CN216005565U - Device for advanced treatment of sewage to surface of earth and quasi-IV-class water quality - Google Patents
Device for advanced treatment of sewage to surface of earth and quasi-IV-class water quality Download PDFInfo
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- CN216005565U CN216005565U CN202122385667.6U CN202122385667U CN216005565U CN 216005565 U CN216005565 U CN 216005565U CN 202122385667 U CN202122385667 U CN 202122385667U CN 216005565 U CN216005565 U CN 216005565U
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Abstract
The utility model discloses a device for advanced treatment of sewage to surface of earth to achieve IV-class water quality, which comprises an ozone/ceramic membrane pool, a buffer and back flush water pool and a biological activated carbon filter pool; the ozone/ceramic membrane pool comprises a water inlet area and an ozone/ceramic membrane filtering area, wherein a plurality of ozone/ceramic membrane assemblies are arranged in the ozone/ceramic membrane filtering area, a plurality of ceramic membranes are arranged in each ozone/ceramic membrane assembly, and each ozone/ceramic membrane assembly provides ozone through an ozone generator; the device of the utility model forms a new process suitable for industrial park sewage treatment plants to improve the standard and transform through the technical combination of ozone, ceramic membrane and biological activated carbon, and can efficiently and stably improve the standard to the standard of surface standard IV water quality.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, a surface of earth IV class quality of water is related to, concretely relates to device of sewage advanced treatment to surface of earth IV class quality of water.
Background
In order to promote ecological civilization construction, the nation has issued action plans for preventing and treating water pollution and action schemes for improving quality and increasing efficiency of town sewage treatment (2019 and 2021), so that sewage treatment plants in parts of the nation face a new round of upgrading and reconstruction work. The discharge standard of an important basin or an environmental sensitive area exceeds the first class A standard (the first class A standard for short) of pollutant discharge standard of urban sewage treatment plants (GB18918-2002), and part of indexes are close to or even equal to the IV standard (the quasi IV standard for short) in the surface water environmental quality standard (GB 3838-2002). On one hand, the problem of pollution of the receiving water body is solved from the aspect of sewage deep treatment; on the other hand, in the aspect of clean production, the effluent is recycled as reclaimed water after the quality of the effluent is improved, and the recycling of water resources is realized.
As a new pollution control technology, membrane separation and ozone oxidation have been applied to advanced wastewater treatment due to their unique decontamination potential, however, they still have many disadvantages due to various reasons, such as:
(A) although the membrane fouling problem can be alleviated by various cleaning methods, the membrane performance and service life are affected due to long-term and frequent pressure impact and chemical erosion, the membrane operation cost is increased, and the scale and commercial application of the membrane is limited.
(B) At present, microfiltration membranes, nanofiltration membranes, reverse osmosis membranes and the like which are relatively widely adopted in the field of sewage treatment are mostly made of organic materials, and the membranes are low in mechanical strength, poor in chemical stability and weak in oxidation resistance, so that the nesting of the membranes with other oxidation technologies is hindered.
(C) Ozone oxidation has two modes of contact oxidation and catalytic oxidation. Compared with contact oxidation, the catalytic oxidation promotes strong oxidative hydroxyl free radical (. OH) due to the contact of ozone and the catalyst, improves the oxidation rate and reduces the ozone dosage, but increases the input of the solid-phase catalyst.
(D) As described in (A), (B) and (C), the existing ozone oxidation and membrane separation technologies are combined in cascade, the process chain is long, and great troubles are brought to the rapid upgrading and reconstruction of a sewage treatment plant on the basis of the existing structures.
