CN205035213U - Biological wastewater processing system - Google Patents

Abstract

The utility model discloses a biological wastewater processing system, including consecutive anaerobism bioreactor, filter equipment, membrane bioreactor, middle pond and terminal filter equipment, anaerobism bioreactor include and the barrel has set gradually in from top to bottom: circulation zone, first interior circulation zone, NULL distinguish the isotructure in solid -liquid separation district, the second. The utility model discloses improve the anaerobic reactor's in the biological wastewater treater biofilm carrier cycle characteristics to add filter equipment, pollute the biofilm reactor who carries out subsequent processing in order to avoid the biofilm carrier who flows out from anaerobic reactor. The circulation of the living beings of being convenient for carrier to promote the genetic evolution of reactor microorganism, reinforcing throughput.

Description

Biological effluent treatment system

Technical field

The utility model relates to a kind of biological effluent treatment system, belongs to the technical field of environment protection.

Background technology

Alcohol fuel has the features such as clean, renewable, the discharge of carbon monoxide and hydrocarbon polymer in vehicle exhaust can be reduced, it is the important component part of renewable energy source, at substitute energy, environmental protect, promote agriculture industrialization, realize the aspect such as growth of agricultural efficiency, increasing peasant income and there is vital role.At present, the strategic planning of national development alcohol fuel requires " do not strive grain with people, do not strive ground with grain ", and the non-grain alcohol fuel of positive scientific development, adheres to based on non-grain, encourages raw material diversification, becomes Fuel Ethanol development trend.Potato starch matter alcohol fuel mainly comprises the root such as cassava and Ipomoea batatas uncooked amylum raw material, because it has processing characteristics good, be applied to the desirable alternative materials of extensive fuel ethanol production, a large amount of acidic high-temperature high concentrated organic wastewater is produced in potato class non-grain starchiness fuel ethanol production process, often produce 1t alcohol fuel and can produce 11 ~ 15t processing wastewater, wastewater temperature is more than 60 DEG C, pH is 4 ~ 5, COD (chemical oxygen demand (COD)) is 40000 ~ 80000mg/L, viscosity is large, high and the not easily solid-liquid separation of suspension content, but also facing to great number of issues in the treating processes of the waste water produced in non-grain starchy material production alcohol fuel process at qualified discharge: as suspension content is high, intractability is large, processing cost is high, be difficult to be applied to extensive industrialized development etc.Anaerobic-aerobic combination process is the classical technique of fuel ethanol wastewater process.Traditional fuel ethanol wastewater is generally after solid-liquid separation, adopt " one-level anaerobism+aerobic " art breading, but there is pre-treatment costly in traditional technology, investment is large, unstable, thus follow-up anaerobic treatment is made troubles, easily system is impacted, suspended solids content in addition due to such waste water is higher, application high efficiency anaerobic reactor UASB, there is unfavorable factor in EGSB, and there is the residues such as cassava and enter the blockage problem that treatment system causes, large-scale complete mixed anaerobically fermenting not easily stirs, sludge loss problem (digested sludge not easily precipitates recovery) etc., one-level anaerobic effluent viscosity is large simultaneously, solid-liquor separation difficulty, full lees wastewater anaerobic operation volumetric loading is usually at 2.5KgCOD/m ³about d, affects fuel ethanol production and economic benefit, and traditional method is back to one-level high temperature anaerobic tank after thermophilic digestion liquid need being carried out mud separation, causes energy consumption and investment greatly to increase, is not suitable for larger processing system.Before entering secondary anaerobic, suspended substance can not effectively be removed simultaneously, and SS content is still up to 6000 ~ 12000mg/, and the continuous high-efficient having a strong impact on the anaerobic reactors such as follow-up UASB runs.Can not extract the energy (biogas) in waste water to greatest extent, can not effectively be removed by ammonia nitrogen, total nitrogen after traditional aerobic process process, the clearance of nitrogen phosphorus is difficult to reach stable effect simultaneously.Patent " potato class non-grain starchiness alcohol fuel grain liquid processing method " discloses a kind of method of fuel ethanol wastewater process, but secondary anaerobic reactor adopts UASB in the method, gas stirring intensity is more weak, ydrodynamics is poor, add water quality viscosity large, cause mass transfer effect not good, COD clearance is only about 50%.Follow-up aerobic biochemical technique, owing to lacking high-quality carbon source, causes nitric efficiency to decline.

