CN205275428U - System for sanitation station filter liquor is handled from full embrane method to exterior division - Google Patents
System for sanitation station filter liquor is handled from full embrane method to exterior division Download PDFInfo
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- CN205275428U CN205275428U CN201620014482.0U CN201620014482U CN205275428U CN 205275428 U CN205275428 U CN 205275428U CN 201620014482 U CN201620014482 U CN 201620014482U CN 205275428 U CN205275428 U CN 205275428U
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Abstract
The utility model discloses a system for sanitation station filter liquor is handled from full embrane method to exterior division, including gravity oil removal unit, ion flotation unit, anaerobism unit, good oxygen unit and the deep purification unit that connects gradually, the anaerobism unit includes and anaerobism sludge bulking bed and anaerobism membrane separation device is equipped with the mixed liquid recycle pipe between anaerobism membrane separation device and anaerobism sludge bulking bed, good oxygen unit has included the oxygen activated sludge reactor oxygen membrane separation device that becomes reconciled, and it is equipped with sludge return pipe to become reconciled at good oxygen membrane separation device between the oxygen activated sludge reactor. It utilizes two steps of deoilings, solved the basis of oil slick and oil emulsion in the filter liquor on, adopt the little biodegradable of full flow to combine membrane separation circulation system, realized the microorganism looks, produced relatively independent in the method of operation of aqueous phase and marsh gas, under the biological solid concentration that keeps high, high circulation stirring strength and high solid -liquid separation efficiency, messenger's organic matter especially difficult degradation macromolecule organic matter can be degraded.
Description
Technical field
The utility model relates to a kind of sewage disposal, particularly the system of outer separation full embrane method process environmental sanitation station filtrate.
Background technology
The collection of current domestic waste and process, disposal are tending towards standardization gradually, and a lot of big city has established garbage transfer station zonal, that have considerable scale all, i.e. environmental sanitation station. The rubbish collection dolly of each residential quarter, garbage collection points is transported in environmental sanitation station and is poured in the rubbish container cheated with being placed on, and transports outward after compression. Owing to containing a large amount of biodegradable organic waste in rubbish, and being the higher material of water content (general water content 40-80%), very easily produce rubbish waste liquid, the flushing waste water simultaneously having refuse receptacle and ground produces. Owing to containing changing food waste in rubbish, such waste water, in muddy emulsion form, containing a large amount of oil in water emulsions and polymer hardly degraded organic substance, if dealing with improperly or infiltrating ground around, will cause serious environmental pollution.
Owing to rubbish squeezes from generation to environmental sanitation station, the timed interval is generally no more than 1-2d, therefore the percolate of its wastewater property and refuse landfill makes a big difference: first, for the environmental sanitation station of certain area coverage, certain collection mode, its water quality characteristic is more stable, there will not be the fluctuation of " young-middle aged-old " landfill percolate, but when classifying incomplete, have the pollutent that biochemical treatment is toxic; Secondly, owing to rubbish period of storage before the compression is short, most of organic waste does not start degraded, and organonitrogen and ammonia-nitrogen content in waste water are all lower; Soluble solid, salt content are higher, and when there being industrial refuse to be mixed into, heavy metal ion content is higher; Macromole organic contamination substrate concentration height, is difficult to biological degradation by common biochemistry.
Water quality according to logarithm environmental sanitation station filtrate carries out detected result, and such waste water COD is about 6000-20000mg/L, and BOD is about 3000-10000mg/L, and TN is about 100-200mg/L, NH3-N is about 50-100mg/L, and TP is about 10-20mg/L, and the oil-contg of indivedual waste water reaches more than 1000mg/L, is wherein mainly oil in water emulsion.
