CN102531160B - Sequencing Batch Membrane Bioreactor (SBMBR) reclaimed water recycling device - Google Patents
Sequencing Batch Membrane Bioreactor (SBMBR) reclaimed water recycling device Download PDFInfo
- Publication number
- CN102531160B CN102531160B CN201210029540.3A CN201210029540A CN102531160B CN 102531160 B CN102531160 B CN 102531160B CN 201210029540 A CN201210029540 A CN 201210029540A CN 102531160 B CN102531160 B CN 102531160B
- Authority
- CN
- China
- Prior art keywords
- water
- water tank
- membrane
- aeration
- sbr
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 213
- 239000012528 membrane Substances 0.000 title claims abstract description 85
- 238000004064 recycling Methods 0.000 title claims abstract description 21
- 238000012163 sequencing technique Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 52
- 238000005273 aeration Methods 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 27
- 238000006065 biodegradation reaction Methods 0.000 claims abstract description 5
- 239000002957 persistent organic pollutant Substances 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000011001 backwashing Methods 0.000 claims abstract description 3
- 238000011010 flushing procedure Methods 0.000 claims description 16
- 239000010802 sludge Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 238000006731 degradation reaction Methods 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 230000026676 system process Effects 0.000 claims description 4
- 239000010963 304 stainless steel Substances 0.000 claims description 3
- 208000032843 Hemorrhage Diseases 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 208000034158 bleeding Diseases 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000011109 contamination Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000004904 shortening Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005842 biochemical reaction Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 14
- 239000011574 phosphorus Substances 0.000 abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 239000010865 sewage Substances 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 229910002651 NO3 Inorganic materials 0.000 description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 2
- 229920000037 Polyproline Polymers 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000001205 polyphosphate Substances 0.000 description 2
- 235000011176 polyphosphates Nutrition 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920013639 polyalphaolefin Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A reclaimed water recycling device of a Sequencing Batch Membrane Bioreactor (SBMBR) consists of five main parts, namely two identical SBR reaction water tanks, a membrane bioreactor tank, a reclaimed water tank, a pipeline system and a PLC automatic control system. Performing biodegradation reaction on raw water by adopting a sequencing batch operation process method in an SBR reaction water tank to remove organic pollutants and nitrogen and phosphorus, placing two membrane components in a membrane biological reaction tank, performing biodegradation treatment further and discharging water; the reclaimed water tank is used for storing the reclaimed water obtained by treatment and providing required water for backwashing; the pipeline system comprises manual and electric valves, pumps, flowmeters and other equipment and is responsible for water inlet, SBR water outlet, MBR membrane pumped water outlet and aeration of the whole process system; the automatic control system mainly controls the normal operation and stop of the whole system device and comprises a PLC electric control cabinet, an electric contact vacuum pressure gauge, a liquid level controller and the like.
Description
Technical field
The present invention relates to water treatment device in one, water recycling device in especially a kind of sequencing batch membrane bioreactor (SBMBR).
Background technology
In what is called, water refers to sanitary sewage after treatment, reaches the water quality standard of regulation, reusable undrinkable water within the specific limits, the water such as cooling in lavatory flushing, green land irrigation, City Landscape Environment, agricultural, factory, carwash.The most typical representative of middle water reuse is Japan.In China, water reuse starts to walk relatively evening, and within 1985, Beijing Environmental Protection Science Research Inst. has built up Section 1 mid-water engineering in institute.The common small scale of middle water technology, technology is high, expense is expensive, and it requires high-caliber processing, independently water distribution system, special user pipe, gate system and skilled operation.
Membrane bioreactor (Membrane Bioreactor, MBR) is in recent years emerging wastewater treatment and reuse technology, and this technology is that membrane separation technique and traditional wastewater biologic treating technique are organically combined and the new process for treating waste water of generation.MBR technology is by water reuse from traditional wastewater processing is extended to.Effect difference according to membrane module in membrane bioreactor, can be divided into solid-liquid separation membrane bioreactor, aeration film bio-reactor and extractive membrane biological reactors three major types.What this technology adopted is solid-liquid separation membrane bioreactor.SBR is the abbreviation of sequencing batch reactor (Sequencing Batch Reactor Activated Sludge Process), be a kind of active sludge sewage disposal technology moving by intermittent aeration mode, claim again sequencing batch active sludge.A complete operating process of SBR technique, that is the operating process of each batch reactor in the time processing waste water comprises following 5 stages: the water inlet phase; Reaction period; The precipitation phase; The draining spoil disposal phase; Lay-up period.SBMBR combines SBR with MBR, retained both advantages, has improved the ability of system denitrogenation dephosphorizing.PLC is a kind of electronic installation operating for the digital operation that application designs under industrial environment specially.Have that reliability is high, superior performance, the advantage such as easy to use, it is used widely at the aspect such as industry automatic control, electromechanical integration, be one of three large technology pillars of industrial automation.