Disclose a kind of fuel ethanol wastewater treatment unit for a kind of high efficiency anaerobic reactor for the process of fuel ethanol wastewater secondary anaerobic of above-mentioned defect patent, to promote anaerobic treatment efficiency, take into account and promote follow-up denitrification effect.But there is the gathering of biofilm carrier in this fuel ethanol wastewater treatment unit in use easy top at reactor, and adopt the zone design that multistage is separated, be unfavorable for the circulation of biofilm carrier, cause the microorganism in fluidized-bed can not realize many generation circulations to select, be unfavorable for that in microbial film, microorganism carries out Genetic evolution towards the direction more adapting to treating material.And often can with the biofilm carrier of anaerobe film in the material exported in this reactor, the membrane bioreactor of contaminate subsequent.

Summary of the invention

Goal of the invention: the purpose of this utility model is to provide a kind of biofilm carrier of being convenient to circulate and the biological effluent treatment system avoiding the membrane bioreactor of clog downstream.

Technical scheme: biological effluent treatment system described in the utility model, comprise the anaerobic biological reactor, filtration unit, membrane bioreactor, intermediate pool and the end-filtration device that are connected successively, described anaerobic biological reactor comprises cylindrical shell, is from top to bottom disposed with in cylindrical shell: solid-liquid displacement zone, the second inner circulation zone, the first inner circulation zone, completely mixing zone;

Be provided with sludge collecting board bottom described complete mixing zone, be provided with water inlet pipe above sludge collecting board, described water inlet pipe extends upward some water inlet pipes bottom described complete mixing zone, and top, described complete mixing zone is also provided with the first aeroscopic plate and the first mud guiding plate; Water inlet pipe can with the mutual basin of inverted cone-shaped structure of spout 20 and sludge collecting board 22 and, abundant reacted biomass carrier fully can be mixed with nutritious new treatment sewage, thus microorganism is fully bred, enhancement process ability.

Described first inner circulation zone be from top to bottom disposed with the second aeroscopic plate, the first reflection cone, the first internal recycle sleeve, described first internal recycle sleeve lower end retracted downward and extend through described first mud guiding plate formed spout, described spout extends downward the bottom of described complete mixing zone always, and points to the central authorities of described sludge collecting board; Biofilm carrier can be avoided like this in the over-deposit of bottom, cause local biologic membrane carrier excessive concentration and reaction mass is not enough, avoid the breeding of microorganism and metabolism suppressed.

Described second inner circulation zone is disposed with collection chamber, the second reflection cone, the second mud guiding plate, the second internal recycle sleeve from top to bottom;

Described anaerobic biological reactor cylindrical shell top is also provided with the biogas fairlead at UNICOM's collection chamber top;

Described solid-liquid displacement zone is provided with water shoot;

Described first aeroscopic plate is circular cone tubular, and taper cone barrel tip down, tip is provided with through hole, and directing material rises outside the first internal recycle sleeve, described first reflection cone again reflective guides material declines inside the first internal recycle sleeve, and flows to described spout and spray downwards;

Described second aeroscopic plate is circular cone tubular, and taper cone barrel tip is upwards, tip is provided with through hole, and the inner side that will the material of gas also had to guide to the second internal recycle sleeve, when flowing to the second reflection cone place, streams reflection is along the lateral current downflow of the second internal recycle sleeve.