At present, the research about this type of waste water is less, and engineer applied is also in the initial test stage, and big multipair water quality situation awareness is inadequate, and technological design is also ripe not. Must investigating from source when such waste water designs, fully understand kind and the proportion of environmental sanitation station rubbish, the impact of the filtrate waste water quality it caused should give sufficient estimation. Such as regulation in " China national Hazardous Waste List ": the useless medicine produced in family daily life and packing material, useless sterilant and sterilizing agent and packing material, waste oil paint and hold agent and packing material, waste mineral oil and packing material, waste films and useless printing paper, waste fluorescent light tube, useless thermometer, useless sphygmomanometer, waste Ni-Cd battery and mercuric oxide cell and electrical type Hazardous wastes etc., it is possible to manage not in accordance with Hazardous wastes. " oily water treatment engineering technical specifications " specifies: the disposal of oily sludge should meet the pertinent regulations of Hazardous wastes. These refuses once be mixed into domestic refuse, can dissolve in filtrate and affect follow-up treating processes in rubbish expressing process. If these pollutents not taked effective pre-treatment measure, the inefficacy of anaerobism or aerobic treatment unit will be caused.
The environmental sanitation station waste water disposal facility that part is built at present, mostly adopt tradition anaerobism to add aerobic technique, pretreatment unit is not set, when anaerobic unit anti impulsion load ability is more weak, anaerobic treatment load is low, clearance is low, still contains the COD of higher concentration in water outlet. After waste water enters aerobic unit, aeration rate is big, the residence time is long, the extracellular enzyme of final residual in waste water, humic acid class not biodegradable organic, water outlet only can reach the requirement of " comprehensive discharge standard " grade III Standard, and floor space is big, effluent quality is unstable, causes load impact for end Sewage Plant or surrounding enviroment are caused potential safety hazard.
Practical novel content
The purpose of this utility model is the system providing a kind of outer separation efficiently full embrane method process environmental sanitation station filtrate in order to solve above-mentioned the deficiencies in the prior art, make organism wherein especially difficult degradation larger molecular organics be able to effective degraded, improve process effect and the effluent quality of each unit, make water outlet after deep purifying, produce the requirement that the every index of water can reach " urban sewage reutilization urban reclaimed water water quality ".
In order to realize above-mentioned purpose, the system of the full embrane method process of the outer separation designed by the utility model environmental sanitation station filtrate, comprise the gravity oil removal unit, ion flotation unit, anaerobic unit, aerobic unit and the deep purifying unit that connect successively, it is provided with oil partition tank in described gravity oil removal unit, in described ion flotation unit, it is provided with ion flotation machine; Described anaerobic unit comprises anaerobic expanded granular sludge bed and anaerobic membrane tripping device, is provided with mixed-liquor return pipe between anaerobic membrane tripping device and anaerobic expanded granular sludge bed; Described aerobic unit comprises aerobic activated sludge reactor and aerobic membrane separation unit, and becoming reconciled at aerobic membrane separation unit is provided with mud return line between oxygen activity sewage sludge reactor; Described deep purifying unit comprises ozone catalytic device, absorbent charcoal adsorber and reverse osmosis membrane separation device.
The form of described oil partition tank is flat flow, parallel plate type or inclined plate type.
Described anaerobic membrane tripping device and aerobic membrane separation unit are equipped with external placed type tubular membrane component, according to the size of the height of influent COD and the water yield, can adopt pump put forward horizontal or air lift rectilinear.
The method of a kind of outer separation full embrane method process environmental sanitation station filtrate, comprise the system adopting above-mentioned outer separation full embrane method process environmental sanitation station filtrate, wherein filtrate enters former pond through collecting, enter oil partition tank through pump lifting and carry out gravity except, after oil slick, ion flotation machine being removed oil in water emulsion further and is partly dissolved oil, waste water after oil removing enters anaerobic expanded granular sludge bed, the formation of granule sludge is carried out at this, expand, with fully mixing and the absorption of organism of water inlet, mass transfer and degraded, in order to the sludge concentration improved in anaerobic expanded granular sludge bed, promote the formation of granule sludge, strengthen stirring intensity, improve the clearance of speed of reaction and difficult degradation larger molecular organics, by in the muddy water mixed solution inflow anaerobic membrane tripping device of body of wadding a quilt with cotton containing mud in the middle top of anaerobic expanded granular sludge bed, and under the hydraulic shear of suitable flow velocity, the particle mixed solution containing anaerobion solid is separated, wherein it is separated the mixed solution obtained and it is circulated to anaerobic expanded granular sludge bed through solid liquid mixed-liquor return pipe, the water outlet of separation enters the aerobic decomposition that aerobic activated sludge reactor carries out the organism such as small molecules, utilize aerobic membrane separation unit to be separated by aerobic sludge simultaneously, wherein it is separated the mud obtained and it is circulated to aerobic activated sludge reactor through mud return line, the water outlet that separation obtains enters deep purifying unit, through ozone catalytic device, after the process of absorbent charcoal adsorber and reverse osmosis membrane separation device, reuse can be carried out.
