the implementation process, particle diameter 10-35 micron, the about 0.2-0.4 micron of mean pore size, the average about 0.3261m of BET specific surface area
2/ g.Adopt tubular dynamic membrane supporter assembly to filter water outlet.Surface water is taken from river, earth's surface, Shanghai, adopts the spontaneous culture method of microorganism to cultivate biological burned diatomite.
(1) the spontaneous cultivation of biological reinforced burned diatomite
1) diatomite dosing method:
Reaction unit starts first day, in device, once add burned diatomite, make water purifying tank 1 interior powder sintered diatomite mixed liquid concentration reach 10000mg/L, later in reaction unit, add powder sintered diatomite continuously every day, make that powder sintered diatomite content reaches 15000mg/L in the reaction unit.
2) add and add nutrition
In the initial start stage 15d of system, manually add food glucose as carbon source, make reaction unit water inlet permanganate index be about 10mg/L, improve the rate of rise of microorganism.Measure the content of ammonia nitrogen, phosphorus in the pending surface water, and permanganate index, according to a less conduct control matching criterion in ammonia nitrogen, two testing indexs of phosphorus, according to the carbon containing nutritive substance: ammonia nitrogen: the relation of phosphorus=100: 5: 1, calculate required carbon source amount, calculated value deducts Accuracy of Permanganate Index Determination value in the former water.Be the carbon source dosage.
After 20 days, mixed solution maintains 15000mg/L in the biological reinforced burned diatomite dynamic membrane device, and biological reinforced burned diatomite forms.Afterwards, device enters stable operation stage.
(2) device operational conditions
The unloading phase of the spontaneous cultivation of biological reinforced burned diatomite and in the stable operation stage, the Continuous Flow operation scheme is all adopted in water inlet, water outlet, and water purifying tank 1 interior dissolved oxygen concentration is 2.0-3.0mg/L, and hydraulic detention time is 2-8h; The unloading phase diatomite mixed solution do not carry out spoil disposal; Stable operation stage, the biological reinforced residence time of burned diatomite mixed solution in water purifying tank 1 is 60 days, calculates the burned diatomite weight that needs replenish according to material balance.
Wherein: the device stable operation stage that biological reinforced burned diatomite is spontaneous cultivate the unloading phase and biological reinforced burned diatomite mixed solution is cultivated after the maturation includes precoating, filtration and back flushing.
(3) biological reinforced burned diatomite Dynamic Membrane operational process
1) diatomite Dynamic Membrane gravity precoating
Adopt 200 order stainless (steel) wires as dynamic membrane support body, supporting body structure adopts tubular type, and dynamic film component adopts immersion to install.The dynamic film component operation comprises precoating, filtration and back flushing three phases.During the Dynamic Membrane precoating, the supporter assembly begins water outlet under the vacuum pump suction function, and dynamic membrane support body is fixedly continuing water outlet under the action of gravity head 0.2m effect afterwards; The unloading phase: form Dynamic Membrane by not cultured burned diatomite on the dynamic film component surface, finish the Dynamic Membrane precoating process of dynamic film component, the precoating time is 15-20min; Stable operation stage: biological reinforced burned diatomite mixed solution gradually supported net is held back the formation Dynamic Membrane, and the Dynamic Membrane precoating is finished and continued 15-20min;
In the Dynamic Membrane precoating process, the cross-flow of supporting body surface is formed by supporter bottom aeration mode, also controls simultaneously the thickness that the Dynamic Membrane precoating forms for the mixed solution oxygenation, and gas-water ratio is 1: 1.
2) diatomite Dynamic Membrane gravity filtration water outlet
After the Dynamic Membrane precoating finishes, switch by pipeline valve, enter the Dynamic Membrane gravity filtration water outlet stage.In fixedly action of gravity head effect of 0.2m, realize diatomite Dynamic Membrane gravity flow water outlet, filtration flux can be stabilized in 200L/m2 h-100L/m2 h, and continuous operating time surpasses 60h, and delivery turbidity is stable less than 0.25NTU.In the dynamic membrane filtering process, the cross-flow on Dynamic Membrane surface is formed by supporter bottom aeration mode, also controls simultaneously the growth of Dynamic Membrane thickness for the mixed solution oxygenation, and gas-water ratio is 1:1.