Further, the filter screen of described filtration unit is of a size of 10 ~ 45 microns.Like this, the biofilm carrier strictly filtering while biofilm carrier circulating path in anaerobic reactor and be mixed with in anaerobic reactor water outlet can be improved again, avoid follow-up biofilm reactor contaminated.

Further, the filter screen of described end-filtration device is of a size of 5 ~ 75 nanometers.

Further, acid-alkali accommodation system is also configured in described intermediate pool.

Further, drain inlet place, described solid-liquid displacement zone is also provided with filter screen, and described filter screen is a flat screen, and described filter screen is obliquely installed to inner barrel; Described second aeroscopic plate is provided with biomass conduction mouth near the side of water shoot; Biomass conduction mouth gas barrier is provided with below described biomass conduction mouth, described biomass conduction mouth gas barrier is arranged at the cylinder inboard wall place of the below of described biomass conduction mouth, and to be inclined upwardly setting to inner barrel, impact biomass conduction mouth from bottom to top to prevent material; Chemical feed pipe is provided with in described first internal recycle region.

Further, the second described mud guiding plate is circular cone tubular, and upward, just to the bottom of collection chamber, and the bottom section area of described collection chamber is greater than described second mud guiding plate tip section area in taper cone barrel tip; Described first mud guiding plate is circular cone tubular, and upward, tip is provided with through hole in taper cone barrel tip; Via area is 1% ~ 10% of cylindrical shell cross-sectional area, and the inclination angle of taper cone barrel sidewall and horizontal plane is 20 ~ 70 °, and the maximum outside diameter of the first aeroscopic plate is less than the internal diameter of cylindrical shell correspondence position; Described first internal recycle telescopic pipe internal diameter is 60% ~ 90% of cylindrical shell correspondence position internal diameter; The via area of described second aeroscopic plate is 0.1 ~ 5% of cylindrical shell correspondence position cross-sectional area, and the inclination angle of taper cone barrel sidewall and horizontal plane is 20 ~ 70 °; Described second internal recycle telescopic pipe internal diameter is 10% ~ 50% of cylindrical shell correspondence position internal diameter; ; Described collection chamber is taper gas bucket, and tip upward and be provided with through hole and be communicated with biogas fairlead.

The utility model compared with prior art, its beneficial effect is: the biofilm carrier cycle characteristics of the anaerobic reactor in biological effluent treatment device is improved by the utility model, and add filtration unit, pollute to avoid the biofilm carrier flowed out from anaerobic reactor the biofilm reactor carrying out subsequent disposal.Be convenient to the circulation of biomass carrier, thus promote the genetic evolution of microorganism in reactor, enhancement process ability.

Accompanying drawing explanation

Fig. 1 is biological effluent treatment system architecture diagram described in the utility model;

Fig. 2 is anaerobic biological reactor structural representation described in the utility model.

Embodiment

Below technical solutions of the utility model are described in detail, but protection domain of the present utility model is not limited to described embodiment.

Embodiment 1:

The present embodiment comprise the anaerobic biological reactor, filtration unit, membrane bioreactor, intermediate pool and the end-filtration device that connect successively as described in Figure 1.Wherein, the filter screen of described filtration unit is for filtering out biofilm carrier, and size can be 10 ~ 45 micrometer ranges.Choose 10 microns in the present embodiment.For ensureing the quality of terminal water outlet, it is 5 ~ 75 nanometers that the filter screen size of end-filtration device can be chosen for, and is chosen for 75 nanometers in the present embodiment.