At water treatment field, sequencing batch membrane bioreactor (SBMBR) more and more comes into one's own as the principal facility of middle water treatment in community.This technology utilizes programmable logic controller (PLC) to design middle water recycling device automatic control system, has realized the automatization control of centering water recycling device.Along with the development of membrane technique, membrane technique has been penetrated into the every field of sewage disposal, and except can be separately for sewage disposal, be mostly the insoluble problems of traditional method that solve of being combined with other various technique.Sequencing batch membrane bioreactor (SBMBR) technique is a kind of Novel sewage treatment technology being combined by sequencing batch active sludge (SBR) and membrane bioreactor (MBR), conventionally move in the mode of anoxic one good oxygen cycle, can in same reactor, realize nitrification and denitrification, SBMBR has good while Nitrogen/Phosphorus Removal.Middle water recycling device SBMBR system non-stop run meeting aggravation film pollutes speed, causes membrane flux to decline, and therefore just requires suction pump discontinuous operation.Programmable logic controller (Program Logical Controller, PLC) is a kind of electronic installation operating for the digital operation that application designs under industrial environment specially.Have that reliability is high, superior performance, the advantage such as easy to use.Water recycling device application automatic technology in SBMBR, utilize the function such as PLC timing control, counting control to meet the requirements for automatic control to SBMBR intermediate water reuse system, adopt the operation scheme of sequence batch (to carry out the denitrogenation dephosphorizing performance of reinforced film biological reactor, make its combination process SBMBR not only simple to operate, be convenient to automatization control, effluent quality is safe and reliable, and realize denitrification and phosphorus removal integration, and can fully effectively remove nitrogen, phosphorus and organic substance simultaneously, reach middle water reuse standard.Automatic equipment taking PLC as core can make system fully automatic operation non-maintaining in the situation that, realizes suction pump discontinuous operation, decelerating membrane pollution.
The same with traditional activated sludge process, the aerobic MBR technique based on activated sludge process can effectively be removed organic pollutant, and nitrification is strong and a little less than denitrification, therefore denitrogenation dephosphorizing efficiency is not high.Improve its denitrogenation dephosphorizing effect, conventionally the method adopting is to combine with denitrification dephosphorization technique, but this MBR treatment system long flow path, HRT is long, energy consumption is high, therefore, that explores a kind of short flow process, less energy-consumption can remove organism and nitrogen, phosphorus simultaneously, and the novel MBR technique that its water outlet can direct reuse is just seemed highly significant.Combination process SBMBR, taking middle water reuse as object, by by the treatment process of sequencing batch active sludge and membrane bioreactor combination, forms double-reactor SBMBR system, strengthening SBMBR denitrification and denitrogenation dephosphorizing ability.
In biological denitrification phosphorous removal technique, there is contradiction.Mud problem in age, nitrifier is as the main body of nitrifying process, and this quasi-microorganism belongs to autotrophic type obligate aerobic bacteria, and reproduction speed is slow, and generation time is long, and the mud needing is long age, and polyP bacteria mostly is short generation microorganism, the mud of needs is short age.Nitrate problem, returned sluge inevitably takes nitrate in upper level reactor, and what phosphorus bacterium was released in the existence of nitrate impact releases phosphorus efficiency, even can cause polyP bacteria directly to inhale phosphorus.In SBMBR, water recycling device adopts the operation scheme of double-reactor, MBR reactor is because film crown_interception can extend the sludge retention time (SRT) of bio-reactor, microorganism in reactor can increase to greatest extent, be beneficial to the growth and breeding of long nitrated and nitrite bacteria generation time, therefore the biological activity of mud is high, reduce sludge yield, the ability of absorption and degradation of organic substances is stronger, also has good nitrification ability simultaneously.In addition, condition has been created in the growth that the operation scheme of SBR formula is dephosphorization bacterial, has also met the needs of denitrogenation simultaneously, and making to realize efficient nitrogen, phosphorus and the organism removed simultaneously in single reaction vessel becomes possibility.When high sludge concentration ensures phosphor-removing effect, improve nitrated and organic matter removal ability.In SBMBR the MBR reactor of water recycling device be divided into anoxic section become reconciled support section, returned sluge is back to sbr reactor device from anoxic section, the nitrate that in anoxic pond, returned sluge carries utilizes carbon source denitrification, thereby can be that the phosphorus bacterium of releasing in sbr reactor device is fully released phosphorus.
Exploitation is applicable to cities and towns, the middle water recovering process equipment that community and hotel are used, and how making limited spatial manipulation scale reach maximum becomes a difficult problem of middle water reuse.Water recycling device system layout compactness in SBMBR, technical process is short, and floor space is little, and the cities and towns, community and the hotel that are applicable to the medium treatment scale of limited space are used.In SBMBR, water recycling device utilizes membrane sepn draining in step of reaction, does not need to arrange secondary sedimentation basins, can reduce the cycling time of traditional SBR.
Summary of the invention
Prior-art devices complicated operation, system property safe and reliable to operation is low.In SBMBR, water recycling device is for the Controlling System cycle of operation, automatic operation and the outlet effect of safeguards system, the security of strengthening system, utilize the function such as PLC timing control, counting control, have that reliability is high, superior performance, easy to operate, meet requirements for automatic control to SBMBR Sewage treatment systems, the application to water recycling device in SBMBR and promote significant.