3) diatomite Dynamic Membrane Air Reverse flushing
When diatomite Dynamic Membrane gravity filtration effluent flux drops to preset value 100L/m
2During h, need the diatomite Dynamic Membrane is carried out back flushing.Adopt Air Reverse flushing time 1 min, intake pressure 19.6 kPa, Dynamic Membrane is come off fully.
Claims (4)
1. integral bio-enhancement burned diatomite Dynamic Membrane gravity flow discharging device drinking water purification process is characterized in that described technique is divided into the unloading phase that biological reinforced burned diatomite is spontaneous being cultivated and the device stable operation stage after the biological reinforced burned diatomite mixed solution cultivation maturation; All comprise precoating, filtration and back flushing three phases unloading phase of the spontaneous cultivation of biological reinforced burned diatomite and in the device stable operation stage after the biological reinforced burned diatomite mixed solution cultivation maturation; Adopt biological reinforced burned diatomite Dynamic Membrane reaction unit to remove pollutent in the surface water, described biological reinforced burned diatomite Dynamic Membrane reaction unit is by water purifying tank (1), intake pump (2), stirrer (3), dynamic film component (4) and gas blower (6) form, dynamic film component (4) adopts submerged to install, be positioned at water purifying tank (1) middle part, gas blower (6) by aeration tube to water purifying tank (1) bottom aeration, aeration tube is positioned at dynamic film component (4) below, stirrer (3) inserts in the water purifying tank (1), intake pump (2) is connected water purifying tank (1) top one end water-in by pipeline with valve, water-in is higher than water purifying tank (1) liquid level, water purifying tank (1) one side is provided with gravity flow water outlet (5), and waterhead forms fixedly action of gravity head between water purifying tank (1) liquid level and the gravity flow water outlet (5); Concrete steps are as follows:
(1) the spontaneous cultivation of biological reinforced burned diatomite the unloading phase
Select particle diameter be the powder sintered diatomite of 10-35 micron as microbe carrier, adopt the spontaneous culture method of microorganism to cultivate biological burned diatomite; Biological reinforced burned diatomite Dynamic Membrane reaction unit starts first day, in water purifying tank (1), once add burned diatomite, make the interior powder sintered diatomite concentration of water purifying tank (1) reach 10000mg/L, later in water purifying tank (1), add powder sintered diatomite continuously every day, make that powder sintered diatomite content reaches 15000-20000mg/L in the water purifying tank (1); In the biological reinforced burned diatomite Dynamic Membrane reaction unit initial start stage 15-20d, manually add food glucose as carbon source, by content and the permanganate index of measuring ammonia nitrogen, phosphorus in the pending surface water, according to a less conduct control matching criterion in ammonia nitrogen, two testing indexs of phosphorus, according to the carbon containing nutritive substance: ammonia nitrogen: the phosphorus mass ratio is 100: 5: 1 ratio, calculate required carbon source amount, calculated value deducts Accuracy of Permanganate Index Determination value in the former water, is the carbon source dosage; In the unloading phase of the spontaneous cultivation of biological reinforced burned diatomite, the Continuous Flow operation scheme is all adopted in water inlet, water outlet, and the interior dissolved oxygen concentration of control water purifying tank (1) is 2.0-3.0mg/L, and hydraulic detention time is 2-8h; Biological reinforced burned diatomite concentration is 15000-20000mg/L in the biological reinforced burned diatomite dynamic membrane device water purifying tank (1), and after biological reinforced burned diatomite formed, device entered stable operation stage; In the unloading phase of the spontaneous cultivation of whole biological reinforced burned diatomite, the Dynamic Membrane operational process comprises precoating, filtration and back flushing;
(2) the device stable operation stage after the biological reinforced burned diatomite mixed solution cultivation maturation