In order to improve in anaerobic expanded granular sludge bed stirring extent, reduce the crossflow velocity of anaerobic membrane tripping device thus lessening membrane fouling, reduction flow velocity to the hydraulic shear effect of microbe granular, described anaerobic expanded granular sludge bed top is also connected with collecting methane unit, stirs to carry out the circulation of biogas.
The biogas that described anaerobic expanded granular sludge bed produces enters collecting methane unit from top, then utilize compressor that part biogas is sent into the entrance of anaerobic membrane tripping device, and flow through filter membrane together with mixed solution, then it is circulated to through mixed-liquor return pipe and enters bottom anaerobic expanded granular sludge bed and stir mud. Can it being utilized when biogas output is big, amount hour can arrange flare combustion apparatus by its thorough combustion decomposition.
First two-stage substep oil removing is carried out for filtrate waste water, oil partition tank is removed the oil that particle diameter is more than or equal to 60-100 ��m and is dripped, the clearance of oil slick is reached more than 70%, its form can be selected according to the floor space of the practical situation of water, requirement, initial cost, maintenance degree of cleaning etc., there are flat flow, parallel plate type or inclined plate type, it is possible to improve oil slick and the removal effect of dispersion oil by adding acid for adjusting pH value; Ion flotation machine can be removed the oil being less than 5-10 ��m and drip, Inorganic floatation agent adopts inorganic aluminate or ferrous salt, organic flotation agent employing breakdown of emulsion stabilising effect is good, residue is low mixes the cationic organic high-molecular flotation agent in emulsus with water, oil-contg can be reduced to below 10mg/L, the clearance of oil in water emulsion is greater than 80%. Owing to the oil in water can stick to the outside surface of microorganism, suppressing it to breathe and metabolic function, therefore, the oil-contg of the oily(waste)water usually requiring to enter biological treatment structures must not more than 30mg/L. And obtain removal through first step oil removing of the present utility model, oil slick and dispersion oil, but oil in water emulsion need to be removed through the second stage and ion flotation machine, can guarantee the steady running of follow-up biochemical system; Also can remove a certain amount of heavy metal ion in ion flotation process simultaneously.
Secondly in anaerobic unit, waste water enters from the bottom of anaerobic expanded granular sludge bed, by anaerobic grain sludge bed, mix with the solid liquid mixed solution come from the backflow of anaerobic membrane tripping device through mixed-liquor return pipe simultaneously, rise to the effluent recycling district on middle top with the up-flow speed of 10-15m/h. In the process, larger molecular organics carries out degrading and is converted into CO2And CH4, the top that they rise to anaerobic expanded granular sludge bed is expelled to collecting methane unit, produces to stir and gas stripping to Sludge Bed in uphill process simultaneously, and the upflow velocity of amounting to that this effect produces is about 6-8m/h. And the standing sedimentation speed of the granule sludge that native system produces is about 60-80m/h, therefore under high current and air-flow mix and blend intensity, most of granule sludge still can concentrate in the Sludge Bed of middle bottom, and do not flow out with water outlet, go out stream part with water and carry out partitioning cycle by external anaerobic membrane tripping device.
Organic matter fermentation degraded, external film solid-liquid separation, microbial solid that in described anaerobic unit, anaerobic expanded granular sludge bed and anaerobic membrane tripping device form circulate, biogas is separated into an entirety, but the system that operation scheme is relatively independent, at HRT(hydraulic detention time) only 1-2d time, SRT(sludge retention time) can up to more than 30-50d. Under high biosolids concentration, high circulation stirring intensity, high upflow velocity and Sludge Bed are swelling state, make organism especially difficult degradation larger molecular organics be able to effective degraded, and there is the effluent quality that high solid-liquid separation efficiency is become reconciled.