One of object of the present invention is achieved through the following technical solutions:
Water recycling device is by two identical sbr reactor water tanks in this, membrane biological reaction case, middle water tank, five major portions compositions of piping system and PLC automatic control system.Adopt in sbr reactor water tank sequence batch (operating procedure method to carry out bio-degradation reactions to former water, remove organic pollutant and denitrogenation dephosphorizing, place two membrane modules in membrane biological reaction case, further biological degradation is processed and is carried out water outlet; Middle water tank is used for the middle water of stores processor gained, and provides required water for back flushing; Piping system comprises the equipment such as manual and electrically operated valve, pump and under meter, is responsible for the aeration of water inlet, SBR water outlet, the suction water outlet of MBR film and whole process system; The normal operation of automatic control system major control whole system device and stopping, comprising PLC electrical control cubicles, electric contact vacuum pressure gauge, fluid level controller etc.
Because the cost of mineral membrane is relatively high, at present, the film that is widely used in wastewater treatment is mainly made up of organic polymer material, as polyolefins, polyethylene kind, aromatic polyamide, poly-fluoropolymer etc.The mould material that is applied to MBR needs existing good film-forming properties, thermostability, chemical stability, has again higher water flux and good contamination resistance simultaneously, and it is low that unit sees through liquid energy consumption cost, and unit volume membrane area is large.That the principal mode of hyperfiltration membrane assembly has is flat, tubular type, spiral, capillary type, rod formula and tubular fibre formula etc., wherein spiral all higher with packing density capillary type assembly, but because contamination resistance is poor, generally be not used in membrane bioreactor, at present multiplex tubular type, tubular fibre formula and plate type membrane assembly in membrane bioreactor.
It is the aperture of film that another point needs the factor of considering, because active sludge in aeration tank is to be made up of the microbe granular of assembling, wherein a part of pollutent is absorbed or sticks to the organic substance surface of microorganism flco and colloidal substance by microorganism, although the diameter of particle depends on concentration, admixture and the temperature condition of mud, these particles still exist certain regularity of distribution, Masaru Uehara research is thought and is considered active sludge state and water flux, preferably selects the film in 0.10～0.40 μ m aperture.
Adopt single piece type method of attachment, two films are placed side by side in water tank, hose connection to header, are provided with valve and can control the water outlet of each membrane module.
Controlling System hardware is made up of other accessories such as programmable logic controller, magnetic valve and motorized valve, fluid level controller, solid state relay, various switches.
SBMBR system process is: water intaking valve A1 opens, and the mixed solution refluxing in the former water after water pump lifting and membrane reactor enters sbr reactor device 1, and after liquid level is set in arrival, raw water pump stops, and A1 closes.Cycle starts, and stirs 90min, micro-aeration 30min, and aeration 120min realizes anaerobic/anoxic/aerobic environment replacing in sbr reactor device completely, and be 4h reaction time.After end cycle, outlet valve C1 opens, and SBR water outlet enters membrane reactor, and in membrane reactor, further degraded is thorough, and the crown_interception of membrane module can replace precipitation and the bleeding stage of SBR technique simultaneously, has saved the sbr reactor cycle.For shortening the period interval time of water outlet, ensure the processing water yield of system, SBR pond 2 is set and after half period is moved in pond 1, starts, both operational conditionss are identical.
For the ease of system operation and equipment repair and maintenance, native system is provided with " automatically " and " manually " two kinds of operation scheme.Under " automatically " mode, can change according to actual needs equipment working state and high water tank parameter.In system, the back flushing of film is the very effective measure that prevents that film from polluting, and is an important step of this Sewage treatment systems, and the effect of back flushing directly has influence on the water quality of film water outlet.Programming procedure has taken into full account the automatic control process to film back flushing.When electric contact vacuum meter reaches after the pressure setting, system enters back flushing state automatically.In programming procedure, take into full account uncontrollable sexual factor, be provided with MBR high water tank defence program.Can effectively prevent that the exposed and water of film from overflowing water tank.
Prior art is undesirable to wastewater treatment efficiency, is applied in and in Practical Project, has certain limitation.Double-reactor SBMBR work simplification traditional SBR technique, and adopt membrane filtration to replace second pond water outlet, obtained good pollutant removal, there is very strong denitrification dephosphorization denitrification ability, water reuse standard during telolemma effluent quality meets.The operation scheme that adopts SBR to be combined with MBR, can make the settling property of mixed solution in reactor keep good, and sludge activity is higher.By the concentration of reasonable control DO, to form anaerobic/anoxic/aerobic environment replacing in SBMBR system, for cultivation, the Growth and reproduction of various functional microorganisms provide adapt circumstance, strengthen its removal to nitrogen, phosphorus.The operational condition of sequence batch (and the combination of membrane biological reactor process, ensured that SBMBR system can stablize, remove efficiently ammonia nitrogen, and the structure setting of double-reactor has been strengthened the ability of anti-shock loading.The removal of phosphorus is mainly carried out in sbr reactor device, after its periodic reaction finishes, filters by membrane module the precipitate phase that replaces traditional sequence batch (technique, can avoid the impact of the phosphorus effect of again releasing on system dephosphorization treatment effect of PAOs.