Anaerobic biological reactor structure of the present utility model as shown in Figure 2.Wherein solid-liquid displacement zone A, the second inner circulation zone B, the first inner circulation zone C, completely mixing zone D.Be provided with the biomembranous biofilm carrier that surface attachment has microorganism to be formed in reactor in the utility model, in the middle of the present embodiment, use sand.When sewage flow to water inlet pipe 21 from water inlet pipe 16, the sewage that water inlet pipe 21 flows out mixes mutually with the biofilm carrier with microorganism, produces biogas.Under the buoyancy of biogas, streams is driven to rise on complete mixing zone, when arriving the first aeroscopic plate 2 place, streams is guided to the first internal recycle region by the conical external surface of the first aeroscopic plate 2, outer wall along the first internal recycle sleeve 4 rises, when arriving the second aeroscopic plate 5 place, streams containing biogas is guided to the centre portions of the second internal recycle sleeve 7 by the conical wall of the second aeroscopic plate 5, all the other are not then reflected by the first reflection cone 6 containing the streams of biogas, the inner side entering the second internal recycle sleeve 4 flows downward to spout 20 and sprays, arrive the bottom of sludge collecting board 22, thus the biofilm carrier bottom being deposited on of kicking up, the fresh sewage flowed out with water inlet pipe 21 mixes.

Material rising arrival second reflection cone 9 place containing biogas that the centre portions that another road arrives the first internal recycle sleeve 7 via the second aeroscopic plate 5 rises, after making the reflection of the streams not containing biogas, warp moves downward by outside the second internal recycle sleeve 7, bottom further arrival first inner circulation zone, the material containing biogas overflowed in company with the second aeroscopic plate 5 central authorities reenters bottom the first internal recycle sleeve 7.And be separated from the second reflection cone 9 arrive the first mud guiding plate 8 place containing the streams of getting up early, make the biofilm carrier sedimentation in material, and the biogas contained in isolate stream further, and collected by collection chamber 10 and derive via biogas fairlead 13.And the second mud guiding plate 8 also serves the effect of collecting biogas, and the excessive biogas that cannot be covered by collection chamber 10 also guides to the bottom of collection chamber 10, thus avoids biogas to leak, and without the need to additionally arranging gas solid separation ring flat-plate and vapor pipe.Through being discharged by water shoot 14 after the sewage handled well is then filtered by the filter screen 19 of reactor the top.The filter screen 19 filtered herein is obliquely installed, and prevents biomass from assembling blocking filter screen 19.

In the present embodiment, streams through being flowed downward by the both sides of the first mud guiding plate 8 after the biofilm carrier sedimentation of this place's enrichment flows to biomass conduction mouth 23, biomass conduction mouth via biomass conduction mouth 23 arrives the second inner circulation zone, penetrate from spout 20 downwards via the first internal recycle sleeve 4 center with streams, arrive the bottommost of reactor.Thus complete inside reactor biofilm carrier circulation from top to bottom.The biofilm carrier of top containing breeding many generations can circulate arrival reactor bottom, promotes that the circulation of inside reactor microflora is developed.

The anaerobic biological reactor of the present embodiment is in order to process crude fuel alcohol wastewater, the crude fuel alcohol wastewater one-level anaerobically fermenting water outlet COD8000mg/L wherein inputted, enter the reactor of UASB reactor and the present embodiment respectively, after entering UASB reactor for treatment, water outlet COD is 4000mg/L, SS is 2000mg/L, this reactor water outlet COD is 1850mg/L, SS is 550mg/L.End-filtration device water outlet COD is less than 20mg/L, and SS is 0, has excellent filter effect.

As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model not departing from claims definition, various change can be made in the form and details to it.

Claims (6)

1. a biological effluent treatment system, it is characterized in that, comprise the anaerobic biological reactor, filtration unit, membrane bioreactor, intermediate pool and the end-filtration device that are connected successively, described anaerobic biological reactor comprises cylindrical shell (1), is from top to bottom disposed with in cylindrical shell: solid-liquid displacement zone, the second inner circulation zone, the first inner circulation zone, completely mixing zone;

Sludge collecting board (22) is provided with bottom described complete mixing zone, sludge collecting board (22) top is provided with water inlet pipe (16), described water inlet pipe (16) extends upward some water inlet pipes (21) bottom described complete mixing zone, and top, described complete mixing zone is also provided with the first aeroscopic plate (3) and the first mud guiding plate (2);