Described anaerobic expanded granular sludge bed is the variant of common anaerobic expanded granular sludge bed, it eliminates common EGSB and separation condition is required extremely strict triphase separator, solid-liquid separation relies on external anaerobic membrane tripping device to realize, loop back the main crossflow velocity according to anaerobic membrane separating circulating device of size of flow and up-flow speed, hydraulic shear on the impact of Granular sludge formation, microorganism and the mixing contact conditions of entering organic matter of water and determine, solve the contradiction between the difficult sludge loss caused of high up-flow speed or mixture strength and solid-liquid separation; Anaerobic expanded granular sludge bed does not establish water port in addition, and middle top mixed solution enters anaerobic membrane tripping device, and the microbial solid retained carries out reflux cycle, and the product water of film is the water outlet of anaerobic unit. Wherein crossflow velocity 1-2m/s, mean sludge concentration maintains 20-40g/L, the clearance more than 85% of dope reflux ratio 85%-90%, COD, membrane module filtering accuracy 0.1-0.2 ��m.
In addition in filtrate after the process of anaerobic unit, macromolecular substance is decomposed in acidication stage part, and the COD major part of small molecules state is utilized by anerobe and transforms in order to CH4And CO2Removing from system, the pollutent of suspended state has also been retained by external placed type anaerobic membrane. In addition, in native system, the filtering accuracy of the anaerobic membrane tripping device of external placed type controls at 0.1-0.2 ��m, retain suspended solids also been removed simultaneously bacterium, part virus and large size colloid, although now the water outlet of anaerobism is very limpid, but the pollutent remained in waste water also has the small organic molecule of solvability, and (molecular weight is less than 1000, such as sugar, free acid, VITAMIN etc.), salinity, ammonia nitrogen etc., COD content is also higher simultaneously. Therefore further process is still needed, therefore native system adopts aerobic activated sludge reactor, in conjunction with aerobic membrane separation unit, it is carried out aerobic decomposition. Although owing in the filtrate of environmental sanitation station, ammonia-nitrogen content is very low, but organonitrogen accounts for large percentage, this part organonitrogen, after the anaerobic process of front end, is decomposed and the ammonia-nitrogen content in water can be caused far away higher than water inlet. Therefore need to consider BOD at aerobic stage5Removal and NH3The removal of-N, improves the ratio shared by nitrifier simultaneously as far as possible. In order to reach such object, the technique that the utility model employing active sludge combines with external membrane sepn, retains nitrifier and heterotrophic bacterium, raising sludge concentration, reduces sludge loading, it is to increase effluent quality. Aerobic being divided into two benches, operate in the deceleration propagation phase previous stage, the latter half operates in the endogenous respiration phase. The advantage of this way is: reduces the volume of Aerobic Pond, reduce the organic concentration entering in film pipe and then improve the ratio of nitrifier in membrane flux, lessening membrane fouling, raising subordinate phase aeration tank.
Aerobic membrane separation unit still adopts external placed type tubular membrane, and it can remove colloid, protein, microorganism and larger molecular organics. By the ratio of the microorganism concn that retains and improve in reactor, nitrifier, its essence is the operation process of little useful volume, high sludge concentration, low sludge loading, to the waste water containing high kelvin nitrogen, has important guarantee meaning.
Last in order to reach the standard of reuse water, at the end of system, deep purifying unit is set. Owing to front section is produced the water outlet that water is UF film, therefore do not need to establish mechanical screening device again in this stage, the combination of ozone catalytic device, absorbent charcoal adsorber and reverse osmosis membrane separation device can be adopted.
The system of the outer separation that the utility model obtains full embrane method process environmental sanitation station filtrate utilizes two step oil removings, solve on the basis of the oil slick in filtrate and oil in water emulsion, adopt whole process microbiological deterioration binding film separating system, achieve microorganism phase, produce aqueous phase and biogas in operation scheme relatively independent, keeping under high biosolids concentration, high circulation stirring intensity and high solid-liquid separation efficiency, make organism especially difficult degradation larger molecular organics be able to effective degraded.