The Continuous Flow operation scheme is all adopted in water inlet, water outlet, water inlet is degraded by the biological reinforced burned diatomite mixed solution of intake pump elder generation in treating pond, the residence time in the control water purifying tank is 50-70 days, calculates the burned diatomite weight that needs replenish according to material balance; Biological reinforced burned diatomite mixed solution gradually supported net is held back the formation Dynamic Membrane, and the Dynamic Membrane precoating is finished and continued 15-20min; Biological reinforced burned diatomite Dynamic Membrane operational process comprises precoating, filtration and back flushing in this stage;
Wherein: the device stable operation stage that biological reinforced burned diatomite is spontaneous cultivate the unloading phase and biological reinforced burned diatomite mixed solution is cultivated after the maturation includes precoating, filtration and back flushing, and concrete operations are as follows:
1) diatomite Dynamic Membrane gravity precoating
During the Dynamic Membrane precoating, the supporter assembly begins water outlet under the vacuum pump suction function, and dynamic membrane support body continues water outlet under fixedly the action of gravity head drives afterwards; The unloading phase: form Dynamic Membrane by not cultured burned diatomite on the dynamic film component surface, finish the Dynamic Membrane precoating process of dynamic film component, the precoating time is 15-20min; Stable operation stage: biological reinforced burned diatomite mixed solution gradually supported net is held back the formation Dynamic Membrane, and the Dynamic Membrane precoating is finished and continued 15-20min;
2) diatomite Dynamic Membrane gravity filtration water outlet
After the Dynamic Membrane precoating finishes, switch by pipeline valve, enter the Dynamic Membrane gravity filtration water outlet stage, under fixedly the action of gravity head drives between liquid level and the water outlet in water purifying tank, guarantee the diatomite Dynamic Membrane Self-flow filtering water outlet that forms; The unit surface Membrane Filtration Flux of control dynamic film component is stabilized in 100L/m
2H-300L/m
2Between the h, continuous operating time surpasses 60h-270h, and delivery turbidity is stable less than 0.3NTU;
In the dynamic membrane filtering process, the cross-flow on Dynamic Membrane surface is formed by supporter bottom aeration mode, and gas-water ratio is definite according to calculation of oxygen demand, minimumly is not less than 1: 1;
3) diatomite Dynamic Membrane Air Reverse flushing
When diatomite Dynamic Membrane gravity filtration effluent flux drops to preset value 100L/m
2H-200L/m
2During h, the diatomite Dynamic Membrane is carried out back flushing, adopt Air Reverse flushing time 1 min-2min, intake pressure 9.8-49kPa, Dynamic Membrane is come off fully; The dynamic membrane support body assembly does not need regular matting.
2. technique according to claim 1 is characterized in that dynamic membrane support body adopts 180-250 order stainless (steel) wire or nylon wire, and supporting body structure adopts flat or tubular type.
3. technique according to claim 1 is characterized in that described burned diatomite mainly is made of macropore, and mean pore size is the 0.2-0.4 micron, average BET specific surface area 0.3261m
2/ g.
4. technique according to claim 1 is characterized in that described action of gravity head height is 0.2-0.7 rice.
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| CN102963973B (en) * | 2012-12-10 | 2013-10-16 | 同济大学 | Method for purifying raw water by using biologically-enhanced diatomite-dynamic membrane ultrafiltration-supported separation process |
| CN108380046A (en) * | 2018-03-07 | 2018-08-10 | 同济大学 | A kind of dynamic film sewage treatment system for the processing of lavatory fecaluria |
| CN112830640A (en) * | 2021-02-25 | 2021-05-25 | 天津市海跃水处理高科技有限公司 | Water treatment membrane and water treatment device and method |
| CN114772820A (en) * | 2022-05-25 | 2022-07-22 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Backwashing water recovery equipment |
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| JP3733705B2 (en) * | 1997-08-08 | 2006-01-11 | 日立プラント建設株式会社 | Supporting driving method of carrier |
| JP2007319792A (en) * | 2006-06-01 | 2007-12-13 | Daicen Membrane Systems Ltd | Waste water treatment method |
| KR100955585B1 (en) * | 2008-10-07 | 2010-04-30 | (주) 일신네이쳐 | Floating type water purification apparatus for lake |
| CN101746842B (en) * | 2008-12-12 | 2011-12-07 | 同济大学 | Coupling water supply purifying method of biological reinforced powder active carbon and diatomite |
| CN101746848B (en) * | 2008-12-12 | 2012-05-23 | 同济大学 | Dynamic film separating method for processing sewage by using biological diatomite |
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