Described first inner circulation zone be from top to bottom disposed with the second aeroscopic plate (5), the first reflection cone (6), the first internal recycle sleeve (4), described first internal recycle sleeve (4) lower end retracted downward and extend through described first mud guiding plate (2) formed spout (20), described spout (20) extends downward the bottom of described complete mixing zone always, and points to the central authorities of described sludge collecting board (22);

Described second inner circulation zone is disposed with collection chamber (10), the second reflection cone (9), the second mud guiding plate (8), the second internal recycle sleeve (7) from top to bottom;

Described anaerobic biological reactor cylindrical shell top is also provided with the biogas fairlead (13) at UNICOM's collection chamber (10) top;

Described solid-liquid displacement zone is provided with water shoot (14);

Described first aeroscopic plate (3) is circular cone tubular, and taper cone barrel tip down, tip is provided with through hole, and directing material rises along the first internal recycle sleeve (4) outside, described first reflection cone (6) again reflective guides material declines along the first internal recycle sleeve (4) inner side, and flows to described spout (20) and spray downwards;

Described second aeroscopic plate (5) is circular cone tubular, and taper cone barrel tip upwards, tip is provided with through hole, and the inner side that will the material of gas also had to guide to the second internal recycle sleeve (7), when flowing to the second reflection cone (9) place, streams reflection is along the lateral current downflow of the second internal recycle sleeve (7).

2. biological effluent treatment system according to claim 1, is characterized in that, the filter screen of described filtration unit is of a size of 10 ~ 45 microns.

3. biological effluent treatment system according to claim 1, is characterized in that, the filter screen of described end-filtration device is of a size of 5 ~ 75 nanometers.

4. biological effluent treatment system according to claim 1, is characterized in that, also configures acid-alkali accommodation system in described intermediate pool.

5. biological effluent treatment system according to claim 1, it is characterized in that, water shoot (14) ingress, described solid-liquid displacement zone is also provided with filter screen (19), described filter screen (19) is a flat screen, and described filter screen (19) is arranged to cylindrical shell (1) inner inclination; Described second aeroscopic plate (5) is provided with biomass conduction mouth (23) near the side of water shoot (14); Described biomass conduction mouth (23) below is provided with biomass conduction mouth gas barrier (24), described biomass conduction mouth gas barrier (24) are arranged at cylindrical shell (1) the inwall place of the below of described biomass conduction mouth (24), and the setting that is inclined upwardly to cylindrical shell (1) inside, impact biomass conduction mouth (24) from bottom to top to prevent material; Chemical feed pipe (17) is provided with in described first internal recycle region.

6. biological effluent treatment system according to claim 1, it is characterized in that, described the second mud guiding plate (8) is circular cone tubular, taper cone barrel tip upward, just to the bottom of collection chamber (10), and the bottom section area of described collection chamber (10) is greater than described second mud guiding plate (8) tip section area; Described first mud guiding plate (2) is circular cone tubular, and upward, tip is provided with through hole in taper cone barrel tip; Via area is 1% ~ 10% of cylindrical shell (1) cross-sectional area, and the inclination angle of taper cone barrel sidewall and horizontal plane is 20 ~ 70 °, and the maximum outside diameter of the first aeroscopic plate (3) is less than the internal diameter of cylindrical shell correspondence position; Described first internal recycle sleeve (4) bore is 60% ~ 90% of cylindrical shell correspondence position internal diameter; The via area of described second aeroscopic plate (5) is 0.1 ~ 5% of cylindrical shell correspondence position cross-sectional area, and the inclination angle of taper cone barrel sidewall and horizontal plane is 20 ~ 70 °; Described second internal recycle sleeve (7) bore is 10% ~ 50% of cylindrical shell (1) correspondence position internal diameter; Described collection chamber (10) is taper gas bucket, tip upward and be provided with through hole be communicated with biogas fairlead (13).