The method of the outer separation that the utility model obtains full embrane method process environmental sanitation station filtrate, each unit step is combined closely, can effectively remove the pollution factors such as the chemical oxygen demand (COD) in the filtrate of environmental sanitation station, nitrogen and phosphorus, processing unit can workshop be processed into integration apparatus, convenient transportation, the duration compared with short, floor space is little, process effluent quality good, the requirement of " urban sewage reutilization urban reclaimed water water quality " can be reached.
Accompanying drawing explanation
Fig. 1 is the schema of the system of the outer separation full embrane method process environmental sanitation station filtrate of embodiment 1;
Fig. 2 is the schema of the system of the outer separation full embrane method process environmental sanitation station filtrate of embodiment 2.
In figure: former pond 1, oil partition tank 2, ion flotation machine 3, anaerobic expanded granular sludge bed 4, anaerobic membrane tripping device 5, aerobic activated sludge reactor 6, aerobic membrane separation unit 7, ozone catalytic device 8, absorbent charcoal adsorber 9, reverse osmosis membrane separation device 10, mixed-liquor return pipe 12, mud return line 13, collecting methane unit 14.
Embodiment
Below in conjunction with drawings and Examples, the utility model is illustrated further.
Embodiment 1:
As shown in Figure 1, the system of a kind of outer separation that the present embodiment provides full embrane method process environmental sanitation station filtrate, comprise the gravity oil removal unit, ion flotation unit, anaerobic unit, aerobic unit and the deep purifying unit that connect successively, it is provided with oil partition tank 2 in described gravity oil removal unit, in described ion flotation unit, it is provided with ion flotation machine 3; Described anaerobic unit comprises anaerobic expanded granular sludge bed 4 and anaerobic membrane tripping device 5, is provided with mixed-liquor return pipe 12 between anaerobic membrane tripping device 5 and anaerobic expanded granular sludge bed 4; Described aerobic unit comprises aerobic activated sludge reactor 6 and aerobic membrane separation unit 7, and becoming reconciled at aerobic membrane separation unit 7 is provided with mud return line 13 between oxygen activity sewage sludge reactor 6; Described deep purifying unit comprises ozone catalytic device 8, absorbent charcoal adsorber 9 and reverse osmosis membrane separation device 10.
The form of described oil partition tank 2 is flat flow, parallel plate type or inclined plate type.
Described anaerobic membrane tripping device 5 and aerobic membrane separation unit 7 are equipped with external placed type tubular membrane component.
The method of a kind of outer separation full embrane method process environmental sanitation station filtrate, comprise the system adopting above-mentioned outer separation full embrane method process environmental sanitation station filtrate, filtrate enters former pond 1 through collecting, enter oil partition tank 2 through pump lifting and carry out gravity except, after oil slick, ion flotation machine 3 being removed oil in water emulsion further and is partly dissolved oil, waste water after oil removing enters anaerobic expanded granular sludge bed 4, carries out the formation of granule sludge, fully the mixing and the absorption of organism, mass transfer and degraded of expansion and water inlet at this, in order to the sludge concentration improved in anaerobic expanded granular sludge bed 4, promote the formation of granule sludge, strengthen stirring intensity, improve the clearance of speed of reaction and difficult degradation larger molecular organics, by in the muddy water mixed solution inflow anaerobic membrane tripping device 5 of body of wadding a quilt with cotton containing mud in the middle top of anaerobic expanded granular sludge bed 4, and under the hydraulic shear of suitable flow velocity, the particle mixed solution containing anaerobion solid is separated, wherein it is separated the mixed solution obtained and it is circulated to anaerobic expanded granular sludge bed 4 through solid liquid mixed-liquor return pipe 12, the water outlet of separation enters the aerobic decomposition that aerobic activated sludge reactor 6 carries out the organism such as small molecules, utilize aerobic membrane separation unit 7 to be separated by aerobic sludge simultaneously, wherein it is separated the mud obtained and it is circulated to aerobic activated sludge reactor 6 through mud return line 13, the water outlet that separation obtains enters deep purifying unit, through ozone catalytic device 8, after the process of absorbent charcoal adsorber 9 and reverse osmosis membrane separation device 10, reuse can be carried out.