Brief description of the drawings
Below in conjunction with accompanying drawing, specific embodiments of the invention are described in further detail.
Fig. 1 is the structure iron of membrane module
Fig. 2 is the logical flow chart of system
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment is only for the present invention is described, instead of in order to limit the scope of the invention.
Water recycling device is by two identical sbr reactor water tanks in this, membrane biological reaction case, middle water tank, five major portions compositions of piping system and PLC automatic control system.Adopt in sbr reactor water tank sequence batch (operating procedure method to carry out bio-degradation reactions to former water, remove organic pollutant and denitrogenation dephosphorizing, place two membrane modules in membrane biological reaction case, further biological degradation is processed and is carried out water outlet; Middle water tank is used for the middle water of stores processor gained, and provides required water for back flushing; Piping system comprises the equipment such as manual and electrically operated valve, pump and under meter, is responsible for the aeration of water inlet, SBR water outlet, the suction water outlet of MBR film and whole process system; The normal operation of automatic control system major control whole system device and stopping, comprising PLC electrical control cubicles, electric contact vacuum pressure gauge, fluid level controller etc.
The right cylinder casing that sbr reactor case is taper by bottom and support and stirrer form, the high 750mm of support, casing height overall 1100mm, diameter 600mm, the high 150mm of bottom taper bucket.Apart from casing top, 50mm place establishes overflow weir, and 500mm place sets out penstock, and for the water outlet through periodic reaction in SBR is entered to MBR reactor, water-in is located at bottom half.
Stirrer is fixed on the top of casing, starts the mixing completely that ensures muddy water at anaerobic stages.MBR reaction box is made up of the 304 stainless steel welding of 0.9mm thickness, dimensions is 1.2m × 0.8rm × 1.3m (L × W × H), central bottom installs the highly dividing plate for 0.6m additional, and top installs the high detachable dividing plate of 0.5m additional, and reaction box is divided into 0.7m and two parts of 0.5m.The former places MBR membrane module, and the latter is as buffer strip, prevent from, into the impact of water, MBR membrane module is produced to detrimentally affect, and can be as the case may be filled or take different process.At the bottom of reaction box, there is respectively the water shoot of DN500 both sides, the blowdown while being used for carrying out spoil disposal or cleaning reaction case.
Mainly sending a signal to PLC according to the liquid bit position in reactor carries out system control, in the time that liquid level is lower than low liquid level in sbr reactor device, can realize automatic feeding water, until reach high liquid level; Lower than the lowest safe waterline (diaphragm surfaces) of film or while exceeding the highest safety level (overflow), system will be out of service.
Airing system is provided with film stripping and the two-way aerating system for SBR dissolved oxygen, and SBR aeration and film stripping are used respectively two air pumps, and air feed form is respectively perforated pipe and micro-pore aeration.Boring aeration pipe is placed in MBR water tank membrane module bottom, reach the object that controlling diaphragm pollutes, microporous aeration disc is placed in sbr reactor device bottom, the main required dissolved oxygen of biochemical degradation process of supplying with, external two magnetic valves that pipe diameter size is different, start in anoxic and aerobic stage respectively, the aeration rate of different sizes is provided, device all has gas meter to regulate aeration rate.
Middle water tank is stainless steel, and water discharging valve is arranged at specification 1.0m × 0.5m × 0.3m (L × W × H) bottom.System operation adopts the programmable logic controller (FX2N-32-MR001) of the FX-2N series 32 point relay outputs of Mitsubishi to control.Adopt electro connecting pressure gauge to read mould poor (Trans Membrane Pressure, TMP), range ability 0～0.100MPa.
In this, water recycling device membrane module is selected the MBR-8 type trilamellar membrane assembly that Zhejiang Kai Hong film company limited produces, and film is external pressure type hollow fiber ultra-filtration membrane, and material is polypropylene, design parameter:
Adopt single piece type method of attachment, two films are placed side by side in water tank, hose connection to header, are provided with valve and can control the water outlet of each membrane module.The outward appearance of membrane module and size are as shown in the figure.
The right cylinder casing that sbr reactor case is taper by bottom and support and stirrer form, the high 750mm of support, casing height overall 1100mm, diameter 600mm, the high 150mm of bottom taper bucket.Apart from casing top, 50mm place establishes overflow weir, and 500mm place sets out penstock, and for the water outlet through periodic reaction in SBR is entered to MBR reactor, water-in is located at bottom half.Stirrer is fixed on the top of casing, starts the mixing completely that ensures muddy water at anaerobic stages.
MBR reaction box is made up of the 304 stainless steel welding of 0.9mm thickness, dimensions is 1.2m × 0.8m × 1.3m (L × W × H), central bottom installs the highly dividing plate for 0.6m additional, and top installs the high detachable dividing plate of 0.5m additional, and reaction box is divided into 0.7m and two parts of 0.5m.The former places MBR membrane module, and the latter is as buffer strip, prevent from, into the impact of water, MBR membrane module is produced to detrimentally affect, and can be as the case may be filled or take different process.At the bottom of reaction box, there is respectively the water shoot of DN500 both sides, the blowdown while being used for carrying out spoil disposal or cleaning reaction case.