Disclosure of Invention
Not enough to prior art exists, the utility model aims to provide a device of sewage advanced treatment to the accurate IV class quality of water of earth's surface, the efficiency of the sewage advanced treatment technology among the solution prior art remains the technical problem who further promotes.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a device for advanced treatment of sewage to surface quasi-IV water quality comprises an ozone/ceramic membrane pool, a buffer and back flush water pool and a biological activated carbon filter pool;
the ozone/ceramic membrane pool comprises a water inlet area and an ozone/ceramic membrane filtering area, the top of the water inlet area is closed, the top of the ozone/ceramic membrane filtering area is closed, and the water inlet area and the ozone/ceramic membrane filtering area are separated by a first partition plate; a first water weir is vertically arranged in the middle of the water inlet area, a water inlet with a first water inlet gate is arranged at the bottom of the side wall of the water inlet area outside the first water weir, and the water inlet with the first water inlet gate is communicated with a water inlet pipe; the bottom of the first clapboard at the inner side of the first weir is provided with a bottom water passing inlet hole communicated with the water inlet area and the ozone/ceramic membrane filtering area;
a plurality of ozone/ceramic membrane assemblies are arranged in the ozone/ceramic membrane filtering area, a plurality of ceramic membranes are arranged in each ozone/ceramic membrane assembly, and each ozone/ceramic membrane assembly provides ozone through an ozone generator;
the ozone/ceramic membrane components are connected in parallel in groups and then are respectively communicated with a water inlet at the upper part of the buffer and back flush water tank through a first valve and a suction pump; the water outlet at the bottom of the buffer and backwashing water pool is communicated with the ozone/ceramic membrane assemblies which are grouped and connected in parallel through a first water backwashing pump and a second valve to perform water backwashing;
the biological activated carbon filter comprises a carbon filtering area and an effluent stable flow area, the top of the carbon filtering area is closed, the top of the effluent stable flow area is closed, and the carbon filtering area and the effluent stable flow area are separated by a second partition plate; a biological activated carbon filter material is arranged in the carbon filtering area; a second weir is vertically arranged in the middle of the water outlet stable flow area, a bottom water outlet hole communicated with the carbon filtering area and the water outlet stable flow area is formed in the bottom of a second partition plate on the inner side of the second weir, and a water outlet gate is arranged on the bottom water outlet hole; a water outlet is formed in the bottom of the side wall of the water outlet steady flow area on the outer side of the second water weir and communicated with a water outlet pipe;
the water outlet at the upper part of the buffering and backwashing water tank is communicated with the water inlet with a second water inlet gate at the upper part of the carbon filtering area; and a water outlet at the bottom of the buffering and backwashing water tank is communicated with the bottom of the carbon filtering area through a second water backwashing pump for water backwashing.
And a flap valve is arranged on one side of the tank wall in a carbon filtering area of the biological activated carbon filtering tank.
The first valve, the second valve and the third valve are all pneumatic butterfly valves.
The utility model discloses still have following technical characteristic:
the bottom of the carbon filtering area is also communicated with an air back-flushing pipe with a third valve for air flushing.
The device also comprises a medicine dissolving barrel which is communicated with the ozone/ceramic membrane assemblies which are grouped and connected in parallel through a medicine adding pump and a second valve to carry out on-line medicine washing.
And sludge at the bottom of the ozone/ceramic membrane filtering area is discharged through a sludge discharge pump, and the sludge discharge pump is communicated with a sludge conveying pipe.
The water inlet pipe is provided with an SS on-line detector and a COD on-line detector; a liquid level meter and an SS on-line detector are arranged on the ozone/ceramic membrane filtering area; a pressure gauge is arranged on a pipeline between the ozone/ceramic membrane component and the first valve; a flow meter is arranged on a pipeline between the suction pump and the buffer and back washing water tank; a liquid level meter is arranged on the buffer and back washing water tank; and a liquid level meter is arranged on the carbon filtering area.
The utility model discloses still provide a technology of sewage advanced treatment to the accurate IV class quality of water of earth's surface, this technology adopts as above the device of sewage advanced treatment to the accurate IV class quality of water of earth's surface.
Specifically, the process comprises the following steps:
step 1, sewage flows into an ozone/ceramic membrane pool by gravity, and pollutants in the water are in full contact with ozone and hydroxyl radicals generated by catalysis of a ceramic membrane and react in an ozone/ceramic membrane filtering area, the surface of the ceramic membrane and pores of the ceramic membrane;
step 4, after the suction pump of the ozone/ceramic membrane pool works for a set time, the ozone/ceramic membrane pool enters a back washing state, and back washing water comes from a buffer and back washing water pool; and after the biological activated carbon filter works for a set time, the biological activated carbon filter also enters a backwashing state, the backwashing of the biological activated carbon filter adopts a gas-water combined flushing mode, backwashing water comes from a buffering and backwashing water tank, and backwashing gas comes from an air blower room.
In step 1, the ceramic membrane is alpha-Al2O3The effective filtration area of the flat membrane is 0.5m2The nominal pore diameter of the membrane is 0.1um, and 0.1um standard particles with the particle diameter of more than or equal to 95 percent can be removed.
In the step 1, the contact reaction time of the ozone and the pollutants is 1-2 h, and the adding amount of the ozone is 5-25 mg/L.
In the step 3, the biological activated carbon filter adopts a downward flow mode, the designed filtering speed is 6-10m/h, and the empty bed retention time is 20-50 min.
In step 3, the biological activated carbon filter material in the biological activated carbon filter tank adopts a support layer and a carbon filter layer, wherein the support layer adopts a graded cobblestone filter material, and the carbon filter layer adopts a shell activated carbon filter material.
The ceramic membrane cleaning method comprises online backwashing, online chemical washing and offline cleaning.
The method also comprises an automatic control method, and the method comprises the following steps: monitoring two indexes of SS and COD, and respectively setting corresponding alarm thresholds; when the inlet water SS is more than or equal to SSLimit ofThen, alarming to prompt the adjustment of the front-end process; when the influent COD is more than or equal to the CODLimit ofIn time, an alarm is given to prompt the increase of the ozone dosage so as to degrade COD and slow down membrane blockage.
Compared with the prior art, the utility model, following technological effect has:
(I) the device of the utility model forms a new process suitable for industrial park sewage treatment plants to improve the standard and reform through the technical combination of ozone, ceramic membrane and biological activated carbon, and can efficiently and stably improve the standard of water to the standard of surface of earth IV water quality.
(II) the nested combination of the ozone and the ceramic membrane realizes the advantage superposition of '1 +1 is more than or equal to 2', and specifically:
firstly, the ceramic membrane plays a role in filtering, and simultaneously, due to the particularity of the material, ozone is promoted to contact with the ceramic membrane, and then hydroxyl radicals (OH & ltcng & gt.) are generated through a series of chain reactions, so that compared with ozone contact oxidation, the ozone dosage can be saved by 30-50%.
Secondly, the nano-scale membrane pore structure of the ceramic membrane improves the contact area between the ceramic membrane and ozone, shortens the diffusion distance of substances, promotes mass transfer and reaction to be completed in a short time, and improves the reaction rate by 400-500 times.
Thirdly, the ozone in-situ control membrane pollution improves the service life of the ceramic membrane and reduces the operation and maintenance cost of the ceramic membrane.
(III) the active carbon carrier with strong specific surface and porous structure enriches microorganisms and forms a biological film to adsorb and degrade pollutants, and meanwhile, the biological degradation of the film surface can regenerate the active carbon.
(IV) the catalytic decomposition effect of the ceramic membrane and the surface layer active carbon on ozone obviously improves the dissolved oxygen concentration of the upper layer of the active carbon filter tank, the numerical value is as high as 5-8 mg/L, the requirement of removing ammonia nitrogen organisms is met, and special oxygen increasing measures are not required to be added; meanwhile, the microbial community structure of the biological activated carbon filter and the vertical gradient distribution of dissolved oxygen also improve the denitrification effect of the system.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for advanced treatment of wastewater to surface level IV water quality;
the meaning of the individual reference symbols in the figures is: 1-an ozone/ceramic membrane pool, 2-a buffer and back flush water pool, 3-a biological activated carbon filter pool, 4-a first valve, 5-a suction pump, 6-a first water back flush pump, 7-a second valve, 8-a second water back flush pump, 9-a third valve, 10-an air back flush pipe, 11-a medicine dissolving barrel and 12-a medicine adding pump; 13-a sludge discharge pump, 14-a sludge conveying pipe, 15-an SS on-line detector, 16-a COD on-line detector, 17-a liquid level meter, 18-a pressure meter and 19-an on-line flow meter;
101-a water inlet area, 102-an ozone/ceramic membrane filtering area, 103-a first partition board, 104-a first weir, 105-a first water inlet gate, 106-a water inlet pipe, 107-a bottom water inlet hole, 108-an ozone/ceramic membrane component and 109-a sludge discharge pipe;
301-carbon filtration zone, 302-effluent stable zone, 303-second partition plate, 304-second weir, 305-bottom water outlet hole, 306-water outlet gate, 307-water outlet pipe, 308-second water inlet gate and 309-flap valve.
The following examples are provided to explain the present invention in further detail.
Detailed Description
It should be noted that all the raw materials and equipment in the present invention are the raw materials and equipment known in the art without specific description.
Compared with an organic membrane, the ceramic membrane has the advantages of high mechanical strength, good chemical stability, strong oxidation resistance, uniform pore size distribution of membrane pores, long service life and the like, and the special material is also a good catalyst for catalyzing ozonization; meanwhile, the molecular structure of pollutants and the adsorption and desorption capacity of the pollutants on the surface and in the pores of the membrane can be changed by ozone pre-oxidation, the pollution of the membrane is relieved, and the permeation flux of the membrane can be restored to more than 85 percent.
Research shows that the ozone and the ceramic membrane are used for treating NH3the-N and TN are not substantially removed even because the strong oxidizing properties of ozone and hydroxyl radicals decompose the organic nitrogen oxides, resulting in the effluent NH3Instead, -N is increased. Currently, NH is targeted in advanced wastewater treatment3the-N and TN tend to adopt the processes of the aeration biological filter and the denitrification deep bed filter, but the operation effect is not ideal, and the operation cost is obviously high.
The utility model discloses with the nested combination of ozone and ceramic membrane to with the help of the porous structure of active carbon and the adnexed good carrier of microorganism, the stack advantage of performance "1 +1 is more than or equal to 2" also provides a novel, high-efficient and economic technique for sewage treatment plant successfully carries out the standard to the accurate IV class quality of water of earth's surface from now on.
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
Example 1:
the embodiment provides a device for advanced treatment of sewage to surface level IV water quality, which comprises an ozone/ceramic membrane pool 1, a buffering and backwashing water pool 2 and a biological activated carbon filter pool 3, as shown in figure 1;
the ozone/ceramic membrane pool 1 comprises a water inlet area 101 and an ozone/ceramic membrane filtering area 102, the top of the water inlet area 101 is closed, the top of the ozone/ceramic membrane filtering area 102 is closed, and the water inlet area 101 and the ozone/ceramic membrane filtering area 102 are separated by a first partition plate 103; a first weir 104 is vertically arranged in the middle of the water inlet area 101, a water inlet with a first water inlet gate 105 is arranged at the bottom of the side wall of the water inlet area 101 outside the first weir 104, and the water inlet with the first water inlet gate 105 is communicated with a water inlet pipe 106; the bottom of the first partition plate 103 at the inner side of the first weir 104 is provided with a bottom water inlet hole 107 communicated with the water inlet area 101 and the ozone/ceramic membrane filtering area 102;
a plurality of ozone/ceramic membrane modules 108 are arranged in the ozone/ceramic membrane filtering area 102, a plurality of ceramic membranes are arranged in each ozone/ceramic membrane module 108, and each ozone/ceramic membrane module 108 provides ozone through an ozone generator;
a plurality of ozone/ceramic membrane assemblies 108 are grouped and connected in parallel and are respectively communicated with a water inlet at the upper part of the buffer and backwashing water pool 2 through a first valve 4 and a suction pump 5; the water outlet at the bottom of the buffer and backwashing water pool 2 is communicated with a plurality of ozone/ceramic membrane assemblies 108 which are grouped and connected in parallel through a first water backwashing pump 6 and a second valve 7 for water backwashing;
the biological activated carbon filter 3 comprises a carbon filtering area 301 and an effluent stable flow area 302, the top of the carbon filtering area 301 is closed, the top of the effluent stable flow area 302 is closed, and the carbon filtering area 301 and the effluent stable flow area 302 are separated by a second partition plate 303; a biological activated carbon filter material is arranged in the carbon filtering area 301; a second weir 304 is vertically arranged in the middle of the water outlet stable flow area 302, a bottom water outlet 305 communicating the carbon filtering area 301 with the water outlet stable flow area 302 is formed in the bottom of a second partition plate 303 on the inner side of the second weir 304, and a water outlet gate 306 is arranged on the bottom water outlet 305; a water outlet is arranged at the bottom of the side wall of the water outlet steady flow area 302 at the outer side of the second water weir 304 and is communicated with a water outlet pipe 307;
the water outlet at the upper part of the buffering and backwashing water tank 2 is communicated with the water inlet of the carbon filtering area 301 with a second water inlet gate 308; the water outlet at the bottom of the buffering and backwashing water tank 2 is communicated with the bottom of the carbon filtering area 301 through a second water backwashing pump 8 for water backwashing.
In a preferred embodiment of this embodiment, the bottom of the char filtration zone 301 is further communicated with a gas back flushing pipe 10 with a third valve 9 for gas flushing.
As a preferable scheme of the embodiment, the ozone/ceramic membrane online chemical washing device further comprises a chemical dissolving barrel 11, and the chemical dissolving barrel 11 is communicated with a plurality of ozone/ceramic membrane assemblies 108 which are grouped and connected in parallel through a chemical adding pump 12 and a second valve 7 to perform online chemical washing.
As a preferable scheme of the embodiment, the sludge at the bottom of the ozone/ceramic membrane filtering area 102 is discharged through a sludge discharge pump 13, and the sludge discharge pump 13 is communicated with the sludge conveying pipe 14. The sludge discharge pump 13 conveys the sludge settled at the bottom of the tank to a sludge storage tank for treatment by a pumping mode at regular intervals.
As a preferable scheme of this embodiment, the SS online detector 15 and the COD online detector 16 are installed on the water inlet pipe 106; a liquid level meter 17 and an SS online detector 15 are arranged on the ozone/ceramic membrane filtering area 102; a pressure gauge 18 is mounted on the conduit between the ozone/ceramic membrane module 108 and the first valve 4; a flow meter 19 is arranged on a pipeline between the suction pump 5 and the buffer and backwashing water tank 2; a liquid level meter 17 is arranged on the buffering and backwashing water tank 2; the carbon filtration zone 301 is provided with a liquid level gauge 17. The automatic control is realized.
In this embodiment, SS refers to suspended particulate matter, and COD refers to chemical oxygen demand.
In this embodiment, the suction pump 5 is disposed on the water collecting main pipe, which is an important driving force for the ozone/ceramic membrane pool 1 to discharge water to the buffer and backwashing water pool 2.
In the embodiment, the design volume of the buffer and back-flushing water tank 2 is required to meet the requirement of the water volume of the ozone/ceramic membrane component (108 and the biological activated carbon filter tank 3 which are back-flushed at one time, back-flushing pumps with the same function are interconnected through pipelines to realize mutual backup, a back-flushing pipe of the ozone/ceramic membrane tank 1 is connected to the front of a suction pipeline suction pump 5, the back-flushing pipe of the biological activated carbon filter tank 3 is directly communicated with the bottom of the filter tank, the buffer and back-flushing water tank 2 is communicated with the biological activated carbon filter tank through the pipelines, a water distribution channel is arranged on one side of the filter tank to uniformly distribute water for the filter tank, and when the liquid level of the buffer and back-flushing water tank 2 reaches a certain height, the liquid level uniformly overflows to the biological activated carbon filter tank 3 through a communicating pipe and a water distribution channel.
In this embodiment, a nine-slit long-handle filter head is embedded in the supporting plate of the biological activated carbon filter 3 to uniformly distribute air and water. The flow rate of the single filter head is 0.2m3/h。
In this embodiment, when the ozone/ceramic membrane tank 1 is turned on again after being stopped every time, the backwashing is performed first, and then the normal filtration is performed.
In this embodiment, the first valve 4, the second valve 7 and the third valve 9 are all pneumatic butterfly valves.
In this embodiment, the carbon filtering zone 301 of the biological activated carbon filter 3 is provided with a flap valve 309 on one side of the wall of the tank. The backwashing wastewater of the biological activated carbon filter 3 is discharged through a flap valve 309 arranged on one side of the wall of the filter. Flap valve 309 is covered with a perforated plate screen to prevent loss of activated carbon.
In the embodiment, the bottom of the ozone/ceramic membrane pool 1 is provided with a slope with the i being 0.05, and is provided with the perforated mud pipe 109 with holes opened at 45 degrees in a staggered manner, the hole diameter is phi 10 mm-phi 20mm, and the distance is 400-phi 600 mm. The end of the sludge discharge pipe 109 is directly connected with the sludge discharge pump 13.
Example 2:
the utility model discloses still protect the technology of sewage advanced treatment to the accurate IV class quality of water of earth's surface, this technology adopts the device of sewage advanced treatment to the accurate IV class quality of water of earth's surface in the embodiment 1.
Specifically, the process comprises the following steps:
step 1, sewage flows into an ozone/ceramic membrane pool 1 by gravity, and pollutants in the water are in full contact with ozone and hydroxyl radicals generated by catalysis of a ceramic membrane and react in an ozone/ceramic membrane filtering area 102, the surface of the ceramic membrane and pores of the ceramic membrane;
step 4, after the suction pump 5 of the ozone/ceramic membrane pool 1 works for a set time, the ozone/ceramic membrane pool 5 enters a back washing state, and back washing water comes from the buffer and back washing water pool 2; after the biological activated carbon filter 3 works for a set time, the biological activated carbon filter 3 also enters a backwashing state, the backwashing of the biological activated carbon filter 3 adopts a gas-water combined flushing mode, backwashing water comes from the buffering and backwashing water tank 2, and backwashing gas comes from the blower room.
In the step 1, ozone comes from an ozone generator, and an air source of the ozone generator adopts an air source, an oxygen-enriched source or a liquid oxygen source;
in the step 1, an air dispersing stand is arranged at the lower part of the ozone/ceramic membrane component 108 at the bottom of the ozone/ceramic membrane pool 1, and ozone is distributed through micropores of a titanium aeration rod arranged on the air dispersing stand at the bottom of the ozone/ceramic membrane pool. The air diffuser table is rectangular and made of 316 stainless steel, so that air distribution is uniform, and good levelness of the air diffuser table is guaranteed during installation. 10-20 titanium aeration rods are arranged on a single air dispersing stand, and the specific number is determined according to the air demand. The titanium aeration rods are connected into a ring shape through the gas distribution branch pipes and then connected with the gas distribution main pipe.
In step 1, alpha-Al is used as the ceramic film2O3The effective filtration area of the flat membrane is 0.5m2The transmembrane pressure TMP is +/-60 kPa, the nominal pore diameter of the membrane is 0.1um, and not less than 95 percent of 0.1um standard particles can be removed. The ceramic membrane is combined into a membrane component through a membrane frame, a water collecting pipe and other accessory parts which are matched with the ceramic membrane. Specifically, the membrane is arranged on the membrane frame and is connected with the transverse water collecting pipe in a loose joint mode through a water collecting hose made of light nylon materials to form a set of assembly; the two sets of assemblies are stacked up and down and then the water collecting transverse pipe is connected through the water collecting vertical pipe to form a complete membrane assembly, and the tail end of the water collecting vertical pipe is connected with a 316 stainless steel water collecting hose and finally connected to the water collecting main pipe. The complete membrane assembly is arranged at the upper part of the air dispersing stand, and the dispersed ozone scrubs the surface of the membrane so as to reduce the membrane blockage and the membrane pollution.
In the step 1, the contact reaction time of ozone and pollutants is 1-2 h, and the adding amount of ozone is 5-25 mg/L.
In the step 1, the top cover plate, the manhole and various embedded pipes of the ozone/ceramic membrane pool 1 are sealed by glass fiber reinforced plastic cover plates, and a tail gas destructor is arranged to prevent residual ozone from escaping to influence the environment and human health.
In the step 3, the biological activated carbon filter 3 adopts a downward flow mode, the designed filtering speed is 6-10m/h, and the empty bed retention time is 20-50 min.
In the step 3, the biological activated carbon filter material in the biological activated carbon filter 3 adopts a double-layer filter material of a supporting layer and a carbon filter layer, wherein the supporting layer adopts a graded cobble filter material which is divided into three levels of 8-16 mm, 4-8 mm and 2-4 mm, and the thickness of the filter layer is 0.1 m; the carbon filter layer adopts a shell activated carbon filter material, the particle size is 1.0-1.5 mm, the thickness of the filter layer is 1.5m, and the bulk density is less than or equal to 450kg/m3The iodine value of the activated carbon is more than or equal to 800 mg/g.
In step 3, the biological activated carbon filter 3 adopts a downward flow mode, and sewage sequentially passes through a carbon filter layer and a supporting layer of the filter, is collected by a long-handle filter head arranged on the supporting plate and then enters the effluent stable area 302. The active carbon has powerful specific surface and porous structure to adsorb pollutant and degrade pollutant with biomembrane enriched on the surface of the filtering material, and the active carbon may be regenerated through the biodegradation of the membrane surface.
In the step 4, the back flushing time of the ozone/ceramic membrane pool 1 and the biological activated carbon filter pool 3 is carried out according to a set program, and water sources of the ozone/ceramic membrane pool and the biological activated carbon filter pool are from the buffer and back flushing water pool 2.
In the step 4, the backwashing process of the biological activated carbon filter 3 adopts a gas-water combined flushing mode, namely gas washing, gas-water combined washing and water washing, and the backwashing period is carried out according to a set program. The air source of the air purge comes from a blower, and the blower adopts a Roots blower. Further, the air-water combined flushing mode, namely air washing, air-water combined washing and water washing, is carried out for 5min, 4-6 min and 3min respectively, and the air washing strength is 16L/(m)2S) washing strength of 7L/(m)2S). The back washing period is 1 time/day, and the expansion rate of the filter layer is controlled to be less than or equal to 5 percent in the back washing process.
As a membrane separation and filtration technology, membrane pollution and filter material blockage are common problems, and corresponding backwashing is also a necessary link. The method of the embodiment also comprises a ceramic membrane cleaning method, wherein the ceramic membrane cleaning method comprises online backwashing, online chemical washing and offline cleaning.
And (3) online backwashing: the operation is carried out according to a set program, and when the suction pump 5 runs for a set time, the on-line backwashing state is started; in this embodiment, the set time is preferably 29 min. The backwashing time was 1 min.
And (3) online medicine washing: when the reading of the pressure gauge of the suction pipeline of the ozone/ceramic membrane pool exceeds a set alarm limit value, the system gives an alarm prompt, namely, the operation needs to be stopped, and the online medicine washing state is entered. Typical agents employ 0.2 wt.% to 0.5 wt.% H2O2The method comprises four steps of dispensing, dosing, standing and water backwashing.
Off-line medicine washing: depending on the contamination of the ceramic membrane. When the flux of the ceramic membrane can not be recovered through on-line drug washing, off-line drug washing needs to be carried out, and the specific method comprises the following steps:
1) alkali washing: 800-1500 ppm NaClO, 0.2 wt.% to 0.8 wt.% NaOH; soaking for 5-10 h; removing biological pollution, colloid pollution and most organic pollutants such as grease, protein, algae and the like;
2) acid washing: 0.2 wt.% to 0.8 wt.% HCl; soaking for 5-10 h; washing the inorganic substance to convert a part of insoluble substances in the pollutants into soluble substances;
3) washing with water: clear water; 0.5-1.5 h; washing residual alkali liquor, acid liquor and eluted pollutants.
The method of the embodiment further comprises an automatic control method, and the method comprises the following steps: monitoring two indexes of SS and COD, realizing by an online detector, and respectively setting corresponding alarm thresholds; when the inlet water SS is more than or equal to SSLimit ofThen, alarming to prompt the adjustment of the front-end process; when the influent COD is more than or equal to the CODLimit ofIn time, an alarm is given to prompt the increase of the ozone dosage so as to degrade COD and slow down membrane blockage.
In this embodiment, the ceramic membrane is subjected to liquid level control during normal filtration.
In this embodiment, the device for advanced treatment of sewage to surface level IV water quality is a constant flow control system.
In this embodiment, the on-line chemical washing of the ceramic membrane is controlled according to an alarm threshold of a pressure gauge of the suction pipeline. When the pressure is more than or equal to PLimit ofAnd when the water is produced, the system gives an alarm to prompt, stops producing water and enters an online medicine washing program.
In this embodiment, the sludge discharge of the ozone/ceramic membrane tank is controlled by the height of the bottom sludge bed, and H is set respectivelyMud heightAnd HMud contentWhen it is in a mud bed HMud bed＝HMud heightWhen the sludge pump 13 is started, the sludge pump is automatically started until HMud bed＝HMud contentAt this time, the sludge pump 13 is automatically stopped. Preferably, HMud height＝300mm，HMud content＝50mm。
Through the implementation of the utility model, the effluent quality completely meets the standard of surface standard IV water quality, wherein COD is less than or equal to 30mg/L, NH3N is less than or equal to 1.5mg/L, and the other indexes all meet the GB18918-2002 first-class A standard. Example specific operating data are shown in table 1.
Table 1 example run data units: mg/L
Claims (8)
1. A device for advanced treatment of sewage to surface quasi-IV water quality is characterized by comprising an ozone/ceramic membrane pool (1), a buffer and back flush water pool (2) and a biological activated carbon filter pool (3);
the ozone/ceramic membrane pool (1) comprises a water inlet area (101) and an ozone/ceramic membrane filtering area (102), wherein the top of the water inlet area (101) is closed, the top of the ozone/ceramic membrane filtering area (102) is closed, and the water inlet area (101) and the ozone/ceramic membrane filtering area (102) are separated by a first partition plate (103); a first water weir (104) is vertically arranged in the middle of the water inlet area (101), a water inlet with a first water inlet gate (105) is arranged at the bottom of the side wall of the water inlet area (101) at the outer side of the first water weir (104), and the water inlet with the first water inlet gate (105) is communicated with a water inlet pipe (106); the bottom of the first clapboard (103) at the inner side of the first weir (104) is provided with a bottom water inlet hole (107) which is communicated with the water inlet area (101) and the ozone/ceramic membrane filtering area (102);
a plurality of ozone/ceramic membrane modules (108) are arranged in the ozone/ceramic membrane filtering area (102), a plurality of ceramic membranes are arranged in each ozone/ceramic membrane module (108), and each ozone/ceramic membrane module (108) provides ozone through an ozone generator;
the ozone/ceramic membrane assemblies (108) are connected in parallel in groups and then are respectively communicated with a water inlet at the upper part of the buffering and backwashing water tank (2) through a first valve (4) and a suction pump (5); the water outlet at the bottom of the buffering and backwashing water tank (2) is communicated with a plurality of ozone/ceramic membrane assemblies (108) which are grouped and connected in parallel through a first water backwashing pump (6) and a second valve (7) for water backwashing;
the biological activated carbon filter (3) comprises a carbon filtering area (301) and a water outlet stable flow area (302), the top of the carbon filtering area (301) is closed, the top of the water outlet stable flow area (302) is closed, and the carbon filtering area (301) and the water outlet stable flow area (302) are separated by a second partition plate (303); a biological activated carbon filter material is arranged in the carbon filtering area (301); a second weir (304) is vertically arranged in the middle of the water outlet stable flow area (302), a bottom water outlet hole (305) communicated with the carbon filtering area (301) and the water outlet stable flow area (302) is formed in the bottom of a second partition plate (303) on the inner side of the second weir (304), and a water outlet gate (306) is arranged on the bottom water outlet hole (305); a water outlet is arranged at the bottom of the side wall of the water outlet steady flow area (302) at the outer side of the second water weir (304), and is communicated with a water outlet pipe (307);
a water outlet at the upper part of the buffering and backwashing water tank (2) is communicated with a water inlet with a second water inlet gate (308) at the upper part of the carbon filtering area (301); the water outlet at the bottom of the buffering and backwashing water tank (2) is communicated with the bottom of the carbon filtering area (301) through a second water backwashing pump (8) for water backwashing.
2. The device for the advanced treatment of sewage to the surface level of IV water quality as claimed in claim 1, wherein the bottom of the carbon filtering area (301) is also communicated with an air back-flushing pipe (10) with a third valve (9) for air flushing.
3. The device for deeply treating sewage to surface quasi-IV water quality according to claim 1, further comprising a medicine dissolving barrel (11), wherein the medicine dissolving barrel (11) is communicated with a plurality of ozone/ceramic membrane assemblies (108) which are grouped and connected in parallel through a medicine adding pump (12) and a second valve (7) to carry out on-line medicine washing.
4. The apparatus for advanced wastewater treatment to surface level IV water quality as claimed in claim 1, wherein the sludge at the bottom of the ozone/ceramic membrane filtration zone (102) is discharged by a sludge discharge pump (13), and the sludge discharge pump (13) is communicated with the sludge delivery pipe (14).
5. The device for deeply treating sewage to surface level IV water quality according to claim 1, wherein the water inlet pipe (106) is provided with an SS online detector (15) and a COD online detector (16); a liquid level meter (17) and an SS online detector (15) are arranged on the ozone/ceramic membrane filtering area (102); a pressure gauge (18) is arranged on a pipeline between the ozone/ceramic membrane assembly (108) and the first valve (4); a flow meter (19) is arranged on a pipeline between the suction pump (5) and the buffer and back washing water tank (2); a liquid level meter (17) is arranged on the buffering and backwashing water tank (2); and a liquid level meter (17) is arranged on the carbon filtering area (301).
6. The device for the advanced treatment of sewage to the surface level of IV water quality as claimed in claim 1, wherein the carbon filtering area (301) of the biological activated carbon filter (3) is provided with a flap valve (309) at one side of the wall of the filter.
7. The device for deeply treating sewage to surface level IV water quality according to claim 1, wherein the first valve (4), the second valve (7) and the third valve (9) are all pneumatic butterfly valves.
8. The apparatus of claim 1, wherein the ceramic membrane is alpha-Al, and the apparatus is for advanced treatment of wastewater to surface standard class IV water quality2O3Flat sheet membrane of material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122385667.6U CN216005565U (en) | 2021-09-29 | 2021-09-29 | Device for advanced treatment of sewage to surface of earth and quasi-IV-class water quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122385667.6U CN216005565U (en) | 2021-09-29 | 2021-09-29 | Device for advanced treatment of sewage to surface of earth and quasi-IV-class water quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216005565U true CN216005565U (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122385667.6U Active CN216005565U (en) | 2021-09-29 | 2021-09-29 | Device for advanced treatment of sewage to surface of earth and quasi-IV-class water quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216005565U (en) |
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2021
- 2021-09-29 CN CN202122385667.6U patent/CN216005565U/en active Active
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