Flow process is after deep purifying unit, and the product water of reverse osmosis membrane separation device 10 can stablize the requirement reaching " urban sewage reutilization urban reclaimed water water quality ".
Embodiment 2:
As shown in Figure 2, the system of a kind of outer separation that the present embodiment provides full embrane method process environmental sanitation station filtrate, flow process is identical with embodiment 1 substantially for it, but in concrete use procedure, in order to improve in anaerobic expanded granular sludge bed 4 stirring extent, reduce the crossflow velocity of anaerobic membrane tripping device 5 thus lessening membrane fouling, reduction flow velocity to the hydraulic shear effect of microbe granular, described anaerobic expanded granular sludge bed 4 top is also connected with collecting methane unit 14. The biogas that described anaerobic expanded granular sludge bed 4 produces enters collecting methane unit 14 from top, then utilize compressor that part biogas is sent into the entrance of anaerobic membrane tripping device 5, and flow through filter membrane together with mixed solution, then it is circulated to through mixed-liquor return pipe 12 and enters bottom anaerobic expanded granular sludge bed 4 and stir mud. Can it being utilized when biogas output is big, amount hour can arrange flare combustion apparatus by its thorough combustion decomposition.
Claims (4)
1. one kind is separated the system of full embrane method process environmental sanitation station filtrate outward, it comprises the gravity oil removal unit, ion flotation unit, anaerobic unit, aerobic unit and the deep purifying unit that connect successively, it is characterized in that: be provided with oil partition tank (2) in described gravity oil removal unit, in described ion flotation unit, be provided with ion flotation machine (3); Described anaerobic unit comprises anaerobic expanded granular sludge bed (4) and anaerobic membrane tripping device (5), is provided with mixed-liquor return pipe (12) between anaerobic membrane tripping device (5) and anaerobic expanded granular sludge bed (4); Described aerobic unit comprises aerobic activated sludge reactor (6) and aerobic membrane separation unit (7), and becoming reconciled at aerobic membrane separation unit (7) is provided with mud return line (13) between oxygen activity sewage sludge reactor (6); Described deep purifying unit comprises ozone catalytic device (8), absorbent charcoal adsorber (9) and reverse osmosis membrane separation device (10).
2. the system of outer separation according to claim 1 full embrane method process environmental sanitation station filtrate, it is characterised in that: the form of described oil partition tank (2) is flat flow, parallel plate type or inclined plate type.
3. the system of outer separation according to claim 1 full embrane method process environmental sanitation station filtrate, it is characterised in that: described anaerobic membrane tripping device (5) and aerobic membrane separation unit (7) are equipped with external placed type tubular membrane component.
4. the system of outer separation according to claim 1 full embrane method process environmental sanitation station filtrate, it is characterised in that: described anaerobic expanded granular sludge bed (4) top is connected with collecting methane unit (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620014482.0U CN205275428U (en) | 2016-01-08 | 2016-01-08 | System for sanitation station filter liquor is handled from full embrane method to exterior division |
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| CN201620014482.0U CN205275428U (en) | 2016-01-08 | 2016-01-08 | System for sanitation station filter liquor is handled from full embrane method to exterior division |
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| CN205275428U true CN205275428U (en) | 2016-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481185A (en) * | 2016-01-08 | 2016-04-13 | 宁波绿色方舟环境科技有限公司 | System and method for treating filtrate of environmental sanitation station through outward-separating integrated membrane technology |
-
2016
- 2016-01-08 CN CN201620014482.0U patent/CN205275428U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481185A (en) * | 2016-01-08 | 2016-04-13 | 宁波绿色方舟环境科技有限公司 | System and method for treating filtrate of environmental sanitation station through outward-separating integrated membrane technology |
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Granted publication date: 20160601 Effective date of abandoning: 20180911 |