Fluid level controller mainly sends a signal to PLC according to the liquid bit position in reactor and carries out system control, in the time that liquid level is lower than low liquid level in sbr reactor device, can realize automatic feeding water, until reach high liquid level; Lower than the lowest safe waterline (diaphragm surfaces) of film or while exceeding the highest safety level (overflow), system will be out of service.
Airing system is provided with film stripping and the two-way aerating system for SBR dissolved oxygen, and SBR aeration and film stripping are used respectively two air pumps, and air feed form is respectively perforated pipe and micro-pore aeration.Boring aeration pipe is placed in MBR water tank membrane module bottom, reach the object that controlling diaphragm pollutes, microporous aeration disc is placed in sbr reactor device bottom, the main required dissolved oxygen of biochemical degradation process of supplying with, external two magnetic valves that pipe diameter size is different, start in anoxic and aerobic stage respectively, the aeration rate of different sizes is provided, device all has gas meter to regulate aeration rate.
Middle water tank is stainless steel, water discharging valve is arranged at specification 1.0m × 0.5m × 0.3m (L × W × H) bottom, system operation adopts the programmable logic controller (FX2N-32-MR001) of the FX-2N series 32 point relay outputs of Mitsubishi to control, adopt electro connecting pressure gauge to read mould poor, range ability 0～0.100MPa.
Controlling System hardware is made up of other accessories such as programmable logic controller, magnetic valve and motorized valve, fluid level controller, solid state relay, various switches.
(1) sbr reactor device cycle operation mode: reactor has two, and each cycle of operation is 4h, when in No. 1 reactor, liquid level control gage detects liquid level lower than the low liquid level of setting, inlet valve, raw water pump and sludge reflux pump are opened; Reach while setting high liquid level and automatically close, stirrer starts simultaneously, after operation 90min, closes; Control the valve opening of micro-aeration of anaerobic stages simultaneously, after 30min, automatically close and control the valve opening of complete aeration, enter aerobic stage operation 120min; So far end cycle, outlet valve is opened, and reacted water enters MBR water tank, enters next cycle, circular flow in the time that water level is down to the low liquid level of setting.
(2) No. 2 sbr reactor device starts: be 2h No. 1 reactor periodic duty half period, when the complete aeration valve opening of micro-aeration valve closes of while, No. 2 reactor start-ups, cycle of operation pattern is identical with No. 1, timed interval half period (2h).
(3) water level control in sbr reactor case: in the time that liquidometer detects liquid level lower than setting Schwellenwert, raw water pump and the water inlet of returned sluge pump operation; Suction pump is out of service; Reach while setting high-water, automatically stop, No. 1 stirrer is opened simultaneously.
(4) suction pump work: stop than setting the suction pump open and close intermittent time according to required the taking out of reality.
(5) film cleans: in the time that electric contact vacuum meter detects that pressure rise arrives certain numerical value, electric contact is connected corresponding PLC contact, process through programmable logic controller (PLC), send a signal to respectively two groups of valves, A group is opened B group pass, realize back flushing, and now ultrasonic generator non-stop run is cleaned.Clean after the time of setting, A group pass B group is opened.Clean and finish, automatically enter normal operation,
SBMBR system process: water intaking valve A1 opens, and the mixed solution refluxing in the former water after water pump lifting and membrane reactor enters sbr reactor device 1, after liquid level is set in arrival, raw water pump stops, and A1 closes.Cycle starts, and stirs 90min, micro-aeration 30min, and aeration 120min realizes anaerobic/anoxic/aerobic environment replacing in sbr reactor device completely, and be 4h reaction time.After end cycle, outlet valve C1 opens, and SBR water outlet enters membrane reactor, and in membrane reactor, further degraded is thorough, and the crown_interception of membrane module can replace precipitation and the bleeding stage of SBR technique simultaneously, has saved the sbr reactor cycle.For shortening the period interval time of water outlet, ensure the processing water yield of system, SBR pond 2 is set and after half period is moved in pond 1, starts, both operational conditionss are identical.
Start button (RUN) is pressed, x0 connects, A group electrical ball valve is closed B group electrical ball valve and is opened, the startup time length that K300 sets A group, B group electrical ball valve is 30 seconds, after 30 seconds, suction pump is opened film is produced to suction negative pressure, move and close after 9 minutes, stop 3 minutes, now perform statement 32-54; Statement 56-62 is used for controlling the unlatching of No. 1 water tank water intake and No. 1 agitator, and x2, x3 connect respectively the low, high-order of No. 1 float ball for use in cistern liquidometer; No. 1 agitator is controlled by statement 67-87 working time, has used 6 periods, the timer of per period 900s, and be 1.5 hours No. 1 agitator working time; Statement 91-98 is used for controlling the micro-aeration process of water tank No. 1, and setting micro-aeration time is 0.5 hour.No. 1 water tank water intake finishes to control water tank water intake No. 2 by statement 102 after 2 hours, stirs working time and micro-aeration time and is controlled by statement 149-169,173-184 respectively.Statement 109-137 is for controlling the complete aeration time of No. 1 water tank, and setting complete aeration time is 2 hours; No. 1 water tank, after the biochemical reaction of 4 hours, is controlled its gravity drainage to MBR water tank by statement 141.No. 2 the complete aeration of water tank is controlled by statement 187-215, controls its water outlet by statement 219.
Statement 222-270 is membrane module back flushing setting, x11 connects electric contact vacuum meter, when film suction negative pressure reaches preheating setting pressure value, and continue more than 20 seconds, A group electrical ball valve is closed B group electrical ball valve and is opened, suction pump therefrom water tank is drawn water membrane module is carried out to back flushing, and setting backwashing time is 3 minutes.After back flushing finishes, reenter normal operating condition, so repeatedly.Program setting system protection program be used for preventing that the reasons such as element fault from causing loss.In the time that in MBR water tank, water level is in low-water level, set suction pump stop, preventing film exposed cause membrane flux decline; For preventing overflowing of water in MBR water tank, to set in the time that water level is positioned at high-water, system is out of service.
Claims (3)
1. water recycling device in a sequencing batch membrane bioreactor (SBMBR), it is characterized in that: in this, water recycling device is by two identical sbr reactor water tanks, membrane biological reaction case, middle water tank, five major portion compositions of piping system and PLC automatic control system, adopt in sbr reactor water tank sequence batch (operating procedure method to carry out bio-degradation reactions to former water, remove organic pollutant and denitrogenation dephosphorizing, place two membrane modules in membrane biological reaction case, further biological degradation is processed and is carried out water outlet, middle water tank is used for the middle water of stores processor gained, and provides required water for back flushing, piping system comprises manually and electrically operated valve, pump and under meter, is responsible for the aeration of water inlet, SBR water outlet, the suction water outlet of MBR film and whole process system, the normal operation of automatic control system major control whole system device and stopping, comprising PLC electrical control cubicles, electric contact vacuum pressure gauge, fluid level controller, system major equipment comprises: sbr reactor water tank, membrane biological reaction case, fluid level controller, aerating system, middle water tank, PLC, electric contact vacuum pressure gauge, the right cylinder casing that sbr reactor water tank is taper by bottom and support and stirrer form, the high 750mm of support, casing height overall 1100mm, diameter 600mm, the high 150mm of bottom taper bucket, apart from casing top, 50mm place establishes overflow weir, 500mm place sets out penstock, and for the water outlet through periodic reaction in SBR is entered to membrane biological reaction case, water-in is located at bottom half, stirrer is fixed on the top of casing, starts the mixing completely that ensures muddy water at anaerobic stages, membrane biological reaction case is made up of the 304 stainless steel welding of 0.9mm thickness, dimensions is 1.2m × 0.8m × 1.3m (L × W × H), central bottom installs the highly dividing plate for 0.6m additional, top installs the high detachable dividing plate of 0.5m additional, reaction box is divided into 0.7m and two parts of 0.5m, the former places MBR membrane module, the latter is as buffer strip, prevent from, into the impact of water, MBR membrane module is produced to detrimentally affect, and can be as the case may be filled or take different process, at the bottom of reaction box, there is respectively the water shoot of DN500 both sides, blowdown while being used for carrying out spoil disposal or cleaning reaction case, fluid level controller mainly sends a signal to PLC automatic control system according to the liquid bit position in reactor and carries out system control, in the time that liquid level is lower than low liquid level in sbr reactor water tank, can realize automatic feeding water, until reach high liquid level, lower than the lowest safe waterline of film or while exceeding the highest safety level, system will be out of service, middle water tank is stainless steel, water discharging valve is arranged at specification 1.0m × 0.5m × 0.3m (L × W × H) bottom, system operation adopts the programmable logic controller (FX2N-32-MR001) of the FX-2N series 32 point relay outputs of Mitsubishi to control, adopt electric contact vacuum pressure gauge to read, range ability 0～-0.100Mpa, airing system is provided with film stripping and the two-way aerating system for SBR dissolved oxygen, SBR aeration and film stripping are used respectively two air pumps, air feed form is respectively perforated pipe aerating regulation and micro-pore aeration, boring aeration pipe is placed in MBR water tank membrane module bottom, reach the object that controlling diaphragm pollutes, microporous aeration disc is placed in sbr reactor water tank bottom, the main required dissolved oxygen of biochemical degradation process of supplying with, external two magnetic valves that pipe diameter size is different, start in anoxic and aerobic stage respectively, the aeration rate of different sizes is provided, device all has gas meter to regulate aeration rate, the mould material of MBR needs existing good film-forming properties, thermostability, chemical stability, there are again higher water flux and good contamination resistance simultaneously, it is low that unit sees through liquid energy consumption cost, unit volume membrane area is large, commonly use tubular type, tubular fibre formula and plate type membrane assembly, often select the film in 0.10～0.40 μ m aperture.
2. water recycling device in sequencing batch membrane bioreactor as claimed in claim 1 (SBMBR), is characterized in that: Controlling System hardware is made up of programmable logic controller, magnetic valve and motorized valve, fluid level controller, solid state relay, various switch.
3. the system process of water recycling device in sequencing batch membrane bioreactor as claimed in claim 1 (SBMBR), it is characterized in that: (1) sbr reactor water tank cycle operation mode: reactor has two, each cycle of operation is 4h, when in No. 1 reactor, liquid level control gage detects liquid level lower than the low liquid level of setting, inlet valve, raw water pump and sludge reflux pump are opened; Reach while setting high liquid level and automatically close, stirrer starts simultaneously, after operation 90min, closes; Control the valve opening of micro-aeration of anaerobic stages simultaneously, after 30min, automatically close and control the valve opening of complete aeration, enter aerobic stage operation 120min; So far end cycle, outlet valve is opened, and reacted water enters MBR water tank, enters next cycle, circular flow in the time that water level is down to the low liquid level of setting;
(2) No. 2 sbr reactor water tank starts: be 2h No. 1 reactor periodic duty half period, when the complete aeration valve opening of micro-aeration valve closes of while, No. 2 reactor start-ups, cycle of operation pattern is identical with No. 1, timed interval half period (2h); (3) water level control in sbr reactor water tank: in the time that liquidometer detects liquid level lower than setting Schwellenwert, raw water pump and the water inlet of returned sluge pump operation; Suction pump is out of service; Reach while setting high-water, automatically stop, No. 1 stirrer is opened simultaneously; (4) suction pump work: stop than setting the suction pump open and close intermittent time according to required the taking out of reality; (5) film cleans: in the time that electric contact vacuum pressure gauge detects that pressure rise arrives certain numerical value, electric contact is connected corresponding PLC contact, process through programmable logic controller (PLC), send a signal to respectively two groups of valves, A group is opened B group pass, realize back flushing, and now ultrasonic generator non-stop run is cleaned; Clean after the time of setting, A group pass B group is opened; Clean and finish, automatically enter normal operation; SBMBR system process: water intaking valve A1 opens, and the mixed solution refluxing in the former water after water pump lifting and membrane reactor enters sbr reactor water tank 1, after liquid level is set in arrival, raw water pump stops, and A1 closes; Cycle starts, and stirs 90min, micro-aeration 30min, and aeration 120min realizes anaerobic/anoxic/aerobic environment replacing in sbr reactor water tank completely, and be 4h reaction time; After end cycle, outlet valve C1 opens, and SBR water outlet enters membrane reactor, and in membrane reactor, further degraded is thorough, and the crown_interception of membrane module can replace precipitation and the bleeding stage of SBR technique simultaneously, has saved the sbr reactor cycle; For shortening the period interval time of water outlet, ensure the processing water yield of system, SBR pond 2 is set and after half period is moved in pond 1, starts, both operational conditionss are identical; Start button (RUN) is pressed, x0 connects, A group electrical ball valve is closed B group electrical ball valve and is opened, the startup time length that K300 sets A group, B group electrical ball valve is 30 seconds, after 30 seconds, suction pump is opened film is produced to suction negative pressure, move and close after 9 minutes, stop 3 minutes, now perform statement 32-54; Statement 56-62 is used for controlling the unlatching of No. 1 water tank water intake and No. 1 agitator, and x2, x3 connect respectively the low, high-order of No. 1 float ball for use in cistern liquidometer; No. 1 agitator is controlled by statement 67-87 working time, has used 6 periods, the timer of per period 900s, and be 1.5 hours No. 1 agitator working time; Statement 91-98 is used for controlling the micro-aeration process of water tank No. 1, and setting micro-aeration time is 0.5 hour; No. 1 water tank water intake finishes to control water tank water intake No. 2 by statement 102 after 2 hours, stirs working time and micro-aeration time and is controlled by statement 149-169,173-184 respectively; Statement 109-137 is for controlling the complete aeration time of No. 1 water tank, and setting complete aeration time is 2 hours; No. 1 water tank, after the biochemical reaction of 4 hours, is controlled its gravity drainage to MBR water tank by statement 141; No. 2 the complete aeration of water tank is controlled by statement 187-215, controls its water outlet by statement 219; Statement 222-270 is membrane module back flushing setting, x11 connects electric contact vacuum pressure gauge, when film suction negative pressure reaches preheating setting pressure value, and continue more than 20 seconds, A group electrical ball valve is closed B group electrical ball valve and is opened, suction pump therefrom water tank is drawn water membrane module is carried out to back flushing, and setting backwashing time is 3 minutes; After back flushing finishes, reenter normal operating condition, so repeatedly; Program setting system protection program be used for preventing that element fault reason from causing loss, in the time that in MBR water tank, water level is in low-water level, set suction pump stop, preventing film exposed cause membrane flux decline; For preventing overflowing of water in MBR water tank, to set in the time that water level is positioned at high-water, system is out of service.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210029540.3A CN102531160B (en) | 2012-02-10 | 2012-02-10 | Sequencing Batch Membrane Bioreactor (SBMBR) reclaimed water recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210029540.3A CN102531160B (en) | 2012-02-10 | 2012-02-10 | Sequencing Batch Membrane Bioreactor (SBMBR) reclaimed water recycling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102531160A CN102531160A (en) | 2012-07-04 |
| CN102531160B true CN102531160B (en) | 2014-06-25 |
Family
ID=46339379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210029540.3A Expired - Fee Related CN102531160B (en) | 2012-02-10 | 2012-02-10 | Sequencing Batch Membrane Bioreactor (SBMBR) reclaimed water recycling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102531160B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073158A (en) * | 2013-01-25 | 2013-05-01 | 浙江商达环保有限公司 | Intelligent integrated treating equipment for rural sewage |
| CN103787555A (en) * | 2013-01-25 | 2014-05-14 | 浙江商达环保有限公司 | Intelligent rural sewage integrated treatment method |
| CN108911134B (en) * | 2018-07-17 | 2021-06-11 | 厦门理工学院 | Domestic sewage treatment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201670779U (en) * | 2010-03-26 | 2010-12-15 | 北京工业大学 | Device for handling different periods of landfill leachate depth denitrification by two levels of UASB + A/O + SBR processes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010079050A (en) * | 2001-06-08 | 2001-08-22 | 김학로 | SBR omitted |
-
2012
- 2012-02-10 CN CN201210029540.3A patent/CN102531160B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201670779U (en) * | 2010-03-26 | 2010-12-15 | 北京工业大学 | Device for handling different periods of landfill leachate depth denitrification by two levels of UASB + A/O + SBR processes |
Non-Patent Citations (4)
| Title |
|---|
| 两级序批式MBR除磷特性实验研究;元新艳等;《环境工程学报》;20100331;第4卷(第3期);第557页第2栏第2段、第558页第1.1-1.3节及图1 * |
| 元新艳等.两级序批式MBR除磷特性实验研究.《环境工程学报》.2010,第4卷(第3期),第557页第2栏第2段、第558页第1.1-1.3节及图1. |
| 基于PLC的小型污水处理设备的自动控制***设计;张坤明等;《青岛理工大学学报》;20091015;第30卷(第5期);第80页第1节-81页第3节第1段及图1 * |
| 张坤明等.基于PLC的小型污水处理设备的自动控制***设计.《青岛理工大学学报》.2009,第30卷(第5期),第80页第1节-81页第3节第1段及图1. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102531160A (en) | 2012-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101381155B (en) | Bio-ecological combination method for effluent purification and reclamation and apparatus | |
| AU2020102464A4 (en) | A miniaturized air-lift membrane bioreactor for decentralized sewage treatment | |
| CN210122541U (en) | Intelligent sewage advanced treatment system based on micro-nano bubble technology | |
| CN101475287A (en) | Novel membrane-biological membrane reactor system and use thereof | |
| CN201284274Y (en) | Biological and ecological combined apparatus for purifying and recycling sewage | |
| CN201538734U (en) | Sewage treatment device | |
| CN101746883A (en) | Magnetic bioreaction separation device for treating organic wastewater | |
| CN102531160B (en) | Sequencing Batch Membrane Bioreactor (SBMBR) reclaimed water recycling device | |
| CN103641268B (en) | Two-stage biological reactor for treatment percolate instrument and supplies | |
| CN210117318U (en) | Intelligent deep water treatment integrated system | |
| CN102311206A (en) | SBR (Sequencing Batch Reactor)-ultrafiltration membrane sewage reusing device | |
| CN203269735U (en) | Equipment for treating rubbish leachate by utilizing two-stage bioreactors | |
| CN202139145U (en) | SBR (Sequencing Batch Reactor Activated Sludge Process)-ultrafiltration membrane sludge recycling device | |
| CN213865851U (en) | Domestic sewage treatment station | |
| CN114656104A (en) | Energy-saving self-circulation A3O-MBBR sewage treatment device and method thereof | |
| CN104495879B (en) | A kind of integrated form catalytic oxidation/dephosphorization denitrogenation-isolated by filtration bioreactor | |
| CN210393887U (en) | Small-size sewage treatment integration equipment | |
| CN210595675U (en) | Small-size integrated glass steel sewage treatment equipment | |
| CN102976564B (en) | Continuous rural domestic waste water treating device | |
| CN106865899A (en) | A kind of oil gas field high slat-containing wastewater biochemical processing | |
| CN108408908B (en) | Integrated small sewage treatment device and sewage treatment method | |
| CN113480091A (en) | SBBR sewage treatment device and method for removing phosphorus from side stream | |
| CN110590059A (en) | Rural domestic sewage low-cost sewage treatment system | |
| CN204958531U (en) | Master boot record (MBR) membrane biological reactor | |
| CN217297602U (en) | Rural domestic sewage biological treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Lv Mou Inventor after: Liu Qinghua Inventor after: Li Hongwei Inventor after: Zhang Kunming Inventor before: Li Hongwei Inventor before: Liu Qinghua Inventor before: Zhang Kunming Inventor before: Lv Mou |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LI HONGWEI LIU QINGHUA ZHANG KUNMING LV MOU TO: LV MOU LIU QINGHUA LI HONGWEI ZHANG KUNMING |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20190210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |